WO2012172840A1 - 車両駆動装置および方法 - Google Patents
車両駆動装置および方法 Download PDFInfo
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- WO2012172840A1 WO2012172840A1 PCT/JP2012/055692 JP2012055692W WO2012172840A1 WO 2012172840 A1 WO2012172840 A1 WO 2012172840A1 JP 2012055692 W JP2012055692 W JP 2012055692W WO 2012172840 A1 WO2012172840 A1 WO 2012172840A1
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- WIPO (PCT)
- Prior art keywords
- vehicle
- accelerator pedal
- lockup clutch
- depression
- fuel recovery
- Prior art date
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- 239000000446 fuel Substances 0.000 claims abstract description 138
- 238000011084 recovery Methods 0.000 claims abstract description 126
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0215—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission
- F02D41/022—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the clutch status
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
- B60W10/024—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches including control of torque converters
- B60W10/026—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches including control of torque converters of lock-up clutches
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18072—Coasting
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W50/08—Interaction between the driver and the control system
- B60W50/10—Interpretation of driver requests or demands
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
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- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/10—Introducing corrections for particular operating conditions for acceleration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
- F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
- F02D41/126—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off transitional corrections at the end of the cut-off period
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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- F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/14—Control of torque converter lock-up clutches
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/14—Control of torque converter lock-up clutches
- F16H61/143—Control of torque converter lock-up clutches using electric control means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal position
- B60W2540/103—Accelerator thresholds, e.g. kickdown
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/02—Clutches
- B60W2710/021—Clutch engagement state
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0616—Position of fuel or air injector
- B60W2710/0627—Fuel flow rate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/20—Reducing vibrations in the driveline
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
- F02D2200/602—Pedal position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
- F02D2400/12—Engine control specially adapted for a transmission comprising a torque converter or for continuously variable transmissions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/045—Detection of accelerating or decelerating state
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3064—Controlling fuel injection according to or using specific or several modes of combustion with special control during transition between modes
- F02D41/307—Controlling fuel injection according to or using specific or several modes of combustion with special control during transition between modes to avoid torque shocks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/18—Inputs being a function of torque or torque demand dependent on the position of the accelerator pedal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
Definitions
- the present invention relates to output control of an internal combustion engine related to the operation of a lockup clutch of a vehicle.
- JP 2006-15819A issued in 2006 by the Japan Patent Office, proposes to operate a regenerative brake during fuel recovery.
- the driver may step on the accelerator pedal slightly without being aware of it. Even in such a case, if the lock-up clutch is not released, the speed increase of the engine due to the depression of the accelerator pedal is transmitted to the drive wheels of the vehicle, so that the traveling speed of the vehicle changes. Such changes in travel speed may make the driver and passengers feel uncomfortable.
- an object of the present invention is to mitigate the influence of a slight unintentional operation of an accelerator pedal during coasting on the traveling speed of the vehicle through control of the internal combustion engine.
- the vehicle drive device obtains an output by combustion of fuel supplied in response to depression of the accelerator pedal of the vehicle, while the vehicle is running on a coast where the accelerator pedal is not depressed.
- An internal combustion engine configured to perform fuel cut is provided.
- a torque converter that transmits the output of the internal combustion engine to the drive wheels and a lock-up clutch that directly connects the torque converter during vehicle coasting are provided.
- the vehicle drive device further includes an accelerator pedal depression amount sensor for detecting the depression amount of the accelerator pedal from the coasting of the vehicle and a programmable controller.
- the controller is operated to release the lock-up clutch when the accelerator pedal is depressed from coasting, and to suppress fuel recovery that accompanies the depression of the accelerator pedal until the engagement pressure of the lock-up clutch falls below a predetermined pressure. Is done.
- FIG. 1 is a schematic configuration diagram of a vehicle drive device including a fuel recovery control device according to a first embodiment of the present invention.
- FIG. 2 is a flow chart for explaining a fuel recovery control routine executed by the engine controller according to the first embodiment of the present invention.
- FIG. 3A to 3F are timing charts for explaining the execution results of a fuel recovery control routine executed by the engine controller according to the first embodiment of the present invention for a minute accelerator opening degree equal to or less than a fuel recovery determination value.
