CN103381809B

CN103381809B - Method and system for power train disconnect-type clutch

Info

Publication number: CN103381809B
Application number: CN201310160938.5A
Authority: CN
Inventors: A·O’C·吉布森; F·涅多列佐夫; J·A·多林; 姜洪
Original assignee: Ford Global Technologies LLC
Current assignee: Ford Global Technologies LLC
Priority date: 2012-05-04
Filing date: 2013-05-03
Publication date: 2018-12-07
Anticipated expiration: 2033-05-03
Also published as: CN103381809A

Abstract

The system and method that the present invention discloses the operation for improving hybrid vehicle.In one example, the compensation for power train disconnect-type clutch is provided.This method can reduce drive train torque interference.

Description

Method and system for power train disconnect-type clutch

Cross reference to related applications

This application claims the priority for the U.S. Provisional Patent Application 61/643,137 that on May 4th, 2012 submits, for institute Its entire content of some purposes is incorporated herein by reference.

Technical field

The present invention relates to the system and method for driving performance and fuel economy for improving vehicle.For selectively Be connected to motor and speed changer engine this method can be it is particularly useful.

Background technique

Some hybrid vehicles may include power train disconnect-type clutch, which can be with machine A part of power train and the second part of the power train is isolated to tool.For example, engine can via power train separate type from Clutch is selectively isolated with speed changer and wheel, therefore speed changer and wheel can be run independently of engine.Even if starting Machine has stopped operating, and power train disconnect-type clutch is but also torque can be supplied to power train to push vehicle.But During desired requirement or the higher situation of drive train torque, power train disconnect-type clutch can be closed desired by offer It is required that torque.If the torque of power train disconnect-type clutch transmitting is more than desired torque, it is closed the clutch of power train separate type Torque can be interfered and introduce power train by device.Specifically, being closed power train disconnect-type clutch during engine start can be with Cause to be significant drive train torque interference for driver.Therefore, including separating the power train of clutch for improving vehicle Fuel economy is highly useful, but increased fuel economy may be to increase noise of driving system vibration and uncomfortable Property (NVH) be cost.

Summary of the invention

Inventors herein have recognized that shortcomings noted above and having developed a kind of dynamic for running mixing The method of power vehicle, comprising: response engine start requires to open the torque converter clutch of closure；With the desired liquid of response Power torque converter pump wheel speed adjusts power train integrated actuating machine/generator (DISG) speed.

It can be reduced by the torque converter clutch that response engine start opens closure by closure power train The interference of drive train torque caused by disconnect-type clutch.Furthermore, it is possible to which the speed for adjusting DISG passes through fluid power to control The amount of the torque of torque-converters, therefore drive train torque pulsation can reduce before passing to wheel via speed changer.

In another embodiment, a kind of method of operation of hybrid vehicle includes: that response engine start requirement is beaten It is opened and closed the torque converter clutch closed；Power train integrated actuating machine/generator (DISG) is run with speed control mode；Response Desired face of fluid torque converter speed adjusts DISG speed；And started by closure power train disconnect-type clutch starting Machine.

In another embodiment, this method further includes responding desired face of fluid torque converter torque to adjust DISG speed Degree.

In another embodiment, DISG speed is simultaneously adjusted with closure power train disconnect-type clutch.

In another embodiment, this method further includes responding DISG during being closed power train disconnect-type clutch to adjust Torque output adjusts power train disconnect-type clutch transmission function.

In another embodiment, starting engine by closure power train disconnect-type clutch includes partly being closed to pass It is dynamic to be disconnect-type clutch and be then all closed the closure power train disconnect-type clutch, so that when engine speed is basic Power train disconnect-type clutch input speed matches power train disconnect-type clutch output speed when equal to DISG speed.

In another embodiment, a kind of hybrid vehicle powertrain systems system includes: fluid torque-converter；Power train is integrated Starter/generator (DISG)；Engine；Power train disconnect-type clutch between the engine and DISG is set；And Controller, the controller include non-transient instruction, and the non-transient instruction is executable to run the DISG with speed control mode And it responds transformer turbine speed and desired face of fluid torque converter torque and provides hope by adjusting DISG speed Face of fluid torque converter torque.

In another embodiment, which further includes additional executable non-transient Instruction, for being closed power train separate type when engine speed is substantially equal to DISG speed for the first time after the engine is stopped Clutch.

In another embodiment, which further includes additional executable non-transient Instruction, the requirement for responding starting engine are closed power train disconnect-type clutch.

In another embodiment, which further includes additional executable non-transient Instruction, for estimating the power train disconnect-type clutch torque according to power train disconnect-type clutch application of force/active force.

In another embodiment, which further includes DISG velocity sensor and is used for true Determine the transformer turbine velocity sensor of transformer turbine speed.

In another embodiment, speed control mode includes adjusting DISG torque to adjust DISG speed.

The present invention can have several advantages.Specifically, this method can reduce the drive train torque of hybrid vehicle Interference.Moreover, this method can improve the driving performance of vehicle.In addition, this method can reduce driveline wear, thus increase The working life of power train.

Above-mentioned advantage and other advantages of the invention and feature individual or in conjunction with attached drawing detailed specific implementation below In mode clearly.

It should be understood that providing summary of the invention above is the design in order to introduce selection in a simple form, this design It further describes in a specific embodiment.This is not meant to the key or substantive characteristics of pointing out theme claimed, The range of theme claimed is uniquely limited by appended claims.Moreover, theme claimed is not limited to solve The embodiment for any disadvantage that certainly above or any part of the invention is pointed out.

Detailed description of the invention

By individually or being read in conjunction with the figure the example (being called specific embodiment herein) of embodiment, will more in sufficiently The advantages of understanding is described herein, in which:

Fig. 1 is the schematic diagram of engine；

Fig. 2 shows the first example vehicle powertrain arrangements；

Fig. 3 shows the second example vehicle powertrain arrangement；

Fig. 4 is an exemplary flow chart for showing the method operation vehicle transmission system described with subsequent attached drawing；

Fig. 5-8 shows the flow chart and shape of the powertrain for responding traveling route conditions operation of hybrid vehicle Condition；

Fig. 9 and 10, which is shown, adjusts the method for powertrain operation and the timing of indication for responding vehicle mass；

Figure 11 and 12 shows the method for starting hybrid vehicle and the timing of indication；

Figure 13 and 14 show during engine start for adjusts to the fuel of hybrid powertrain method and in advance The timing shown；

Figure 15-18 show during shifting of transmission start hybrid vehicle engine method and indication when Sequence；

Figure 19-22 shows the method for providing flywheel and the compensation of power train disconnect-type clutch and the timing of indication；

Figure 23-26 shows the method for stopping hybrid vehicle and the timing of indication；

Figure 27 and 28 is shown in the case where stopping engine on slope for keeping the method and indication of hybrid vehicle Timing；

Figure 29 A-36 is shown in the case where power train braking for running the method and indication of hybrid powertrain Timing；

Figure 37-40 show for the method for navigation (sailing) mode operation hybrid powertrain and indication when Sequence；

Figure 41-44 shows the method for the operation of adaptive change power train disconnect-type clutch and the timing of indication；

Figure 45-48 shows the indication letter for describing speed changer fluid torque-converter or modeling for speed changer fluid torque-converter Number.

Specific embodiment

The present invention relates to the power trains of control hybrid vehicle.As shown in Figure 1-3, the hybrid vehicle may include Engine and motor.Power train integrated actuating machine/generator can be used or can not had to the engine during vehicle operation (such as motor or motor that DISG can be referred to as) operation.Power train integrated actuating machine/generator with engine crankshaft It is engaged on identical axis in power train and is just rotated whenever face of fluid torque converter rotation.Moreover, DISG can be with It engages to non preference the power train or is separated with the power train.But the DISG is the part of the one of the power train.Also Have, in the case where running or not running engine, the DISG can be run.The quality of the DISG when the DISG is not run Belong to the power train with inertia to provide or absorb the torque from the power train.

The power train can be run according to the method for Fig. 4.In some instances, which can be according to Fig. 5-10 Route and vehicle mass is driven to run.Engine can start according to method shown in Figure 11 to 18.Can as Figure 19-22 institute Show and power train part compensation is provided.As shown in Figure 23-28, fuel can be saved by selectively stopping engine.Such as figure The power train shown in 29A-36 can also enter regeneration mode, and wherein the kinetic energy of vehicle is transformed into electric energy.The subsequent electric energy can be with For pushing vehicle.As shown in Figure 37-40, during some situations, vehicle transmission system can enter sail mode, wherein starting Machine operation is not connected mechanically to DISG or speed changer or wheel still.As shown in Figure 41-44, power train disconnect-type clutch Operation is adapted to sexually revise (adapt).Method described herein can be used together executing a variety of methods simultaneously It is run in system.Finally, Figure 45-47 shows the indication function for describing transmission torque converter.

With reference to Fig. 1, with reference to Fig. 1, the internal combustion engine 10 --- Fig. 1 shows one of cylinder --- including multiple cylinders It is controlled by electronic engine control 12.Engine 10 includes that combustion chamber 30 and piston 36 are disposed therein and are connected to crankshaft 40 cylinder wall 32.Flywheel 97 and ring gear 99 are connected to crankshaft 40.Starter 96 includes pinion shaft 98 and pinion gear 95. 98 property of can choose of pinion shaft pinion gear 95 is promoted to engage ring gear 99.Starter 96, which can be directly mounted at, to be started Before machine or behind engine.In some instances, starter can selectively be mentioned to crankshaft via belt or chain For torque.Starter 96 can be described as low-power starter.In one example, it is started when not engagement engine crankshaft Machine 96 is in basic status.Combustion chamber 30 is shown pass through corresponding inlet valve 52 and exhaust valve 54 and inlet manifold 44 and exhaust Manifold 48 is connected to.Air inlet and exhaust valve can each be run by admission cam 51 and exhaust cam 53.The position of admission cam 51 It can be determined by admission cam sensor 55.The position of exhaust cam 53 can be determined by exhaust cam sensor 57.

Fuel nozzle 66 is shown positioned to inject fuel directly into cylinder 30, to those skilled in the art Here it is usually said direct injections.Alternatively, fuel can be ejected into air inlet, to those skilled in the art Here it is usually said tuned port injection.Fuel nozzle 66 is proportional to the pulse width of signal FPW from controller 12 Ground provides liquid fuel.Fuel is by including that the fuel system (not shown) of fuel tank, petrolift and fuel rail (not shown) provides To fuel nozzle 66.66 running current of fuel nozzle is supplied from the driver 68 of response controller 12.In addition, 44 quilt of inlet manifold It shows and is connected to optional electronic throttle 62, which adjusts the position of throttle plate 64 to control from air inlet 42 arrive the air stream of inlet manifold 44.In one example, the direct spraying system of low pressure can be used, wherein fuel pressure can rise Height arrives 20-30 bars.It alternatively, can be with high pressure, duplex fuel system to generate higher fuel pressure.In one example Air throttle 62 and throttle plate 64 can be set between inlet valve 52 and inlet manifold 44, so that air throttle 62 is air inlet section Valve.

88 response controller 12 of distributorless ignition system is that combustion chamber 30 provides pilot spark by spark plug 92.It is general The upstream that exhaust oxygen (UEGO) sensor 126 is illustrated in catalytic converter 70 is connected to exhaust manifold 48.Alternatively, bifurcation Exhaust gas oxygen sensor can replace UEGO sensor 126.

Converter 70 may include multiple catalyst bricks in one example.In another example, each tool can be used There are multiple Emission Control Devices of muti-piece brick.Converter 70 can be three-way catalyst, particulate filter, dilute NOx trap, Selective reduction catalyst or other Emission Control Devices.Tapping equipment heater 119 also can be set exhaust system with Thermal conversion device 70 and/or exhaust.

Controller 12 is shown as conventional microcomputer in Fig. 1, comprising: microprocessing unit 102, input/output Port 104, read-only memory 106, random access memory 108, keep-alive memory 110 and conventional data/address bus.Controller 12 are shown to receive the various signals from the sensor for being connected to engine 10, other than those discussed above signal, Further include: the engine coolant temperature (ECT) from the temperature sensor 112 for being connected to coolant jacket 114；It is connected to acceleration Device pedal 130 is used to detect the position sensor 134 of the power and/or position that are applied by foot 132；Brake pedal 150 is connected to answer For detecting the position sensor 154 of the power and/or position that are applied by foot 152；It is passed from the pressure for being connected to inlet manifold 44 The measurement of the engine manifold pressure (MAP) of sensor 122；Carry out the hair of the hall effect sensor 118 of 40 position of self-test crankshaft Engine position sensor；From sensor 120(for example, hot wire air flowmeter) the air quality into engine survey Amount；And the throttle position measurement from sensor 58.Can also sense atmospheric pressure (sensor is not shown) for by Device 12 is managed to handle.In the optimization of the present invention, predetermined quantity is generated for each forwarding engine position sensor 118 of crankshaft Pulse at equal intervals, can determine the speed (RPM) of engine from the number of pulse.

In some embodiments, engine can connect in the electric motor of Fig. 2 and hybrid vehicle shown in Fig. 3/ Battery system.Moreover, in some instances, it can be using other engine structures, for example, diesel engine.

During operation, each cylinder in engine 10 usually carries out four stroke cycles: the circulation includes air inlet punching Journey, compression stroke, expansion stroke and exhaust stroke.During induction stroke, it is however generally that, exhaust valve 54 is closed and inlet valve 52 It opens.Air is introduced into combustion chamber 30 via inlet manifold 46, and piston 36 moves to cylinder foot to increase combustion chamber Volume in 30.In piston 36 close to cylinder foot and at the end of its stroke (for example, when combustion chamber 30 holds in its maximum Product) position be usually called lower dead center (BDC) by those skilled in the art.During compression stroke, inlet valve 52 and exhaust valve 54 all close.Piston 36 is moved towards cylinder cover so as to the air in compression and combustion room 30.At its stroke end at piston 36 And usually it is called closest to the position of cylinder cover (for example, when combustion chamber 30 is in minimum volume) by those skilled in the art Stop (TDC).During being called injection behind, fuel is introduced into combustion chamber.During being called igniting behind, spray The fuel penetrated is ignited by the known device of such as spark plug 92, causes to burn.During expansion stroke, the gas of expansion Piston is pushed back into BDC.The movement of piston 36 is converted into the rotating torques of rotary shaft by crankshaft 40.Finally, in exhaust stroke Period, exhaust valve 54 are opened so that burned air fuel mixture is discharged into exhaust manifold 48 and piston back to TDC. It should be pointed out that being described above as just an example, and the opening and/or closure timings of air inlet and exhaust valve can become Change, for example, providing, positive or negative valve overlap, retarded admission door is closed or various other examples.

Fig. 2 shows the block diagrams of the vehicle transmission system 200 in vehicle 290.Power train 200 can be provided dynamic by engine 10 Power.Engine 10 can be started with engine starting system shown in FIG. 1 or DISG240.Moreover, engine 10 can produce Torque adjusts torque by the rotary torque 204 of fuel nozzle, air throttle etc..

Engine output torque can pass to the input side of double mass flywheel 232.Engine speed and double quality fly Taking turns input side position and speed can determine via engine position sensor 118.Double mass flywheel 232 may include for subtracting The spring and separated quality (not shown) of small drive train torque interference.The outlet side of double mass flywheel 232 is shown mechanically It is connected to the input side of power train disconnect-type clutch 236.Power train disconnect-type clutch 236 can be with electric actuation or hydraulic cause It is dynamic.The power train disconnect-type clutch side of double mass flywheel 232 is arranged in detect double mass flywheel 232 in position sensor 234 Output position and speed.In some instances, position sensor 234 may include torque sensor.Power train separate type from The downstream side of clutch 236 is shown to be connected mechanically to DISG input shaft 237.

DISG240 can be run so that torque is supplied to power train 200 or drive train torque is transformed into and will be stored in Electric energy in energy accumulating device 275.DISG240 has the power output of the starter 96 greater than Fig. 1.Moreover, DISG240 is straight Connecing driving power train 200 or being transmitted is 200 to directly drive.There is no belt, gear or chain that DISG240 is connected to transmission System.But DISG240 and power train 200 are with the rotation of identical rate.Energy accumulating device 275 can be battery, capacitor Or inductor.The downstream side of DISG240 is connected mechanically to power train disconnect-type clutch 236.

Torque converter 206 includes turbine 286, has output torque to input shaft 270.Input shaft 270 is by hydraulic moment changeable Device 206 is connected mechanically to automatic transmission 208.Fluid torque-converter 206 further includes torque converter bypass lock-up clutch 212 (TCC).When TCC is locked, torque is directly passed to turbine 286 from pump impeller 285.TCC is electrically operated by controller 12.It can Alternatively, TCC can be locked hydraulically.In one example, torque converter can be called the component of speed changer.Torque transfer Device pump impeller speed and position can be determined via sensor 238.Torque transmission turbine speed and position can be via sensors 239 determine.In one example, 238 and/or 239 torque sensor or combined position and torque sensor be can be.

When torque converter clutch 212 is fully disconnected, via transformer turbine 286 and face of fluid torque converter Fluid transmission between 285, motor torque is passed to automatic transmission 208 by fluid torque-converter 206, thus, it is possible to realize Torque increases.On the contrary, when torque converter clutch 212 is sufficiently engaged with, engine output torque via fluid torque-converter from Clutch is transferred directly to the input shaft 270 of speed changer 208.Alternatively, torque converter clutch 212 can partly connect It closes, it is thus possible to which the amount of torque for being directly passed to speed changer is adjusted.Controller 12 can be configured to various by responding Engine operating condition is adjusted according to torque converter clutch 212 is adjusted based on the engine service requirement of driver by fluid power The amount of torque that torque-converters 206 transmits.

Automatic clutch 208 includes engagement sleeve (such as gear 1-6) 211 and forward clutch 210.Engagement sleeve 211 and 210 property of can choose of forward clutch engage to push vehicle.The torque exported from automatic clutch 208 in turn can To be passed to wheel 216 via output shaft 260 to push vehicle.Output shaft 260 is by the torque from speed changer 308 via packet The differentiator 255 for including first gear 257 and second gear 258 passes to wheel 216.By output driving torque transfer to wheel Before 216, automatic transmission 208 can transmit the input driving torque in input shaft 270 in response to traveling state of vehicle.

Moreover, frictional force can be applied to wheel 216 by engaging wheel friction brake 218.In one example, may be used Wheel friction brake 218 is engaged to respond driver for its foot brake pedal (not shown).In other examples, it controls Device 12 processed or the controller for being connected in controller 12 can apply engagement wheel friction brake.By responding driver from braking Pedal unclamps its foot and unclamps wheel friction brake 218, can reduce the frictional force to wheel 216 in an identical manner.And And friction can be applied to wheel 216 by controller 12 as a part of vehicle brake of engine automatic stop process Power.

Lubricating oil pump 214 can be in fluid communication with automatic clutch 208 with generate it is hydraulic engage various clutches, such as before Into clutch 210, engagement sleeve 211, and/or torque converter clutch 212.For example, lubricating oil pump can 214 can be according to liquid Power torque-converters 206 is run, and can be driven by axis by the rotation of engine or DISG.Therefore, when engine speed and/ Or DISG speed increase when generated in lubricating oil pump 214 it is hydraulic can increase, and work as engine speed and/or DISG speed It can be reduced when reduction.

If Fig. 1 is shown in detail, controller 12 can be configured to receive the input from engine 10, and therefore control The operation of the torque output and/or fluid torque-converter, speed changer, DISG, various clutches and/or various brakes of engine. As an example, motor torque output can by adjust spark timing, fuel pulse width, fuel impulse timing, and/or into The combination of gas passes through control air throttle opening and/or valve timing, valve stroke and turbocharged engine or pressurization of unloading The pressurization of engine controls.In the case of diesel engines, controller 12 can be by controlling fuel pulse width, fuel Pulse timing and air inlet export to control motor torque.In all cases, engine control can be according to cylinder one by one It carries out to control motor torque output.As is known in the art, controller 12 can also by adjust flow to DISG around The electric current of group and torque output and electric energy production of the current control from DISG flowed out from DISG winding.

When idle stop situation is satisfied, controller 12 can be started by the fuel and spark for cutting off to generator Engine is shut down.But engine can continue to rotate in some instances.Moreover, in order to keep the torque capacity in speed changer, The rotating element of speed changer 208 can be grounded to the shell 259 of speed changer by controller 12, and thus be grounded to vehicle vehicle Frame.Specifically, controller 12 can engage one or more transmission clutch, for example, forward clutch 210, and will The transmission clutch (multiple clutches) of the engagement is locked in case of transmission 259 and carriage frame, as United States Patent (USP) Shen It please No.12/833,788 " METHOD FOR CONTROLLING AN ENGINE THAT MAY BE AUTOMATICALLY STOPPED(can be in the method for self-braking engine for controlling) " disclosed in, its content passes through for all purposes Reference is hereby incorporated by.Transmission clutch pressure can change (for example, increase), to adjust the joint shape of transmission clutch State, and desired transmission torque amount is provided.

Wheel-activated pressure can also be adjusted according to transmission clutch pressure between engine shut-down, to assist to constrain (tying up) speed changer, while reducing the torque transmitted by wheel.Specifically, one is locked simultaneously by application wheel braking The transmission clutch of a or more engagement can apply opposite power to speed changer, and therefore apply phase to power train Anti- power, thus transmission gear is kept to dive in active engagement state and the torque on transmission gear train (transmission mechanism) Can, without mobile wheel.In one example, between engine shut-down adjustable wheel brake pressure to coordinate wheel system Dynamic application is locked with the transmission clutch engaged.Therefore, by adjusting wheel brake pressure and clutch pressure, starting Keep the amount of torque in the transmission adjustable when machine is shut down.

Controller 12 can pass through weight when restarting situation is satisfied and/or when vehicle operators want to start vehicle The new burning started in cylinder reactivates engine.As reference Figure 11-18 further description, engine can be used Various modes start.

Vehicle 290 can also include preceding windscreen heater 294 and rear windshield glass heater 292.Windscreen adds Front and back windscreen 295 and 293 that is that hot device 294 and 292 can be electricity operation and being embedded in vehicle is interior or is connected to front and back wind Shelves glass 295 and 293.Vehicle 290 can also include driver run vehicle 290 when driver can see or can not The lamp 296 seen.Vehicle 290 can also include the fuel for supplying the electric operation of fuel to engine 10 under the situation of selection Pump 299.Finally, vehicle 290 may include the selectively surrounding air heat supply to 290 outside of air or vehicle in compartment Electric heater 298.

Referring now to Figure 3, Fig. 3 shows the second example vehicle powertrain arrangement.Many elements and biography in power train 300 Dynamic is that the element in 200 is similar and use is identically numbered.Therefore, for simplicity, identical between Fig. 2 and Fig. 3 The description of element be omitted.The description of Fig. 3 is limited to the element different from the element of Fig. 2.

Power train 300 includes double clutch-twin countershaft transmission 308.Speed changer 308 is substantially the hand of automatic running Dynamic speed changer.Controller 12 runs first clutch 310, second clutch 314 and shift mechanism 315, between gear 317 (for example, first to fifth speed) is selected.Play open and close to 314 property of can choose of first clutch 310 and second clutch It closes with the gear shift between gear 317.

The system of Fig. 1-3 may include torque sensor, which is the basis for adjusting power train operation. Alternatively, when torque converter clutch 212 is fully disconnected, fluid torque-converter itself may be used as torque sensor.Tool Body says that the torque output of the fluid torque-converter of opening is the function for outputting and inputting speed, pump impeller and turbine trip speed, wherein fluid power The turbine output of pump impeller input and fluid torque-converter in torque-converters.In the application of Fig. 2 and 3, pump impeller speed is equal to measurement DISG speed because DISG pump impeller output shaft is that pump impeller input shaft and turbine trip speed are measured and are used in speed changer clutch In the control of device control.

In addition, the given fluid torque-converter opened outputs and inputs speed characteristics, the torque of the fluid torque-converter of opening Output can control face of fluid torque converter speed by the function as transformer turbine speed to control.The DISG can To control transformer turbine speed with velocity feedback mode operation.Such as the DISG speed of order is (with fluid torque-converter Pump impeller speed is identical) be transformer turbine speed function.The DISG speed of the order can be determined as the DISG speed Function with both turbine trip speeds is to provide desired torque in fluid torque-converter output.

The interference of the power train in the system of Fig. 1-3 can also be reduced by power train disconnect-type clutch.A kind of example side Front opening torque converter clutch of the method in actuating power train disconnect-type clutch.For example, in vehicle regenerative formula braking conditions Period and/or when vehicle starts to stop and engine is shut down, power train point can be opened when engine is command by shutdown From formula clutch

In another example, during regenerative brake, power train disconnect-type clutch can be open, engine Can be stopped and fluid torque-converter can be locked to increase can in DISG240 absorbed braking moment. After engine shut down, power train disconnect-type clutch stays open, until engine restarting procedure starts.Starting During machine restarts, which can be partly closed to start rotation engine direct into cylinder Until first combustion incident.Alternatively, which can partly be closed until the burning in cylinder Engine reaches scheduled speed after event starts.Once engine combustion fully restarts and engine and transmission Be that disconnect-type clutch speed is substantial access to after (for example, in threshold value RPM value), the power train disconnect-type clutch capacity by Gradually change to being closed and remain without sliding/skidding/slippage (slip).The phase is gradually changed in power train disconnect-type clutch Between, torque interference is likely to occur in the output of power train disconnect-type clutch.Therefore, from open fluid torque-converter or torque The torque feedback of sensor can be the basis for adjusting the setting of DISG speed.It can be permitted with speed control mode operation DISG Perhaps desired torque value can more consistent ground maintained until power train disconnect-type clutch is closed completely until.It is separated in power train After formula clutch closure, torque converter clutch (TCC) can (such as TCC can be according to adding according to locking scheduled plan Speed pedal position and car speed actuating) it is locked.

In this way, before engine restarting procedure starts, torque converter clutch can be fully opened. The torque fluid torque-converter clutch after engine has restarted and power train disconnect-type clutch has been closed completely Device can be closed.In addition, the pressure to power train disconnect-type clutch is known in power train disconnect-type clutch in closure (since it is by control order) and thus obtain estimation average power train disconnect-type clutch torque.In order into The enhancing operation of one step, the estimation of this power train disconnect-type clutch torque or capacity can be used as anti-to DISG by controller The feedforward input of speed control is presented, interferes injection response to improve.It is then based on the power train disconnect-type clutch of torque estimation The capacity of torque can be used as the input to the inside torque feedback circuit in motor (DISG) and add.When DISG is in speed When spending in feedback model, which can be the inside stream circuit on the basis of the response for improving DISG.

In this way, a kind of that there is powertrain (such as the power transmission described in Fig. 2-3 for running System) the exemplary method of vehicle be included in that vehicle stops or speed is lower than threshold value, and in engine stop and power train separates First in the case that formula clutch is opened runs.Secondly, in the case where fluid torque-converter does not lock completely, this method packet It includes, such as threshold quantity is increased above according to the input of operator's pedal, receive request to start vehicle.In response, it is passed in closure One of them of engine DISG240 and starter or more when being disconnect-type clutch is moved to rotate and start, then Once in the case where fluid torque-converter is still closed.During this operation, from fluid torque-converter input/output speed Torque feedback is used to estimate the torque on axis 241, this torque is compared with desired torque value and it is provided to place In the adjusting of the speed setting of the DISG240 of speed control mode.For example, speed setting can be estimating in drive shaft 241 The adjustment parameter of the torque error of direction zero between torque survey and desired.

Other than operation above, additional control action can be taken, passes through (lash especially with regard to gap Crossing).For example, when vehicle is in regeneration mode in the case where engine stop (closing), when driver steps on acceleration When device pedal, from negative torque conversion to positive torque, engine is activated the power train, and power train disconnect-type clutch closes It closes, wherein all these movements are coordinated so as to the smallest torque interference of wheel introduction.Under the situation of selection, becoming Fast device 208 carries out these movements when being maintained at fixed gear (for example, not changing speed changer shelves).But the starting of engine This interference can be generated with passing through for gap.Therefore, in the transition period, the drive train torque can gap pass through period from Then small negative direct torque arrives desired torque to small positive torque.But this motor torque limitation can draw Into the delay provided in driver requested torque, when being added to the delay of starting engine, this torque delay can cause Sizable driver's is discontented.

In one approach, the capacity of fluid torque-converter bypass clutch 212 and the association of DISG240 output be can use It adjusts.For example, the timing for changing DISG from direct torque to speed control can restart situation with engine and conversion passes through Interstitial area alignment, to reduce the interference as engine start and caused by the interstitial area to power train.

In one example, provide the operation for following situation: driver applies braking and vehicle is in regeneration mould In formula, engine is shut down, and power train disconnect-type clutch fully opens, and DISG absorbs torque.Desired by the DISG is generated Braking moment level (and the electric energy generated is stored in battery, such as).During these situations, power train is subjected to negative torque And torque converter clutch 212 is locked.It can be increased in the amount of the negative torque of DISG and be applied by the power train Just increased regeneration.The amount of the negative torque can be based on the desired wheel braking torque for current working.Negative braking It can be based on the degree for the braking that driver is manipulating.But it loosens the brake and accelerator pedal two in operator Negative braking can also occur when person.

When driver's release brake (if application) and bend the throttle, vehicle is transformed into have and provide It is required that level of torque positive drive system torque engine operate operation.It points out as mentioned above, in this transition period Between, no transmission gear variation in the case where, torque pass through zero-turn square (interstitial area) and engine start rotation and Starting.Inventors herein have recognized that engine start rotational torque is interfered in the upstream of clutch 212, but gap is dry It disturbs in the downstream of clutch 212.The capacity of clutch 212 can be interfered with the speed coordination of DISG with reducing these power trains.

For example, TCC212 capacity can be reduced to the sliding for being enough to allow control when regenerative torque reduces.This operation It can assist power train from engine start rotational torque interference and insulation.When DISG regenerative torque is from current value towards zero-turn square When mobile, power train can be from big negative torque drop to close to zero-turn square.Close to zero-turn square, which can enter gap Area.Then the control of DISG is transformed into speed control mode from torque control model, and by face of fluid torque converter speed (Ni) it adjusts to higher than the transformer turbine speed (Nt).

This mode for adjusting face of fluid torque converter speed provides small positive torque and is subtracted during crossing interstitial area Few interference to power train related with the interstitial area is crossed.Desired DISG speed can be increased to provide torque simultaneously to wheel And some vehicles are provided and are accelerated.The estimation of amount of torque required for rotating to engine start can be determining by controller, with Feedforward DISG torque command is provided.When power train disconnect-type clutch combines and engine is started rotation, the feedforward DISG torque command can reduce the interference of the speed in fluid torque-converter from pump impeller.The adjustable power train disconnect-type clutch Capacity with reduce power train interference.Once engine has been started up and after power train disconnect-type clutch closure, start Machine may switch to direct torque and provide desired torque.

As the system about Fig. 1-3 is described in the upper surface of herein, for example, being caused when power train disconnect-type clutch Torque interference can occur when dynamic.Torque interference can lead to the driving performance and NVH that are deteriorated.For example, in power train separate type Torque interference in clutch output is (for example, being slided or ordered due to clutch actuation error or clutch grab and real Error between the motor torque on border) it can be used as transmission clutch state (for example, such as according to pressure or slip ratio The degree of engagement of power train disconnect-type clutch) and transmission gear ratio function transfer to speed changer input and be transferred to vehicle Wheel.

It can be the function of three-phase current in some instances by the torque that DISG240 is generated.In DISG output shaft 241 Torque the sum of is DISG output torque and inputs in the torque of the DISG or motor.The DISG can be controlled by powertrain Module (for example, controller 12) is ordered or is run with velocity feedback mode or with torque mode.The controller provides order Speed or torque.The controller or converter utilization or DISG velocity feedback or DISG current feedback are to generate desired speed Degree or torque.

For example, DISG torque can be according to DISG speed and electric current from the value for including empirically determined DISG torque Function or table output.DISG output in some structures is connected to launch clutch, is changing before being transferred to wheel It is adjusted during shelves event, to shape DISG output or smooth out DISG output.In another kind application, DISG output is used Lock-up clutch is connected to fluid torque-converter 206.Using launch clutch replace fluid torque-converter structure in, this start from Clutch is likely to become problem in the ability that low torque level accurately, rapidly controls clutch torque.For example, launch clutch It may be slided in the torque capacity output for adding DISG there are engine.Therefore, launch clutch can be configured to have high turn Square capacity.But low turn be likely to be used during engine restarting and during vehicle starts from zero and/or low speed Under square is horizontal, it is highly difficult for controlling to fine cut the launch clutch.

For adjusting or controlling a kind of method of launch clutch using being mounted on the launch clutch input shaft Torque sensor.The magnetosphere of forming is placed on the launch clutch input shaft by sensor installation, is generated and is turned with axis The proportional voltage output of square.The voltage is read by noncontacting proximity sensor (multiple sensors) and detection system.Carry out self-torque The signal of sensor appears in power train point to eliminate in can be used to closed circuit torque feedback mode operation DISG Torque interference from formula clutch output (DISG input).If automatic transmission utilizes hydraulic moment changeable in speed changer input Device, torque sensor may be mounted on fluid torque-converter input shaft.The fluid torque-converter input torque sensor can be used Feedback is provided in DISG controller, is interfered with excluding the torque transmitted by power train disconnect-type clutch.

As described herein, engine can shut down (and power train disconnect-type clutch is opened), as behaviour Author reduces fuel consumption when unclamping accelerator pedal.Therefore, when vehicle starts to stop or is enough working as from the torque of DISG Accelerating vehicle or another other times for overcoming road load, engine are shut down.When operator using accelerator pedal and When desired torque is more than the torque that the DISG is capable of providing, engine is restarted to supplement DISG output torque.In addition, such as Fruit battery charge state descends below minimum threshold, and engine can restart under coast situation.Engine can To restart to provide the torque of positive drive system and provide torque so that DISG can be run as generator, to give battery Charging.In engine restarting procedure, according to operating condition described herein or power train disconnect-type clutch or individually Starter can be used to start rotation engine.After once burning starts within the engine or engine it is accelerated with The input speed or power train disconnect-type clutch for matching DISG engage/slide through control clutch pressure and controlled To push engine direct to DISG input speed.When power train disconnect-type clutch closure, in power train disconnect-type clutch There may be big torque interference, which interferes and then passs DISG output for output.Torque interference can potentially pass to change Fast device output and wheel, thus be that drivability can be deteriorated with NVH.

Various methods can be used to reduce the influence of this engine restarting torque interference.Such as it retouches herein The method stated.Alternatively, or in addition, it is exported in power train disconnect-type clutch and reduces engine restarting torque interference A kind of method of amplitude be to make engine start velocity of rotation and power train point before power train disconnect-type clutch closure From the output of formula clutch or DISG(because both by axis connection) speed matches.This method utilizes power train separate type Clutch output torque and power train disconnect-type clutch speed difference relationship.Specifically, power train disconnect-type clutch output turns The symbol (sign) that square outputs and inputs speed difference by power train disconnect-type clutch effectively increases.For example, it is approximatively Equal to the symbol (crankshaft speed-DISG speed).The speeds match is closer, and power train disconnect-type clutch output torque is got over It is low,

When this method can be used to reduce the interference of power train disconnect-type clutch output torque, it is run to accelerate to send out Motivation speed is to power train disconnect-type clutch output speed.The power train disconnect-type clutch output speed can from 750 to 3000RPM variation.Engine, which is accelerated to this range, can postpone the engine start being powered and respond driving Member's steps on accelerator pedal.Such as it is not mentioned until power train disconnect-type clutch closure, the engine or in speed changer output For torque or as drag effect, (for example, if crankshaft speed is less than DISG speed, then power train disconnect-type clutch is defeated Torque is negative out).If driver steps on accelerator pedal (for example, stepping on accelerator pedal) and DISG in current DISG Speed does not have enough torque capacities, may not be able to then provide desired torque until power train disconnect-type clutch no-load voltage ratio And engine is capable of providing positive torque.

Therefore, in some cases, may desire to push engine speed to DISG using power train disconnect-type clutch Speed, to be quickly closed power train disconnect-type clutch and provide positive motor torque in DISG output.In engine plus The difficulty of closure power train disconnect-type clutch is that the torque exported in power train disconnect-type clutch is when speed is to DISG speed The function of symbol (crankshaft speed-DISG speed).If DISG is used to accelerate crankshaft and double mass flywheel inertia, then, hair Motivation burning torque and the difference being applied between the DISG torque for realizing given acceleration level are appeared in as negative torque Then sudden change symbol is positive torque when crankshaft (or double mass flywheel output) is more than the DISG speed by DISG output.

The variation of power train disconnect-type clutch output torque can input to form torque peak in DISG, the torque peak Speed changer input and/or wheel can be transferred to.Therefore, DISG can be used as the operation of torque interference rejection apparatus and be started with reducing Machine restarts torque and increases.It is DISG output torque and power train disconnect-type clutch output torque in the torque of DISG output The sum of.The control of DISG can based on power train disconnect-type clutch output, DISG output, fluid torque-converter export, And/or one or more detections in the torque interference of speed changer output.Torque sensor can enable DISG straight Run in except torque is interfered.This Torque test can be provided by Non-contact speed-changing device shaft torque sensor.

If sensor is applied to the axis between power train disconnect-type clutch and DISG pump impeller, the torque of the detection can To be the input of DISG control, engine restarting power train disconnect-type clutch output is eliminated to form opposite torque Torque peak.Alternatively, the axis between the DISG rotor and fluid torque-converter (or pump impeller) can be set in torque sensor On.In such an example, the inertia of DISG rotor and acceleration are included in interference elimination torque calculation and are interfering It excludes to be taken into account in torque calculation.Furthermore, it is possible to using speed changer input or output shaft torque, sensor.If speed changer is defeated Shaft torque sensor is applied, then interference elimination torque item may include to speed changer inertia and selectively clutch state Compensation.

Referring now to Figure 4, Fig. 4 shows the flow chart of the exemplary methods of the method operation vehicle transmission system with Fig. 5-47. The method of Fig. 4 and subsequent method can be stored in the non-transient of controller 12 as shown in Figs. 1-3 as executable instruction In memory.Moreover, T such as shown in Fig. 10₀-T₈Various marks indicate below shown in correlation time in sequence.

402, method 400 determines operating condition.Operating condition can include but is not limited to torque-demand, engine speed, engine Torque, DISG speed and torque, car speed, environment temperature and pressure and battery charge state.Torque-demand can be with It is inferred to from its pedal 130 of the acceleration of Fig. 1 and control 12.Method 400 proceeds to 404 after operating condition is determined.

404, method 400 adjusts power train operation and operating parameter according to the method for Fig. 5-8.Specifically, 400 sound of method Travel path situation and/or driving behavior is answered to adjust power train operation.At the rear for adjusting power train operation and operating parameter Method 400 proceeds to 406.

406, method 400 adjusts power train or the powertrain operation for vehicle mass shown in Fig. 9 and 10.? In one example, vehicle mass can be responded and adjust the timing and situation for being used for engine stop, allow to reduce power train The number of abrasion and power train disconnect-type clutch state change.The rear being conditioned is run in the power train for vehicle mass Method 400 proceeds to 408.

408, method 400 judges whether engine wishes to start.Engine start can require engine by having Starting and/or the unique feature operation person's key or button input requirements stopped.Alternatively, restart can basis for engine Operating condition is required automatically by controller 12, which does not include that driver's operation has and requires the unique of engine stop or starting The device of function.For example, controller 12 can require engine response driver to unclamp vehicle brake pedal or response battery State of charge requires engine start.Therefore, the requirement to restarting engine can be by having in addition to sole requirement The input of function except engine start starts.If 400 determination requirement engine of method restart, method 400 into It goes to 410.Otherwise, method 400 proceeds to 418.

410, method 400 selects the device for starting engine, as described in Figure 11 and 12.In an example In, engine can be started by the starter with the power output lower than DISG.In another example, with lower The starter of power keeps engine when dead status that can start by DISG.The method after selecting engine starting gear 400 proceed to 412.

412, method 400 adjusts the fuel injection of one or more direct fuel nozzles to generator supply fuel Timing, as shown in Figs. 13 and 14.Fuel injection timing is adjusted to provide single or multiple fuel spray during single cylinder cycle It penetrates.By adjusting fuel injection timing, engine speed curve accelerates (such as from starting velocity of rotation (for example, 250RPM) Engine accelerates) arrive desired engine idle speed.Method 400 proceeds to 414 after adjusting engine timing.

414, method 400 judges whether engine start is related with shifting of transmission.For example, method 400 judges whether Wish to start engine according to the gear shift from a speed changer shelves to another speed changer shelves.If root is wished in the judgement of method 400 Start engine according to shifting of transmission or scheduled shifting of transmission, then method 400 proceeds to 416.Otherwise, method 400 carries out To 418.

416, method 400 starts engine during shifting of transmission, as shown in figures 15-18.In one example, exist Engine can be started during gear shift before engagement sleeve is opened or is closed.After the engine is started method 400 into It goes to 418.

418, method 400 provides double mass flywheel (DMF) compensation.Moreover, method 400 can provide power train separate type Clutch compensation.DMF compensation can be weakened by control DISG torque and/or speed and power train disconnect-type clutch torque Torque across DMF is transmitted.As shown in figures 19-22, DMF compensation is provided.Method 400 proceeds to after DMF compensation starts 420。

420, method 400 judges whether to wish to stop engine rotation.Method 400, which may determine that, damps shape in low torque Wish to stop engine rotation under condition and/other situations.If method judgement wish stop engine rotation, method 400 into It goes to 422.If method judgement does not stop engine rotation, method 400 proceeds to 420.

422, method 400 adjusts engine stop curve (profile).In one example, in engine to zero-turn During speed, adjusts engine speed and to be desirable to restarting engine in the engine location of zero engine speed 's.As shown in Figure 23-26, adjustable engine stop curve.After having been selected or reconciling engine stop curve, side Method 400 proceeds to 424.

424, method 400 is remained operational for adjusting powertrain operation for ramp.In one example, it responds Vehicle road slope is selectively adjusted powertrain.After response vehicle road slope adjusts powertrain, method 400 proceed to and exit.

430, method 400 judges whether to wish through power train abrupt deceleration vehicle.When vehicle descending is or in other situations Period, method 400 may determine that hope provides vehicle braking by power train.If the judgement of method 400 is wished to pass through power train Abrupt deceleration vehicle, method 400 proceed to 432.Otherwise method 400 proceeds to 434.

432, method 400 adjusts DISG and engine is operable to power train and provides desired vehicle braking level, As shown in Figure 29 A-36.In one example, vehicle is provided via DISG when battery charge state (SOC) is less than threshold level Braking.Method 400 proceeds to 434 after providing vehicle braking via rotation system.

434, method 400 judges whether to enter or leave navigation (sailing) mode.In one example, mould is navigated by water Formula can be described as power train disconnect-type clutch open when engine to navigate by water idling speed (for example, combustion air and combustion Material) operation when.Navigation idling speed is lower than when engine combustion air-fuel mixture and power train disconnect-type clutch closes Engine idle rotational when conjunction.In addition, engine can be run while sail mode with Athkinson circulation pattern. Moreover, spark timing can be advanceed near or at minimum spark timing in some instances, it to be used for optimal engine torque (MBT).In one example, sail mode can be entered when DISG torque is in the predetermined range of threshold value DISG torque. If it is determined that wanting to enter into or exiting sail mode, method 400 proceeds to 436.Otherwise, method 400 proceeds to 438.

436, method 400 can run engine and driver with sail mode, and wherein engine is with effective operating condition It runs and power train disconnect-type clutch is opened while DISG provides torque to vehicle transmission system, as shown in figure 38.It can Alternatively, method 400 may exit off sail mode, as shown in figure 39.After coming into or leaving sail mode, method 400 proceed to 438.

438, method 400 judges whether to adjust the transfer function of power train disconnect-type clutch.In one example, side Method 400 judges whether change (adapt) during the situation of the selection during such as engine idling or engine stop situation The transmission function of power train disconnect-type clutch.If the judgement of method 400 is wished to adjust the transmission of power train disconnect-type clutch Function, then method proceeds to 444.Otherwise, method proceeds to 440.

444, method 400 adjusts or changes the transmission function of power train disconnect-type clutch, as shown in Figure 42-45.? In one example, power train disconnect-type clutch transmission function is inputted and is mentioned according to the torque to the power train disconnect-type clutch The pressure of the clutch is supplied (for example, the hydraulic fluid pressure of supply power train disconnect-type clutch or supply become power train separation The electric signal of formula clutch) torque transfer of the power train disconnect-type clutch is described.Adjusting or changing power train separate type Method 400, which proceeds to, after clutch transmission function exits.

440, method 400 runs engine and DISG and provides desired torque with the input to speed changer.Show at one In example, engine and DISG are run according to the drive train torque demand by driver and/or controller offer.For example, if The drive train torque of 35N-m is required at face of fluid torque converter, the DISG can while engine provides 25N-m for power train To provide the torque of 10N-m for power train.Alternatively, DISG or engine can provide whole 35N-m for power train.Start The operating condition of machine and/or DISG can be used for determining the torque output exported by engine and DISG.In engine and DISG After operational mode, speed and/or torque output, method 400 proceeds to 442.

442, method 400 adjusts engine and DISG torque to provide desired torque at face of fluid torque converter. In one example, the torque at face of fluid torque converter is estimated by torque sensor.In other examples, hydraulic moment changeable For estimating the basis of the torque at face of fluid torque converter when device operating status.The face of fluid torque converter torque is estimated such as Shown by Figure 21.The speed changer impeller torque of estimation is subtracted from desired speed changer impeller torque, to provide fluid torque-converter Impeller torque error.It responds face of fluid torque converter torque error and adjusts motor torque and/or DISG torque, to subtract towards zero Few face of fluid torque converter torque error.Method 400, which proceeds to, after adjusting drive train torque exits.

Referring now to Figure 5, Fig. 5 show be likely encountered during the traveling from a position to another position it is exemplary The schematic diagram of information.Information source shown in fig. 5 can be used for method shown in Fig. 6-8.Moreover, the information source and shown in fig. 6 Device can be used for system shown in Fig. 1-3.

In this illustration, vehicle 290 can be travelled in No.1 route 501 and No. two routes 502 respectively to the first purpose Ground and the second destination.Vehicle 290 may include solar recharging system 504, for being energy accumulating device shown in Fig. 2 275 chargings.The solar recharging system may include platform solar panels device relevant with other.In addition, vehicle 290 can wrap Include the inductive charging system 514 for charging for energy accumulating device 275 shown in Fig. 2.The inductive charging system 514 can be The charge of the energy from outside vehicle is received when vehicle is mobile.Vehicle 290 can also include being originated from outside vehicle 290 for receiving The receiver 503 of the signal in portion or inside.

No.1 vehicle route includes several information sources, target and can be for selectively running certain transmission pasterns The element on the basis of part.For example, vehicle 290 can receive the global positioning system (GPS) from satellite 505 in the process of moving Information.The GPS system can provide make processor 12 shown in FIG. 1 can determine along No.1 route road grade and away from From.Processor 12 is based on symbol or signal 506 during being also stored in driving process and vehicle stops related information, therefore When vehicle 290 is again in No.1 route running, the information can be obtained with determine when vehicle will stop, starting, Accelerate, slow down or is cruised with essentially identical speed (such as ± 5MPH).

Vehicle 290 can also be estimated during No.1 route running is supplied to energy by the sun 507 by solar energy system 504 Measure the quantity of electric charge of storage device 275.For example, if vehicle starts running No.1 road, 1 point of 1 watt/minute of generation in the afternoon, And it is expected that it will spend a hour in No.1 road driving, estimation will generate 60 watts during No.1 road driving. Moreover, the power of estimation generated in the process of moving is adjusted according to the weather of time and prediction in one day.For example, one The amount of electric power caused by it specific time can be pushed away based on the time in empirically determined solar watch and one day Know later by the amount of the electric power of generation.

Vehicle 290 is also recorded and stored in the condition of road surface 508 in memory or receiving the external source from such as GPS. Condition of road surface 508 may include road grade/class information, road surface information and rate limitation.Vehicle 290 can also be from temperature It spends sensor 509 and receives or measure environment temperature.Temperature sensor 509 is incorporated in vehicle 290 or can be located at vehicle 290 It is external.

Finally, vehicle 290 may be received in the electric power of power supply 510 in No.1 road.Power supply 510 can be from No.1 mesh Ground power grid be vehicle 290 provide power house or business power supply.Vehicle 290 can have the information of storage, packet Include storage database and/or from it is first drive to No.1 destination stores, instruction vehicle 290 can be in No.1 destination The information recharged.This information is for determining the electricity that is stored in vehicle 290 in the process of moving how using being to have ?.

In another example, vehicle 290 can be via No. two road drivings to No. two destinations.Vehicle 290 can be by It is programmed to recognize that it is travelled to No. two destinations.Along No. two routes, vehicle 290 can receive the day from infrastructure 515 Gas, road conditions, environment temperature and GPS data.Infrastructure can include but is not limited to radio broadcast towers and highway/road broadcast Equipment.Vehicle 290 may also receive from such as mobile phone, computer, small desktop device, and/or personal digital assistant The road conditions of handheld apparatus 513.In some cases, vehicle 290 can receive from by transceiver 512 provide information its The road conditions and destination information (for example, available charge station) of his vehicle 511.

Therefore, vehicle can start in traveling and entirely receive the basis that can be for controlling power train operation in traveling Information.For example, information source shown in fig. 5 can be for run power train disconnect-type clutch 236 shown in Fig. 2, The basis of DISG240 and engine 10.

Referring now to Figure 6, Fig. 6 is shown for responding the information encountered during travelling from a position to another position Run the flow chart of the method for hybrid powertrain.The method of Fig. 6 can be stored up as the instruction that can be performed in the system of Fig. 1-3 There are in non-transient memory.

602, method 600 determines vehicle working condition.Vehicle working condition can include but is not limited to engine speed, vehicle speed Degree, environment temperature, driver requested torque are (for example, via input by driver requested torque, and in some instances Desired drive train torque can also be called) and energy accumulating device SOC.Moreover, operating condition may include being inputted according to driver Or by by current travel route with during previously sailing used in path adaptation choose the road of destination.Determining work Method 600 proceeds to 604 after condition.

604, method 600 collects travel routes information.Method 600 can receive travel routes information, such as road slope Degree, traffic signals position, other car speeds, traffic spare space, charging station location, environment temperature and from various sources Traffic relevant information.Information source can include but is not limited to the internal storage of the controller in vehicle, hand-held personal device (for example, personal digital assistant, tablet computer, computer, phone), Microstar, infrastructure, other vehicles and traffic communication are set It is standby.In one example, the travel route of vehicle can be compared with being stored in the travel route in controller storage.If vehicle Present running route match the travel route that is stored in controller storage, row of the controller from storage in memory The route selection destination and driving condition (for example, traffic signals, road grade, electrically-charging equipment etc.) are sailed without driver Input.After capturing drive route information, method 600 proceeds to 606.

606, method 600 is prioritized to the chance that apparatus for storing electrical energy charges according to the travel route along selection and utilizes The electric energy of storage.Fig. 7 shows a kind of method for being prioritized the electric energy using storage.It is prioritized using the electric energy of storage and may include Selection vehicle acceleration period just with electric energy, so as to according to desired torque-demand simply by electric energy compared with, Reduce the use of hydrocarbon fuels.Moreover, priorization may include using the electric energy of storage, when vehicle distances are filled from outside The electric energy accumulating device can charge (for example, descending) by kinetic energy in scheduled distance, or in energy accumulating device During situation, the storage charging for substantially utilizing all available in apparatus for storing electrical energy to arrive is (for example, reduce energy storage dress Set the threshold quantity that charging drops to charging).Proceed to 608 using method 600 after being stored in electric energy being prioritized.With this side Formula, before vehicle reaches convenient for using the condition of road surface of the traveling of the electric energy of storage, the predetermined electric energy using storage of method 600 Plan.

608, method 600 is prioritized the charge to the energy accumulating device according to travel route by engine.For example, When energy accumulating device SOC is low, method 600 can run engine to push vehicle.Moreover, when method 600 is determined in vehicle During slowing down later using the kinetic energy of vehicle can charge to energy accumulating device the very short time when, method 600 can transport Row engine is without the energy accumulating device that charges.Fig. 8 shows a kind of method for being prioritized and charging to apparatus for storing electrical energy.In electricity Preferentially method 600 proceeds to 610 to the charging of energy storage device later.In this way, it reaches in vehicle and is stored convenient for electric energy Before the travel of device charging, the plan of method 600 is charged to apparatus for storing electrical energy.

