WO2011089818A1 - 車両のための制御装置及び方法 - Google Patents
車両のための制御装置及び方法 Download PDFInfo
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- WO2011089818A1 WO2011089818A1 PCT/JP2010/073155 JP2010073155W WO2011089818A1 WO 2011089818 A1 WO2011089818 A1 WO 2011089818A1 JP 2010073155 W JP2010073155 W JP 2010073155W WO 2011089818 A1 WO2011089818 A1 WO 2011089818A1
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- Prior art keywords
- engine
- oil pump
- transmission
- clutch
- vehicle
- Prior art date
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- 238000000034 method Methods 0.000 title claims description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 75
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 230000007935 neutral effect Effects 0.000 claims abstract description 15
- 239000003921 oil Substances 0.000 claims description 113
- 239000000446 fuel Substances 0.000 claims description 14
- 239000010720 hydraulic oil Substances 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 230000035939 shock Effects 0.000 abstract description 9
- 230000009467 reduction Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 description 22
- 230000007423 decrease Effects 0.000 description 10
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Images
Classifications
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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
- B60W10/04—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
-
- 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
-
- 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
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
- B60W10/11—Stepped gearings
- B60W10/115—Stepped gearings with planetary gears
-
- 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
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
-
- 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
- B60W30/192—Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
- F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
- F02N11/0833—Vehicle conditions
-
- 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
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
- F16H61/0031—Supply of control fluid; Pumps therefore using auxiliary pumps, e.g. pump driven by a different power source than the engine
-
- 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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
-
- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/50—Signals to an engine or motor
-
- 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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/10—Change speed gearings
- B60W2510/107—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/70—Gearings
- B60Y2400/76—Automatic gearshift to neutral
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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
-
- 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
-
- 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
- F16H2312/00—Driving activities
- F16H2312/02—Driving off
-
- 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
- F16H2312/00—Driving activities
- F16H2312/14—Going to, or coming from standby operation, e.g. for engine start-stop operation at traffic lights
-
- 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
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to a control device for a vehicle that drives an electric oil pump in accordance with automatic stop of an engine when the vehicle is stopped.
- the present invention relates to a technique for preventing the reduction in durability of an automatic transmission caused by a clutch slip or the like which can occur when the electric oil pump has a failure (drive failure) and forced start of the engine which is automatically stopped.
- idle stop is performed to stop fuel supply and automatically stop the engine under predetermined conditions such as stopping the vehicle temporarily by waiting for a signal, for example.
- Control devices for vehicles are known.
- a hydraulic oil (referred to as a shift hydraulic pressure) necessary for hydraulic control to be supplied to an automatic transmission by a mechanical oil pump mechanically driven by the engine is secured.
- the mechanical oil pump is naturally stopped in accordance with the stop of the engine, so that it is not possible to secure the transmission hydraulic pressure. That is, the hydraulic pressure for transmission in the hydraulic control circuit provided in the automatic transmission is lowered and the hydraulic pressure is insufficient, and the transmission engages in-gear (the so-called low gear) of the forward gears (gear stages). As it is) or in a partially engaged state in which the forward clutch (also called just a clutch) is released.
- Patent Document 2 a control device of a vehicle that forcibly restarts the engine immediately after the automatic stop of the engine is detected when a failure (drive failure) of the electric oil pump operated according to the automatic stop of the engine is detected.
- a failure drive failure
- the shift hydraulic pressure can not be secured. Therefore, the engine is forcedly started immediately after the engine is automatically stopped to operate the mechanical oil pump.
- the present invention is intended to minimize the reduction in the transmission hydraulic pressure accompanying the stop of the engine.
- the present invention has been made in view of the above-described points, and it is possible to generate a clutch that can be generated due to a lack of hydraulic pressure of hydraulic oil supplied to an automatic transmission when the electric oil pump operated in response to the automatic stop of the engine is broken. It is an object of the present invention to provide a control device and method for a vehicle in which the reduction in durability of an automatic transmission due to an engagement shock, a clutch slip or the like is minimized.
- the present invention is a control device (8) for a vehicle, wherein the vehicle (1) comprises an engine (2) operated by combustion of fuel and an electric motor operated by electrical energy.