- FIG. 4A to 4F are timing charts for explaining the execution results of the fuel recovery control routine executed by the engine controller according to the first embodiment of the present invention for the accelerator pedal opening degree exceeding the fuel recovery determination value.
- FIG. 5 is a flowchart illustrating a fuel recovery control routine executed by the engine controller according to the second embodiment of the present invention.
- FIG. 6A-6F are timing charts for explaining fuel recovery control results executed by the engine controller according to the second embodiment of the present invention at a minute accelerator pedal opening.
- FIG. 7 is a flowchart illustrating a fuel recovery control routine executed by the engine controller according to the third embodiment of the present invention.
- FIG. 8A-8F are timing charts for explaining fuel recovery control results executed by the engine controller according to the third embodiment of the present invention at the minute accelerator pedal opening.
- FIG. 9 is a flowchart for explaining a fuel recovery control routine executed by the engine controller according to the fourth embodiment of the present invention.
- FIG. 10A to 10F are timing charts for explaining fuel recovery control results executed by the engine controller according to the fourth embodiment of the present invention at the minute accelerator pedal opening.
- FIG. 11A-11G are timing charts for explaining the results of fuel recovery at a minute accelerator pedal opening when the fuel recovery control according to the present invention is not applied.
- FIG. 12A to 12F are timing charts for explaining the result of fuel recovery at the accelerator pedal opening degree exceeding the minute level when the fuel recovery control according to the present invention is not applied.
- the vehicle drive device includes an internal combustion engine 1 and a transmission unit 2 that changes the rotational output of the internal combustion engine 1 and outputs it to the propeller shaft 3.
- the internal combustion engine 1 includes an intake throttle 1A and a fuel injector 1B.
- the transmission unit 2 includes a torque converter 2B, an automatic transmission 2A that changes the output rotation of the torque converter 2B, and a hydraulic lockup clutch 2C.
- the torque converter 2B includes a pump impeller coupled to the rotating shaft of the internal combustion engine 1 and a turbine runner coupled to the input shaft of the automatic transmission 2A. Torque is supplied via hydraulic oil interposed between the pump impeller and the turbine runner. It has a known structure for transmission.
- the automatic transmission 2A includes a known planetary gear set having a high clutch and a low brake.
- the engagement and release of the high clutch and the low brake of the lockup clutch 2C and the automatic transmission 2A are performed by using an automatic transmission controller (ATCU) 5 using discharge pressure of a hydraulic pump provided as an auxiliary machine of the internal combustion engine 1. Is done.
- ACU automatic transmission controller
- the opening control of the intake throttle 1A for adjusting the intake air amount of the internal combustion engine 1 and the fuel injection control of the fuel injector 1B of the internal combustion engine 1 are performed by an engine controller (ECU) 4.
- ECU engine controller
- the ECU 4 and the ATCU 5 are each composed of a microcomputer having a central processing unit (CPU), a read-only memory (ROM), a random access memory (RAM), and an input / output interface (I / O interface).
- CPU central processing unit
- ROM read-only memory
- RAM random access memory
- I / O interface input / output interface
- One or both of the ECU 4 and the ATCU 5 can be constituted by a plurality of microcomputers.
- the ECU 4 and the ATCU 5 can be realized by a single microcomputer.
- the ECU 4 includes an accelerator pedal depression amount sensor 6 that detects a depression amount (accelerator opening) of an accelerator pedal included in the vehicle, a vehicle speed sensor 7 that detects a traveling speed of the vehicle, and an engine rotation that detects a rotation speed of the internal combustion engine 1. Detection data is input from the speed sensor 8 through a signal circuit.
- Detection data is input to the ATCU 5 from a shift sensor 9 that detects an operation position of a shift lever included in the vehicle via a signal circuit.
- FIG. 1 The fuel recovery control routine that accompanies the depression of the accelerator pedal during coasting and executed by the ECU 4 will be described with reference to the flowchart of FIG. This routine is repeatedly executed by the ECU 4 while the vehicle is traveling. That is, the next routine execution is started immediately after completion of the routine.
