CN104121089B - For the method and system of turbocharger control - Google Patents

Abstract

The present invention provides the methods for turbocharged engine of the control with the additional air throttle between the inlet manifold of engine and the outlet of compressor.In a kind of exemplary method, a kind of method includes, and during cold-start situation, a part of compressed air in compressor downstream is made to be diverted to heat exchanger and heat vehicle part using the heat exchanger.

Description

For the method and system of turbocharger control

Technical field

The present invention relates to the method and systems controlled for turbocharger.

Background technology

Engine can include turbocharger, and can be such as via waste gate, air inlet shutter, compressor Deng the active control using turbocharger, to increase engine performance efficiency, and therefore enhance vehicle drive performance.One In a little vehicle applications, the waste heat of such as hot air exhausted from engine can be used to heat various vehicle parts, for example, Heat compartment, secondary throttle deicing and to moisture management system provide heat, to window defroster convey heat, auxiliary plus The engine warm-up of speed and provide heat to other vehicles and engine components.

However, the temperature when engine be less than threshold temperature when cold engine situation during, for example, being filled in engine During dividing the cold-start situation before warming-up, engine exhaust heat is not useable for providing the sky of heating to vehicle and engine components Gas.In certain methods, heating element (for example, electric heater) can be used to aid in providing while engine warm-up Heat.However, this kind of method can reduce engine efficiency, for example, fuel economy can be reduced, because this kind of heating element is operating Period consumes additional energy.

In addition, during some boosting engine operating conditions, the pressure/flow in turbo-charger sytem may cause turbine Turbocharger surge, potentially so that component of turbo-charger is degenerated and reduction vehicle performance.For example, compressor may be due to height Low air flow amount situation (for example, when air inlet shutter is closed or when partially opening) in the case of pressure and surge.It is for example, such Surge event may driver's pine accelerator pedal event (boosting of wherein reduction amount be required for engine operating) it After occur.

The content of the invention

Inventor has realized that the above problem herein, and in a kind of exemplary method, provides one kind for having The method of the vehicle of turbocharged engine.This method includes, during cold-start situation, for example, when engine temperature is less than Threshold temperature or when in the threshold value of environment temperature, makes a part of compressed air in compressor downstream be diverted to heat exchanger, with And heat vehicle part via heat exchanger.This method can be included also, when engine temperature is more than threshold temperature, in response to Surge condition makes a part of compressed air in compressor downstream be diverted to heat exchanger.

For example, additional air throttle can be included between inlet manifold and compressor in turbocharged engine and be taken away (take-off) pipeline, so as to the hyperbaric heating air of heat exchanger conveying heating, thus even if in cold engine shape Also heat can be provided during condition to hectic vehicle and engine components.In addition, the additional air throttle can be used to make one Inlet manifold of the partial compression air away from engine, therefore compressor can make volume in the case where air is not sucked by engine Outer air flow, to reduce surge.

By this method or even during cold-start situation, for example, when engine temperature is less than threshold engine temperature, Can in the case of independent of the additional heating elements (for example, electric heater) of consumption additional energy to various engines and Vehicle part provides the air of heating.In this way, it is possible to increase engine efficiency, while can be provided more under low-temperature condition Fast waste heat source.In addition, the additional air throttle can be used to control the bigger of turbocharger operating, for example, with It reduces surge event and meets boosting request during engine operates.

It should be appreciated that it is to introduce some concepts in simplified form to provide outlined above, these concepts are specific real It applies in mode and is further described.This is not meant to the key or essential characteristic that determine theme claimed, it is desirable that protects The claim that the scope of the theme of shield is followed hard on specific embodiment uniquely limits.In addition, claimed theme is not It is limited to the embodiment for solving any shortcoming referred to above or in any part of the disclosure.

Description of the drawings

Fig. 1 shows the schematic diagram of the example engine system including turbo-charger sytem.

Fig. 2 shows that the example for being included in the additional air throttle in the engine intake duct in compressor outlet downstream is started The schematic diagram of machine system.

Fig. 3 is shown for the exemplary method of the engine with turbocharger according to the disclosure.

Fig. 4 shows to illustrate controls program for the example of the engine with turbocharger according to the disclosure Exemplary graph.

Specific embodiment

It is described below and is related to control all cylinders having positioned at the outlet of compressor and engine as shown in Figs. 1-2 The system and method for the turbocharged engine of additional air throttle in pipeline between inlet valve.As retouched on Fig. 3 and Fig. 4 It states, which can be with reference to other valves in air inlet shutter and turbo-charger sytem (for example, waste gate Valve and anti-surge valve) it uses, to provide heat during cold engine situation for various parts, and in different engine works The control that incrementss are provided is operated during condition to turbocharger.For example, during cold engine situation, for example, from static Cold start after, additional air throttle can be opened, so as to by the compressed air of heating guide to it is one or more heat hand over Parallel operation just heats various vehicles and engine components to work as engine while warming-up.As another example, this is additional Air throttle can be activated during some situations, to aid in reducing the surge event in turbo-charger sytem.

Fig. 1 is shown to be started including multi-cylinder internal combustion engine 10 and the example turbine supercharging of bi-turbo 120 and 130 The schematic diagram of machine system 100.As a non-limiting example, engine system 100 can be included as car and promote system A part for system.Engine system 100 can receive inlet air via inlet channel 140.Inlet channel 140 can include sky Air filter 156.At least a portion inlet air can be drawn via the first branch of the inlet channel 140 pointed out at 142 The compressor 122 of turbocharger 120 is directed at, and at least a portion inlet air can be via the air inlet pointed out at 144 Second branch of passage 140 is directed to the compressor 132 of turbocharger 130.

