CN103723149B

CN103723149B - Method and system for vehicle transmission system power output device

Info

Publication number: CN103723149B
Application number: CN201310481301.6A
Authority: CN
Inventors: A·O`C·吉布森; G·M·皮尔特伦; 藤井雄二; J·A·多尔因; J·W·L·麦克卡莱姆
Original assignee: Ford Global Technologies LLC
Current assignee: Ford Global Technologies LLC
Priority date: 2012-10-15
Filing date: 2013-10-15
Publication date: 2018-10-30
Anticipated expiration: 2033-10-15
Also published as: CN103723149A

Abstract

The invention discloses the system and method for improving power output device.It in one example, can two different direction rotary power output devices.This method can improve the operating of power output device.

Description

Method and system for vehicle transmission system power output device

【Technical field】

The present invention relates to the power output device for improving vehicle（PTO, power take off）Operating system and side Method.This method may be particularly useful to the engine for being selectively connected to motor and speed changer.

【Background technology】

Power from engine is usually transmitted to wheel to promote vehicle.Extraly, engine power can be used for driving The vehicle accessory of dynamic auxiliary such as air-conditioning and alternating current generator.However, some vehicles include being located at engine in vehicle transmission system Power output port between wheel.Power output device can be outside vehicle device or may not be integrated into typical The power source of the device of coach.For example, power output port can drive the hydraulic pump for rising Snow shoveling device or rotation coagulation The hydraulic motor of native blender.However, typical power output port is limited to rotate in a single direction.In addition, when using The wheel torque for being provided to power train may be reduced when some PTO units.

【Invention content】

Inventor have realized that herein disadvantages mentioned above and developed it is a kind of operating PTO method, including：With first Direction rotates PTO power source and rotates PTO outputs；And with different from the second direction of first direction rotate PTO power source and PTO outputs are reversely rotated, PTO power source is arranged in vehicle transmission system.

The starter generator integrated by power train（DISG）PTO outputs are provided power to, even if there are PTO loads Reversed PTO outputs can be provided and meet the wheel torque of desired vehicle torque.For example, detaching clutch by power train DISG and engine are disconnected, the PTO output rotations of forward and reverse can be provided.Extraly, when setting in DISG and Can provide additional torque to vehicle transmission system when driveline clutch between engine is closed, when currently operating PTO makes It obtains actual wheel torque and is matched with desired wheel torque.

According to the present invention, a kind of method of operating PTO is provided, including：By rotating the first PTO power source and the 2nd PTO Power source and rotate PTO outputs, the first PTO power source and the second PTO power source provide positive-torque to vehicle transmission system；And it rings The output in the first PTO power source and the second PTO power source should be changed in the available output in the second PTO power source.

According to one embodiment of present invention, the first PTO power source is engine, and the second PTO power source is DISG.

According to one embodiment of present invention, it is arranged in power train between the first PTO power source and the second power source Power train separation clutch is in closed state.

According to one embodiment of present invention, further include in response to the wheel torque less than desired wheel torque and Adjust the output in the first PTO power source.

According to one embodiment of present invention, further include in response to the wheel torque less than desired wheel torque and Adjust the output in the second PTO power source.

According to one embodiment of present invention, it further includes and opens power train separation when PTO is rotated with second direction Clutch and when PTO is rotated with first direction open or be closed power train detach clutch.

According to one embodiment of present invention, it further includes in response to battery SOC and terminates the first PTO power of operating Source.

According to one embodiment of present invention, it further includes by adjusting the positive-torque that the first PTO power source provides Adjust the rotating speed of PTO outputs.

According to one embodiment of present invention, it further includes by adjusting the positive-torque that the second PTO power source provides Adjust the rotating speed of PTO outputs.

According to one embodiment of present invention, the first PTO power source is DISG, and the second PTO power source is engine, and And DISG is arranged in power train between speed changer and engine.

The present invention can provide multiple advantages.Specifically, this method can improve the function of PTO.In addition, this method can be with Improve the cornering ability of vehicle during PTO is operated.Further, this method, which can improve to the PTO of driver, operates communication.

Individually or it is read in conjunction with the figure following specific implementation mode, above-mentioned advantage of the invention and further advantage and spy Sign will become obvious.

It is used to introduce a series of principles in simplified form it should be understood that providing above-mentioned summary, it will in a specific embodiment It is further described below.This is not meant to the key or inner characteristic that identify theme claimed, claimed The range of theme is uniquely determined by claims.In addition, theme claimed is not limited to solve above or sheet The embodiment for the shortcomings that arbitrary portion is previously mentioned in specification.

【Description of the drawings】

Fig. 1 is the schematic diagram of engine；

Fig. 2 shows the first exemplary vehicle transmission system configuration；

Fig. 3 shows the second exemplary vehicle transmission system configuration；

Fig. 4 is the first part of the flow chart for the power train for controlling hybrid vehicle；

Fig. 5 is the second part of the flow chart for the power train for controlling hybrid vehicle；

Fig. 6 is the Part III of the flow chart for the power train for controlling hybrid vehicle；

Fig. 7 is the Part IV of the flow chart for the power train for controlling hybrid vehicle；

Fig. 8 is the Part V of the flow chart for the power train for controlling hybrid vehicle；

Fig. 9 is the Part VI of the flow chart for the power train for controlling hybrid vehicle；

Figure 10 is the Part VII of the flow chart for the power train for controlling hybrid vehicle；

Figure 11 is the anticipation exemplary sequence for operating the vehicle for including PTO；

Figure 12 is that operating includes 4x4 low gear range modes（low gear range mode）The anticipation of vehicle show Example sequence；And

Figure 13 is in response to operate the anticipation exemplary sequence of vehicle in track.

【Specific implementation mode】

The present invention relates to the power trains of control hybrid vehicle.As Fig. 1-3 hybrid vehicles shown may include Engine and motor.During vehicle operation can by or by power train integrate starter/generator（DISG）Fortune Forward motivation.DISG is integrated in power train with engine crankshaft on the same axis and when rotating converter pump Rotation.In addition, DISG selectively can not be engaged or detach with power train.Certainly, DISG is the necessary parts of power train.More It is possible to further engine operating or it is inoperative when operate DISG.When DISG is inoperative to provide or absorb from power train The quality of DISG and inertia belong to power train when torque.The method that can be shown according to Fig. 4-10 operates vehicle transmission system.Figure 11-13 It shows and sequence is operated according to the example vehicle of Fig. 4-10 methods shown.

With reference to figure 1, internal combustion engine 10 includes multiple cylinders, and the cylinder of display in Fig. 1 is started by electronics Machine controller 12 controls.Engine 10 includes that combustion chamber 30 and piston 36 are located therein and are connected to the cylinder wall 32 of bent axle 40. Flywheel 97 and ring gear 99 are connected to bent axle 40.Starter 96 includes pinion shaft 98 and pinion gear 95.Pinion shaft 98 can To selectively propel pinion gear 95 to engage ring gear 99.Starter 96 can be directly mounted on before engine or hair Behind motivation.In some instances, starter 96 can selectively provide torque to bent axle 40 by band or chain.Show at one In example, when not engaged with engine crankshaft, starter 96 is in normal condition.Combustion chamber 30 is shown as passing through inlet valve respectively 52 and exhaust valve 54 be connected to inlet manifold 44 and exhaust manifold 48.It can be operated often by vigor cam 51 and exhaust cam 53 A air inlet and exhaust valve.The position of admission cam 51 can be determined by admission cam sensor 55.The position of exhaust cam 53 It can be determined by exhaust cam sensor 57.

Fuel injector 66 is shown as being arranged to inject fuel directly into combustion cylinder 30, those skilled in that art Referred to as directly spray.Alternatively, fuel injection to air intake duct, those skilled in the art can be referred to as to air intake duct spray It penetrates.The pulse width of the fuel injector 66 and signal FPW from controller 12 proportionally transmits fuel.Fuel passes through fuel System（It is not shown）It is transported to fuel injector 66, the fuel system includes fuel tank, petrolift and fuel rail（Do not show Go out）.Fuel injector 66 provides operating current from the driver 68 in response to controller 12.In addition, inlet manifold 44 is shown as It is connected to the electronic throttle 62 of the optional position for adjusting choke block 64 and flows to air inlet discrimination from air inlet 42 to control air Pipe 44.In one example, it can use the direct spraying system of low pressure, wherein fuel pressure that can be promoted to about 20-30bar. Alternatively, high pressure, duplex fuel system can be used for generating higher fuel pressure.In some instances, air throttle 62 and section Flowing plate 64 can be arranged between inlet valve 52 and inlet manifold 44 so that air throttle 62 is port throttle.

Distributorless ignition system 88 provides pilot spark by spark plug 92 in response to controller 12 to combustion chamber 30.It is logical With or wide area exhaust oxygen (UEGO) sensor 126 be shown as connected to the exhaust manifold 48 of 70 upstream of catalytic converter.It is alternative Ground can replace UEGO sensor 126 with bifurcation exhaust gas oxygen sensor.

Wheel braking can be provided when with foot 152 with brake pedal 150 or via the regenerative braking of DISG.Braking Device pedal sensor 154 provides the signal of instruction brake pedal position to controller 12.It is assisted by brake booster 140 152 auxiliary foot application vehicle brake of device.

In one example, converter 70 may include multiple catalyst bricks.In another example, multiple discharges can be used Control device, each of which have multiple bricks.Converter 70 can be three-way catalyst in one example.

Controller 12 is shown as conventional microcomputer in Fig. 1, including：Microprocessor unit 102, input/output terminal Mouth 104, random access memory 108, does not fail at read-only memory 106（keep alive）Memory 110 and routine data are total Line.Controller 12 is shown as receiving the various signals from the sensor for being connected to engine 10, in addition to those discussed above Signal further includes：Engine coolant temperature from the temperature sensor 112 for being connected to cooling cover 114（ECT）；Connection It is used to incude the signal of the position sensor 134 of 132 application of force of foot to accelerator pedal 130；From being connected to inlet manifold 44 The engine manifold pressure of pressure sensor 122（MAP）Measured value；Carry out the hall effect sensor of 40 position of self-induction bent axle 118 engine position sensor signal；The measured value of the air quality into engine from sensor 120；Carry out autobiography The measured value of the throttle position of sensor 58.Also it can incude atmospheric pressure（Sensor is not shown）For being handled by controller 12. In the optimization of the present invention, engine position sensor 118 generates the equi-spaced pulses for subscribing number when bent axle each rotates, Engine speed is can determine according to it（RPM）.

In some instances, as the engines in hybrid vehicle shown of Fig. 2 and 3 can be connected to electro-motor/electricity Cell system.In addition, in some instances, other engine configurations, such as diesel engine can be used.