- step S1 the ECU 4 determines whether or not the accelerator opening has increased from zero based on the input data from the accelerator pedal depression amount sensor 6. Specifically, the determination is affirmative when the accelerator opening during the previous routine execution is zero and the accelerator opening during the current routine execution is not zero. This means that the driver has stepped on the accelerator pedal while the vehicle is running on the coast.
- the determination is negative.
- the accelerator opening zero corresponds to the throttle opening when the accelerator pedal is not depressed, that is, when the engine is idling.
- step S1 If the determination in step S1 is negative, the ECU 4 ends the routine without performing the subsequent processing.
- step S1 If the determination in step S1 is affirmative, it means that the driver has stepped on the accelerator pedal while the vehicle is running on the coast.
- the ECU 4 outputs a signal for reducing the hydraulic pressure of the lockup clutch 2C to a predetermined pressure via the ATCU 5 in step S2.
- the predetermined pressure is set to a hydraulic pressure that provides a lockup clutch capacity of the lockup clutch 2C that is slightly below the output torque of the internal combustion engine 1 after fuel recovery.
- the ECU 4 determines whether or not the accelerator opening is equal to or less than the fuel recovery determination value. Specifically, it is determined whether or not the accelerator opening corresponds to a minute accelerator pedal opening that does not cause a shift operation of the automatic transmission 2A. For example, the fuel recovery determination value is set to 0.5 / 8 when the maximum accelerator opening is set to 8/8.
- step S3 If the determination in step S3 is negative, the ECU 4 performs fuel recovery in step S7, thereby increasing the fuel injection amount with a good response to the output increase request of the internal combustion engine 1 indicated by the depression of the accelerator pedal. increase.
- the determination in step S3 is negative when the accelerator pedal is clearly depressed, such as during kickdown.
- step S3 If the determination in step S3 is affirmative, the ECU 4 prohibits fuel recovery in step S4. After the process of step S4, the ECU 4 performs the determination of step S5.
- step S5 the ECU 4 determines whether or not the engagement pressure of the lockup clutch 2C has decreased to the predetermined pressure commanded in step S2. This determination can be made by various methods.
- a direct method is to measure the fastening pressure of the lock-up clutch 2C using the pressure sensor 10 and compare it with a predetermined pressure. By this method, the engagement pressure of the lockup clutch 2C can be grasped reliably.
- step S2 it can be performed by determining whether or not the elapsed time since the process of step S2 has reached a predetermined time. For a predetermined time, the time required from when the signal for instructing the pressure reduction to the predetermined pressure is output to the lockup clutch 2C until the engagement pressure of the lockup clutch 2C actually decreases to the predetermined pressure is measured in advance, Determine based on.
- the pressure sensor 10 that detects the engagement pressure of the lockup clutch 2C can be omitted.
- the rotational speed of the pump impeller of the torque converter 2B that is, the rotational speed Ne of the internal combustion engine 1 detected by the engine rotational speed sensor 8 and the rotational speed Nt of the turbine runner of the torque converter 2B are detected, and the difference between these values. It is also possible to make the above determination based on whether or not the absolute value of the slip rotation speed exceeds a predetermined rotation speed.
- the rotational speed Nt of the turbine runner is calculated from the vehicle traveling speed detected by the vehicle speed sensor 7 and the position of the shift lever detected by the shift sensor 9.
- the predetermined rotation speed is determined on the basis of the result obtained by conducting an experiment or simulation in advance to determine the slip rotation speed at the predetermined pressure commanded in step S2. Even in this determination method, the pressure sensor 10 can be omitted.
- step S5 If it is determined in step S5 that the hydraulic pressure of the lock-up clutch 2C has decreased to a predetermined pressure, the lock-up clutch 2C is released to the extent that the torque converter 2B can absorb the change in engine speed due to fuel recovery. Means that In this case, the ECU 4 performs fuel recovery in step S7. After performing fuel recovery, the ECU 4 ends the routine.
- step S5 if it is determined in step S5 that the hydraulic pressure of the lockup clutch 2C has not decreased to the predetermined pressure, the ECU 4 determines in step S6 whether the rehabilitation delay condition is satisfied.
- the accelerator opening exceeds the fuel recovery determination value 0.5 / 8.
- the accelerator opening exceeds 0.5 / 8 of the fuel recovery determination value, it means that the accelerator opening has exceeded the accelerator opening range to be subjected to the rehabilitation delay control.