The first portion of total inlet air can be compressed via compressor 122, wherein can be via inlet air passage 146 Being supplied to inlet manifold 160 should first portion.Therefore, inlet channel 142 and 146 forms the of the air induction system of engine One branch.Similarly, the second portion of total inlet air can be compressed by compressor 132, wherein can be via inlet air Passage 148 is supplied to inlet manifold 160 should second portion.Therefore, inlet channel 144 and 148 forms the air inlet of engine Second branch of system.As shown in Figure 1, the inlet air from inlet channel 146 and 148 can reach inlet manifold 160 It is re-mixed before via shared inlet channel 149, wherein inlet air can be provided to engine.Show at some In example, inlet manifold 160 can include estimating the intake manifold pressure sensor 182 of manifold pressure (MAP) and/or being used for Estimate the intake manifold temperature sensor 183 of manifold air temperature (MCT), each sensor communicates with controller 12.Air inlet is led to Road 149 can include aerial cooler 154 and/or air throttle 158.Control system can be via being communicatively coupled to controller 12 throttle actuator 157 adjusts the position of air throttle.In some instances, inlet channel 149 can include estimating The pressure sensor 172 of 158 upstream pressure of air inlet shutter and/or the temperature sensor 173 for estimating air themperature (MCT), Each sensor communicates with controller 12.As shown in Figure 1, anti-surge valve 152 can be provided, so as to via bypass passageways 150 Selectively bypass the compressor stage of turbocharger 120 and 130.As an example, when the air inlet of upstream of compressor is empty When atmospheric pressure reaches threshold value, anti-surge valve 152 can be opened so that the energy of flow passes through bypass passageways 150.

Engine 10 can include multiple cylinders 14.In described example, engine 10 is included in the form of V-shaped configuration Six cylinders of arrangement.Specifically, six cylinders are disposed in two (cylinder) group 13 and 15, wherein each (cylinder) group bag Include three cylinders.In the example of replacement, engine 10 can include two or more cylinders such as 4,5,8,10 or more A cylinder.These various cylinders can be divided equally and be arranged to alternative constructions (such as V-arrangement, in-line arrangement, box-shaped Deng).Each cylinder 14 can be configured as with fuel injector 166.In described example, fuel injector 166 is Direct in-cylinder injector.However, in other examples, fuel injector 166 can be configured as the fuel spray based on air intake duct Emitter.

The air inlet supplied via shared inlet channel 149 to each cylinder 14 (also referred herein as combustion chamber 14) Air can be used for fuel combustion, and then can organize specific exhaust passage via (cylinder) and discharge combustion product.Institute In the example of description, first (cylinder) group 13 of engine 10 can discharge combustion product via shared exhaust passage 17, and Second (cylinder) group 15 of engine 10 can discharge combustion product via shared exhaust passage 19.

Engine 10 can be conducted through the exhaust of turbocharger 120 via the combustion product that exhaust passage 17 is discharged Turbine 124, this can provide mechanical work via axis 126 for compressor 122 again, to provide compression for inlet air.It is alternative Ground, flow through exhaust passage 17 some or all of exhausts can such as by waste gate 128 control via turbine by-pass passage 123 around Cross turbine 124.The position of waste gate 128 can be controlled by actuator (not shown), this is manipulated by controller 12.As one Non-limiting example, controller 12 can adjust the position of waste gate 128 via solenoid valve.In this particular example, electromagnetism Valve can receive pressure difference, in order to which basis is arranged in the inlet channel 142 of 122 upstream of compressor and is arranged under compressor 122 Air pressure difference between the inlet channel 149 of trip, via actuator activation waste gate 128.In other examples, except solenoid valve Outside, other suitable methods can be used for actuating waste gate 128.

Similarly, engine 10 can be conducted through turbocharger via the combustion product that exhaust passage 19 is discharged 130 exhaust driven gas turbine 134, this can provide mechanical work for compressor 132 via axis 136 again, so as to for flow through engine into The inlet air of second branch of gas system provides compression.

Alternately, whirlpool can be bypassed via turbine by-pass passage 133 by flowing through some or all of exhausts of exhaust passage 19 Wheel 134, this is controlled by waste gate 138.The position of waste gate 138 can be controlled by actuator (not shown), this is by controller 12 manipulate.As a non-limiting example, controller 12 can adjust the position of waste gate 138 via solenoid valve.At this In specific example, solenoid valve can receive pressure difference, in order to according to the inlet channel 144 and cloth for being arranged in 132 upstream of compressor Put air pressure difference between the inlet channel 149 in 132 downstream of compressor, via actuator activation waste gate 138.Show at other In example, in addition to solenoid valve, other suitable methods can be used for actuating waste gate 138.

In some instances, it is variable geometry turbine that exhaust driven gas turbine 124 and 134, which can be configured as, wherein controlling Device 12 can adjust the position of turbine wheel blade (or blade), obtained with change from exhaust stream and pass to its each compressor Energy level.Alternately, it is variable nozzle turbine that exhaust driven gas turbine 124 and 134, which can be configured as, and wherein controller 12 can To adjust the position of turbine nozzle, to change the energy level for being obtained from exhaust stream and passing to its respective compressor.For example, control System processed can be configured as being changed independently the blade or nozzle location of exhaust driven gas turbine 124 and 134 via respective actuator.