During operation, each cylinder in engine 10 is usually subjected to four-stroke cycle：Cycle includes induction stroke, pressure Contracting stroke, expansion stroke and exhaust stroke.In the intake stroke, usual exhaust valve 54 is closed and inlet valve 52 is opened.Air is logical 44 flowing in combustion chamber 30 of inlet manifold is crossed, and piston 36 is moved to the bottom of cylinder to increase the volume in combustion chamber 30. Those skilled in the art are usually by piston 36 close to the bottom of cylinder and in the terminal of its stroke（Such as at combustion chamber 30 When maximum volume）Location is known as lower dead center（BDC）.In compression stroke, inlet valve 52 and exhaust valve 54 are closed.It is living Plug 36 to cylinder top movements so as to the air in compression and combustion room 30.Piston 36 is in its stroke by those skilled in the art Terminal and when close to the top of cylinder（Such as when combustion chamber 30 is in minimum volume）Location is known as top dead centre （TDC）.During hereinafter referred to as spraying, combustion chamber is introduced the fuel into.During hereinafter referred to as lighting a fire, by known Sparking mode such as spark plug 92 light the fuel of injection and cause to burn.In expansion stroke, the gas of expansion is by piston 36 Push back to lower dead center.The movement of piston is converted to the rotation torque of rotary shaft by bent axle 40.Finally, during exhaust process, row Valve 54 is opened discharging burned air fuel mixture to exhaust manifold 48, and piston returns to top dead centre.It needs It is pointed out that and is described merely as embodiment above, and the opening and/or closure timings of changeable inlet valve, exhaust valve, such as with Positive valve overlapping or negative valve overlap are provided, postpone IC Intake Valve Closes or various other embodiments.

Fig. 2 is the block diagram of vehicle transmission system 200.Power train 200 can be driven by engine 10.It can be aobvious by Fig. 1 The engine starting system shown starts engine 10 via DISG240.In addition, engine 10 can pass through torque drivers 204（Such as fuel injector, air throttle etc.）Generate or adjust torque.

Engine output torque can be transmitted to the input side of double mass flywheel 232.Engine speed and double quality fly Wheel input side position and rotating speed can be determined by engine position sensor 118.Double mass flywheel 232 may include spring and Independent quality（It does not show）For inhibiting driveline torque to disturb.The outlet side of double mass flywheel 232 is shown as being mechanically attached to Detach the input side of clutch 236.It can electrically or hydraulically drive separation clutch 236.The setting of position sensor 234 exists To incude output position and the rotating speed of double mass flywheel 232 on the separation clutch side of double mass flywheel 232.Detach clutch 236 downstream side is shown as being mechanically attached to DISG input shafts 237.

DISG240 can be operated to provide torque to power train 200 or be converted to driveline torque and be stored in electric energy Electric energy in storage device 275.The starter 96 shown in DISG240 ratios Fig. 1 has higher output power capacity（power capacity）.In addition, it is 200 to directly drive that DISG240, which directly drives power train 200 or is transmitted,.Without band, gear or DISG240 is connected to power train 200 by chain.But DISG240 is rotated with power train 200 with identical rate.Power storage fills It can be battery, capacitor or inductor to set 275.The downstream side of DISG240 is mechanically attached to torque-converters 206 via axis 241 Pump impeller 285.The upstream side of DISG240 is mechanically attached to separation clutch 236.Torque-converters 206 includes input torque to input shaft 270 turbine 286.Torque-converters 206 is mechanically connected to automatic transmission 208 by input 270.Torque-converters 206 may include to incite somebody to action The power transmission device of the mechanical load 252 of driveline torque directed outwards or auxiliary（PTO）.PTO251 can be located at torque-converters Pump impeller side or torque-converters turbo-side.In some instances, PTO may include in automatic transmission 208.PTO251 is also It may include reverse gear 287.

Torque-converters 206 further includes torque-converters bypass lock-up clutch（TCC）212.When TCC is locked, torque is from pump impeller 285 It is directly transferred to turbine 286.Pass through 12 electric operating TCC of controller.It alternatively, can be with hydraulic locking TCC.In an example In, torque-converters can refer to the component of speed changer.Torque converter turbine rotating speed and position can be determined by position sensor 239.One In a little examples, 238 and/or 239 can be torque sensors or can be knockdown position and torque sensor.

When torque converter lock-up clutch 212 is kept completely separate, torque-converters 206 passes through torque converter turbine 286 and torque converter pump Fluid between wheel 285 is transmitted is transmitted to automatic transmission 208 by engine torque, so as to amplify torque.On the contrary, working as bending moment When device lock-up clutch 212 is fully engaged, engine output torque is directly transferred to by speed changer 208 by converter clutch Input shaft 270.Alternatively, torque converter lock-up clutch 212 can be partly engaged, speed change is directly transferred to so as to adjust The torque capacity of device.Controller 12 is configurable to by response to multiple engine operating conditions or being based on driver's （driver-based）Engine operating asks and adjusts the torque capacity transmitted by speed changer 212.

Mechanical load 252 can be the hydraulic pump for operating Snow shoveling device rise or truck mixer.Alternatively, machinery is negative It can be the mechanical device rotated to carry 252.Mechanical load controller 253 can be communicated by communication connection 291 with controller 12 To provide position, rotating speed and the torque information of mechanical load 252 via sensor 254.Sensor 254 provides position and rotating speed letter Breath to the mechanical load controller 253 that can correspondingly transmit information to controller 12 allows to control PTO.

Automatic transmission 208 includes gear clutch（Such as gear 1-6）211 and forward clutch 210.It can be selective Ground engages gear clutch 211 and forward clutch 210 to promote vehicle.From automatic transmission 208 torque output to Trailing wheel 216 can be transmitted to via output shaft 260 to promote vehicle.Specifically, output driving torque be transmitted to trailing wheel 216 it Preceding automatic transmission 208 can at input shaft 270 transmission response in the input driving torque of traveling state of vehicle.Torque may be used also With via 261 guide front wheel 217 of transfer gear.

In addition, wheel 216 can also be applied a frictional force to by engaging wheel drag 218.In one example, it responds In driver brake pedal is jammed on his foot（It does not show）And wheel drag 218 can be engaged.In other examples, it controls Device 12 processed or the controller for being connected to controller 12 can be applied engaging wheel drag.Equally, in response to driver by his Foot discharges and can be decreased to by detaching wheel drag 218 frictional force of wheel 216 from brake pedal.In addition, conduct A part for engine automatic stop program, vehicle brake can apply a frictional force to wheel 216 via controller 12.

Mechanical oil pump 214 can be in fluid communication with automatic transmission 208 engages multiple speed changers to provide hydraulic pressure, Such as forward clutch 210, gear clutch 211 and/or torque converter lock-up clutch 212.For example, mechanical oil pump 214 can be with It is operated, and can be driven via input shaft 241 by the rotation of engine or DISG according to torque-converters 206.To machinery The hydraulic pressure generated in oil pump 214 can increase with the increase of engine speed and/or DISG rotating speeds, and can be with hair The reduction of motivation rotating speed and/or DISG rotating speeds and reduce.

Controller 12 is configurable to the input from engine 10 received as shown in more detail in Fig. 1 and correspondingly controls The torque of engine processed exports and/or the operating of torque-converters, speed changer, DISG, clutch and/or brake.Show as one Example can be inflated by adjusting spark timing, fuel pulse width, fuel impulse timing and/or air（By controlling air throttle Aperture and/or valve timing, valve stroke）And the supercharging for turbine or mechanically-sapercharged engine combination and control and start Machine torque exports.In the case of diesel engines, controller 12 can be by controlling fuel pulse width, fuel impulse timing It is exported with air ventilating control engine torque.It, can be by cylinder basis in the case of all（cylinder-by-cylinder basis）Upper execution engine control is to control engine torque output.As it is known in the art that high temperature that controller 12 can be with By adjusting flow direction or flowing from the magnetic field of DISG（field）And/or armature winding electric current and control DISG generation torque it is defeated Go out and electric energy.

When meeting idle stop（idle-stop）When situation, controller 12 can by stop to engine fuel and Spark and initiate engine stop.However, engine can continue to rotate in some instances.In addition, in order to maintain speed changer In a certain amount of torque, the rotary part of speed changer 208 can be fixed on the shell 259 of speed changer and thereby solid by controller 12 It is scheduled on vehicle frame.Particularly, such as United States Patent (USP)（Application No. is 12/833788, entitled " control self-braking can be started The method of machine " is incorporated herein by reference in its entirety and is used for intentional and purpose）Description, controller 12 can engage One or more transmission clutch（Such as forward clutch 210）, and the transmission clutch being engaged by locking is to speed changer Shell 259 and vehicle frame.It can change（Such as increase）The pressure of transmission clutch is to adjust connecing for transmission clutch Conjunction state, and desired transmission torque is provided.

It is also based on transmission clutch pressure between engine shut-down and adjusts wheel brake pressure with logical in reduction Secondary locking when crossing the torque of wheel transmission（tie up）Speed changer.Specifically, when the speed changer of the one or more engagements of locking By applying wheel drag 218 when clutch, opposite power can be applied on speed changer, and be therefore applied to power train On, to keep transmission gear to have the initiative the potential rotating energy in engagement and transmission gear train, without locomotive Wheel.In one example, wheel brake pressure can be adjusted between engine shut-down to coordinate the application of vehicle brake With the locking of the transmission clutch of engagement.In this way, by adjusting wheel brake pressure and clutch pressure, when engine stops The amount of torque retained in speed changer can be adjusted when machine.When satisfaction restarts situation and/or vehicle driver wants to start vehicle When, controller 12 can by restore combusted cylinder restart engine.

Referring now to Figure 3, showing that the second example vehicle power train configures.Have with the element in Fig. 2 in power train 300 The element of identical label is identical element and by the operating described in Fig. 2.So for purposes of brevity, dispense Fig. 2 and The description of general element between Fig. 3.The description of Fig. 3 is limited to the element different from element in Fig. 2.

Power train 300 includes double clutch-twin countershaft transmission 308.Speed changer 308 is substantially the hand of automatic operating Dynamic speed changer.Controller 12 operates first clutch 310, second clutch 314, and mobile mechanism 315 is in gear（Such as 1- 5 gears）It is selected between 317.First clutch 310 and second clutch 314 can be selectively opened and closed in gear 317 Between shift gears.Torque is transmitted to wheel 216 by output shaft 260 from speed changer 308.

Referring now to Figure 4, showing the flow chart of the exemplary method of the power train for controlling hybrid vehicle.Fig. 4 In the non-transient memorizer of controller 12 that can be shown in the system of Fig. 1-3 of method in be stored as executable instruction.

At 401, method 400 determines vehicle working condition.Vehicle working condition may include but be not limited to speed, brake pedal position It sets, engine speed, engine load, 4x4 selection modes, 4x2 selection modes, vehicle chassis information（Such as analysis of wheel vertical fortune Turn, yaw, jolt and waves）And the track gradient.Method 400 advances to 402 after determining vehicle working condition.

At 402, method 400 judges whether to receive to PTO to operate to ask.Can by vehicle driver or in Fig. 1-3 The peripheral control unit that the powertrain controller 12 of display communicates makes PTO operating requests.PTO operating request instructions are wished Power is received from engine 10 and/or motor 240 to external loading.If PTO operating requests have been made in the judgement of method 400, Method 400 advances to the 412 of Fig. 5 if answer is to be.Otherwise, method is that otherwise method 400 advances to 403.