610, method 600 is prioritized the entrance of power train sail mode according to the travel route of vehicle.In an example In, method 600 determines when that vehicle is expected from 702 index informations of method 700 and stops less than threshold amount of time.And And method 600 can receive and stop being expected to accelerate to less than the rear vehicle of threshold amount of time having higher than threshold rates with vehicle The information of pass.Method 600 plans the entrance of sail mode (for example, engine is in idling, power train according to the position of travel route Disconnect-type clutch is opened, and DISG provides the torque of requirement for vehicle transmission system), wherein vehicle is expected stopping less than threshold The time quantum of value, and wherein vehicle is expected the rate acceleration for being greater than threshold rates from vehicle stopping.It is carrying out into boat Method 600 proceeds to 612 after the plan of row mode.In this way, row is reached in vehicle sail road convenient for sail mode The plan of method 600 enters sail mode before situation

612, method 600 is according to the scheduled of the electric energy being stored in energy accumulating device and preferential use, electric energy Storage device runs power train disconnect-type clutch, DISG and hair via the preferential charge of engine and entering for sail mode Motivation.In other words, method 600 can open and close transmission according to expected vehicle and along the condition of road surface of travel route It is disconnect-type clutch, operation DISG, and runs engine.For example, if method 600 exists in the route period project of traveling Specific to stop entering sail mode, then when vehicle stops at specific position, method 600 opens the clutch of power train separate type Device and enter sail mode.Moreover, DISG plan mentions when response is prioritized using the electric energy being stored in apparatus for storing electrical energy When for torque to accelerate the vehicle without assistance from engine, method 600 opens power train disconnect-type clutch.Also Have, responds vehicle and open power train disconnect-type clutch within the threshold range to store from electric energy before reaching charging station The energy of device is used to push vehicle rather than engine and hydrocarbon.It is arrived in addition, method 600 can respond vehicle Power train disconnect-type clutch is opened within the threshold range before up to downward grades.It is counted in the operation of power train disconnect-type clutch After drawing and being carried out according to vehicle and travel route situation, method 600 proceeds to 614.

614, method 600 judges whether travel route and/or vehicle condition have substantially change.Travel route and/or Substantially changeing for vehicle condition unexpected situation can occur (for example, extended vehicle stops or unexpected battery fills Electric loss) or there is no expected situation (such as not having vehicle stopping when expected vehicle stops).If the judgement of method 600 is sailed Route and/or vehicle condition have changed, and answer is "yes" and method 600 returns to 602, to determine preferential storage again Electric energy, energy device charging and sail mode is deposited to enter.Otherwise answering is "No", and method 600 proceeds to 616.

616, whether method 600 judges vehicle in the final destination of its traveling.In one example, method 600 compares Compared with the current location of vehicle and the destination of programming.In another example, method 600 compares current location and the expection of vehicle Destination.If method 600 judges vehicle in its destination, method 600, which proceeds to, to be exited.Otherwise method 600 returns to 614。

In this way it is possible to adjust hybrid powertrain according to travel route and along the situation of the travel route Operation.To the adjusting of hybrid powertrain can include but is not limited to opening and closing power train disconnect-type clutch, via Engine charges to energy accumulating device, into sail mode and enters and leaves other power train operational modes.

Referring now to Figure 7, Fig. 7 is shown for preferentially using the process of the method for the electric energy being stored in hybrid vehicle Figure.Chance of this method based on the electric energy using storage on travel route to apparatus for storing electrical energy to charge.The method of Fig. 7 is made It can be stored in the non-transient memory in the system of Fig. 1-3 for executable instruction.

702, method 700 determines the number that vehicle stops on travel route and its position and estimates to stop in vehicle The regeneration energy of apparatus for storing electrical energy is applied to during (such as during vehicle deceleration and descending) period and other chances.Method 700 can also estimate the amount to charge via the expected battery of solar recharging system.Moreover, method 700 is determined from stopping The estimation of the number of accelerating vehicle and the electric energy for stopping accelerating from each vehicle.In addition, when method 700 can be stored less than threshold value Between section vehicle stop information.

In one example, the number that vehicle stops and its position are according to information source determination as shown in Figure 5 along row Sail the traffic signals of route and/or the number estimation of mark.Specifically, in one example, vehicle stop number from along The traffic signals of travel route and/or the number of mark are multiplied by the reasonable percentage for indicating the practical traffic signals stopped of vehicle The value of (for example, 60%) determines.The number that the vehicle for being equal to estimation from the number for stopping accelerating stops.Stopping per this vehicle The amount of period regenerated energy can according to before the stopping car speed, road grade and vehicle mass (such as using E= 1/2mv², wherein E is energy, and m is vehicle mass, and v is car speed, or alternatively in entire time interval F=ma+ Mgsin (Θ), wherein m is vehicle mass, and a is vehicle acceleration, and g is acceleration of gravity, and Θ is to can be converted slope The road angle of degree) it calculates.Equally, the amount of the energy of accelerating vehicle can be according to rate limitation, road grade and vehicle mass To calculate (for example, in entire time interval F=ma+mgsin (Θ) or E=1/2mv²) and be then converted into electric energy. Moreover, the energy obtained along the route from solar energy or sensing device can be added to can obtain during travelling the route Total charge volume in.The number of traffic signals, its position and road slope information can be determined by information source shown in fig. 5. It is in vehicle stopping, the number of vehicle acceleration, energy regeneration and true in energy of the vehicle stop position for accelerating vehicle every time After fixed, method 700 proceeds to 704.

704, whether energy accumulating device is capable of providing after method 700 judges each vehicle stopping determined 702 Energy for accelerating vehicle to rate limitation.In one example, it is stored in the energy of energy accumulating device and along traveling The amount of the regenerated energy for the estimation that route can obtain is added together.Energy and regenerated energy of the Driveline losses from storage The sum of amount subtracts, and result is compared with the energy for the estimation for stopping accelerating vehicle from all vehicles.If from all The energy of the vehicle estimation that stops accelerating vehicle be greater than the energy and the sum of regenerated energy of storage, then can determine along row Sailing route engine auxiliary can be necessary, and energy accumulating device may be whole to complete without enough storage electric power A travel route.If energy accumulating device may not have enough electric power to add along the route of selection from all stoppings Fast vehicle, then answering is "No", and method 700 proceeds to 706.Otherwise answer is "yes" and method 700 proceeds to 708.

706, which acceleration of the selection of method 700 from self-stopping technology utilizes the energy from energy accumulating device to carry out. In other words, method 700, which is determined, will provide torque to power train in which vehicle acceleration period DISG.In one example, it selects The vehicle for selecting wherein DISG operation accelerates the amount based on the energy of which acceleration request from stopping when joined most closely Match the amount for the energy that can be obtained from energy accumulating device.For example, energy accumulating device stores the library X if started in traveling The charge of human relations, and the first two ten vehicle three times accelerate it is expected utilize X coulomb of energy, then the first two ten three times vehicle acceleration via DOSG and energy accumulating device provide.It should be noted, however, that the vehicle of selection accelerates necessarily have continuous sequence.But Accelerate to add from any via each secondary vehicle that DISG and energy accumulating device provide power during the vehicle route of plan Speed selection.

In another example, wherein DISG be used to run from the charge of energy accumulating device from vehicle stopping Accelerate based on when using from regenerated energy to charge to energy accumulating device and the expected storage when vehicle stops The amount of energy.For example, if it is anticipated that be only expected during vehicle deceleration a small amount of regeneration energy and vehicle stop when it is pre- The charging of phase energy accumulating device is less than threshold level, then not planning using DISG come from the specific stopping accelerating vehicle.At it After the acceleration from vehicle stopping that middle DISG is used to run from the charge of energy accumulating device is determined, method 700 is carried out To 716.

708, the determination of method 700 is not the mobile number and position accelerated of vehicle from vehicle stopping.Method 700 is also Estimate the amount in the energy of each move vehicle acceleration period accelerating vehicle.The mobile number and position accelerated of vehicle can be from row The variation for sailing the rate limitation of the whole process generation of route determines.Therefore, the number that move vehicle accelerates can be from traveling road Each increase in the limitation of line command speed determines.The variation of vehicle route speed can be stored in map data library and From memory index.Moreover, vehicle route can according between current vehicle position and the destination of requirement the shortest distance or Time determines.

Method 700, which is also determined, accelerates the energy of position accelerating vehicle in each vehicle.The energy of accelerating vehicle can basis Rate limitation, road grade and vehicle mass determine (for example, entire time interval F=ma+mgsin (Θ) or E= 1/2mv²).Accelerate position accelerating vehicle in the position that the mobile number accelerated, move vehicle accelerate and in each move vehicle Energy be determined after, method 700 proceeds to 710.

710, method 700 judges that energy accumulating device whether can after the mobile acceleration of each vehicle is determined 708 Energy is provided to rate limitation for accelerating vehicle.In one example, the amount for the energy being stored in energy accumulating device adds Along travel route estimate it is obtainable regeneration energy subtract 702 determine every time stop accelerating vehicle energy amount with The amount of the energy of position accelerating vehicle is accelerated to be compared in all move vehicles.If accelerating mobile vehicle in each position Energy amount be greater than from 702 surplus, can determine along travel route engine auxiliary be needed and Energy accumulating device may not have enough storage electric power to provide electric power over the entire course.If energy accumulating device is not Accelerate to carry out accelerating vehicle from all move vehicle along the route of selection with enough electric power, then it is "No" and square for answering Method 700 proceeds to 714.Otherwise, answer is "yes" and method 700 proceeds to 712.

712, method 700 selects the dump energy being stored in energy accumulating device during travel route and is regenerating Where the energy that period (for example, during vehicle deceleration) generates can be consumed.For example, if energy accumulating device has Higher than the threshold value of charging remaining X coulombs of charge and charging source can be obtained in the destination of vehicle, then method 700 is true It is scheduled on along where travel route consumes the remaining charge.In one example, it is stored in energy accumulating device simultaneously And the consumption for being not used to the remaining charge of accelerating vehicle starts to consume in the position based on destination.For example, if it is expected that vehicle By with Z coulombs of excess charge and every mile of vehicle utilizes 1/Z coulomb, power train disconnect-type clutch opening and DISG is starting Z coulombs of electric discharge, and engine stop from destination Z miles at a distance.In this way, method 700 can subtract The mode of few hydrocarbon fuels consumption reduces the energy being stored in energy accumulating device, because passing through consumption energy storage Charge drops to storage electric energy consumed by the threshold level (for example, minimum battery charge is horizontal) of charging and increases.Moreover, by It can be recharged in destination by power grid in vehicle, energy accumulating device can be with from the Charge Source more more efficient than engine Charging.

On the other hand, there is no charging source, power train disconnect-type clutch closure and energy in destination as method 700 is determined Apparatus for storing electrical energy can be still stored in amount.Determining where will be consumed in the unconsumed extra energy of vehicle acceleration period Later, method 700 enters 716.

714, which move vehicle is method 700 select the energy that will be used to from energy accumulating device is accelerated to carry out.Change sentence It talks about, method 700 determines which move vehicle accelerates (such as the vehicle acceleration for being not from stopping) period DISG will be to transmission System provides torque.In one example, wherein the vehicle of DISG operation accelerates to want based on which vehicle acceleration when joined for selection The amount for the energy asked most closely matches after being supplied with energy and being accelerated with the vehicle of accelerating vehicle from energy accumulating device energy The amount of the energy enough obtained.For example, if energy accumulating device stores X coulombs of charge, and self-stopping technology when travelling beginning 23 this vehicle risen accelerate it is expected using Y coulombic energy (for example, wherein Y is less than X), from stopping the first two ten three times plus Speed will be provided by DISG and energy accumulating device.If it is expected Z coulombs of residue after stopping accelerating vehicle every time, and move The sum of motor-car acceleration energy consumption is greater than Z coulombs, then the first time move vehicle acceleration for occupying Z coulombs of charges is provided the library Z Human relations charge.It should be noted, however, that the move vehicle for the selection that wherein extra charge is provided accelerates in the sequentially company of needing not be Continuous.Accelerate to receive that DISG is assisted and after charge from energy accumulating device selected, method 700 is carried out in move vehicle To 716.

716, the predetermined DISG of method 700 to the assistance of power train with based on determining acceleration position and stable state energy Amount use accelerate or keep vehicle move.At power train disconnect-type clutch in the open mode or during closed state DISG assistance can be provided.Moreover, DISG can provide completely or only only a part torque to push vehicle.

In this way it is possible to make a reservation for and be prioritized the electric energy using storage.In this illustration, from the vehicle of zero velocity Speed-up ratio move vehicle accelerates, or during cruising condition using the vehicle of the electric energy of storage accelerates to have higher preferential Power.

It is filled according to the route of traveling for making a reservation for or preferentially being stored via engine to electric energy referring now to Figure 8, Fig. 8 is shown Set the flow chart of the method for charging.The method of Fig. 8 can be stored in non-transient as the instruction that can be performed in the system of Fig. 1-3 In memory.

802, method 800 indexes 702 and 708 information from Fig. 7, to determine when apparatus for storing electrical energy quilt It is expected that needing to charge.Specifically, if determining that vehicle cannot accelerate from all zero velocity states the 702 of Fig. 7, method 800 can determine that apparatus for storing electrical energy needs to recharge in the position of the vehicle acceleration along the travel route, here SOC It is reduced to less than threshold level.After determining when that the expected needs of apparatus for storing electrical energy recharge, method 800 is carried out To 804.

804, method 800 judges whether apparatus for storing electrical energy has had enough charges to push in entire stroke again Vehicle.In one example, according in entire time interval F=ma+mgsin (Θ) or E=1/2mv², SOC is again Energy comparison with estimation is to run vehicle in entire traveling.If it is enough that method 800 judges that apparatus for storing electrical energy has Storage charging is to run DISG in entire travel route, then answer is "yes", and method 800 proceeds to and exits.Otherwise, it answers It is "No" and method proceeds to 806.

806, method 800 determines which is partially filled via engine to the energy accumulating device with position in travel route It is low that electricity will be that most effective and SOC is expected to.In 702,708 and 714 positions determined of method 700, SOC can be by It is contemplated to be low.The energy accumulating device that charges can be the position of most effective travel route and part can be based on according to warp Test the engine speed and load of every mile of the engine minimum fuel of consumption of determining driving.For example, if determined in engine In 2200RPM, every mile of driving engine operation consumes least fuel to load between 0.2 and 0.3, then exists in engine It, can be true when DISG charges to energy accumulating device when 2200RPM and under speed of the load between 0.2 and 0.3 Determining energy accumulating device should recharge via engine.Therefore, in one example, effectively start for corresponding to The extended period (for example, 10 miles) of machine operation conditions, method 800 according to constant vehicle speed (such as 55MPH speed limit System) road sections be selected as energy accumulating device charging travel route position and part.In some instances, selection hair The expected car speed for being greater than threshold efficiency of motivation efficiency.Engine efficiency can be empirically determined under specific speed And store in memory.Via engine to energy accumulating device charge most effective travel route part it is true Method 800 proceeds to 808 after fixed.

808, method 800 determines that engine can make the charge that energy accumulating device provides completely in travel route Position and part.For example, the estimation of method 800 can be used to push the energy of vehicle from its current location to final destination Amount, wherein via engine to energy accumulating device charge be considered.Energy accumulating device can be along travel route Any position recharges, and engine efficiency is greater than threshold efficiency and pushes vehicle from its current location to its mesh in the position Ground energy be greater than charging threshold quantity (for example, capacity of energy accumulating device).It is by engine in travel route Method 800 proceeds to 810 after the part that the charging that energy accumulating device provides can be utilized thoroughly.

810, method 800 selects the engine in travel route that can most effectively provide charging for energy accumulating device And by the position and part of the travel route that engine is thoroughly utilized for the charge that energy accumulating device provides.For example, such as Fruit method determines that energy accumulating device stores enough energy to push 10 miles of vehicle and vehicle destination is 20 miles, and It is run with being higher than the efficiency of threshold efficiency, then position of 20 miles from purpose can choose as storing up via engine to energy The position of cryopreservation device charging.When engine is that energy accumulating device charges via the engine, power train disconnect-type clutch Closure.After the position for charging via engine to energy accumulating device is selected, method 800, which proceeds to, to be exited.

It in this way, can be high according to the engine during charging via the energy accumulating device charging of engine Effect ground runs and is allowed to be supplied to energy accumulating device using via engine with a distance from destination according to vehicle location Any charge and it is preferential.Moreover, the priorization can be the basis for determining the position of power train patterns of change.

Therefore, Fig. 1-8 provides the method and system of operation of hybrid vehicle, comprising: the operation of response vehicle destination passes Dynamic is disconnect-type clutch.In this way it is possible to improve power train operation.This method comprises: operation power train separate type from Clutch includes responding to run the power train disconnect-type clutch in the information that vehicle destination can obtain charging unit.This method Further include respond the hybrid vehicle powertrain systems reach vehicle destination by the estimation of the energy utilized stop engine and Reduce the amount for the charge being stored in energy accumulating device.This method further includes the quantity of electric charge by running in conjunction with starter/power generation The power train of machine and reduce.This method further includes that operation power train disconnect-type clutch includes response instruction in vehicle destination The information that charging unit cannot be obtained is closed the power train disconnect-type clutch.This method further includes being closed the power train separate type Clutch and respond vehicle purpose position give energy accumulating device charging.

The method and system of Fig. 1-8 is also provided for operation of hybrid vehicle, comprising: receives travel route in controller Information；Power train disconnect-type clutch is selectively run with the travel routes information is responded.This method further includes the traveling road Line information is included in whether purpose can obtain charging station, and selectively operation power train disconnect-type clutch includes that response should The amount that hybrid vehicle reaches the energy of purpose forecast consumption runs the power train disconnect-type clutch.

In some instances, this method includes that the travel routes information includes the information of downward grades, and responds the descending The grade information power train disconnect-type clutch stays open.This method includes the row of the first stroke from entire travel route Sail route information storage in the controller.This method further include the travel routes information is accessed according to the current route of vehicle, and And response is in the availability open or close of the destination electrically-charging equipment power train disconnect-type clutch.This method further includes, Selectively operation power train disconnect-type clutch includes responding the number that expected vehicle stops during travel route to open With the closure power train disconnect-type clutch.

In one example, this method includes selectively running power train disconnect-type clutch including response not include The number that the move vehicle that the vehicle stopped from vehicle accelerates accelerates opens and closes the power train disconnect-type clutch.This method Further include, selectively run power train disconnect-type clutch include respond from vehicle stop vehicle accelerate number open and It is closed the power train disconnect-type clutch.Moreover, this method further includes, the information of the travel route includes road slope information, It and further include responding the travel routes information to store charge in apparatus for storing electrical energy.

The method and system of Fig. 1-8 is additionally provided for operation of hybrid vehicle, comprising: access apparatus for storing electrical energy State of charge (SOC)；Travel routes information is received in controller；With the SOC and row of response before reaching first position It sails route information and is predefined in first position and charge the apparatus for storing electrical energy.This method further includes that hybrid vehicle reception comes from The travel routes information of different vehicle except the hybrid vehicle.This method further includes responding travel routes information operation Power train disconnect-type clutch.This method further includes that the predetermined of apparatus for storing electrical energy is filled in the variation update responded in driving condition Electricity.This method further includes discharging in the predetermined second position apparatus for storing electrical energy before reaching the second position.

Referring now to Figure 9, Fig. 9 shows the illustrative of the vehicle mass operation hybrid powertrain for responding variation The flow chart of method.The method of Fig. 8 can be used as the non-transient memory that executable instruction is stored in the system of Fig. 1-3 In.And.The method of Fig. 9 can provide timing shown in Fig. 10.

902, method 900 determines vehicle working condition.Vehicle working condition can include but is not limited to engine speed, vehicle speed Degree, energy accumulating device SOC, engine load, engine torque demand and vehicle acceleration.The operating condition can be from Fig. 1-3 institute The sensor shown is determining or infers.After determining vehicle working condition method 900 proceed to 904,

904, method 900 determines vehicle mass.In one example, vehicle mass equation based on following:

Wherein vehicle acceleration is zero,

Engine/drive train torque ≈ road load+torque based on the gradient

Use T_wh1=R_rrM_vgsin (Θ₁)+T_rl1

Wherein:

T_wh1=in Θ₁Gradient angle on wheel torque

T_wh2=in Θ₂Gradient angle on wheel torque

R_rr=driven wheel the radius of gyration

M_v=vehicle mass estimation

G=gravity constant

Θ₁=gradient angle

The road load torque of the driven wheel of T_rl1=in the gradient 1

The road load torque of the driven wheel of T_rl2=in the gradient 2

Then, vehicle mass is estimated are as follows:

M_v=[(T_wh1–T_wh2)+(T_rl2–T_rl1)]/[R_rr*g*(Θ₁–Θ₂)]

In some instances, vehicle mass includes the quality of vehicle and the quality of the trailer dragged forward by the vehicle.At it In his example, vehicle mass is only the quality of vehicle without trailer.In addition, in some embodiments, vehicle mass can wrap Include the quality of the vehicle occupant and vehicle cargo.Engine/drive train torque can be from empirically determined torque curve Or it is determined using the function that engine speed and load index.For example, motor torque can pass through index engine speed With the motor torque output estimation of load index.Method 900 proceeds to 906 after estimating vehicle mass.

906, method 900 adjusts the energy accumulating device SOC threshold for allowing engine automatic stop.In an example In, when vehicle mass increases, energy accumulating device SOC threshold is increased, therefore when energy accumulating device is greater than first threshold level When under vehicle acceleration mode vehicle motor will stop.Reduce if vehicle mass reduces energy accumulating device SOC threshold, because When energy accumulating device is greater than second threshold level, vehicle motor will stop under vehicle acceleration mode for this, the second threshold It is horizontal that level is less than first threshold.Energy accumulating device SOC threshold can change proportionally adjusting or conduct with vehicle mass The function of vehicle mass is adjusted.Figure 10 shows two SOC threshold levels based on different vehicle quality.Engine is used for adjusting Method 900 proceeds to 908 after the energy accumulating device SOC threshold of stopping.

908, method 900 judges whether there is the situation for being automatically stopped engine.In some instances, for certainly The dynamic situation for stopping engine includes following situation: instruction vehicle accelerates, brake pedal is stepped on, stepped on without accelerator pedal Under and energy accumulating device SOC be greater than threshold level.If method 900 judges to meet the item for being automatically stopped engine Part, answer is "yes" and method 900 proceeds to 910, otherwise, and answer is "No" and method 900 proceeds to 912.

910, method 900 is automatically stopped engine.Engine can be by stopping to the fuel and/or spark of engine It is automatically stopped, without the driver requested engine via the device with the unique function of stopping and/or start engine Stop.Method 900 proceeds to 912 after the engine is stopped.

912, method 900 judges whether engine has been automatically stopped.In one example, work as engine automatic stop When, a bit in engine controller.If method 900 judges that engine has been automatically stopped, answer is "yes" simultaneously And method 900 proceeds to 914.Otherwise, answer is "No" and method 900 proceeds to and exits.

914, method 900 judges whether vehicle mass is less than threshold quality.In one example, threshold quality is unloaded Quality adjustment (mass of the vehicle mass of vehicle plus one or more personal and specific quantity cargos Accommodations).If method 900 judge vehicle mass be less than threshold quality, answer is "yes" and method 900 into It goes to 916.Otherwise, answer is "No" and method 900 proceeds to 922.

916, method 900 judges whether friction catch application of force is less than threshold value.Alternatively, judge in 916 methods 900 Whether brake pedal is applied.If friction catch application of force is less than threshold value or if not applying brake pedal, answer is "yes" And method 900 proceeds to 918.Otherwise, answer is "No" and method 900 proceeds to and exits.

918, method 900 makes engine stay in halted state and provides wriggle (creep) turn to wheel via DISG The threshold quantity of square (for example, vehicle is mobile with scheduled slow rate (2 miles per hour) in the plane).It is compacted being exported via DISG Method 900 proceeds to 920 after dynamic torque.

920, method 900 responds driver requested torque and provides the fundamental quantity of face of fluid torque converter torque.Fluid power The fundamental quantity of converter pump torque does not consider any variation of vehicle mass.Moreover, in one example, fluid torque-converter pump The fundamental quantity of wheel torque is based on driver to the output (for example, driver requested torque) of accelerator pedal and accelerator pedal The amount of offset is converted into face of fluid torque converter torque.In other examples, wheel torque, engine braking torque, and/or Other torques relevant to power train can replace face of fluid torque converter torque.Face of fluid torque converter torque is converted into wishing DISG electric current and the electric current be supplied to DISG to provide face of fluid torque converter torque.

922, method 900 judges whether friction catch application of force is less than threshold value.Alternatively, judge in 922 methods 900 Whether brake pedal is applied.If friction catch application of force is less than threshold value or if not applying brake pedal, answer is "yes" simultaneously And method 900 proceeds to 924.Otherwise, answer is "No" and method 900 proceeds to and exits.

924, engine restarting, power train disconnect-type clutch is closed, and provides at least one by engine Some vehicles wriggling torque.In some instances, the torque of vehicle wriggling can be provided by engine and DISG.Show at other In example, vehicle wriggling torque is provided separately by engine.At least part vehicle is provided in engine start and by engine After wriggling torque, method 900 proceeds to 926.

926, method 900 responds driver requested torque and provides turn for the face of fluid torque converter that vehicle mass is adjusted Square.For example, the face of fluid torque converter torque that method 900 provides fundamental quantity adds and is based on the increased additional torque of vehicle mass Amount.In one example, additional amount of torque can be empirically determined and be stored in by the vehicle more than basic vehicle quality In table or function in the controller storage of quality index.Face of fluid torque converter torque can be provided separately by engine Or it is provided by engine and DISG.In one example, it is desirable to face of fluid torque converter torque by responding desired fluid power Converter pump torque opens engine air throttle and provides fuel to engine to provide.In other examples, the hope Face of fluid torque converter torque by supplying a certain amount of electric current to DISG and supply fuel and air throttle to engine Opening provides.Method 900, which proceeds to, after providing desired face of fluid torque converter torque exits.

In this way it is possible to which the variation for responding vehicle mass adjusts engine and power train disconnect-type clutch.Moreover, Situation for stopping engine according to SOC can also be adjusted according to vehicle mass.

Referring now to Figure 10, Figure 10 shows the vehicle mass operation of hybrid vehicle powertrain for responding variation Exemplary timing.The timing of Figure 10 can be carried out by the method shown in Fig. 10 executed in the system shown in Fig. 1-3.

The first figure from the top of Figure 10 is the graph of relation of car speed and time.Y-axis indicates car speed simultaneously And car speed increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases along the direction of X-axis arrow.

The second figure from the top of Figure 10 is the graph of relation of engine operating state and time.Y-axis expression is started Machine operating status.When trace is in higher level, engine is running and is running combustion air-fuel mixture.Work as trace Engine shuts down and does not burn when being in reduced levels.X-axis indicates the time and the time increases along the direction of X-axis arrow.

Third figure from the top of Figure 10 is the graph of relation that vehicle braking applies state and time.Y-axis indicates vehicle On-position.Vehicle brake pedal is applied when trace is in higher level.Vehicle is not applied when trace is in reduced levels Brake pedal.X-axis indicates the time and the time increases along the direction of X-axis arrow.

The graph of relation of face of fluid torque converter torque and time that the 4th figure from the top of Figure 10 is desirable to.Y Axis indicates desired face of fluid torque converter torque and desired face of fluid torque converter torque increases along the direction of Y-axis arrow Add.X-axis indicates the time and the time increases along the direction of X-axis arrow.

The 5th figure from the top of Figure 10 is the graph of relation of energy accumulating device state of charge (SOC) and time.Y Axis indicates energy accumulating device SOC and energy accumulating device SOC increases along the direction of Y-axis arrow.X-axis indicate the time and Time increases along the direction of X-axis arrow.Horizontal mark 1002 indicates least energy storage device SOC level, horizontal at this, For example, when vehicle mass by increase vehicle pay load increase when, engine can stop and power train separate type from Clutch is opened.Horizontal mark 1004 indicates least energy storage device SOC level, in this level, when the quality of vehicle is base When the quality of this empty-car, engine can stop and power train disconnect-type clutch is opened.Therefore, when vehicle is in its base Engine can stop under lower SOC level when this quality and power train disconnect-type clutch is opened.On the other hand, work as vehicle When quality increases, engine can stop under higher SOC level and power train disconnect-type clutch is opened, therefore start Machine continues to run unless energy accumulating device is in the SOC of higher level.

The 6th figure from the top of Figure 10 is the graph of relation of vehicle mass and time.Y-axis indicates vehicle mass simultaneously And vehicle mass increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases along the direction of X-axis arrow.

The 7th figure from the top of Figure 10 is the graph of relation of power train disconnect-type clutch state and time.Work as mark Power train disconnect-type clutch is in opening state when line is in lower level.The power train when trace is in higher level Disconnect-type clutch is in closed state.X-axis indicates the time and the time increases along the direction of X-axis arrow.

In time T₀, car speed zero, engine stop, brake pedal is applied, and energy accumulating device SOC compares Height, power train disconnect-type clutch is opened, and vehicle mass is in reduced levels.In this illustration, engine has been rung Answer that car speed is zero and brake pedal is applied and is automatically stopped.

In time T₁, driver loosens the brake, and since DISG(is not shown) and response driver's take-off the brake steps on Plate applies torque to vehicle transmission system and car speed gradually increases.Engine is maintained at shutdown status and power train separate type Clutch stays open.Desired face of fluid torque converter torque response driver loosens the brake and then increases driver It is required that torque and increase.Driver requested torque can be engine braking torque, face of fluid torque converter torque, wheel Torque or other drive train torques.Vehicle mass is kept low and since DISG pushes alone vehicle, energy storage Cryopreservation device SOC starts to be reduced.

In time T₂, it is desirable to face of fluid torque converter torque response operator torque request (not shown) have been added to Engine starts automatically and the level of power train disconnect-type clutch closure.When driver requested torque is more than the threshold value of torque When horizontal, engine can start automatically and to have start and/or stop engine sole purpose device (for example, point Fire switch) it is directly inputted without driver.Car speed responds increased face of fluid torque converter torque and continues growing.Vehicle Quality is kept low and as vehicle acceleration energy storage device SOC continues to reduce.Vehicle brake pedal is kept not State.

In time T₃, vehicle begins to respond to driver requested torque and reduces and slow down.Vehicle mass reduced levels simultaneously And energy accumulating device SOC is higher than threshold level 1004 so as to power train disconnect-type clutch opening, and since driver wants The torque asked reduces engine response vehicle and enters deceleration mode and stop.Desired face of fluid torque converter torque response is reduced Driver requested torque and reduce.Vehicle brake pedal state keeps unclamping and energy accumulating device is by by vehicle inertial Sex reversal is started to charge at the DISG of electric energy.

In time T₃And T₄Between, vehicle stops and vehicle braking is applied by driver.Energy accumulating device SOC is Increase and power train disconnect-type clutch is maintained at opening state.Engine is also maintained at shutdown status.

In time T₄, vehicle mass increase.For example, when driver or other people be added to cargo or passenger in vehicle when Vehicle mass can increase.Car speed is maintained at zero and engine remains shut off.Desired face of fluid torque converter torque It is kept low and energy accumulating device SOC is remained unchanged.Power train disconnect-type clutch is also maintained at opening state.

In time T₅, driver loosen the brake and with desired face of fluid torque converter torque increase DISG turn Square output increases.Desired face of fluid torque converter torque response driver loosens the brake and increases driver requested turn Square and increase.Start to reduce since DISG applies torque energy accumulating device SOC to vehicle transmission system.Car speed starts gradually Increase.But since vehicle mass has increased, vehicle is accelerated with low rate.Controller starts basis and is applied to power train The rate estimates vehicle mass variation that torque and vehicle accelerate.

In time T₅And T₆Between, engine response face of fluid torque converter torque increases to opens automatically greater than threshold level It is dynamic.Power train disconnect-type clutch is greater than threshold level also responsive to face of fluid torque converter torque and is closed.Energy accumulating device SOC is reduced and DISG provides torque to power train.

In time T₆, driver reduces driver requested torque and applies vehicle braking.Engine remains operational simultaneously And power train disconnect-type clutch engages, therefore can provide braking in vehicle acceleration period engine.Due to vehicle mass Through increase and since energy accumulating device SOC is less than threshold level 1002, engine is remained operational.Therefore, work as vehicle mass Power train disconnect-type clutch opens timing and can postpone or postpone when increase.Equally when vehicle mass reduces, power train is separated Formula clutch, which opens timing, to shift to an earlier date.Vehicle mass is maintained at higher level and vehicle slows down towards zero velocity.Work as vehicle Energy accumulating device SOC increases when deceleration.

In time T₇, since speed reaches zero, power train disconnect-type clutch is opened and engine stop.Vehicle braking It is maintained at application state and desired face of fluid torque converter torque is kept low.Vehicle mass when the vehicle is stopped It remains unchanged.

In time T₈, brake pedal is unclamped by driver and engine starts automatically.In this example, when engine stops Power train disconnect-type clutch is opened when only；But power train disconnect-type clutch remains closed in some instances, to send out Motivation and DISG accelerate to the speed of service simultaneously.Once responding increased vehicle mass and loosening the brake, engine is again Starting.In this way, it since engine and DISG can be obtained when brake pedal unclamps, can reduce uncommon to be less than A possibility that rate accelerating vehicle of prestige.Moreover, engine and DISG can be used when driver does not step on vehicle accelerator pedal With when the vehicle is unladen and when only pushing vehicle by DISG identical rate apply and push the wriggling torque of vehicle.

Desired face of fluid torque converter torque also responsive to the vehicle mass of estimation increase and increase.Increase desired liquid Power converter pump torque makes vehicle to be similar to when vehicle mass is lesser (for example, in time T₁) accelerating vehicle Mode accelerates.Therefore, similar accelerator pedal is inputted, vehicle accelerates to be similar to when vehicle mass is reduced and is accelerated When the input of device pedal is identical.In this way, even if inputting and driving for equivalent accelerator pedal in vehicle mass variation Member can be subjected to similar vehicle and accelerate.

Therefore it provides the method and system of Fig. 1-3 and Fig. 9-10 is used for operation of hybrid vehicle, comprising: response vehicle The variation of quality adjusts the opening of power train disconnect-type clutch.This method further includes that the variation adjusting of response vehicle mass is started Machine stops timing.This method includes adjusting increase of the operation including responding vehicle mass of power train disconnect-type clutch Postpone power train disconnect-type clutch and opens timing.This method includes adjusting the operation packet of power train disconnect-type clutch The reduction for including response vehicle mass shifts to an earlier date power train disconnect-type clutch and opens timing.This method further includes response vehicle mass tune Amount of energy saving storage device state of charge threshold value.This method includes adjusting energy accumulating device state of charge threshold value to include response vehicle Quality increases energy accumulating device state of charge threshold value.

In another example, the method and system of Fig. 1-8 is provided for operation of hybrid vehicle, comprising: response vehicle The variation of quality adjusts the operation of power train disconnect-type clutch；Start with being automatically stopped at the time of responding the mass change Machine.This method further includes responding vehicle mass when vehicle mass is in the first vehicle mass not restart engine.The party Method further includes that vehicle mass restarting engine is responded when vehicle mass is in the second vehicle mass.This method include this Two vehicle mass are greater than the first vehicle mass.This method further includes being provided to after restarting engine by the engine Few a part of wriggling torque.

In some instances, this method include when engine does not start and when hybrid vehicle is not moved via Wriggling torque is provided separately in DISG.This method further includes the desired face of fluid torque converter of variation adjusting for responding vehicle mass Torque.This method includes that the desired face of fluid torque converter torque of adjusting includes when the variation of vehicle mass increases vehicle mass Face of fluid torque converter torque desired by Shi Zengjia.This method further includes adjusting desired face of fluid torque converter torque to include Face of fluid torque converter torque is reduced when the variation of vehicle mass reduces vehicle mass.

In another example, the method and system of Fig. 1-8 is provided for operation of hybrid vehicle, comprising: response vehicle The variation of quality adjusts the operation for the power train disconnect-type clutch being connected to engine；The first energy accumulating device is responded to fill The electric horizontal first charge threshold state that is greater than is automatically stopped engine, which is based on vehicle mass and changes it The first preceding vehicle mass；And the second energy accumulating device charge level of response is greater than the second charge threshold state and is automatically stopped Engine, the second charge threshold state is based on the second vehicle mass after vehicle mass variation.Therefore, transmission can be run It is disconnect-type clutch to improve vehicle performance according to vehicle mass.

In some instances, this method includes that the second charge threshold state is greater than the first charge threshold state.This method packet The second vehicle mass is included greater than the first vehicle mass.This method further include when an engine is stopped power train disconnect-type clutch beat It opens.This method further include when an engine is stopped power train disconnect-type clutch closure.

Referring now to Figure 11, Figure 11 is shown for the method by the first motor or the second motor start-up engine Flow chart.In the non-transient memory for the controller 12 that the method for Figure 11 can be stored in Fig. 1-3 as executable instruction.

1102, method 1100 determines vehicle working condition.Vehicle working condition include but is not limited to engine speed, DISG speed, Car speed, drive train torque demand, engine coolant temperature and power train disconnect-type clutch operating status (for example, It opens, partially open or is closed).Method 110 proceeds to 1104. after operating condition determines

1104, the situation that the judgement of method 1100 stops engine rotation whether there is.In one example, when desired Engine when drive train torque (for example, the combined torque provided by engine and/or DISG) is less than the threshold quantity of torque Rotation stops.If the situation that the judgement of method 1100 stops engine rotation is not present, method 1100 proceeds to 1106.It is no Then, method 1100 proceeds to 1110.

1106, method 1100 runs engine.By being somebody's turn to do according to engine operating condition to engine offer spark or fuel Engine is run.In some examples that engine is diesel engine or the compression ignition of homogeneous charge gas (HCCI) engine In, engine can not have spark operation.Method 1100 proceeds to 1108. after engine operation

1108, method 1100 provides torque from engine to wheel.Motor torque can pass through closure power train point It is exported from formula clutch and by engine and wheel is guided by speed changer to be supplied to wheel.In some instances, engine It can be supplied to wheel simultaneously with DISG torque.Method 1100, which proceeds to, after motor torque is supplied to wheel exits.

1110, method 1100 stops engine and rotates and open or separate power train disconnect-type clutch.Engine Rotation can be by stopping stopping to the fuel and/or air stream of engine cylinder.Method 1100 after the engine is stopped Proceed to 1112.It should be pointed out that in engine stop DISG can respond it is driver requested continue as wheel provide torque.

1112, the situation of the judgement restarting engine of method 1100 whether there is.In one example, work as power train Engine can restart when torque-demand is more than threshold torque amount.In other examples when the temperature of catalyst is reduced to low Engine can restart when threshold temperature.If method 1100 judges that the situation of the restarting engine of selection exists, Method 1100 proceeds to 1114.Otherwise, method 1100 proceeds to 1104.

1110, method 1100 determines the amount of the available torque from DISG.From the amount of the available torque of DISG Based on specified DISG torque, battery charge state, DISG speed and DISG temperature.The table of DISG torque can be obtained in description Storage is in memory and fast by battery charge state (for example, battery voltage and peace times hour rated value), DISG Degree and DISG temperature index.The amount of table output DISG torque obtained by the DISG.Determining obtainable DISG torque After amount, method 1100 proceeds to 1116.

1116, method 1100 judges whether DISG has the capacity of starting engine and whether provide desired torque Amount.In one example, it is desirable to amount of torque can at least adjust from driver to change the acceleration of desired drive train torque Device pedal partly determines.The torque of starting engine can be table or letter empirically determined and that be stored in memory In number.The table or function can be indexed by engine temperature and the time from engine stop.The table is exported from zero-speed Degree reaches the torque of desired engine start velocity of rotation (for example, 250RPM).The torque of starting engine is added to by driving The desired drive train torque that the person of sailing provides, and the amount of available DISG torque is from the starting torque of engine and desired The sum of drive train torque subtracts.If be as a result positive, DISG does not provide the torque of starting engine and provides desired pass Dynamic is the capacity of torque.Therefore, method 1100 proceeds to 1124.If be as a result negative, DISG, which has, provides starting engine Torque and the capacity of desired drive train torque is provided.Therefore, method 1100 proceeds to 1118.

1118, method 1100 judges whether to have required engine start.If required, method 1100 is carried out To 1120.Otherwise, method proceeds to 1122.For example, when engine torque demand increases or when driver loosens the brake When, method 1100 may determine that engine start requirement has been made.

1120, method 1100 provides DISG torque for wheel and for engine.The DISG torque passes through closure transmission It is disconnect-type clutch and torque is passed into engine from DISG and is supplied to engine.The biography during engine start Dynamic is that disconnect-type clutch can be partly closed to control engine speed.Before fuel and spark are supplied to engine, Engine can be to start speed (for example, 250RPM) rotation of rotation or with basic idling speed (for example, 800RPM) Rotation.Method 110 returns to 1104 after DISG torque is supplied to engine and wheel.

1122, method 1100 provide DISG torque for wheel.The DISG torque for being supplied to wheel can be based on acceleration The input of device pedal and/or the input from controller.Method 1100 returns to 1104. after DISG torque provides wheel

1124, method 1100 judges whether to have existed engine start requirement.As in 1118 descriptions, engine Starting requires can produce.If having required engine start, method 1100 proceeds to 1126.Otherwise, method 1100 into It goes to 1122.

1126, method 1100 passes through the second motor start-up engine with the power output capacity lower than DISG. For example, engine can be by including that the conventional starter of pinion shaft and pinion gear starts, which is selectively connect Engine flywheel is closed to start engine.When torque is provided separately with rotary engine in the second motor power train separate type from Clutch closure.Moreover, be supplied to engine in 1126 fuel and spark to start to burn in the cylinder so that engine its from It is rotated under oneself power.Method 110 proceeds to 1128 after the engine is started.

1128,1100 couple drive system disconnect-type clutch of method, the torque transfer from engine can be given Wheel.In one example, engine speed is increased up the speed of engine speed match DISG.Work as engine speed match The power train disconnect-type clutch is closed when the speed of DISG, to reduce a possibility that introducing torque interference to power train.It is sending out Motivation starting and method after torque is provided for wheel proceed to and exit.

It should be pointed out that the method for Figure 11 only show via lower-wattage capacity motor (starter) or individually by One example of motor (DISG) the starting engine of higher capacity.Other examples are also among expecting.For example, working as When the starter of DISG and lower-wattage capacity is run both, the starter of the DISG and lower-wattage capacity can be in difference Operating condition under start engine.But if DISG is deactivated, then during otherwise DISG will start the engine condition, compared with The starter of low-power capacity can star engine after rotational automatic stopping in engine.For example, if not having It is deactivated, when DISG can start the engine and provide torque for power train, the starter of lower-wattage capacity can be with Start engine.On the other hand, if the starter motor of lower-wattage capacity is deactivated, when drive train torque demand is lower When threshold level, which can be started by DISG, because the starter motor of lower-wattage capacity is unavailable.

Referring now to Figure 12, Figure 12 shows the curve of the exemplary timing for the method starting engine according to Figure 11 Figure.Vertical mark T₁₀-T₁₇Indicate correlation time in the timing.The timing of Figure 12 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 12 indicates the graph of relation of DISG and time.X-axis indicates time and time Increase to the right from the left side of figure.Y-axis indicates DISG torque and DISG torque increases along the direction of Y-axis arrow.Horizontal line 1202 indicate the amount of available DISG torque.Horizontal line 1204 indicates that DISG can be with when DISG starts rotation engine The amount of the torque of speed changer input is provided.Difference between horizontal line 1202 and 1204 represents starting engine start and starts Rotate the amount of the torque of engine.

The second figure from the top of Figure 12 indicates the graph of relation of engine speed and time.X-axis indicates the time simultaneously And the time increases from the right side of the left lateral view of figure.Y-axis indicates engine speed and engine speed along the side of Y-axis arrow To increase.

Third figure from the top of Figure 12 indicate power train disconnect-type clutch state (for example, open or close) and when Between graph of relation.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.Y-axis indicates power train separation Formula clutch state, and as shown in the figure in top side power train disconnect-type clutch state be open and close to X-axis be closure 's.

The 4th figure from the top of Figure 12 indicates the graph of relation of low-power output starter state and time.X-axis It indicates the time and the time increases from the right side of the left lateral view of figure.Y-axis indicates that low-power exports starter state, and works as mark Low-power output starter state is engaged when line is in higher level, and is separated when trace is in reduced levels.

The 5th figure from the top of Figure 12 indicates the graph of relation of engine start claimed condition and time.X-axis table Show the time and the time increases from the right side of the left lateral view of figure.Y-axis indicates engine start claimed condition, and at trace In higher level, engine start claimed condition is identified as starting or run.And engine opens when trace is in reduced levels Dynamic claimed condition does not regard as engine start or operation, or indicates engine stop.

In time T₁₀, DISG torque response underneath drive system torque-demand (not shown) is in reduced levels.The power train turns Square demand can be generated from accelerator pedal or other devices, and can be inputted in response to driver.Engine also stops And power train disconnect-type clutch is open.Lower-wattage output starter does not engage and there is no engine starts to want It asks.

In time T₁₁, engine start requirement is provided when DISG torque is less than threshold value 1204.Engine start requirement Battery charge state (SOC) can be responded or other situations propose.Low-power output starter holding does not work and it Power train disconnect-type clutch is briefly closed afterwards.Power train disconnect-type clutch is closed by the torque transfer from DISG to hair Motivation, thus start rotation engine.Engine start after a short while is at least partly closed in DISG.Start rotation hair Power train disconnect-type clutch can be with when motivation and during engine accelerates to the operation of DISG speed from engine stop Sliding.

In time T12, engine start/service requirement response vehicle working condition is (for example, the battery of charging and application vehicle Brake pedal) it is transformed into low-level.Response engine start/service requirement power train disconnect-type clutch is opened and starts Machine stops.DISG continues to provide torque to vehicle transmission system.

In time T₁₂And T₁₃Between, DISG torque output responds increased driver requested torque (not shown) and increases Add.Engine remains shut off and power train disconnect-type clutch stays open.

In time T₁₃, engine start/service requirement in response to battery SOC less than threshold value charge level (not shown) and by Assert.As being greater than shown by threshold level 1204 as DISG torque, low-power output starter is activated.Work as engine When starting rotation by low-power output starter, power train disconnect-type clutch is open.When engine speed is more than rotation Low-power output starter is deactivated when engine start rotates.

In time T₁₄, power train disconnect-type clutch is closed after engine speed reaches DISG speed.Engine Starting/service requirement is kept and both DISG and engine to vehicle transmission system provide torque.

In time T15, engine start/service requirement is transformed into low-level to indicate that engine will be stopped.Hereafter After a short while, engine stop and power train disconnect-type clutch respond engine start/service requirement and are transformed into low water It puts down and is opened.DISG continues to provide torque to vehicle transmission system.

In time T₁₆, it is more than threshold torque (not shown) that engine start/service requirement, which responds driver requested torque, And it is identified.Therefore engine can increase DISG torque to power train output torque for engine restarting.Low-power is defeated Starter is transformed into higher level in response to engine start/operation and is engaged out.Low-power output starter response is started Machine speed is more than threshold velocity and disconnects.

In time T₁₇, respond engine speed and reach DISG speed transmission system's disconnect-type clutch closure.In power train point Torque is provided to vehicle transmission system from engine after formula clutch closure and DISG.

In this way, engine can export starter starting by DISG or lower-wattage.Lower-wattage output Starter enables DISG than if only having the DISG for starting rotation engine capacity to export a greater amount of torques to transmission System.Moreover, lower-wattage output starter enables engine speed to reach before power train disconnect-type clutch closure DISG speed, therefore there is no torque interference that can be noted in the vehicle transmission system.

Therefore it provides the method and system of Fig. 1-3 and Figure 11-12 is to start engine, comprising: during the first situation, In power train disconnect-type clutch closure with the first motor start-up engine；With during the second situation, divide in power train With the second motor start-up engine when being open from formula clutch.This method includes that the output power of second motor holds It measures lower than the power output capacity of the first motor.This method includes that first motor is the biography for combining starter/generator Dynamic system (DISG), and the power train disconnect-type clutch is with the first side for being connected mechanically to double mass flywheel and mechanically It is connected to second side of the DISG.

In some instances, this method includes the drive train torque that is desirable to of first situation less than during the second situation Drive train torque.This method includes that the power train disconnect-type clutch responds desired drive train torque opening.This method includes The power train disconnect-type clutch when the sum of desired drive train torque and engine cranking torque are greater than the threshold quantity of torque Closure.This method further includes the downstream that engine is arranged in the first motor, and the fluid torque-converter by rotating wheel mentions It is arranged at engine for torque and second motor and starts rotation engine speed lower than engine idle rotational When, torque is not provided to rotate wheel by fluid torque-converter.

In other examples, provide the method and system of Fig. 1-3 and Figure 11-12 for starting engine, comprising: when it is desirable that Torque-demand be less than first threshold amount when via the first motor start-up engine；When desired torque-demand is greater than the first threshold Via the second motor start-up engine when value amount；And enough turn is provided separately by the first motor under the operating condition of selection Square is to rotate wheel.Therefore, different motor can start engine during different situations.

This method includes that first motor is the power train (DISG) for combining starter/generator, and the DISG exists Position between power train disconnect-type clutch and speed changer is arranged in hybrid vehicle powertrain systems.This method includes passing through It is at least partly closed the power train disconnect-type clutch, which provides torque to start the rotation of the engine of stopping.It should Method further includes disconnecting the second motor from engine when engine speed reaches threshold velocity.This method includes second electricity Motivation includes pinion shaft and pinion gear.This method includes the first threshold amount as the state of charge of battery changes.The party Method further includes velocity variations of the first threshold amount with the first motor.

The method and system for also providing Fig. 1-3 and Figure 11-12 is used for a kind of hybrid vehicle system comprising: start Machine；It is selectively engaged the engine and the starter including pinion gear；First including being connected mechanically to the engine The double mass flywheel (DMF) of side；It mechanically include the power train separation for being connected to first side of second side of the double mass flywheel Formula clutch；Power train integrated actuating machine/hair including being connected to first side of second side of the power train disconnect-type clutch Motor (DISG)；And including it is executable with during the first starting via the starter and during the second starting via this DISG starts the controller of the non-transient instruction of engine.

In one example, which further includes additional instruction, to be greater than threshold in desired torque Start engine via the starter during the situation of value.The hybrid vehicle system includes that the engine passes through via this DISG rotates the engine and starts, and further includes additional instruction, with after the combustion incident of pre-determined number from starting Machine disconnects the DISG.The hybrid vehicle system further includes additional instruction, reaches DISG speed with the speed in engine Engine is connected to the DISG later.The hybrid vehicle system further includes low from the available power output of the starter In from the available power output of the DISG.The hybrid vehicle system further includes that additional instruction is started with being automatically stopped Machine, and started according to the amount of the available DISG output torque engine via DISG.

Referring now to Figure 13, Figure 13, which is shown, adjusts fuel injection to provide desired engine speed during engine start Spend track.The method of Figure 13 can be used as the non-transient memorizer that executable instruction is stored in controller 12 shown in Fig. 1-3 In.

1302, method 1300 judges whether to require starting engine and whether power train disconnect-type clutch does not connect It closes.When engine start variable is identified in memory, method 1300 may determine that engine start was desirable to.Work as biography Dynamic when being that disconnect-type clutch state variable is not identified in memory, method 1300 may determine that power train separate type clutch Device does not engage.If method 1300 judges that engine start is desirable to and power train disconnect-type clutch is not engaged, Method proceeds to 1304.Otherwise method 1300 proceeds to 1316.

1304, method 1300 determines operating condition.Operating condition can include but is not limited to DISG speed, engine temperature, from hair The state of time and power train disconnect-type clutch that motivation rotation has stopped.Method 1300 carries out after operating condition determines To 1306.