- the ECU 4 performs fuel recovery in step S7. After performing fuel recovery, the ECU 4 ends the routine. Even if the accelerator opening is 0.5 / 8 or less of the fuel recovery judgment value at the start of routine execution, if the accelerator opening exceeds 0.5 / 8 of the fuel recovery judgment value during routine execution, Fuel recovery is immediately executed when the determination of S6 changes from negative to positive. Thereby, the responsiveness with respect to accelerator pedal operation under the acceleration intention can be ensured.
- step S6 If it is determined in step S6 that the accelerator opening does not exceed the fuel recovery determination value 0.5 / 8, the ECU 4 determines that the recovery delay condition is satisfied. In this case, the ECU 4 repeats the processing after step S4 and continues the recovery delay.
- this routine immediately starts the process of lowering the fastening pressure of the lockup clutch 2C for a slight operation of the accelerator pedal during coasting, while the recovery from the fuel cut is performed in the lockup clutch. Until the tightening pressure is reduced to a level capable of absorbing the torque shock. Accordingly, it is possible to alleviate the influence of a slight unintentional operation of the accelerator pedal during coasting on the traveling speed and to prevent the driver and passengers from feeling uncomfortable.
- the accelerator opening is FIG. It is held at zero as shown in 3A.
- ATCU5 is FIG. 3D, the engagement pressure of the lock-up clutch 2C is maintained, and the FIG. As shown in 3C, the lockup clutch capacity is maintained at the value of the engaged state.
- the lock-up clutch capacity means the maximum torque that the lock-up clutch 2C can transmit in the current engaged state.
- step S1 In the fuel recovery control routine executed in this state, the determination in step S1 is negative, so fuel recovery is not executed and the fuel cut state continues.
- step S1 When the driver slightly depresses the accelerator pedal at time t1, the determination in step S1 is affirmed in the fuel recovery control control routine executed immediately after. As a result, in step S2, the ECU 4 passes through the ATCU 5 to the FIG. As shown in 3D, a command signal for lowering the engagement pressure is output to the lockup clutch 2C. Even if the fastening pressure command value decreases stepwise due to a delay in the response of the hydraulic pressure generating the fastening pressure, FIG. The actual fastening pressure and the FIG. All of the actual lockup capacities shown by the 3C broken line decrease only in an inclined manner.
- step S3 When the accelerator pedal is depressed slightly, the determination in step S3 is affirmative in the fuel recovery control control routine, and fuel recovery is prohibited in step S4. Therefore, fuel recovery prohibition in step S4 is continuously executed until the engagement pressure of the lockup clutch 2C becomes equal to or lower than the predetermined pressure at time t2.
- step S5 When the engagement pressure of the lockup clutch 2C becomes equal to or lower than the predetermined pressure at time t2, the determination in step S5 is positively changed. As a result, a fuel recovery operation is executed in step S7, and fuel supply to the internal combustion engine 1 is resumed.
- FIG. 3C the engine torque increases at time t2, and FIG. As shown in 3B, the engine rotational speed Ne also increases.
- FIG. As indicated by 3C and 3D the lockup clutch 2C is released. Therefore, FIG. As shown in 3B, the engine rotational speed Ne will soon exceed the rotational speed Nt of the turbine runner, which is the input rotational speed of the automatic transmission 2A.
- the slip rotation speed that is the difference between these speeds is shown in FIG. Increased temporarily as shown in 3E. However, since the speed difference is absorbed by the torque converter 2B, the slip rotation speed temporarily increases and then converges to zero.
- FIG. 3F Acceleration in the longitudinal direction of the vehicle is FIG. As shown in 3F, while maintaining a constant deceleration during coasting, the deceleration starts to be reduced at time t1 when a command for lowering the command value for the engagement pressure of the lockup clutch 2C is output. Then, the deceleration smoothly decreases toward zero until the vehicle speed becomes constant after time t2.
- Fig. Referring to 11A-11G, the vehicle when the accelerator pedal is stepped slightly to the extent that the fuel recovery judgment value is not reached while the vehicle is running on the coast, and the fuel recovery control routine according to the present invention is not executed. The behavior of will be described.