The combustion product that cylinder is discharged via exhaust passage 19 can be directed to air via exhaust passage 170, and pass through The combustion product discharged by exhaust passage 19 can be directed to air via exhaust passage 180.Exhaust passage 170 and 180 can To include one or more exhaust gas post-treatment devices (such as catalyst) and one or more exhaust sensors.

It can be via the tappet for the hydraulic actuation for being coupled to valve actuating push rod or via the cam profile of cam lobe is used to become Converting mechanism adjusts the position of the air inlet of each cylinder 14 and exhaust valve.In this illustration, the air inlet of at least each cylinder 14 Door can be controlled by cam-actuated using cam-actuated system.Specifically, inlet valve cam actuating system 25 can include One or more cams, and variable cam timing or lift can be used for air inlet and/or exhaust valve.Alternative real It applies in example, electric valve actuation control inlet valve can be passed through.Similarly, can be caused by cam-actuated system or electric valve Dynamic control exhaust valve.

In order to provide heat and to engine and vehicle part in order to operate the phase in engine during cold engine situation Between increase the control to turbocharger operating, additional or the second air throttle 185 is included in positioned at one of engine or more In inlet valve in multiple cylinders and the pipeline between the outlet of compressor 181.Control system can be via communicatively coupled Throttle actuator 187 to controller 12 adjusts the position of air throttle.Pipeline 181 is disposed in compressor (for example, compressor 132 and/or compressor 122) outlet and engine cylinder in inlet valve between.For example, pipeline 181 can be into moral 158 upstream of valve and inlet channel 149 is coupled at the position in 172 downstream of aerial cooler.However, in other examples, Pipeline 181 can be coupled to pipeline 148 or in 122 outlet downstream of compressor or at any other in 132 outlet downstream of compressor Suitable position is coupled to pipeline 146, so that a part of compressed air is diverted away from one or more inlet valves in engine. Fig. 1 shows in exemplary fashion in 122 and 132 outlet downstream of compressor and is coupled to pipeline in 154 upstream of intercooler 146 pipeline 181.

Pipeline 181 is configured as the compression of the heating of compressor (for example, compressor 132 and/or compressor 122) output Air guides or is diverted to one or more heat exchangers (for example, heat exchanger 189).For example, heat exchanger 189 can be Pipeline 181 is fluidly coupled at the position in 181 downstream of the second air throttle.The sky of the heating received at heat exchanger 189 Gas can be used to provide heat to one or more engines or vehicle part 191, such as to heat compartment, auxiliary solar term Door deicing, to moisture management system provide heat, to window defroster conveying heat, auxiliary accelerate engine warm-up and to its His vehicle and engine components provide heat.Compartment can be residing for the vehicle seat set for passenger and/or vehicle driver/operator Inner space.Heat exchanger can with heater core (heater core be coupled in engine coolant cycle in) upstream and/ Or the air exchange heat in the pipeline of the HVAC system in the main cabin in downstream.In addition, heat exchanger can be via heater core upstream Engine coolant cycle with engine coolant system exchanged heat and/or with other fluid communications heat.

Engine system 100 can include various other sensors.For example, each in inlet channel 142 and 144 It can include mass air flow sensor (not shown).In some instances, only there are one energy in inlet channel 142 and 144 Enough include Mass Air Flow (MAF) sensor.In some instances, inlet manifold 160 can include air- distributor pressure (MAP) sensor 182 and/or intake manifold temperature sensor 183, each sensor communicate with controller 12.In some examples In, shared inlet channel 149 can include the throttle inlet pressure (TIP) for estimating throttle inlet pressure (TIP) Sensor 192 and/or the throttle inlet temperature sensor 193 for estimating air throttle air themperature (TCT), each sensor is equal It communicates with controller 12.

Engine 10 can receive the control parameter from controller 12 and come from vehicle operators via input unit 192 190 input.In this illustration, input unit 192 includes accelerator pedal and for generating proportional pedal position letter The pedal position sensor 194 of number PP.As being described in further detail in Fig. 1, in response to the input received from vehicle operators, control Device 12 can be configured as the amount of boost that adjustment is provided by turbocharger 120 and 130, and thus adjust TIP.Show at one In example, controller 12 can be by this to realize to change the position of air throttle 158 by means of adjusting throttle actuator 157 Situation.In another example, controller 12 can adjust waste gate 128 and 138 and thus adjustment is around turbine 124 and 134 Capacity realize such case.In other examples, controller 12 can be by adjusting the leaf of variable geometry turbine Piece position and/or nozzle location realize such case.

It will be appreciated that though Fig. 1 shows the example engine system for including bi-turbo construction, but show at other In example, any amount of turbocharger and any turbocharger configuration can be used.For example, engine system can include Single turbocharger with single compressor and turbine.

Fig. 2 shows showing for additional or the second air throttle being included in the engine intake duct in compressor outlet downstream Another schematic diagram of example engine system.Same numbers shown in Fig. 2 correspond to hereinbefore described shown in FIG. 1 identical Element.As shown in Fig. 2, additional or the second air throttle 185 is disposed in pipeline 181, pipeline 181 is in the outlet of compressor 216 214 downstreams and 202 upstream of inlet valve of cylinder 14 in engine is coupled to inlet channel 149.As described above, engine can be with Any appropriate number of cylinder including any suitable constructions form, wherein each cylinder includes inlet valve and exhaust valve.For example, As shown in Fig. 2, cylinder 14 includes inlet valve 202 and exhaust valve 204, and pipeline 181 is arranged in the cylinder of engine The upstream of at least one inlet valve.In some instances, pipeline 181 can be disposed in the upstream of inlet manifold 160 so that institute State the upstream for all inlet valves that pipeline is disposed in all cylinders of engine.In addition, in some instances, such as Fig. 2 institutes Show, pipeline 181 can be disposed in main or the first air inlet shutter 158 upstream.