Referring now to Figure 5, method 400 judge at 412 PTO operating request be for vehicle parking still-mode or The transportable non-silent mode of vehicle.Still-mode is useful for the external loading that need not be moved.Static In pattern, when vehicle stops and/or parks, PTO rotating speeds can ask as via from external loading device（Such as hydraulic pump Controller）Control instruction or driver input fixed rotating speed（Such as 540RPM））.In non-silent mode, PTO rotating speeds can It can change with engine/motor rotating speed and speed.To which torque can be provided to PTO and provide the motive power of vehicle.If Method 400 judge request still-mode, answer be that method 400 advances to 413.Otherwise, answer is advanced for otherwise method 400 To 424.

At 413, method 400 judges whether to select pure DISG or motor PTO mode.In pure DISG or motor PTO mode In, only by DISG rather than engine to PTO provide torque.This operating allows PTO with reversed and Positive work.If side Method 400 judges to select the PTO mode of pure DISG, answer be that method 400 advances to 414.Otherwise, answer is otherwise method 400 advance to the 434 of Fig. 6.

At 434, method 400 is closed power train separation clutch and engine and DISG is mechanically coupled together. Engine or DISG can be selectively deactivated when driveline clutch is closed.It is closed after detaching clutch before method 400 Proceed to 435.

At 435, method 400 judges whether engine output is higher than the threshold torque range of threshold torque level or can replace Within its scope for ground.If engine output torque is higher than threshold torque range or within, before answer is method 400 if being Proceed to 437.Otherwise, answer is that otherwise method advances to 436.For example, if engine torque is 100 Nms（N-m）, threshold value Torque range is ± 10N-m, and threshold torque is 108N-m, then answer be that method 400 advances to 437.

At 437, method 400 adjusts engine torque and DISG torques to provide desired PTO rotating speeds.In an example In, engine loading is adjusted to threshold level（Such as the 90% of maximum engine torque）And subsequent DISG output torques increase To the level of PTO rotating speeds desired by offer.If DISG output torques are less than desired PTO in maximum horizontal and PTO rotating speeds Rotating speed, engine torque can increase to maximum horizontal at current PTO rotating speeds.Method after adjusting engine and DISG torques 400 advance to the 404 of Fig. 4.

In other examples, work as battery charge state（SOC）Higher than threshold level, DISG can be with before enabling engine Output torque is to threshold level.In addition, being turned round when PTO is less than the output of available engine in still-mode and PTO torque demands Engine with charging vehicle battery and can provide electrical power to the electric network of vehicle when square.To which engine can drive PTO same When DISG engine torque is converted into electric energy with charging vehicle battery.

At 436, method 400 adjusts engine torque to provide desired PTO rotating speeds while deactivate DISG.It is alternative Ground, DISG may be at providing current to the power generation mode of Vehicular battery at 436.PTO rotating speeds desired by determination can be passed through The controller 12 of error between actual PTO rotating speeds keeps PTO rotating speeds.If actual PTO rotating speeds are less than desired PTO Rotating speed can further open engine air throttle to increase engine torque, to increase PTO rotating speeds.If actual PTO Rotating speed is higher than desired PTO rotating speeds, can pass through multiple drivers（Such as air throttle, cam timing, waste gate, fuel injection Device, spark timing etc.）At least one of reduce engine torque, to reduce PTO rotating speeds.Adjust the rear of engine torque Method 400 advances to the 404 of Fig. 4.

Fig. 5 is now turned to, judges battery charge state in 414 prescription methods 400（SOC）Whether threshold level is higher than.One In a example, threshold state of charge can be estimated by measuring cell voltage.If battery charge is higher than threshold level, answer is It is that method 400 advances to 417.Otherwise, answer is that otherwise method 400 advances to 415.In one example, the charged shape of threshold value State is the minimum charge level for not occurring deterioration of battery.

At 415, method 400 indicates that imminent DISG is shut down.It can be referred to by light, display panel or voice actuator Show that DISG is shut down.Imminent shutdown is provided when the threshold value charge level that can be mentioned at battery charge state is higher than 414 Instruction.Alternatively, engine can be started automatically when battery charge is decreased to threshold level and PTO remains in operation.

At 416, method 400 stops providing torque to PTO by DISG.It can ramp down in a controlled fashion（ramp down）DISG torques rapidly change to avoid PTO torques.Method 400 advances to the 404 of Fig. 4.

At 417, method 400 opens power train and detaches clutch.The power train separation clutch of opening automatically will hair Motivation is detached from DISG.To which DISG can provide torque to PTO without due to rotating the air-fuel mixture that do not burn Engine caused by loss.Since PTO is in still-mode, PTO is transmitted to by the DISG most of torques provided.It opens Method 400 advances to 418 after separation clutch.

At 418, method 400 and mechanical load controller（Such as 253 in Fig. 2）Exchange control signal.Mechanical load Controller can control PTO and engine to provide desired PTO outputs.Alternatively, mechanical load controller can receive Instruction from powertrain controller simultaneously provides control information to powertrain controller from sensor.In machinery The example signal exchanged between load controller and powertrain controller includes but is not limited to PTO rotating speeds, PTO unit position It sets（Such as actuator（Ball-screw）Position）, PTO engagement signals, PTO separation signal, PTO unit stroke end, PTO rotation Turn direction and PTO stop signals.Method after exchange signal between mechanical load controller and powertrain controller 400 advance to 419.

At 419, method 400 judges whether that reversed PTO is asked to rotate.Driver or controller can be passed through（Such as machine Tool load controller）Reversed PTO is asked to rotate.If method 400 judges the request of antiport occur, answer be if side Method 400 advances to 420.If method 400 judges the request for not occurring reversely rotating, answer is no（PTO is to rotate in the forward direction） Then method 400 advances to 421.

At 420, rotation DISG makes PTO reversely rotate.It can be provided by the reverse gear being integrated in PTO unit anti- To PTO rotation.Reverse gear can be selectively engaged.Alternatively, it can be reversed rotation DISG and make PTO reversely to revolve Then reverse gear is not needed.It can be applied on DISG by reversal connection in some configurations by electronic rectifier or alternatively Electric power and reversed DISG rotations are provided.

At 421, method 400 is with desired rotation speed operation DISG and PTO.In one example, turned according to actual PTO Speed control DISG rotating speeds.For example, actual PTO rotating speeds can be subtracted from desired PTO rotating speeds to provide PTO speed errors.Then The electric current being applied on DISG can be adjusted to adjust DISG torques between actual PTO rotating speeds and desired PTO rotating speeds Zero error is provided.If actual PTO rotating speeds are less than desired PTO rotating speeds, DISG electric currents can be increased.Alternatively, depend on It is designed in DISG, the frequency for the electric power for being provided to DISG can be adjusted to adjust DISG torques.It adjusts DISG rotating speeds and hope is provided PTO rotating speeds after method 400 advance to 422.

At 422, method 400 judges whether the device of PTO operatings is in the limit.In one example, the dress of PTO operatings It can be the ball-screw with start of a run and stroke end limit switch to set.If the device of PTO operatings is in stroke pole Limit, answer be that method 400 advances to 423.Otherwise, answer is that otherwise method 400 advances to the 404 of Fig. 4.

At 423, method 400 stops DISG and PTO rotations.With pre- if the device that PTO is operated reaches capacity situation Fixed rate ramp reduces（ramp down）DISG and PTO rotations.It can be inputted in a reverse direction by driver or controller Restart DISG.It is moved between two extreme positions in this way, the device that DISG and PTO so that PTO is operated can be operated.It terminates Method 400 advances to 404 in Fig. 4 after DISG rotations.

At 424, method judges whether battery charge state is higher than threshold state of charge.If battery charge state is higher than Threshold level, answer be that method advances to 427.Otherwise, answer is otherwise method 400 to 425.Threshold state of charge helps Ensure that enough electric power can be provided to DISG to continue to rotate PTO.

At 425, if the method 400 that engine is off enables engine.Hair can be enabled by starting engine Motivation.In one example, it can be rotated by DISG when detaching clutch engagement and extremely be sent out via offer air, spark and fuel Motivation and start engine.Method 400 advances to 426 after enabling engine.

At 426, method 400 stops providing positive-torque via DISG（Such as the torque of rotary drive train）.However, DISG Electric energy can be provided to Vehicular battery by power train rotational energy is converted to electric energy.Reduced DISG positive outputs torque it Method 400 advances to 427 afterwards.

At 427, method 400 judges whether DISG can provide the additional of desired wheel torque amount and rotation PTO Preset torque amount.In one example, retaining can use the 25% of DISG torques to be operated for PTO.For example, if DISG is in its base Torque output capacity with 100N-m at quasi- rotating speed rotating speed below, the DISG torques that can provide 75N-m generate wheel torsion Square.Retain remaining 25N-m for providing PTO torques.However, if it is desired to wheel torque it is relatively low, PTO can be received up to 75% available DISG output torques.Can by by accelerator pedal position input by pedal position be converted to desired pump impeller, Turbine, speed changer output or the looking into value function or table of wheel torque and determine desired wheel torque.Then by desired torque Compared with available DISG torques.Available DISG torques can store to be turned by battery charge state or DISG in memory Speed index is looked into value table.If available DISG torques wish that the DISG torques of torque, answer are method if being higher than generating 400 advance to 432.Otherwise, answer is that otherwise method 400 advances to 428.Note that the shape appropriate depending on desired torque Desired torque can be converted to desired DISG torques by formula by considering that transmission ratio and speed changer are lost.

At 428, method 400 is closed separation clutch.Separation clutch is closed by engine torque to increase The torque provided by DISG.In addition, if engine also not running then starts engine.In this way, when PTO operatings and vehicle shifting It can be combined with wheel torque desired by offer with engine torque by the DISG torques provided when dynamic.It is closed separation clutch And method 400 advances to 429 after starting engine.

In the case that method 400 judges that no DISG provides positive-torque to power train at 429, engine individually whether Torque capacity with wheel torque desired by offer and the additional preset torque amount for rotating PTO.In one example, may be used Desired wheel torque is converted into desired engine torque by considering variator and loss.In an example In, retain 25% available engine torque and is operated for PTO.For example, if engine has 200N-m's at specific rotation speeds Torque output capacity, the engine torque that can provide 150N-m generate wheel torque.Retain remaining 50N-m for providing PTO torques.However, if it is desired to wheel torque it is relatively low, PTO can receive up to 75% available engine output torque.? In one example, it would be desirable to wheel torque compared with available engine torque.Available engine torque can be stored in By engine speed index and with surrounding air Auto-regulating System of Density of Heavy Medium or based on the present situation and hardware capabilities in memory （hardware capability）What the model of place's maximum engine torque calculated in real time looks into value table.If available engine Torque higher than the engine torque for generating desired wheel torque, answer be that method 400 advances to 430.Otherwise, answer is Otherwise method 400 advances to 431.Note that can be by considering that transmission ratio and speed changer are lost by desired wheel Torque is converted to desired engine torque.