1306, method 1300 determines desired engine speed according to face of fluid torque converter speed.In addition, it would be desired to Cylinder air inlet can be determined 1306, therefore can achieve desired speed.In one example, accelerate in engine start (run-up) after (for example, from velocity of rotation is started to desired idling speed) can by desired engine speed modulation to Face of fluid torque converter speed.Therefore, during engine start after engine start acceleration, engine speed is controlled To face of fluid torque converter speed power train disconnect-type clutch is closed, motor torque is passed into wheel and Torque interference is not formed.If desired, engine can via with the starter except DISG (for example, lower-wattage is defeated Starter out) it rotates the engine and is rotated by starting.Method 1300 proceeds to after desired engine speed is selected 1308.It should be pointed out that face of fluid torque converter speed and DISG speed are equivalent, because DISG is connected to fluid torque-converter pump Wheel.

1308, the fuel injection for being used for the first combustion incident is adjusted.It include being approached at the top of combustion chamber in engine In one example of the fuel nozzle being centrally located, during the compression stroke of the cylinder and in the single loop of the cylinder Period gives at least one cylinder via single fuel impulse fuel injection.The from engine stop is participated in after the fuel of injection One combustion incident receives fuel so as to cylinder.After single fuel impulse is injected to cylinder, in engine start accelerated period Between, fuel injection can be with a series of impulse jets, such as 1310 during receiving the air inlet and compression stroke of cylinder of fuel It is described.In one example, to each injection of the engine cylinder of predetermined number during the compression stroke of the cylinder Single fuel impulse.Therefore, fuel is sprayed in a manner of one or more pulses during receiving the circulation of cylinder of fuel It penetrates to each cylinder of predetermined number.For example, two engine cylinders are receiving single fuel injection for four-banger The respective compression stroke of the cylinder during receive single fuel injection.In the air inlet and/or compression punching for receiving the cylinder of fuel Other two engine cylinder receives multiple fuel injection during journey.

In second example that engine includes the fuel injection that the side of combustion chamber is arranged in, it is used for receiving fuel From during the compression stroke of the cylinder of first combustion incident in the cylinder since engine stop, the multiple combustion of each cylinder Material injection is delivered to the engine cylinder of predetermined number.During receiving the compression stroke of cylinder of fuel, in predetermined number Cylinder receive multiple fuel injection after, during receiving the air inlet and/or compression stroke of cylinder of fuel, the spray of multiple fuel Each cylinder can be supplied to by penetrating.In addition, can be according to the position of desired engine speed modulation engine air throttle 1308 It sets.In one example.When desired engine speed increases, engine air throttle is opened during engine start rotation Amount increases.Method 1300 proceeds to 1310 after spraying fuel for the first time combustion incident of each engine cylinder.

1310, method 1300 is according to desired engine speed and actual engine speed and desired engine speed Speed difference between degree adjusts (split) the fuel injection timing of segmented/split and fuel quantity.Specifically, in lower hair Under motivation speed (for example, starting between velocity of rotation 250RPM and 400RPM), in the compression for each cylinder for receiving fuel During stroke, twice or injection more than twice is supplied to each engine cylinder.Medium engine speed (for example, Between 400RPM and 700RPM) under, it is provided during receiving both the induction stroke of each cylinder of fuel and compression stroke more Secondary fuel injection.At higher engine speed (for example, between 700RPM and 1000RPM), only fuel is being received Multiple fuel injection is provided during the induction stroke of cylinder.Certainly, lower, medium and higher engine speed between applications may be used With difference.For example, applying for others, lower engine speed can be medium to start between 200RPM and 300RPM Machine speed can be between 300RPM and 800RPM, and higher engine speed can be between 800RPM and 1100RPM.Cause This, if it is desired to engine speed be higher engine speed, can be with when engine reaches desired engine speed Fuel injection timing is adjusted only to provide multiple fuel injection during receiving the induction stroke of cylinder of fuel.If it is desired to Engine speed be medium engine speed, adjustable fuel injection timing with receive fuel cylinder induction stroke With multiple fuel injection is provided during compression stroke.The timing of segmented fuel injection provides improved at higher engine speeds Fuel mixes and reduces emissions from engines.Segmented fuel injection provides combustion stability simultaneously during compressing with induction stroke And a possibility that reducing engine misses.

In engine start acceleration period, increase when engine speed starts velocity of rotation (for example, 250RPM) from transmission When to desired idling speed, injection terminates (EOI) (for example, to the last time of cylinder injection during cylinder cycle occurs Fuel impulse timing) and spark ignition between time quantum be held essentially constant (for example, ± 3 degree).Due in engine speed Time when increase between different crank positions is reduced, and EOI timing is shifted to an earlier date relative to crankshaft timing, in EOI and spark The time quantum (for example, ± 0.05 second) being basically unchanged is kept between igniting.Moreover, after multiple fuel injection is completed, with Engine speed increases the timing of each fuel injection during cylinder cycle and can shift to an earlier date.Therefore, accelerate in engine start Period increases with engine speed, and fuel injection, which starts (SOI), during cylinder cycle to shift to an earlier date.

If it is desired to engine speed be greater than actual engine speed, pass through increase duration of charge fuel The amount of injection increases.Additional air can also be supplied to engine by opening throttle.If it is desired to engine speed it is small In actual engine speed, reduced by reducing duration of charge fuel injection amount.Engine air amount is by closing Air throttle is closed to reduce.Furthermore, it is possible to responding power train disconnect-type clutch operating condition adjusts fuel injection timing and fuel quantity, so as to First hair adjusts fuel injection timing.For example, if power train disconnect-type clutch is being closed, and power train separate type clutch The engine side rotation of device is slower than the side DISG of power train disconnect-type clutch, can increase fuel injection amount, to accelerate Engine is more nearly DISG speed, and thus reduces drive train torque interference.On the other hand, if power train separate type from Clutch is being closed, and the engine side rotation of power train disconnect-type clutch is than the DISG of power train disconnect-type clutch Side is fast, it is possible to reduce fuel injection amount is more nearly DISG speed with geared-down engine.Moreover, if power train separate type Clutch is being opened, and the function that can be used as power train disconnect-type clutch application of force reduces fuel injection amount, to slow down Engine to idling speed and thus reduce drive train torque interference.It equally, can if power train disconnect-type clutch is opened Using as power train disconnect-type clutch application of force function increase fuel injection amount, with acceleration motor to idling speed and because And reduce drive train torque interference.

In some instances, the fuel injection timing of engine cylinder is adjusted to the cylinder changed with engine speed Stroke.For example, if the speed difference between actual engine speed and desired engine speed increases, method 1300 is from compression Stroke adjusts fuel to induction stroke.By changing injection punching according to the speed difference between actual and desired engine speed Journey can improve air-fuel and mix and promote more completely to burn, therefore can reduce speed difference.

Furthermore, it is possible to which the timing responded when fuel injection is to cylinder adjusts engine throttle position.For example, air inlet Air throttle can be partly closed, with when only during induction stroke spray fuel when to increase charge motion.When fuel sprays When penetrating the fuel injection during being converted to induction stroke from the fuel injection during compression stroke, air inlet air throttle can part It opens on ground.Moreover, being injected to the fuel quantity of the cylinder during cylinder cycle can carry out according to the air capacity for flowing through air throttle It adjusts.Method 1300 proceeds to 1312 after adjusting fuel injection timing.

1312, method 1300 responds the state and desired engine speed and actual of power train disconnect-type clutch Speed difference between engine speed adjusts spark timing.Specifically, when engine speed substantially DISG speed (for example, ± When 100RPM), spark, which is deferred to, generates the level of zero-turn square in power train disconnect-type clutch.Moreover, spark delay can also root It is provided according to the speed difference between DISG and engine.When the speed difference between engine and DISG is reduced, spark retard amount increases Add.

1314, method 1300 judges whether power train disconnect-type clutch has been closed into threshold quantity (for example, providing 80% clutch holding torque).The power train separate type when engine speed is in the predetermined speed of face of fluid torque converter speed Clutch can be closed, so that the torque interference by power train can be reduced.If method 1300 judges power train separate type Clutch has been closed into threshold quantity, then method proceeds to 1316,.Otherwise, method 1300 proceeds to 1304.

1316,1300 early spark timing of method and according to from the later combustion incident of engine stop number or The fuel injection of the single fuel injection during cylinder cycle is converted to according to torque ratio.For example, in power train separate type clutch After device closure, during method 1300 can be converted to cylinder cycle from segmented fuel injection after 10 combustion incidents Single fuel injection.Alternatively, the torque ratio between spark timing and fuel injection timing has been advanceed in spark timing Less than threshold quantity just after, method 1300 can be converted to cylinder cycle from segmented fuel injection during single shot fuel spray It penetrates.Fuel injection timing and spark timing be converted to empirically determined basic timing and store in memory it Afterwards, method 1300, which proceeds to, exits.

Referring now to Figure 14, Figure 14 shows the curve for supplying the exemplary timing of fuel to engine according to the method for Figure 13 Figure.The timing of Figure 14 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 14 indicates the fuel injection timing for being used for No.1 cylinder.X-axis indicates gas No.1 vapour The cylinder stroke of cylinder, and each cylinder stroke is indicated with representative letter.For example, induction stroke is indicated with I, compression stroke is used C indicates that expansion stroke is indicated with P, and exhaust stroke is indicated with E.Y-axis indicates fuel injection.

The second figure from the top of Figure 14 indicates the song of desired face of fluid torque converter speed and No.1 cylinder stroke Line relational graph.X-axis timing is consistent with the timing of the first figure from the top of the figure.Y-axis indicates desired fluid torque-converter pump Wheel speed and desired face of fluid torque converter speed increase along the direction of Y-axis arrow.

Third figure from the top of Figure 14 indicates the curve relation figure of desired engine speed and No.1 cylinder stroke. X-axis timing is consistent with the timing of the first figure from the top of the figure.Y-axis indicates desired engine speed and desired hair Motivation speed increases along the direction of Y-axis arrow.

The 4th figure from the top of Fig. 4 indicates the curve relation figure of actual engine speed Yu No.1 cylinder stroke.X Axis timing is consistent with the timing of the first figure from the top of the figure.Y-axis indicates actual engine speed and actual hair Motivation speed increases along the direction of Y-axis arrow.

Engine speed and actual engine speed desired by the 5th chart from the top of Fig. 4 and between speed The curve relation figure of poor (delta motor speed) and No.1 cylinder stroke.X-axis timing and first from the top of the figure The timing of figure is consistent.Y-axis indicates desired engine speed and desired engine speed increases along the direction of Y-axis arrow Add.

In time T₁₈, engine stop and desired face of fluid torque converter speed is zero.In time T₁₈Start later Machine rotation, passes through the circulation of the different strokes of No.1 cylinder.The first time single fuel injection during No.1 compression stroke cylinder Amount is supplied directly to No.1 cylinder.It is sent out from during first compression stroke after engine stop from first combustion incident Motivation starts to accelerate.

In time T₁₉, fuel injection twice is provided during second compression stroke of No.1 cylinder.Fuel injection response Speed difference between desired engine speed and actual engine speed is converted to be sprayed twice.Moreover, being decided by reality Fuel injection is provided during the cylinder stroke of difference between border and desired engine speed.In one example, it is used for root Be stored in table according to the fuel injection timing of the cylinder stroke of the difference between actual and desired engine speed and according to Speed difference exports cylinder stroke.By in the feelings that fuel injection occurs according to the difference between actual and desired engine speed Cylinder stroke is adjusted under condition, fuel mixing and engine speed control during engine start can be improved.

In time T₁₉And T₂₀Between, it is poor into one between actual engine speed and desired engine speed to respond Step section fuel injection timing.It can be seen that from the fuel injection twice during compression stroke cylinder to during induction stroke The fuel injection variation of primary fuel injection during primary fuel injection and compression stroke.Moreover, fuel injection be converted into Injection fuel twice during gas stroke.

In time T₂₀, it is desirable to engine speed and actual engine speed between engine speed error become zero And each cylinder cycle injection fuel is primary.In this way it is possible to which responding engine speed error is adjusting fuel injection just When, to provide fuel during different engine strokes.Furthermore, it is possible to respond power train disconnect-type clutch state or application Power adjust fuel injection timing and spark timing, it is just as discussed with respect to FIG. 13.

The method and system for also providing Fig. 1-3 and Figure 13-14 is used to adjust the cylinder air inlet of engine, comprising: in order to send out The position of motivation starting positioning air throttle；It adjusts with by cylinder fuel injection timing to desired engine speed and reality Engine speed between difference variation and the cylinder stroke that changes, and respond and be supplied to by the adjusting of the air capacity of air throttle The amount of the fuel of the cylinder.This method includes that the stroke of cylinder changes to induction stroke from compression stroke.This method includes the solar term Door is air inlet air throttle.

In some instances, air inlet air throttle is at least during this method further includes fuel injection during compression stroke Partly it is closed.This method further include during the fuel injection during the induction stroke of cylinder air inlet air throttle be open 's.This method further include during one of cylinder circulation fuel injection timing fuel injection twice is at least provided.This method packet It includes fuel injection timing and is supplied to the fuel nozzle injected fuel directly into the cylinder.

The method and system for also providing Fig. 1-3 and Figure 13-14 is used for the cylinder air inlet of engine, comprising: for engine The position of starting positioning air throttle；Spark is provided to the combustion chamber of cylinder during one, cylinder circulation；With adjusting fuel injection Timing with engine start acceleration period keep when the engine speed increases spark and fuel injection terminate between substantially not When the time quantum of change sprays multiple fuel impulse during one, cylinder circulation simultaneously；And the air capacity that response passes through air throttle Adjust the fuel quantity for being supplied to cylinder.In this way it is possible to keep burning consistency.

This method further includes that fuel injection timing is shifted to an earlier date when the engine speed increases.This method further includes fuel spray Timing is penetrated corresponding to desired engine speed, and desired engine speed is based on face of fluid torque converter speed.The party Method further includes the closure power train disconnect-type clutch when engine speed is in the threshold velocity of face of fluid torque converter speed. This method further includes spraying the cylinder stroke of multiple fuel impulse therebetween to change as engine speed changes.This method is also wrapped It includes and changes in engine start acceleration period spark timing.This method further include air throttle be arranged in inlet manifold downstream into Port air throttle.

The method and system of Fig. 1-3 and Figure 13-14 also provides a kind of hybrid vehicle system, comprising: engine；Including It is connected mechanically to the double mass flywheel (DMF) of the first side of the engine；Second side including being connected to the double mass flywheel The first side power train disconnect-type clutch；The first side including being connected to second side of the power train disconnect-type clutch Power train integrated actuating machine/generator (DISG)；And the controller including executable non-transient instruction, desired by response For engine speed to cylinder adjustment fuel injection timing, which is based on face of fluid torque converter not mechanically It is connected to face of fluid torque converter speed when engine.

The hybrid vehicle system further includes additional instruction, in engine speed in face of fluid torque converter speed Threshold velocity in after be closed the power train disconnect-type clutch.The hybrid vehicle system include the engine pass through through The engine is rotated by the starter except the DISG and is started.The hybrid vehicle system further includes additional instruction, with Fuel injection timing is adjusted to be maintained at a cylinder cycle when the engine speed increases in engine start acceleration period Period is delivered to the substantially invariable time quantum between the spark timing of cylinder and the fuel injection ending timing for being delivered to cylinder, And multiple fuel impulse is sprayed during the cylinder cycle.The hybrid vehicle system further includes additional instruction, will Cylinder fuel injection timing is adjusted to the difference variation between desired engine speed and actual engine speed and becomes The cylinder stroke of change, and respond the fuel quantity for adjusting by the air capacity of air throttle and being supplied to the cylinder.The hybrid electric vehicle System further includes additional instruction, with before first combustion incident of the cylinder after engine stop in the vapour To the single fuel impulse of the cylinder injection during the compression stroke of cylinder.

Referring now to Figure 15, Figure 15 is shown after shifting of transmission, when the torque provided by motor cannot mention When for desired amount of torque, the flow chart of method for starting.The method of Figure 15 is stored as executable instruction In the non-transient memory of controller 12 in fig. 1-3.

1502, method 1500 judges whether hope or order transmission upshifts.In one example, speed changer changes Top gear order can change the control variable of state by response car speed, the gear for requiring torque and currently selecting come really It is fixed.If transmission up-shift is wished in control variable instruction, method 1500 proceeds to 1506.Otherwise, method 1500 proceeds to 1504。

1504, method 1500 determines transmission output shaft speed and face of fluid torque converter speed according to desired torque Degree is used for next upcoming shifting of transmission.In one example, the speed change selected via accelerator pedal, currently The desired torque that device shelves and car speed provide is for determining the speed changer output speed for being used for next transmission up-shift With the basis of pump impeller speed.Specifically, speed changer output speed and next gear can be true from the gear and speed currently selected Fixed, speed changer plan at this time upshifts in the next gear for wishing motor torque level.Gear shift plan can be rule of thumb It determines and stores in memory, memory output which shelves under current speed and desired level of torque are selected It selects.The car speed of future time can be deduced according to y=mx+b according to the rate of change or slope of current vehicle speed and speed, Middle y is the speed of prediction, and m is speed slope, and b is speed compensation.It equally, can be with to pump impeller speed desired by time in the future Deduce.(for example, the current time adds 0.2 second, and assume to increase car speed when time from the current time of interpolation increases And/or desired torque) when, gear shift plan can order upshift to higher shelves (for example, from first grade to second gear) conduct Index the variable of gear shift plan variation.According to gear shift plan when the variation of the transmission gear of selection, shifting of transmission is occurring When interpolation time quantum (such as time of projection) and new shelves number, the speed deduced and the desired torque deduced stored up It is stored in memory.Transmission output shaft speed is determined from new gear (such as upshift gear), any axle ratio and speed.Become Fast device pump impeller speed can be from DISG prediction of speed, because DISG is connected mechanically to the pump impeller.In transmission pump wheel speed and Method 1500 proceeds to 1506 after transmission output shaft speed is determined.

1506, method 1500 determines speed, transmission (for example, pump impeller speed and output shaft speed) and for next The gear ratio of torque-demand in transmission up-shift gear.Method 1500 determines transmission output shaft speed according to following equalities:

OSS=OSS_when_commanded+OSS_ change rate * time_to_shift；

Commanded_gear=gearfn(vs,dsd_tor)；

TSS_after_upshift=OSS*Commanded_gear；

Wherein OSS is transmission output shaft speed, and OSS_when_commanded is that the speed changer when order upshift is defeated Axle speed out, ime_to_shift are time quantums needed for gear shift, and Commanded_gear is the gear that upshift works later, Gearfn is the function of the gear of return command, and vs is car speed, the gear-box input torque that dsd_tor is desirable to, and TSS_after_upshift is transmission output shaft speed after upshift.Function fn keeps speed changer with its operation according to warp Test determining gear shelves.Method 1500 proceeds to 1508 after speed, transmission and gear ratio are determined.

1508, method 1500 determines the desired Transmission output shaft torque and transmission turbine axis turn after upshift Square.In one example, method 1500 determines gear-box output torque and turbine shaft torque according to following equation:

OUTq_dsd=outfn(accel_pedal,TSS_after_upshift)；

Turq_dsd=OUTq_dsd*mult+offset；

The wherein Transmission output shaft torque that OUTq_dsd is desirable to, outfn are to return to desired transmission output shaft to turn The function of square, accel_pedal are to provide the accelerator pedal position of desired torque, and TSS_after_upshift is upshift Transmission output shaft speed later, the transmission turbine shaft torque that Turq_dsd is desirable to, mult and offset are previously stored The empirically determined ginseng in function indexed by the gear of order, transmission oil temperature and transmission output shaft speed Number.Method 1500 proceeds to after the transmission turbine shaft torque after desired Transmission output shaft torque and upshift is determined 1510。

1510, method 1500 judges whether converter clutch (TCC) will be open after upshift.Show at one In example, method 1500 judges that TCC whether will after upshift according to empirically determined gear shift plan stored in memory It is open.For example, gear shift plan can plan closure according to current shelves, next scheduled shelves and desired torque Fluid torque-converter.If method 1500 judges that TCC will be open after upshift, answer is "yes" and method 1500 into It goes to 1512.Otherwise, answer is "No" and method 1500 proceeds to 1514.

1512, method 1500 determines the face of fluid torque converter torque of order.In one example, the fluid power of the order Table retrieval of the converter pump torque from storage in memory.The table turns comprising empirically determined face of fluid torque converter The value of square, these values pass through the transmission output shaft speed and desired turbine shaft torque index after upshift.In the pump impeller of order Method 1500 proceeds to 1516. after torque is determined

1514, method 1500, which adjusts desired face of fluid torque converter torque to desired transformer turbine, to be turned Square, because TCC is in lock state.Method 1500 proceeds to after desired face of fluid torque converter torque is determined 1516。

1516, method 1500 judges whether desired face of fluid torque converter torque will require after transmission up-shift Engine combustion air-fuel mixture.In one example, method 1500 compares DISG in current battery charge state The amount of torque and desired face of fluid torque converter torque that capacity provides.If it is desired to face of fluid torque converter torque be greater than or In the threshold torque amount of DISG torque capacity, then answer is "yes" and method 1500 proceeds to 1520.Otherwise, answer is "No" and method 1500 proceeds to 1518.

1518, method 1500 can enable the engine to stop rotating according to current operating condition or method 1500 can be with Enable the engine to the air-fuel mixture that burns away.In one example, the feelings of warm-up operations are had reached in engine Under condition, as it is desirable that face of fluid torque converter torque engine is not required to run, engine stop rotation.When engine does not have Have that when reaching warm-up operations, engine can burn away.Allow or stop according to the incoherent operating condition of shifting of transmission Method 1500, which proceeds to, after engine rotation exits.

1520, method 1500 judges whether start engine before transmission up-shift.In the shape of transmission clutch State (for example, not including power train disconnect-type clutch) can star engine before being conditioned, to send out in shift end Motivation torque can pass to wheel.Alternatively, change during upshift in one or more transmission clutch and run It can star engine when state.In one example, when shift time is longer than expected for expected engine flower Between come when generating positive torque, can be opened before engine upshift starts and before transmission clutch starts change state Dynamic engine.If method 1500 judges to wish to start engine before transmission up-shift, method 1500 proceeds to 1522. Otherwise method 1500 proceeds to 1526.

1522, method 1500 starts engine and couple drive system disconnect-type clutch.The engine can pass through It is rotated the engine with the starter with the power output capacity lower than DISG or rotation engine is started by DISG and opened It is dynamic.Moreover, shifting of transmission can postpone until engine speed is synchronous with DISG or pump impeller speed.If in resignation (resignation) Motor torque increases before clutch discharges completely, and it is dry that delay shifting of transmission can reduce the drive train torque that may occur It disturbs.Method 1500 proceeds to 1524 after engine start and power train disconnect-type clutch unclamp.

1524, method 1500 makes transmission up-shift after the engagement of power train disconnect-type clutch.Speed changer can be borrowed Help that one or more clutches for influencing torque transfer by speed changer are applied and/or released stress to make speed changer liter Shelves.Method 1500, which proceeds to, after shifting of transmission exits.

1526, if the situation for stopping engine rotation other than upcoming transmission up-shift exists, Method 1500 prevents engine stop.In other words, only transmission up-shift else if engine is command by stopping, then Speed changer stops engine rotation and is prevented from.In addition, a moment after upshift has begun unclamping (for example, be relieved of one's office Clutch (period inertia phase) is taken in (torque phase) or application during clutch) it can star engine to mention to power train For additional torque to meet torque-demand.Engine and DISG torque can be adjusted to provide desired fluid torque-converter pump Take turns amount of torque.After transmission up-shift starts, after engine stop is prevented from or after the start of engine method 1500 proceed to and exit.

In this way, method 1500 can predict shifting of transmission and desired face of fluid torque converter torque with determination When power train disconnect-type clutch and starting engine are closed.Method 1500 enables motor torque and DISG torque It seamlessly combines, to provide smooth acceleration during shifting of transmission.

Referring now to Figure 16, Figure 16 is shown for determining when starting example engine according to method shown in figure 15 The curve graph of property timing.The timing of Figure 16 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 16 indicates the graph of relation of desired drive train torque and time.Desired biography Dynamic is that torque can be desired face of fluid torque converter torque, desired transformer turbine torque, desired wheel turn Square or other drive train torques.The desired drive train torque can be determined from accelerator pedal position or other input units. Solid-line trace 1602 indicates desired drive train torque.The trace 1604 of dotted line indicates the desired drive train torque (example of prediction Such as, the hope drive train torque after speed changer gear shift).Drive train torque is wished in Y-axis expression and it is desirable that power train turns Square increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.Horizontal line 1606 indicate the torque limit that power train can be supplied to by DISG.

The second figure from the top of Figure 16 indicates the graph of relation of speed changer shelves and time.Y-axis indicates speed changer shelves And specific speed changer shelves are shown along Y-axis.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.It is real Stitching line 1608 indicates current or actual speed changer shelves.Dotted line trace 1610 indicates prediction or future speed changer shelves.

Third figure from the top of Figure 16 indicate there is no the hope engine condition of speed changer gear shift situation and when Between graph of relation.Y-axis indicates desired engine condition and for engine condition desired by higher trace level It is operating status and is shutdown status for lower trace level.X-axis indicates time and time from the left lateral view of figure Right side increases.

The 4th figure from the top of Figure 16 is indicated based on the desired engine condition of all situations and the relationship of time Curve graph.Y-axis indicates desired engine condition and is run mode for engine condition desired by higher trace level It and is shutdown status for lower trace level.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.

The 5th figure from the top of Figure 16 indicates the graph of relation of engine condition and time.Desired by Y-axis expression Engine condition and be run mode and horizontal for lower trace for engine condition desired by higher trace level It is shutdown status.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.

In time T₂₁, it is desirable to drive train torque be greater than and can be supplied to the torque of the power train by DISG.At speed changer In fifth speed and desired engine condition and there is no both desired engine conditions of gear situation to be at expression Wish the higher level of engine operation.Engine condition is in the higher level for indicating that engine is currently running.

In time T₂₁With time T₂₂Between, it responds drive train torque desired by reduced driver's input (not shown) and subtracts It is few.Speed changer is from fifth speed downshift to second gear and the speed changer shelves of prediction are directed toward current or actual speed changer shelves.No There are the desired engine condition of gear situation and desired engine condition is maintained at higher level.

In time T22, there is no the transmission state of gear situation response car speeds and desired drive train torque to turn Reduced levels are changed to, indicate (such as to apply if vehicle and engine operating condition can be responded without transmission gear situation engine Add it is dynamic, do not apply accelerator pedal and car speed and be less than threshold velocity) stop.Desired engine condition is also converted to Reduced levels, to indicate that response includes that the operating condition of the speed changer shelves of prediction stops engine.Engine desired by engine response State and stop.

In time T₂₂With time T₂₃Between, it is desirable to drive train torque held stationary and then increase.When desired biography Dynamic when being torque increase, the speed changer shelves of prediction rise to third gear from second gear.Current speed changer shelves are maintained at second gear. As it is desirable that engine condition and there is no the desired engine conditions of gear situation to be kept low, therefore start Machine keeps stopping.

In time T₂₃, after the level greater than 1606 that is shifted to, it is desirable to engine condition response prediction it is desired Drive train torque increases and is converted to higher level.Engine can respond the transformation of the desired engine condition and start. There is no the desired engine conditions of gear situation to be kept low, to indicate if do not increased after shifting of transmission Add desired desired drive train torque engine that will remain shut off.

In time T₂₃And T₂₄Between, it is desirable to drive train torque increase and be then responding to reduce it is driver requested (not Show) and reduce.Desired drive train torque is reduced to the level less than 1606 and is maintained close to level 1606.Speed changer From fifth speed downshift to third gear.Desired engine condition and there is no the desired engine conditions of gear situation to be maintained at Higher level, therefore engine remains operational.

In time T₂₄, it is desirable to engine condition be converted to lower level, to indicate that it is desired that engine can respond Drive train torque, car speed (not shown) and apply braking (not shown) and stop.It is desirable, however, that engine condition The desired drive train torque of response prediction, which increases to, is maintained at higher level greater than 1606 level, as shifting of transmission arrives What fourth speed was predicted.Therefore, engine stop is prevented from.When vehicle is moving and when driver's pine accelerator pedal Such case can occur.

In time T₂₄And T₂₅Between, it is desirable to drive train torque increase and then reduce.Speed changer response driver wants Torque, car speed (not shown) and on-position the (not shown) gear shift between third and fifth speed asked.There is no gears The desired engine condition of situation and desired engine condition respond desired drive train torque and are maintained at higher level.

In time T₂₅, it is desirable to drive train torque respond lower driver requested (not shown) and be reduced to less than level 1606.There is no the desired engine condition of gear situation and desired engine condition respond desired drive train torque, Brake pedal status (not shown), car speed (not shown) are converted to lower level, indicate that engine will be stopped.Start Machine responds desired engine condition and stops.

In time T₂₅And T₂₆Between, it is desirable to drive train torque gradually increase and respond the increased drive train torque The speed changer shelves of prediction are increased to third gear from second gear.Desired engine condition and desired hair there is no gear situation Motivational state is maintained at lower level, and engine keeps stopping.

In time T₂₆, it is desirable to engine condition be converted to higher level, and engine response is increased desired Drive train torque and the speed changer shelves of prediction and start.There is no the desired engine conditions of gear situation to be maintained at low water It is flat, to indicate after the shifting of transmission of prediction if the desired drive train torque being not previously predicted is added to greater than 1606 Level, engine will not start.By starting engine before practical gear shift, desired biography can be provided after gear shift Dynamic is torque.

In this way, it can star engine before gear shift to provide desired drive train torque after gear shift. Moreover, this method prediction gear shift makes that engine can be started before the drive train torque desired by real require.It opens earlier Dynamic engine can permit engine and reach its situation that can be met desired drive train torque with output torque.

The method and system of Fig. 1-3 and Figure 15-16 provides the method for starting engine, comprising: prediction shifting of transmission it Desired torque afterwards；Start with starting if the desired torque after the shifting of transmission of prediction is greater than the threshold value of torque Machine.This method includes that the desired torque is face of fluid torque converter torque, and predicts that desired torque is with starting rotation Torque is provided to vehicle in power train integrated actuating machine/generator, and speed changer is in drive shift and vehicle mobile During situation.This method includes that desired torque is predicted according to scheduled shifting of transmission plan.

In some instances, this method includes that the rotation of engine is started by power train disconnect-type clutch.This method It is disconnected before rotating engine including the power train disconnect-type clutch.This method includes that the power train disconnect-type clutch exists It is arranged in hybrid vehicle driver between double mass flywheel and power train integrated actuating machine/generator.Include in method Engine before shifting of transmission the desired drive train torque of response prediction and rotate.

The method and system of Fig. 1-3 and Figure 15-16 is provided for starting engine, comprising: pass to vehicle by motor Dynamic system provides torque；Predetermined transmission up-shift；If being greater than torque with torque desired after scheduled transmission up-shift Threshold quantity, responds the engine rotation that scheduled transmission up-shift starting stops, and the desired torque be based on open Move power train integrated actuating machine/generator turn after the transmission up-shift timing of the related engagement transmission clutch of engine Square.This method includes that the motor is that power train integrated actuating machine/generator (DISG) and the DISG are separated in the power train Position between formula clutch and speed changer is arranged in the hybrid vehicle.

In some instances, this method includes by being at least partly closed the power train disconnect-type clutch, the DISG Torque is provided to start the engine rotation of stopping.This method further includes the transmission up-shift after starting engine rotation.It should Method further includes that the speed changer is double jackshaft-dual-clutch transmissions.This method includes that the speed changer is automatic transmission.It should If method further includes desired after the transmission up-shift timing for engaging transmission clutch related with starting engine Torque is less than the threshold quantity of torque, then permission machine is made to stop rotating.

The method and system of Fig. 1-3 and Figure 15-16 provides a kind of hybrid vehicle, comprising: engine；Including mechanically It is connected to the double mass flywheel of the first side of the engine；Mechanically including being connected to the first of second side of the double mass flywheel The power train disconnect-type clutch of side；It mechanically include first side of the second side for being connected to the power train disconnect-type clutch Power train integrated actuating machine/generator；And controller, the controller include executable non-transient instruction, it is predetermined to respond Transmission up-shift after desired torque start the engine by being closed the power train disconnect-type clutch, response is predetermined Transmission up-shift start the engine before shifting of transmission.Such system can improve the power train response time.

In one example, which further includes additional instruction, if in scheduled speed changer liter The front engine of shelves is rotating, and prevents to stop engine rotation.The hybrid vehicle system includes that response is closed the transmission It is that disconnect-type clutch starts the engine by rotating the engine via power train integrated actuating machine/generator.This is mixed Closing power car system includes additional instruction, to make transmission up-shift after the start of engine.The hybrid vehicle system System further includes additional instruction, allows engine stop to respond the desired torque after scheduled transmission up-shift.This is mixed Closing power car system further includes additional instruction, is pre with delay start engine direct to scheduled shifting of transmission small In the time of threshold amount of time.

Referring now to Figure 17, Figure 17 is shown for starting engine to reduce speed changer input during shifting of transmission The flow chart of method.The method of Figure 17 can be stored in non-transient memorizer shown in Fig. 1-3 as executable instruction.Figure 17 method can reduce the amplitude and/or number that torque variation occurs for the DISG during vehicle operation, to be limited in speed changer The torque of speed changer is applied to during gear shift.

1702, method 1700 judges whether engine restarts and whether wish transmission up-shift.For example, when requiring Drive train torque increase or engine can be required to restart when the driver releases the brake pedal.For example, speed changer liter Shelves can respond car speed and drive train torque demand to require.In one example, shifting of transmission plan is according to warp It tests determining and stores in memory to be indexed by car speed and drive train torque demand.Become if method 1700 determines Fast device upshifts and requires engine start, then method 1700 proceeds to 1704.Otherwise, method 1700, which proceeds to, exits.

1704, method 1700 judges whether DISG can be used.According to the DISG status indicator in memory, method 1700 can To judge whether DISG can be used.Alternatively, method 1700 can decide whether according to the operating condition of such as battery charge state DISG can be used.For example, DISG may be disabled if SOC is less than threshold level.In another example, if DISG temperature is higher than threshold value, then DISG may be disabled.If the judgement of method 700 can use DISG, answer is "yes" simultaneously And method 1700 proceeds to 1712.Otherwise, answer is "No" and method 1700 proceeds to 1706.

1706, method 1700 discharges (off-going) clutch of being relieved of one's office at a predetermined rate.The resignation clutch is rising It is lower shelves between working days.For example, resignation clutch unclamps second gear clutch during second gear rises third gear.Clutch pine Opening rate can be empirically determined and stores in memory so that the resignation clutch when being upshiftd can To be stored in the release of memory medium-rate.Method 1700 proceeds to 1708 after unclamping resignation clutch.

1708, method 1700 start using take over (on-coming) clutch with from unclamp the resignation of the order from Higher shelves have been engaged since clutch after scheduled time quantum.This, which takes over clutch, this can take over clutch by increase supply Oil pressure apply.Scheduled time quantum can be empirically determined and store in memory in order to sharp during upshift With.In one example, clutch is taken over by accelerating the outlet side of the resignation clutch in the abrasion for reducing resignation clutch A possibility that when apply.Method 1700 after clutch starts, which is taken over, in application proceeds to 1710.

1710, method 1700 is with the rate application of control or starts to be closed power train disconnect-type clutch to reduce speed change Device input torque.Specifically, engine is applied by input side of the closure power train disconnect-type clutch to fluid torque-converter Load, to reduce the speed of face of fluid torque converter speed.In this way, to pass to speed changer by fluid torque-converter defeated The amount of torque for entering axis is reduced.In one example, power train disconnect-type clutch when application power train disconnect-type clutch Rate can be adjusted according to face of fluid torque converter speed.For example, increasing power train disconnect-type clutch applying pressure until liquid Until power torque converter pump wheel speed is reduced to threshold quantity and then power train disconnect-type clutch applying pressure is not further added by.By Engine is passed to engine, therefore from speed changer from the transmitting torque of the input side of speed changer in power train disconnect-type clutch Amount of torque limited according to the pump impeller speed.Increasing power train disconnect-type clutch applying pressure and the power train point Method 1700 proceeds to 1722 after being at least partly closed from formula clutch.

1712, method 1700 unclamps resignation clutch at a predetermined rate.Resignation clutch is unclamped to make it possible to apply Higher shelves are transmitted without torque via two different shelves.Resignation clutch can be empirically determined and store In memory for being retrieved during upshift.Method 1700 proceeds to 1714 after unclamping resignation clutch and starting.

1714, method 1700 increases DISG output torque to increase the torque for being supplied to face of fluid torque converter.One In a example, DISG torque increases the amount of torque for being used to that engine is accelerated to desired engine speed.The DISG torque is logical It crosses and increases the amount of the electric current for being supplied to DISG and increase.In other examples, DISG output torque can be reduced to lower change Fast device input torque.After increasing DISG torque, method 1700 proceeds to 1716.

1716, method 1700, which starts to apply, takes over clutch with scheduled after the resignation clutch from release command Higher shelves are engaged after time quantum.This is taken over clutch and can be supplied to the oil pressure for taking over clutch by increasing and answer With.Scheduled time quantum can it is empirically determined and store used during upshift in memory.Show at one In example, clutch is taken over by accelerating the outlet side of the resignation clutch a possibility that reducing the abrasion of the resignation clutch When apply.Method 1700 after clutch starts, which is taken over, in application proceeds to 1718.

1718, method 1700 is with the rate application of control or starts to be closed power train disconnect-type clutch to reduce speed change Device input torque and acceleration motor are to desired starting velocity of rotation.Specifically, engine passes through closure power train point Apply load from input side of the formula clutch to fluid torque-converter, to reduce the speed of face of fluid torque converter.Power train point The adjustable torque transfer to control the power train disconnect-type clutch two sides of pressure applied from formula clutch.Moreover, working as Whenever take over can apply power train disconnect-type clutch during the inertia phase of gear shift when clutch is just closed.

In one example, when application power train disconnect-type clutch, the power train disconnect-type clutch application rate can To be adjusted according to face of fluid torque converter speed.Since power train disconnect-type clutch is given from the transmitting torque of the input side of speed changer The amount of engine, the torque transmitted to engine is limited according to pump impeller speed.In another example, based on be supplied to transmission Be the input torque of disconnect-type clutch amount and power train disconnect-type clutch apply the torque to transmitting of pressure it is related Power train disconnect-type clutch transmission function multiplied by DISG torque, to determine that passing to engine starts the engine The amount of torque.Power train disconnect-type clutch application rate can be adjusted, and the starting rotational torque made it desirable to is via DISG Engine is supplied to power train disconnect-type clutch.

In yet another example, power train disconnect-type clutch application rate can speed according to DISG and desired hair Motivation speed accelerates rate control.For example, when via DISG speed and desired engine acceleration index, power train separation Formula clutch application rate can be from the table index of empirically determined output power train disconnect-type clutch application rate.? Method 1700 proceeds to 1720 after starting the application of power train disconnect-type clutch.

1720, during or after the inertia phase of transmission up-shift, method 1700 adjusts DISG torque via liquid Power converter pump provides desired gear-box input torque.If engine quality is higher, DISG output, which can increase, to be made Gear-box input torque is obtained not reduce more than desired value.If engine quality is relatively low, DISG torque, which can be reduced, to be made It obtains gear-box input torque and reduces desired amount.DISG torque can by increase or decrease currently be applied to the electric current of DISG come It adjusts.Method 1700 proceeds to 1722 after adjusting DISG torque.

1722, method 1700 is opened when by reaching threshold velocity to engine supply fuel and spark engine speed Dynamic engine.In one example, the starter except DISG can be engaged in engine, when engine is activated to provide Torque other than being supplied to the torque of engine by power train disconnect-type clutch allows to reach desired engine Start velocity of rotation.Method 1700, which proceeds to, after the start of engine exits.

In this way, Transmission output shaft torque can reduce during the inertia phase of gear shift, therefore can reduce Drive train torque interference.Start engine by closure power train disconnect-type clutch and reduce transmission input shaft torque, therefore Transmission output shaft torque can be reduced in the inertia phase of gear shift.

Referring now to Figure 18, Figure 18 is shown starts the exemplary of engine according to the method for Figure 17 during shifting of transmission Timing.The timing of Figure 18 can be provided by the system of Fig. 1-3.When dotted line trace is invisible, dotted line trace and solid-line trace are With.

The first figure from the top of Figure 18 indicates the graph of relation of transmission input shaft torque and time.In speed changer The torque of input shaft is equal to the torque of speed changer transformer turbine.Y-axis indicates transmission input shaft torque and speed changer is defeated Enter shaft torque to increase along the direction of Y-axis arrow.X-axis indicates the time and the time increases to the right from the left side of figure.Solid line mark Line 1802 indicates not start engine by closure power train disconnect-type clutch or provides what transmission input shaft torque was reduced Transmission input shaft torque.Dotted line trace 1804 indicate when by be closed the power train disconnect-type clutch start engine and Speed changer input torque when being shifted to more high-grade.

The second figure from the top of Figure 18 indicates the graph of relation of Transmission output shaft torque and time.Y-axis indicates Transmission output shaft torque and Transmission output shaft torque increase along the direction of Y-axis arrow.X-axis indicates time and time Increase to the right from the left side of figure.Solid-line trace 1806 indicate by closure power train disconnect-type clutch start engine or The Transmission output shaft torque of transmission input shaft torque reduction is provided.Dotted line trace 1808 is indicated when by being closed the power train Transmission output shaft torque when disconnect-type clutch starts engine and is shifted to more high-grade.

Third figure from the top of Figure 18 indicates the graph of relation of power train disconnect-type clutch state and time.Y Axis indicates power train disconnect-type clutch state, and is wherein open and leans on close to the X-axis power train disconnect-type clutch It is closure at the top of nearly Y-axis.The torque transmitted when power train disconnect-type clutch closure by power train disconnect-type clutch Amount increase.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.

The 4th figure from the top of Figure 18 indicates the graph of relation of engine speed and time.Y-axis indicates engine Speed and engine speed increase along the direction of Y-axis arrow.X-axis indicates the right side of time and time from the left lateral view of figure Side increases.

The 5th figure from the top of Figure 18 indicates the graph of relation of DISG torque and time.Y-axis indicates DISG torque And DISG torque increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases from the right side of the left lateral view of figure Add.

In time T₂₇, speed changer not gear shift and engine stop.DISG is to power train output torque and speed change Device input shaft and output shaft torque, are constant.

In time T₂₈, speed changer response shifting of transmission plan, desired drive train torque (not shown) and car speed (not shown) starts gear shift.Gear shift is started by unclamping resignation clutch.For example, during being raised to third gear from second gear, Third gear (taking over clutch) is unclamped by the second gear clutch (resignation clutch) before applying.Transmission input shaft torque is protected Hold it is constant, although it can increase to preferably keep Transmission output shaft torque in some instances.Gear-box output torque Response unclamps the resignation clutch and starts to reduce.The power train disconnect-type clutch is shown to be open and engine stops Only.DISG torque is shown to be maintained at constant level.

In time T₂₉, inertia phase unclamps the application of resignation clutch by response and takes over clutch and start.When taking over clutch The power train disconnect-type clutch starts to be closed when device is applied and starts closure.Since some DISG torques are via the power train To rotate engine, transmission input shaft torque, which is also shown as, responds the power train disconnect-type clutch for disconnect-type clutch transmitting It is closed and reduces.Engine speed response drive train torque is applied to engine and starts to increase.DISG torque is illustrated in perseverance Fixed level.

* in time T₂₉With time T₃₀Between, it power train disconnect-type clutch state is shown is adjusted to control and be applied to hair The amount of the drive train torque of motivation.The pressure that power train disconnect-type clutch applies can respond engine speed and/or speed change Device output shaft speed is adjusted, to reduce drive train torque interference during the gear shift and engine start.Spark and fuel are (not Show) it is also supplied to the engine, so that engine speed reaches DISG speed.When power train disconnect-type clutch by application with Transmission output shaft torque gradually increases when restarting engine, as shown in dotted line 1808.If during inertia phase not Using power train disconnect-type clutch, Transmission output shaft torque changes in response to gear ratio and is increased.Therefore, in the inertia phase phase Between using power train disconnect-type clutch can reduce drive train torque interference.

In time T₃₀, when taking over clutch (not shown) and being applied completely by the way that gear-box output torque is converted to perseverance The inertia phase of definite value shifting of transmission terminates, as shown in the figure.DISG torque is also shown as the completion in response to gear shift and increases, because This vehicle can restart to accelerate.

In this way it is possible to which the drive train torque during reducing gear shift interferes.Moreover, the energy in power train can be used Start engine, therefore DISG can provide less torque to start engine.

The method and system of Fig. 1-3 and Figure 17-18 provides shifting of transmission, comprising: response transmission up-shift requires will hair Motivation is connected to speed changer.In this way it is possible to which it is defeated to control speed changer during gear shift to reduce transmission input shaft torque Shaft torque out.The front engine that this method is included in requirement transmission up-shift is not attached to speed changer, vehicle of the speed changer in movement In and it is in drive shift, and vehicle continues to move to and transmission up-shift is to higher shelves.This method includes engine Speed changer is connected to by the power train disconnect-type clutch being arranged in power train between the engine and fluid torque-converter.

In some instances, this method includes that engine is connected to speed changer during the inertia phase of gear shift.The party Method includes that engine is connected to speed changer after the release of resignation clutch starts during gear shift.This method includes when hair Motivation speed starts the engine when reaching threshold velocity.This method includes that speed changer is automatic transmission, gives automatic transmission Input torque be reduced during gear shift.

The method and system of Fig. 1-3 and Figure 17-18 provides shifting of transmission, comprising: by selectively connecting engine The input axle response transmission up-shift requirement for being connected to speed changer is reduced to the input torque of speed changer, which changes in speed changer Shelves are not attached to speed changer before requiring.This method includes that engine by power train disconnect-type clutch is connected to speed changer. This method includes that the fluid torque-converter in power train is arranged between engine and speed changer.This method further includes during gear shift Increase or decrease the torque of power train integrated actuating machine/generator.This method includes increasing to come from power train integrated actuating machine/hair The torque of motor, to keep the pump impeller speed of fluid torque-converter to be greater than threshold velocity.This method is included in transmission up-shift requirement Stop engine rotation before.

The method and system of Fig. 1-3 and Figure 17-18 provides a kind of hybrid vehicle system, comprising: engine；Including machine Tool it is connected to the double mass flywheel of the first side of the engine；It mechanically include the second side for being connected to the double mass flywheel The power train disconnect-type clutch of first side；The first side and including being connected to second side of the power train disconnect-type clutch Power train integrated actuating machine/generator (DISG) of two sides；It is connected to the speed changer of the DISG；And controller, the controller Including executable non-transient instruction, engine is connected with starting shifting of transmission requirement and responding the shifting of transmission requirement It is connected to the speed changer.

In some instances, which further includes being arranged between the speed changer and DISG in power train In fluid torque-converter.The hybrid vehicle system further includes additional instruction, to start engine.The hybrid vehicle System further includes additional instruction, engine is connected to speed changer by power train disconnect-type clutch.The hybrid power Vehicular system further includes additional instruction, increases DISG torque to respond transmission up-shift requirement.The hybrid vehicle system Further include additional instruction, reduces DISG torque to respond transmission up-shift requirement.The hybrid vehicle system further includes attached Engine is accelerated to desired starting velocity of rotation by the instruction added.

Referring now to Figure 19, Figure 19 is shown for improving vehicle transmission system response when power train includes double mass flywheel Method.The method of Figure 19 can be stored in the non-transient memory of controller 12 shown in Fig. 1-3 as executable instruction.

1902, method 1900 determines operating condition.Operating condition can include but is not limited to engine speed, DMF is output and input Speed, the drive train torque of requirement, DISG torque, power train disconnect-type clutch state and engine speed.Determining work Method 1900 proceeds to 1904 after condition.

1904, method 1900 determines the upstream of the DMF or speed and/or the position of engine side.Alternative In example, the torque on the upstream side of the DMF can be determined.The speed and/or position can be determined from position sensor.Torque It can be determined by torque sensor.Method 1900 proceeds to after the speed of the upstream side of DMF and/or position are determined 1906。

1906, method 1900 determines the downstream side of the DMF or speed and/or the position of power train disconnect-type clutch side It sets.Alternatively, the torque on the downstream side of the DMF can be determined.It can lead in the speed in the downstream side of DMF and/or position Position sensor is crossed to determine.Torque in the downstream side of DMF can be determined by torque sensor.Speed in the downstream side of DMF Method 1900 proceeds to 1908 after degree and/or position are determined.

1908, method 1900 determines speed, position or the torque differences between the upstream side of the DMF and the downstream side of DMF. In one example, the power train disconnect-type clutch side of DMF is desired speed and/or the position side of the DMF.It should The speed of the engine side of DMF and/or position are subtracted from the speed of the engine side of the DMF and/or position, are existed with providing The DMF speed and/or location error of the two sides DMF.Alternatively, the torque of the engine side of the DMF is from the upstream of the DMF The torque of side subtracts, to provide torque error.In some instances, first side of the DMF and DMF during power train operation The difference of speed/positional can be with the position of the first side of the DMF and DMF when no torque is in the transmitting of the two sides DMF between second side Second side on position be compared.

In another example, the Fast Fourier Transform (FFT) of DMF upstream and downstream speed signal can be carried out and be somebody's turn to do with determining The amplitude or size and frequency of any velocity fluctuation on the upstream side and downstream side of DMF.The two sides DMF velocity error and/or Method 1900 proceeds to 1910 after the speed in frequency and amplitude of DMF upstream and downstream are determined.

1910, method 1900 judges that speed and/or location error or amplitude and frequency are on the DMF upstream and downstream side It is no to be greater than threshold level.If so, method 1900 proceeds to 1912.Otherwise, method 1900, which proceeds to, exits.

1912, whether method 1900 judges power train operating condition in the first human window.For example, upstream and downstream DMF Whether velocity error is greater than first threshold level.In other examples, the torque differences or alternate position spike error of the two sides DMF be can be Determine power train operating condition whether the basis in the first human window.In other example, frequency or Frequency and Amplitude can be with Threshold value is compared.If power train operating condition, in the first human window, method 1900 proceeds to 1914.Otherwise, method 1900 Proceed to 1916.

1914, method 1900 adjust speed changer torque converter clutch (TCC) with weaken speed on DMF and/or Torque oscillation.The TCC can be adjusted by changing the duty ratio of TCC command signal.In other examples, adjust TCC's Frequency.The duty ratio of TCC control command is reduced to increase the sliding of the torque converter clutch two sides, thus increases DMF's Damping.But if when detecting speed/positional difference on DMF TCC slip threshold quantity, by increase the TCC duty ratio life Order can order the TCC to latched position.TCC regulated quantity can be based on the error between desired value and actual value.For example, TCC duty ratio can be adjusted according to the difference between upstream and downstream DMF speed.Method 1900 proceeds to after adjusting TCC It exits.

1916, whether method 1900 judges power train operating condition in the second human window.For example, upstream and downstream DMF Whether velocity error is greater than second threshold level.If power train operating condition, in the second human window, method 1900 proceeds to 1918.Otherwise, method 1900 proceeds to 1920.

1918, method 1900 adjusts the sliding of power train disconnect-type clutch to adjust the damping of the two sides DMF.At one In example, increase the slippage on power train disconnect-type clutch to increase the damping on DMF.But if when detecting speed Power train disconnect-type clutch slides threshold quantity when degree/location error, which is closed completely to enhance The power train.The power train disconnect-type clutch application of force or pressure can according between upstream and downstream DMF speed difference or Difference between the desired and actual value of the variable of such as power train Frequency and Amplitude previously discussed is adjusted.It is driven adjusting It is that method 1900 proceeds to and exits after disconnect-type clutch application of force or pressure.

1920, whether method 1900 judges power train situation in third human window.For example, upstream and downstream DMF Whether velocity error is greater than third threshold level.If so, method 1900 proceeds to 1922.Otherwise method 1900 proceeds to 1924。

1922, method 1900 adjusts the torque of DISG to compensate the speed/positional or torque differences of the two sides DMF.At one In example, if the speed on the engine side of DMF is greater than the speed on the power train disconnect-type clutch side of DMF, The torque output of DISG increases.If the speed on the engine side of DMF is less than the power train disconnect-type clutch side of DMF On speed, then torque from DISG is reduced.In one example, DMF speed, position or torque error are input into output Electric current resistance requires in function or table to adjust DISG torque.And DISG torque increases when the symbol of error is negative.If Undesirable frequency and amplitude are determined, and the torque for being supplied to DISG can be towards 180 degree adjusting to the model of velocity error signal Except enclosing, to weaken undesirable velocity fluctuation.Method 1900, which proceeds to, after adjusting DISG torque exits.