- the lockup clutch is locked up during coasting, that is, when the internal combustion engine has a negative driving force.
- This state is referred to as a coast lock-up state mCSTSLT.
- the ECU 4 passes the AT.
- a command value for lowering the engagement pressure is output to the lockup clutch 2C.
- the ECU 4 performs fuel recovery.
- the engine torque is FIG.
- the increase starts from time t1.
- the state after time t1 corresponds to a drive slip state mSLP in which the drive travels, that is, the driving force of the internal combustion engine is positive and the lockup clutch slips.
- the engagement pressure is FIG. As shown by the broken line 11E, it decreases only in an inclined manner. Therefore, FIG. The lock-up clutch capacity shown in 11D also decreases only in an inclined manner.
- FIG. As shown in the region surrounded by the one-dot chain line of 11G, the acceleration in the front-rear direction of the vehicle suddenly changes and shocks the vehicle body, making the driver and passengers feel uncomfortable.
- FIG. The execution result of the fuel recovery control routine executed by the ECU 4 when the accelerator pedal is depressed until the fuel recovery determination value exceeds 0.5 / 8 will be described with reference to 4A-4F.
- step S1 the determination in step S1 is positive in the fuel recovery control control routine that is executed immediately thereafter.
- step S2 the ECU 4 passes the FIG. As shown in 4D, a command value for lowering the engagement pressure is output to the lockup clutch 2C. Due to a delay in hydraulic response, the FIG. The actual fastening pressure and the FIG. Both the lock-up clutch capacities shown by the 4C broken line decrease only in an inclined manner.
- step S6 Since the determination in step S6 is negative until the accelerator opening exceeds 0.5 / 8, the prohibition of fuel recovery in step S4 is continued.
- step S6 When the accelerator opening exceeds 0.5 / 8 at time t3, the determination in step S6 is positive, and fuel recovery is executed in step S7. In the subsequent routine execution, the determination in step S3 is negative, so the fuel recovery is continued.
- FIG. As shown in 4C, the engine torque increases at time t3, and thereafter, engine torque corresponding to the amount of depression of the accelerator pedal is generated.
- FIG. 5 With reference to FIG. 5, a fuel recovery control routine executed by the ECU 4 according to the second embodiment of the present invention will be described. This routine is the same as the FIG. This is executed instead of the fuel recovery control routine of No. 2. Therefore, the routine execution conditions are the same as those in the first embodiment.
- FIG. 1 The difference between the routine No. 2 and the fuel recovery control routine is that step S4A is provided instead of step S4.
- step S4A The processing of steps S1-S3 and steps S5-S7 is the same as FIG. This is the same as the routine 2.
- step S3 If the determination in step S3 is affirmative, the ECU 4 prohibits fuel recovery for half of the cylinders of the internal combustion engine 1 in step S4A. That is, when the internal combustion engine 1 has eight cylinders, fuel recovery is prohibited for the four cylinders, and fuel recovery is performed for the remaining four cylinders.
- the number of cylinders for which fuel recovery is prohibited is not necessarily half of the total number of cylinders. Even by prohibiting fuel recovery of some cylinders, the output of the internal combustion engine 1 can be kept small compared to the case of performing fuel recovery for all cylinders.
- step S4A fuel recovery is prohibited in half of the cylinders.
- step S1 the determination in step S1 is affirmed in the fuel recovery control control routine that is executed immediately thereafter.
- step S2 the ECU 4 passes through the ATCU 5 to the FIG.
- a command value for lowering the engagement pressure is output to the lockup clutch 2C. Due to a delay in hydraulic response, the FIG. The actual fastening pressure and the FIG. Both the lock-up capacities shown by the 6C broken line decrease only in an inclined manner.
- step S3 the determination in step S3 becomes affirmative, and fuel recovery of half the cylinders is prohibited in step S4A.
- the engine torque is FIG.
- 6C it is slightly increased compared to coasting. In this state, the lock-up clutch 2C maintains a high clutch capacity, but the increase in engine torque is small.
- 6F the longitudinal acceleration of the vehicle increases stably without showing any vertical movement.
- FIG. 6B the engine rotational speed Ne may decrease as the lockup clutch 2C is released.
- the engine rotational speed Ne associated with the release of the lockup clutch 2C is reduced. There is no decline.