At 430, when PTO currently drives external device (ED), method 400 adjusts engine torque to provide desired wheel Torque.The amount of engine torque of PTO is transmitted to due to may be unaware that in some instances, it may be determined that be provided to the torsion of PTO Square is simultaneously added to desired engine torque to provide desired wheel torque.It in one example, can be from following equation Determine the torque for being provided to PTO：

T_Pto=T_eng-Tc_mult·T_{gear_ratio}·T_{axle_ratio}·T_{driveline_losses}·F_Grade

Wherein T_wheelThe wheel torque being desirable to, T_engThe engine torque being desirable to, T_ptoIt is PTO torques, Tc_multIt is to become Square device magnifying power, T_{gear_ratio}It is current transmission ratio, Ta_{xle_ratio}It is driveaxle ratio（axle ratio）, T_{driveline_losses}It is the multiplier for reflecting power train and being lost, and F_GradeIt is the gradient for the road gradient for considering to determine via inclinometer Multiplier.The mapping graph for the engine torque that can be indexed by engine speed and load（map）The desired engine torque of estimation. Wheel torque can be estimated from following equation：

T_wheel=(T_eng-T_pto)·Tc_mult·T_{gear_ratio}·T_{axle_ratio}·T_{driveline_losses}·F_Grade

Torque-converters magnifying power, transmission ratio, axial ratio and driveline torque loss multiplier can be empirically determined and be based on Engine speed, speed, the transmission ratio of selection and other factors are from memory search.Vehicle mass can be changed and adjust vehicle Inertia.

If desired by the wheel torque of estimation is less than, desired engine can be increased by adjusting engine torque and turned round Square is to increase actual wheel torque to desired wheel torque.In this way, increasing not knowing the torque capacity of PTO consumption Add engine torque to provide desired wheel torque.Method 400 advances to 404 in Fig. 4.

At 431, when PTO currently drives external device (ED), method 400 adjusts engine torque and DISG torques to provide Desired wheel torque.In one example, the transmission gear based on speed and selection is with efficient operating mode running engine. If cannot get desired wheel torque at the operating mode, increase DISG output torques to provide desired wheel torque.If DISG has no ability to provide desired wheel torque under current PTO loads, is started with the adjusting of lower fuel efficiency operating mode Machine operating is to increase engine torque output.Increase DISG torques by being provided to the electric current of DISG by increasing.It is saved by adjusting Valve position, waste gate position, cam timing, fuel quantity and spark timing and adjust engine torque.In one example, when DISG can determine wheel torque when currently providing torque to power train according to following equation：

T_wheel=(T_eng-T_pto+T_DISG)·Tc_mult·T_{gear_ratio}·T_{axle_ratio}·T_{driveline_losses}·F_Grade

Wherein TDISG is the torque capacity of power train to be provided to by DISG, and other variables are in above description mistake.To, Engine torque and DISG torques can be adjusted to provide desired wheel torque under current PTO loads.Engine is adjusted to turn round Method 400 advances to 404 in Fig. 4 after square and DISG torques.

At 432, opens separation clutch and stop engine.It is deactivated that opening separation clutch so that DISG need not rotate Engine.Engine is deactivated to save fuel.Method 400 advances to 433 after opening separation clutch.

At 433, method 400 adjusts DISG torques by being provided to the electric current of DISG by adjusting.In one example, it adjusts DISG torques are saved to provide desired wheel torque in PTO passive transports.For example, if necessary to 15N-m wheel torque and PTO currently consumes 5N-m, and DISG torques are adjusted to 20N-m until vehicle is with there are the vehicles of 15N-m by increasing DISG torques Desired rate when torque is taken turns to accelerate.

Now turn to Fig. 4, method 400 at 403 by DISG by from engine rotating energy or vehicle energy turn It is changed to electric energy and storage battery.In some instances, battery charging can be postponed after PTO operatings until vehicle is in vehicle Kinetic energy can be exchanged into electric energy without fuel-air-fuel mixture to provide the deceleration conditions of electric energy or traveling of going down the hill.? In other examples, battery can be charged into threshold level by engine rotating energy is converted to electric energy.Once battery reaches To threshold level, the charging of additional battery can only be originated from vehicle energy.Method 400 advances to 404 after initiating battery charging.

At 404, method 400 judges whether 4x4 patterns（Such as four-wheel drive pattern）Request.Driving can be passed through Member or peripheral control unit（Such as the controller of induction wheel-slip）Make the request of 4x4 patterns.If method 400 judges occur The request of 4x4 patterns, answer be that method 400 advances to 407.Otherwise, answer is that otherwise method 400 advances to 405.One In a little examples, when vehicle be in two-wheel drive mode, driver selects high speed or low gear range 4 wheel driven method 400 oneself It is dynamic to start the engine stopped.

At 405, what method 400 judged whether to occur deteriorating（Such as it is coarse, bending（The frequency of road transformation）, It is smooth or blocking）Condition of road surface.In one example, can with vertical stroke wheel-based and the frequency vertically operated and Determine coarse road.Smooth road can be determined by the amount of wheel-slip.Optics, the radar sensor of sound wave can be passed through Detect the object of vehicle front choke the road.If there is coarse, bending, smooth or blocking road, answer is yes Then method 400 advances to the 450 of Fig. 7.Otherwise, answer is that otherwise method 400 advances to 406.

At 406, method 400 detaches clutch with automatic basic two-wheel drive mode running engine and power train. During two-wheel drive mode, DISG can be selectively connected to engine to provide wheel torsion by Vehicles separation clutch Square and charging vehicle battery and the electric network for providing electrical power to vehicle.In one example, when battery SOC is higher than threshold value SOC When in vehicle acceleration period DISG provide torque to vehicle transmission system.In addition, during vehicle deceleration and during descending situation DISG provides electric energy to Vehicular battery.Engine and DISG drive method 400 after mode situation operates according to basic two and return To 401.

Referring now to Figure 7, judging closing rate in 450 prescription methods 400（Such as vehicle is close to the rate of object）Whether compare First threshold closing rate is faster（Such as the shorter time between the contact between vehicle and object）Or the road like of deterioration Condition（Such as bending, smooth or coarse condition of road surface）Standard（Such as it represents and is bent, is smooth or rasping road situation Number）Whether first threshold condition of road surface standard volume is higher than.That is, method 400 judge whether to occur the road roughness of higher level, Curvature, smoothness or the higher rate close to object.If method 400 judges that condition of road surface standard is higher than first threshold road Road condition parameter, or if vehicle closing rate faster than the first vehicle threshold value closing rate, answer is if be before method 400 Proceed to 451.Otherwise, answer is that otherwise method 400 advances to 454.

At 451, method 400 terminates engine automatic stop and engine idling ready mode.Engine idling is ready Pattern is permission engine idling and power train separation clutch is in the open state and at the same time DISG provides torque to transmission The pattern of system.For example, method 400 can prevent engine automatic stop during vehicle deceleration or when the vehicle is stopped.Engine Be automatically stopped be by controller based on input initiate engine stop without by only have stop and/or start send out The driver of the purpose of motivation inputs the specific engine stop request provided.By terminating engine automatic stop, power Transmission system may be at better adapting to the state of the response to road and vehicle condition.For example,（Such as by engine and DISG's）Can obtain complete powertrain torque allows vehicle to overcome or accelerate to leave undesirable situation.This Outside, power train detaches clutch closure at 451 or remaining closed makes engine and DISG be rotated with phase same rate.Termination is started Method 400 advances to 452 after the rotational automatic stopping of machine.

At 452, method 400 judges whether engine currently stops rotating.It may determine that when engine speed is zero Engine stop rotates.If method 400 judge engine stop rotate, answer be that method 400 advances to 453.Otherwise, Answer is that otherwise method 400 advances to 454.

At 453, method 400 restarts engine so that it is ready for any action that driver may take.It can lead to It crosses closure power train separation clutch and spark and fuel is provided and start engine to engine.Restart the rear of engine Method 400 advances to 454.

At 454, method 400 judges whether closing rate is less than first threshold closing rate and more close than second threshold fast Rate is faster or condition of road surface（Such as smooth or coarse condition of road surface）Whether standard, which is less than first threshold condition of road surface, is joined It counts and is higher than second threshold condition of road surface parameter.Second threshold closing rate is less than first threshold closing rate.Second threshold road Road situation is less than first threshold condition of road surface.That is, method 400 judge whether to occur it is medium higher（mid-higher）Horizontal road Road roughness, curvature, smoothness or the medium higher rate close to object.If method 400 judges that condition of road surface is less than Moreover first threshold road like is higher than second threshold condition of road surface, or if vehicle closing rate connects less than the first vehicle threshold value Nearly rate and be higher than the second vehicle threshold value closing rate, answer be that method 400 advances to 455.Otherwise, answer is otherwise square Method 400 advances to 458.

At 455, method 400 is by opening power train and detaching clutch during lower wheel torque request situation Allow automatic engine output to be decreased to engine idling ready mode, but does not allow being automatically stopped for engine rotation. For example, at lower desired wheel torque, engine can be disconnected with DISG, and subsequently engine speed is decreased to idle Speed.Torque can be provided to power train by DISG.If wheel torque request increases, engine speed increases to DISG and turns Speed is subsequently closed power train and detaches clutch.In this way, when vehicle is in 4x2 operation modes during some situations method The ready state of 400 enhancing vehicles still allows to save by allowing engine idling operation with DISG synchronous rotaries Fuel.Method 400 advances to 456 after adjustment is automatically stopped situation.

At 456, method 400 judges whether engine currently stops rotating.It may determine that when engine speed is zero Engine stop rotates.If method 400 judge engine stop rotate, answer be that method 400 advances to 457.Otherwise, Answer is that otherwise method 400 advances to 458.

At 457, method 400 restarts engine to be ready for any action that driver may take.It can be by closing It closes power train separation clutch and spark and fuel is provided and start engine to engine.Restart method after engine 400 advance to 458.

At 458, method 400 judges whether closing rate is less than second threshold closing rate and more close than third threshold value fast Rate is faster or condition of road surface standard（Such as smooth or coarse condition of road surface）Whether it is less than second threshold condition of road surface to join It counts and is higher than third threshold value condition of road surface parameter.Third threshold value closing rate is less than（Such as the contact between vehicle and object it Between the longer period）Second threshold closing rate.Third threshold value condition of road surface parameter is joined less than second threshold condition of road surface Number.That is, method 400 judges whether the road roughness of medium level, curvature, smoothness or the middle constant speed close to object occur Rate.If method 400 judges that condition of road surface standard is less than second threshold condition of road surface parameter and is higher than third threshold value condition of road surface Whether parameter or vehicle closing rate are less than the second vehicle threshold value closing rate and are higher than third vehicle threshold value closing rate, Answer be that method 400 advances to 459.Otherwise, answer advances to 464 in Fig. 8 for otherwise method 400.

At 459, method 400 allows automatic engine stop to rotate to zero engine rotating speed.Work as wheel torque request Clutch can be detached when low by opening power train and engine speed is decreased to zero by termination to the The fuel stream of engine. DISG can continue to provide torque to vehicle transmission system to promote vehicle.In this way, be in two-wheel drive mode when vehicle rather than Method 400 allows further decreasing for fuel consumption when four-wheel drive pattern.Adjust the rear of automatic engine stop situation Method 400 advances to 464 in Fig. 8.