1924, if method of closing 1900 does not increase answering for power train disconnect-type clutch to power train disconnect-type clutch Use rate.By the duty ratio of increase power train disconnect-type clutch control signal, the power train disconnect-type clutch can be closed And applying pressure increases.Method 1900, which proceeds to, after power train disconnect-type clutch closure exits.

In other examples, with adjust the two sides DMF damping while adjustable power train disconnect-type clutch cunning Dynamic, TCC and DISG torque.In this way, when the speed/positional of the two sides DMF, frequency or torque differences or error are greater than threshold value When horizontal, the adjustable one or more brakes of method 1900 are to increase decrease or enhancing power train.

Limitation refers to Figure 20, and Figure 20 shows the exemplary timing for the DMF in the method compensation power train according to Figure 19. The timing of Figure 20 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 20 indicates the graph of relation of car speed and time.Y-axis indicates car speed And car speed increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases to the right from the left side of figure.

The second figure from the top of Figure 20 indicates the graph of relation of power train disconnect-type clutch application of force and time. Y-axis indicates power train disconnect-type clutch application of force and power train disconnect-type clutch application of force along the direction of Y-axis arrow Increase.X-axis indicates the time and the time increases to the right from the left side of figure.

The graph of relation of third chart DMF speed and time from the top of Figure 20.Y-axis indicates DMF speed, and DMF speed increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.

The 4th figure from the top of Figure 20 indicates the graph of relation of TCC application of force and time.Y-axis indicates TCC application Power and TCC application of force increase along the direction of Y-axis arrow.X-axis indicates the right side of time and time from the left lateral view of figure Increase.

The 5th figure from the top of Figure 20 indicates the graph of relation of DISG torque and time.Y-axis indicates DISG torque And DISG torque increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases from the right side of the left lateral view of figure Add.

In time T₃₁, car speed increases and power train disconnect-type clutch is applied completely, this is by power train separate type Clutch application of force is in high-level expression.DMF speed also it is higher horizontal and as at TCC application of force in raised water Shown in flat, TCC clutch closure.DISG torque, which is also at, indicates that the DISG provides the higher of torque to vehicle transmission system It is horizontal.

In time T₃₂, car speed reaches zero and power train disconnect-type clutch is opened to allow the low biography of engine response It is dynamic to be torque-demand (not shown) and stop.When the speed of engine is reduced to zero, DMF speed is also reduced to zero.TCC application Power also reduces so that sliding/slippage/skidding (slippage) occur in fluid torque-converter two sides.DISG torque also reduces, still DISG continues to provide torque to power train to keep the oil pressure in speed changer.In other words, in vehicle and engine DISG torque is transmitted by fluid torque-converter when stopping.The DISG torque rotates transmission oil pump to keep speed changer oil pressure.

In time T₃₃, which is required torque (not shown) by the increase that driver requests and is increased.Vehicle The increased DISG torque of speed responsive starts to increase and power train disconnect-type clutch responds the torque of increased requirement and starts Closure.When power train disconnect-type clutch application of force increases to be closed the power train disconnect-type clutch, DMF speed increases.It is real The DMF speed on border starts to vibrate, and between desired DMF speed and actual DMF speed or the oscillation of desired power train Error between amplitude and actual power train oscillation amplitude increases to the level greater than first threshold.TCC application of force is further Reduce to reduce DMF oscillation and/or velocity error.

In time T₃₃With time T₃₄Between, engine and DISG provide torque to vehicle transmission system.Moreover, power train point From formula clutch holding be closed completely and when engine speed variation when DMF velocity variations.

In time T₃₄, car speed reaches zero and power train disconnect-type clutch is opened to allow the low biography of engine response It is dynamic to be torque-demand (not shown) and stop.When the speed of engine is reduced to zero, DMF speed is also reduced to zero.TCC application Power reduces again so that sliding on fluid torque-converter.DISG torque also reduces.

In time T₃₅, which is increased by the torque (not shown) of driver requested increased requirement. Car speed responds that the increased DISG torque starts to increase and the response of power train disconnect-type clutch increased requires torque Start to be closed.When power train disconnect-type clutch application of force increases to be closed the power train disconnect-type clutch, DMF speed increases Add.Actual DMF speed is to be greater than in time T₃₃Amplitude start to vibrate, and desired DMF speed and actual DMF speed Between or error between desired power train oscillation amplitude and actual power train oscillation amplitude increase to greater than the second threshold The level of value.Power train disconnect-type clutch application of force reduces to reduce DMF oscillation and/or velocity error.

In time T₃₅With time T₃₆Between, the holding of power train disconnect-type clutch is fully opened to allow engine response Underneath drive system torque-demand (not shown) and stop.And DMF speed is also reduced to zero when engine speed is reduced to zero.DISG Torque also reduces.

In time T₃₆, car speed reaches zero and power train disconnect-type clutch is opened to allow the low biography of engine response It is dynamic to be torque-demand (not shown) and stop.When the speed of engine is reduced to zero, DMF speed is also reduced to zero.TCC application Power reduces again so that sliding on fluid torque-converter.DISG torque also reduces.

In time T₃₇, which is increased by the torque (not shown) of driver requested increased requirement. Car speed responds that the increased DISG torque starts to increase and the response of power train disconnect-type clutch increased requires torque Start to be closed.When power train disconnect-type clutch application of force increases to be closed the power train disconnect-type clutch, DMF speed increases Add.Actual DMF speed is to be greater than in time T₃₅Amplitude start to vibrate, and desired DMF speed and actual DMF speed Between or error between desired power train oscillation amplitude and actual power train oscillation amplitude increase to greater than third threshold The level of value.(for example, adjustment) DISG output torque is adjusted to reduce DMF speed.In addition, increased power train separate type clutch The application rate of device application of force can increase to enhance the power train.

In this way it is possible to adjust different actuators to control the drive train torque interference for possibly being present at DMF.It should Different actuators can be adjusted according to the interference (for example, velocity error, torque error, oscillation) measured in DMF.

The method and system of Fig. 1-3 and Figure 19-20 provides hybrid vehicle powertrain systems, comprising: response in engine and The speed of two sides double mass flywheel (DMF) in the hybrid vehicle powertrain systems is set between power train disconnect-type clutch Or torque differences adjust actuator, wherein DMF is the power train part being arranged between engine and power train disconnect-type clutch. In this way it is possible to reduce NVH.

In one example, it is torque converter clutch that this method, which includes actuator,.This method includes that actuator is to pass Assembly is moved into starter/generator.This method includes that actuator is power train disconnect-type clutch.This method includes the two sides DMF Speed difference be arranged in the hybrid electric vehicle from engine position sensor and between the DMF and power train disconnect-type clutch Position sensor in power train determines.This method includes that power train disconnect-type clutch is integrated in the DMF and power train It is arranged in the hybrid vehicle powertrain systems between motivation/generator.This method includes that the power train disconnect-type clutch makes Engine is selectively disconnected from power train integrated actuating machine/generator.

The method and system of Fig. 1-3 and Figure 19-20 is used to adjust the operation of hybrid vehicle powertrain systems, comprising: engagement Power train disconnect-type clutch is to pass through motor rotation engine；With response engine and power train disconnect-type clutch it Between be arranged in the hybrid vehicle powertrain systems double mass flywheel (speed or torque differences of the two sides DMF adjust actuator, Middle DMF is the power train part being arranged between engine and power train disconnect-type clutch.This method includes that the motor is The transmission assembly in the hybrid vehicle powertrain systems is arranged in position between power train disconnect-type clutch and speed changer At starter/generator (DISG).This method includes that actuator is DISG.This method includes that DMF passes to motor torque Automatic transmission or double jackshaft-dual-clutch transmissions.This method includes that actuator is activated for the different of different situations Device.This method includes that the frequency component of engine speed signal is basis for adjusting actuator.This method includes the frequency Component is determined via Fast Fourier Transform (FFT) (FFT).

The method and system of Fig. 1-3 and Figure 19-20, which provides, adjusts hybrid vehicle biography system, comprising: engine；It is mechanical Ground includes the double mass flywheel (DMF) for being connected to the first side of the engine；It mechanically include being connected to the double mass flywheel The power train disconnect-type clutch of first side of second side；Including being connected to second side of the power train disconnect-type clutch Power train integrated actuating machine/generator (DISG) of side；And the controller including executable non-transient instruction, with response The difference of the two sides DMF adjusts actuator.

In one example, which further includes the speed changer for being connected to second side of the DMF.This is mixed Closing power car system includes that the difference is and the position of the first side of the DMF when not having torque in the two sides DMF transmitting and this Difference of the position of second side of DMF compared with the position between the first side of the DMF and second side of the DMF.The mixing is dynamic Power Vehicular system includes that the actuator is DISG.The hybrid vehicle system further includes additional executable instruction, to work as The difference of speed between the first side of the DMF and second side increases the power train disconnect-type clutch two sides when being more than threshold velocity Sliding.The hybrid vehicle system further includes additional executable instruction, when between the first side of the DMF and second side The difference of speed when being more than threshold velocity to increase the slidings of torque converter clutch two sides.

The method and system of Fig. 1-3 and Figure 19-20 provides the operation for adjusting hybrid vehicle powertrain systems, comprising: response The engagement of power train disconnect-type clutch adjusts actuator and is arranged between engine and power train disconnect-type clutch with reducing Double mass flywheel (DMF) oscillation, wherein the DMF is between the engine and the power train disconnect-type clutch.

Showing referring now to Figure 21, Figure 21 has for removing with the application of power train disconnect-type clutch and its transmission function The method of the drive train torque interference of pass.The method of Figure 21 can store the control shown in Fig. 1-3 as executable instruction In the non-transient memory of device 12.

2102, method 2100 determines operating condition.The operating condition includes but is not limited to that engine speed, DMF output and input speed Degree, desired drive train torque, DISG torque, DISG speed, power train disconnect-type clutch state, engine speed, fluid power Torque converter pump wheel speed, transformer turbine speed and motor torque.Method 2100 proceeds to after determining operating condition 2104.

2104, method 2100 judges whether power train disconnect-type clutch is open.In memory according to storage Variable or can determine that the power train disconnect-type clutch is open according to the difference between engine speed and DISG speed. If method 2100 judges that the power train disconnect-type clutch is not open, answer is "No" and method 2100 proceeds to It exits.If method 2100 judges that the power train disconnect-type clutch is open, answer is "yes" and method 2100 into It goes to 2106.

2106, method 2100 judges whether to require whether engine start or motor torque are applied to biography by DISG Dynamic system.Engine start can be required when desired drive train torque is greater than threshold torque.Equally, when desired power train turns Square can propose to provide the requirement of motor torque to power train when being greater than threshold torque.If method 2100 judges via DISG It is required that engine start, or if torque is applied to power train by engine, answer is "yes" and method 2100 proceeds to 2108.Otherwise, answer is "No" and method 2100 proceeds to and exits.

2108, method 2100 judges the position shown in Fig. 1-3 in power train with the presence or absence of torque sensor.If There are torque sensors for judgement, then answer is "yes" and method 2100 proceeds to 2110.Otherwise, answer is "No" and method 2100 proceed to 2130.

2110, method 2100 determines power train output torque and reality desired by the selected position along the power train Difference between the power train output torque on border.It in some instances, can be for the position of the selection of power train output torque Face of fluid torque converter, the position between power train disconnect-type clutch and DISG, in transmission output shaft, in hydraulic moment changeable Device turbine, in launch clutch input or other power train position.In the power train position of selection, this is actual or measurement Power train input torque is determined from torque sensor.Desired power train input torque can from accelerator pedal position or other Source determines.The power train input torque that the difference of torque is desirable to subtracts actual power train input torque.

Alternatively, if the torque sensor is arranged between DISG and power train disconnect-type clutch in power train In, DISG torque command may be added to by the torque that torque clutch measures, so that DISG exports additional torque to start hair Motivation, therefore speed changer is provided desired gear-box input torque.Method 2100 proceeds to 2112.

2112, method 2100 adjusts the electric current for being supplied to DISG, so that desired power train input torque is specific Position is supplied to power train, even if the power train disconnect-type clutch transmission function is deteriorated.If fluid torque-converter sensor is used Power train input torque is fed back, increasing when actual power train input torque is less than desired power train input torque should DISG torque.Reduce the DISG torque when actual power train input torque is greater than desired power train input torque.With this Kind mode, the difference responded between desired power train input torque and actual or measurement power train input torque adjust the DISG Torque.

Provided that drive train torque sensor is as feed forward sensor, then torque sensor output turns with desired DISG Square, which is combined, provides desired DISG torque with the power train position in speed changer input or miscellaneous stipulations.In this way, torque Sensor may be arranged to feedback or feedforward means.Method 2100 proceeds to 2114 after DISG torque is conditioned.

2114, method 2100 increases power train disconnect-type clutch pressure to be closed the power train disconnect-type clutch, Therefore engine can start rotation by DISG or power train.The power train disconnect-type clutch is passed through by basis Desired torque index exports the function of power train separation order or application of force to adjust power train disconnect-type clutch pressure.When Engine can also provide spark and fuel 2114 after scheduled speed or position.Increasing the clutch of power train separate type Method 2100 proceeds to 2118 after device pressure.

2116, method 2100 judges whether engine has been started up.In one example, when engine speed is more than threshold It may determine that engine has been started up when value speed.If method 2100 judges that engine has been started up, answer is "yes" simultaneously And method 2100 proceeds to 2118.Otherwise, answer is "No" and method 2100 proceeds to 2110.

2118, method 2100 judges whether engine speed has accelerated to and be equal to DISG speed.Work as engine Velocity sensor and DISG velocity sensor, which are read, may determine that engine when being essentially identical speed (for example, ± 20RPM) Speed is equal to DISG speed.If method 2100 judges that engine speed is equal to DISG speed, answer is "yes" and method 2100 proceed to 2122.Otherwise, answer is "No" and method 2100 proceeds to 2120.

2120, method 2100 is by engine speed modulation to DISG speed.By being adjusted with air throttle and fuel injection Motor torque can be by engine speed modulation to DISG speed.Moreover, by being closed completely power train disconnect-type clutch Adjustable engine speed reaches DISG speed.But transmission is closed completely before engine speed match DISG speed It is that disconnect-type clutch can increase drive train torque interference.After by engine speed modulation to DISG speed, method 2100 proceed to 2118.

2122, method 2100 locks the power train disconnect-type clutch.By answering the power train disconnect-type clutch The power train disconnect-type clutch can be locked with the pressure more than threshold quantity.After locking the power train disconnect-type clutch Method 2100, which proceeds to, to be exited.

2130, method 2100 opens torque converter clutch (TCC).Open the torque converter clutch in order to To estimate the torque in face of fluid torque converter according to fluid torque-converter operating condition.Alternatively, if it is desired to, it can estimate fluid power Torque converter turbine torque.Method 2100 proceeds to 2132 after TCC opening.

2132, DISG is converted to speed control mode from torque control model by method 2100 so that DISG follow it is uncommon The speed of prestige.By carrying out torque adjusting to DISG according to the difference between desired DISG speed and actual DISG speed, DISG follows desired speed.Therefore DISG speed can be adjusted by responding the DISG speed of actual measurement DISG torque come Control.In addition, method 2100 estimates that power train disconnect-type clutch is provided to start the amount of the torque of engine.Start engine Desired amount of torque can it is empirically determined and as transmission function storage in memory.Power train is described by index The function of disconnect-type clutch transmission function, the desired amount of torque for starting engine can be by power train disconnect-type clutch Pass to engine.The power train disconnect-type clutch that function output provides desired power train disconnect-type clutch torque causes Dynamic order.The function is indexed by desired power train disconnect-type clutch torque.Enter speed from torque control model in DISG It spends control model and determines and the amount of torque of engine is supplied to so that engine can by the power train disconnect-type clutch Method 2100 proceeds to 2134 after starting rotation.

2134, method 2100 orders DISG, and to desired speed, (speed is transformer turbine speed and hope Face of fluid torque converter torque function) to realize desired face of fluid torque converter torque.Desired fluid torque-converter pump Taking turns torque can determine from accelerator input or controller (for example, it is desirable to drive train torque).Desired DISG speed can be with Function by indexing the operation of one or more description fluid torque-converters determines (see Figure 45-47).Specifically, hydraulic moment changeable The ratio between device turbine trip speed and face of fluid torque converter speed by fluid torque-converter capacity factor (such as fluid torque-converter transmit letter Number) multiply.Then the result is multiplied by face of fluid torque converter velocity squared, to provide face of fluid torque converter torque.

Therefore, when known to fluid torque-converter capacity factor, face of fluid torque converter torque and transformer turbine speed When, it can determine and the face of fluid torque converter speed of face of fluid torque converter torque is provided.In this way, when not providing transmission Fluid torque-converter transmission function is for providing the basis of desired face of fluid torque converter torque when being sensor.Even if providing The power train disconnect-type clutch application of force of desired engine start rotational torque be it is incorrect, also order DISG to can be with The face of fluid torque converter speed of desired face of fluid torque converter torque is provided.In addition, what is determined is divided by power train 2132 It may be added to from the amount of torque that formula clutch applies and the DISG torque life of desired DISG speed be provided in speed control mode It enables.In this way, it may be added to DISG from the torque that DISG passes to engine by the power train disconnect-type clutch to turn Square order, to reach desired face of fluid torque converter speed the DISG when power train disconnect-type clutch is applied And torque.Method 2100 proceeds to 2136 after adjusting DISG speed.

2136, method 2100 increases power train disconnect-type clutch pressure to be closed the power train disconnect-type clutch, Therefore engine can start rotation by DISG or power train.The power train disconnect-type clutch pressure is closed to provide The 2132 desired amount of torque determined start rotation engine.2136 after engine is in scheduled speed or position Power train spark and fuel can be provided.Method 2100 proceeds to after power train disconnect-type clutch pressure starts to increase 2138。

2138, method 2100 judges whether engine has been started up.In one example, when engine speed is more than threshold It may determine that engine has been started up when value speed.If method 2100 judges that engine has been started up, answer is "yes" simultaneously And method 2100 proceeds to 2140.Otherwise, answer is "No" and method 2100 returns to 2132.

2140, method 2100 judges whether engine speed has accelerated to and be equal to DISG speed.Work as engine Velocity sensor and DISG velocity sensor read as may determine that engine when essentially identical speed (for example, ± 20RPM) Speed is equal to DISG speed.If method 2100 judges that engine speed is equal to DISG speed, answer is "yes" and method 2100 proceed to 2144.Otherwise, answer is "No" and method 2100 proceeds to 2142.

2142, method 2100 is by engine speed modulation to DISG speed.By being adjusted with air throttle and fuel injection Motor torque can be by engine speed modulation to DISG speed.Furthermore, it is possible to by be closed completely power train separate type from Clutch adjusts engine speed and reaches DISG speed.But transmission is closed completely before engine speed match DISG speed It is that disconnect-type clutch can increase drive train torque interference.After by engine speed modulation to DISG speed, method 2100 return to 2140.

2144, method 2100 locks the power train disconnect-type clutch.By answering the power train disconnect-type clutch The power train disconnect-type clutch can be locked with the pressure for being greater than threshold quantity.After locking the power train disconnect-type clutch Method 2100, which proceeds to, to be exited.

In this way, when there is no drive train torque sensor and if power train disconnect-type clutch torque biographies The fluid torque-converter transmission function can be for estimating and providing desired face of fluid torque converter torque when delivery function is deteriorated Basis.On the other hand, if it is possible to obtain fluid torque-converter sensor, fluid torque-converter sensor output, which can be, to be used for DISG torque is adjusted so that desired fluid torque-converter can also be provided even if power train disconnect-type clutch transmission function variation The basis of impeller torque.

Limitation refers to Figure 22, and Figure 22 is shown for compensating power train disconnect-type clutch transmission function according to the method for Figure 21 Exemplary timing.The timing of Figure 22 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 22 indicates basic DISG torque-demand and the graph of relation of time.At one In example, basic DISG torque-demand is available to the power train without feedback or liquid from drive train torque sensor The DISG torque of the feedback of power torque-converters operating condition.Y-axis indicates basic DISG torque and basic DISG torque is asked along Y-axis The direction of arrow increases.X-axis indicates the time and the time increases to the right from the left side of figure.

The second figure from the top of Figure 20 indicates the graph of relation of face of fluid torque converter torque and time.Y-axis table Show face of fluid torque converter torque and face of fluid torque converter torque increases along the direction of Y-axis arrow.X-axis indicates the time simultaneously And the time increases to the right from the left side of figure.Solid-line trace 2201 indicates desired face of fluid torque converter torque.Dotted line trace 2204 indicate actual face of fluid torque converter torque.It is actual when can only see desired face of fluid torque converter torque Face of fluid torque converter torque is equal to desired face of fluid torque converter torque.

The graph of relation of third chart power train disconnect-type clutch power and time from the top of Figure 20.Y-axis table Show power train disconnect-type clutch power and power train disconnect-type clutch power increases along the direction of Y-axis arrow.Power train point It is closed under higher power from formula clutch and opens at a lower force.X-axis indicates time and time from the left side of figure Increase to the right side of figure.

The 4th figure from the top of Figure 20 indicates that DISG torque adjusts the graph of relation with the time.Y-axis indicates DISG It adjusts torque and DISG adjusts torque and increases along the direction of Y-axis arrow.X-axis indicate time and time from the left side of figure to The right side of figure increases.

The 5th figure from the top of Figure 20 indicates the graph of relation of engine speed and time.Y-axis indicates engine Speed and engine speed increase along the direction of Y-axis arrow.X-axis indicates the right side of time and time from the left lateral view of figure Side increases.

In time T₃₈, DISG torque is in higher level, and face of fluid torque converter torque is also.Power train separation Formula clutch is closed and because therefore actual face of fluid torque converter torque matches desired face of fluid torque converter torque There is no DISG torque adjusting.Engine acceleration is also at raised level, indicates that engine is being run.

In time T₃₉, basic DISG torque is reduced to zero；But the basic DISG torque can be in some instances Greater than zero to provide speed changer oil pressure.Engine stop and face of fluid torque converter speed is also reduced to zero.Power train separation Formula clutch is opened therefore engine and DISG are detached from.In time T₃₉With time T₄₀Between, engine and DISG holding stop Machine.

In time T₄₀, the driver requested torque (not shown) of basic DISG torque response and respond power train separation Formula clutch engagement force and increase, the power train disconnect-type clutch power can be transformed by the power train disconnect-type clutch transmit To the amount of the torque of engine.The driver requested torque of engine response is rotated and will be activated.Engine response driver It is required that torque by increase power train disconnect-type clutch application of force rotate, therefore the torque from DISG can transmit with Rotate engine.The DISG torque for passing to engine is estimated according to the power train disconnect-type clutch power.Specifically, it is transmitted It is the empirically determined transmission function output power train disconnect-type clutch torque of disconnect-type clutch power index.Order DISG torque is the sum of the torque of power train disconnect-type clutch and driver requested torque.In one example, driver wants The face of fluid torque converter torque that the torque asked is desirable to.If the torque of power train disconnect-type clutch by it is excessively high estimation or it is too low Estimation, actual face of fluid torque converter torque will change from desired face of fluid torque converter torque.

In this way, when power train disconnect-type clutch power increases, actual face of fluid torque converter torque is small In desired face of fluid torque converter torque.Therefore, the torque of power train disconnect-type clutch by underestimation and seldom Torque pass to face of fluid torque converter from DISG.As a result, DISG torque increases to correct the desired fluid torque-converter pump Take turns the difference between torque and actual face of fluid torque converter torque.DISG torque increasing is shown in DISG torque adjustment curve figure Add, which is added in basic DISG torque-demand shown in the first figure and exports to DISG.Moreover, In some instances, the DISG torque is responded to adjust to adjust the power train disconnect-type clutch transmission function of estimation.For example, such as Fruit DISG torque increases 2N-m, then the power train disconnect-type clutch transmission function is conditioned, to reflect the power train separate type Clutch transmits additional 2N-m with current power train disconnect-type clutch application of force.

Actual face of fluid torque converter torque can be determining by torque sensor or alternatively from fluid torque-converter Pump impeller speed, transformer turbine speed and the fluid torque-converter capacity factor described about Figure 21 and Figure 45-47 determine. Desired face of fluid torque converter torque can require to determine from accelerator pedal position or controller.

In time T₄₁, engine is activated and engine has accelerated to speed same as DISG.Moreover, power train Disconnect-type clutch is closed in response to the engine speed match DISG speed.It is responded in power train disconnect-type clutch actual Face of fluid torque converter torque is substantially equal to face of fluid torque converter torque desired by (± 10N-m) and DISG torque after being closed It adjusts and reduces.

Therefore it provides the method and system of Fig. 1-3 and Figure 21-22 is used for operation of hybrid vehicle power train, comprising: ring Engine start requirement is answered to open torque converter clutch；Power train is adjusted with desired face of fluid torque converter speed is responded Integrated actuating machine/generator (DISG) speed.In this way it is possible to provide the compensation of power train disconnect-type clutch.The party Method includes that adjusting DISG speed includes the function as transformer turbine speed and desired face of fluid torque converter speed Adjust DISG speed.This method includes desired face of fluid torque converter torque based on driver requested torque.This method packet DISG speed is included by adjusting DISG torque to adjust.

In some instances, this method further includes that the power train disconnect-type clutch torque of response estimation adjusts DISG turns Square.This method further includes that the power train disconnect-type clutch torque of the estimation is based on the power train disconnect-type clutch application of force. This method further includes running DISG when adjusting DISG speed with speed control mode.

The method and system for providing Fig. 1-3 and Figure 21-22 is used for operation of hybrid vehicle power train, comprising: response hair Motivation starting requires to open torque converter clutch；Power train integrated actuating machine/generator is run with speed control mode (DISG)；It responds desired face of fluid torque converter speed and adjusts DISG speed；It is opened by being closed power train disconnect-type clutch Dynamic engine.This method includes that response power train disconnect-type clutch application of force power train disconnect-type clutch is partly closed, And the torque of power train disconnect-type clutch is estimated according to power train disconnect-type clutch application of force.

In some instances, this method includes responding the power train disconnect-type clutch adjusting DISG torque of the estimation.It should Method further includes responding desired face of fluid torque converter torque to adjust DISG speed.This method includes DISG speed and closure should Power train disconnect-type clutch is adjusted simultaneously.This method further includes responding DISG during being closed the power train disconnect-type clutch It adjusts torque output and adjusts power train disconnect-type clutch transmission function.This method includes, by being closed the power train separate type Clutch starting engine includes partly being closed the power train disconnect-type clutch and being then closed completely the power train point From formula clutch, so that the power train disconnect-type clutch input speed matches when engine speed is substantially equal to DISG speed Power train separating rate.

The method and system of Fig. 1-3 and Figure 21-22 provides a kind of hybrid vehicle biography system, comprising: fluid torque-converter； Power train integrated actuating machine/generator (DISG)；Engine；Be arranged in power train separate type between the engine and DISG from Clutch；And the controller including executable non-transient instruction, for running the DISG with speed control mode and passing through It responds transformer turbine speed and desired face of fluid torque converter torque adjusts DISG speed and provides desired fluid power change Square device impeller torque.

In some instances, which includes additional executable non-transient instruction, For power train separation to be closed in the case where the first engine speed is substantially equal to DISG speed after the engine is stopped Formula clutch.It further includes additional executable non-transient instruction that the hybrid vehicle, which passes system, for responding starting hair The requirement of motivation is closed the power train disconnect-type clutch.It further includes additional executable non-that the hybrid vehicle, which passes system, The instruction of transition, for estimating the power train disconnect-type clutch torque according to power train disconnect-type clutch application of force.This is mixed Closing power car and passing system further includes DISG velocity sensor and the fluid torque-converter for estimating transformer turbine speed Turbo speed sensor.The hybrid vehicle passes system, which includes adjusting DISG torque to adjust DISG speed.

The method and system for providing Fig. 1-3 and Figure 21-22 is used for operation of hybrid vehicle power train, comprising: at least It is responded between desired drive train torque and actual drive train torque during being partly closed the power train disconnect-type clutch Difference adjust power train integrated actuating machine/generator (DISG) torque output.In this way, even if power train separates torque Estimation include error, desired torque can also be provided.This method includes the fluid power that the desired drive train torque is desirable to Converter pump torque and the actual drive train torque are actual face of fluid torque converter torques.

In some instances, this method includes the desired drive train torque based on driver requested torque.This method It further include adjusting the torque output of DISG based on the estimation of the open loop of power train disconnect-type clutch torque.This method further includes The open loop estimation of power train disconnect-type clutch torque is based on power train disconnect-type clutch utility command.This method is also wrapped It includes and starts rotation engine by being closed the power train disconnect-type clutch.This method further includes by the power train separate type The forward direction engine supply fuel and spark that clutch is closed completely start engine.

The method and system for providing Fig. 1-3 and Figure 21-22 is used for operation of hybrid vehicle power train, comprising: at least It is responded between desired drive train torque and actual drive train torque during being partly closed the power train disconnect-type clutch Difference adjust power train integrated actuating machine/generator (DISG) torque output；With according to the desired drive train torque and reality Difference between the drive train torque on border adjusts power train disconnect-type clutch transmission function.This method includes that the transmission function will pass Dynamic is the function that disconnect-type clutch torque is described as power train disconnect-type clutch application of force.

In some instances, this method further includes starting rotation by being at least partly closed power train disconnect-type clutch Engine.This method further includes before being closed completely power train disconnect-type clutch by supplying spark and fuel to engine And start engine.This method further includes that response engine speed after engine stop is substantially equal to DISG speed for the first time It is closed completely the power train disconnect-type clutch.The desired drive train torque is inputted based on accelerator pedal.This method is also wrapped Include the output of the actual drive train torque based on torque sensor.

The method and system of Fig. 1-3 and Figure 21-22 provides a kind of hybrid vehicle system, comprising: drive train torque passes Sensor；Power train integrated actuating machine/generator (DISG)；Engine；Power train point between the engine and DISG is set From formula clutch；And the controller including executable non-transient instruction, for applying the power train disconnect-type clutch The difference that period responds between desired drive train torque and the output of the drive train torque sensor adjusts DISG torque output.It should Hybrid vehicle system further includes additional executable non-transient instruction, for after the start of engine in engine speed Degree is substantially equal to be closed the power train disconnect-type clutch when DIS speed for the first time.

In some instances, which further includes additional executable non-transient instruction, is used for The requirement of response starting engine is closed the power train disconnect-type clutch.The hybrid vehicle system further include it is additional can The non-transient instruction executed, for responding between the desired drive train torque and the output of the drive train torque sensor Difference adjusts power train disconnect-type clutch transmission function.The hybrid vehicle system further includes that the drive train torque sensor is set It sets between face of fluid torque converter and DISG.The hybrid vehicle system further includes that drive train torque sensor setting exists Between transformer turbine and transmission gear group.

It is shown referring now to Figure 23, Figure 23 and restarts engine after stopping the burning in engine for improving The flow chart of method.The method of Figure 23 can store the non-transient of controller 12 in fig. 1-3 as executable instruction and deposit In reservoir.

2302, method 2300 determines operating condition.Operating condition can include but is not limited to engine speed, engine location, biography Dynamic is disconnect-type clutch state, DISG speed and environment temperature.Torque-demand can be from the accelerator pedal 130 of Fig. 1 and control Device 12 processed is inferred to.Method 2300 proceeds to 2304 after operating condition is determined.

2304, method 2300 is judged whether there is from the rotational automatic situation for stopping engine.In one example, when Desired drive train torque can stop engine rotation when being less than threshold value.In another example, when car speed is less than threshold Value speed and when motor torque be less than threshold torque when can stop engine rotation.If method 2300 judges to stop automatically Only the situation of engine rotation exists, and method 2300 proceeds to 2306.Otherwise, method 2300, which proceeds to, exits.

2306, method 2300 sequentially stops spraying fuel to engine cylinder, so that in fuel injection to specific Burning of the fuel in engine cylinder does not stop halfway during cylinder.Method 2300 proceeds to after stopping fuel injection 2308。

2308, method 2300 judges whether engine speed is lower than noise, vibration and discomfort (NVH) threshold value speed It spends and on lower NVH threshold velocity.If it is, answer is "yes" and method 2300 proceeds to 2310.Otherwise, it answers It is "No" and method 2300 back to 2330.

2310, method 2300 judges that whether engine crank angle is in scheduled position when engine rotates.One In a example, which is after the rotation of specific cylinder is by top dead centre compression stroke in predetermined crank angle number Interior crankshaft angles (for example, after cylinder top dead centre compression stroke for four-banger in 90 crank angle degrees). If method 2300 judges engine crank angle not in scheduled position, answer is "No" and method 2300 proceeds to 2308.Otherwise, answer is "yes" and method 2300 proceeds to 2312.

2312,2300 order starter of method engages starter pinion axis and pinion gear engages flywheel ring gear. Starter pinion axis can be moved by electromagnetic coil, and starter pinion can be opened when pinion shaft sufficiently stretches out Begin to rotate.In another example, starter pinion axis and pinion gear ring gear can be controlled individually, can individually drive It is dynamic.Method 2300 proceeds to 2314 after starter pinion axis and pinion gear are command by engagement engine.

2314, method 2300 judges whether pinion shaft and pinion gear are fully engaged engine flywheel.In an example In, it can determine that pinion shaft and pinion gear are engaged via sensor output (for example, limit switch) or starter electric current Engine.If method 2300 judges pinion shaft and pinion gear engagement engine, answer is "yes" and method 2300 proceed to 2316.Otherwise, answer is "No" and method 2300 proceeds to 2322.

2316, method 2300 arrives engine air throttle adjusting according to pinion shaft and pinion gear engagement engine flywheel The second position, may be changed mind for driver to stop engine and be ready.In one example, the second air throttle position It sets and is more opened than the first position 2322.If operator changes mind after starter engagement, by engine Throttle adjustment is to the position more opened.When pinion gear engages flywheel, motor torque may be impacted.Adjust hair Engine air amount can compensate the influence, and the pinion gear of engagement can make engine restarting and engine retard.It is adjusting Method 2300 proceeds to 2318 after engine air throttle.

2318, method 2300 judges to grasp after being command by from engagement starter pinion axis and starter pinion Whether author's alteration idea occurs.Operator, which changes mind, indicates that driver wishes to apply to wheel application torque to keep or increase Extra bus speed.In one example, operator changes mind can be sent out by loosening the brake or increasing via accelerator pedal Motivation torque command indicates.It is required if method 2300 judges that operator changes mind before engine rotates stopping, Then answer is "yes" and method 2300 proceeds to 2320.Otherwise, answer is "No" and method 2300 proceeds to 2308.

2320, since engagement engine flywheel, method 2300 pass through starter and start for pinion shaft and pinion gear It rotates engine and restarts engine.Fuel and spark are supplied to engine cylinder again also in order to engine vapour Burning in cylinder.Method 2300, which proceeds to, after engine start is rotated and restarted exits.

2322, according to pinion shaft and pinion gear, engagement engine flywheel does not adjust engine air throttle to method 2300 To first position.In one example, which is more closed than the second throttle position 2316. Engine throttle position is adjusted to reduce engine airflow to the position being more closed and reduce exhaust system Oxidation in catalyst.Method 2300 returns to 2308 after engine air throttle is adjusted to first position.

2330, method 2300 judges whether engine speed is lower than lower NVH threshold speed and whether engine speed is high In engaging speed threshold value.The engaging speed is may be along phase negative side lower than its engine when engine is being stopped To the engine speed of rotation.If engine speed is higher than engaging speed and is lower than lower NVH threshold speed, answer is "Yes" and method 2300 proceeds to 2332.Otherwise, answer is "No" and method 2300 proceeds to 2350.In engine speed Method 2300 also stops engaging the trial of starter when lower than engaging speed and being higher than zero engine speed.

2332,2300 order starter pinion axis of method and pinion gear engagement engine flywheel ring gear.Such as exist 2312 descriptions, the pinion shaft and pinion gear engagement engine flywheel ring gear can be ordered.In the small tooth of order starter Method 2300 proceeds to 2334 after wheel shaft and pinion gear engagement engine flywheel.

2334, method 2300 judge pinion shaft and pinion gear whether engagement engine flywheel ring gear.Such as exist 2312 descriptions, the method 2300 judge pinion shaft and pinion gear whether engagement engine flywheel ring gear.If side Method 2300 judges that flywheel is engaged by pinion shaft and pinion gear, then answer is "yes" and method 2300 proceeds to 2336.Otherwise, Answer is "No" and method 1523 proceeds to 2342.

2336, method 2300 adjusts throttle position to the 4th position.Since pinion shaft and pinion gear being engaged Occur desirably to adjust engine in the following manner it is possible that meeting in lower engine speed in engine flywheel Braking, i.e., it is via air throttle that engine air amount control is small by starter at higher engine speeds when attempting to being different from Gear shaft and pinion gear are joined to amount when engine flywheel ring gear.It is connect moreover, adjusting engine air amount and can compensate Close pinion gear.In one example, the 4th position is air throttle more than the first position 2322 and the second position 2316 The position of big degree closure.Moreover, the 4th throttle position is more opened than the third place 2342, change for operator Become and pays attention to being ready.It can also be provided in engine stop to engine location more according to engine speed modulation air throttle It is accurately controlled.Method 2300 proceeds to 2338 after air throttle is adjusted to the 4th position.

2338, method 2300 judges whether there is operator and changes mind.Operator can be determined as described in 2318 It changes mind.If there are operators to change mind for the judgement of method 2300, answer is "yes" and method 2300 proceeds to 2340.Otherwise, answer is "No" and method 2300 returns to 2310.

2340, in order to start, method 2300 starts rotation engine and provides spark and fuel to engine.Such as exist 2340 the methods 2300 can start rotation engine via starter or DISG.In response, operator changes mind engine Method 2300, which proceeds to, after starting rotation and restarting exits.

2342, method 2300 is by throttle adjustment to the third place.The third place can be than described in 2,336 The position that four positions are more closed.The third place is also possible to than described in 2,322 first and second described in 2316 The position that position is more closed.Method 2300 returns to 2310 after adjusting engine throttle position.

2350, if starter pinion axis and pinion gear be not in engagement state, side after engine has stopped 2300 order starter pinion axis of method and pinion gear engagement engine flywheel ring gear.It engages after the engine is stopped Starter pinion axis and pinion gear can reduce starter and/or ring gear abrasion.In starter pinion axis and pinion gear Method 2300 proceeds to 2352 after being command by engagement engine flywheel ring gear.

2352, after engine stop rotation, engine response operating condition resets automatically.Engine can respond Engine torque demand is restarted by operator or is responded operator and unclamps actuator restarting.When in no operator Hair is restarted in the case where the device (for example, initiation key switch) of the unique function of actuating or operation with starting engine When motivation, automatic engine starting occurs.Automatic engine starting can be started by operator or be run with more than one The device (such as can apply vehicle braking or can also act as when starting the brake pedal of the instruction of engine) of function starts. Method 2300, which passes through starter motor or restarts engine via DISG and proceed to, to be exited.

In this way, the method for Figure 23 can respond starter engagement and adjust the position of air throttle to improve motivation again Starting is to prevent operator from changing mind.Moreover, the method for Figure 23 is during engine is stopped according to engine speed Throttle position is adjusted, improves engine stop position will pass through limitation engine opposite direction rotation.

Referring now to Figure 24, Figure 24 show according to Figure 23 method improve engine restarting and engine stop it The exemplary timing of burning afterwards.The timing of Figure 24 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 24 indicates the graph of relation of engine speed and time.Y-axis indicates engine Speed and engine speed increase along the direction of Y-axis arrow.X-axis indicates the right side of time and time from the left lateral view of figure Side increases.Horizontal line 2402 indicates upper NVH engine speed threshold value.Horizontal line 2404 indicates lower NVH engine speed threshold value.Water Horizontal line 2406 indicates pinion gear engaging speed threshold value, wherein if engine speed is lower than horizontal line 2406, unless engine is Through stopping rotating, otherwise pinion gear is not engaged.

The second figure from the top of Figure 24 indicates the graph of relation of fuel-injection condition and time.Y-axis indicates fuel Spray regime.When fuel injection is operation to trace when higher horizontal.When trace when lower horizontal stop by fuel injection Only.X-axis indicates the time and the time increases to the right from the left side of figure.

Third figure from the top of Figure 24 indicates the graph of relation of engine throttle position and time.Y-axis indicates Engine throttle position and engine throttle position increase along the arrow direction of Y-axis.X-axis indicates time and time Increase from the right side of the left lateral view of figure.

The 4th figure from the top of Figure 24 indicates the graph of relation of starter pinion state and time.Y-axis indicates Starter pinion state and degree of engagement are described close to Y-axis.When trace is in RET level, pinion gear is returned.Work as mark Line pinion gear in horizontal ADV is advanced but is not engaged.When trace is in horizontal ENG, pinion gear is engaged with engine flywheel.X-axis It indicates the time and the time increases from the right side of the left lateral view of figure.

The 5th figure from the top of Figure 24 indicates the graph of relation of vehicle braking state and time.Y-axis indicates vehicle On-position and when trace be in it is higher level when using braking.When trace is in lower level, braking is released.X Axis indicates the time and the time increases from the right side of the left lateral view of figure.

In time T₄₂, engine speed increases, and fuel injection operation, air throttle partly opens, and starter does not engage, and And braking is not applied.These situations indicate that vehicle is being cruised with medium speed (for example, 40MPH).In time T₄₂With time T₄₃It Between, using vehicle braking so that vehicle slows down.Under the situation shown in, in time T₄₂With time T₄₃Between vehicle may move It moves or may stop.

In time T₄₃, response application vehicle braking and the throttle position based on driver requested torque reduce engine Burning stops.As a result, engine speed is reduced to or is less than upper NVH engine speed threshold value 2402.Starter pinion is ordered Engagement engine flywheel is enabled, but pinion gear is only advanced and incomplete engagement engine flywheel.Throttle position response hair Motivation speed is less than upper NVH engine speed threshold value and is greater than lower NVH threshold value and reduces.Moreover, response starter pinion to It is preceding but do not engage, adjust throttle position.Air throttle is opened to first position 2410.Engine speed continues to reduce and tightly exist Time T₄₃Pinion gear engages flywheel before.Pinion gear engagement flywheel is responded to adjust throttle position to the second position 2412.It should Second throttle position is more opened than first position.By after pinion gear engages opening throttle it is more, can be with It can change mind and prepare for driver, therefore engine restarting can be improved.

In time T₄₄, brake pedal unclamped by driver, this is construed to driver and changes mind to stop engine.Fuel Injection is reruned and starter by engaging pinion provides engine cranking torque.Engine restarting and in short-term Between after pinion gear return.In time T₄₄With time T₄₅Between, engine accelerates and subtracts during the driving condition of variation Speed.It will be to time T just₄₅Application braking again before.

In time T₄₅, stop engine in burning and engine reduce speed now.Its after a short while, engine speed Degree decreases below NVH engine speed threshold value 2402.Pinion gear response engine speed starts to be less than upper NVH engine speed It spends threshold value and is greater than lower NVH engine speed threshold value and advances, but the incomplete engagement engine flywheel of pinion gear.Response hair Motivation speed and pinion gear state engine air throttle are adjusted to first position 2410.Engine speed continues to reduce and work as Engine speed, which is less than lower NVH engine speed threshold value 2404 and is greater than 2406 subject throttle of engaging speed, is adjusted to third position Set 2414.The third place 2414 is opened less than first position 2410 and the second position 2412.Under engine speed is less than NVH engine speed threshold value 2404 and be greater than engaging speed 2406 when pinion gear engagement engine flywheel.Therefore, pinion gear is responded Position and engine speed air throttle are adjusted to the 4th position.Opened than the third place 2414 more in 4th position 2416. 4th position can provide additional air for engine, and the engine in the case where operator changes mind is compared It is easy restarting.In the case where no operator changes mind and remains engaged with pinion gear, engine speed reaches zero.

In time T₄₆, operator's release brake and engine are released engaging pinion weight by responding the braking New starting.Fuel injection requires to be reruned also responsive to release actuator and subsequent engine start.

In this way it is possible to adjust the position of engine air throttle to improve engine again when engine is stopped Starting.Engine speed and the position of pinion gear status adjustment engine air throttle are responded during engine stop to be helped In providing the air capacity that can improve the engine start for engine.In addition, if pinion gear is not before engine stop Engagement, the throttle position of adjusting can improve hair by predictably controlling engine air amount during engine stop Motivation stops.

The method and system for providing Fig. 1-3 and Figure 23-24 is used to stop the rotation of engine, comprising: stops empty to burning The fuel of the engine cylinder of gas and fuel supplies；The state that order starter is never engaged with engine is engaged to engine State engagement；With according to starter whether engagement engine adjust air throttle position.In this way, if operator Engine of changing mind can more be ready to start.This method includes that starter passes through pinion gear engagement engine.This method packet It includes throttle adjustment to first position in the first engine speed range when starter not engagement engine.This method packet It includes throttle adjustment to the second position, the second position in the first engine speed range when starter engagement engine It is more opened than first position.

In one example, this method further include in scheduled crankshaft angles window starter be command by engagement and start Machine.This method includes the crankshaft angles window in ± 40 crankshaft angles of the top dead centre of cylinder trip.This method is included in life Engine speed reduces during the starter engagement of order.

The method and system for providing Fig. 1-3 and Figure 23-24 is used to stop the rotation of engine, comprising: stops empty to burning The fuel of the engine cylinder of gas and fuel supplies；Order the starter engagement engine of not engagement engine；With according to starting Machine whether the position of engagement engine and engine speed modulation air throttle.This method is included in engine speed less than threshold value speed The position of air throttle is adjusted to the position being more closed when spending and is greater than threshold velocity for solar term in engine speed The position of door is adjusted to the position more opened.This method includes in the first engine speed range when starter does not connect By throttle adjustment to first position when conjunction engine.This method includes in the first engine speed range when starter engages By throttle adjustment to the second position when engine, which more opens than first position.This method is included in When starter not engagement engine by throttle adjustment to the third place in second engine speed range.This method is included in When starter engagement engine by throttle adjustment to the 4th position in second engine speed range, the 4th position is than the It more opens three positions.

The method and system of Fig. 1-3 and Figure 23-24 provides a kind of hybrid vehicle system, comprising: including air throttle Engine；Double mass flywheel (DMF) including being connected mechanically to the first side of the engine；It mechanically include being connected to this pair The power train disconnect-type clutch of first side of second side of mass flywheel；The starting of basic status including not engagement engine Machine；The speed changer of engine is selectively connected to by the power train disconnect-type clutch；And including executable non-wink Become instruction controller, with respond engine stop and before engine stop according to the starter whether engagement engine The position of air throttle is adjusted during engine stop.

In one example, which includes that engagement engine air throttle is not adjusted to first to response starter It sets.The Vehicular system includes that response starter engagement engine air throttle is adjusted to the second position, and the second position is than first It more opens position.The Vehicular system further includes additional instruction, to respond engine speed modulation throttle position.It should Vehicular system further includes additional instruction, in scheduled crank angle position engagement engine.The Vehicular system further includes this Scheduled crank angle position is ± 40 crankshaft angles of top dead centre from compression stroke cylinder.The Vehicular system further includes additional Instruction, to stop attempting to start engine when engine speed is lower than engaging speed and is higher than zero engine speed.

It shows referring now to Figure 25, Figure 25 for adjusting tail-off velocity contour and engine rotation stop position Method flow chart.The method of Figure 25 can store the non-transient of controller 12 in fig. 1-3 as executable instruction In memory.

2502, method 2500 judges engine stop rotation requires whether to have occurred and that.Engine stop rotation requires It can be provided with controller or operator.Controller can be automatically stopped engine without operator from have stop and/or Start the input that the dedicated actuator of unique function of engine provides.For example, when operator is breaking ignition switch from setting Automatic engine stop does not occur when open state.Alternatively, can occur when operator unclamps accelerator pedal automatic Engine stop.If method 2500 judges that engine stop is required, answer is "yes" and method 2500 proceeds to 2504.Otherwise, answer is "No" and method 2500 proceeds to and exits.

2504, method 2500 judges whether engine rotation is stopped in the case where the sliding of power train disconnect-type clutch Only.Method 2500 judges whether engine should stop in the sliding of power train disconnect-type clutch according to operating condition.Show at one In example, when it is desirable that engine can stop sliding without power train disconnect-type clutch when the very short time stopping engine It is dynamic.For example, may desire to stop engine quickly when engine speed is relatively low when requiring engine stop.Another party Face can stop sending out when engine speed is relatively high when requiring engine stop when power train disconnect-type clutch slides Motivation.It should also be mentioned that can stop starting in the case where open power train disconnect-type clutch during some situations Machine rotation.If method 2500 judges that engine rotation will be stopped in the case where power train disconnect-type clutch slides, Answer is "yes" and method 2500 proceeds to 2530.Otherwise, answer is "No" and method 2500 proceeds to 2506.

2530, method 2500 determines transmission clutch tubing pressure.In one example, it is desirable to speed changer clutch Device oil pressure can be based on the amount that vehicle will have been kept to stop at the clutch pressure on road when engine has stopped rotating.Cause This, if vehicle stops on slope, it would be desirable that transmission clutch tubing pressure can increase.In one example, it is desirable to Transmission clutch tubing pressure be empirically determined and be stored in and indexed by road grade and vehicle mass In table or function.Method 2500 proceeds to 2532 after desired transmission clutch tubing pressure is determined.

2532, method 2500 provides the speed of desired transmission clutch tubing pressure by rotary speed variator oil pump Degree rotation DISG.The DISG is connected to face of fluid torque converter, and the face of fluid torque converter is fluidly coupled to fluid power change Square device turbine.Transmission oil pump is driven by face of fluid torque converter, and transmission oil pump is provided to transmission clutch when rotating Oil pressure.In one example, it is desirable to transmission clutch tubing pressure index include empirically determined offer desired by The table of the value of the DISG speed of transmission clutch tubing pressure.The DISG speed is exported from the table and the DISG speed is controlled System is in the value exported from the table.Method 2500 proceeds to 2534 after DISG starts to rotate at the desired speed.

2534, method 2500 stops to the fuel stream and spark of engine cylinder.Fuel stream to cylinder passes through closing Fuel nozzle and stop.Moreover, fuel stream can stop in sequential order according to engine combustion order, so that working as engine Cylinder is without partly refuelling when rotation is command by stopping.The method after stopping to the fuel stream of engine cylinder and spark 2500 proceed to 2536.

2536, method 2500 makes the sliding of power train disconnect-type clutch to realize desired engine speed track.? In one example, empirically determined power train disconnect-type clutch is applied and sliding trace stores in memory and works as It is required that being applied to power train disconnect-type clutch when engine stop.The sliding trace table root when generating engine stop requirement According to engine speed with different rates to power train disconnect-type clutch applying pressure.Alternatively, empirically determined transmitting Function is according to desired power train disconnect-type clutch pressure output power train disconnect-type clutch application of force or pressure, the hope Power train disconnect-type clutch pressure be basis for running power train disconnect-type clutch.This other places, the sliding trace It may include when pressure is by timing when being provided to power train disconnect-type clutch.For example, most before engine stop The pressure can be applied to power train separate type in specific crankshaft angles after a fuel quantity is supplied to engine cylinder afterwards Clutch.Therefore, at the beginning of power train disconnect-type clutch pressure applies and pressure is applied to power train separate type clutch The rate storage of device is applied in memory and when issuing engine stop requirement.Start using power train separate type from Method 2500 proceeds to 2538 after clutch pressure-plotting.

2538,2500 order transmission clutch of method is by transmission output shaft connection/constraint (tie) in transmission case Body.Transmission output shaft can be by the same time simultaneously applied to the speed change other than power train disconnect-type clutch Device clutch and be connected to speed changer, such as U.S. Patent application No.12/833, disclosed in 788.By speed changer order to connect Method 2500 proceeds to 2540 after connecing state.

2540, method 2500 opens power train disconnect-type clutch.When engine speed is substantially equal to zero (for example, 100RPM or following) and engine when having stopped at desired position the power train disconnect-type clutch can open.It can Alternatively, when engine speed drops to predetermined value, the power train disconnect-type clutch can be opened.Therefore, it is passed by changing Dynamic is the operation of disconnect-type clutch, and method 2500, which can partly or entirely control engine speed track and drop to zero, starts Machine speed.Method 2500, which proceeds to, after power train disconnect-type clutch is opened exits.