Pipeline 181 can be coupled to inlet channel 149 at junction 206, to be activated in the second air throttle 185 or During the engine operating of boosting when being at least partially opened, compressor 216 is compressed via at least a portion of 214 output of outlet Air is directed away from air inlet shutter 158, is entered towards one or more heat exchangers (for example, heat exchanger 189) In pipeline 185.Even if during cold engine situation, for example, when the temperature of engine is less than threshold temperature, compressor 122 The compressed air of output can also be heated to following degree at least partly, i.e., when the compressed air of the heating is directed to heat During exchanger 189, heat exchanger can supply heat to one or more vehicles or engine components 191.

As described above, various sensing systems can be included in engine system, each sensing system with control Device 12 processed communicates.For example, Fig. 2 show sensing system 212 in the inlet channel 149 in 158 downstream of air inlet shutter, Sensing system 210 positioned at 210 downstream of compressor outlet and the sensing system 208 positioned at 216 upstream of compressor.Sensor System 212,210 and 208 can include pressure sensor, air flow sensor, temperature sensor etc., and can be used to Determine engine running parameter, and engine and turbocharger operating mode can be adjusted in response to these definite parameters. For example, as being more fully described below in relation to Fig. 3 and Fig. 4, in response to changing for engine and/or turbocharger operating mode Become, can activate and adjust air inlet shutter 158, the second air throttle 185, waste gate valve are (for example, waste gate 128 and/or exhaust gas Door is one or more 138) and in anti-surge valve 152.

Fig. 3 shows to include being located at the pipeline being coupled between the cylinder air inlet door in compressor outlet and engine In additional or the second air throttle (for example, second air throttle 185) turbocharged engine exemplary method 300.For example, whirlpool The first air throttle (for example, air inlet shutter 158) and the second air throttle can be included by taking turns engine with supercharger, wherein the first air throttle It is arranged in the engine intake duct in compressor outlet downstream, and the second air throttle is different from the first air throttle, it can be by A part of compressed air for making compressor downstream during selected situation is diverted to heat exchanger.Steering can cause air remote From engine intake duct, therefore it will not enter engine cylinder, start wherein the air for leaving heat exchanger will not enter Machine cylinder, but be directed into and heat other fluids.In addition, in some instances, heat exchanger can be not present, but heat Air can be used directly other component in heating element (such as windshield) or enging cabin.By this method, may be used So that compressed air turns to, avoids being sucked by engine, so as to heat various engines and vehicle part and/or increase to boosting Engine operating control.

At 302, method 300 includes determining whether entry condition meets.Entry condition can include sending out from standing start The engine start request (for example, key sparking event) of motivation.In addition, entry condition can include determining that engine whether by It is configured to be operated using boosting.If entry condition meets at 304, method 300 enters 304.

At 304, method 300 includes determining whether engine temperature is less than threshold temperature.For example, in engine system One or more temperature sensors can be used to determine the temperature of engine.For example, one in the exhaust system of engine A or more sensor can be used to determine the temperature of engine.As another example, compression within the engine is set One or more sensors of machine outlet downstream can be used to determine the temperature of engine.This temperature of engine can be with It is used to determine that cold-start situation whether there is.Threshold temperature can be based on the warm by various engines and vehicle part consumption Amount, and therefore can be based on the excess heat for being used to fully heat these components from engine.

For example, from after standing start engine, engine can be without abundant warming-up to various engines and vehicle Component provide waste heat, and after cold start for example when operator via vehicle HVAC system require heat when, engine warm-up.Cause This, if engine temperature is less than threshold temperature at 304, method 300 enters 306, to turn the compressed air of heating To heat exchanger.For example, the second air throttle 185 can be actuated to the position being at least partially opened, to make compressor (example Such as, compressor 216) output heating compressed air in some be diverted away from the inlet manifold of engine and into pipeline 181。

Then the compressed air of this heating can be used to the auxiliary during cold engine operating mode and heat various engines And vehicle part.Therefore, at 308, method 300 is using heat exchanger heating element.For example, it can will be conducted through The hot compressed air of pipeline 181 is delivered to one or more heat exchangers for being thermally coupled to heat dissipation engine and vehicle part (for example, heat exchanger 189).

At 310, method 300 includes determining when whether increased boosting request is sent out when engine temperature is less than threshold temperature It is raw.For example, increased boosting request can step on accelerator pedal in response to increased engine load and/or in response to driver (wherein driver forces down accelerator pedal to require the torque of incrementss) and occur.

If increased boosting request has occurred at 310, method 300 proceeds to 312, to adjust waste gate valve with reality Existing desired boosting.For example, one or more in waste gate valve 128 and 138 can activated, to meet increased boosting Request.For example, the aperture of waste gate valve can reduce, to increase the boost air amount for being supplied to engine, while the second section Valve is maintained at fixed open position.

During boosting rectifier control when engine temperature is less than threshold temperature, the valve controlled for engine can be selected Adjustment, so that the second air throttle is maintained open position so that the compressed air of heating was diverted into the engine warm-up phase Between heat heat dissipation engine and vehicle part.For example, the second air throttle can be initially opened to completely open position, and Waste gate adjustment can be carried out to adjust boosting.It is risen however, if waste gate is adjusted to the position completely closed to increase Pressure, but increased boosting request is still unsatisfactory for, then the position of the second air throttle can be adjusted.For example, it is risen to meet Pressure request, the second air throttle can be adjusted to the position partially opened from completely open position.