- a gear shift having a motor (3) as a motive power source for vehicle travel, and further disposed in a power transmission mechanism between at least one of the engine (2) and the electric motor (3) and the drive wheel (W) Machine (6), a mechanical oil pump (11) driven by the engine (2) for supplying hydraulic fluid to the transmission (6), and an electric motor for supplying hydraulic fluid to the transmission (6) And (13) an electric oil pump (12) driven by the motor-driven oil pump (12), the control device (8) automatically stopping the engine (2) under predetermined conditions (S1, S2) , If the electric oil pump (12) is broken If the electric oil pump (12) is determined to have a failure by the failure determination unit (S4, S5) that determines whether or not the electric oil pump (12) has a failure, the engine (2) is engaged when being automatically stopped.
- a forced start unit (S7, S11 to S15) that forcibly cancels the automatically stopped engine (2) after releasing the shift speed and releasing the clutch, and setting the transmission (6) to the neutral state.
- a control device for a vehicle comprising a reengaging portion (S18) for reengaging a gear and engaging a clutch.
- the electric oil pump (12) when the engine (2) is automatically stopped under predetermined conditions, it is determined whether or not the electric oil pump (12) is broken, and the electric oil pump (12) is broken. Automatically performs the release of the shift stage and the release of the clutch engaged at the time of the automatic stop of the engine (2) to set the transmission (6) in the neutral state and then forcibly start the engine (2). Then, the hydraulic pressure of the hydraulic oil supplied to the transmission (6) is sufficiently secured by the operation of the mechanical oil pump (11) accompanying the forced start of the engine (2), and then the released gear position reengaged And the clutch was engaged.
- the outgear (disengagement) of the in-gear (engaged) gear and the release of the clutch are performed to bring the transmission into the neutral state, and then the engine is forcibly started.
- the hydraulic pressure supplied to the transmission is sufficiently secured by the operation of the mechanical oil pump accompanying the restart of the engine, and then the in-gear (re-engagement) of the gear and the engagement of the clutch are performed. Therefore, it is possible to prevent the decrease in durability of the automatic transmission caused by the engagement shock of the clutch and the clutch slip due to lack of oil pressure that can occur immediately upon forced start of the automatically stopped engine. .
- FIG. 1 is a schematic view showing an embodiment of a power transmission system of a hybrid vehicle to which a control device for a vehicle according to the present invention is applied. It is a flowchart which shows one Example of an engine control process. It is a flow chart which shows one example of engine forced start processing. It is a time chart of engine automatic stop and engine forced start. It is a characteristic view of a hydraulic pressure interpolation map which shows the relation between hydraulic fluid temperature and a hydraulic pressure integrated rotation value.
- FIG. 1 is a schematic view showing an embodiment of a power transmission system of a hybrid vehicle 1 to which a control device for a vehicle according to the present invention is applied.
- engine 2 and motor 3 capable of generating electric power (hereinafter referred to as a motor generator to be distinguished from electric motor 13 described later) are directly connected.
- the driving force generated by at least one is transmitted to the output shaft 6a via the main shaft MS, the torque converter 5 provided with the lockup clutch 4, the multi-stage automatic transmission 6, and the like.
- the driving force transmitted to the output shaft 6a is further transmitted to the drive wheel W of the vehicle via a differential mechanism (not shown) or the like to rotate the drive wheel W. That is, the main shaft MS and the output shaft 6a form a power transmission path for transmitting the driving force generated by at least one of the engine 2 and the motor generator 3 to the drive wheel W of the vehicle.
- the engine 2 that generates the driving force is, for example, a multi-cylinder reciprocating type engine, and has a fuel injection / ignition control device 7 that performs fuel injection control for each cylinder and ignition control of the injected fuel.
- a fuel injection / ignition control device 7 that performs fuel injection control for each cylinder and ignition control of the injected fuel.
- an electronically controlled throttle system (so-called drive by wire system, DBW system for short) is adopted, and the operation of the throttle valve (not shown) of the engine 2 is based on the depression amount of the accelerator pedal. It is electronically controlled by the engine ECU 8 (engine electronic control unit). Further, the operation of the fuel injection / ignition control device 7 is controlled by the engine ECU 8.
- the engine ECU 8 is a microcomputer including a CPU, a ROM, a RAM, an input / output interface and the like, and realizing a predetermined function according to various control programs stored in the ROM while using a temporary storage function of the RAM. .
- the engine ECU 8 functions as a control device for a vehicle according to the present invention, and by executing an engine control process (see FIG. 2) to be described later, the engine 2 is controlled under predetermined conditions.
- the operation of the fuel injection / ignition control device 7 etc. is controlled to perform automatic stop and forced start.