2506, if power train disconnect-type clutch is not yet closed, method 2500 is closed the clutch of power train separate type Device.Duty cycle signals by increasing the power train disconnect-type clutch applying pressure can be closed the power train separate type Clutch.Method 2500 proceeds to 2508 after being closed the power train disconnect-type clutch.

2508, method 2500 stops to the fuel stream and spark of engine cylinder.As can stop shown in 2534 to The fuel stream and spark of engine cylinder.Method proceeds to 2510 after stopping to the fuel stream and spark of engine cylinder.

2510, method 2500 adjusts DISG speed and torque to start desired by the offer during stopping engine and rotating Machine velocity contour.In one example, one group of empirically determined engine speed track is stored in memory simultaneously And it is used as the basis for stopping engine.For example, if engine speed is greater than from the engine speed track of memory index Engine speed, then DISG torque, which absorbs, increases, and engine speed is directed to desired engine speed distribution map.If Engine speed is less than the engine speed from the engine speed track of memory index, then DISG torque increases, and will send out Motivation speed is directed to desired engine speed distribution map.Engine speed track table is when generating engine stop requirement Engine speed is shown with different rates according to engine speed.In addition, engine speed track may include when starting The timing that machine speed trajectory will be controlled by DISG.For example, being supplied to hair in last fuel quantity before engine stop After engine cylinder, specific crank shaft angle degree engine speed track can be controlled by DISG.Therefore, engine speed The original application time of distribution map and the storage of engine speed reduction speed are wanted in memory and when issuing engine stop It can be controlled by DISG when asking.After the application of power train disconnect-type clutch pressure-plotting starts, method 2500 is carried out To 2512.

2512, transmission output shaft is connected to case of transmission by 2500 order transmission clutch of method.Speed changer Output shaft can be by the same time simultaneously applied to the transmission clutch other than power train disconnect-type clutch And it is connected to speed changer, such as U.S. Patent application No.12/833, disclosed in 788, this application is fully incorporated in by reference This.Method 2500 proceeds to 2514 after by speed changer order to connection status.

2514, method 2500 opens power train disconnect-type clutch under scheduled engine speed.Stop in engine When only, which can be opened so that engine can coast be to zero velocity while DISG continues to revolve Turn and provides pressure to transmission clutch.In one example, which can start scheduled It is opened under machine speed, the engine speed which is started based on engine stop is (for example, give engine vapour The engine speed that the fuel stream of cylinder stops) and the rate that declines of engine speed.Moreover, the power train disconnect-type clutch can To open in specific crankshaft angles further to control engine stop position.Engine when being required by engine stop The table or function of speed fall off rate and engine speed index are exported in the case where power train disconnect-type clutch is opened Engine location.In one example, which corresponds to the hair improved a possibility that desired engine location stops Motivation position (for example, during scheduled crankshaft interval of the cylinder in compression stroke).Opening the clutch of power train separate type Method 2500 proceeds to 2516. after device

2516, method 2500 determines desired transmission clutch pipe pressure.The desired transmission clutch pipe pressure Power is determined as described in 2530.Method 2500 proceeds to 2518 after determining the desired transmission clutch pipe pressure.

2518, method 2500 rotates DISG to keep the desired transmission clutch tubing pressure.Can such as it exist 2532 described rotation DISG.Method 2500 carries out after order DISG supplies desired transmission clutch tubing pressure To exiting.It should be pointed out that DISG can periodically stop and restart to keep transmission clutch tubing pressure.If Transmission clutch tubing pressure has slow breakthrough rate, then DISG can be ordered to stop.Such as transmission clutch oil pipe pressure Power drops to threshold level, then DISG can be reused.

In this way, engine stop position can control for hybrid vehicle.By periodically from DISG Torque is provided to engine, the adjustable engine stop distribution map of power train disconnect-type clutch is from idling speed to zero-speed Degree, therefore engine stop is in desired position.

The exemplary timing of method stopping engine for according to fig. 25 is shown referring now to Figure 26, Figure 26.Figure 26's Timing can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 26 indicates the graph of relation of engine speed and time.Y-axis indicates engine Speed and engine speed increase along the direction of Y-axis arrow.X-axis indicates the right side of time and time from the left lateral view of figure Side increases.

The second figure from the top of Figure 26 indicates the graph of relation of DISG speed and time.Y-axis indicates DISG speed And DISG speed increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases to the right from the left side of figure.

Third figure from the top of Figure 26 indicates power train disconnect-type clutch application of force (for example, being closed the power train The power that disconnect-type clutch is applied) with the graph of relation of time.Y-axis indicate power train disconnect-type clutch application of force and Power train disconnect-type clutch application of force increases along the arrow direction of Y-axis.X-axis indicate time and time from the left side of figure to The right side of figure increases.

The 4th figure from the top of Figure 26 indicates the graph of relation of fuel supply state and time.Y-axis indicates fuel Supply state and when trace be in it is higher level when fuel supply engine, when trace be in it is lower level when fuel not Supply engine.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.

The 5th figure from the top of Figure 26 indicates the graph of relation of speed changer connection (tie-up) state and time.Y Axis indicates speed changer connection status and speed changer is connected when trace is in higher level.When trace is in lower water Usually speed changer is not connected.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.

In time T₄₇, engine speed is equal to DISG speed and in raised level.Engine is separated via power train It is connected to DISG to formula clutch mechanism.When the power train disconnect-type clutch input speed is equal to the power train separate type clutch When device output speed, which is closed completely.Moreover, when power train separating force is in higher level The power train disconnect-type clutch is closed completely.Fuel shown in when being in higher level such as fuel offer state, which is supplied to, to be started Machine.Since speed changer connection status is in lower level so speed changer is not connected to.

In time T₄₈, response operating condition (such as low engine torque demand and apply vehicle braking) engine is command by and is in Shutdown status.Fuel as fuel supply state is converted to shown in lower level to engine is stopped.In addition, response stops The requirement of engine adjusts DISG speed/torque to control engine speed and location track.In one example, engine speed Degree and location track are stored in memory and respond actual engine speed stored in memory and desired Difference between engine speed track adjusts DISG torque.For example, if specific time after requiring engine stop Actual engine speed is less than desired engine speed, then DISG torque increases uncommon to shift to actual engine speed The engine speed of prestige.In another example, if specific time after requiring engine stop, specifically start (such as No.1 cylinder top dead centre compression stroke) is set more than desired position in seat in the plane, then can increase the negative torque of DISG, with Biggish rate slows down engine.

In time T₄₉, response engine reaches predetermined speed power train disconnect-type clutch and is opened.And speed changer Clutch starts to be applied, therefore transmission output shaft is connected to case of transmission and vehicle chassis.By beating at a predetermined velocity Open power train disconnect-type clutch, it may be possible to preferably control engine speed during engine stop while allow DISG Operation.In this example, DISG is stopped, but in other examples, can continue rotation to provide motive power to run Transmission oil pump.Stop engine and DISG in the short time after opening disconnect-type clutch.

In this way, engine can stop so that can control engine location during stopping.Pass through control Engine stop position can improve engine restarting consistency of performance.

In time T₅₀, the response operator (not shown) DISG that loosens the brake is accelerated and provide to vehicle transmission system Torque.Moreover, DISG assists starting engine.Specifically, power train disconnect-type clutch is partly closed, from DISG to hair Motivation transmits torque.Fuel and spark are supplied to engine to support the burning in engine, such as provide state transformation by fuel To shown in higher level.Finally, transmission clutch is also opened to respond release brake and unclamps the speed changer.Response Power train disconnect-type clutch is fully closed when engine speed reaches DISG speed.

In this way, engine can be restarted when torque is supplied to vehicle transmission system with accelerating vehicle.Moreover, Power train disconnect-type clutch can be run in the method for reducing drive train torque interference.

In time T₅₀With time T₅₁Between, torque is supplied to vehicle transmission system according to driver requested engine and DISG. In this illustration, power train disconnect-type clutch remains closed；But it can be opened without stopping engine sometimes.

In time T₅₁, response operating condition (for example, low engine torque demand and apply vehicle braking) engine is commanded to Shutdown status.The fuel supply of engine is stopped, is converted to shown in lower level as fuel provides state.Pass through reduction Power train disconnect-type clutch application of force power train disconnect-type clutch is also command by sliding.In one example, power train point It is stored in memory from formula clutch slip rate as from the function for the time for requiring engine stop later.If engine Speed can be increased or decreased from desired velocity variations, the sliding ratio.For example, if spy after engine stop requirement It fixes time, engine speed is less than desired engine speed, and the sliding of power train disconnect-type clutch can be separated by increasing Formula clutch application of force and reduce.In this way, additional torque can be supplied to engine by DISG, so that engine is fast Degree matches desired engine speed.Order the DISG speed to the speed for making transmission oil pump be capable of providing desired oil pressure.

In time T₅₂, engine speed reaches scheduled speed and transmission clutch is by using to export speed changer Axis connection is in vehicle chassis.DISG continues rotation, and therefore oil pressure is supplied to transmission clutch.

In this way, power train disconnect-type clutch can slide desired by offer during engine stop process Engine stop position.In some instances, which is the top dead centre compression stroke in the cylinder Specific steam-cylinder piston stops at the position in scheduled degree before.

The method and system of Fig. 1-3 and Figure 25-26 provides engine stop method, comprising: response stops engine rotation Requirement power train integrated actuating machine/generator (DISG) speed is adjusted to providing desired transmission clutch oil pipe pressure The desired speed of power；And make the power train disconnect-type clutch sliding in power train between the DISG and engine with will Engine stop is in desired position.This method include the desired position be selected cylinder top dead centre compression stroke it Preceding scheduled crankshaft degree.This method further includes that the requirement of response stopping engine rotation stops to the fuel of engine cylinder Stream and spark.This method further includes responding stopping engine rotation transmission output shaft is connected to case of transmission.

In some instances, this method further includes opening power train disconnect-type clutch in basic zero engine speed.It should Method further includes continuing to rotate the DISG when engine is in zero velocity.This method further includes the starting when engine speed is zero With deactivate the DISG.

The method and system of Fig. 1-3 and Figure 25-26 provides engine stop method, comprising: response stops engine rotation Requirement be closed power train disconnect-type clutch；By power train integrated actuating machine/generator (DISG) speed adjust to towards The desired engine speed distribution map of zero engine speed reduction；Power train separate type is opened under scheduled engine speed Clutch.This method includes that transmission output shaft is connected to case of transmission by the requirement of response stopping engine.This method is also The requirement for stopping engine including response stops to the fuel stream and spark of engine cylinder.This method includes power train separate type Clutch is in the power train between engine and DISG.

In some instances, this method further includes the opening power train disconnect-type clutch under scheduled engine speed. This method includes increasing the speed of DISG when engine speed is less than desired engine speed distribution map.This method includes working as Engine speed reduces the speed of DISG when being greater than desired engine speed distribution map.

The method and system of Fig. 1-3 and Figure 25-26 provides a kind of hybrid vehicle system, comprising: engine；Including machine Tool it is connected to the double mass flywheel (DMF) of the first side of the engine；It mechanically include be connected to the double mass flywheel the The power train disconnect-type clutch of first side of two sides；First including being connected to second side of the power train disconnect-type clutch Power train integrated actuating machine/generator (DISG) of side；Via the power train disconnect-type clutch selective connection in engine Speed changer；And the controller of the executable instruction including being stored in the non-transient memory of pump impeller, hair is stopped with response The requirement of motivation rotation adjusts the operation of the power train disconnect-type clutch.

In some instances, Vehicular system includes at least partly being closed power train disconnect-type clutch.The Vehicular system Including being closed completely power train disconnect-type clutch.The Vehicular system includes additional instruction to beat under preset engine speed Open the power train disconnect-type clutch.The Vehicular system further includes to provide the speed of desired transmission clutch tubing pressure Run DISG.The Vehicular system further includes additional instruction selectively to deactivate DISG under zero engine speed.

It shows referring now to Figure 27, Figure 27 when engine is used for when the vehicle parking wherein run is in the gradient of variation Stop the method for the engine.The method of Figure 27 can store the non-wink of controller in fig. 1-3 as executable instruction In transition storage.

2702, method 2700 judges whether engine stops in the vehicle wherein run.In one example, work as vehicle Speed can determine that vehicle stops when being zero.If method 2700 judges that vehicle stops, answer is "yes" and method 2700 Proceed to 2704.Otherwise, answer is "No" and method 2700 proceeds to and exits.

2704, method 2700 judges whether to meet engine stop condition.Engine stop condition may include but not It is limited to driver requested torque to be less than threshold velocity less than threshold torque, engine speed and apply vehicle braking.Another It, can be using other engine stop conditions in a example.If engine stop condition occur, answer is "yes" and Method 2700 proceeds to 2706.Otherwise, answer is "No" and method 2700 proceeds to and exits.

2706, method 2700 estimates road grade and vehicle mass.Road grade can be by inclining in one example Oblique instrument determines.Vehicle mass can be determined as described in the 904 of Fig. 9.In addition, method 2700 stops engine rotation Turn.Method 2700 proceeds to 2708 after vehicle mass and road grade determine.

2708, method 2700 judges whether road grade is greater than first threshold road grade.In one example, this One threshold value or other threshold value road grades can be the function of vehicle mass.For example, if vehicle mass increases, first threshold Road grade can reduce.If method 2700 judges that the present road gradient is greater than first threshold road grade, answer is "Yes" and method 2700 proceeds to 2716.Otherwise, answer is "No" and method 2700 proceeds to 2710.

2710, method 2700 keeps speed changer oil pressure to allow transmission gear gear shift, and if speed changer is not In second gear, higher shelves (for example, second gear) is shifted to from lower shelves (such as first grade).It is higher by being shifted to Shelves, vehicle mass effectively increases on wheel, therefore move vehicle is more difficult.Speed changer oil pressure can be via electronic oil Pump is kept.Method 2700 proceeds to 2712 after shifting of transmission.

2712, method 2700 judges whether that vehicle is required to accelerate or increase torque-demand.In one example, increased It is driver requested to be determined from accelerator pedal position.If 2700 determination requirement vehicle of method accelerates or increased torque-demand, Then answer is "yes" and method 2700 proceeds to 2714.Otherwise, answer is "No" and method 2700 proceeds to 2710.

2714, method 2700 increase the torque for being supplied to power train and make transmission downshifts to reduced shelves (for example, First grade) with accelerating vehicle.Drive train torque can increase by DISG or after the engine is started by engine.Pass through By DISG or the starter with lower power output capacity starts rotation and can star engine.In shifting of transmission to One grade and proceeds to method 2700 after the torque increase of power train and exit.

2716, method 2700 judges whether road grade is greater than second threshold road grade.If method 2700 judges The present road gradient is greater than second threshold road grade, then answer is "yes" and method 2700 proceeds to 2724.Otherwise, it answers It is "No" and method 2700 proceeds to 2718.

2718, method 2700 keeps speed changer oil pressure to allow shifting of transmission and if speed changer is not already at Higher shelves are then shifted to the shelves (for example, third gear) higher than second gear.By being shifted to the shelves higher than second gear, vehicle matter Amount effectively increases on wheel, therefore move vehicle is more difficult.Speed changer oil pressure can be kept via electric oil pump.Becoming Method 2700 proceeds to 2718 after fast device downshift.

2720, method 2700 judges whether to require vehicle acceleration or increased torque-demand.In one example, increase Torque-demand from accelerator pedal position determine.If 2700 determination requirement vehicle of method accelerates or increased torque-demand, Then answer is "yes" and method 2700 proceeds to 2722.Otherwise, answer is "No" and method 2700 proceeds to 2718.

2722, method 2700 increases the torque for being supplied to power train and makes transmission downshifts to first grade to accelerate vehicle ?.Drive train torque can increase via DISG or after the engine is started via engine.Engine can by by DISG or starter with lower power output capacity start rotation starting.Biography is supplied to being shifted to first grade and working as Method 2700, which proceeds to, after the amount of torque increase of dynamic system exits.

2724, method 2700 applies vehicle braking, keeps speed changer oil pressure to allow shifting of transmission, and if become Fast device is not already at first grade and is then shifted to first grade.When vehicle stops in the gradient by being shifted to first grade and answering It can be ready to accelerate with braking.Moreover, by not applying braking in the lower gradient, it is possible to reduce brake wear subtracts simultaneously Few vehicle is mobile.Speed changer oil pressure can be kept via electric oil pump.Method 2700 proceeds to after application vehicle braking 2726。

2726, method 2700 judges whether to require vehicle acceleration or increased torque-demand.If method 2700 judges It is required that vehicle accelerates or increased torque-demand, then answer is "yes" and method 2700 proceeds to 2728.Otherwise, answer is "No" and method 2700 proceeds to 2724.

2728, method 2700 increases torque and the release brake for being supplied to power train, therefore vehicle can accelerate. Drive train torque can increase via DISG or after the engine is started via engine.Engine can by by DISG or Starter with lower power output capacity starts rotation starting.Method 2700 carries out after vehicle brake is released To exiting.

As described herein, such as when the stopping of upcoming vehicle or when the vehicle is stopped, Ke Yili With engine cutoff or out of service, to save fuel.During this operation, power train disconnect-type clutch can be opened. Therefore when the vehicle is still, it may be possible to which on upward trend, engine is normally closed to shut down.Therefore it is sent out in tail-off Another pressure source except motivation can be used to keep transmission pressure.In some instances, auxiliary electric pump can be used to Keep transmission pressure.In other examples, when vehicle stops, DISG speed does not drop to zero, and is held in low speed, leads to Often idling (for example, 200-500RPM) is significantly less than to keep transmission pressure.In these conditions, fluid torque-converter output turns Square is the value that zero (when output speed is zero) either is not enough to prevent vehicle from rolling backward after braking is released. A kind of approach application wheel braking is to prevent vehicle from rolling backward；But when effective, this also be can result in some cases Vehicle startup degradation, or require Slope Transducer.

Another problem is can to apply vehicle braking and regenerative system according to operating condition when operator's brake pedal Dynamic either or both of them.For example, (being with or without engine shutdown and power train separate type clutch during regenerative brake Device is opened) it can be balanced with friction pulley braking moment by the actuating torque that DISG is generated, correspond to brake-pedal load to provide Desired rate of deceleration.Since when vehicle will stop, regenerative brake torque is reduced to execute hillside fields and keep function, rub Therefore the major part required " deposit " for wiping braking moment reduces the benefit of regenerative brake.Therefore another hillside fields keeping method Be desirable to so as to enhance utilize regenerative brake ability.

In one example, the fluid torque-converter based on automatic transmission can be equipped with one-way clutch.In this way, If keeping transmission fluid pressure in stationary vehicle and if speed changer is maintained at gear (for example, opposite with neutral gear), Then one-way clutch is as mechanical hillside fields holding meanss device effect, when vehicle driving up to prevent vehicle from rolling backward.But According to vehicle mass and gradient angle, speed changer is maintained at lower shelves, for example, first grade, in the steeper gradient, example Such as 6%, when take-off the brake is merely able to slow down vehicle to be rolled backward.In this illustration, if speed changer is in first grade, as The amount of torque of the SIN function of gradient angle and vehicle matter can be enough to overcome one-way clutch holding torque.Therefore, at one In example, it is maintained at shelves higher than first grade if necessary to speed changer to prevent vehicle from rolling backward in the design maximum gradient, Speed changer may remain in the shelves higher than first grade.For example, upcoming stopping front derailleur can be shifted to it is higher Shelves so as to realize that hillside fields is kept, such as according to the gradient estimated during vehicle driving.

Greater than the scheduled gradient, such as 6%, the longitudinal sensor based on slope detection system may be used to determine the gradient.Cause This, in some instances, controller can determine whether current hill grade is more than the upper limit, if it does, braking system can be applied, Also prevent vehicle from rolling backward other than assisting hillside fields to remain operational.

Heavier vehicle or the vehicle that can have high load, such as light truck, in the transmission using multiple Clutch is advantageous, to increase maximum speed changer holding torque.It is two or more by being applied in stationary vehicle Clutch, speed changer input " can connect " in case of transmission.This method is also used as engine restarting vehicle A part of starting method, to form gear-box output torque when vehicle is started from stopping.Therefore, by when vehicle stops It keeps transmission pressure and application clutch (multiple clutches) is to keep gear or speed changer is made to be in connection status, when Operator's release brake is can to prevent vehicle from rolling backward.

The method according to Figure 27 is shown when engine is when the vehicle wherein run is parked on slope referring now to Figure 28, Figure 28 Stop the exemplary timing of engine.The timing of Figure 28 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 28 indicates the graph of relation of car speed and time.Y-axis indicates car speed And car speed increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases from the right side of the left lateral view of figure Add.

The second figure from the top of Figure 28 indicates the graph of relation of road grade and time.Y-axis indicates road grade And road grade increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases from the right side of the left lateral view of figure Add.Horizontal line 2802 indicates the first threshold gradient.The second threshold gradient of the expression first threshold gradient of horizontal line 2804.

Third figure from the top of Figure 28 indicates the graph of relation of transmission gear and time.Y-axis indicates speed changer Gear and corresponding transmission gear is identified along Y-axis.X-axis indicates the time and the time increases from the right side of the left lateral view of figure Add.

The 4th figure from the top of Figure 28 indicates the graph of relation of engine condition and time.Y-axis indicates engine State and the engine operation when engine condition trace is in higher level.When engine condition trace be in it is lower Engine stop when horizontal.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.

The 5th figure from the top of Figure 28 indicates the graph of relation of vehicle braking state and time.Y-axis indicates vehicle On-position and when vehicle braking state trace be in it is higher level when vehicle braking applied.When vehicle braking state mark Vehicle braking is not applied when line is in lower level.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.

The 6th figure from the top of Figure 28 indicates the graph of relation of vehicle brake pedal and time.Y-axis indicates vehicle Brake pedal status and when vehicle brake pedal state trace be in it is higher level when vehicle brake pedal applied.Work as vehicle Brake pedal is not applied when on-position trace is in lower level.X-axis indicate time and time from the left side of figure to The right side of figure increases.

In time T₅₃, car speed increases, and road grade is close to zero, and speed changer is in fifth speed, be vehicle with High-performance cruise.Engine runs and does not apply brake pedal and braking.

In time T₅₃With time T₅₄Between, vehicle accelerates and responds lower driver requested torque (not shown) First grade is reduced to from fifth speed.Vehicle braking is applied in application brake pedal.In time T₅₄The preceding very short time, in vehicle Road grade and engine stop requirement shifting of transmission are responded after stopping to second gear.

In time T₅₄, engine stop and speed changer is maintained at second gear to increase having for the vehicle appeared on wheel Imitate quality.It keeps applying vehicle brake pedal and braking；But in some instances after the vehicle has stopped, in shifting of transmission When brake pedal application, vehicle braking can unclamp after to higher shelves.Road grade keeps close to zero and is lower than first Gradient threshold value 2802.

In time T₅₅, driver loosens the brake.Vehicle braking of loosening the brake is responded to be released.Speed changer also drops Shelves, which respond driver's take-off the brake to first grade, improves vehicle acceleration.It is also responsive to response driver's take-off the brake restarting hair Motivation.Increase the rear vehicle that driver requested torque is loosened the brake in response and starts short time acceleration.

In time T₅₅With time T₅₆Between, vehicle accelerates and is then responding to driver requested torque and such as braking shape Brake pedal and braking deceleration are applied shown in state and brake pedal status.When vehicle accelerates and slows down, speed changer is also from first grade Shift is to fifth speed.Road grade, which also increases and is greater than first threshold road grade 2802, passes through time T₅₆.Driver utilizes Brake pedal and braking make vehicle deceleration

In time T₅₆, vehicle stops and transmission downshifts are to first grade, as shown in car speed and speed changer trace.When Engine continues to run when vehicle stops.

In time T₅7, the response vehicle gradient is greater than the first threshold gradient 2802 and stops the requirement of engine, speed changer liter Shelves arrive third gear.Speed changer shift increases effective mass of the vehicle on wheel, so that vehicle is more difficult to roll down the slope of increase Degree.Engine stop after the transmission up-shift very short time.Brake pedal and vehicle braking are still applied by driver, still It in some instances after the vehicle has stopped, can pine after after transmission up-shift to higher shelves when brake pedal application Open vehicle braking.

In time T₅₈, driver, which loosens the brake, to be released in response to brake pedal and is unclamped with brake.Speed changer from Third gear downshift is to first grade and engine start, as by shown in engine condition transformation.Braking and engine response system Dynamic pedal is released change state.The rear car that increased driver requested torque (not shown) is released is responded in brake pedal Beginning briefly accelerates.

In time T₅₈And T₅₉Between, vehicle accelerates and is then responding to driver requested torque and brake pedal and system Dynamic application and slow down, as shown in on-position and brake pedal status.When vehicle accelerates and slows down, speed changer is also from first Shelves speed change is to fifth speed.Road grade, which also increases and is greater than second threshold road grade 2804, passes through T₅₉Time.Brake pedal It is applied with braking by driver with decelerating vehicles.In time T₅₉Vehicle in front start to stop.

In time T₅₉, engine stop and to respond the brake pedal, low driver requested torque and road grade big Vehicle braking is applied in threshold value road grade 2804.Brake pedal trace and on-position trace are in higher level, indicate Using both braking and brake pedal.

In time T₆₀, driver loosen the brake and the brake pedal of the engine response release and start.Braking State is maintained at higher level, indicates application braking.Road grade is responded to be greater than second threshold road grade 2804 and drive The torque that member requires is less than threshold torque (not shown) and continues using braking.Vehicle is in stationary state, such as car speed trace It is shown in zero.

In time T₆₁, driver requested torque (not shown) increases and responds increased driver requested torque vehicle Braking is released.Vehicle starts to accelerate also responsive to increased driver requested torque, as shown in car speed increase.

In this way, vehicle and power train can respond the vehicle gradient of variation, so that when vehicle is sent out in the gradient Vehicle is kept substantially static when motivation stops.When vehicle stops in the increased gradient, the mobile reduction measure of vehicle gradually increases Add.

The method and system of Fig. 1-3 and Figure 27-28 provides the method that vehicle stops, comprising: responding when the vehicle is still The road gradient makes transmission up-shift；The engine of the vehicle is automatically stopped with response vehicle-state.This method includes working as road grade Gear number increases when increase.This method includes that be automatically stopped engine include that the low driver requested torque stopping of response is started Machine.This method include be automatically stopped engine further include response car speed stop engine.This method includes being automatically stopped Engine includes that response vehicle brake pedal state stops engine.This method is included in the case where no driver's shift requires Under make shift of transmission.This method further includes responding increased driver requested torque after transmission up-shift to make speed changer Downshift.

The method and system of Fig. 1-3 and Figure 27-28 also provides the method for vehicle stopping, comprising: during the first situation, when The first road grade is responded when stationary vehicle makes transmission up-shift to first gear ratio；During the second situation, work as stationary vehicle When respond the second road grade and make transmission up-shift to second gear ratio；Engine is automatically stopped with response vehicle-state.The party Method includes that first gear ratio is than second gear than low gear ratio, and the speed change when speed changer is not shifted to first gear ratio Device is not in first gear ratio.This method includes responding increased driving after transmission up-shift during the first and second situations The torque that member requires makes transmission downshifts.

In some instances, this method includes that the second road grade is greater than the first road grade.This method further includes becoming Speed changer oil pressure is kept when fast device shift.This method is included in engine stop before speed changer shift, and via power train Integrated actuating machine/generator keeps speed changer oil pressure.This method further includes response vehicle mass selection first gear ratio and second Gear ratio.

The method and system of Fig. 1-3 and Figure 27-28 provides a kind of power Vehicular system, comprising: engine；With the engine with The speed changer that the mode of the mechanical connection of selection connects；With the control for including the executable instruction being stored in non-transient memory Device makes speed changer shift for responding road grade when engine is in the stationary vehicle wherein run, which further includes Respond the instruction of road grade application vehicle braking.The Vehicular system includes wherein stopping engine before shifting of transmission, And speed changer oil pressure is wherein kept by the starter/generator that power train combines.The Vehicular system further includes additional finger It enables for responding vehicle mass selection first gear ratio and second gear ratio.

In some instances, which further includes additional instruction, increased for responding after stationary vehicle Driver requested torque makes transmission downshifts.The Vehicular system further includes additional instruction, for ringing after stationary vehicle Answer increased driver requested torque that speed changer is made to unclamp vehicle braking.The Vehicular system is automatic including the wherein speed changer Speed changer.

Referring now to Figure 29 A and 29B, Figure 29 A and 29B are shown for providing the method for vehicle braking via vehicle transmission system Flow chart.The method of Figure 29 A and 29B can store the non-transient of controller in fig. 1-3 as executable instruction and deposits In reservoir.

2902, method 2900 determines operating condition.Vehicle working condition can include but is not limited to engine speed, car speed, Brake pedal position, desired drive train torque, DISG speed and battery charge state.The method after determining operating condition 2900 proceed to 2904.

2904, method 2900 judges whether there is the situation for being automatically stopped engine.Engine can respond vehicle Situation and be not responding to the device with the unique function of starting and/or stop engine rotation (for example, on/off key Switch) input be automatically stopped.For example, engine does not stop automatically when operator stops key to engine rotary engine Only.But have the function of providing the accelerator pedal of drive train torque demand if operator unclamps, engine can respond Ground torque-demand is automatically stopped.If method 2900 judge be automatically stopped engine situation exist, answer is "yes" and Method 2900 proceeds to 2906.Otherwise, answer is "No" and method 2900 proceeds to and exits.

2906, method 2900 judges whether to require power train vehicle braking.It can require to be driven during vehicle deceleration It is vehicle braking to reduce the amount of the wheel braking for the vehicle that slows down.For example, can provide when vehicle descending via hair Motivation or the braking of the power train of DISG, so that small amount of wheel braking can be used for slowing down the vehicle.In one example, when Vehicle accelerates and there are methods 2900 when underneath drive system torque request may determine that power train braking is required.If method is sentenced Disconnected power train braking is required that then answering is "Yes" and method 2900 proceeds to 2910.Otherwise answering is "No" and method 2900 proceed to 2908.

2908, method 2900 provides desired torque to power train by DISG and/or engine.It is fired by engine Positive motor torque can be provided by burning air-fuel mixture and rotating the power train.DISG, which can be responded, flows to the DISG Electric current amount provide torque.Method 2900, which proceeds to, after providing desired torque to power train exits.

2910, the judgement of method 2900 does not have to the appearance whether engine DISG has the amount for providing desired vehicle braking Amount.In one example, method 2900 responds car speed, the speed changer shelves of selection, DISG torque absorptive capacity and judges not having to Whether engine braking DISG has the capacity for the amount for providing desired vehicle braking.Specifically, it describes empirically determined The table of the torque absorptive capacity of DISG DISG speed determined by the shelves from car speed and selection index.If method 2900 Judgement does not have to the capacity for the amount that engine DISG has for providing desired power train braking, then answer is "yes" and method 2900 proceed to 2916.Otherwise, answer is "No" and method 2900 proceeds to 2912.

2912, therefore method 2900 does not provide fuel rotation engine and the increase of engine spin loss to engine Power train braking can increase.It can be increased by adjusting valve timing engine spin loss.In one example, close to upper Stop induction stroke inlet valve is opened, and exhaust stroke (for example, 90 crank angle degrees after top dead centre compression stroke it Before) in exhaust valve open in advance, with increase engine spin loss and increase power train braking.Engine is connected in by being closed The power train disconnect-type clutch engine for connecing the holding part of the power train can rotate, as shown in Figs. 1-3.It is revolved in engine Turn and method 2900 proceeds to 2914. after engine spin loss increase

2914, vehicle energy is transformed into electric energy by method 2900.Specifically, DISG enters in generator mode, wherein Rotating energy from wheel is transformed into electric energy and is stored in battery or other energy accumulating devices.In an example In, turned from wheel by speed changer, by fluid torque-converter and to the rotating energy of DISG by what power train provided Become generation and passes through the electric energy of the electric current of starter.The electric energy can then store in energy accumulating device.Turn in vehicle energy Method 2900 returns to 2906 after becoming electric energy.

2916, method 2900 judges whether the SOC of energy accumulating device is greater than threshold value charge volume.In one example, SOC can be determined according to the upper voltage of energy accumulating device.If the SOC of 299 decision content storage device of method is greater than threshold value Amount, then answer is "yes" and method 2900 proceeds to 2930.Otherwise, answer is "No" and method 2900 proceeds to 2918.

In addition, may proceed to 2930 in 2916 methods 2900 when the braking of driver requested increased power train.For example, If driver is entered descending mode by lower button, method 2900 proceeds to 2930 to increase power train braking.

2918, DISG is converted to speed control mode from torque control model by method 2900.In speed control mode In, response DISG speed adjusts DISG output, so that DISG speed-shifting is at desired DISG speed.In one example, when When DISG speed is less than actual DISG speed, DISG torque increases.Equally when DISG speed is greater than actual DISG speed, DISG torque reduces.DISG is run with speed control mode so that DISG can become to caused driveline speed is changed by torque Change is made a response.As a result, can be turned in power train disconnect-type clutch transition period face of fluid torque converter with desired constant speed It is dynamic, therefore be more constant by the torque that fluid torque-converter transmits.In this way, DISG reduction may be separated by power train The interference of drive train torque caused by formula clutch is opened.After in DISG admission velocity control model, method 2900 proceeds to 2920。

2920, method 2900 is by opening or off the stopping engine rotation of power train disconnect-type clutch and stopping To the fuel stream of engine cylinder.Power train separate type clutch can be opened before the fuel stream into engine cylinder stops Device, so that the engine without burning does not reduce driveline speed and the torque in face of fluid torque converter.Quilt is rotated in engine Method 2900 proceeds to 2922 after stopping and power train disconnect-type clutch start to open.

2922, method 2900 adjusts the torque capacity of torque converter clutch (TCC), to eliminate power train separate type Clutch opens interference.Since the amount of torque for passing to power train from engine changes, when power train mode changes to energy When measuring generation mode, power train disconnect-type clutch is started to open, and instantaneous pump impeller speed can change.In an example In, the torque capacity of TCC is conditioned and is controlled, smooth to obtain between the change of power train disconnect-type clutch state Transformation.Therefore, more consistent car speed can be kept when power train disconnect-type clutch is opened.For example, if working as Face of fluid torque converter speed starts to reduce when power train disconnect-type clutch is opened, then adjustable TCC is to increase slippage. Method 2900 proceeds to 2924 after adjusting TCC.

2924, as described in 2914, vehicle energy is transformed into electric energy by method 2900.Electric energy is directed to electric energy conversion storage Cryopreservation device, electric energy is kept and time utilization afterwards.Device for converting electric energy can be battery or capacitor.In vehicle Kinetic energy is transformed into method 2900 after electric energy starts and proceeds to 2926.

2926, after being mitigated from the interference for opening power train disconnect-type clutch, method 2900 changes To torque control model.Method 2900 also adjusts DISG, and to provide negative torque, the amount of the negative torque is equal in deceleration fuel cutoff The amount that period engine provides.

The amount for the braking moment that engine can provide can be empirically determined and be stored in memory.Engine Braking amount may include the adjusting of valve timing, oil temperature, engine speed, throttle position and atmospheric pressure.The adjusting It can be added to characterized by specified valve timing, engine temperature, engine speed, throttle position and atmospheric pressure In basic engine braking torque.For example, engine braking torque can be 90 °C in oil temperature, engine speed is 1500RPM, basic valve timing, the air throttle of closure and 100kPA atmospheric pressure under determine.When to deviate this basic for operating condition Engine braking torque can be adjusted from basic braking moment when situation.

Current engine operating condition (for example, oil temperature, valve timing etc.) is determined and is rule of thumb true for indexing The basis of fixed table and/or function, the table and/or function export the engine braking torque under current working.Once working as After engine braking torque under preceding operating condition is determined, DISG torque is adjusted to engine braking torque.By by DISG Torque is adjusted to engine braking torque, when energy conversion device SOC is greater than threshold value, can be turned from braking is provided using DISG Torque conversion does not have to DISG and provides braking moment to via engine.

It can continue to monitor engine condition, so that DISG torque bear or regenerated can change with engine operating condition Amendment.For example, if oil temperature decline and engine friction increase, when the fuel stream to engine is stopped, imitate The negative DISG torque of engine braking torque can increase the variation to reflect engine braking torque.When engine rotation and When not having a fuel supply engine and when not burning in engine, engine braking is adjusted in negative DISG torque and is turned Method 2900 proceeds to 2928 after square.

2928, method 2900 activates and increases automatically the vehicle electric load of selection, can continue to provide to extend DISG The time quantum of power train braking.For example, if the time of one elongated segment of vehicle descent run, energy accumulating device can be fully Charging, therefore additional charging can not be received.During this situation, DISG, which can stop providing energy accumulating device, to be filled Electricity, to reduce a possibility that energy accumulating device is deteriorated.But if additional charge is supplied to Vehicular system, DISG energy Enough continue to provide charging to energy accumulating device so that energy accumulating device charging does not increase.

In one example, the electricity operation of selection is supplied to when energy accumulating device state of charge is greater than threshold level The electric current of Vehicular system increases.In other examples, when the charge for being supplied to battery by DISG is greater than threshold value charge rate, The electric current for being supplied to the Vehicular system of the electricity operation of selection increases.In some instances, when energy accumulating device state of charge is big When threshold level, engine rotation, DISG stopping is run with regeneration mode, and provides the vehicle system of the electricity operation of the selection The electric current of system continues, and until the charge of energy accumulating device is reduced to, second threshold is horizontal and then DISG returns to regeneration mould Formula.When the charge of energy accumulating device is less than threshold level, engine stop rotation.

The Vehicular system of the electricity operation of selection can activate automatically and connect or be supplied to more electric currents than requiring.Choosing The Vehicular system for the electricity operation selected can include but is not limited to front and back wind file defroster, exhaust aftertreatment heating device, electronic Pump and lamp.For example, front and back wind file frost removal can be activated without notifying driver, therefore driver may not realize that electric energy It is consumed to extend and DISG is run with regeneration.Moreover, the output of electrodynamic pump (for example, petrolift) can pass through increasing pump electricity Stream increases without notifying driver.Equally, emission System Heater and car light can be activated to extend and be transported with regeneration mode Row DISG.Method 2900 proceeds to 2906 after adjusting current capacity.

2930, if torque converter clutch (TCC) is locked, method 2900 increases the sliding on TCC.If TCC slip, the sliding on the TCC further increase.TCC slip can be reduced by connecting or separating power train separate type clutch Device is introduced into the torque interference of power train.In one example, it is in controlled sliding-modes and rings in 2934, TCC Face of fluid torque converter velocity variations are answered to adjust the TCC.Method 2900 proceeds to 2932 after adjusting the sliding on TCC.

2932, method 2900 makes in DISG admission velocity control model and is adjusted after leaving torque control model DISG speed is maintained at the speed (such as order DISG speed of ± 50RPM) being basically unchanged by DISG torque.Show at one In example, DISG speed is compared with desired DISG speed, and the difference for responding DISG speed and desired DISG speed adjusts confession To the electric current of DISG.If DISG speed is less than desired DISG speed, additional electric current is supplied to DISG to increase DISG and turn Square and speed.If DISG speed is greater than desired DISG speed, reduce be supplied to the electric current of DISG with reduce DISG speed and It is supplied to the torque of power train.It enables DISG admission velocity control model that DISG is enable to control drive train torque to drive without causing The undesirable driveline speed variation of member.Method 2900 proceeds to 2934 after making DISG admission velocity control model.

2934, TCC volume applications in steady state value or are converted to the new control of TCC closed loop sliding control by method 2900 Yield value.For example, adjusting the amount of torque that control TCC is transmitted through fluid torque-converter when face of fluid torque converter velocity variations Signal, with reduce power train interference.In one example, according to the TCC transmission function tune of output TCC control signal dutyfactor Save TCC slip amount.The TCC transmission function is indexed according to face of fluid torque converter speed and transformer turbine speed.It is adjusting Method 2900 proceeds to 2936 after TCC capacity.

2936, method 2900 judges whether there is the starter except DISG.In one example, if except DISG Starter cannot obtain or variation state, method 299 may determine that non-DISG starter is not present.If method 2900 Judge that the starter except DISG is not present, then answering is "No" and method 2900 proceeds to 2950.Otherwise, answer is "yes" And method 2900 proceeds to 2938.

2950, when DISG is in speed control mode, method 2900 be at least partly closed power train separate type from Clutch is to rotate engine.In one example, power train disconnect-type clutch is closed into the desired engine start of offer and turns The position of dynamic speed (for example, 250RPM).The desired engine start rotation speed can change according to operating condition and show some It is equally high that example neutralizes DISG speed.Closure power train disconnect-type clutch causes drive train torque to be delivered to generator.Therefore, The electric current that DISG is supplied to when the engagement of power train disconnect-type clutch is increased to keep DISG speed.With this side Formula, due to face of fluid torque converter constant airspeed, the torque transmitted on fluid torque-converter may remain in constant level.? After power train disconnect-type clutch is at least partly closed, method 2900 proceeds to 2952.

2952, method 2900 provides spark and fuel to engine cylinder.In one example, fuel is sprayed by fuel Mouth is supplied to generating cylinder.After providing spark and fuel to engine cylinder, method 2900 proceeds to 2954.

2954, method 2900 judges whether burn in engine cylinder.In one example, when engine turns Method 2900 judges in engine cylinder with the presence or absence of burning when square output increases.Engine speed increase can indicate engine Burning in cylinder.In one example, the burning in engine cylinder can be determined by cylinder pressure sensor.If side Method 2900 judges there is burning in engine cylinder, then answer is "yes" and method 2900 proceeds to 2956.Otherwise, it answers It is "No" and method 2900 proceeds to 2954.

2956, method 2900 opens power train disconnect-type clutch and adjusts DISG torque.It is generated more in engine Before speed of more torques engine to be accelerated to DISG when power train disconnect-type clutch does not engage, power train is opened Disconnect-type clutch can reduce the amount of the torque of the starting engine transmitted from DISG and power train.Open power train separate type Clutch also reduces power train and provides with the amount of torque of acceleration motor.Therefore, when power train disconnect-type clutch is released DISG torque can be reduced so that DISG is maintained at constant speed.It is adjustable in the example of vehicle energy rotation DISG By the amount of the DISG torque absorbed.Method 2900 carries out band 2940 after opening power train disconnect-type clutch.

2938, method 2900 passes through the starter except DISG and rotates engine.In one example, starter has The power output capacity and the starter lower than DISG is selectively engaged the flywheel for being connected to engine crankshaft.The starter The engine start velocity of rotation for being less than 250RPM is provided.Generator is supplied in 2938 sparks and fuel.Start in engine Method 2900 proceeds to 2940 after rotation.

2940, engine speed is accelerated to the speed synchronous with DISG by method 2900.Generator vapour is given by adjusting Fuel, spark and the cylinder air amount engine of cylinder are accelerated.After engine speed reaches DISG speed method 2900 into It goes to 2942.

2942, method 2900 by engine speed be maintained at DISG speed and engine crankshaft provide it is substantially zeroed Torque (for example, ± 10N-m).In other words, adjust motor torque just high enough to overcome engine lose and with DISG speed rotates engine.Method 2900 proceeds to 2944. after motor torque is substantially zeroed

2944, method 2900 is closed power train disconnect-type clutch.When power train disconnect-type clutch is closed It there is no torque transfer between power train and engine, therefore it provides not running between engine and operation engine Smooth transformation.When power train disconnect-type clutch is closed, engine is substantially with the speed of DISG (for example, ± 25RPM) Operation.Method 2900 proceeds to 2946 after being closed power train disconnect-type clutch.

2946, method 2900 gradually decreases engine combustion torque and then stops fuel injection, therefore engine It is not rotated under the power of their own.Engine output torque is gradually decreased by reducing cylinder air amount and cylinder fuel amount. Moreover, being increased by adjusting engine valve timing engine spin loss.For example, cylinder when close to top dead centre induction stroke Inlet valve can open, and can between top dead centre compression stroke and 45 crank angle degrees after top dead centre compression stroke To open the exhaust valve of cylinder to increase engine spin loss.The valve of other engine cylinders can in a similar way by It can be reduced by the negative torque that DISG is generated during operation regeneration so as to provide burning torque to during fuel shutoff from engine The changeover of engine offer braking moment.Furthermore, it is possible to adjust negative DISG machine torque to convert kinetic energy into electricity in DISG The face of fluid torque converter speed kept constant while energy.In this way, rotation engine, which can increase, is applied to transmission The load of system, to provide desired power train braking to vehicle.After engine combustion torque is gradually reduced method 2900 into It goes to 2948.

In one example, the amount for the regenerative torque that DISG is required should be with currently available engine braking torque amount Unanimously, as described in 2926.Engine braking torque can be according to oil temperature, engine friction and in current pump impeller speed Pumping under degree is estimated.Once actual engine braking can be with the hair of estimation after the system changes engine braking Motivation braking is compared and can be modified to estimation.In this way, when brake pedal is not operated, for hair Motivation braking and regenerative brake vehicle can slow down at the same rate.

2948, method 2900 keeps DISG torque to be basically unchanged and control TCC back to closed circuit sliding.Example Such as, adjustable TCC command signal is to provide the hope speed difference between face of fluid torque converter and transformer turbine.? TCC is proceeded to 2906 back to method 2900 after closed circuit sliding control.

In alternative example, engine rotation can start and make when engine spins up DISG speed Engine cannot get spark.The amount of power train disconnect-type clutch first closure very little, and in power train disconnect-type clutch On that there are higher slidings is horizontal.DISG can be converted to motor condition from Generator Status, to be transmission when acceleration motor System reduces any drive train torque interference when providing additional negative torque.Additional pressure is applied used in power train separate type clutch On device, to increase the negative torque for being supplied to power train by engine.DISG torque is adjusted in speed control state at DISG To provide desired power train brake level.In one example, DISG electric current is adjusted to provide additional desired vehicle deceleration Rate.

In another example, 2936-2956 can be replaced with following steps, i.e., absorb in DISG torque (for example, will rotation Turn energy conversion into electric energy) reduce when, when no driver input in the case where pass through friction catch (for example, wheel braking) Vehicle braking increase when engine be maintained at zero speed.Friction brake force can increasing proportional to the braking of DISG power train is reduced Add.Therefore, when the power train braking provided by DISG is reduced, vehicle braking is applied automatically.

In this way, the method for Figure 29 A-B provides power train braking, therefore can be saved by converting kinetic energy into electric energy Fuel saving.Moreover, this method can reduce drive train torque interference by control DISG, TCC and other power train parts.

It is shown referring now to Figure 30, Figure 30 and provides the exemplary of vehicle braking by power train according to the method for Figure 29 A-B Timing.The timing of Figure 30 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 30 indicates the graph of relation of transformer turbine speed and time.Y-axis table Show transformer turbine speed and transformer turbine speed increases along the direction of Y-axis arrow.X-axis indicates the time simultaneously And the time increases along the direction of X-axis arrow.

The second figure from the top of Figure 30 indicates the graph of relation of engine speed and time.Y-axis indicates engine Speed and engine speed increase along the direction of Y-axis arrow.X-axis indicates the right side of time and time from the left lateral view of figure Side increases.

Third figure from the top of Figure 30 indicates the relation curve of torque converter clutch (TCC) application of force and time Figure.Y-axis indicates TCC application of force and TCC application of force increases along the direction of Y-axis arrow.X-axis indicates time and time from figure Left lateral view right side increase.

The 4th figure from the top of Figure 30 indicates the graph of relation of the torque of power train disconnect-type clutch and time.Y Axis indicates the torque of power train disconnect-type clutch and the torque of power train disconnect-type clutch increases along the direction of Y-axis arrow.X Axis indicates the time and the time increases from the right side of the left lateral view of figure.

The 5th figure from the top of Figure 30 indicates the graph of relation of DISG output torque and time.Y-axis indicates DISG Output torque and DISG output torque increase along the direction of Y-axis arrow.X-axis indicate time and time from the left side of figure to The right side of figure increases.

The 6th figure from the top of Figure 30 indicates the graph of relation of motor torque and time.Y-axis indicates engine Torque and motor torque increase along the direction of Y-axis arrow.X-axis indicates the right side of time and time from the left lateral view of figure Side increases.

In time T₆₂, engine stop, turbine trip speed increases, and DISG provides negative (for example, braking) torque to transmission System.TCC clutch is locked and power train disconnect-type clutch is opened and do not transmit torque.

In time T₆₃, the requirement of response restarting engine, torque converter clutch sliding increase.Restarting hair Increase of the requirement of motivation based on driver requested torque (not shown).The TCC when torque converter clutch, which is slided, to be increased Power reduces.Engine speed remains unchanged, and power train disconnect-type clutch stays open, and DISG charges a battery and mentions For negative drive train torque.

In time T₆₃With time T₆₄Between, it responds driver requested torque and is converted to DISG from torque control model Speed control mode.Then, DISG is adjusted to desired speed.Adjust TCC also to provide constant slippage.

In time T₆₄, power train disconnect-type clutch is at least partly closed to start engine.DISG torque turns from negative Square increases towards zero-turn square, and subsequently becomes positive torque, starts engine to provide torque.The amount of DISG torque according to Increase to start the amount of the torque of rotation engine.The engine speed when engine rotates spark and fuel is supplied to engine Increase.

In time T₆₄With time T₆₅Between, engine output torque increases and the torque acceleration motor that burns.DISG becomes It returns to braking mode and responds the opening of the burning power train disconnect-type clutch in engine.Open the clutch of power train separate type Device enables the engine to accelerate to DISG speed without influencing drive train torque.

In time T₆₅, respond engine speed and reach DISG speed transmission system's disconnect-type clutch closure.In engine speed Closure power train disconnect-type clutch can reduce drive train torque interference after degree reaches DISG speed.By reducing air throttle Opening is also reduced by the torque of adjustment cylinder valve timing engine.

In time T₆₆, engine transitions to deceleration fuel cutoff mode, in mode engine rotation without giving fuel simultaneously And the air-fuel mixture that do not burn.When engine rotation is without giving fuel, it provides braking moment.By with air throttle or Cylinder valve adjusts the adjustable engine braking torque of intake manifold pressure.DISG is also converted to torque control model.

Therefore, the method and system of Fig. 1-3 and Figure 29-30 provides control power train braking, comprising: stops in engine rotation Power train braking is provided via motor when only；It is more than threshold value starting engine rotation with response battery charge state.With this Kind mode, when energy accumulating device charging is greater than threshold value (for example, fully charged), engine braking can take over (take Over it) is braked for DISG.This method further include be automatically stopped engine and open in engine stop in engine and Power train disconnect-type clutch between motor, and further include providing engine to wheel in the rear of starting engine rotation Braking moment, and power train disconnect-type clutch is at least partly closed to rotate engine.

In one example, this method further includes being transported while vehicle energy is transformed into electric energy with speed control mode Row motor.This method further includes increasing during starting engine rotation when engine speed is less than engine idle rotational The sliding of torque converter clutch.This method further includes that engine is rotated via combination starter/engine power train.It should Method further includes that power train disconnect-type clutch is engaged to for engine to be connected to starter/engine in conjunction with power train. This method further includes with speed control mode service meter and adjusting motor torque so that driveline speed is maintained at base This constant torque.

The method and system of Fig. 1-3 and Figure 29-30 also provides control power train braking, comprising: rotates and stops in engine When via the first motor provide power train braking；Responding battery charge state is more than threshold value starting engine rotation, wherein Engine rotation is carried out via the second motor.This method further include order engine rotation before the second motor be not connected to In engine.This method further include engine rotate stop when the first motor be not connected mechanically to engine.

In one example, it is disconnected to be included in the second motor and engine when engine speed reaches threshold velocity for this method It opens.This method further includes the closure power train disconnect-type clutch when engine speed is substantially equal to the first electromotor velocity.It should Method further includes increasing torque converter clutch sliding during being closed power train disconnect-type clutch.This method further includes The power output capacity of two motor is lower than the power output capacity of the first motor.