Therefore at 314, method 300 includes determining whether realize desired boosting by adjusting waste gate valve.If Desired boosting is realized at 314, then method 300 returns to 304, to determine whether engine temperature is still below threshold value temperature Degree.If however, being not carried out desired boosting at 314, method 300 enters 316, to adjust the second air throttle with reality Existing desired boosting.For example, the second air throttle 185 can be adjusted to the second open position from initial open position, wherein The opening of the second air throttle is more than the opening of the second air throttle in the second open position during in initial open position Amount.Once meeting boosting by these adjustment increases request, then method 300 can be back to 304, to determine engine temperature Whether degree is still less than temperature threshold.

310 are back to, if increased boosting request does not occur, then method 300 proceeds to 318, to determine to reduce Boosting request whether occur.For example, the boosting request reduced can be in response to the reduction of engine load and/or in response to driving The person of sailing pine accelerator pedal (wherein driver's accelerator-off to require the torque of reduction amount) and occur.If 318 Without the boosting request reduced, method 300 enters 324 at place, to adjust waste gate valve to realize desired boosting.Example Such as, while the second air throttle is maintained fixed open position, can adjust one or more in engine system A waste gate valve is supplied to the amount of boost of engine with adjustment.

If the however, boosting request reduced at 318, then method 300 proceeds to 320, to adjust the Two air throttles are to realize desired boosting.For example, if the second air throttle 185 is in the position partially opened, then Ke Yizeng Add the opening of the second air throttle, to reduce the boost air amount for being supplied to engine.In this way, it is possible to convey incrementss Heating air, to work as engine heated engine and vehicle part still while warming-up.If however, the second air throttle The boosting request for being adjusted to completely open position and reducing still is unsatisfactory for, then the tune of one or more waste gate valves It is whole to be used to further reduce the boosting for being supplied to engine, it is asked with meeting the boosting reduced.

Therefore, at 322, method 300 determines whether realize desired boosting via the adjustment of the second air throttle.If Desired boosting is realized at 322, method 300 is back to 305, to determine whether engine temperature is still below threshold temperature.So And if being not carried out desired boosting at 322, then method 300 proceeds to 324, to adjust waste gate to realize the phase The boosting of prestige.For example, the opening of one or more waste gate valves in engine system can be increased, provided to reduce To the amount of boost of engine, asked with meeting the boosting reduced.

In some instances, engine and turbocharger operating mode can cause the surge event in turbocharger, surge Event can make component of turbo-charger and engine operate and degenerate.For example, during high pressure and the situation of low discharge, compressor meeting Generation surge.For example, these surge conditions can be reduced in the aperture of air inlet shutter 158 and boost pressure maintain high level when Occur after driver's pine accelerator pedal.Therefore, at 326, method 300 includes determining that surge condition whether there is.Example Such as, determine surge condition with the presence or absence of can be based on the various sensing systems in engine system (for example, sensor system It is one or more in system 212,210 and pressure reading 208), temperature reading and air mass flow reading.If for example, really Boost pressure is determined more than pressure threshold and determines that the flow of the boost air in inlet channel 149 is less than air mass flow threshold value, So surge condition can be identified.As another example, the confirmation of surge condition can the position based on air inlet shutter 185 And the boost air amount of compressor output.For example, if boost air amount is more than threshold value and if air inlet shutter 158 Opening is less than threshold quantity, then surge condition can be identified.

If there is no surge conditions, method 300 at 326 to be back to 304, to determine whether engine temperature is still below Threshold temperature.If however, surge condition has occurred at 326, method 300 enters 328, so as to adjust the second air throttle with Reduce surge condition.For example, the opening of the second air throttle 185 can be increased, to turn increased part boost air To in pipeline 181, to be delivered to heat exchanger 189.If however, the second air throttle be in completely open position and Surge condition there are still, then the anti-surge valve in the pipeline between compressor outlet and suction port of compressor can be adjusted (for example, valve 152), further to reduce the boost air amount in inlet channel 149.Therefore, at 330, method 300 includes Determine whether reduce surge condition via the adjustment of the second air throttle.If reduce surge condition at 330, then method into Enter to 334, to adjust waste gate to realize desired boosting.If however, surge condition is not reduced at 330, then At 332, method 300 includes adjustment anti-surge valve to reduce surge.For example, the opening of anti-surge valve 152 can be increased, with Just the boost air amount in inlet channel 149 is reduced so that surge condition is reduced.

This method is then return to 304, to determine whether engine temperature is less than temperature threshold.If engine temperature is not Less than temperature threshold, if for example, engine temperature is more than temperature threshold at 304, then method 300 enters 336. At 336, method 300 includes stopping that the compressed air of heating is made to be diverted to heat exchanger.For example, once engine has already warmed up simultaneously With enough waste heats to provide heat to heat dissipation vehicle and engine components, then the second air throttle 185 can be adjusted to pass Closed position.However, after the warm-up of the engine, the second air throttle 185 can be used to the control of assisted turbocharger operating, And it is used to reduce the generation of surge event, this will hereinafter be described.