- the engine ECU 8 is provided with a brake switch 16 for detecting whether or not the brake pedal is depressed, an accelerator pedal sensor 17 for detecting the depression amount of the accelerator pedal, and an output for transmitting the number of revolutions of the engine 2 or the rotation of the engine 2 Output signals from an engine (or main shaft) rotation number sensor 18 for detecting the rotation number of the shaft (main shaft MS), an output shaft rotation number sensor 19 for detecting the rotation number of the output shaft 6a of the transmission 6, etc. It has become so.
- the speed of the vehicle may be calculated based on the number of rotations of the output shaft 6a detected by the output shaft rotation speed sensor 19, or a dedicated speed sensor may be used.
- the torque converter 5 performs torque transmission between the output shaft of the motor generator 3 and the input shaft of the transmission 6 via a fluid in a state where the lockup clutch 4 is released, and engages the lockup clutch 4. Then, the output shaft of the motor generator 3 and the input shaft of the transmission 6 are substantially directly connected, and torque is directly transmitted between the output shaft and the input shaft regardless of the fluid. .
- the engagement / release of the lockup clutch 4 and the shift of the transmission 6 are performed by hydraulic control in the hydraulic control circuit 20.
- the hydraulic control circuit 20 is, as is well known, a manual valve (not shown) which is moved in conjunction with a driver's seat shift lever to switch hydraulic fluid (ATF) to an oil passage serving as forward, neutral and reverse.
- a regulator valve (not shown) that supplies a predetermined line pressure generated by adjusting the discharge pressure of the mechanical oil pump 11 to the manual valve, and a plurality of shift valves that control the oil path and oil pressure according to the gear position Not shown), a plurality of solenoid valves (not shown) for controlling the pilot pressure of the shift valve, etc., and clutches and brakes of the transmission 6 (any (Not shown) to automatically control the gear position of the transmission 6 for optimum control.
- the manual valve, the regulator valve, the shift valve, and the solenoid valve are controlled by the transmission ECU 21.
- the high voltage battery 10 is charged via the motor generator 3 and the power drive unit (PDU) 9.
- the motor generator 3 performs a regeneration operation to recover kinetic energy of the vehicle body as electrical energy.
- the power running and regeneration of the motor generator 3 are controlled by the engine ECU 8 through the PDU 9.
- the PDU 9 and the high voltage battery 10 are connected to the low voltage battery (power supply) 15 via the DC / DC converter 23 and can step down the voltage to charge the low voltage battery 15.
- the remaining capacity meter 24 detects the remaining capacity of the low voltage battery 15, and outputs the detected remaining capacity (detected value) to the engine ECU 8.
- the engine ECU 8 controls the DC / DC converter 23 based on the detection value of the remaining capacity meter 24 to charge the low voltage battery 15. It is also possible to use a capacitor instead of the high voltage battery 10.
- the hybrid vehicle 1 includes a mechanical oil pump 11 and an electric oil pump 12 having a smaller capacity than the mechanical oil pump 11 as a hydraulic pressure supply source to the hydraulic control circuit 20.
- the mechanical oil pump 11 is connected to the output shaft (main shaft MS) of the engine 2 and is mechanically driven by the driving force of the engine 2 or the motor generator 3.
- the electric oil pump 12 is operated by the electric motor 13 and basically operated when the engine 2 and the motor generator 3 are stopped and the mechanical oil pump 11 can not be operated.
- the engine ECU 8 supplies electric power of the low voltage battery 15 via the pump driver 14 to start the electric motor 13 to operate the electric oil pump 12 while the engine
- the power supply of the low voltage battery 15 via the pump driver 14 is stopped to stop the electric motor 13 to stop the electric oil pump 12.
- the discharge pipe of the electric oil pump 12 is provided with a hydraulic pressure sensor 25 for detecting the discharge pressure, and the hydraulic pressure sensor 25 outputs an electric signal corresponding to the detected discharge pressure to the engine ECU 8.
- the pump driver 14 for supplying the electric power of the low voltage battery 15 to the electric motor 13 includes a current sensor 22 for detecting the current flowing to the electric motor 13, and the current sensor 22 corresponds to the detected current magnitude. Output electric signal to the engine ECU 8.