The method and system of Fig. 1-3 and Figure 29-30 also provides a kind of Vehicular system, comprising: engine；Including mechanically connecting It is connected to the double mass flywheel (DMF) of the first side of the engine；It mechanically include the second side for being connected to the double mass flywheel The power train disconnect-type clutch of first side；Biography including being connected to first side of second side of the power train disconnect-type clutch Assembly is moved at starter/generator (DISG)；Starter except the DISG does not engage the basic of the engine including starter State；The speed changer of engine is selectively connected to by the power train disconnect-type clutch；And controller, the controller Including executable non-transient instruction, power train is provided to be automatically stopped engine, when engine rotates stopping through DISG Braking passes through the starting except DISG when DISG provides power train braking and when the state of charge of battery is greater than threshold value The engine that machine rotation stops.

In some instances, which further includes additional instruction, to work as power train disconnect-type clutch at least portion When dividing ground closure, increase the sliding of torque converter clutch.The Vehicular system further includes being closed to pass after the start of engine Dynamic is disconnect-type clutch.The Vehicular system further includes that there is DISG the power output for the starter being greater than except the DISG to hold Amount.The Vehicular system further includes torque converter clutch and additional instruction in the closure power train disconnect-type clutch phase Between increase torque converter clutch sliding.The Vehicular system further include when provide power train braking when DISG provide to energy The charge of storage device.

The method and system of Fig. 1-3 and Figure 29-30 also provides control power train braking, comprising: rotates and stops in engine When via motor provide power train braking；The torque of the motor is adjusted with the situation of response engine.This method includes should The situation of engine is oil temperature.This method includes that the situation of the engine is the valve timing of engine.This method includes The situation of the engine is engine coolant temperature.This method includes the engine braking turn that the situation of the engine is estimation Square.This method further includes by providing power train braking with regeneration mode service meter.This method includes working as engine condition The torque variation of motor when variation.

The method and system of Fig. 1-3 and Figure 29-30 also provides control power train braking, comprising: rotates and stops in engine When via motor provide power train braking；With the torque for adjusting the motor according to engine braking torque.This method includes According to engine motor oil Temperature estimate engine braking torque.This method includes according to the velocity estimation of the motor engine Braking moment.This method includes that the torque of the motor is negative torque.This method includes that the motor is in generator mode.It should Method includes that the braking moment of the engine is deceleration fuel cutoff braking moment.This method includes the cause of the engine engine Position of the dynamic torque based on air throttle.

The method and system of Fig. 1-3 and Figure 29-30 also provides a kind of Vehicular system, comprising: engine；Including mechanically connecting It is connected to the double mass flywheel (DMF) of the first side of the engine；It mechanically include the second side for being connected to the double mass flywheel The power train disconnect-type clutch of first side；Biography including being connected to first side of second side of the power train disconnect-type clutch Assembly is moved at starter/generator (DISG)；Except the DISG includes the basic status that starter does not engage the engine Starter；The speed changer of engine is selectively connected to by the power train disconnect-type clutch；And controller, the control Device includes executable non-transient instruction, provides transmission to be automatically stopped engine, when engine rotates stopping through DISG System's braking is adjusted the torque of DISG to engine braking torque when providing power train braking.

In some instances, which further includes additional instruction with the speed of acceleration motor to DISG.The vehicle System further includes that additional instruction to respond reduces negative turn provided by DISG by the negative torque that engine is supplied to power train Square.The Vehicular system further includes additional instruction for starting engine by the starter except the DISG.The Vehicular system It further include additional instruction for stopping the burning in engine cylinder after the engine is started.The Vehicular system further includes attached The instruction added is for adjusting engine braking after stopping the burning in engine cylinder.

The method and system of Fig. 1-3 and Figure 29-30 also provides control power train braking, comprising: rotates and stops in engine When via motor provide power train braking；A kind of dress is activated by motor automatically with when motor provides power train braking It sets to consume the charge provided via motor.This method includes that the state of charge of response electrical storage device swashs more than threshold level It serves somebody right device.

In one example, it is heating device that this method, which includes the device,.This method includes that the heating device is that vehicle window removes White device.This method includes that the heating device is tapping equipment heater.This method includes that the device is pump.This method includes the pump It is fuel-injection pump.

The method and system of Fig. 1-3 and Figure 29-30 also provides control power train braking, comprising: rotates and stops in engine When via motor provide power train braking；Increase the electricity for being supplied to a kind of device when power train braking with providing in motor Stream.This method includes the electric current according to the charge velocity increase by the motor output.This method is included in motor and provides biography The motor provides charging for energy accumulating device when dynamic system's braking.This method includes electricity of the electric current according to energy accumulating device Lotus state increases.This method includes that the device is pump.This method includes that the device is heater.This method includes that the device is Lamp.

The method and system of Fig. 1-3 and Figure 29-30 also provides control power train braking, comprising: rotates and stops in engine When via motor provide power train braking；Activate a kind of device to consume warp automatically when the motor provides power train braking The charge provided by the motor；The state of charge for responding energy accumulating device rotates engine；And in energy accumulating device State of charge stop operating engine when being less than threshold level.

In one example, this method include consume the charge provided by the motor the device be cannot with driver The device of operating status seen or cannot heard.This method include consume by motor provide charge the device be heating Device.This method includes that the heater provides heat to surrounding air.This method includes that the heater provides heat to exhaust system.The party Method further includes stopping providing power train braking via motor when engine rotation.

The method and system of Fig. 1-3 and Figure 29-30 also provides control power train braking, comprising: rotates and stops in engine When via motor provide power train braking；Response is transported via the requirement that engine provides power train braking with speed control mode The row motor；Start engine；Engine is accelerated to the speed of the motor；And response engine speed is substantially equal to The power train disconnect-type clutch that electromotor velocity closure is opened.This method includes via the starter starting except the motor Engine.

In some instances, this method includes that the requirement of power train braking is provided by engine based on energy accumulating device State of charge.This method includes providing the charge shape that the requirement that power train is braked is in response to energy accumulating device by engine State is greater than the threshold quantity of charge.This method includes that response closure power train disconnect-type clutch adjusts torque converter clutch Sliding.This method includes that the sliding of the torque converter clutch increases.This method includes that motor provides torque to start hair Motivation.

The method and system of Fig. 1-3 and Figure 29-30 also provides control power train braking, comprising: rotates and stops in engine When via motor provide power train braking；Start simultaneously rotary engine；To engine spray fuel；Engine is accelerated to this The speed of motor；And stop to engine spray fuel, and pass through when motor output is less than the threshold quantity of electric current Engine provides power train braking.This method further includes that response engine speed is substantially equal to electromotor velocity closure power train point From formula clutch.

In one example, this method further includes being transported during being closed power train disconnect-type clutch with speed control mode The row motor.This method further includes increasing the cunning of torque converter clutch during being closed power train disconnect-type clutch It is dynamic.This method further include in response to energy accumulating device state of charge be more than threshold value charge and start engine.This method is also wrapped It includes and increases in response to engine braking torque after stopping to engine spray fuel and reduce motor torque.This method includes Start engine via the starter except the motor.

The method and system of Fig. 1-3 and Figure 29-30 also provides a kind of Vehicular system, comprising: engine；Including mechanically connecting It is connected to the double mass flywheel (DMF) of the first side of the engine；It mechanically include the second side for being connected to the double mass flywheel The power train disconnect-type clutch of first side；Biography including being connected to first side of second side of the power train disconnect-type clutch Assembly is moved at starter/generator (DISG)；Except the DISG includes the basic status that starter does not engage the engine Starter；The speed changer of engine is selectively connected to by the power train disconnect-type clutch；And controller, the control Device includes executable non-transient instruction, provides transmission to be automatically stopped engine, when engine rotates stopping through DISG System braking, response energy accumulating device state of charge starting engine, engine rotation when stop engine in burning, And power train braking is provided by engine.In this way, which can brake electric powertrain and be converted to machinery Power train braking.

In some instances, which further includes additional instruction, and engine is accelerated to the speed of DISG.It should Vehicular system further includes additional instruction, be closed when engine speed is substantially equal to the speed of DISG the power train separate type from Clutch.The Vehicular system further includes additional instruction, for starting engine via the starter except the DISG.The vehicle system System further includes additional instruction, for stopping the burning in engine cylinder after the engine is started.The Vehicular system also wraps Additional instruction is included, for adjusting engine braking after stopping the burning in engine cylinder.

It shows during the vehicle braking provided via vehicle transmission system referring now to Figure 31, Figure 31 for controlling power train The flow chart of the method in gap (lash).The method of Figure 31 can store in the system of Fig. 1-3 as executable instruction In non-transient memory.

3102, method 3100 judges whether engine shuts down and whether DISG is in regeneration mode (for example, DISG will The kinetic energy of vehicle is transformed into electric energy).In one example, it may determine that engine stop is rotated when engine speed is zero. It can determine that DISG is in regeneration mode when electric current is flowed out from DISG and DISG provides negative torque for power train.If method 3100 judge that engine does not rotate and DISG is in regeneration mode, then answer is "yes" and method 3100 proceeds to 3104. Otherwise method 3100, which proceeds to, exits.

3104, speed changer is transformed to the shelves for allowing DISG speed to stay below basic DISG speed by method 3100 Position.The basic DISG speed can provide the speed of specified torque (for example, maximum DISG torque) lower than the DISG.If DISG speed is greater than basic DISG speed, then DISG torque is inversely proportional with DISG speed.Therefore, if DISG speed is greater than base This DISG speed, speed changer can upshift, so that DISG speed is less than DISG base speed.If car speed makes DISG Speed cannot be by making transmission up-shift decrease below the speed of DISG base speed, then speed changer can be moved to permission Gear of the DISG to be rotated closest to the speed of DISG base speed.In addition, in some instances, can turn in 3104, DISG Speed control mode is changed to, rather than waits the increase of driver requested torque.It is shifted gears in speed changer so that DISG connects Closely or it is less than after DISG base speed, method 3100 proceeds to 3106.

3106, method 3100 judges whether to require to increase the torque of positive drive system.The requirement for increasing the torque of positive drive system can To respond increased driver requested torque.Driver requested torque can be determined from accelerator pedal or controller.Such as There is the requirement (for example, accelerating vehicle) for increasing the torque of positive drive system in the judgement of fruit method 3100, then answer is "yes" and method 3100 proceed to 3108.Otherwise method 3100 proceeds to 3104.

3108, method 3100 adjusts torque converter clutch (TCC) capacity.In one example, TCC capacity is adjusted It saves desired fluid torque-converter output torque and subtracts in the case where fully opening TCC the fluid torque-converter for the torque of generation Amount.In the case where fully opening TCC the fluid torque-converter by the amount of torque of generation can from face of fluid torque converter speed and Transformer turbine speed determines.Specifically, face of fluid torque converter speed and the index storage of transformer turbine speed Function or table in memory, the function or table are exported according to face of fluid torque converter speed and transformer turbine speed Fluid torque-converter torque output.Once it is exported to the TCC after TCC capacity is determined.After TCC capacity is determined, Method 3100 proceeds to 3110.

Speed control mode is converted to from torque control model in 3110, DISG.In speed control mode, DISG is adjusted Torque is to provide desired DISG speed.The desired DISG speed can be that constant or it can be as vehicle working condition becomes Change.Method 3100 proceeds to 3112. after DISG is converted to speed control mode

3112, method 3100 adjusts DISG speed, to adjust fluid torque-converter output torque.Specifically, pass through adjusting DISG speed adjusts fluid torque-converter torque to positive torque from negative torque.In one example, it is desirable to fluid torque-converter it is defeated The storage of distribution of torque figure accelerates to power train in memory and braking (for example, negative drive train torque) from power train out (for example, the torque of positive drive system) is indexed during changing.The desired fluid torque-converter output torque distribution map is according to driver It is required that variation torque and current variator shelves provide fluid torque-converter output torque.The desired fluid torque-converter output turns Square and turbine trip speed are input to the function or table of output face of fluid torque converter speed.The table or function state fluid torque-converter Transmission function.DISG is commanded to face of fluid torque converter speed, so that the desired fluid torque-converter of fluid torque-converter output is defeated Torque out.After DISG completes desired fluid torque-converter output distribution map, the DISG torque is adjusted to provide desired drive The torque that the person of sailing requires.In this way, DISG speed is controlled so as to transformer turbine speed and desired hydraulic moment changeable The function of device output.That is, actual fluid torque-converter output torque is controlled so as to face of fluid torque converter speed and whirlpool The function of wheel speed.

In alternative example, by changing face of fluid torque converter speed relative to transformer turbine speed, DISG speed adjusts fluid torque-converter output torque.Specifically, by increasing DISG speed, DISG increases fluid torque-converter output Torque, from negative torque to positive torque.Fluid torque-converter output torque is quicklyd increase to reduce between speed changer and Transmission gears Gap.When the gap between gear set reduces, fluid torque-converter output torque reduces, therefore gear teeth rushes gear teeth Hitting can reduce.

For example, carrying out adjusting tooth by adjusting fluid torque-converter output torque to gear teeth speed according to the gear teeth of estimation It takes turns gap and passes through gear teeth to gear teeth speed.In one example, gear teeth speed is fluid torque-converter to gear teeth speed Turbine trip speed and the difference between speed changer output speed or wheel velocity.The turbine trip speed and speed changer output speed or Speed difference between wheel velocity is smaller, until the torsion on power train axis is mitigated.Positive fluid torque-converter output torque Increase DISG speed by the small speed difference between response transformer turbine and speed changer output speed or wheel velocity Increase.When the poor very little between square device turbine and speed changer output speed or wheel velocity, DISG output speed is quicklyd increase So that gear teeth separates.When gear teeth becomes not contact from contact, the speed difference will increase.When square device turbine and speed changer are defeated DISG speed reduces when the difference between speed or wheel velocity increases out, so that the impact force between gear set can reduce.

In one example, once face of fluid torque converter speed subtracts transmission output shaft speed or wheel velocity is more than After threshold level, DISG speed reduces to reduce tooth to the impact force of tooth.In transformer turbine and speed changer output speed DISG speed increases after difference between degree or wheel velocity is less than threshold velocity, to be converted to just from negative drive train torque Gear teeth is kept in contact after drive train torque.Method 3100 proceeds to 3114 after DISG gap adjustment starts.

3114, method 3100 judges whether gear clearance decreases below threshold quantity.In one example, work as positive torque The difference being applied between power train and transformer turbine speed and speed changer output speed or wheel velocity is less than When threshold level, it can determine that gear clearance is less than threshold quantity.If method 3100 judges that gear clearance decreases below threshold value Amount, then answer is "yes" and method 3100 proceeds to 3116.Otherwise method 3100 proceeds to 3112.

3116, method 3100 increases DISG output torque.Since DISG is in speed control molding, DISG output turns Square can respond the drive train torque for passing to engine and reduced driveline speed and increase.In other words, when DISG speed When degree reduces from desired DISG speed, DISG positive torque can increase.In another example, when DISG is in speed control When mode, by according to the torque of power train disconnect-type clutch (for example, the torque of engine is transmitted to from DISG via DISG Amount) increase DISG torque, DISG torque output can be increased.Desired power train disconnect-type clutch torque can with function or The mode of table stores in memory, and responds disconnect-type clutch during engine restarting and be closed torque increase Applied to DISG.Method 3100 proceeds to 3118 after adjusting DISG and showing torque starting engine.

3118, method 3100 restarts engine.The engine is by being at least partly closed power train separate type Clutch and spark and fuel are supplied to engine and is restarted.In some instances, it is closed the clutch of power train separate type Device simultaneously increases DISG output torque and can occur simultaneously, therefore can reduce any drive train torque interference.In engine start Method 3100 proceeds to 3120 after beginning.

3120, method 3100 eliminates the motor torque interference that can be supplied to power train.For example, in engine start Period, engine can consume drive train torque to accelerate during starting.Motor torque interference can be in response to DISG Driveline speed change to eliminate.Since DISG is in speed control mode and follows desired speed, when engine disappears It consumes drive train torque and accelerates that DISG torque can be increased when the power train.In addition, if engine accelerates simultaneously after actuation And torque is supplied to power train, then DISG torque can reduce, so that by DISG and engine application in the net of power train Torque is held essentially constant (for example, ± 30Nm).It in this way, can be with closed loop by adjusting DISG torque transmission system speed Circuit type control.

In another example, drive train torque interference can be adjusted by open loop DISG torque and be eliminated.For example, when transmission When being that disconnect-type clutch starts closure, DISG torque can be increased in speed control mode at DISG.Specifically, pass through Power train disconnect-type clutch torque is added to adjustable DISG torque in DISG torque command.The DISG torque command is rung Should DISG speed be further adjusted.Therefore, if power train disconnect-type clutch torque is too low or excessively high estimation, DISG speed Degree control loop is added to the power train disconnect-type clutch torque error of DISG torque by eliminating.Disappear during engine start The drive train torque interference removed can be rotated in engine start to be started to reach DISG speed and power train point until engine From formula clutch be closed completely between eliminate.Method 3100 carries out after the power train interference during engine start is eliminated To 3122.

3122, method 3100 provides desired torque to power train.The desired torque can be provided separately by DISG, It is provided separately by engine, or is provided by engine and DISG.In one example, DISG torque and motor torque be used as from The driver requested torque portions that accelerator pedal determines provide.For example, if driver requested torque is determined to be in The 100N-m of face of fluid torque converter, engine can provide the 80% of driver requested torque or 80N-m, and DISG is mentioned For 20% or 20N-m, therefore 100N-m is provided to face of fluid torque converter.The rear of power train is supplied in desired torque Method 3100, which proceeds to, to be exited.

It should be pointed out that 3116-3120 can occur simultaneously with 3108-3114 in some instances, so that drive train torque More respond driver requested torque.The gear that speed changer, which is changed to, allows DISG to run lower than basic DISG speed can be with Increasing DISG has restarting motor torque capacity and at the same time mitigating due to the gear impact in Transmission gears gap Possibility.

The example for being used to reduce the gear clearance impact of power train according to the method for Figure 31 is shown referring now to Figure 32, Figure 32 Property timing.The timing of Figure 32 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 32 indicates the graph of relation of engine speed and time.Y-axis indicates engine Speed and engine speed increase along the direction of Y-axis arrow.X-axis indicates the right side of time and time from the left lateral view of figure Side increases.

The second figure from the top of Figure 32 indicates the graph of relation of driver requested torque and time.Y-axis indicates Driver requested torque and driver requested torque increases along the direction of Y-axis arrow.X-axis indicates time and time Increase to the right from the left side of figure.

Third figure from the top of Figure 32 indicates the graph of relation of engine condition and time.Y-axis indicates engine State and when engine condition trace be in it is higher level when engine rotating.When engine condition trace be in compared with Low level is that engine has stopped rotating.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.

The 4th figure from the top of Figure 32 indicates the relation curve of torque converter clutch (TCC) duty ratio and time Figure.Y-axis indicates TCC duty ratio and TCC duty ratio increases along the direction of Y-axis arrow.X-axis indicates time and time from figure Left lateral view right side increase.When TCC duty ratio increases, TCC closing force increases.When TCC duty ratio increases, TCC can be with Lesser torque is transmitted between DISG and speed changer, because fluid torque-converter torque increase can be reduced.When TCC trace is close TCC locked (such as face of fluid torque converter speed is equal to transformer turbine speed) when Y-axis arrow.

The 5th figure from the top of Figure 32 indicates the graph of relation of speed changer shelves and time.Y-axis indicates speed changer shelves And specific speed changer shelves increase along the direction of Y-axis arrow.X-axis indicates the right side of time and time from the left lateral view of figure Side increases.

The 6th figure from the top of Figure 32 indicates the graph of relation of DISG speed and time.Y-axis indicates DISG speed And DISG speed increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases from the right side of the left lateral view of figure Add.Horizontal line 3202 indicates basic DISG speed.

In time T₆₈, for car speed in raised level, driver requested torque is same.Engine operation and Combustion air-fuel mixture.TCC is locked, as shown in being marked as TCC duty ratio in close Y-axis.Speed changer is in fifth speed And DISG speed is in medium level and is higher than DISG base speed 3202.

In time T₆₉, for example, responding the driver requested torque of driver's accelerator-off is reduced to low value.Vehicle Speed, driver requested torque, engine condition, TCC duty ratio, speed changer shelves and DISG speed are maintained at and are similar to In time T₆₈Level.But DISG generates negative torque and produces electricl energy from generating positive torque and consume electric energy and be converted to. Fuel and spark offer to engine also stop, so that engine retard is still continued to rotate without receiving fuel.

In time T₆₉With time T₇₀Between, car speed reduces DISG speed and also reduces.Engine continues to rotate, and such as stops Only shown in the engine condition of higher level, and TCC duty ratio is also maintained at the locked higher level of TCC.Speed change Device is maintained at fifth speed and driver requested torque is maintained at lower level.

In time T₇₀, respond low driver requested torque engine rotation and be stopped, be such as converted to the hair of reduced levels Shown in motivational state mark.Power train disconnect-type clutch (not shown) is opened and DISG response stops engine transitions to speed Spend control model.DISG speed and car speed continue to reduce, and speed changer is maintained at fifth speed.

In time T₇₀With time T₇₁Between, car speed and DISG speed continue to reduce.In this illustration, work as downshift DISG speed is set to be able to maintain transmission downshifts when under basic DISG speed.DISG speed is commanded to based on driver It is required that torque, car speed and selection shelves speed.Such as speed changer is maintained at fifth speed, and DISG speed is reduced to Less than basic DISG speed.If shifting of transmission continues to be reduced to threshold velocity to fourth speed DISG speed, in the threshold value Speed DISG will be less than DISG base speed.When DISG speed be less than threshold velocity when transmission downshifts to fourth speed, and DISG speed increases to the speed based on the DISG speed before gear shift and new gear ratio.

In some instances, during vehicle reduces speed now or driver requested torque is reduced, current DISG speed DISG base speed can be greater than.In these cases, it is reduced in the driver requested torque of the beginning of vehicle deceleration or response Speed changer can upshift, so that DISG speed decreases below DISG base speed.By reducing DISG speed to less than DISG Base speed can provide torque from DISG to restart engine, to reduce the gear teeth pair due to caused by gear clearance The impact of gear teeth.When allowing DISG speed to remain less than DISG base speed, speed changer shelves can downshift.

TCC duty ratio can also respond power train disconnect-type clutch state (not shown), car speed and driver and want The torque asked and reduce.TCC application of force and TCC duty ratio can be adjusted, and open power train separation to reduce to be attributed to Formula clutch and interfered by any torque of power train.Engine keeps stopping, as engine condition is in lower level It is shown.Driver requested torque also keeps low.

It should also be mentioned that when power train changes from generation positive torque to the negative torque of offer or braking moment, power train tooth The gear teeth may from being transmitted to before gear teeth torque gear teeth behind and change.If transformation is not to wish Mode it is processed, then when power train transform back into generate positive torque when impact of the gear teeth to gear teeth may occur.

In time T₇₁, respond driver or controller input driver requested torque and increases.DISG speed increase so as to Separate the tooth in power train.DISG is accelerated according to speed difference of the gear teeth to gear teeth.Specifically, when gear teeth is with identical Speed when DISG accelerated with higher rate, so as to separated tooth.

In time T₇₂, DISG accelerates to reduce and DISG can slow down when the difference between gear teeth increases.Subtract DISG Speed can reduce gear teeth to the impact force of gear teeth by reducing speed between gear teeth.In time T₇₂The very short time it Afterwards, after the space between gear teeth or gap have been eliminated, DISG acceleration can be increased.By wait accelerate DISG until Until gear teeth contact, drive train torque interference can be reduced, and provide and more stably bear positive torque transition.In time T₇₁ With time T₇₃Between TCC slip and application of force be also conditioned or adjust to reduce the interference of the torque in power train.From DISG's Torque starts accelerating vehicle and DISG is converted to torque control model.

In time T₇₃, spark and fuel are supplied to engine and power train disconnect-type clutch is closed to starting hair Motivation.TCC duty ratio and application of force are conditioned to be caused during reducing engine start by closure power train disconnect-type clutch Power train in any torque interference.TCC is locked after the start of engine, to improve drive line efficiency.Moreover, becoming Fast device begins through gear shift with accelerating vehicle.

In this way, it can reduce Transmission gears tooth when power train generates Mode change to torque from braking mode Between gap and impact.By adjusting DISG speed and torque in this way, it can reduce and driver is significantly driven It is torque interference.

Therefore, the method and system of Fig. 1-3 and Figure 31-32 provides control driveline lash, comprising: response is driver requested Torque reduce the motor speed low in the base speed than the motor that speed changer is changed to and allows to be connected to the speed changer The lower gear run of degree；It is somebody's turn to do with during drive train torque changes from negative torque to positive torque by being run with speed control mode Motor reduces impact of the gear teeth to gear teeth.This method further includes in drive train torque from negative torque to positive torque tour Between reduce torque converter clutch application of force.This method further includes that the driver requested torque of response reduces stopping engine Rotation.

In one example, this method further includes that the driver requested torque of response reduces opening power train separate type clutch Device.This method further includes that first gear tooth and second gear tooth are responded during changing in drive train torque from negative torque to positive torque Between speed difference adjust the speed of the motor.This method further includes that response car speed makes transmission downshifts.This method is also Including during drive train torque changes from negative torque to positive torque tightly before running the motor with speed control mode with Torque control model runs the motor.

The method and system of Fig. 1-3 and Figure 31-32 provides control driveline lash, comprising: turns in drive train torque from negative Square reduces impact of the gear teeth to gear teeth by running the motor with speed control mode to during positive torque transformation；With Drive train torque separates the first gear tooth during changing from negative torque to positive torque and second gear tooth accelerates the motor.It should Method further includes responding the increase of the speed difference between the first gear tooth and second gear tooth to slow down the motor.This method is also Reduction including responding the speed difference between the first gear tooth and second gear tooth after the motor that slows down accelerates the electricity Motivation.

In one example, this method includes that the transformation from negative torque to positive torque is in response to driver requested torque Increase.This method further includes the reduction of the driver requested torque of response, before reducing gear teeth to the impact of gear teeth, is beaten Open the power train disconnect-type clutch for being connected mechanically to the motor.This method further includes reducing gear teeth to gear teeth Before impact, the reduction of driver requested torque is responded, reduces torque converter clutch application of force.This method further includes this Electromotor velocity is controlled as the function of the speed difference between first gear tooth and second gear tooth.

The method and system of Fig. 1-3 and Figure 31-32 provides a kind of vehicle biography system, comprising: engine；Including mechanically connecting It is connected to the double mass flywheel of the first side of the engine；The first side including being connected mechanically to second side of the double mass flywheel Power train disconnect-type clutch；Transmission assembly including being connected to first side of second side of the power train disconnect-type clutch At starter/generator (DISG)；The speed changer of the engine is selectively connected to via the power train disconnect-type clutch； And controller, the controller include executable non-transient instruction, to be automatically stopped engine, turn in drive train torque from negative Square reduces gear teeth to the impact of gear teeth and starting by running DISG with speed control mode to during positive torque transformation Engine rotates while reducing impact of the gear teeth to gear teeth.

In one example, which includes starting engine rotation by being closed the power train disconnect-type clutch Turn.The Vehicular system further includes additional instruction, with adjusted when reducing gear teeth to the impact of gear teeth fluid torque-converter from Clutch application of force.The Vehicular system further includes additional instruction, reduces the opening power train to respond driver requested torque Disconnect-type clutch.The Vehicular system further includes additional instruction, is at least partly closed this to respond operator torque request Power train disconnect-type clutch is to start engine.The Vehicular system further includes additional instruction, to make during vehicle deceleration Shifting of transmission rotates the gear of DISG to the speed to be less than DISG base speed.

The process of method for changing vehicle braking from power train to friction catch is shown referring now to Figure 33, Figure 33 Figure.The method of Figure 33 can store in the non-transient memory in the system of Fig. 1-3 as executable instruction.

Referring now to 3302, method 3300 estimates vehicle mass and road grade.In one example, road grade can be with Estimate or measure by gradient meter.Vehicle mass can be determined as described in the 904 of method 900.Determine vehicle mass and Method 330 proceeds to 3304 after road grade.

3304, method 3300 judges whether vehicle is slowing down or whether reduced driver is driver requested and turns Square.The driver requested torque reduced can be determined from the release of accelerator pedal.If method 3300 judges vehicle deceleration Or there is the driver requested torque reduced, then answer is "yes" and method 3300 proceeds to 3306.Otherwise answering is "No" and method 3300, which proceed to, to be exited.

3306, whether method 3300 judges the state of charge (SOC) of energy accumulating device less than the threshold quantity to charge.? In one example, SOC can be determined by measurement battery voltage.If energy accumulating device SOC is less than the threshold quantity of charging, Then answer is "yes" and method 3300 proceeds to 3308.Otherwise answering is "No" and method 3300 proceeds to 3312.

3308, method 3300 stops paying out motivation and rotates and open power train disconnect-type clutch.By stopping supply hair Motivation fuel and spark stop engine.The method 3300 after stopping engine rotation and opening power train disconnect-type clutch Proceed to 3310.

3310, method 3300 runs DISG with generator mode and charges to energy accumulating device.In hair generator DISG provides negative torque to vehicle transmission system in mode.In one example, the amount that DISG is supplied to the negative torque of power train can It is adjusted with responding car speed and driver requested torque.In another example, DISG is supplied to the negative of the DISG The amount of torque can be adjusted the braking moment for the engine estimated under current working, as described herein.? The rate of 3310 vehicle decelerations can store in memory.The method 3300 after DISG starts to charge to energy accumulating device Proceed to 3304.

3312, method 3300 starts to reduce negative DISG torque.Moreover, in some instances, power train separate type clutch Device can be closed so that engine is capable of providing power train braking.In one example, response passes through the clutch of power train separate type The negative DISG torque of amount of torque that device passes to engine is reduced towards zero-turn square.The reduction of the negative torque of DISG is based on charging current It reduces.Method 3300 proceeds to 3314 after DISG torque starts to reduce.

3314, method 3300 passes through the present road gradient and vehicle deceleration estimated wheel torque.The wheel torque can be with It is determined according to following equation:

F=ma

So that

T_wh=maR_rr+R_rrgmsin (Θ)

Wherein F is equal to the power of acceleration/deceleration vehicle, and m is vehicle mass, the rolling radius of R_rr wheel, and a indicates that vehicle adds Speed, g is acceleration of gravity, and Θ is road angle.Method 3300 proceeds to 3318 after determining wheel torque.

3316, method 3300 responds wheel torque and negative DISG torque reduces (for example, towards zero DISG torque) and adjusts Brake supplies oil pressure.Specifically, method 3300 gradually rises the oil pressure for being supplied to vehicle friction brake and reduction simultaneously The negative torque of DISG.Vehicle friction brake power is increased with the rate for balancing the negative torque reduction of DISG, to provide equivalent vehicle deceleration Rate.In one example, open loop brake piping oil pressure related with braking friction responds desired wheel braking torque From table or index functions, the table or function include empirically determined brake piping oil pressure.By friction catch provide this wish The wheel braking torque of prestige is that the reduction amount of DISG torque is subtracted by 3314 wheel torque multiplied by current transmission gear Than being obtained with axle ratio.Brake piping oil pressure is gradually increased to provide the pressure of desired wheel braking torque.In this way, The closed-loop control of wheel braking can be realized according to vehicle torque.In addition, in some instances, power train disconnect-type clutch It can be closed and respond the reduction of DISG torque and other operating condition engines rotate in the case where no fuel to provide biography Dynamic is braking moment.Method 3300 proceeds to after brake piping oil pressure gradually rises and the negative torque of DISG gradually decreases 3318。

In other examples, brake piping oil pressure can be estimated by the open loop of brake application power to increase, and brakes Application of force can also be adjusted according to the difference between the desired car speed and actual car speed.In this way, vehicle Speed difference can be the closed-loop parameters for adjusting friction brake force.

3318, method 3300 judges whether there is the brake request from driver.In one example, driver is come from Brake request can from the position of brake pedal determine.If there is the brake request from driver in the judgement of method 3300, Then answer is "yes" and method 3300 proceeds to 3320.Otherwise answering is "No" and method 3300 proceeds to 3322.

3320, brake piping oil pressure responds driver requested input and increases.In one example, to friction catch The increase proportional to the displacement of brake pedal of brake piping oil pressure.Increase brake piping oil pressure in response operator brake order Method 3300 proceeds to 3322 later.

3322, method 3300 judges whether vehicle stops.When car speed is zero, vehicle can be judged as stopping. If vehicle is judged as stopping, answer is "yes" and method 3100 proceeds to and exits.If vehicle is not judged as stopping Only, then answering is "No" and method 3300 returns to 3312.

It is shown referring now to Figure 34, Figure 34 and changes vehicle braking from power train to friction catch for the method according to Figure 33 Exemplary timing.The timing of Figure 34 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 34 indicates the graph of relation of car speed and time.Y-axis indicates car speed And car speed increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases to the right from the left side of figure.

The second figure from the top of Figure 34 indicates the graph of relation of power train disconnect-type clutch state and time.Y Axis indicates power train disconnect-type clutch state and is driven when power train disconnect-type clutch state trace is close to Y-axis arrow Be disconnect-type clutch be closure.The power train separate type clutch when power train disconnect-type clutch state trace is close to X-axis Device is open.X-axis indicates the time and the time increases to the right from the left side of figure.

Third figure from the top of Figure 34 indicates the graph of relation of engine condition and time.Y-axis indicates engine State, and when engine is rotating engine condition trace when higher horizontal.When engine condition trace is lower Engine has stopped rotating when horizontal.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.

The 4th figure from the top of Figure 34 indicates the graph of relation of battery charge state (SOC) and time.Y-axis table Show battery SOC and SOC increases along the direction of Y-axis arrow.X-axis indicates the right side of time and time from the left lateral view of figure Side increases.

The 5th figure from the top of Figure 34 indicates the graph of relation of DISG torque and time.Y-axis indicates DISG torque And DISG torque can be positive or negative.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.

The 6th figure from the top of Figure 34 indicates the brake-press lead oil pressure and the graph of relation of time of friction catch.Y Axis indicates brake-press lead oil pressure and brake-press lead oil pressure increases along the direction of Y-axis arrow.X-axis indicate time and time from The right side of the left lateral view of figure increases.

The 7th figure from the top of Figure 34 indicates the graph of relation of wheel torque and time.Y-axis indicates wheel torque And wheel torque increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases from the right side of the left lateral view of figure Add.

In time T₇₄, car speed raising, engine is being run, and power train disconnect-type clutch is closed.Battery SOC It is relatively low and with DISG to power train provide positive torque reducing.It is not answered as brake-press lead oil pressure is in shown in low-level Use friction catch.Wheel torque is positive.

In time T₇₅, driver's accelerator-off (not shown).After a short while, response is from accelerator pedal Low driver requested torque, DISG torque are converted to negative torque from positive torque.By being converted to negative torque, DISG provides braking Torque keeps vehicle slack-off.Moreover, DISG generates charge and charge is supplied battery, as shown in increased battery SOC.It rubs It wipes brake-press lead oil pressure and is maintained at the low-level for indicating not time friction catch.Response DISG, which is converted to, provides negative torque, wheel Torque is converted to negative torque from positive torque.In addition, power train disconnect-type clutch is opened and engine rotation stops.Engine Stop saving fuel and power train disconnect-type clutch opening so that DISG is capable of providing whole power trains brakings.DISG is mentioned Confession power train braking amount can empirically determined and as car speed and driver requested torque function deposit Storage is in memory.

In this illustration, driver does not apply brake pedal after unclamping accelerator pedal.But in some examples In, driver's application braking after unclamping accelerator pedal.In such an example, the brake command for responding driver can be with Increase brake-press lead pressure.

In time T₇₅With in time T₇₆Between, the negative torque of DISG increases, and is until generating desired power train braking moment Only.When power train braking moment increases, negative vehicle torque also increases.Driver does not apply brake pedal and battery SOC increases Add.Power train disconnect-type clutch stays open and engine rests on halted state.

In time T₇₆, response DISG reaches threshold quantity (for example, filling completely to the battery offer SOC that charges a battery Electricity).The negative torque of DISG reduces and is supplied to the quantity of electric charge reduction of battery.Brake-press lead oil pressure also increases and allows to pass through Friction catch keeps wheel torque.Brake-press lead oil pressure increases according to the reduction of the negative torque of DISG.In one example, it rubs Brake force reduces to adjust according to wheel torque and DISG torque.It is slack-off in order to turn a wheel in some other examples, Applied friction brake force can be adjusted according to the difference between desired car speed and actual car speed.Vehicle speed Degree continues to reduce and power train disconnect-type clutch stays open.Moreover, engine keeps stopping.

In time T₇₇, the response negative torque of DISG is reduced and responds operating condition, power train disconnect-type clutch closure and There is no engine in the case where fuel injection to rotate.For example, engine can respond the reduction of DISG torque and from DISG torque Change the later time and rotates.Engine is rotated to provide braking moment with not having fuel.And pass through activation or deactivated gas Door and/or with air throttle and/or the adjustable engine braking torque of valve adjustments intake manifold pressure.Response is mentioned by engine The power train braking moment brake-press lead oil pressure of confession reduces.Specifically, brake-press lead oil pressure reduces such a amount, this amount subtracts Few torque provided by friction catch also mentions so even power train braking is not increased by rotation to the engine of fuel For equivalent wheel braking.

In time T₇₈, car speed is close to zero velocity.Response car speed is being reduced to the transmission of threshold value car speed It is that disconnect-type clutch is opened and engine rotation stops.Since DISG does not provide positive torque to power train and does not consume storage Battery charging, battery SOC are maintained at higher level.When engine braking stops, brake-press lead oil pressure increases.Brake pipe Road oil pressure increases the power for applying increase to wheel by friction catch.

In time T₇₉, car speed reaches zero velocity, and wheel torque and brake-press lead oil pressure are reduced to zero.At one In example, brake-press lead oil pressure can be kept to make stoppage of vehicle in zero velocity until driver is logical when car speed reaches zero It crosses until accelerator pedal increases driver requested torque.Engine keeps stopping and power train disconnect-type clutch is kept In opening state.

In this way, friction catch can be applied when power train braking response battery SOC reduces so that vehicle becomes Slowly.Moreover, engine rotation can stop and start further to control power train braking.According to the wheel torque of estimation and/ Or the difference between desired speed and actual speed can apply friction torque.

Therefore, the method and system of Fig. 1-3 and Figure 33-34 provides vehicle braking, comprising: provides power train braking to vehicle Torque is without to vehicle application friction braking torque；Increasing with response energy accumulating device state of charge to vehicle friction brake Power train braking moment, the amount that the increased amount of the friction braking torque and power train braking moment are reduced are reduced while torque It is identical.In this way, vehicle can be to be converted to friction catch from power train braking to the less obvious mode of driver.

In one example, this method includes that the rate that is reduced of power train braking moment increases equal to friction braking torque Rate.This method includes that the engine of the vehicle when providing power train braking moment to vehicle does not rotate.This method is included in Power train disconnect-type clutch is open when providing power train braking moment.This method includes that response is less than driving for threshold torque The torque that the person of sailing requires provides power train braking moment.This method includes that the driver requested torque of response further increases friction Braking moment.

The method and system of Fig. 1-3 and Figure 33-34 also provides vehicle braking, comprising: provides power train braking to vehicle and turns Square is without to vehicle application friction braking torque；Estimated wheel torque；With the wheel torque energy accumulating device for responding the estimation State of charge reduces power train braking moment while increasing the friction braking torque to vehicle.This method includes response estimation Wheel torque increase friction braking torque.This method includes vehicle mass of the wheel torque based on estimation of estimation.

In some instances, this method includes that the wheel torque of estimation is accelerated based on vehicle.This method further includes rotation hair Motivation is without giving engine fuel.This method further includes that the engine braking torque of response estimation adjusts friction braking torque.It should Method includes the engine stop of vehicle.

The method and system of Fig. 1-3 and Figure 29-30 also provides a kind of Vehicular system, comprising: engine；Including mechanically connecting It is connected to the double mass flywheel of the first side of the engine；It mechanically include the first side for being connected to second side of the double mass flywheel Power train disconnect-type clutch；Transmission assembly including being connected to first side of second side of the power train disconnect-type clutch At starter/generator (DISG)；The speed changer of engine is selectively connected to by the power train disconnect-type clutch；It rubs Wipe brake；And controller, the controller include executable non-transient instruction, to be automatically stopped engine rotation, pass through DISG provides power train braking moment, applies friction catch when reducing power train braking moment.

In one example, which further includes additional instruction, to be rubbed according to the application of the wheel torque of estimation Braking.The Vehicular system further includes additional instruction, reduces power train braking turn to respond the state of charge of energy accumulating device Square.The Vehicular system further includes that the state of charge of response energy accumulating device is greater than the threshold quantity reduction power train braking turn of charging Square.The Vehicular system further includes additional instruction, to apply friction catch according to car speed.The Vehicular system further includes passing through Increase brake-press lead oil pressure to apply friction catch.The Vehicular system further includes additional instruction, is subtracted with responding zero car speed Few friction catch application of force.

Referring now to Figure 35, Figure 35 show when from power train braking be converted to vehicle accelerate simultaneously transmission gear do not occur For reducing the flow chart of the method for drive train torque interference related with gear clearance when variation.The method conduct of Figure 35 can be held Capable instruction can store in the non-transient memory in the system of Fig. 1-3.

3502, method 3500 judges whether vehicle is stepped on whether deceleration or driver at least partly unclamp accelerator Plate.Method 3500 can judge that vehicle is slowing down by monitoring car speed.Method 3500 can respond the position of accelerator pedal Judge that driver at least partly unclamps accelerator pedal.Add if method 3500 judges that driver partly unclamps Fast device pedal or vehicle are slowing down, then answer is "yes" and method 3500 proceeds to 3504.Otherwise it is "No" and square for answering Method 3500, which proceeds to, to be exited.

3504, method 3500 determines the amount of desired vehicle braking torque.The amount of the desired vehicle braking torque can With it is empirically determined and it is stored in memory by car speed and the function of driver requested torque index or In table.Therefore, the amount of vehicle braking torque can change during vehicle deceleration.In one example, vehicle braking torque is In the amount for the braking that wheel provides.Method 3500 proceeds to 3506 after the amount for determining desired vehicle braking torque.

3506, method 3500 stop engine rotating and open power train disconnect-type clutch with save fuel and Therefore the power train that higher level can be provided via DISG is braked.It can permit via the biggish power train braking amount of DISG Energy accumulating device or battery are recharged with higher rate.Torque converter clutch (TCC) is adjusted to locking State, enable during deceleration DISG be provided additional energy.It is beaten in engine stop, power train disconnect-type clutch Open and TCC it is locked after method 3500 proceed to 3508.

3508, method 3500 judges whether the state of charge (SOC) of energy accumulating device or battery is greater than threshold value electricity Lotus amount.If method 3500 judges that energy accumulating device SOC is greater than threshold value SOC, answer is "yes" and method 3500 carries out To 3512.Otherwise answering is "No" and method 3500 proceeds to 3510.

3510, method 3500 is by increasing brake-press lead oil pressure application friction catch.Brake-press lead oil pressure can pass through Pump is to increase.Friction catch applies the power according to desired vehicle braking torque.In one example, table or function output braking Pipeline oil pressure, the oil pressure are estimated to provide the power of desired vehicle braking torque.In some instances, brake-press lead oil Pressure can respond the difference between the torque or desired and actual car speed as described herein of estimation to adjust.It rubs in adjusting Method 3500, which proceeds to, after wiping braking exits.

3512, method 3500 provides negative drive train torque into DISG and is the regeneration mould of energy accumulating device charging Formula.Specifically, it adjusts by negative torque that DISG export to provide the desired vehicle braking selected including adjusting transmission gear Torque.In one example, the negative torque of DISG can be adjusted by adjusting DISG charging current.Adjust the negative torque of DISG with Method 3500 proceeds to 3514. after providing desired vehicle braking torque

3514, method 3500 judges whether to have required the torque of positive drive system.The torque of positive drive system can pass through driving Member steps on accelerator pedal (for example, increasing driver requested torque) or is required by controller.If method 3500 is sentenced Disconnected to have required the torque of positive drive system, then answer is "yes" and method 3500 proceeds to 3516.Otherwise, answer be "No" and Method 3500 carries out 3508.

3516, method 3500 increases torque converter clutch (TCC) sliding by reducing TCC application of force.At one In example, the duty ratio for being supplied to electric actuator is reduced to reduce TCC application of force.TCC slip can increase to scheduled According to the amount of empirically determined sliding.In one example, TCC slip is based on the increased amount of desired drive train torque.It is sliding in TCC Method 3500 proceeds to 3518 after dynamic increase.

3518, the amount of regenerative brake is reduced by reducing the negative torque of DISG.Regenerative brake torque is towards zero DISG torque output is reduced.Method 3500 proceeds to 3520 after starting to reduce regenerative brake torque.

3520, method 3500 judge regenerative brake torque whether in the torque range of scheduled zero-turn square (for example, ± 2N-m).In one example, regenerative brake torque can be estimated according to DISG charging current.If method 3500 Regenerative brake torque is judged in the torque range of scheduled zero-turn square, then answer is "yes" and method 3500 proceeds to 3522.Otherwise, answer is "No" and method 3500 returns to 3518, is further reduced in 3518 regenerative brakes.

3522, method 3500 is converted to from torque control model operation DISG with speed control mode operation DISG. DISG speed is arranged to be greater than the speed of the predetermined speed of transformer turbine speed.Since DISG is connected to hydraulic moment changeable Device pump impeller, face of fluid torque converter speed are greater than transformer turbine speed.By the way that DISG speed is adjusted to be greater than fluid power The speed of torque converter turbine speed, small positive torque pass to transmission input shaft by fluid torque-converter.Small positive torque disappears Except the gap between transmission gear between vehicle bridge gear, therefore it can reduce the impact between gear.When scheduled The area of a room or until the speed difference between first gear and second gear is that zero DISG is commanded to scheduled speed.Between gear Speed can be determined from transmission input speed and transmission output shaft speed.

Speed difference after DISG runs scheduled time quantum at a predetermined rate, or between gear be zero it Afterwards, DISG speed increases.In one example, DISG speed increases according to fluid torque-converter model.Specifically, fluid torque-converter Turbine trip speed and one or more functions of desired amount of torque index transmitted by fluid torque-converter, the output of these functions mention For the DISG speed of desired amount of torque.Desired amount of torque is based on driver requested torque.It is conditioned simultaneously in DISG speed And gear clearance be eliminated after method 3500 proceed to 3524.

3524, method 3500 be maintained at speed control mode and according to the amount of the torque of the starting engine of estimation come Adjust DISG electric current.Just as described in the previous, when DISG is in speed control mode, be supplied to the electric current of DISG according to Error between desired DISG speed and actual DISG speed is adjusted.In addition, 3524, response closure power train separation Formula clutch increases DISG electric current to rotate and start engine.In one example, the increase of DISG electric current is based on power train Disconnect-type clutch transmission function, the transmission function is based on the application of force output torque amount for being applied to torque converter clutch. For example, if transmission function indicates transmitting the positive torque of 25N-m in current application of force underdrive system disconnect-type clutch, Then DISG electric current, which increases to, provides the level of the positive torque of additional 25N-m.Power train disconnect-type clutch application of force can be abided by It follows and is stored in track empirically determined in controller storage.In this way, it is answered based on power train disconnect-type clutch Open-loop current firmly is supplied to DISG, allows and DISG velocity variations very little and closed loop DISG speed control is mentioned It is corrected for lesser speed.After DISG speed and torque are conditioned, method 3500 proceeds to 3526.

3526, method 3500 starts engine.In engine rotation by providing spark and fuel hair to engine Motivation is activated.Engine is accelerated to DISG speed and then power train disconnect-type clutch is closed.It is separated in power train Motor torque and/or DISG torque are supplied to power train after formula clutch closure.It is closed in power train disconnect-type clutch DISG is also converted to torque control model from speed control mode after conjunction.

Show what the gear clearance for reducing power train for the method according to Figure 35 was impacted referring now to Figure 36, Figure 36 now Exemplary timing.The timing of Figure 36 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 36 indicates the graph of relation of engine speed and time.Y-axis indicates engine Speed and engine speed increase along the direction of Y-axis arrow.X-axis indicates the time and the time increases to the right from the left side of figure Add.Horizontal line 3502 indicates the speed of the face of fluid torque converter during this timing.

The second figure from the top of Figure 36 indicates pedal position, and (such as accelerator pedal 3606(is driver requested turns Square) and brake pedal 3604) with the graph of relation of time.Y-axis indicates pedal position and pedal position is along Y-axis arrow Direction increases.X-axis indicates the time and the time increases to the right from the left side of figure.

Third figure from the top of Figure 36 indicates the relation curve of torque converter clutch (TCC) capacity and time Figure.Y-axis indicates TCC capacity, and TCC capacity increases along the direction of Y-axis arrow.X-axis indicates time and time from figure The right side of left lateral view increases.

The 4th figure from the top of Figure 36 indicates the graph of relation of power train disconnect-type clutch state and time.Y Axis indicates power train disconnect-type clutch state and the power train separate type when trace is in close to the higher level of Y-axis arrow Clutch state is to be applied completely.The power train disconnect-type clutch pine when power train disconnect-type clutch state is close to X-axis It opens.When power train disconnect-type clutch state increases, power train separation applying pressure increases.When power train disconnect-type clutch Increase when state trace level increases in the amount of torque of power train disconnect-type clutch two sides transmitting.X-axis indicate the time and when Between increase from the right side of the left lateral view of figure.

The 5th figure from the top of Figure 36 indicates power train integrated actuating machine/generator (DISG) torque and time pass It is curve graph.Y-axis indicates DISG torque and DISG torque increases along the direction of Y-axis arrow.X-axis indicates time and time Increase from the right side of the left lateral view of figure.

The 6th figure from the top of Figure 36 is indicated in the transmission torque of transmission input shaft and the relation curve of time Figure.Y-axis indicates transmission input shaft torque and transmission input shaft torque increases along the direction of Y-axis arrow.When X-axis indicates Between and the time increase from the right side of the left lateral view of figure.

Figure 36 shows the example operation of engine restarting, and wherein torque converter clutch operation is modulated to control Transmission gear is kept simultaneously by the conversion of transmission gear interstitial area (for example, the zero-turn square for passing through speed changer).One is shown Example includes following method: power train disconnect-type clutch is connect when by stepping on accelerator pedal (for example, pressure accelerator pedal) It closes, and DISG rotary engine accelerates to the speed (for example, 250RPM) at least starting rotation.Supply engine with fuel and Engine combustion provides torque with acceleration motor, while being started by DISG torque (opposite with the starting of starter motor type) Machine speed continues to rise.This operation provides the fast engine torque for driving vehicle.But it is this fast due to torque Speed increases the metallic sound that can cause through gear clearance area, and torque converter clutch is least partially open and is selected Property modulate with control by gear clearance area conversion and reduce wheel torque rising rate, until conversion pass through gear After interstitial area.Therefore, DISG output torque can be adjusted to control power train by the transition period in gear clearance area Torque output.

Will now be described can be attached across being adjusted about gear clearance in control used in gap recited above The details added.As explained herein, in the torque that the torque from DISG is enough accelerating vehicle and meets the requirements, overcome It when road load, will stop in vehicle, stop or when movement/driving, engine can be shut down and power train separate type Clutch is opened, such as in time T₈₀It is shown.

Specifically, it (for example, closure accelerator pedal event) and is sent out the case where operator does not require drive train torque During motivation does not rotate, DISG can be used as generator operation, provides regeneration, comes alternately or additionally in the cause by brake pedal The dynamic wheel braking required by operator.In this way, DISG is braked instead of power train, if engine is rotating this biography Dynamic system's braking has already appeared.DISG charges a battery again according to battery SOC or provides electric power for auxiliary device.Then, When operator is by stepping on the additional output of accelerator pedal requirement, engine can be restarted to compensate and/or substitute DISG output torque.This conversion includes across transmission gear interstitial area (for example, finally driving list in speed changer or speed changer In member, and/or after speed changer in differential mechanism).Specifically, this is as previously indicated herein, during power train braking When operator steps on accelerator pedal, positive DISG and motor torque are applied to power train and power train is subjected to torque reversal (for example, bearing positive torque conversion).Torque reversal causes power train to pass through interstitial area (for example, the tooth in rear differential mechanism is to tooth Gear space).

In time T₈₁, brake pedal is unclamped by driver, and TCC capacity is reduced, as TCC capacity trace is reduced institute Show.Moreover, response due to brake pedal be released thus the braking of lesser power train be required that the negative torque of DISG is towards zero-turn square Reduce.Response DISG torque also reduces in decline transmission input shaft torque.