It should be mentioned that if necessary method 400 can use at 440,444,448,450,454 and 458 less than first, Second or third threshold value close to distance replace higher than the first, second or third threshold value closing rate.Alternatively, method 400 may determine that whether closing rate is higher than the first, second or third threshold value at 440,444,448,450,454 and 458, with And whether it is less than the first, second or third threshold value close to distance.

Referring now to Figure 8, judging whether closing rate is less than third threshold value closing rate or condition of road surface mark at 464 It is accurate（Such as represent number be bent, smooth or coarse condition of road surface）Whether third threshold value condition of road surface parameter is less than.That is, Method 400 judges whether the road roughness of reduced levels, curvature, smoothness or the relatively low rate close to object occur.Such as Fruit method 400 judges that condition of road surface standard is less than third threshold value condition of road surface parameter or vehicle close to less than third vehicle threshold Be worth closing rate parameter, answer be that method 400 advances to 465.Otherwise, answer is that otherwise method 400 is back in Fig. 4 401。

At 465, method 400 allows automatic engine stop to rotate to zero engine rotating speed.Work as wheel torque request Clutch can be detached when relatively low by opening power train and engine speed is decreased to zero by termination to the The fuel stream of engine. If wheel torque request increases, engine can be restarted by DISG or starter and power train separation clutch can be closed Device is to increase power train and wheel torque.When DISG and engine disconnect, it can continue to provide torque to system of vehicle transmission System is to promote vehicle.Adjust method 400 after automatic engine stop situation return in Fig. 4 401.

Referring now to Figure 4, judge whether to occur deteriorating in 407 prescription methods 400（Such as it is coarse, bending, smooth Or block）Condition of road surface.It can be by the determination condition of road surface and blocking described at 405.If there is it is coarse, bending, Smooth or blocking road, answer are to be, method 400 advances to the 440 of Fig. 7.Otherwise, answer is advanced for otherwise method 400 To 408.

Referring now to Figure 7, judging closing rate in 440 prescription methods 400（Such as vehicle is close to the rate of object）Whether compare First threshold closing rate is faster（Such as the shorter time between the contact between vehicle and object）Or condition of road surface（Example Such as bending, smooth or coarse condition of road surface）Whether standard is higher than first threshold condition of road surface standard volume.That is, method 400 Judge whether road roughness, curvature, the higher level of smoothness or the higher rate close to object occur.If method 400 judge that condition of road surface standard is higher than first threshold condition of road surface parameter, or if vehicle closing rate is faster than the first vehicle Threshold value closing rate, answer be that method 400 advances to 441.Otherwise, answer is that otherwise method 400 advances to 444.

First provided between 440 and 448 can be mentioned between 450 and 458 to third threshold value condition of road surface One is identical or different to third threshold value condition of road surface.Similarly, first mentioned between 440 and 448 is close to third threshold value It is provided between rate and 450 and 458 identical or different to first to third threshold value closing rate.

At 441, method 400 terminates engine automatic stop.For example, during vehicle deceleration or square when the vehicle is stopped Method 400 prevents engine automatic stop.Engine automatic stop is by controller is based on the engine stop for inputting initiation It need not be asked by only having the driver for the purpose for stopping and/or starting engine to input the specific engine stop provided It asks.By terminating engine automatic stop, power drive system may be at better conforming to the response to road and vehicle condition State.For example,（Such as pass through engine and DISG）Complete powertrain torque, which can be obtained, allows vehicle to overcome Or accelerate to leave undesirable situation.In addition, at 441 power train separation clutch be closed or remain closed so that engine with DISG is rotated with identical rate.Method 400 advances to 442 after terminating the rotational automatic stopping of engine.

At 442, method 400 judges whether engine has currently stopped rotating.It can be with when engine speed is zero Judge that engine stop rotates.If method 400 judge engine stop rotate, answer be that method 400 advances to 443. Otherwise, answer is that otherwise method 400 advances to 444.

At 443, method 400 restarts engine rotation to be ready for any action that driver may take.It can lead to It crosses closure power train separation clutch and spark and fuel is provided and start engine to engine.Restart the rear of engine Method 400 advances to 444.

At 444, method 400 judges whether closing rate is less than first threshold closing rate and is faster than second threshold and approaches Rate or condition of road surface（Such as smooth, bending or coarse condition of road surface）Whether standard is less than first threshold road Condition parameter and be higher than second threshold condition of road surface parameter.Second threshold closing rate is less than first threshold closing rate.Second Threshold value condition of road surface is less than first threshold condition of road surface.That is, method 400 judges whether to occur road roughness, curvature, smooth The medium higher level of degree or the medium higher rate close to object.If method 400 judges that condition of road surface is less than the first threshold Moreover it is worth road like and is higher than second threshold condition of road surface, or if vehicle closing rate is less than the first vehicle threshold value closing rate And be higher than the second vehicle threshold value closing rate, answer be that method 400 advances to 445.Otherwise, answer is otherwise method 400 Advance to 448.

At 445, method 400 is by opening power train and detaching clutch during lower wheel torque request situation Allow automatic engine output to be decreased to engine idling conditions, but does not allow being automatically stopped for engine rotation.For example, At lower desired wheel torque, engine can be disconnected with DISG, and subsequently engine speed is decreased to idling. Torque can be provided by DISG to power train.If wheel torque request increases, engine speed increases to DISG rotating speeds, then so It is closed power train afterwards and detaches clutch.In this way, method 400 increases during some situations during vehicle is in 4x4 operation modes The ready state of extra bus still allows to save fuel with DISG synchronous rotaries by allowing engine idling operation. Method 400 advances to 446 after adjustment is automatically stopped situation.

At 446, method 400 judges whether engine currently stops rotating.It may determine that when engine speed is zero Engine stop rotates.If method 400 judge engine rotation stop, answer be that method 400 advances to 447.Otherwise, Answer is that otherwise method 400 advances to 448.

At 447, method 400 restarts engine to be ready for any action that driver may take.It can be by closing It closes power train separation clutch and spark and fuel is provided and start engine to engine.Restart method after engine 400 advance to 448.

At 448, method 400 judges whether closing rate is less than second threshold closing rate and is faster than third threshold value and approaches Rate, or if condition of road surface standard（Such as smooth or coarse condition of road surface）Less than second threshold condition of road surface parameter And it is higher than third threshold value condition of road surface parameter.Third threshold value closing rate is less than second threshold closing rate（Such as vehicle and object The longer period between contact between body）.Third threshold value condition of road surface parameter is less than second threshold condition of road surface parameter. That is, method 400 judges whether the road roughness of medium level, curvature, smoothness or the middle constant speed close to object occur Rate.If method 400 judges that condition of road surface standard is less than second threshold condition of road surface parameter and is higher than third threshold value condition of road surface Parameter, or be less than the second vehicle threshold value closing rate if vehicle is close and be faster than third vehicle threshold value closing rate, answer To be, method 400 advances to 449.Otherwise, answer advances to 460 in Fig. 8 for otherwise method 400.

At 449, method 400 is by opening power train and detaching clutch during lower wheel torque request situation Allow automatic engine output to be decreased to engine idling conditions, but does not allow being automatically stopped for engine rotation.To, Compared with vehicle is in two-wheel drive mode operating, in response to can be influenced by vehicle and condition of road surface in four-wheel drive pattern Change driver's wheel torque instruction power train ready state higher.Method after adjustment engine automatic stop situation 400 advance to 460 in Fig. 8.

Referring now to Figure 8, judging whether engine rotation has stopped.If stopped, answer is method 400 if being Advance to 461.If do not stopped, answer is that otherwise method 400 advances to 461.

At 461, restart engine.It can be by providing spark and fuel to engine and using DISG or independent Motivation rotation starts engine and restarts engine.Method 400 advances to 462 after starting engine.

At 462, judge whether the closing rate of vehicle and object is less than third threshold value closing rate or condition of road surface Whether standard is less than third condition of road surface parameter.That is, method 400 judge whether to occur low-level road roughness, curvature, Smoothness or relatively low rate close to object.If method 400 judges that condition of road surface standard is less than third threshold value condition of road surface Parameter, or if vehicle closing rate be less than third vehicle threshold value closing rate parameter, answer be that method 400 advances to 463.Otherwise, answer returns to 408 in Fig. 4 for otherwise method 400.

At 463, method 400 allows engine automatic stop to rotate to zero engine rotating speed.When wheel torque request compared with Clutch can be detached when low by opening power train and terminating by fuel flows to engine makes engine speed be decreased to zero.If Wheel torque request increases, and can restart engine by DISG or starter and can be closed power train separation clutch To increase power train and wheel torque.When DISG and engine disconnect, it can continue to provide torque to vehicle transmission system To promote vehicle.Method 400 returns to the 408 of Fig. 4 after adjusting engine automatic stop situation.

Fig. 4 is now turned to, judges whether that request is used for low speed four-wheel drive at 408（Low speed 4x4）Pattern（four wheel drive low mode）Request.Low speed four-wheel drive pattern can be selected by driver or by controller.If It is to be that the judgement of method 400, which has selected low speed four-wheel drive pattern, answer, and method 400 advances to the 466 of Fig. 9.Otherwise, answer is Otherwise method 400 advances to 409.

Referring now to Figure 9, once it includes driver or controller release braking to adjust engine start situation in method 400 Device pedal or actuator then restart the engine to stop rotating.In addition, being closed separation clutch engine torque is provided To wheel.To when power train is in low gear range four-wheel drive（four wheel drive low range）When, it can To start engine automatically without driver by only having the function of the special input for starting and/or stopping engine It is specific to ask to restart engine.Compared with only DISG provides torque to wheel, engine is started if discharging brake Power train is allowed to increase vehicle torque.Engine is restarted after situation is adjusted to restart if discharging brake engine Method 400 advances to 467.

At 467, method 400 is instructed with vehicle in response to plan with high speed gear range four-wheel drive（four wheel drive high range）Or different torque-converters inputs command torque when two-wheel drive mode operating.For example, and vehicle It is compared with two-wheel drive or high speed gear range four-wheel drive, the DISG when vehicle is operated with low gear range four-wheel drive Different torque capacities can be contributed to converter pump with engine.Particularly, during low gear range four-wheel drive, when DISG can make vehicle than the wheel torque of engine offer greater percentage when desired wheel torque is less than threshold torque Can more smoothly it accelerate.On the contrary, during high speed gear range four-wheel drive, when desired wheel torque is identical less than this Threshold torque when engine can than DISG provide greater percentage wheel torque.

Extraly, compared with vehicle is operated with two-wheel drive or high speed gear range four-wheel drive, when vehicle is in low speed It can be started automatically at different operating modes when four-wheel drive pattern and stop engine without coming from driver's operation only With the input for starting and/or stopping the special input that engine rotates.For example, with two-wheel drive mode or high speed gear model It encloses four-wheel drive operating vehicle to compare, engine can continue with idle after vehicle stops movement when in low speed 4 wheel driven pattern Speed operates the longer period.The plan of torque-converters input torque and engine operation are adjusted for low gear range four-wheel drive Method 400 advances to 468 after plan.