- FIG. 7 With reference to FIG. 7, a fuel recovery control routine executed by the ECU 4 according to the third embodiment of the present invention will be described. This routine is the same as the FIG. This is executed instead of the fuel recovery control routine of No. 2. Therefore, the routine execution conditions are the same as those in the first embodiment.
- FIG. 2 The difference between the routine No. 2 and this fuel recovery control routine is that step S4B is provided instead of step S4, and step S7B is provided instead of step S7.
- step S4B is provided instead of step S4
- step S7B is provided instead of step S7.
- the other steps are processed in FIG. This is the same as the routine 2.
- step S4B the ECU 4 prohibits fuel recovery in all the cylinders and prohibits the opening of the intake throttle 1A, that is, the increase of the throttle opening. Since the intake throttle 1A is linked to the accelerator pedal, the throttle opening increases when the accelerator pedal is depressed. In step S4B, the increase of the throttle opening is also prohibited together with the prohibition of fuel recovery.
- step S7B the ECU 4 executes fuel recovery and cancels the prohibition of increasing throttle opening. As a result, the fuel supply to the internal combustion engine 1 is resumed, and the opening degree of the intake throttle 1A is increased to an opening degree corresponding to the depression amount of the accelerator pedal.
- FIG. 8A-8F The execution result of the fuel recovery control routine according to the third embodiment will be described with reference to 8A-8F.
- FIG. 8A if the throttle opening is increased during the recovery delay period from time t1 to time t2, fuel recovery is executed at time t2, and at the same time, FIG. As shown by the solid line of 8C, the output torque increases rapidly.
- the torque step at time t2 can be reduced.
- the shock caused by the torque step can be suppressed.
- the intake air amount at the time of fuel recovery is suppressed to a small value, the blow-up of the rotation of the internal combustion engine 1 immediately after the fuel recovery is also suppressed, so that the subsequent re-engagement of the lockup clutch 2C can be performed smoothly.
- FIG. 9 With reference to FIG. 9, a fuel recovery control routine executed by the ECU 4 according to the fourth embodiment of the present invention will be described. This routine is executed instead of the fuel recovery control routine of the first embodiment.
- the execution conditions are the same as those in the first and second embodiments.
- Step S2A is provided instead of step S2 of the second routine. If the determination in step S6 is negative, the process is not re-executed from step S4, but the process is re-executed from step S2A.
- step S2A when the ECU 4 outputs a command value for lowering the engagement pressure to the lockup clutch 2C, the ECU 4 proceeds to the engagement pressure command value and adds correction. Specifically, the lowering of the engagement pressure of the lock-up clutch 2C is accelerated by giving a value lower than a predetermined pressure as the engagement pressure command value. After that, the ECU 4 performs feedback control of the engagement pressure through the repetition of the processes of steps S2A to S6 so that the engagement pressure of the lockup clutch 2C finally becomes a predetermined pressure. As a result, the process of step S2A is repeatedly executed during a period from time t1 when the accelerator pedal is depressed to time t2 when the engagement pressure of the lockup clutch 2C decreases to a predetermined pressure.
- FIG. 10 executed by the ECU 4 according to the third embodiment under a minute accelerator opening that is equal to or smaller than the fuel recovery determination value. An execution result of the fuel recovery control control routine No. 8 will be described.
- step S4A the output reduction process of the internal combustion engine 1 in step S4A is continued, and FIG.
- FIG. 10C the engine torque is suppressed to a low value until the engagement pressure of the lockup clutch 2C is reduced to a predetermined pressure. Therefore, the longitudinal acceleration of the vehicle is FIG. As shown in 10F, it rises smoothly, and no shock is generated by the engine torque increasing while the lock-up clutch 2C is in a substantially engaged state.
- the output reduction period of the internal combustion engine 1 from the time t1 to the time t2 is shortened by proceeding to the engagement pressure command value of the lockup clutch 2C and adding correction. Therefore, the response time from when the accelerator pedal is depressed to when the vehicle traveling speed increases can be shortened.