In time T₈₂, driver steps on accelerator pedal, therefore it is required that increasing power train positive torque.After a short while, DISG torque is just changing from negative sense and TCC capacity is reduced by increasing TCC slip.Respond the increase of accelerator pedal position Power train disconnect-type clutch also starts to be closed.Closure power train disconnect-type clutch starts acceleration motor.Speed changer input Shaft torque is gradually reduced to zero-turn square from small negative torque.In time T₈₂With time T₈₃Between, respond first gear tooth and second Poor TCC capacity between gear teeth speed is reduced.Speed difference between gear teeth is reversed from drive train torque.

In time T₈₃, gear teeth is in its maximum level to the speed difference of gear teeth between gear, and then works as tooth Wheel gap starts to reduce when reducing.It responds gear teeth speed difference between gear to reduce, TCC capacity increases.Respond the raker tooth of gear Gear teeth speed difference reduces DISG torque and also increases, so that gap can reduce.Power train disconnect-type clutch state continues growing, Indicate that the amount for the torque that power train disconnect-type clutch can transmit is increasing.Accelerator pedal position and car speed also continue Increase.

In time T₈₄, engine speed reaches face of fluid torque converter speed (identical as DISG speed).Respond engine Speed reaches face of fluid torque converter speed, and TCC capacity and power train disconnect-type clutch also increase.By waiting until starting Machine speed is equal to face of fluid torque converter speed to be closed completely power train disconnect-type clutch, can reduce and turn in power train Square interference.Torque of the drive train torque increase on transmission input shaft is responded from negative torque conversion to positive torque.It is passed in response Dynamic is the torque that is closed completely on transmission input shaft of disconnect-type clutch after negative torque conversion to positive torque, DISG torque Also increase.

The illustrative methods of this timing recognize that several seem incoherent information, comprising: (1) when power train point Motor torque and DISG torque are superpositions when being closed from formula clutch 236；(2) since assembling limits, especially and to dynamic The related limitation of limitation of power power train length and diameter, the torque capacity of DISG are intended to turn significantly lower than maximum engine Square；(3) DISG torque is the function of DISG speed, and when clutch is closed completely, DISG speed is equal to engine speed；(4) DISG torque more consistently reaches about 1, the threshold value pump impeller speed of 000 ± 100RPM, and then DISG torque and DISG Speed is inversely proportional, and is called constant power area, until the eddy current and unknown losses of friction reduce torque faster and with higher Threshold velocity (for example, about 3,000 ± 500RPM) increasing pump wheel speed.

Therefore, in the case where engine is shut down during pedal event in closure (for example, accelerator is not applied) such as Fruit powertrain is run with regenerated braking mode, then operator steps on accelerator pedal.If DISG is capable of providing hope Torque engine can remain turned off.Then, power train disconnect-type clutch can stay open and DISG can be quickly It is converted to close to zero-turn square.DISG is run with speed control mode and slowly transformation passes through gear clearance area.It is logical in transformation DISG quicklys increase torque to provide desired torque after crossing gear clearance area.In this way, in drive train torque from negative Torque conversion is to the torque that can reduce audible noise and pulse during positive torque and pass through power train.

Therefore, Fig. 1-3 and Figure 35-36 method and system provide operation power train, comprising: stop engine rotation and Regenerative brake is provided by power train；It is converted to provide to power train from regenerative brake and rotates forward torque conversion；With in tour Between with speed control mode run power train integrated actuating machine/generator.This method, which is included in run with speed control mode, to be passed Before and after dynamic assembly is at starter/generator, power train integrated actuating machine/generator is run with torque control model.It should Method includes that power train integrated actuating machine/generator is adjusted to the speed based on transformer turbine speed.

In one example, this method is included in opening power train disconnect-type clutch when engine is stopped.This method It further include being closed power train disconnect-type clutch after running power train integrated actuating machine/generator with speed control mode To start engine.This method further includes that regenerative system is provided when the state of charge of energy accumulating device is less than threshold value charge It is dynamic.This method further include from regenerative brake be converted to power train provide positive torque during increase torque converter clutch Sliding.

The method and system of Fig. 1-3 and Figure 35-36 provides operation power train, comprising: stops engine and rotates and pass through Power train integrated actuating machine/generator provides regenerative brake；Make power train integrated actuating machine/generator from the regenerative system of offer Turn changes to power train and provides positive torque；The transformation tune of positive torque is provided from offer regenerative brake to power train with response Save the sliding of torque converter clutch.It further include turning power train integrated actuating machine/generator from regenerative brake is provided It changes to and power train integrated actuating machine/generator is run with speed control mode during providing positive torque to power train.

In one example, this method includes being passed with the speed operation for being greater than the predetermined speed of transformer turbine speed Assembly is moved into starter/generator.This method further includes increasing speed in response to the reduction of gear clearance.This method includes adjusting The sliding of torque converter clutch includes increasing torque converter clutch sliding.This method includes making power train integrated actuating Machine/generator is converted to power train offer positive torque from offer regenerative brake and is in response to increased torque-demand.This method It further include starting hair by closure power train disconnect-type clutch while adjusting the sliding of this torque converter clutch Motivation.

The method and system of Fig. 1-3 and Figure 35-36 also provides a kind of power car system, comprising: engine；Motor； Power train disconnect-type clutch between the engine and generator is set；Speed changer；It is arranged in the motor and speed changer Between fluid torque-converter；And the controller including executable non-transient instruction, for by being transported with speed control mode Row motor and the speed of the motor is adjusted to reduce the gear clearance in speed changer.The Vehicular system further includes that fluid power becomes Square device clutch and additional executable instruction, when motor is to slide fluid torque-converter clutch with speed control mode operation Device.

In some instances, which further includes additional executable instruction, to be greater than the fluid torque-converter The predetermined speed of the speed of turbine runs the motor.The Vehicular system further includes additional executable instruction, with pre- Increase the speed of the motor after fixed speed service meter.The Vehicular system further includes additional executable instruction, To provide power train braking moment by motor.The Vehicular system further includes additional executable instruction, with speed Control model runs the motor and reduces power train braking moment towards zero-turn square before.

The illustrative methods of sail mode for entering power train operation are shown referring now to Figure 37, Figure 37.Figure 37's Method can store in the non-transient memory of the controller 12 of Fig. 1-3 as executable instruction.

In one example, sail mode is characterized in burning within the engine when power train disconnect-type clutch is opened Air-fuel mixture, therefore engine does not provide substantially DISG, fluid torque-converter and speed changer torque (for example, being less than ± 5N-m).Sail mode may include the navigation idling speed lower than base idle revolving speed, which is if hair The speed that engine is run when motivation is connected to power train by the power train disconnect-type clutch being closed with it.In sail mode Idling speed it is relatively low, therefore fuel can be saved in sail mode.Moreover, the spark timing in sail mode can compare Spark timing of the engine with the operation of base idle revolving speed and when power train disconnect-type clutch is closed more shifts to an earlier date.Substantially idle Fast revolving speed can be described as when engine prewarming and without auxiliary loads be applied to engine when and when engine passes through Power train disconnect-type clutch is connected to engine idle rotational when DISG.Engine can be run simultaneously with low engine speed And in sail mode than during using basic idling speed spark timing more shift to an earlier date because offset may be applied to biography The smaller reserve torque of the transient load of dynamic system may be necessary.

3702, method 3700 determines operating condition.Operating condition can include but is not limited to drive train torque demand, power train separation Formula clutch state, engine speed, car speed, DISG torque and battery charge state.At the rear that operating condition is determined Method 3700 proceeds to 3704.

3704, method 3700 judges whether desired drive train torque is greater than the threshold that the power train is supplied to by DISG It is worth amount of torque.Threshold torque amount can be more slightly smaller than specified DISG torque (for example, small 10%).In one example, available DISG amount of torque can estimate that the empirically determined value is stored in by DISG speed and DISG from empirically determined value In the table of temperature index.The table exports the maximum or available amount of torque that power train can be supplied to by DISG.At other In example, available or threshold value DISG torque is less than maximum DISG torque, so if desired drive train torque connects Nearly maximum DISG torque, engine may remain in sail mode.Moreover, threshold value DISG torque can respond such as DISG The operating condition of temperature increases or decreases.Method 3700 by from table output and desired drive train torque amount be compared.If Method 3700 judges that desired amount of torque is greater than the DISG torque of threshold value, then answer is "yes" and method 3700 proceeds to 3706.Otherwise, answer is "No" and method 3700 proceeds to 3716.

3706, method 3700 is closed power train disconnect-type clutch to rotate and start engine.Power train separate type Clutch can be closed according to scheduled closed trajectory stored in memory.Alternatively, engine can pass through Starter starting except DISG, and engine accelerates to DISG speed and is closed the power train disconnect-type clutch later.? Torque converter clutch sliding can be increased and reduce drive train torque interference to respond desired torque.It is separated in power train Method 3700 proceeds to 3708 after formula clutch starts closure.

3708, method 3700 supplies fuel to engine and opens if engine not combustion air and then mixture Dynamic engine.Fuel and spark can be supplied to engine cylinder in order to burn wherein.Start in engine start rotation Method 3700 proceeds to 3710 later.

3710, method 3700 judges whether energy accumulating device (for example, battery) state of charge is greater than threshold quantity.? In one example, battery charge state can be estimated from battery voltage.If method 3700 judges battery charge state Greater than threshold quantity, then answer is "yes" and method 3700 proceeds to 3714.Otherwise, answer is "No" and method 3700 carries out To 3712.

3714, method 3700 runs engine machine and DISG to provide the amount for the drive train torque for wishing you.By starting Machine machine and the friction torque of each offer of DISG can change according to operating condition.For example, if battery charge state is low, larger portion The drive train torque divided can be by engine rather than DISG is provided.It can basis by the amount of torque that engine is supplied to power train United States Patent (USP) No.7, the estimation of method disclosed in 006,121, for all intention and purpose, it is fully incorporated in by reference This.It can be estimated from the empirically determined table indexed by DISG electric current and speed by the amount of torque that DISG is supplied to power train Meter.After torque is supplied to power train by engine and DISG, method 3700, which proceeds to, to be exited.

3712, method 3700 runs engine without running DISG, to provide desired torque to power train.Moreover, In some instances, DISG can be converted to battery charging mode, in mechanical energy of the battery charging mode from engine It is transformed into electric energy by DISG and is stored in energy accumulating device.In one example, engine air amount and hair are adjusted Motivation fuel quantity, to provide desired drive train torque amount.For example, if it is desired to drive train torque amount increase, then be supplied to The amount of the fuel and air of engine cylinder also increases.Engine operation be adjusted to provide desired torque to power train it Afterwards, method 3700, which proceeds to, exits.

3716, method 3700 judges whether engine runs and combustion air-fuel mixes in engine cylinder Object.In one example, when the motor torque increase that can be proved by increased engine speed, engine can be determined In combustion air-fuel mixture.If method 3700 judges engine in combustion air-fuel mixture, answer is "Yes" and method 3700 proceeds to 3730.Otherwise, answer is "No" and method 3700 proceeds to 3718.

3718, method 3700 judges whether battery charge state is greater than threshold quantity.In one example, battery electricity Pressure is the bias for estimating battery charge state.If method 3700 judges that battery charge state is greater than threshold quantity, Answer is "yes" and method 3700 proceeds to 3724.Otherwise, answer is "No" and method 3700 proceeds to 3720.

3724, method 3700 provides desired drive train torque without the torque from engine by DISG.It mentions The electric current for supplying DISG is based on table stored in memory, which exports according to desired DISG torque and DISG temperature The DISG magnitude of current.Value in table can be empirically determined.Method 3700 proceeds to after DISG torque is supplied to power train It exits.

3720, method 3700 rotates and starts engine.Engine can via except DISG starter or by DISG starting.If engine is rotated by DISG, power train disconnect-type clutch closure from DISG to engine transmitting to turn Square.Engine starts the rear of velocity of rotation and to engine cylinder supplies fuel and spark and start by reaching in engine.It is right It can change in different operating condition engine start velocities of rotation.For example, if engine is rotated by the starter except DISG, Then start the speed that velocity of rotation is less than 250RPM.But if engine is rotated by DISG, it is small for starting velocity of rotation In the speed of 1200RPM.Method 3700 proceeds to 3722 after engine start rotates and starts.

3722, method 3700 starts at least part torque to be supplied to wheel and start to charge the battery to increase Add battery charge state.When engine for vehicle provide torque and to charge the battery when power train disconnect-type clutch close It closes.Moreover, adjusting motor torque output to provide desired drive train torque amount.Motor torque output can pass through adjusting Cylinder air amount and cylinder fuel amount increase or decrease.The output of at least part engine is supplied to method 3700 after wheel Proceed to and exits.

3730, whether the choice situation that the judgement of method 3700 enters sail mode occurs.In one example, when starting Machine temperature can enter sail mode when being greater than threshold temperature.Furthermore, it is possible to assess the torque of such as engine speed and requirement Operating condition with determine whether enter sail mode.In addition, in some instances, when battery charge state is less than threshold value electricity Sail mode can be entered when lotus state.

For example, when catalyst temperature be lower than threshold value when or other situations can also enter sail mode.Controller can select It selects and engine is maintained at idling speed rather than closes engine, because if start under cold catalyst behavior can for engine It can increase emission.If battery SOC high and/or current point of operation will be required so that engine is transported in low fuel efficiency point Row, then controller, which can choose, is maintained at idling speed for engine rather than is closed power train disconnect-type clutch and runs Engine is to generate torque.

Sail mode can also be entered when fuel vapour filter tank is required and rinsed.Because fuel vapour flushing is to be scheduled for , controller, which can choose, to be maintained at idling speed for engine rather than closes engine.If battery SOC high and/or Current point of operation will be required so that engine is run in low fuel efficiency point, then controller, which can choose, is maintained at engine Idling speed rather than closure and runs engine to generate torque at power train disconnect-type clutch.

Sail mode can be entered when it is desirable that increasing brake boost vacuum.Because what vacuum was desirable to, controller can be with Engine is maintained at idling speed rather than closes engine by selection, and runs engine to provide vacuum.

Sail mode can be entered when engine coolant temperature (ECT) is low.Because ECT is low, controller be can choose Engine is maintained at idling speed rather than closes engine.

When wish responsive movement driver's mode comparatively fast step on accelerator pedal when can enter sail mode.Because this is driven The mode of sailing has determined or has been selected as motor pattern, controller can choose engine is maintained at idling speed rather than Close engine.In engine to navigate by water idling rather than in the case where engine stop, accelerator pedal is stepped on to driver Response will be than very fast.

If method 377 judges that the situation of selection occurs to allow access into sail mode, answer is "yes" and method 3700 proceed to 3732.Otherwise, answer is "No" and method 3700 proceeds to 3718.

3732, method 3700 opens power train disconnect-type clutch.Therefore power train disconnect-type clutch is opened not There is provided by any torque that engine generates include to keep the power train of DISG, fluid torque-converter and speed changer part.It beats If opening power train disconnect-type clutch to enable the engine to be connected to DISG, fluid torque-converter and speed changer than engine It can more effectively operating status run, because engine can be run with lesser torque reserve.In one example, it sends out Motivation torque reserve can be characterized as the engine when engine is arrived with air capacity without providing all available at a given speed From the available amount of torque of engine when being run in the case where amount of torque.

For example, engine is with 1200RPM and can produce 100N-m's when prespecified cylinder air amount operation Torque.But obtainable motor torque amount can be at 1200RPM when engine introduces predetermined cylinder air amount 125N-m.The difference of 25N-m can be explained with engine with running from the spark timing of MBT spark timing retard.25N-m is indicated It can keep to compensate the torque reserve for the torque interference that may be supplied to engine.But 25N-m is also illustrated that since spark prolongs The loss of engine efficiency caused by late.When power train disconnect-type clutch is opened, engine can use lesser torque reserve Operation, because lesser torque interference can be supplied to engine via power train.It is opened in power train disconnect-type clutch Method 3700 proceeds to 3734 afterwards.

3734, whether method 3700 judges desired drive train torque in the threshold range of DISG torque threshold. DISG torque threshold can indicate the maximum amount of torque that can be obtained from DISG or turn less than obtainable DISG torque total amount Square amount.If method 3700 judges desired drive train torque in the threshold range of DISG torque threshold, answer is "yes" And method 3700 proceeds to 3736.Otherwise, answer is "No" and method 3700 proceeds to 3738.

3736, method 3700 is to navigate by water idling speed operation engine and adjust engine spark timing and valve just When, to improve engine efficiency and fuel economy.It is desired in the open mode at power train disconnect-type clutch to start Machine torque is provided by DISG.Idling speed is navigated by water when engine is connected to DISG and speed changer can turn lower than basic idling Speed.Moreover, engine with navigate by water idling speed operation when, with when engine with base idle revolving speed operation when compared with spark just When can shift to an earlier date.When desired drive train torque is low and when engine is connected via the power train disconnect-type clutch of closure Base idle revolving speed can be applied when the rest part of power train.Adjustable engine valve timing is so as to improved appearance Product efficiency runs engine.In one example, adjustable valve timing makes inlet valve timing closure delay, in cylinder Increase motor intake manifold pressure when air inlet is relatively low.In 3736 progress of method 3700 after engine enters sail mode To exiting.

It whether there is the starter except DISG in 3738,3700 judgement system of method.In one example, if Starter except DISG is deteriorated, and method 3700 may determine that there is no the starters except DISG.When there are bits for starter 3700 also may determine that there are the starters except DISG when being arranged in memory.If method 3700 judgement there are DISG it Outer starter, then answer is "yes" and method 3700 proceeds to 3740.Otherwise, answer is "No" and method 3700 carries out To 3740.

3740, method 3700 stops engine rotation and provides desired drive train torque by DISG.By stopping Only stop engine rotation to the fuel stream of engine cylinder and spark.It therefore can be saved in 3740 stopping engines additional Fuel stream and because engine can postpone without the torque from DISG.In this way, biggish DISG amount of torque It can be supplied to power train, because a part of available DISG torque need not be kept in the form of deposit to restart hair Motivation.Method 3700, which proceeds to, after stopping engine exiting.

3742, method 3700 judge DISG output torque whether in engine start rotational torque (for example, from zero velocity Rotate engine to be less than 250RPM starting velocity of rotation amount of torque) threshold range in.For example, if engine start Rotational torque is 40N-m and threshold range is 5N-m, then when DISG output torque is 35.5N-m, DISG turns in engine start In the threshold range of dynamic torque.If method 3700 judges DISG output torque in the threshold torque of engine start rotational torque In range, then answer is "yes" and method 3700 proceeds to 3744.Otherwise, answer is "No" and method 3700 proceeds to 3746。

3746, method 3700 stops engine start rotation and provides desired drive train torque via DISG.Hair Motivation stops also reducing fuel consumption.Since DISG has enough available amount of torque, engine can stop.If In engine stop, desired drive train torque increases, then does not have enough torque output capacity to start engine in DISG And before providing desired rotation system torque, engine can be restarted via DISG.But in some instances, if Battery charge state less than threshold value and the additional vacuum of vehicle needs, fuel vapour rinse, higher catalyst temperature or Higher engine temperature, then engine can continue with the idle running of sail mode idling speed.Method after the engine is stopped 3700 proceed to and exit.

3744, as described in 3736, method 3700 is to adjust spark to navigate by water idling speed operation engine Timing, valve timing, and drive train torque is provided via DIS.Method 3700 carries out after engine enters sail mode To exiting.

It should be pointed out that when driver reduces driver requested torque (for example, loose accelerator pedal or reduction accelerator are defeated Enter) when, power train can be run described in the method according to Figure 37.When driver requested torque is greater than DISG threshold torque, Torque can be supplied to the power train for being connected to wheel from engine.Engine speed can reduce sail mode idling speed And it responds the driver requested torque reasonable match of reduction to separate.DISG can enter for battery provide charging with The regeneration mode of the constant rate of deceleration of vehicle.In an example in this, DISG threshold torque is greater than specified DISG torque 75%.

It should be pointed out that when driver increase driver requested torque (for example, step on accelerator pedal or increase accelerator it is defeated Enter) when, power train can be run described in the method according to Figure 37.Engine, which can respond, increases driver requested torque from boat Row idling speed accelerates to DISG speed.Response engine speed, which reaches DISG speed transmission system disconnect-type clutch, to be closed It closes.

It should be pointed out that when driver increases driver requested torque (for example, stepping on accelerator pedal during vehicle startup Or increase accelerator input) when, power train can be run described in the method according to Figure 37.Response increase is driver requested to start DISG torque is supplied to vehicle transmission system when machine does not rotate.Driver requested torque is responded in engine start rotational torque In threshold range (for example, wherein DISG torque is greater than the 75% of engine start rotational torque), engine can restart simultaneously And with the idle running of sail mode idling speed without providing motor torque to power train.Engine can be added with speed control mode Speed to basic matching DISG speed (for example, ± 50RPM), and when engine speed match substantially DISG speed (for example, ± Power train disconnect-type clutch can be closed when 50RPM).In some instances, when desired torque is rotated in engine start It is sent out when (for example, torque between 75% specified DISG torque and specified DISG torque) between torque and threshold value DISG torque Motivation speed can follow DISG speed.

Moreover, in 3736 and 3734, when desired torque is within the scope of the pre-determined torque of DISG threshold torque, engine It can be run with speed control mode to follow DISG speed.By following DISG speed, power train disconnect-type clutch can be with It is closed as early as possible to improve power train response.

In this way, the method for Figure 37 provides efficient engine operation mode, runs with base idle revolving speed Engine is consumed compared to that can reduce engine fuel.Moreover, the method offer of Figure 37 stops when that can save additional fuel Only engine.In addition, this method also keeps drive train torque to respond even if engine more efficiently can run or stop.

The method for showing the sail mode for exiting power train operation referring now to Figure 38, Figure 38.The method of Figure 38 is made It can store in the non-transient memory of the controller 12 of Fig. 1-3 for executable instruction.

3802, method 3800 determines operating condition.Operating condition can include but is not limited to drive train torque demand, power train separation Formula clutch state, engine speed, car speed, DISG torque and battery charge state.After operating condition is determined Method 3800 proceeds to 3804.

3804, whether method 3800 judges the engine in sail mode to navigate by water idling speed operation and power train point Whether opened from formula clutch.Engine operation mode and power train disconnect-type clutch operating status can be by being inquired One or more bits or mark stored in memory determine.If method 3800 judges engine not in navigation mould Formula, then answering is "No" and method 3800 proceeds to and exits, if method 3800 judges engine in sail mode and passes Dynamic is that disconnect-type clutch is open, then answer is "yes" and method 3800 proceeds to 3806.

, 3806, method 3800 judges whether desired drive train torque is greater than DISG threshold torque.DISG threshold torque Available DISG amount of torque can be equal to or less than.If method 3800 judges that desired drive train torque is greater than DISG threshold value Torque, then answer is "yes" and method 3800 proceeds to 3808.Otherwise, answer is "No" and method 3800 proceeds to and moves back Out.

3808, method 3800 is by increasing engine air amount and engine fuel amount (for example, being supplied to engine vapour The air and fuel quantity of cylinder) by engine speed from navigation idling speed increase to the speed synchronous with DISG.Moreover, when starting Spark timing can be from MBT spark timing retard when machine air capacity and engine fuel amount increase.In engine air amount and hair Motivation fuel quantity increase so that motor torque increase and engine made to accelerate to the speed of DISG after method 3800 into It goes to 3810.

3810, method 3800 increases torque converter clutch (TCC) sliding.Torque converter clutch sliding can be with Increased by reducing torque converter clutch application of force.By increasing TCC slip, it is possible to reduce drive train torque interference. Method 3800 proceeds to 3812 after increasing TCC slip.

3812, method 3800 is closed power train disconnect-type clutch.When engine speed reaches DISG speed and After engine speed has been adjusted to DISG speed a predetermined time segment, power train disconnect-type clutch can be closed. Method 3800 proceeds to 3814 after being closed power train disconnect-type clutch.

3814, method 3800 increases motor torque by increasing engine air and fuel quantity.Furthermore, it is possible to increase DISG torque can provide desired drive train torque to increase motor torque.Adjusting motor torque and DISG Torque, which is proceeded to provide method 3800 after desired drive train torque, to be exited.

In this way, the method response of Figure 38 steps on accelerator pedal (for example, depressing accelerator pedal to higher torque Demand) change and leaves sail mode, wherein DISG provides torque and the race of engine for wheel.For example, driver steps on acceleration Device pedal and new torque-demand are increased rapidly on the total torque capacity of DISG.Engine with speed control mode towards DISG speed accelerates, and TCC can open that torque increase and power train are isolated and power train disconnect-type clutch can be with to allow Closure is so that engine accelerates to very fast speed.After engine basically reaches DISG speed (for example, ± 100RPM) Engine transitions are to torque control model.Thereafter engine and DISG can provide desired torque.

It shows referring now to Figure 39, Figure 39 for running the power train including sail mode according to the method for Figure 37 and Figure 38 Exemplary timing.The timing of Figure 39 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 39 indicates the graph of relation of car speed and time.Y-axis indicates car speed And car speed increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases along the direction of X-axis arrow.

The second figure from the top of Figure 39 indicates the graph of relation of desired drive train torque and time.Desired biography Dynamic is that torque can be on wheel, on face of fluid torque converter, on transformer turbine or power train disconnect-type clutch On torque.Y-axis indicates desired drive train torque and desired drive train torque increases along the direction of Y-axis arrow.X-axis It indicates the time and the time increases along the direction of X-axis arrow.Horizontal line 3902 indicates that DISG has the ability to be supplied to power train The threshold value (for example, torque within the scope of the pre-determined torque of specified or maximum DISG torque) of drive train torque.

Third figure from the top of Figure 39 indicates the graph of relation of power train disconnect-type clutch state and time.Y Axis indicates power train disconnect-type clutch state and when power train disconnect-type clutch state trace is in close to Y-axis arrow Power train disconnect-type clutch is closed when higher level.When power train disconnect-type clutch state trace be in close to X-axis compared with Power train disconnect-type clutch is open when low level.X-axis indicates the time and the time increases along the direction of X-axis arrow Add.

The 4th figure from the top of Figure 39 indicates the graph of relation of engine condition and time.Y-axis indicates engine State and the engine rotation when engine condition trace is in close to the higher level of Y-axis arrow.When engine condition mark Engine does not rotate when line is in close to the reduced levels of X-axis.X-axis indicates the time and the time increases along the direction of X-axis arrow Add.

The 5th figure from the top of Figure 39 is the relationship of energy accumulating device or battery charge state (SOC) and time Curve graph.Y-axis indicates battery SOC and battery SOC increases along the direction of Y-axis arrow.X-axis indicates time and time Increase along the direction of X-axis arrow.Horizontal line 3906 indicates the threshold quantity of desired battery charge.The quantity of electric charge higher than 3906 Can be it is desired, with reduce battery be deteriorated a possibility that.

In time T₈₅, car speed zero, engine stop, power train disconnect-type clutch opening, battery charge shape State is in the horizontal medium level being greater than 3906.When vehicle stops or stops at traffic signals, these situations be can be Regenerative situation.

In time T₈₆, what response was such as determined from accelerator pedal (not shown) increases driver requested torque, increases uncommon The drive train torque of prestige.Engine is maintained at closed state and power train disconnect-type clutch remains closed.It is started when combining Car speed starts to increase when power train (DISG) (not shown) of machine and/or generator starts to provide positive torque to vehicle transmission system Add.When battery charge is used to push vehicle, battery SOC is begun to decline.

In time T₈₆With time T₈₇Between, respond driver requested torque, it is desirable to drive train torque be more than torque water Flat 3904.As a result, engine rotates and starts；But power train disconnect-type clutch stays open.Engine can be via Starter starting except DISG.Car speed continues growing and battery SOC continues to decline.

In time T₈₇, respond driver requested torque, it is desirable to drive train torque be more than level of torque 3902.It is very short After time, response drive train torque is closed more than 3902 power train disconnect-type clutch of level of torque.By being closed power train Disconnect-type clutch, drive train torque can be increased by increasing motor torque.Being closed power train disconnect-type clutch will Engine is connected to DISG and remaining power train.Engine remain operational and motor torque increase, therefore, it is desirable to turn Square is provided by DISG and engine.When DISG provides torque to power train, battery SOC continues to reduce.

In time T₈₈, horizontal driver input of the response lower than threshold torque level 3902, it is desirable to drive train torque Reduce, but it is maintained on threshold torque level 3904.The desired drive train torque reduced is responded, motor torque subtracts It is small.In addition, power train disconnect-type clutch is opened so that engine is separated with DISG and power train.Engine still combustion air And fuel.Engine speed can reduce navigation idling speed, and navigation idling speed is lower than when engine is connected to DISG The basic idling speed of engine rotation.In addition, engine spark timing can shift to an earlier date.Reduced engine speed and in advance Spark timing can reduce fuel consumption.

In time T₈₉, it is desirable to drive train torque be increased above the level of threshold torque 3902 for the second time by driver. Drive train torque is responded to be closed more than 3902 power train disconnect-type clutch of torque threshold.Then motor torque increases and wishes The drive train torque of prestige is provided via engine.DISG enters generator mode and battery charge state is sent out via a part Motivation torque increases.When motor torque increases to car speed when being supplied to power train.

In time T₉₀, respond the reduction of drive train torque desired by the driver requested torque of reduction.Desired power train Torque is decreased below the torque of threshold torque 3904.Therefore, respond the drive train torque of low requirement, power train separate type from Clutch is opened and engine rotation is stopped.In this way it is possible to reduce fuel consumption in vehicles.DISG rests on generator Mode and the when the vehicle is decelerating charging of increase battery.

In time T₉₁, respond the increase of drive train torque desired by driver requested torque.Desired drive train torque increases The level being added between torque threshold 3902 and torque threshold 3904.As it is desirable that drive train torque close to threshold torque 3902, engine rotates and starts, so if desired drive train torque further increases, motor torque can be to subtract Few time obtains.Increased by providing torque vehicle speed to DISG.The electric power storage when DISG provides torque to vehicle transmission system Pond state of charge starts to reduce.

In time T₉₂, respond and increase the increase of drive train torque desired by driver requested torque.Desired power train turns Square is increased above the level of threshold torque 3902.After the very short time, power train disconnect-type clutch is closed and is started Machine torque is supplied to power train.In this way, drive train torque can be easy to increase and reach without waiting for engine speed Torque can be supplied to the level of power train.DISG is also converted to generator mode and battery SOC increases.

In time T₉₃, the horizontal driver that response is lower than threshold torque level 3902, which inputs, reduces desired power train turn Square, but it is maintained on threshold torque level 3904.The desired drive train torque reduced is responded, motor torque subtracts It is small.Moreover, power train disconnect-type clutch is opened so that engine and DISG and power train are disconnected.Engine still combustion air And fuel.Engine speed can reduce navigation idling speed.Torque can export just via being converted to vehicle transmission system The DISG of the torque control model of torque is supplied to power train.

In time T₉₄, when DISG continues to consume charge, battery SOC is reduced to 3906 level.Respond battery SOC Generator mode power train disconnect-type clutch closure is converted to DISG.Engine provides torque to power train and DISG.Cause This, responding desired drive train torque and battery SOC power train disconnect-type clutch can open and close.In T₉₄Later very The short time, it is desirable to drive train torque be increased above the level of torque threshold 3902.Due to power train disconnect-type clutch Closed, it is maintained at the closed state.

In time T₉₅, respond the driver requested torque of reduction, it is desirable to drive train torque reduce.Desired power train Torque is decreased below the torque of threshold torque 3904.Therefore, respond low desired drive train torque, power train separate type from Clutch can be opened and engine rotation is stopped.DISG rests on generator mode and increases electric power storage when the vehicle is decelerating Pond charging.

The example that the power train including sail mode is run according to the method for Figure 37 and 38 is shown referring now to Figure 40, Figure 40 Property timing.The timing of Figure 40 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 40 indicates the graph of relation of power train disconnect-type clutch state and time.Y Axis indicates power train disconnect-type clutch state, and when power train disconnect-type clutch state trace is in higher Y-axis arrow Power train disconnect-type clutch is closed when the higher level of head.X-axis indicates the right side of time and time from the left lateral view of figure Increase.

The second figure from the top of Figure 40 indicates the graph of relation of engine speed and time.Y-axis indicates engine Speed and engine speed increase along the direction of Y-axis arrow.X-axis indicates the right side of time and time from the left lateral view of figure Side increases.Horizontal line 4002 indicates the basic engine when engine is connected to DISG via power train disconnect-type clutch Idling speed.Horizontal line 4004 indicates when engine combustion air and fuel but is not attached to the basic engine of DISG Sail mode idling speed.

Third figure from the top of Figure 40 indicates the graph of relation of DISG torque and time.Y-axis indicates DISG torque And DISG torque increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases from the right side of the left lateral view of figure Add.Horizontal line 4006 indicates that DISG is capable of providing and gives the amount of the torque of power train (for example, specified DISG torque).Horizontal line 4008 indicate that DISG is capable of providing to the amount of the torque of power train when that can start rotation engine from zero velocity.

The 4th figure from the top of Figure 40 indicates the graph of relation of desired drive train torque and time.Y-axis indicates Wish drive train torque and it is desirable that drive train torque increases along the direction of Y-axis arrow.In one example, it is desirable to transmission It is torque based on the driver requested torque such as determined from accelerator pedal.X-axis indicates time and time from the left side of figure Increase to the right side of figure.

The 5th figure from the top of Figure 40 indicate low power starting machine (such as with the starting power lower than DISG Motivation) operating status.Y-axis indicates the operating status of low power starting machine, and works as the operating status mark of low power starting machine Low power starting machine is rotating when line is close to Y-axis arrow.X-axis indicates the time and the time increases from the right side of the left lateral view of figure Add.

In time T₉₆, power train disconnect-type clutch is closed and engine speed is in raised level.Engine is to biography Dynamic system provides positive torque.DISG torque, which is in, indicates that engine provides the low-level of most of torque to power train.Moreover, low appearance Amount starter is not run.

In time T₉₆With time T₉₇Between, it responds desired drive train torque and reduces power train disconnect-type clutch opening And engine stop.It responds driver requested torque and reduces the reduction of (not shown) drive train torque.Low capacity starter is protected It holds shutdown and DISG torque is maintained at lower level.

In time T₉₇, respond the low state (not shown) power train disconnect-type clutch that battery charges and be partly closed. DISG torque response closure power train disconnect-type clutch increases briefly.DISG provides additional torque for opening to power train Dynamic engine.Herein after the very short time, by providing fuel and spark starting engine to engine.In engine start DISG torque later reduces and DISG torque returns to negative torque when DISG enters generator mode to charge a battery. Via power train disconnect-type clutch and the DISG when DISG torque is lower than threshold value 4008, engine does not have to low capacity starter And start rotation.

In time T₉₇With time T₉₈Between, engine and DISG charge a battery.The engine after battery charging Stop and DISG starts to provide to power train positive torque.Power train disconnect-type clutch is also opened when an engine is stopped.It rings Answering increased driver requested torque, drive train torque desired by very short time increases after the engine is stopped.But Desired drive train torque is not in the threshold range of level of torque 4006, therefore engine does not start.

In time T₉₈, it is desirable to drive train torque increase in the threshold range of the torque of level of torque 4006.Response The increase of desired drive train torque, low capacity starter are engaged and rotate engine.The very short time is when fire behind Engine start when colored and fuel supply engine.Start since DISG is capable of providing desired drive train torque without coming from The assistance of machine, therefore power train disconnect-type clutch is maintained at opening state.Engine is to navigate by water idling speed operation, it is contemplated that Increased desired drive train torque.

In time T₉₉, respond drive train torque desired by the driver requested torque (not shown) of reduction and be decreased below The level of threshold level 4008.It responds low desired drive train torque and low capacity starter to remain turned-off, engine stop. Power train disconnect-type clutch is also maintained at opening state.

In time T₉₉With time T₁₀₀Between, it responds drive train torque desired by increased driver requested torque and increases. Desired drive train torque increases to the level lower than the threshold level far from level of torque 4006.Therefore, DISG provides hope Drive train torque without start engine.Power train disconnect-type clutch is maintained at opening state.

In time T₁₀₀, respond drive train torque desired by increased driver requested torque and further increase.Response is uncommon The drive train torque of prestige increases in the range of the threshold level of level of torque 4006, and low capacity starter is engaged and rotated Engine.The rotation of response engine to engine offer spark and engine fuel by being activated.Engine is accelerated to boat Row mode idling speed 4004.DISG continues as power train and provides whole positive torques to meet desired drive train torque.Hair Very short time low capacity starter is disengaged after motivation starting.

In time T₁₀₁, respond increased driver requested torque, it is desirable to drive train torque increase to greater than torque water Flat 4006 level.The driver requested torque transmission system disconnect-type clutch of response increase is closed and engine speed Increase, therefore engine can provide additional torque to increase DISG torque.Low capacity starter is still closed.

In this way it is possible to starter, engine and disconnect-type clutch be run, to provide pass desired to increase Dynamic is the shorter response time of torque.Moreover, lacking capacity in DISG can transport during starting the situation of rotation engine Row low capacity starter, therefore DISG range of operation can be extended.

Therefore, the method for Fig. 1-3 and Figure 37-40 provides the method for power train operation, comprising: responds desired torque Greater than power train integrated actuating machine/generator threshold torque, runs engine and the hair for pushing vehicle is provided to power train Motivation torque；It is less than threshold value drive train torque and greater than threshold engine starting rotational torque, fortune with desired torque is responded Row engine and not to power train provide motor torque.In this way, power train can be in the case where improving efficiency It runs and the shorter torque response time is provided.

In some instances, it is in transmission assembly that this method, which includes power train integrated actuating machine/generator threshold torque, At the torque within the scope of the pre-determined torque of the nominal torque of starter/generator.This method includes that threshold engine starts rotation Torque is in the scheduled torque range of engine start rotational torque.This method includes that engine start rotational torque is from general Engine turns to the torque of the speed less than 250RPM from zero.This method further includes in operation engine without mentioning to power train Power train disconnect-type clutch is run with opening state while for motor torque.This method further includes that desired torque is based on Driver requested torque.This method further include run engine without to power train provide motor torque while via Power train integrated actuating machine/generator provides torque to the power train.

The method of Fig. 1-3 and Figure 37-40 also provides the method for power train operation, comprising: it is big to respond desired torque Starting for propulsion vehicle is provided in power train integrated actuating machine/generator threshold torque, rotary engine and to power train Machine torque；Desired torque is responded to be less than threshold value drive train torque and be greater than threshold engine starting rotational torque, rotation hair Motivation and not to power train provide motor torque；It is less than threshold engine starting rotational torque not with desired torque is responded Rotate engine.This method further includes responding battery charge when desired torque is less than when threshold engine starts rotational torque State rotates and runs engine.

In one example, this method further includes responding desired torque to be greater than power train integrated actuating machine/generator Threshold torque rotates engine from halted state.This method includes that power train integrated actuating machine/generator threshold torque is less than The pre-determined torque of nominal torque far from power train integrated actuating machine/generator.This method includes working as to power train to provide promotion Power train disconnect-type clutch is in closed state when the motor torque of vehicle.This method includes that ought not provide to push away to power train Power train disconnect-type clutch is in opening state when the motor torque of motor-car.This method includes power train integrated actuating Machine/generator threshold torque changes with vehicle working condition.

The method of Fig. 1-3 and Figure 37-40 also provides a kind of Vehicular system, comprising: engine；Including being connected mechanically to this The double mass flywheel of first side of engine；It mechanically include the transmission for being connected to first side of second side of the double mass flywheel It is disconnect-type clutch；Power train integrated actuating including being connected to first side of second side of the power train disconnect-type clutch Machine/generator (DISG)；The speed changer of the engine is selectively connected to via the power train disconnect-type clutch；And control Device processed, the controller include the executable instruction being stored in non-transient memory, so as in the power train disconnect-type clutch Place is in the open mode with the first idling speed tickover, and executable instruction is so as in the power train separate type clutch With the second idling speed tickover when device is in closed state, which is greater than the first idling speed.

In one example, which further includes additional executable instruction, for responding desired power train Torque opens and closes the power train disconnect-type clutch.The Vehicular system further includes additional executable instruction, with response The timing of engine early spark is run with the first idling speed and reduces engine air amount.The Vehicular system further includes additional Executable instruction, spark timing and engine air amount delay fire when with relative to the first idling speed operation engine Flower timing simultaneously increases engine air amount.The Vehicular system further includes additional executable instruction, to respond desired torque Greater than power train integrated actuating machine/generator threshold torque, motor torque is provided to speed changer.The Vehicular system further includes Additional executable instruction is less than power train integrated actuating machine/generator threshold torque to change to respond desired torque Fast device provides motor torque.

The method of Fig. 1-3 and Figure 37-40 also provides the method for power train operation, comprising: with scheduled navigation idling Revolving speed runs engine, which is less than basic engine idle rotational；With in engine with scheduled navigation Idling speed opens the power train disconnect-type clutch when running, so that engine is disengaged with wheel.This method includes working as When desired drive train torque is in power train integrated actuating machine/generator (DISG) threshold torque threshold range, and work as DISG provides torque to wheel, runs engine with scheduled navigation idling speed, and in scheduled navigation at engine Vehicle is moving when idling speed.This method includes the torque capacity capacity that DISG threshold torque is DISG.

In some instances, it is than more shifting to an earlier date under basic engine idle rotational that this method, which further includes spark timing, Spark timing.This method further includes responding desired torque to exit navigation idling speed more than threshold value.This method further includes ringing Answering desired torque is more than that threshold value is closed the power train disconnect-type clutch.This method includes that the power train disconnect-type clutch exists It is arranged in power train between engine and power train integrated actuating machine/generator.

The method of Fig. 1-3 and Figure 37-40 also provides the method for power train operation, comprising: response power train integrates Motivation/generator (DISG) lacks the operating status of the torque from static starting engine, with scheduled navigation idling speed fortune Row engine, the navigation idling speed are less than basic engine idle；With in the engine with scheduled navigation idling Power train disconnect-type clutch is opened when revolving speed is run, so that engine is disengaged with wheel.This method further includes in the hair Motivation is to provide desired drive train torque to wheel by DISG when the operation of scheduled navigation idling speed.

In one example, this method further includes that response torque-demand is exited greater than threshold value with scheduled navigation idling speed Run engine.This method includes that engine is separated with DISG.This method further include the closure power train disconnect-type clutch it The preceding speed that engine is accelerated to DISG.This method, which is included in when engine is run with scheduled navigation idling speed, to be supplied to The spark of engine is than when engine when basic idling speed operation more to shift to an earlier date.

The method of Fig. 1-3 and Figure 37-40 also provides a kind of Vehicular system, comprising: engine；Including being connected mechanically to this The double mass flywheel (DMF) of first side of engine；It mechanically include the first side for being connected to second side of the double mass flywheel Power train disconnect-type clutch；Transmission assembly including being connected to first side of second side of the power train disconnect-type clutch At starter/generator (DISG)；The speed changer of the engine is selectively connected to via the power train disconnect-type clutch； And controller, the controller include executable non-transient instruction, enter sail mode to respond desired torque.

In one example, which further includes additional instruction, to respond desired torque output in DISG Enter sail mode in the range of the threshold torque of torque capacity.The Vehicular system further includes additional instruction, can be obtained with response To DISG torque be not enough to start engine and enter sail mode.The Vehicular system further includes additional instruction, with response Desired torque is greater than threshold value and exits sail mode.The Vehicular system further includes additional instruction, exits navigation mould with response Formula increases engine speed.The Vehicular system further includes additional instruction, when engine speed substantially in DISG speed when be closed Power train disconnect-type clutch.

The method of Fig. 1-3 and Figure 37-40 also provides the method for power train operation, comprising: from engine to being connected to The power train of wheel provides torque；Make to start with the driver requested torque that idling speed runs engine and responds reduction Machine is separated with power train；Accelerate rate with constant vehicle is provided during the driver requested torque in reduction.With this side Formula, when providing power train and braking and improve torque response, power train can save fuel.

In some instances, this method further include the driver requested torque that reduces of response open power train separate type from Clutch.This method includes that power train integrated actuating machine/generator provides negative torque to provide constant vehicle deceleration rate.The party Method includes that the idling speed is the first idling speed, and the first idling speed is lower than the second idling speed, when engine connects Engine is run when power train with the second idling speed.This method includes that the driver requested torque of response reduction is less than biography Dynamic assembly runs engine at starter/generator threshold torque with idling speed.This method include power train integrated actuating machine/ The threshold torque of generator is greater than the 75% of specified power train integrated actuating machine/generator torque.This method includes from starting The torque that machine provides is positive torque.

The method of Fig. 1-3 and Figure 37-40 also provides the method for power train operation, comprising: from engine to being connected to The power train of wheel provides torque；Make to start with the driver requested torque that idling speed runs engine and responds reduction Machine is separated with power train；Constant vehicle deceleration rate is provided under the driver requested torque of reduction；And with idling Increase driver requested torque is responded after revolving speed operation engine, and vehicle is accelerated into a speed.This method includes the speed It is power train integrated actuating machine/generator speed.

In some instances, this method further includes responding the speed to reach power train integrated actuating machine/generator speed It is closed power train disconnect-type clutch.This method includes that constant vehicle deceleration is mentioned by power train integrated actuating machine/generator For.This method includes power train integrated actuating machine/generator with the regeneration mode operation to charge a battery.This method includes should Idling speed is the first idling speed, and wherein first idling speed is lower than the second idling speed, when engine is connected to Engine is run when power train with the second idling speed.This method includes that the driver requested torque of response reduction is less than transmission Assembly runs engine at the threshold torque of starter/generator with idling speed.

The method of Fig. 1-3 and Figure 37-40 also provides a kind of Vehicular system, comprising: engine；Including being connected mechanically to this The double mass flywheel (DMF) of first side of engine；It mechanically include the first side for being connected to second side of the double mass flywheel Power train disconnect-type clutch；Transmission assembly including being connected to first side of second side of the power train disconnect-type clutch At starter/generator (DISG)；The speed changer of the engine is selectively connected to via the power train disconnect-type clutch； And controller, which includes executable non-transient instruction, so as to sail mode idling speed tickover Constant vehicle deceleration rate is provided simultaneously.

In one example, which includes the speed that the sail mode idling speed is less than base idle revolving speed Degree, the base idle revolving speed is provided when engine is connected to DISG.The Vehicular system further includes additional instruction, is subtracted with response Power train disconnect-type clutch is opened in few driver requested torque.The Vehicular system further includes additional instruction, is increased with responding Sail mode idling speed is exited in the driver requested torque added.The Vehicular system further includes additional instruction, is increased with responding The driver requested torque added increases engine speed from sail mode idling speed.The Vehicular system includes the constant vehicle Rate of deceleration is provided by DISG.

The method of Fig. 1-3 and Figure 37-40 also provides the method for power train operation, comprising: responds desired torque warp Torque is provided from power train integrated actuating machine/generator to power train；Driver requested torque is in engine start with response Start engine in the threshold range of rotational torque and the engine that dallies is without providing motor torque to power train.With this Kind mode, the desired drive train torque of different level can be the basis for entering or exiting sail mode.This method packet Include the threshold range is greater than engine start rotational torque 75%.This method includes that DISG torque is supplied to fluid torque-converter.It should Method includes that engine starts via power train integrated actuating machine/generator.This method includes the power train when tickover Disconnect-type clutch is in the open state.This method includes desired torque based on driver requested torque.This method includes Engine start rotational torque is the amount that engine is accelerated to the torque of the speed less than 250RPM from zero velocity.

The method of Fig. 1-3 and Figure 37-40 also provides the method for power train operation, comprising: responds driver requested Torque provides torque to power train via power train integrated actuating machine/generator；Driver requested torque is responded in engine It starts starting engine in the threshold range of rotational torque and the engine that dallies is without providing motor torque to power train； And the driver requested torque of response increases to power train integrated actuating machine/generator threshold torque and accelerates to engine Power train integrated actuating machine/alternator speed.This method further includes that response engine reaches power train integrated actuating machine/generator Speed is closed power train disconnect-type clutch.

In one example, this method further includes starting in the rear of closure power train disconnect-type clutch to power train offer Machine torque.This method includes starting engine via the starter except the power train integrated actuating machine/generator.This method packet It includes via the power train integrated actuating machine/generator starting engine.This method includes running to send out with sail mode idling speed Motivation.This method include engine with sail mode idling speed operation when to engine provide spark ratio when engine with Base idle revolving speed more shifts to an earlier date when running.

The method of Fig. 1-3 and Figure 37-40 also provides a kind of Vehicular system, comprising: engine；Including being connected mechanically to this The double mass flywheel of first side of engine；It mechanically include the transmission for being connected to first side of second side of the double mass flywheel It is disconnect-type clutch；Power train integrated actuating including being connected to first side of second side of the power train disconnect-type clutch Machine/generator (DISG)；The speed changer of the engine is selectively connected to via the power train disconnect-type clutch；And control Device processed, the controller include the executable instruction being stored in non-transient memory, to accelerate vehicle from zero velocity via DISG Without starting engine, and the controller includes executable instruction, is more than engine start to respond desired torque It rotates threshold torque and starts engine.

In one example, the Vehicular system further include additional instruction so as to navigate by water idling speed tickover and Motor torque is not provided to power train.The Vehicular system further includes additional instruction, with respond increased desired torque from Navigate by water idling speed acceleration motor.The Vehicular system further includes additional instruction, reaches DISG speed to respond engine speed Degree closure power train disconnect-type clutch.The Vehicular system further includes additional instruction, in closure power train separate type clutch Increase motor torque after device.The Vehicular system further includes that engine start rotational torque is to accelerate engine from zero velocity To the amount of the torque of the engine speed less than 250RPM.

The method of Fig. 1-3 and Figure 37-40 also provides the method for power train operation, comprising: integrates via power train Motivation/generator provides positive torque to power train；Engine is run under idling speed with speed control mode；And response is uncommon Engine is accelerated to power train integrated actuating machine/alternator speed with speed control molding by the torque of prestige.In this way, exist It can control fluid torque-converter torque during stepping on accelerator pedal situation.This method includes that desired torque is driver requested Torque, and beaten at the power train disconnect-type clutch being arranged between engine and power train integrated actuating machine/generator Open state.

In one example, this method further includes that response engine speed meets or exceeds power train integrated actuating machine/hair Motor speed is closed power train disconnect-type clutch.This method includes that the idling speed is sail mode idling speed.This method It is the speed lower than base engine idling speed including the sail mode idling speed.This method further includes in engine to navigate Row mode idling speed run when engine spark timing relative to base engine idling speed run engine when Engine spark timing shifts to an earlier date.This method further includes when engine is with the operation of sail mode idling speed relative to send out substantially Motivation idling speed runs engine and reduces engine air amount.

The method of Fig. 1-3 and Figure 37-40 also provides the method for power train operation, comprising: integrates via power train Motivation/generator provides positive torque to power train；Engine is run under idling speed with speed control mode；Desired by response Torque adjust torque converter clutch sliding and with speed control mode by engine accelerate to power train integrated actuating machine/ Alternator speed；And response engine speed matches power train integrated actuating machine/alternator speed closure power train point substantially From formula clutch.This method includes adjusting torque converter clutch sliding including increasing torque converter clutch sliding.It should Method further includes that response power train disconnect-type clutch is in closed state reduction torque converter clutch sliding.

In some instances, it is sail mode idling speed that this method, which includes the idling speed,.This method includes the navigation Mode idling speed is the speed lower than base engine idling speed.This method includes that the desired torque increases.This method Increase to including the desired torque greater than power train integrated actuating machine/generator threshold torque.

The method of Fig. 1-3 and Figure 37-40 also provides a kind of Vehicular system, comprising: engine；Including being connected mechanically to this The double mass flywheel of first side of engine；It mechanically include the transmission for being connected to first side of second side of the double mass flywheel It is disconnect-type clutch；Power train integrated actuating including being connected to first side of second side of the power train disconnect-type clutch Machine/generator (DISG)；The speed changer of the engine is selectively connected to via the power train disconnect-type clutch；And control Device processed, the controller include the executable instruction being stored in non-transient memory, are less than with the desired torque of response and are started Machine starts rotational torque and individually provides positive torque to speed changer via DISG, and including instruction, starts when DISG torque is greater than When machine starts rotational torque and is less than DISG torque, adjusts engine speed and follow DISG speed.