At 468, when operating vehicle with low gear range four-wheel drive, method 400 instructs specific battery charge shape State threshold value can be automatically stopped engine at the battery charge state threshold value.In one example, when with low gear range Four-wheel drive can stop engine when operating vehicle after battery charge state reaches the first battery charge threshold value.In addition, When operating vehicle with two-wheel drive or high speed gear range four-wheel drive, the second battery lotus can be reached in battery charge state Stop engine after electric threshold value, the second battery charge threshold value is less than the first battery charge threshold value.When vehicle is in low gear Engine can be automatically stopped when range four-wheel drive after battery charge state reaches higher level to allow to mitigate separation Clutch engages and the number of separation is to reduce separation clutch deterioration.When not with low gear range four-wheel drive transiting vehicle When, stop engine rotation at lower battery charge state and allow to consume less fuel to carry out rechargeable battery.

In addition, with high speed gear range four-wheel drive or two-wheel drive mode operating vehicle compared with, and with low speed Gear range four-wheel drive operating vehicle compare, at 468 can according to different plans be closed and open power train detach from Clutch.In one example, when operating vehicle with low gear range four-wheel drive, power train separation clutch remains closed State and when with high speed gear range four-wheel drive operate vehicle when and two-wheel drive during can be selectively opened transmission System's separation clutch.In another example, when with low gear range four-wheel drive operate vehicle when can vehicle Opening power train detaches clutch after stopping amount at the first time.On the contrary, being transported when with two-wheel drive or high speed gear four-wheel drive When changing trains or buses, power train separation clutch can be opened after vehicle has stopped the second time quantum, the second time quantum is less than It measures at the first time.Method after detaching clutch and engine automatic stop plan is adjusted for low gear range four-wheel drive 400 advance to the 410 of Fig. 4.

Fig. 4 is returned to, at 409, method 400 allows DISG to promote vehicle without being risen if discharging vehicle brake Dynamic engine.In addition, DISG can promote vehicle until threshold value vehicle torque demand and/or until battery SOC is decreased to threshold value It is horizontal.By with DISG do not have to engine promote vehicle, it may not be necessary to driver's input torque demand and allow vehicle with Lower speed slowly travels.DISG can promote vehicle to make DISG until threshold wheel torque level subsequently starts engine Torque is provided to power train with the desired wheel torque of higher request with engine.In other examples, battery is depended on SOC, DISG and engine can promote vehicle if discharging vehicle brake.Discharge brake pedal after allow DISG and It is not that method 400 advances to 410 after engine promotes vehicle.

At 410, method 400 judges whether to ask manually controlling for engine, power train separation clutch and motor（Example Such as the control of vehicle driver）.It can be inputted by display or be made manually by switch or other known user interface The request of control.If method 400 judges that request manually controls engine, power train separation clutch and motor, answer To be, method 400 advances to the 470 of Figure 10.Otherwise, answer is that otherwise method 400 advances to 411.

Turning now to Figure 10, method 400 judges whether to ask to manually control power train separation clutch at 470. In one example, method 400 may determine that hope to separation Manual clutch control in response to driver's input.If method 400 judge request or wish to power train separation clutch manually control, answer be that method 400 advances to 471.It is no Then, answer is that otherwise method 400 advances to 473.

At 471, method 400 judges whether driver currently asks separation clutch lock being scheduled on closed position.Method 400 input in response to the user from driver and can determine request and power train separation clutch lock is scheduled on closed position. If method 400 judges to wish separation clutch lock being scheduled on closed position, answer be that method 400 advances to 472.It is no Then, answer is that otherwise method 400 advances to 473.If method 400 advances to 473, automatic operating power train detach clutch and It is not responsive to specific driver's request and detaches clutch to open and close power train.

At 472, method 400 is closed power train separation clutch and it is allowed to be locked in closed state until driver releases Power train separation clutch is manually controlled.Connect engine and DISG with being closed power train separation clutch mechanism, still DSIG and/or engine can be deactivated when being closed power train and detaching clutch.It is closed power train and detaches method after clutch 400 advance to 473.

At 473, method 400 judges whether that pure DISG is asked to operate.In pure DISG operation modes, by stopping fuel It flows to engine and deactivates engine.Engine air throttle can also be closed when engine deactivates and adjust cam timing/liter Journey, which increases pumping loss to lower volumetric efficiency and reduces air-flow, passes through engine.It alternatively, can be with opening throttle And cam timing/lift is adjusted to higher volumetric efficiency to reduce engine pumping loss.It can be manually selected by driver Pure DISG operatings.If asking pure DISG patterns, answer be that method 400 advances to 474.Otherwise, answer is otherwise method 400 advance to 478.

At 474, method 400 opens power train and detaches clutch to reduce rotational loss, can be used for promoting to increase The amount of the energy of vehicle.If manual closing power train detaches clutch, can forbid entering pure DISG patterns.It has beaten Method 400 advances to 475 after opening power train separation clutch.

At 475, method 400 judges whether battery SOC is less than threshold value SOC.In one example, threshold value SOC is to allow Restart the level of engine by DISG or another starters.Battery SOC can be determined from cell voltage.If method 400 judge battery SOC be less than threshold value SOC, answer be that method 400 advances to 476.Otherwise, before answer is otherwise method 400 Proceed to 480.

At 476, method 400 restarts engine.Restarting engine allows DISG from positive-torque is provided to biography Dynamic system changes into the pattern for absorbing torque from power train and producing electricl energy for storage battery.In other examples, to driving Member, which provides, directly closes DISG after the instructions that will close of DISG and inoperative engine.Restart method after engine 400 advance to 477.

At 477, DISG patterns are changed into the pattern that electric energy is provided to from DISG battery by method 400.However, if hair Motivation lacks torque to provide driver's torque of request, and the not available instructions of DISG are provided to driver.Otherwise, engine base Torque is provided in driver torque request and passes through DISG rechargeable batteries.Method 400 advances to 480 after changing DISG patterns.

At 478, method 400 judge driver whether the pure engine mode of manual request.In pure engine mode, close It closes power train separation clutch and DISG does not provide positive-torque to power train.However, in some instances, DISG can provide negative Torque with storage battery and provides electrical power to the electric network of vehicle to power train.If the pure engine of driver's manual request Pattern, answer be that method 400 advances to 479.Otherwise, answer is that otherwise method 400 advances to 480.

At 479, method 400 deactivates DISG and provides positive-torque to power train.However, in some instances, DISG can be with Rotating energy from engine is converted into electric energy with charging vehicle battery and provides electrical power to the electric network of vehicle.It deactivates Method 400 advances to 480 after DISG.

At 480, method 400, which judges whether to have requested that into abrupt slope, delays drop pattern（hill decent mode）Ask It asks.In some instances, delay drop pattern instead of or in addition to abrupt slope, upward slope pattern can also be provided at 480（hill assent mode）.In drop pattern is delayed on abrupt slope, engine and DISG can be not on when drop pattern is delayed on abrupt slope than vehicle and provide higher water Flat vehicle braking.The request for delaying drop pattern into abrupt slope can be manually entered by driver.Alternatively, when vehicle inclinometer Abrupt slope can be entered by indicating when the negative track gradient steeper than threshold value negative slope delays drop pattern.If request is used for abrupt slope The request of slow drop pattern, answer be that method 400 advances to 481.Otherwise, answer is that otherwise method 400 advances to 482.? In example including upward slope pattern, power train is operated in a similar way and detaches clutch.

At 481, method 400 is closed separation clutch with mechanically connected engine with DISG and is started by increasing Mechanism is dynamic and DISG is braked and increased vehicle braking.In one example, increased by adjusting engine valve timing and started Mechanism is dynamic.Increase DISG by allowing more field supplies to be provided to DISG to brake.In one example, in response to traveling Road gradient and adjust DISG braking and engine braking rate.For example, if it is considered to pavement of road is more smooth than threshold value, it can To reduce the rate of DISG and engine braking.Method 400 advances to 482 after adjusting DISG and engine braking.

At 482, method 400 allows driver to be manually entered engine stop condition.Extraly, method 400 in response to The stop condition that is manually entered and stop engine.For example, vehicle may be automatically stopped engine rotation after reaching zero velocity Driver can be with input time section before.In another example, driver, which can specify, can be automatically stopped engine rotation Threshold battery SOC.In yet another example, driver can specify starts when going up a slope or downward grades are steeper than designated value Machine does not stop.After allowing driver to be manually entered engine stop condition and at the rear for executing engine stop condition Method 400 advances to 483.

At 483, method 400 allows driver to be manually entered DISG operation mode conditions.In addition, method 400 in response to The condition that is manually entered and operate DISG.For example, driver can input then operates DISG without providing fuel less than the level Wheel torque request to engine is horizontal.In another example, driver can specify higher than the threshold torque then DISG Assisted engine provides the threshold torque of desired vehicle torque.In another example, driver can specify when battery SOC is small DISG provides electric energy to battery when driver's input level.Driver is allowed to be manually entered method after DISG operating conditions 400 advance to 484.

At 484, method 400 allows driver to be manually entered power train separation clutch opening and closing condition.For example, Driver can input in response to specific power train pattern（Such as separation clutch is kept to be closed in 4x4 low speed gear patterns And selectively close off separation clutch in 4x2 and 4x4 high speed gear patterns）And it is closed the condition of power train separation clutch. In another example, driver can input in response to the engine idling duration and be closed power train separation clutch Condition.In another example, driver, which can specify, is closed power train separation clutch when battery SOC is less than driver's designated value Device.Method 400 exits after permission driver is manually entered engine, power train detaches clutch and motor control condition.

Fig. 4 is now turned to, method 400 detaches clutch according to the automatic condition running engine of benchmark of adjusting, power train And DISG.Specifically, other than the specific driver in 400 above-mentioned part of input method changes, the hair of reference calibration Motivation, power train separation clutch and DISG operating modes are the bases of running engine, power train separation clutch and DISG.Example Such as, if driver asks PTO operatings and DISG operatings reach the level that driver specifies until battery SOC, at vehicle Clutch and DISG are detached according to the condition running engine of reference calibration, power train when using the PTO mode of DISG.According to Method 400 exits after the benchmark operation mode condition running engine of adjusting, power train separation clutch and DISG.

To, the method for Fig. 4-10 provides a kind of method of operating PTO, including：In a first direction by PTO power source It is upper rotation and rotate PTO output；And it is reversely revolved by PTO power source rotates in a second direction different from the first direction Turn PTO outputs, PTO power source is arranged in vehicle transmission system.Method include the setting of PTO power source engine and torque-converters it Between.Method includes that PTO power source is DISG.Method includes that PTO power source is additionally arranged at power train separation clutch and torque-converters Between.

In some instances, method, which is further included, is currently at extreme limit of travel in response to the PTO devices operated and terminates DISG is exported.Method include when rotate PTO output when power train separation clutch it is in the open state.Method further includes with wherein The static PTO mode that vehicle does not move operates vehicle.Method is further included in response to battery SOC and providing PTO will stop The instruction of machine.Extraly, method also terminates after providing the instruction that PTO will be shut down dynamic by the offer of PTO power source Power to PTO export.