- the present invention suppresses fuel recovery of the internal combustion engine until the engagement pressure of the lock-up clutch 2C becomes equal to or lower than a predetermined pressure when the accelerator pedal is depressed while the vehicle is running on the coast. Therefore, the output of the internal combustion engine 1 increases while the lock-up clutch 2C is in a substantially engaged state, thereby affecting the vehicle speed and preventing the driver and passengers from feeling uncomfortable. .
- the vehicle drive device can eliminate the uncomfortable feeling that fuel recovery gives to the passenger via the lock-up clutch. Therefore, for example, there is a favorable effect for improving the riding comfort of a passenger car.
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Abstract
Description
Claims (12)
- 車両のアクセルペダルの踏み込みに応じて供給される燃料の燃焼により出力を得る一方、アクセルペダルの踏み込まれない車両のコースト走行中はフュエルカットを行うように構成された内燃エンジン(1)と;
内燃エンジン(1)の出力をポンプインペラとタービンランナを介して駆動輪に伝達するトルクコンバータ(2B)と;
車両のコースト走行中にポンプインペラとタービンランナとを直結するロックアップクラッチ(2C)と;
車両のコースト走行からのアクセルペダルの踏み込みを検出するアクセルペダル踏み込み量センサ(6)と、
次のようにプログラムされたプログラマブルコントローラ(4):
車両のコースト走行からのアクセルペダルの踏み込みに対してロックアップクラッチ(2C)を解放操作し;
アクセルペダルの踏み込みに伴うフュエルリカバリをロックアップクラッチ(2C)の締結圧が所定圧に低下するまで抑制する;
とを備える車両駆動装置。 - コントローラ(4)は、アクセルペダルの踏み込みに伴うフュエルリカバリをロックアップクラッチ(2C)の締結圧が所定圧に低下するまで禁止するよう、さらにプログラムされる、請求項1の車両駆動装置。
- 内燃エンジン(1)は多気筒エンジンであり、コントローラ(4)は、一部の気筒についてのみ、アクセルペダルの踏み込みに伴うフュエルリカバリをロックアップクラッチ(2C)の締結圧が所定圧に低下するまで禁止するよう、さらにプログラムされる、請求項2の車両駆動装置。
- コントローラ(4)は、コースト走行からのアクセルペダルの踏み込み量が所定量を超える場合には、フュエルリカバリを抑制しないよう、さらにプログラムされる、請求項1から3のいずれかの車両駆動装置。
- 内燃エンジン(1)は吸気スロットル(1A)を備え、吸気スロットル(1A)が調整した吸入空気量に応じた供給燃料により出力を得る_とともに、コントローラ(4)はフュエルリカバリの抑制中は、吸気スロットル(1A)の開度の増大を禁止するよう、さらにプログラムされる、請求項1から4のいずれかの車両駆動装置。
- コントローラ(4)は、ロックアップクラッチ(2C)の締結圧低下指令信号の出力により、ロックアップクラッチ(2C)の解放操作を行うとともに、車両のコースト走行からのアクセルペダルの踏み込みに対して締結圧低下指令信号に進み補正を加えるよう、さらにプログラムされる、請求項1から5のいずれかの車両駆動装置。
- コントローラ(4)は、ロックアップクラッチ(2C)の締結圧が低下したかどうかを、ロックアップクラッチ(2C)の解放操作開始からの経過時間に基づき判定するよう、さらにプログラムされる、請求項1から6のいずれかの車両駆動装置。
- ロックアップクラッチの締結圧を検出するセンサ(10)をさらに備え、コントローラ(4)はロックアップクラッチ(2C)の締結圧が所定圧以下に低下した時に、ロックアップクラッチ(2C)の締結圧が低下したと判定するよう、さらにプログラムされる、請求項1から6のいずれかの車両駆動装置。
- ポンプインペラとタービンランナとのスリップ回転速度を検出するセンサ(8,9)をさらに備え、コントローラ(4)はスリップ回転速度が所定速度以上となった時に、ロックアップクラッチ(2C)の締結圧が低下したと判定するよう、さらにプログラムされる、請求項1から6のいずれかの車両駆動装置。
- コントローラ(4)は、ロックアップクラッチ(2C)の締結圧が低下していない場合でも、アクセルペダルの踏み込み量が所定量を超えた時点で、フュエルリカバリの抑制を解除するよう、さらにプログラムされる、請求項1から9のいずれかの車両駆動装置。
- 車両のアクセルペダルの踏み込みに応じて供給される燃料の燃焼により出力を得る一方、アクセルペダルの踏み込まれない車両のコースト走行中はフュエルカットを行うように構成された内燃エンジン(1)と;