For example, at 338, method 300 includes determining whether increased boosting request occurs.For example, for example, increased liter Pressure request can step on accelerator pedal in response to increased engine load or in response to driver, and (wherein driver forces down acceleration Device pedal is to require the torque of incrementss) and occur.If had occurred at 338 it is increased boosting request, then method 300 into Enter to 340, to adjust one or more waste gate valves to realize desired boosting.For example, in waste gate valve 128 and 138 It is one or more can activated, with meet it is increased boosting ask.For example, the aperture of waste gate valve can reduce, with Just the boost air amount for being supplied to engine is increased, while the second air throttle is maintained at closed position.

If however, increased boosting request does not occur at 338, then method 300 enters 342.At 342, Method 300 includes determining whether the boosting reduced request occurs.For example, the boosting request reduced can be in response to engine load Reduction or in response to driver pine accelerator pedal (wherein driver's accelerator-off to require the torque of reduction amount) And occur.If the boosting request not reduced at 342, then method enters 340, one or more to adjust A waste gate valve is to realize desired boosting.It for example, can be based on one in the variation adjustment engine system for it is expected boosting Or more waste gate valve, while the second air throttle is maintained into closed position.

If the however, boosting request reduced at 342, then method 300 enters 344.At 344, side Method 300 includes adjustment waste gate to realize desired boosting.For example, it can increase one or more useless in engine system The opening of air valve, to reduce the boost air amount for being supplied to engine.However, if waste gate valve is adjusted to completely The boosting of open position and reduction request is not implemented yet, then the second air throttle can be used to auxiliary and meet the reduction Boosting request.Therefore, at 346, method 300 comprises determining whether to realize desired boosting.If not, so method 300 enter 348, to adjust the second air throttle to realize desired boosting.For example, when waste gate valve is opened completely, the Two air throttles can be adjusted to open position from the position completely closed, further to reduce amount of boost, be reduced with meeting Boosting request.

At 350, method 300 includes determining that surge condition whether there is.As described above, determine that surge condition whether there is It can be read based on the pressure of the various sensing systems (for example, sensing system 212,210 and 208) in engine system It is one or more in number, temperature reading and air mass flow reading.Such as, if it is determined that boost pressure is more than pressure threshold simultaneously And determine that the flow of boost air is less than air mass flow threshold value, then surge condition can be identified.As another example, surge The position and the boost air amount of compressor output that the confirmation of situation can be based on air inlet shutter 185.If for example, boosting Air capacity is more than threshold value and if the opening of air inlet shutter 158 is less than threshold quantity, then surge condition can be identified.

If there are surge conditions at 350, then method 300 enters 352, is breathed heavily to adjust anti-surge valve with reducing It shakes situation.For example, the aperture of anti-surge valve 152 can be increased, to reduce the boost air for being transported to inlet channel 149 Amount, to reduce surge condition.At 354, method 300 includes determining whether reduce surge shape via the adjustment of anti-surge valve Condition.If reducing surge condition at 354, method 300 enters 358, to adjust waste gate to realize desired boosting. If however, anti-surge valve be adjusted to completely open position and surge condition there are still, then the second section can be adjusted Valve, to reduce surge condition.Therefore, if not reducing surge condition at 354, then method 300 enters 356, To adjust the second air throttle to reduce surge condition.For example, the opening of the second air throttle can be increased, so as to further subtract Boost air amount in small inlet channel 149, to reduce surge condition.

Fig. 4 shows the exemplary method (for example, method 300 shown in Fig. 3) illustrated for turbocharged engine Exemplary graph, wherein the turbocharged engine, which includes being located at, is coupled in the cylinder air inlet door of compressor outlet and engine Between additional or the second air throttle (for example, second air throttle 185) in pipeline.Graph shows engine temperature at 402 Degree changes with time.Graph shows the compressor delivery pressure change at any time compared with atmospheric pressure 419 at 404 Change.Graph shows that main or the first air inlet shutter 158 position is changed with time at 406, wherein the position from Completely open position (opening) changes to the position (closing) completely closed.Graph shows additional or second at 408 The position of air throttle 185 is changed with time, and is completely closed wherein the position is changed to from completely open position (opening) Position (closing).Graph shows waste gate valve (for example, waste gate valve 138 and/or waste gate valve 128) at 410 Position is changed with time, and (is closed wherein the position changes to the position completely closed from completely open position (opening) It closes).Graph shows that the position of anti-surge valve (for example, valve 152) is changed with time at 412, wherein the position from Completely open position (opening) changes to the position (closing) completely closed.

At time t0 in Fig. 4, occur from static engine cold starting.Between times t 0 and tl, engine is worked as Just in warming-up and when compressor delivery pressure subatmospheric power, the first air inlet shutter and the second air throttle are maintained at Closed position, and waste gate valve is adjusted to completely open position so that control to be aided in be supplied to the boosting of engine.In the time At t1, accelerator pedal is stepped on, therefore increased amount of boost is required.In response, between time t1 and t2, when starting Just in warming-up, the aperture of waste gate valve is reduced to the position completely closed and reaches certain duration machine, to adapt to boost This increase, and the second air throttle is adjusted to completely open position to provide heat to various engines and vehicle heat dissipation portion Part.Within this time, the first air throttle is partially opened, with control to engine air capacity.Whenever compressor outlet When pressure is more than atmospheric pressure (this also causes compressor exit temperature to be more than environment temperature) and work as in the presence of the need to hot-air When will be to heat various engines and vehicle consumption part, the second air throttle can be opened.At the t1 step on accelerator pedal after Certain duration after (afterwards increased boosting request meet), waste gate is adjusted to completely open position again.