In another example, the method for Fig. 4-10 provides a kind of method of operating PTO, including：Pass through rotation first PTO power source and the second PTO power source and rotate PTO outputs, the first PTO power source and the second PTO power source provide positive-torque To vehicle transmission system；And to change the first PTO power source and the 2nd PTO in response to the available output in the second PTO power source dynamic The output in power source.Method is engine including the first PTO power source and the second PTO power source is DISG.Method includes that setting exists Power train separation clutch in power train between the first PTO power source and the second PTO power source is in closed state.One In a little examples, method further includes in response to the wheel torque less than desired wheel torque and adjusts the first PTO power source Output.Method also includes the output in response to adjusting the second PTO power source less than desired wheel torque.

In another example, the method for Fig. 4-10 provides a kind of method of operating PTO, including：In static vehicle PTO is operated, PTO is operated with still-mode；First PTO power source is rotated with first direction and second direction and rotates PTO outputs； And rotate PTO outputs by the dynamic positive-torques provided of the first PTO and by the positive-torque that the second PTO power source provides.Method It further includes and opens power train separation clutch when PTO is rotated with second direction and beaten when PTO is rotated with first direction Open or be closed power train separation clutch.In some instances, method, which is further included, terminates operating in response to battery SOC One PTO power source.Method further includes the rotating speed that PTO outputs are adjusted by adjusting the positive-torque that the first PTO power source provides. Method further includes the rotating speed that PTO outputs are adjusted by adjusting the positive-torque that the second PTO power source provides.Method further includes One power source is DISG, and the second PTO power source is engine, and DISG be arranged in power train speed changer and engine it Between.

Referring now to Figure 11, showing that operating includes the anticipation exemplary sequence of the vehicle of PTO.It can be by being in Fig. 1-3 The method in Fig. 4 is executed in system and the sequence of Figure 11 is provided.Figure 11 shows that the PTO operatings that only DISG provides torque to PTO are shown Example.However, in some instances, engine can also provide PTO torques.

The first width chart from the top of Figure 11 shows the PTO requests relative to the time.X-axis represents the time and Y-axis indicates The solicited status of PTO operatings.The PTO signal designations of reduced levels do not have PTO operating requests.The PTO signal designations of higher level There are PTO operatings to ask.Right side of the time from the left side of chart to chart increases.

The second width chart from the top of Figure 11 shows the battery charge state relative to the time.X-axis represents the time and Y-axis Indicate battery charge state.Battery charge state increases towards Y-axis arrow direction.Right side of the time from the left side of chart to chart increases Add.Horizontal line 1101 represents the minimum battery SOC of operating DISG.

Third width chart from the top of Figure 11 shows the directions the PTO request relative to the time.X-axis represents the time and Y-axis Indicate the directions PTO solicited status.The directions the PTO request signal of reduced levels is indicated with positive direction（Such as to right rotation）Rotation PTO.The directions the PTO request signal instruction PTO of higher level is rotated with negative direction（Such as PTO is to anticlockwise）.Time is from chart Left side to the right side of chart increase.

The 4th width chart from the top of Figure 11 shows the direction of rotation relative to the time.X-axis represents the time and Y-axis indicates The directions PTO.The PTO direction signals instruction PTO of reduced levels is rotated with positive direction（Such as to right rotation）.The PTO of higher level Direction signal instruction PTO is rotated with negative direction（Such as PTO is to anticlockwise）.Right side of the time from the left side of chart to chart increases Add.

The 5th width chart from the top of Figure 11 shows the PTO torques relative to the time.X-axis represents the time and Y-axis indicates PTO output torques.Output torque positive PTO increases towards Y-axis arrow direction.Right side of the time from the left side of chart to chart increases Add.In this example, since PTO provides torque to external device (ED), PTO output torques are shown always independently of the direction of rotation PTO It is shown as just.

The 6th width chart from the top of Figure 11 shows the DISG torques relative to the time.X-axis represents the time and Y-axis indicates DISG output torques.Output torque positive DISG increases towards Y-axis arrow direction.Right side of the time from the left side of chart to chart increases Add.In this example, torque is provided to external device (ED) via PTO due to DISG, DISG output torques are independently of the direction of rotation PTO And it is shown as always just.

In time T₀Place, PTO requests are in the low-level for indicating no PTO requests and PTO outputs.At battery charge state The relatively high level of a period of time can be only operated under battery power in instruction PTO.The request signal instruction of the directions PTO is worked as It is operated with positive direction using PTO when PTO.The directions PTO also indicate if if PTO will rotate in the forward direction.Since PTO is not used Then PTO output torques are in zero and IDSG torques are also displayed as zero.

In time T₁Place is changed into higher level to indicate to answer in response to driver or controller request PTO request signals This uses PTO.PTO request signals can ask in response to the driver's input exported for PTO or controller and be changed.Battery State-of-charge starts slowly to reduce with the increase that DISG is exported, to increase PTO torques.The request of the directions PTO remains as just The PTO of direction and such as directions PTO chart instruction is rotated in the forward direction.

In time T₂Place asks from positive transition to be reversed in response to driver or the directions controller request PTO.Reduce The directions PTO become reversely from forward direction to adapt to the change in the directions PTO in the short time after DISG and PTO torques.Reduce PTO and DISG torques are to avoid generation torque disturbances to power train.Battery charge state continues to reduce with remaining in operation for DISG.

In time T₃PTO requests are still advocated at place, but battery SOC is decreased to the charged shape of minimum for allowing DISG to operate State 1101.So reducing DISG output torques and PTO torques in response to battery SOC.The directions PTO and the request of the directions PTO are still In reverse state.It is closed by slope（ramp off）DISG, can be to avoid deterioration of battery.

In this way, the power train including DISG and PTO can be operated to provide direction controlling.Furthermore, it is possible to limit PTO operatings To reduce the possibility of battery and/or DISG deteriorations.

Referring now to Figure 12, showing that operating includes the anticipation exemplary sequence of the vehicle of 4x4 low gear range modes.It can To provide the sequence of Figure 12 by the system by Fig. 1-3 executes the method for Fig. 4.

The first width chart from the top of Figure 12 shows the 4x4 low gear range of requests relative to the time.When X-axis represents Between and Y-axis represents 4x4 low gear range of requests states.The 4x4 low gear range signals of reduced levels indicate that no 4x4 is low The operating of speed gear position range is asked.There are the operatings of 4x4 low gear ranges to ask for the 4x4 low gears range signal of higher level It asks.Right side of the time from the left side of chart to chart increases.

The second width chart from the top of Figure 12 shows the desired wheel torque relative to the time.X-axis represents the time and Y Axis represents desired wheel torque.Desired wheel torque increases towards Y-axis arrow direction.Time is from the left side of chart to chart Right side increases.

Third width chart from the top of Figure 12 shows the engine operating status relative to the time.X-axis represents the time and Y Axis indicates engine operating status.The engine CRANK PULSES instruction engine of reduced levels has shut down.Higher level Engine operating status signal designation engine rotated under its own power.Right side of the time from the left side of chart to chart Increase.

The 4th width chart from the top of Figure 12 shows the vehicle brake pedal state relative to the time.When X-axis represents Between and Y-axis indicate brake pedal status.The brake pedal signal instruction of reduced levels without application or has discharged braking Device pedal.Brake pedal is applied in the brake pedal signal instruction of higher level.The right side of the time from the left side of chart to chart Side increases.

The 5th width chart from the top of Figure 12 shows the engine torque relative to the time.X-axis represents the time and Y-axis refers to Show engine output torque.The positive output torque of engine increases towards Y-axis arrow direction.Time is from the left side of chart to chart Right side increases.

The 6th width chart from the top of Figure 12 shows the DISG torques relative to the time.X-axis represents the time and Y-axis indicates DISG output torques.Output torque positive DISG increases towards the direction of Y-axis arrow.Right side of the time from the left side of chart to chart Increase.

In time T₀Place, the request of 4x4 low gear ranges is in the low water for indicating no 4x4 low gears range of requests It is flat.Desired wheel torque is in medium level and engine rotates under its own power.The not DISG using brake Torque is all provided with engine to vehicle transmission system.

In time T₁Place, reduces desired wheel torque in response to driver's relief accelerator pedal.In addition, driver Reduce engine and DISG torques in response to the desired wheel torque of reduction using vehicle brake pedal.Engine after Reforwarding turns and asks 4x4 low gear ranges not yet.

In time T₂Place, it is desirable to wheel torque reach zero and be automatically stopped engine in the hereafter short time without driving The person of sailing asks engine stop by the special input for only having the function of starting and/or stopping engine.Engine condition is believed Number it is changed into low-level to indicate that engine has stopped.Engine torque and DISG torques are in zero level not promote vehicle ?.Vehicle brake is still within application state.

In time T₃Place is such as changed into the request 4x4 low gears of the 4x4 low gear range signals instruction of higher level Range.4x4 low gears range signal can be advocated in response to the request of driver to enter 4x4 low gear ranges.? Time T₃Place detaches clutch in response to being also closed power train into 4x4 low gears range（It does not show）.

In time T₄Place, vehicle brake condition responsive discharge brake pedal in driver and are changed into reduced levels. Since vehicle is in 4x4 low gear ranges, the automatic engine that starts is discharged without driver in response to brake pedal It is input to the device for only having the function of starting and/or stop engine（Such as starter switch）.Hereafter in the short time, response Vehicle torque desired by accelerator pedal is stepped in driver to increase.In response to increased desired wheel torque, engine is turned round Square and DISG torques also increase to provide desired wheel torque.To, when vehicle is in 4x4 low gear ranges in response to Brake pedal discharges and starts engine automatically.The operating allows the torque of vehicle transmission system reception higher level.Starting Power train separation clutch remains engaged with during machine stops and restarts the period.

In time T₄And T₅Between, in response to driver or controller ask and increase engine torque and DISG torques with Desired wheel torque is provided.In addition, brake pedal is still within dead status until in time T₅Place is such as changed into higher Brake pedal is applied in horizontal brake pedal status instruction.In time T₅Place is in response to driver's relief accelerator pedal And also reduce desired wheel torque signal.In addition, in time T₅Place reduces hair in response to the desired wheel torque of reduction Motivation torque and DISG torques.Vehicle is still within 4x4 low gear ranges.In time T₆Make engine at short time before It shuts down and stops rotating.With in time T₂Place's vehicle is in 4x2 patterns and compares, since vehicle is in 4x4 low gear ranges, when When desired wheel torque reaches zero, when reducing engine torque with idle running engine and when DISG torques reach zero The time quantum spent between time when to engine stop increases.The time of this extra delay is useful to allow coarse Track on traveling between time out and not prematurely stop engine.

In time T₆Place, vehicle 4x4 low gears range is exited in response to operator demand and be changed into 4x2 driving or 4x4 high speed gear ranges.Such as it is still within continuing using brake pedal for the brake status signal designation of higher level.Hair Motivation torque and DISG torques are still within low-level.