内燃エンジン(1)の出力をポンプインペラとタービンランナを介して駆動輪に伝達するトルクコンバータ(2B)と;
車両のコースト走行中にポンプインペラとタービンランナとを直結するロックアップクラッチ(2C)と;
車両のコースト走行からのアクセルペダルの踏み込みを検出するアクセルペダル踏み込み量検出手段(6)と;
車両のコースト走行からのアクセルペダルの踏み込みに対してロックアップクラッチを解放操作するロックアップクラッチ解放操作手段(4,S2,S2A)と;
アクセルペダルの踏み込みに伴うフュエルリカバリをロックアップクラッチの締結圧が所定圧に低下するまで抑制するリカバリ抑制手段(4,S4,S4A)と;
を備える車両駆動装置。 - 車両のアクセルペダルの踏み込みに応じて供給される燃料の燃焼により出力を得る一方、アクセルペダルの踏み込まれない車両のコースト走行中はフュエルカットを行うように構成された内燃エンジン(1)と、内燃エンジン(1)の出力をポンプインペラとタービンランナとを介して駆動輪に伝達するトルクコンバータ(2B)と、車両のコースト走行中にポンプインペラとタービンランナとを直結するロックアップクラッチ(2C)とを備えた車両、に適用され、
車両のコースト走行からのアクセルペダルの踏み込みを検出し、
車両のコースト走行からのアクセルペダルの踏み込みに対してロックアップクラッチ(2C)を解放操作し、
アクセルペダルの踏み込みに伴うフュエルリカバリをロックアップクラッチ(2C)の締結圧が所定圧に低下するまで抑制する、車両駆動方法。
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BR112013030327-1A BR112013030327B1 (pt) | 2011-06-15 | 2012-03-06 | dispositivo de acionamento de veículo e método de acionamento de veículo |
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- 2012-03-06 US US14/126,232 patent/US9050964B2/en active Active
- 2012-03-06 EP EP12800924.8A patent/EP2722512B1/en active Active
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- 2012-03-06 KR KR1020137032864A patent/KR101594234B1/ko not_active IP Right Cessation
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JP2014185732A (ja) * | 2013-03-25 | 2014-10-02 | Jatco Ltd | 車両制御装置 |
WO2015036396A1 (en) * | 2013-09-11 | 2015-03-19 | Jaguar Land Rover Limited | Vehicle controller and method |
CN105555628A (zh) * | 2013-09-11 | 2016-05-04 | 捷豹路虎有限公司 | 车辆控制器及方法 |
US9694822B2 (en) | 2013-09-11 | 2017-07-04 | Jaguar Land Rover Limited | Vehicle controller and method |
US9815466B2 (en) | 2014-09-03 | 2017-11-14 | Nissan Motor Co., Ltd. | Lock-up clutch control device for vehicle |
JP2017053466A (ja) * | 2015-09-11 | 2017-03-16 | ジヤトコ株式会社 | 車両用駆動装置及び車両用駆動装置の制御方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20140008456A (ko) | 2014-01-21 |
BR112013030327B1 (pt) | 2021-03-16 |
RU2563307C2 (ru) | 2015-09-20 |
EP2722512A1 (en) | 2014-04-23 |
KR101594234B1 (ko) | 2016-02-15 |
JPWO2012172840A1 (ja) | 2015-02-23 |
RU2014101055A (ru) | 2015-07-27 |
BR112013030327A2 (pt) | 2017-11-07 |
US9050964B2 (en) | 2015-06-09 |
MX2013012856A (es) | 2013-12-02 |
CN103502611B (zh) | 2017-02-15 |
EP2722512A4 (en) | 2016-07-20 |
MY157392A (en) | 2016-06-15 |
EP2722512B1 (en) | 2017-12-06 |
CN103502611A (zh) | 2014-01-08 |
JP5764657B2 (ja) | 2015-08-19 |
US20140129103A1 (en) | 2014-05-08 |
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