At time t2, second steps on accelerator pedal, therefore the increase of compressor delivery pressure is expected to.Therefore, At time t2, the opening of the first air throttle is further augmented, and the second air throttle is maintained at completely open position, with Just continue as engine and vehicle part provides the air of heating.In addition, second at t2 steps at accelerator pedal, waste gate It is adjusted to the position completely closed and reaches certain duration, asked with adapting to the increased boosting at t2.Increased After boosting request meets after time t 2, waste gate is closed again.

At time t3, driver's pine accelerator pedal, therefore the amount of boost reduced is required.In order to adapt to this reduction Boosting request, the opening of the first air throttle is reduced, and the second air throttle and waste gate are maintained at completely open position Put the boost air amount that engine is supplied to further reduction.In order to reduce surge condition, anti-surge valve is stepped in loose accelerator It is opened during plate compared with short duration, shaken to prevent Zhichuan, therefore anti-surge valve quilt after the loose accelerator pedal at time t3 It is adjusted to completely open position and reaches certain duration.Once loose accelerator of the boosting situation reduced at time t3 is stepped on Meet after plate, anti-surge valve is just adjusted to closed position.

At time t4, the second loose accelerator pedal occurs, therefore further reduce of boost pressure is required.At this In example, compressor delivery pressure is decreased under atmospheric pressure, therefore the second air throttle is adjusted to closing at time t4 Position.In addition, the opening of the first air throttle is further decreased, and waste gate valve is maintained at completely open position, with Just the boosting request of reduction is met.Anti-surge valve is opened again certain duration at time t3, to prevent surge.

At t5, determine the abundant warming-up of engine, thus the waste heat from engine can be used for heat various engines and Vehicle consumption part.For example, at time t5, engine temperature is increased on threshold temperature 414.Since engine is in the time Warming-up at t5, so the second air throttle is adjusted to or is maintained at closed position at time t5.

At time t6, accelerator pedal is stepped on, is asked with generating increased boosting.Therefore, at time t6, exhaust gas The aperture of gate valve is reduced, and to provide increased boost air amount to engine, and the second air throttle is maintained at closed position And the aperture of the first air throttle is increased, with control to engine air capacity.

Loose accelerator pedal occurs to generate the boosting request of reduction at time t8, therefore at time t8, waste gate The aperture of valve is increased to or is maintained at completely open position, and anti-surge valve is opened certain duration, to prevent The only surge after loose accelerator pedal.At time t9, another pine accelerator pedal occurs, therefore boost pressure is further Reduction is required.Therefore, at time t9, waste gate is maintained opening, and anti-surge valve is opened again certain duration, It shakes to prevent Zhichuan.

Note that the example process flow included herein can be with various valve systems, engine system and/or vehicle system Under unified central planning put is used together.These example process flows can represent it is any number of processing strategy in it is one or more, it is all Such as event-driven interrupts driving, multitask, multithreading and can be by the similar processing strategy of control system.Therefore, it is described Various actions, operation or function can shown in order, be concurrently performed or be omitted in some cases.Equally, it is real The feature and advantage of present example embodiment described herein are not necessarily required to the processing sequence, but for the ease of figure Show and illustrate and describe and provide the processing sequence.Depending on used specific policy, in shown action or function One or more can be repeatedly executed.In addition, described action can be represented graphically being incorporated into the meter of control system The code of calculation machine readable storage medium storing program for executing.

It should be understood that configuration and process flow herein disclosed is substantially exemplary, and these are specific Embodiment be not to be considered as limiting because many variants are possible.

The theme of the disclosure be included herein disclosed various systems and construction and other features, function and/or All novel and non-obvious combination of property and sub-portfolio.Claims hereof, which particularly points out, some is recognized To be novel and non-obvious combination and sub-portfolio.These claims may relate to "one" element or " first " member Part or its equivalent.These claims are understood to include the combination of one or more this elements, neither require It is not excluded for two or more this elements.Disclosed feature, function, other combinations of element and/or characteristic and sub-portfolio can By changing existing claim or must be claimed by proposing new claim in this or association request.These Claim, it is wider, narrower, identical compared with original claim scope or differ, it is considered to be included in this public affairs In the theme opened.

Claims (17)

1. a kind of method for vehicle operating, it includes：

During the cold-start situation of turbocharged engine, a part of compressed air in compressor downstream is made to be diverted to heat exchange Device；

Vehicle part is heated via the heat exchanger；And

In response to the surge condition during the cold-start situation, make the outlet for being coupled in the compressor and the engine The air throttle in pipeline between interior cylinder air inlet door is opened to fully open position, so that one of the compressor downstream Partial compression air is diverted to the heat exchanger, and opens the outlet of the entrance and the compressor positioned at the compressor Between pipeline in anti-surge valve.

2. according to the method described in claim 1, wherein the first air throttle is arranged on the institute of the outlet downstream of the compressor In the air inlet for stating engine, and a part of compressed air in the compressor downstream is made to be diverted to the heat exchanger and includes cause The second air throttle in the dynamic pipeline between the outlet of the compressor and first air throttle.

3. according to the method described in claim 1, wherein described cold-start situation include engine temperature be less than threshold temperature and The request only heated to the compartment of operator responds and turns a part of compressed air in the compressor downstream To included to heat exchanger make to be located at be coupled in the outlet of the compressor and the in-engine cylinder into The air throttle in the pipeline between valve opens the first amount, and the method further includes in the cold start shape It during condition, is asked in response to increased boosting, the air throttle is made to open the second amount less than first amount, and opens and is located at The waste gate valve being coupled in the pipeline between the outlet of turbine and cylinder exhaust valve.