In one example, which further includes additional instruction, to be substantially equal to DISG speed when engine speed Power train disconnect-type clutch is closed when spending.The Vehicular system further includes additional instruction, with closure power train separate type from Engine is run with torque control model after clutch.The Vehicular system further includes additional instruction, when adjusting engine speed Engine is run with speed control mode when following DISG speed.The Vehicular system further includes additional instruction, via hair Motivation and DISG provide desired torque.The Vehicular system further includes fluid torque-converter and torque converter clutch, and is gone back Including additional instruction, increase torque converter clutch sliding to respond the desired torque.

The method of Fig. 1-3 and Figure 37-40 also provides the method for power train operation, comprising: via engine and transmission Assembly provides torque to the power train for being connected to wheel at starter/generator (DISG)；Enter with during the situation of selection Sail mode, which includes to power train offer DISG torque and tickover to power train offer without starting Machine torque.This method includes that the situation of the selection includes catalyst temperature lower than threshold temperature.This method includes the shape of the selection Condition includes that fuel vapour filter tank has stored steam more than threshold quantity.This method includes that the situation of the selection includes vacuum level Lower than threshold vacuum.This method includes that the situation of the selection includes engine coolant temperature lower than threshold temperature.This method packet The situation for including the selection includes that sport drive mode has been selected in driver.This method includes that engine is turned with sail mode idling Speed idle running, which is the idling speed lower than the base idle revolving speed when engine is connected to DISG.

The method of Fig. 1-3 and Figure 37-40 also provides the method for power train operation, comprising: via engine and transmission Assembly provides torque to the power train for being connected to wheel at starter/generator (DISG)；Enter boat during the situation of selection Row mode, which includes to power train offer DISG torque and tickover is without providing engine to power train Torque；And it responds the timing of engine sail mode early spark and reduces engine air amount.This method includes the selection Situation includes that catalyst temperature is lower than the threshold status for being equal to or more than charge with energy accumulating device state of charge.

In some instances, it includes that fuel vapour filter tank has been stored more than threshold quantity that this method, which includes the situation of the selection, Steam and energy accumulating device state of charge be equal to or more than charge threshold status.This method includes the situation packet of the selection Include the threshold status that vacuum level is equal to or more than charge lower than threshold vacuum and energy accumulating device state of charge.This method packet The situation for including the selection includes engine coolant temperature to be equal to or greatly lower than threshold temperature and energy accumulating device state of charge In the threshold status of charge.This method includes that the situation of the selection includes that sport drive mode and energy storage has been selected in driver Cryopreservation device state of charge is equal to or more than the threshold status of charge.This method includes that engine is empty with sail mode idling speed Turn, which is the idling speed lower than the base idle revolving speed when engine is connected to DISG.

The method of Fig. 1-3 and Figure 37-40 also provides a kind of Vehicular system, comprising: engine；Including being connected mechanically to this The double mass flywheel of first side of engine；It mechanically include the transmission for being connected to first side of second side of the double mass flywheel It is disconnect-type clutch；Power train integrated actuating including being connected to first side of second side of the power train disconnect-type clutch Machine/generator (DISG)；The speed changer of the engine is selectively connected to via the power train disconnect-type clutch；And control Device processed, the controller include the executable instruction being stored in non-transient memory, to enter boat during the situation of selection Row mode, wherein engine is run with sail mode idling speed without providing motor torque to speed changer, and wherein DISG torque is supplied to speed changer, and wherein the situation of the selection includes that the state of charge of battery is equal to or more than threshold value battery Charge.

In one example, which further includes additional instruction, is steamed with extracting fuel during the sail mode Vapour/fuel vapour rinses.The Vehicular system further includes additional instruction, to generate vacuum during the sail mode.The vehicle System further includes additional instruction, to increase catalyst temperature during the sail mode.The Vehicular system further includes additional Instruction, to increase engine temperature during the sail mode.The Vehicular system further includes that the threshold value battery charge is specified Battery charge.

Adaptive change (adapt) power train disconnect-type clutch transmission letter is shown referring now to Figure 41-42, Figure 41-42 Several methods.The method of Figure 41-42 can store the non-transient memory in the control 12 of Fig. 1-3 as executable instruction In.

4102, method 4100 judges that the situation for power train disconnect-type clutch adaptive change (adaption) is No presence.Power train disconnect-type clutch adaptive change can come into effect in the case where there: power train separate type clutch Device is in opening state, and after power train disconnect-type clutch reaches scheduled running temperature, and in engine and After DISG reaches the operating condition of selection, such as minimum engine and DISG running temperature.In yet another example, power train separates Formula clutch adaptive change can provide during face of fluid torque converter speed is greater than transformer turbine speed condition. If situation of the judgement of method 4100 for power train disconnect-type clutch adaptive change exists, answer is "yes" and square Method 4100 proceeds to 4104.Otherwise, answer is "No" and method 4100 proceeds to and exits.

4104, if without torque sensor or if engine do not rotate and combustion method 4100 open hydraulic moment changeable Device clutch (TCC) and DISG rotation.If there is torque sensor, then torque measurement is not based on pump impeller speed.If started Machine, which starts, to be rotated and burns, then the method for Figure 42 does not require DISG to rotate.When requiring DISG to rotate, DISG passes through by energy The electric current that storage device provides rotates under the power of their own.In one example, DISG is turned with the speed less than 1000RPM It is dynamic, therefore the torque of very little passes to speed changer by fluid torque-converter.Therefore, DISG can be become with providing to be less than by fluid power Square device to speed changer torque threshold quantity speed rotation.After opening torque converter clutch, method 4100 is carried out To 4106.

4106, method 4100 judges whether engine rotates simultaneously combustion air-fuel mixture.Take notice of in an example, When engine speed is greater than threshold velocity, engine can be judged as rotation and combustion air-fuel mixture.If side Method 4100 judges engine rotation and combustion air-fuel mixture, then answer is "yes" and method 4100 proceeds to 4150. Otherwise, answer is "No" and method 4100 proceeds to 4108

4150, method 4100 runs engine with speed control mode.Moreover, car speed can be zero.Work as transmission It is that engine can burn when disconnect-type clutch adaptive change starts or engine can start via starter or DISG Air-fuel mixture.Torque converter clutch is in opening state and utilizes engine air throttle, spark timing, convex Timing, valve stroke, fuel injection or other actuators are taken turns, engine torque control engine speed is passed through.Engine into Method 4100 proceeds to 4152 after entering speed control mode.

4152, method 4100 is by engine speed modulation to higher or lower than DISG speed.For example, if DISG speed It is 400RPM, engine speed is adjustable to arrive 800RPM.Alternatively, for example, if DISG speed is 800RPM, engine Speed is adjustable to arrive 700RPM.Method 4100 proceeds to 4154 after adjusting engine speed.

4154, method 4100 estimates motor torque and stores the motor torque of estimation in memory.Hair Motivation torque can be estimated as described in U.S. Patent number 7,066,121.Alternatively, motor torque can pass through Other known method estimation.For example, motor torque can be under the engine speed and engine load of selection very according to warp Test determination.The empirical data be stored in controller storage and by according to present engine speed and load come concordance list Or function and be retrieved.In estimation motor torque, method 4100 proceeds to 4156 by after.

4156, method 4100 gradually increases power train disconnect-type clutch applying pressure.In one example, pass through increasing The duty ratio increase of power train disconnect-type clutch control signal is added to carry out power train disconnect-type clutch application of force.Higher duty The oil pressure of power train disconnect-type clutch is supplied to than that will increase.Gradually increasing for power train disconnect-type clutch applying pressure can To predefine and be stored in memory as power train disconnect-type clutch transmission function.Power train disconnect-type clutch Transmission function is related with power train disconnect-type clutch applying pressure and power train disconnect-type clutch input torque, and exports Power train disconnect-type clutch output torque.By being transmitted with desired clutch output torque and clutch input torque index Function, power train disconnect-type clutch transmission function can also be used to selection power train disconnect-type clutch applying pressure.

When each power train disconnect-type clutch applying pressure increases, power train disconnect-type clutch applying pressure starts Machine revolving speed and the storage of DISG speed are in memory.Each disconnect-type clutch torque becomes new height (according to 4130 He of method Figure 43 may have the multiple levels utilized in order to obtain clutch transmission function), system needs can wait engine Velocity-stabilization is in desired engine speed, and then new motor torque estimation is stored.Once engine speed control Device processed has eliminated any interference from disconnect-type clutch torque variation, stores the motor torque of estimation and point of estimation From both formula clutch torques, in order to be used 460.Engine controller seeks the disconnect-type clutch pressure that can use estimation Or the symbol of capacity and the slippage of disconnect-type clutch two sides, it is increased or decreased and is started with suitably active (proactively) Machine torque, or the variation for disconnect-type clutch pressure, engine control can be only using feedback control to compensate engine Speed.Method 4100 proceeds to 4158 after power train disconnect-type clutch applying pressure increase.

4158, method 4100 judges whether power train disconnect-type clutch application distribution figure has been applied completely.One In a example, power train disconnect-type clutch application distribution figure be provided solely for enough pressure with transmit minimum torque (for example, 2Nm), just start to contact another clutch disc for a clutch disc.In another example, power train separate type from Clutch application distribution figure can be closed completely from fully opening to be converted to.If the judgement of method 4100 be not power train separate type from Whole pressure of clutch distribution map have been applied, then answering is "No" and method 4100 proceeds to 4154.Otherwise, answer is "Yes" and method 4100 proceeds to 4160.

4160, when power train disconnect-type clutch transmission function is by being gradually increased power train disconnect-type clutch application Pressure is by application, under the disconnect-type clutch pressure of each order, when engine speed is stablized under desired speed, Method 4100 compares power train disconnect-type clutch estimated value and storage from power train disconnect-type clutch transmission function Engine torque estimated value.For example, when input torque is 85N-m after power train disconnect-type clutch, in order to realize 50N-m's Desired disconnect-type clutch shows torque, if the power train separation of power train disconnect-type clutch transmission function output 35% Formula clutch duty cycle (corresponding desired power train disconnect-type clutch applying pressure or power), but motor torque estimator Estimated power train disconnect-type clutch output torque is 45N-m, then may determine that, when power train disconnect-type clutch inputs Torque is 85N-m, and when 35% duty ratio is applied to power train disconnect-type clutch, power train disconnect-type clutch transmits letter Number has the error of 5N-m.For power train disconnect-type clutch transmission function in every group of operating condition of 4156 applications, can determine Difference between desired power train disconnect-type clutch torque and motor torque.When power train disconnect-type clutch applying pressure When being gradually increased, the power train disconnect-type clutch torque determined by power train disconnect-type clutch transmission function with by starting Machine estimation torque ratio relatively after, method 4100 proceeds to 4162.

4162, the power train disconnect-type clutch torque estimated by engine is responded and according to power train separate type clutch Difference between power train disconnect-type clutch torque expected from device transmission function, method 4100 selection project (entry) more New transmission system disconnect-type clutch transmission function.In one example, if the power train separate type clutch estimated by engine Device torque is different from from the difference between the power train disconnect-type clutch torque that power train disconnect-type clutch transmission function is estimated, The correspondence in power train disconnect-type clutch transmission function is then replaced by the power train disconnect-type clutch torque of engine estimation Power train disconnect-type clutch torque.In this way, motor torque estimator can be adjust power train separate type from The basis of clutch transmission function.With wherein by engine estimation the torque of power train disconnect-type clutch and power train separate type from The value of the inconsistent selection of the power train disconnect-type clutch torque stated in clutch transmission function update separation transmission function it Method 4100 proceeds to 4164 afterwards, wherein.

If between disconnect-type clutch torque and first disconnect-type clutch torque based on motor torque estimation Difference be higher than threshold value, adaptive change timing can rerun, in next chance test macro again, and can be with Adaptive change timing is executed until the system is by successfully adaptive change.It should be pointed out that described herein all Adaptive change method can respond the size of the error of power train disconnect-type clutch transmission function more frequently, quickly, Or it is immediately performed.

4164, the modified power train disconnect-type clutch transmission function of the application of method 4100 is with predetermined power train separate type Clutch pressure.For example, when requiring to adjust power train disconnect-type clutch pressure, power train disconnect-type clutch pressure root According in 4162 modified power train disconnect-type clutch transmission function outputs.Exporting modified power train disconnect-type clutch pressure Method 4100 exits after power.

4108, method 4100 judges whether to require restarting engine.If be stopped in the rotation of 4108 engines, If it is desired to can then restart.If requiring engine to open again during power train disconnect-type clutch adaptive change Dynamic, then it is possible for error occur in the power train disconnect-type clutch transmission function of change.Therefore it is opened again in engine Without power train disconnect-type clutch adaptive change during dynamic.If method 4100, which determines, wishes that engine restarts, Then answer is "yes" and method 4100 proceeds to and exits.Otherwise, answer is "No" and method 4100 proceeds to 4110.

4110, method 4100 judges whether there is the drive train torque sensor of detection drive train torque.If method There are drive train torque sensors for 4100 judgements, then answer is "yes" and method 4100 proceeds to 4130.Otherwise, answer is "No" and method 4100 proceeds to 4112.

It should be pointed out that in some instances, as engine and DISG speed is held apart at (for example, power train separate type from Clutch sliding) and engine controller with closed loop engine speed control work, based on fluid torque-converter (for example, 4112- 4122) or the power train disconnect-type clutch adaptive change of torque sensor (for example, 4130-4138) can with based on transmission It is the motor torque of the estimation of disconnect-type clutch torque (for example, 4150-4164) while carries out.

4130, method 4100 is separated by sequentially increasing power train disconnect-type clutch applying pressure from power train Formula clutch is in full open position and increases power train disconnect-type clutch pressure.Power train disconnect-type clutch pressure can be with Increase at a predetermined rate, or is increased according to the power train disconnect-type clutch applying pressure of predetermined group of selection and increased.? Method 4100 proceeds to 4132 after increasing power train disconnect-type clutch applying pressure.DISG can be with constant order Speed (for example, idling speed~700RPM) velocity feedback mode operation.Alternatively, DISG speed can choose for compared with Low speed is to reduce energy consumption.

4132, after the completion of power train disconnect-type clutch application program, method 4100 changes according to adaptability is carried out The current power train disconnect-type clutch transmission function become adjusts DISG torque.Specifically, according to power train separate type clutch Device transmission function increases DISG from the amount of torque that DISG passes to engine via power train disconnect-type clutch based on estimation Torque.After adjusting DISG torque, method 4100 proceeds to 4134.

4134, method 4100 compares by the power train disconnect-type clutch amount of torque transmitted and the separation of the power train of order Formula clutch torque is (for example, the power train disconnect-type clutch torque required via power train disconnect-type clutch transmission function Amount).In one example, according to the position of drive train torque sensor, the torque of power train disconnect-type clutch can be via Following equation determines:

If drive train torque sensor is in face of fluid torque converter:

If drive train torque sensor is in transformer turbine/input shaft:

Wherein

WhereinIt is the power train disconnect-type clutch torque of estimation, I_{elec_machine}It is the inertia of DISG, N_impeller Face of fluid torque converter speed, T_sensorIt is the torque measured by torque sensor, T_{elec_machine}It is that the torque of DISG is shown, T_turbineThe torque of transformer turbine, cpc are fluid torque-converter capacity factor, N_turbineIt is face of fluid torque converter speed, And T_{conv_clutch}It is torque converter clutch torque.

During the situation that transformer turbine speed is less than face of fluid torque converter speed, torque converter clutch It opens, power train disconnect-type clutch opens (for example, it is desirable to the case where be stationary vehicle, pump impeller rotation~700RPM), according to Accelerate the capacity factor (cpc) for adaptively correcting fluid torque-converter using the motor torque and pump impeller of above equation.Become in fluid power During the situation that the rotation of square device pump impeller, power train disconnect-type clutch are opened and engine restarting is not command by, power train Disconnect-type clutch torque is command by sequentially higher.According to power train disconnect-type clutch stroke pressure or contact point (for example, When power train disconnect-type clutch changes from opening state to partly closed state, power train disconnect-type clutch is command by The point contacted first to the power train disconnect-type clutch piece for outputting and inputting side in power train disconnect-type clutch), transmission It is that disconnect-type clutch torque is influenced by DISG compensated torque with reducing vehicle drivability.In one example, according to working as Preceding clutch transmission function, DISG torque increase proportional to the amount of power train disconnect-type clutch torque of estimation.

In the case where the torque appropriate compensated between power train disconnect-type clutch and torque sensor and inertia, pass Dynamic is that disconnect-type clutch estimation can be compared with the measured value from torque sensor.Power train disconnect-type clutch row Adjust to stroke pressure/being adapted to property of contact point.In one example, power train disconnect-type clutch transmission function passes through with estimating The power train disconnect-type clutch torque of meter replaces the value in power train disconnect-type clutch transmission function to adjust.It is alternative Ground, power train disconnect-type clutch transmission function can be according to the power trains of power train disconnect-type clutch transmission function and estimation Error between disconnect-type clutch torque is adjusted.

It is transmitted if the power train disconnect-type clutch torque of order is less than or greater than by power train disconnect-type clutch The scheduled amount of torque then turns the power train disconnect-type clutch in the operating point power train disconnect-type clutch transmission function Square value adjusts the power train disconnect-type clutch torque to measurement.

In this way it is possible to which it is improved by power train to provide to adjust power train disconnect-type clutch torque transfer function The estimation of the amount of torque of disconnect-type clutch transmitting.In power train disconnect-type clutch torque transfer function under current operating condition Be evaluated and/or adaptive change after method 4100 proceed to 4136.

4136, method 4100 judges in the promising power train disconnect-type clutch applying pressure underdrive system separation of institute Whether the promising part of institute of formula clutch torque transmission function is evaluated and/or adjusts.If evaluated and/or tune Section, then answer is "yes" and method 4100 proceeds to 4138.Otherwise, answer is "No" and method 4100 returns to 4130, Increase in 4130 power train disconnect-type clutch applying pressures and power train disconnect-type clutch torque transfer function is new It is reappraised under operating condition.

4138, the modified power train disconnect-type clutch transmission function of the application of method 4100 is with predetermined power train separate type Clutch pressure.For example, when require adjust power train disconnect-type clutch pressure when, power train disconnect-type clutch pressure according to In 4134 modified power train disconnect-type clutch transmission function outputs.In modified power train disconnect-type clutch pressure output Method 4100 exits later.

4112, as described in 4130, method 4100 increases from the completely open state of power train disconnect-type clutch to be passed Dynamic is disconnect-type clutch applying pressure.It can be zero at this moment car speed, and power train disconnect-type clutch order can To gradually increase, to increase power train disconnect-type clutch applying pressure or power.Adjusting the application of power train disconnect-type clutch Method 4100 proceeds to 4114 after pressure.

4114, as described in 4132, method 4100 adjusts DISG torque.After adjusting DISG torque method 4100 into It goes to 4116.

4116, method 4100 according to the speed of power train part and and acceleration estimation by power train disconnect-type clutch The torque of transmitting.In one example, the torque transmitted by power train disconnect-type clutch can be estimated by following equation:

Wherein:

The solution of power train disconnect-type clutch torque:

Wherein I_impellerIt is face of fluid torque converter inertia, N_impellerIt is face of fluid torque converter speed, T_clutchIt is to pass Dynamic is the torque of disconnect-type clutch, T_{elec_machine}It is DISG torque, T_convIt is face of fluid torque converter torque, cpc is fluid power Torque-converters capacity factor, N_turbineIt is transformer turbine speed, and T_{conv_clutch}It is torque converter clutch torque.

Transformer turbine speed be less than face of fluid torque converter speed situation during, fluid torque-converter bypass from Clutch is opened, and power train disconnect-type clutch opens (for example, it is desirable to the case where be stationary vehicle, pump impeller rotation~700RPM), The capacity factor (cpc) of fluid torque-converter based on motor torque and pump impeller acceleration is adaptively repaired via above equation Just.During pump impeller rotation, power train disconnect-type clutch opening and not order engine restarting situation, command timing Upper higher power train disconnect-type clutch torque.The torque of power train disconnect-type clutch is driven via DISG compensated torque with reducing The influence of sailing property.The torque of power train disconnect-type clutch based on power train disconnect-type clutch stroke pressure it is current estimation or The contact point of power train disconnect-type clutch.

For example, DISG torque increases when power train disconnect-type clutch torque increases.In one example, DISG torque Proportionally increase with the torque transmitted via power train disconnect-type clutch.4118, which turns Square is carried out with according to other torques, velocity and acceleration using the power train disconnect-type clutch torque that above equation calculates Compare.Then 4118 power train disconnect-type clutch stroke pressures/power train disconnect-type clutch contact point adaptively It updates.Method 4100 proceeds to 4118 after the amount for the torque transmitted by power train disconnect-type clutch is estimated.

4118, as described in 4134, method 4100 compares the torque of estimation transmitted by power train disconnect-type clutch With the power train disconnect-type clutch torque from current power train disconnect-type clutch transmission function.This can relatively pass through The power train disconnect-type clutch torque for subtracting estimation from desired power train disconnect-type clutch torque carries out, to provide mistake Difference, the error are the bases for adaptive change power train disconnect-type clutch transmission function.When error is greater than scheduled amount When, the power train disconnect-type clutch torque of estimation replaces the power train separate type in power train disconnect-type clutch transmission function The value of clutch, or the basis for adjusting power train disconnect-type clutch transmission function.In estimation by power train point From formula clutch transmitting torque amount with from the power train disconnect-type clutch torque of power train disconnect-type clutch function After being compared, method 4100 proceeds to 4120.

4120, method 4100 judge under the promising power train disconnect-type clutch applying pressure of institute whether all biographies Dynamic is that the desired part of disconnect-type clutch transmission function has been evaluated and/or has adjusted.If it is, answer is "yes" and Method 4100 proceeds to 4122.Otherwise, answer is "No" and method 4100 back to 4112,4112 power train separate types from Clutch applying pressure increases and power train disconnect-type clutch transmission function is evaluated under new operating condition.

4122, method 4100 separates modified power train disconnect-type clutch transmission function applied to predetermined power train Formula clutch pressure.For example, when requiring to adjust power train disconnect-type clutch pressure, power train disconnect-type clutch pressure According in 4118 modified power train disconnect-type clutch transmission function outputs.Exporting modified power train disconnect-type clutch Method 4100, which proceeds to, after pressure exits.

In some instances, power train disconnect-type clutch can be with double-clutch automatic gearbox (DCT) (for example, figure 3) it is used in combination.In such applications, DISG may be used as torque master, to restart and start according in engine The DCT launch clutch torque measurement DCT launch clutch that period orders in the case where the low torque that the launch clutch is run is horizontal Torque.Then gain and/or deviation can update in DCT launch clutch torque indicator, to match actual input or output Torque.It with an example for detecting DCT launch clutch torque include: when vehicle stops and brakes and is applied using DISG When, such as when vehicle is in stationary state and operator's application braking or braking system are command by postpone braking release, Measure the torque of DCT engine clutch.This operation can be used to that the variation in DCT launch clutch torque is prevented to be delivered to Wheel influences vehicle acceleration.

In some instances, power train disconnect-type clutch can be open.The power train disconnect-type clutch of opening Remove the engine or double mass flywheel (DMF) turn that can influence the ability that DISG accurately detects DCT launch clutch torque Square or biddability interaction.DISG can be with the velocity feedback mode operation with constant command speed, such as idling Revolving speed~700RPM.DISG speed can choose as lower speed to reduce energy consumption.DISG speed can be set into logical It crosses and rotates transmission fluid press pump using DISG to keep hydraulic in automatic transmission (AT).Operation DISG with keep be applied to The transmission pressure of the dry clutch DCT opposite DCT with hydraulic clutch.

In some instances, when learning DISG torque estimation, DCT launch clutch is fully opened (for example, having zero-turn Square capacity).DISG torque estimation is the base of the opening DCT launch clutch torque for being recorded under the DISG speed of order Plinth.DISG torque estimation is the letter of the torque of the order of DISG three-phase current or the inner looping from DISG speed feedback control Number.In open DCT launch clutch torque, DCT is sent out in desired torque range after the determination of DISG torque estimation Dynamic clutch is command by as operation.DCT launch clutch torque in desired torque range for the torque of each order The DISG torque determined from the torque in each order determines.DCT launch clutch error torque is confirmed as open DCT hair Difference between dynamic clutch torque measurement and the torque of torque or order from the detection of DISG three-phase current torque estimation.Work as determination When DCT launch clutch torque, DISG can with include internal torque circuit velocity feedback mode operation.DCT torque indicator or biography Delivery function is updated according to observation DISG torque.

Moreover, changeability in actuating and the estimation via the torque of TCC transmitting, which can be, can influence Vehicular system Bad steering performance noise factor.If during engine restarting due to order and actual TCC torque it Between error, TCC torque improperly activates, pass to wheel torque can be less than desired torque and launch metrics and Driving performance possible deviation.

DISG can be used as torque master work, using the letter as the TCC torque ordered during engine start The torque that number measurement is transmitted via TCC.During engine start via TCC transmitting low torque level and start to can be use In updating the gain in TCC torque indicator and/or the basis of deviant, so that tabular value matching is actual to be input to output torque.

Operation DISG includes: when vehicle stopping is and when using braking with an example for detecting the TCC torque of transmitting When (for example, when vehicle be in stationary state and operator application braking) via DISG measure TCC torque.Another example packet It includes in order to which ramp keeps estimating the TCC transmitted via DISG when automatic transmission clutch connection speed changer exports.Connection becomes A possibility that TCC torque that fast device reduces transmitting is delivered to wheel.

It can be more accurately determined when power train disconnect-type clutch is opened via the torque of TCC transmitting, because it is removed The engine, double mass flywheel or biddability that can influence DISG torque estimation is gone to interact.When DISG is for TCC torque When transmitting the basis of estimation, under the speed (for example, idling speed~700RPM) of low constant command, DISG can be anti-with speed Mode operation is presented, to reduce energy consumption.By with DISG rotate speed changer also adjustable DISG speed to keep fluid power to become It is hydraulic in square device.

Description can root by the TCC transmission function of the TCC amount of torque transmitted in the case where the applying pressure of selection or power The adaptive change according to DISG torque estimation.In one example, TCC, which is command by, fully opens (for example, having zero-turn square to hold Amount) and fluid torque-converter output based on DISG electric current and be estimated.DISG electric current is converted into torque, the torque from TCC not It is subtracted in the torque determined in the case where being command by completely open others TCC order.Therefore, turn when TCC is fully opened Square offset is determined and stores in memory.Then, when DISG torque is estimated from DISG electric current under the torque of each order Timing, TCC is command by be gradually increased in desired torque range.TCC transmits torque error amount from TCC open loop torque command It (for example, TCC transmission function) and is determined from the difference between the TCC torque that DISG three-phase current determines.TCC transmission function can be with Torque error is transmitted according to TCC to update.In one example, a part of each TCC transmitting torque error is added to correspondence In the current value of the TCC transmission function of TCC transmitting torque error.

In this way, power train disconnect-type clutch transmission function can be corrected, so that power train disconnect-type clutch It can more accurately apply.Moreover, power train disconnect-type clutch transmission function can be corrected without coming to driver Say apparent movement.

It is shown referring now to Figure 43, Figure 43 and updates the transmitting of power train disconnect-type clutch for the method according to Figure 41 and 42 The exemplary timing of function.The timing of Figure 43 can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 43 indicates the graph of relation of face of fluid torque converter speed and time.Y-axis table Show face of fluid torque converter speed and face of fluid torque converter speed increases along the direction of Y-axis arrow.X-axis indicates the time simultaneously And the time increases from the right side of the left lateral view of figure.Horizontal line 4302 indicates desired face of fluid torque converter speed.

The second figure from the top of Figure 43 indicates the graph of relation of DISG torque and time.Y-axis indicates DISG torque And DISG torque increases along the direction of Y-axis arrow.X-axis indicates the time and the time increases from the right side of the left lateral view of figure Add.

Third figure from the top of Figure 43 indicates the relationship of power train disconnect-type clutch application of force or pressure and time Curve graph.Y-axis indicate power train disconnect-type clutch application of force or pressure and application of force or pressure along Y-axis arrow direction Increase.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.

In time T₁₀₂Before, face of fluid torque converter speed is in desired face of fluid torque converter speed 4302, and DISG torque is in lower level.Power train disconnect-type clutch pressure is also at lower value.If DISG is in speed In control, then the amplitude of the variation for the DISG torque for keeping desired pump impeller speed is required to may be used as torque estimation mechanism, class It is similar to the mode that Figure 42 uses motor torque.

In time T₁₀₂, power train disconnect-type clutch pressure response increases to be turned by what power train disconnect-type clutch transmitted Square and increase.DISG torque does not increase, because power train disconnect-type clutch transmission function is indicated in current bid value torque It is not passed disconnect-type clutch transmitting.Face of fluid torque converter speed is maintained at desired face of fluid torque converter speed, or DISG torque is not required to change in closed speed control mode, and it indicates estimation power train disconnect-type clutch torque Power train disconnect-type clutch transmission function is correct.Power train separates after power train disconnect-type clutch pressure increase Formula clutch pressure reduces, therefore the increase next time of disconnect-type clutch pressure can be since known situation.

In time T₁₀₃, response increases the requirement of torque transmitted by power train disconnect-type clutch, power train separate type from Second of the increase of clutch pressure.DISG torque does not increase again, because power train disconnect-type clutch transmission function indicates It is disconnect-type clutch transmitting that current bid value torque, which is not transmitted,.Since closed loop rpm is controlled, face of fluid torque converter speed Reduce or DISG torque increases, indicates that power train disconnect-type clutch torque transfer function is estimating the power train being passed Disconnect-type clutch torque.Power train disconnect-type clutch transfer function errors can be from the torque sensing of disconnect-type clutch Device, DISG electric current or the model in 4116 descriptions determine.Power train disconnect-type clutch transmission function is according to the regulating error. Specifically, in this illustration, scheduled amount can be reduced for exporting the torque of the estimation of order.Alternatively, it uses Scheduled amount can be reduced in the output order of power train disconnect-type clutch.Power train disconnect-type clutch pressure increase it It is reduced afterwards, therefore increase next time can be since known situation for power train disconnect-type clutch pressure.

In time T₁₀₄, the torque that response increase is transmitted by power train disconnect-type clutch, power train disconnect-type clutch pressure Power third time increases.DISG torque increases, because power train disconnect-type clutch transmission function indicates to turn in current bid value Square is transmitted by power train disconnect-type clutch.Face of fluid torque converter speed increases, or controls to adjust DISG by closed loop rmp and turn Square, it is more as the expression of power train disconnect-type clutch transmission function so as not to increase, indicate power train disconnect-type clutch The excessively high power train disconnect-type clutch torque for estimating to be passed of transmission function.It can determine that power train disconnect-type clutch transmits Function error and according to the regulating error power train disconnect-type clutch transmission function.Specifically, in this illustration, it is used for The torque for exporting the estimation of order increases scheduled amount.It alternatively, can for the output order of power train disconnect-type clutch To increase scheduled amount.It is reduced after power train disconnect-type clutch pressure increase, therefore power train separate type clutch Device pressure increases next time can be since known situation.

In time T₁₀₅, the torque that response increase is transmitted by power train disconnect-type clutch, power train disconnect-type clutch pressure Power the 4th time increase.DISG torque increases, because power train disconnect-type clutch transmission function indicates to turn in current bid value Square is transmitted by power train disconnect-type clutch.Face of fluid torque converter speed is kept constant, to indicate power train separate type clutch Device torque transfer function correctly estimates the power train disconnect-type clutch torque being passed.The transmitting of power train disconnect-type clutch Function is not conditioned, because error is less than threshold error amount in the estimation of power train disconnect-type clutch torque transfer.It is passing It is dynamic to be that it is reduced after disconnect-type clutch pressure increase, therefore increase next time can be with for power train disconnect-type clutch pressure Since known situation.

Go out referring now to Figure 44, Figure 44 and the transmitting of power train disconnect-type clutch is updated or corrected for the method according to Figure 42 The exemplary timing of function.The timing of clutch torque shown in Figure 43 can be applied to the timing of Figure 42.The timing of Figure 44 It can be provided by the system of Fig. 1-3.

The first figure from the top of Figure 44 indicates the graph of relation of engine speed and time.Y-axis indicates engine Speed and engine speed increase along the direction of Y-axis arrow.X-axis indicates the right side of time and time from the left lateral view of figure Side increases.Horizontal line 4402 indicates desired engine speed.

The second figure from the top of Figure 44 indicates the graph of relation of motor torque and time.Y-axis indicates engine Torque and motor torque increase along the direction of Y-axis arrow.X-axis indicates the right side of time and time from the left lateral view of figure Side increases.

Third figure from the top of Figure 44 indicates the relationship of power train disconnect-type clutch application of force or pressure and time Curve graph.Y-axis indicate power train disconnect-type clutch application of force or pressure and application of force or pressure along Y-axis arrow direction Increase.X-axis indicates the time and the time increases from the right side of the left lateral view of figure.

In time T₁₀₆Before, engine speed is in desired engine speed 4402, and motor torque be in compared with Low level.Power train disconnect-type clutch pressure be also at lower value and order power train disconnect-type clutch to open Position.Engine is in speed control mode and motor torque is from engine speed and engine load (such as current hair For motivation air quality divided by theoretical air mass, engine being capable of natural aspiration or super charge) it determines.DISG speed and fluid power Torque-converters speed (not shown) is adjusted to the speed different from desired engine speed.

In time T₁₀₆, power train disconnect-type clutch pressure response increases to be turned by what power train disconnect-type clutch transmitted Square and increase.When power train disconnect-type clutch application of force increases, DISG speed (not shown) is remained unchanged and desired hair Motivation speed remains unchanged.When power train disconnect-type clutch is gradually closed, motor torque is initially maintained at constant water It is flat.

In time T₁₀₇, power train disconnect-type clutch pressure continues growing and engine speed is initially increased to be less than The speed of desired engine speed.Respond the difference of desired engine speed and actual engine speed, engine control Circuit increases motor torque (for example, by opening engine air throttle).When power train disconnect-type clutch application of force increases When (for example, in T₁₀₇The very short time later), the power train disconnect-type clutch torque of estimation is the hair before time T106 Motivation torque and in time T₁₀₆The difference between motor torque later.Respond desired power train disconnect-type clutch torque The power train disconnect-type clutch transmission function for exporting power train disconnect-type clutch application of force or pressure can be according to estimation Drive train torque is adjusted.

In this illustration, from the power train separation of the estimation determined under the power train disconnect-type clutch pressure of order The power train disconnect-type clutch transmission function project that formula clutch torque value obtains can be updated to estimation power train separation Formula clutch torque, or if they are greater than the threshold quantity of torque from the power train disconnect-type clutch torque of estimation variation, Then renewal amount is a part of error.When adaptive change process occurs or the power train disconnect-type clutch after the timing Transmission function can update.It should also be noted that when power train disconnect-type clutch closure in time T₁₀₇Engine speed can be with Increase rather than reduces.In this example, face of fluid torque converter speed is adjusted to the speed greater than engine speed, so as to When power train disconnect-type clutch closure, engine speed is in time T₁₀₇Increase.

In time T₁₀₈, the torque that response requires reduction to be transmitted by power train disconnect-type clutch, power train separate type clutch Device pressure reduces.Actual engine speed is greater than desired engine speed after the reduction of power train disconnect-type clutch pressure Degree.When the power train disconnect-type clutch torque of estimation is different from the project in power train disconnect-type clutch transmission function not When being same as the power train disconnect-type clutch torque of estimation, power train disconnect-type clutch transmission function can update.

In this way it is possible to update the transmission function for the torque that description is transmitted by power train disconnect-type clutch.At this Each power train disconnect-type clutch applying pressure can update in this way in transmission function, therefore entire transmission function can To be corrected with vehicle ages.

The method and system of Fig. 1-3 and Figure 41-44 also provides power train disconnect-type clutch adaptive change method, packet It includes: engine in power transmission system of vehicle not combustion air and response torque sensor adjusts power train separate type when fuel The application of force of clutch.In this way it is possible to adaptive change power train disconnect-type clutch transmission function, to improve vehicle Driving performance.This method further includes responding the transmission function of torque sensor adaptive change power train disconnect-type clutch.It should Method further includes responding the transmission function of the response change power train disconnect-type clutch of the component of power train.

In some instances, this method includes the power train point according to the situation opened from power train disconnect-type clutch Applying pressure from formula clutch adjusts the application of power train disconnect-type clutch.This method, which is included in, adjusts power train separate type Power train integrated actuating machine/generator is rotating during the application of clutch.This method, which is included in, adjusts power train separate type Speed changer lock-up clutch is open during the application of clutch.

The method and system of Fig. 1-3 and Figure 41-44 also provides power train disconnect-type clutch adaptive change method, packet It includes: rotating face of fluid torque converter to be less than the speed of a certain speed, which is greater than transmits in face of fluid torque converter To the threshold percentage of the torque of transformer turbine, the face of fluid torque converter is in vehicle transmission system；It is passed in vehicle Engine in dynamic system not combustion air and response torque sensor adjusts the power train separate type in vehicle transmission system when fuel The application of force of clutch.The power train disconnect-type clutch adaptive change method includes that the speed is less than 700RPM.

In one example, power train disconnect-type clutch adaptive change method includes passing through adaptive change power train Disconnect-type clutch transmission function adjusts application of force.The power train disconnect-type clutch adaptive change method further includes increasing to pass It is dynamic to be disconnect-type clutch order and power train disconnect-type clutch transmission function is adjusted according to the output of the torque sensor. The power train disconnect-type clutch adaptive change method further includes that torque converter clutch is opened in order.Power train separation Formula clutch adaptive change method includes via power train integrated actuating machine/generator rotation face of fluid torque converter.The biography Dynamic be disconnect-type clutch adaptive change method includes power train integrated actuating machine/generator to generate speed changer threshold value oil pressure Speed rotation, which is maintained at application state for transmission clutch.The power train disconnect-type clutch adaptive change Method includes that face of fluid torque converter is rotated with the speed for being greater than transformer turbine speed.

The method and system of Fig. 1-3 and Figure 41-44 also provides a kind of Vehicular system, comprising: engine；Including mechanically connecting It is connected to the double mass flywheel of the first side of the engine；It mechanically include the first side for being connected to second side of the double mass flywheel Power train disconnect-type clutch；Transmission assembly including being connected to first side of second side of the power train disconnect-type clutch At starter/generator (DISG)；The speed changer of engine is selectively connected to by the power train disconnect-type clutch；With And controller, the controller include the executable instruction being stored in non-transient memory, to respond torque sensor output Adjust the estimation for the torque transmitted by the power train disconnect-type clutch.The Vehicular system include engine not combustion air and Fuel.

In some instances, which includes rotating DISG with certain speed, lower than the threshold of speed DISG torque Value percentage passes to speed changer.The Vehicular system further include include the fluid torque-converter of torque converter clutch and additional Instruction, with adjust transmitted by power train disconnect-type clutch torque estimation while to open fluid torque-converter clutch Device.The Vehicular system further includes additional instruction, to rotate fluid torque-converter with the speed for being higher than transformer turbine Pump impeller.The Vehicular system further includes additional instruction, to increase the closing force for being applied to power train disconnect-type clutch.

The method and system of Fig. 1-3 and Figure 41-44 also provides power train disconnect-type clutch adaptive change method, packet It includes: face of fluid torque converter is rotated with First Speed；Engine is run with speed control mode and to be different from First Speed Second speed rotate engine；The power train disconnect-type clutch is adjusted with torque estimation of the response based on engine operating condition to pass Delivery function.This method includes rotating face of fluid torque converter by engaging the power train of starter/generator.

In some instances, this method includes that the second speed is greater than First Speed.This method includes that the second speed is small In First Speed.This method includes that engine operating condition is engine speed and engine load.This method further includes that order increases The application of force of power train disconnect-type clutch.This method, which is also wrapped, increases the same of the application of force of power train disconnect-type clutch in order When adjust motor torque engine speed is maintained at second speed.

The method and system of Fig. 1-3 and Figure 41-44 also provides power train disconnect-type clutch adaptive change method, packet It includes: face of fluid torque converter is rotated with First Speed；Engine is run with speed control mode and to be different from First Speed Second speed rotate engine；Power train disconnect-type clutch, which is opened, with response stores motor torque output valve；Gradually close Close power train disconnect-type clutch；And it responds the torque estimation based on engine operating condition and is based on power train disconnect-type clutch Difference between the torque estimation of transmission function adjusts power train disconnect-type clutch transmission function.

In one example, power train disconnect-type clutch adaptive change method includes that First Speed is less than 700RPM. It includes engine speed and engine load that the power train disconnect-type clutch adaptive change method, which includes engine operating condition,.It should It is that motor torque subtracts that power train disconnect-type clutch adaptive change method, which includes the torque estimation based on engine operating condition, The motor torque stored during opening power train disconnect-type clutch.The power train disconnect-type clutch adaptive change side Method further includes adjusting engine speed by adjusting motor torque during speed control mode.The power train separate type from Clutch adaptive change method includes via power train integrated actuating machine/generator rotation face of fluid torque converter.The power train Disconnect-type clutch adaptive change method includes power train integrated actuating machine/generator to generate the speed of speed changer threshold value oil pressure Transmission clutch is maintained at application state by degree rotation, the threshold value oil pressure.The power train disconnect-type clutch adaptive change Method includes that face of fluid torque converter is rotated with the speed for being greater than transformer turbine speed.

The method and system of Fig. 1-3 and Figure 41-44 also provides a kind of Vehicular system, comprising: engine；Including mechanically connecting It is connected to the double mass flywheel of the first side of the engine；It mechanically include the first side for being connected to second side of the double mass flywheel Power train disconnect-type clutch；Transmission assembly including being connected to first side of second side of the power train disconnect-type clutch At starter/generator (DISG)；The speed changer of engine is selectively connected to by the power train disconnect-type clutch；With And controller, the controller include the executable instruction being stored in non-transient memory, to respond motor torque estimation Adjust the estimation for the torque transmitted by the power train disconnect-type clutch.The Vehicular system includes that motor torque estimation is based on Engine speed and load.

In some instances, which further includes additional instruction, for certain speed rotation engine and DISG, the threshold percentage lower than speed DISG torque pass to speed changer.The Vehicular system further includes additional instruction, is used In rotating DISG with certain speed, which is less than the speed of engine start rotation.The Vehicular system further includes additional Instruction, to carry out closed loop engine speed control by adjusting motor torque while estimating motor torque.

The method and system of Fig. 1-3 and Figure 41-44 provides power train disconnect-type clutch adaptive change method, comprising: Engine in vehicle transmission system not combustion air and response torque sensor adjusts power train disconnect-type clutch when fuel Application of force.This method further includes responding the transmission function of torque sensor adaptive change power train disconnect-type clutch.It should Method further includes responding the transmission function of the response adaptive change power train disconnect-type clutch of the component of power train.This method Including being open situation tune from wherein power train disconnect-type clutch based on increase power train disconnect-type clutch applying pressure Save the application of power train disconnect-type clutch.This method includes the power train during the application for adjusting power train disconnect-type clutch Integrated actuating machine/generator is rotating.This method includes the gear shift lock during the application for adjusting power train disconnect-type clutch Only clutch is open.

The method and system of Fig. 1-3 and Figure 41-44 provides power train disconnect-type clutch adaptive change method, comprising: Face of fluid torque converter is rotated to be less than the speed of a certain speed, which, which is greater than, passes to liquid in face of fluid torque converter The threshold percentage of the torque of power torque converter turbine, the face of fluid torque converter is in vehicle transmission system；With in vehicle transmission system In engine not combustion air and response torque sensor adjusts the power train separate type clutch in vehicle transmission system when fuel The application of force of device.The power train disconnect-type clutch adaptive change method includes that the speed is less than 700RPM.

In some instances, which includes being driven by adaptive change It is the application of force that disconnect-type clutch transmission function adjusts power train disconnect-type clutch.The power train disconnect-type clutch adapts to The method of sexually revising further includes increasing the order of power train disconnect-type clutch and adjusting power train according to the output of torque sensor Disconnect-type clutch transmission function.The power train disconnect-type clutch adaptive change method further include order fluid torque-converter from Clutch is opened.The power train disconnect-type clutch adaptive change method includes turning via power train integrated actuating machine/generator Dynamic face of fluid torque converter.The power train disconnect-type clutch adaptive change method includes power train integrated actuating machine/power generation Machine is rotated with the speed for generating speed changer threshold value oil pressure, which is maintained at application state for transmission clutch.The biography Dynamic be disconnect-type clutch adaptive change method includes that face of fluid torque converter is turned with the speed for being greater than transformer turbine It is dynamic.

The method and system of Fig. 1-3 and Figure 41-44 also provides a kind of Vehicular system, comprising: engine；Including mechanically connecting It is connected to the double mass flywheel of the first side of the engine；It mechanically include the first side for being connected to second side of the double mass flywheel Power train disconnect-type clutch；Transmission assembly including being connected to first side of second side of the power train disconnect-type clutch At starter/generator (DISG)；The speed changer of engine is selectively connected to by the power train disconnect-type clutch；With And controller, the controller include the executable instruction being stored in non-transient memory, to respond torque sensor output Adjust the estimation for the torque transmitted by the power train disconnect-type clutch.

In one example, which includes engine not combustion air and fuel.The Vehicular system includes with one Constant speed degree runs DISG, and the threshold percentage lower than speed DISG torque passes to speed changer.The Vehicular system further includes packet Include torque converter clutch fluid torque-converter and additional instruction, with adjust transmitted by power train disconnect-type clutch Torque estimation while open torque converter clutch.The Vehicular system further includes additional instruction, so as to be higher than The pump impeller of the speed rotation fluid torque-converter of transformer turbine.The Vehicular system further includes additional instruction, is answered with increasing Closing force for power train disconnect-type clutch.

Method described above and system can deduce the torque in the different location of fluid torque-converter.Figure 45-48 description Determine an example of the torque at face of fluid torque converter and turbine.

The function of description fluid torque-converter K factor is shown referring now to Figure 45, Figure 45.The fluid torque-converter K factor and liquid Power converter pump is related with the speed ratio of turbine.The K factor of Figure 45 can indicate are as follows:

Wherein K is fluid torque-converter K factor, N_turbineIt is transformer turbine speed, and N_impellerFluid torque-converter Pump impeller speed, fn are the functions for describing K factor.Then it can be described as in the torque of face of fluid torque converter:

Wherein T_impFace of fluid torque converter torque, and 1.558 be conversion factor from ft-lbf to N-m.Upper relation of plane Suitable for speed ratio < 1.

Present reference Figure 46, Figure 46 shows description as face of fluid torque converter speed to transformer turbine speed The ratio between function fluid torque-converter capacity factor function.According to following formula, the capacity factor is related with K factor:

Wherein Capacity_Factor is fluid torque-converter capacity factor, and K is fluid torque-converter K recited above Factor.Function described in Figure 46 can be used together with function described in Figure 47 and 48, with the behavior for fluid torque-converter Modeling.The each project for forming the curve of Figure 46 can be empirically determined and be stored in controller storage.

Description is shown as face of fluid torque converter speed to transformer turbine speed referring now to Figure 47, Figure 47 The function of the fluid torque-converter torque ratio (TR) of the function of ratio.The function of Figure 47 can be with function described in Figure 46 and Figure 48 It is used together, for fluid torque-converter behavior modeling.Formed Figure 47 curve each project can it is empirically determined and It is stored in controller storage.Function shown in Figure 47 includes the Y-axis for indicating fluid torque-converter torque ratio.X-axis indicates fluid power Speed ratio of the converter pump to turbine.It can be seen that in fluid torque-converter torque ratio and face of fluid torque converter to turbine By there is inverse relation between speed ratio.TR can be described as:

TR fluid torque-converter torque ratio herein, fn are the function for describing the torque ratio, N_turbineIt is fluid torque-converter whirlpool Wheel speed, and N_impellerIt is face of fluid torque converter speed.Fluid torque-converter torque ratio is related with face of fluid torque converter speed:

T_turbine=T_impeller·TR

Or

One function is shown referring now to Figure 48, Figure 48, as face of fluid torque converter speed to fluid torque-converter whirlpool The function of the ratio between wheel speed describes the fluid torque-converter capacity factor of Figure 46 multiplied by the fluid torque-converter torque ratio of Figure 47.

The function of Figure 48 description can be used together with function described in Figure 46 and 47, be built for the behavior of fluid torque-converter Mould.The each project for forming the curve of Figure 48 can be empirically determined and be stored in controller storage.Shown in Figure 48 Function include indicate fluid torque-converter capacity factor multiplied by fluid torque-converter torque ratio Y-axis.Y-axis indicates fluid torque-converter pump Take turns the speed ratio to turbine.

In one example, the function fluid torque-converter of Figure 46 is by pump impeller speed to the ratio between transformer turbine speed It indexes and its output is multiplied by face of fluid torque converter velocity squared, to provide the estimation of face of fluid torque converter speed.Figure 47 Function use with fluid torque-converter by pump impeller speed to the ratio between transformer turbine speed index and its output by Figure 48 Function multiply, to provide the estimation of transformer turbine torque.The torque of fluid torque-converter two sides is face of fluid torque converter Difference between torque and transformer turbine torque.It is, of course, also possible to be determined fluid torque-converter by pump impeller speed and liquid The inverted running of power torque converter turbine speed.

Therefore, the operation of fluid torque-converter can be estimated according to the model for including the function that Figure 45-48 is described.Specifically, Fluid torque-converter can provide the estimation of face of fluid torque converter torque or transformer turbine torque as DISG torque or The estimation of wheel torque, because fluid torque-converter is connected mechanically to DISG and speed changer.

As can be understood by persons skilled in the art, method described in Fig. 4-44 can indicate any amount of processing It is one or more in strategy such as event driven, interrupting driving, multitask, multithreading etc..Therefore, shown Various steps or function can carry out in the order shown, carry out simultaneously, or can be omitted in some cases.Equally, it is Realization objects, features and advantages described here, the order of processing are not required, but in order to be easy to show and describe and It provides.Although not clearly stating, it will be recognized by those skilled in the art movement or function shown in one or more It can repeatedly be carried out according to specific policy used.

Terminate this specification herein.Those skilled in the art, which read the specification and will be appreciated that, does not depart from spirit of the invention Many change and modification of spirit and scope.For example, with natural gas, gasoline, diesel oil or alternative fuel configuration operation I3, I4, The present invention can be used to embody advantage in I5, V6, V8, V10 and V12 engine.

Claims

1. a kind of method of operation of hybrid vehicle power train, comprising:

Engine start is responded to require to open the torque converter clutch of closure；

After opening the torque converter clutch, as transformer turbine speed and desired face of fluid torque converter The function of torque adjusts power train integrated actuating machine/generator, that is, DISG speed；

In response to the torque of operator demand, increase disconnect-type clutch pressure to transmit the torque from the DISG to rotate The engine, the DISG torque of order are the torque of power train disconnect-type clutch and driver requested the sum of the torque； And

When engine speed is equal to the DISG speed, the power train disconnect-type clutch is locked.

2. according to the method described in claim 1, further comprising determining institute via power train disconnect-type clutch transmission function Power train disconnect-type clutch torque is stated, and adjusts torque in response to DISG during increasing the disconnect-type clutch pressure It exports and adjusts the power train disconnect-type clutch transmission function.

3. according to the method described in claim 1, wherein the desired face of fluid torque converter torque is based on the driver It is required that torque.

4. according to the method described in claim 1, wherein the DISG speed is adjusted by adjusting DISG torque.

5. according to the method described in claim 1, wherein further comprising being estimated based on power train disconnect-type clutch active force The power train disconnect-type clutch torque.

6. according to the method described in claim 1, further including running institute when adjusting the DISG speed with speed control mode State DISG.

7. a kind of method of operation of hybrid vehicle power train, comprising:

After opening the torque converter clutch, it is with speed control mode operation power train integrated actuating machine/generator DISG；

As desired face of fluid torque converter speed, transformer turbine speed and the power train disconnect-type clutch of estimation The function of torque adjusts DISG speed, while increasing disconnect-type clutch pressure, wherein via power train disconnect-type clutch letter Number estimates the power train disconnect-type clutch torque of the estimation；

Torque output is adjusted in response to DISG during increasing the disconnect-type clutch pressure and is adjusted the power train and is separated Formula clutch transmission function；And

8. according to the method described in claim 7, wherein response power train disconnect-type clutch application of force is partly closed transmission It is disconnect-type clutch, and wherein estimates that power train disconnect-type clutch turns according to power train disconnect-type clutch application of force Square.