In time T₇It is asked in response to driver or controller and increases desired wheel torque in place.Now not due to vehicle In 4x4 low gear ranges, engine keeps stopping and increases DISG output torques to meet desired wheel torque.From And DISG provides torque（Creeping torque including being slowly advanced vehicle（creep torque）Wheel without driver is turned round Square demand）To power train until threshold torque allows to save fuel.Such as it is changed into the brake status instruction of reduced levels Vehicle brake still discharge.

In time T₈Place, in response to by increasing desired vehicle by the desired wheel torque of driver or controller request Torque is taken turns to the level for restarting engine.Such as be changed into the engine status signal instruction of higher level starts engine Engine torque is provided to power train to meet desired wheel torque later.To in time T₈Place, engine and DISG are Torque is provided to meet desired wheel torque.

In this way, compared with vehicle is with different power train mode operations, it can when operating vehicle with 4x4 low gear ranges Distinctively to operate the power train including DISG and engine.This runs through limitation application and release power train separation clutch Between number of transitions and the deterioration of power train part can be reduced.

Referring now to Figure 13, showing the anticipation exemplary sequence that vehicle operates between 4x2 and 4x4 patterns.It can scheme The method in Fig. 4 is executed in the system of 1-3 and the sequence of Figure 13 is provided.

The first width chart from the top of Figure 13 shows the chart of the available engine mode relative to the time.X-axis represents Time and Y-axis indicate available engine mode.When the value of available engine mode is 1, only it is connected to by engine DISG and running engine.In addition, when the value of available engine mode is 1, engine keeps rotation.Start when available When the value of machine pattern is 2, power train separation clutch may be at the state of open or close.When the value of engine mode is 2 When engine keep rotation, and when open power train detach clutch when engine can be with idle running.Start when available When the value of machine pattern is 3, engine rotation can keep idle running, non-idle running（off-idle）Or stop saving About fuel.Available engine mode changes in response to the condition of road surface standard described in the second width chart.Time is from chart Left side to the right side of chart increase.

The second width chart from the top of Figure 13 shows condition of road surface standard or value relative to the time.X-axis represents the time And Y-axis represents condition of road surface standard.Condition of road surface standard value increases towards Y-axis arrow direction.Time is from the left side of chart to chart Right side increase.Horizontal line 1301,1302,1303 and 1304 represents the condition of road surface standard that available power train pattern changes Different threshold levels.The condition of road surface standard indicated by line 1301 represent road may be it is very smooth, very bending or The condition of road surface standard of very coarse high value.It may be light that the condition of road surface standard indicated by line 1302, which represents road, Cunning, very the condition of road surface standard of bending or coarse medium high value.The condition of road surface standard generation indicated by line 1303 Table road may be it is slightly smooth, very bending or coarse medium lower value condition of road surface standard.It is indicated by line 1304 Condition of road surface standard represent road not and be that non-ordinary light is sliding, the unusual condition of road surface mark of bending or very coarse lower value It is accurate.

Third width chart from the top of Figure 13 shows the engine operating status relative to the time.X-axis represents the time and Y Axis indicates engine operating status.When the value of engine condition is 1, engine stop rotation.When the value of engine condition is 2 When, when opening power train and detaching clutch with engine with idle running.In addition, when being closed power train separation clutch and hair When the value of motivational state is 2, engine can be with idling or non-idling（Such as higher engine speed）Operating.When engine shape When the value of state is 3, when being closed power train and detaching clutch, engine can be with idling or non-idle running.Time is from a left side for chart The right side of lateral chart increases.

The 4th width chart from the top of Figure 13 shows the power train pattern relative to the time.X-axis represents the time and Y-axis refers to Show power train pattern.The power train mode signal instruction power train of reduced levels is in 4x2 patterns.The power train mould of higher level Formula signal designation power train is in 4x4 patterns.Right side of the time from the left side of chart to chart increases.

The 5th width chart from the top of Figure 13 shows that the power train relative to the time detaches clutch state.X-axis represents Time and Y-axis instruction power train detach clutch state.The power train separation clutch state instruction separation clutch of higher level Device is closure and engine is mechanically connected to DISG.The power train separation clutch state instruction separation clutch of reduced levels Device is open and engine is not mechanically connected to DISG.Right side of the time from the left side of chart to chart increases.

The 6th width chart from the top of Figure 13 shows the wheel torque request relative to the time.X-axis represents the time and Y-axis The desired wheel torque of instruction.Desired wheel torque increases towards Y-axis arrow direction.The right side of the time from the left side of chart to chart Side increases.

In time T₀Place, the value of available engine mode be 3 and indicate it is that engine may be off, with idle running Or with non-idle running.Herein, road condition standard is in the level less than lower threshold 1304 and such as power train pattern is believed The power train for number being currently at relatively low state instruction is in 4x2 patterns.Since road condition standard is indicated less than horizontal line 1304 Level, engine condition value is 3 and indicates that engine with idling, non-idle running or may may stop.

In time T₁Place, road condition standard increase above the horizontal value of the instruction of line 1304.It is indicated by line 1304 Condition of road surface standard level be in 4x2 patterns when level.Available engine mode is in response to condition of road surface standard value And change.Road or pavement behavior that condition of road surface normal response operates on it in vehicle and change.Available engine mould The value of formula signal changes into 2 in response to the change of condition of road surface standard.Particularly, change available engine mode to lead to Crossing opening power train separation clutch makes engine can be with idling, non-idle running, but engine will not be automatically stopped.Separation Clutch remains closed and wheel torque request keeps relative constant.In addition, power train pattern is still within 4x2 patterns.

In time T₂Place, condition of road surface standard increase above the horizontal value of the instruction of line 1301.Available engine mould The value of formula signal changes into 1 in response to condition of road surface standard.Particularly, change available engine mode to pass through opening Separation clutch engine can will not be automatically stopped with idle running and engine rotation.Separation clutch remains closed and wheel Torque demand keeps relative constant.In addition, power train pattern is still within 4x2 patterns.

In time T₂With time T₃Between, power train pattern becomes 4x4 from 4x2 and changes vehicle in response to operator demand Take turns torque.Condition of road surface standard increases above the value of horizontal line 1301.As a result, the value of available engine mode remains 1 To ensure that power train is ready for respond driver's input during severe driving condition.Engine condition value is 3, and power train Separation clutch remains closed.

In time T₃Place, condition of road surface normal response are decreased to less than the value of horizontal line 1301 in condition of road surface.It is relatively low Condition of road surface standard instruction improve driving condition.Condition of road surface standard of the value of available engine mode in response to reduction And become 2.In addition, detaching clutch as the vehicle torque of display is relatively low to open.As engine condition value becomes 1 instruction Engine become idle running.Power train pattern is still within 4x4 patterns.In this way, being protected by the way that power train is detached clutch Engine fuel consumption can be reduced with idle running engine by holding opening.However, when the value of available engine mode is 2 When engine will not be automatically stopped.

In time T₄Place, condition of road surface normal response decrease below the level of horizontal line 1304 in condition of road surface.Institute With the value of available engine mode becomes 3 to allow engine stop.Separation clutch is still within opening state and transmission It is that pattern is remained in 4x4 patterns.In time T₄Place and time T₅Between, wheel torque increases in response to operator demand It is being turned round with providing desired wheel by the combination of engine and DISG torques of being closed that clutch is detached with reduction and power train Square.Time T₅Power train is closed when wheel torque is more than threshold level detach clutch at short time before.It is detached when opening When clutch engine condition from stop become engine can be with idle running.However, since separation clutch is to be closed, it can With higher rotation speed running engine.

In time T₅Place, condition of road surface normal response increase to the value of the instruction of horizontal line 1304 in condition of road surface.It can use Engine mode value change into 2 with indicate engine can with idling and non-idle running but will not be automatically stopped.It can be with It observes, compared with when vehicle is in 4x2 mode operation vehicles, when vehicle is in 4x4 mode operations in the road of different level Available engine mode changes at the condition criteria of road.When vehicle is in 4x4 mode operations, this operating can reduce transmission The deterioration of component.The value of engine condition is that engine can be with idle running if opening and detaching clutch for 2 instructions.

In time T₆Place, condition of road surface standard value increase above the level of the instruction of horizontal line 1301.Available engine The value of pattern, which becomes 1 instruction present engine, to be automatically stopped.Engine condition also becomes 3 level to indicate when closure Engine can be with idling or non-idle running when detaching clutch.Engine condition and available engine mode are in identical water It is straight to arrive sequence ends.

What one of ordinary skilled in the art was understood, the method that Fig. 4-10 is described represents in any amount processing strategy One of or more persons, for example event-driven, interrupt driving, multitask, multithreading etc..In this way, described each step and work( The sequence that can describe, it is parallel execute, or omitted in some cases.Similarly, since convenient for illustrating and describing, handle Necessary to sequence not reaches target described herein, function and advantage, and provide the convenience for illustrating and describing.Even if Be not explicitly described, one of ordinary skilled in the art be appreciated that according to the specific policy used can execute repeatedly one or The step of multiple descriptions or function.

To sum up, after those skilled in the art read this specification, it is contemplated that a variety of replacements and modification without departing from The spirit and scope of description.For example, can use natural gas, gasoline, diesel oil or alternative fuel configuration operating I3, I4, I5, V6, V8, The present invention can be used to optimize in V10 and V12 engines.

Claims

1. a kind of method of the power output device of operating vehicle, that is, the method for operating the PTO of vehicle, it includes：

It is rotating the outside vehicle by rotating PTO outputs and be different from vehicle via with first direction rotation PTO power source The device of wheel；

By reversely rotating the PTO outputs to rotate the PTO power source different from the second direction of the first direction, The PTO power source is arranged in vehicle transmission system；And when the vehicle is in non-silent mode, in response to the PTO Power source cannot provide desired wheel torque and the torque for rotating the PTO, be closed separation clutch and start and start Machine.

2. according to the method described in claim 1, the wherein described PTO power source is arranged between engine and torque-converters.

3. according to the method described in claim 2, the wherein described PTO power source is the integrated starter generator of power train, i.e., DISG。

4. according to the method described in claim 2, the wherein described PTO power source is additionally arranged at power train separation clutch and described Between torque-converters.

5. being terminated in stroke end in response to the PTO devices operated according to the method described in claim 3, further including The output of the DISG.

6. according to the method described in claim 4, wherein when rotating the PTO outputs, the power train separation clutch is in Opening state.

7. according to the method described in claim 1, the static PTO mode operating that do not moved with the vehicle wherein includes described The vehicle of vehicle transmission system.

8. according to the method described in claim 1, further including in response to battery charge state, battery charge state, that is, battery SOC provides the PTO instructions that will be shut down.

9. being terminated later according to the method described in claim 8, further including and providing the instruction that the PTO will be shut down The PTO outputs are provided power to by the PTO power source.

10. a kind of method of operating power output device, that is, the method for operating PTO, it includes：

The PTO is operated in the static vehicle parked, the PTO is operated with still-mode；

It is defeated by rotating PTO with first direction and the second inverse direction the first PTO power source of rotation in the still-mode Go out, first PTO power source is arranged in vehicle transmission system；And

In the still-mode, provided by the positive-torque of first PTO power source offer and by the second PTO power source Positive-torque rotate PTO output.