4. according to the method described in claim 1, wherein described cold-start situation include engine temperature be less than threshold temperature, with And a part of compressed air in the compressor downstream is made to be diverted to the heat exchanger and is included, opening, which is located at, is coupled in institute The air throttle in the pipeline between the outlet of compressor and the in-engine cylinder air inlet door is stated, And the method further includes during the cold-start situation, the boosting in response to reduction is asked, and opens the air throttle To fully open position, and open the waste gate for being located at and being coupled in the pipeline between the outlet of turbine and cylinder exhaust valve Valve.

5. according to the method described in claim 1, wherein described cold-start situation include engine temperature be less than threshold temperature, and And the method further includes be more than the threshold temperature, closing, which is arranged on, is coupled in institute in response to the engine temperature The air throttle in the pipeline between the outlet of compressor and the in-engine cylinder air inlet door is stated, To stop that a part of compressed air in the compressor downstream is made to be diverted to the heat exchanger.

6. according to the method described in claim 5, it is also included, when the engine temperature is more than the threshold temperature, ring The waste gate being coupled in the pipeline between the outlet of turbine and cylinder exhaust valve should be located in increased boosting request, actuating Valve, while the air throttle is maintained into closed position.

7. according to the method described in claim 5, it is also included, when the engine temperature is more than the threshold temperature, ring It should be asked in the boosting of reduction, open the waste gate for being located at and being coupled in the pipeline between the outlet of turbine and cylinder exhaust valve Valve, and open the air throttle.

8. according to the method described in claim 5, it is also included, when the engine temperature is more than the threshold temperature, ring Surge condition described in Ying Yu is opened in the pipeline between the outlet of the entrance and the compressor of the compressor The anti-surge valve, and open the air throttle.

9. a kind of method for being used for the vehicle with turbocharged engine, it includes：

It is less than threshold temperature in response to engine temperature：

The air throttle in pipeline between outlet and the inlet manifold of the engine of the actuating positioned at compressor, so that the pressure A part of compressed air in contracting machine downstream leaves the engine and redirect to heat exchanger；

Vehicle part is heated using the heat exchanger；And

When the engine temperature is less than the threshold temperature, in response to surge condition, make to be coupled in the compressor The air throttle in pipeline between outlet and the in-engine cylinder air inlet door is opened to fully open position, so that described A part of compressed air in compressor downstream is diverted to the heat exchanger, and open entrance positioned at the compressor with it is described The anti-surge valve in pipeline between the outlet of compressor.

10. according to the method described in claim 9, it is also included, when the engine temperature is less than the threshold temperature, ring Accelerator pedal or driver's pine accelerator pedal should be stepped in driver, adjust the air throttle, and activated to be located at and be coupled in The waste gate valve in pipeline between the outlet of turbine and cylinder exhaust valve.

11. according to the method described in claim 9, it is also included, it is more than the threshold temperature in response to the engine temperature, Close the air throttle, with stop make the compressor downstream a part of compressed air be diverted to the heat exchanger and In response to engine operating condition, adjustment is described between the outlet of compressor and the inlet manifold of the engine Air throttle in the engine intake duct of pipe downstream.

12. according to the method for claim 11, also include, when the engine temperature is more than the threshold temperature, Accelerator pedal is stepped in response to driver, actuating, which is located at, to be coupled between the outlet of turbine and the exhaust manifold of the engine Pipeline in waste gate valve, while by positioned at the inlet manifold of the outlet of the compressor and the engine it Between the pipeline in the air throttle maintain closed position.

13. according to the method for claim 11, also include, when the engine temperature is more than the threshold temperature, In response to driver's pine accelerator pedal, opening, which is located at, to be coupled between the outlet of turbine and the exhaust manifold of the engine Pipeline in waste gate valve, and open the outlet and the engine positioned at the compressor the inlet manifold it Between the pipeline in the air throttle.

14. according to the method for claim 11, also include, when the engine temperature is more than the threshold temperature, In response to surge condition, open anti-in the pipeline between the outlet of the entrance and the compressor of the compressor Surge valve, and open the pipeline between the outlet of the compressor and the inlet manifold of the engine In the air throttle.

15. a kind of system for being used for the vehicle with engine, it includes：

Turbocharger, including compressor；

It is described between the inlet valve of the cylinder of the engine to be disposed in exporting for the compressor for first air throttle In the air inlet of engine；

Second air throttle is disposed in the pipeline between the outlet of the compressor and first air throttle；With And

Controller is configured as：

It is less than threshold temperature in response to engine temperature, second air throttle is opened, so that one of the compressor downstream Partial compression air is diverted to heat exchanger；

When the engine temperature is less than the threshold temperature, in response to surge condition, make to be coupled in the compressor The air throttle in pipeline between outlet and the in-engine cylinder air inlet door is opened to fully open position, so that described A part of compressed air in compressor downstream is diverted to the heat exchanger, and open entrance positioned at the compressor with it is described The anti-surge valve in pipeline between the outlet of compressor；And

First air throttle is adjusted based on engine operating condition.

16. system according to claim 15, wherein the controller is further configured to, in response to the engine Temperature is more than the threshold temperature, closes second air throttle to stop a part of compressed air for making the compressor downstream It is diverted to the heat exchanger and first air throttle is adjusted based on engine operating condition.

17. system according to claim 16, wherein the controller is further configured to, when the engine temperature During more than the threshold temperature, in response to surge condition, second air throttle is opened, so that one of the compressor downstream Partial compression air is diverted to the heat exchanger.