- the engine ECU 8 and the transmission ECU 21 are connected so as to be able to mutually communicate information necessary for executing control in each of the ECUs. For example, information required when controlling the transmission 6 (for example, the driving state of the vehicle and forward gear prohibition / forward gear prohibition cancellation described later) is transmitted from the engine ECU 8 to the transmission ECU 21, and the engine 2 is Information required for control (for example, the gear position of the transmission 6) is transmitted from the transmission ECU 21 to the engine ECU 8.
- FIG. 2 is a flow chart showing an embodiment of the engine control process.
- FIG. 3 is a flowchart showing one embodiment of the engine forced start process. These processes are executed by the computer of the engine ECU 8, and a program for causing the computer to execute this process is stored in a suitable storage medium such as a ROM or a RAM.
- FIG. 4 is a time chart of automatic engine stop and forced engine start.
- Step S1 determines whether an engine stop condition is satisfied.
- the engine stop condition is, for example, a condition that the brake switch is "ON", the depression amount of the accelerator pedal is "0", the vehicle speed is equal to or less than the engine stop permission vehicle speed (for example, 15 km / h).
- the engine stop condition is satisfied. If it is determined that the above-described engine stop condition is not satisfied (NO in step S1), the process ends.
- the operation of the fuel injection / ignition control device 7 is controlled to automatically stop the engine 2 (step S2). Then, the electric oil pump 12 is started (step S3).
- the functions of the “automatic stop unit” are realized by the processes of steps S1 and S2.
- a hydraulic control circuit 20 is used to control the hydraulic pressure (electric oil pump command pressure) to compensate for the decrease in the line pressure (or the decrease in the forward clutch pressure) so as not to cause such hydraulic pressure shortage with the automatic stop of the engine 2.
- Control is performed to operate the electric oil pump 12 so as to supply the pressure (time t1). At this time, if the electric oil pump 12 does not break down, the hydraulic pressure is supplied from the electric oil pump 12 according to the electric oil pump command pressure, so the line pressure (or forward clutch pressure) does not decrease. If there is a failure, the hydraulic pressure is not supplied from the electric oil pump 12 to the hydraulic control circuit 20, so the line pressure (or forward clutch pressure) continues to decrease until it reaches the minimum hydraulic pressure (for example, 0) as shown. (See times t1 to t2).
- step S4 failure detection of the electric oil pump 12 is performed.
- the failure of the electric oil pump 12 is a case where the hydraulic pressure (an electric oil pump instruction pressure) necessary to maintain the clutch in a engaged state can not be supplied to the hydraulic control circuit 20.
- the mechanical of the electric oil pump 12 and the electric motor 13 The failure detection includes not only failure of the electric motor 13, current failure of the electric motor 13, poor condition of the low voltage battery 15 for supplying electric power to the electric motor 13, or communication failure between the pump driver 14 and the engine ECU 8, etc. All the processes for detecting these faults are included.
- the mechanical failure of the electric oil pump 12 and the electric motor 13 can be detected based on, for example, the discharge pressure of the electric oil pump 12 detected by the oil pressure sensor 25. Further, the current abnormality of the electric motor 13 can be detected based on the current value detected by the current sensor 22. Such a current abnormality may occur due to a short circuit of a drive circuit in the electric motor 13, a sticking of contacts, disconnection, or the like. Furthermore, the state failure of the low voltage battery 15 can be detected based on the remaining capacity detected by the remaining capacity meter 24.
- step S5 it is determined whether the electric oil pump 12 is broken based on the detection result of the electric oil pump. In this case, any one of mechanical failure of the electric oil pump 12 and the electric motor 13, abnormal current of the electric motor 13, failure of the low voltage battery 15, and communication failure between the pump driver 14 and the engine ECU 8 is also applicable. In this case, it may be determined that the electric oil pump 12 is broken. If it is determined that the electric oil pump 12 has not failed (NO in step S5), the process ends. In this case, since the electric oil pump 12 operates normally without failure, the discharge pressure of the electric oil pump 12 gradually increases according to the electric oil pump instruction pressure until the predetermined oil pressure is reached. As a result, when the electric oil pump 12 does not break down, the forward clutch is maintained in the engaged state while the first gear (gear) is in-geared.
- the functions of the "failure determination unit" are realized by the processes of steps S4 and S5.
- the restart condition of the engine 2 for example, the brake switch is "OFF", the depression amount of the accelerator pedal is a predetermined value or more, etc.
- the stop of the engine 2 is continued until it is established. That is, unless the motor-driven oil pump 12 is broken, the engine 2 will not be started unless there is a driver's will and operation for moving the vehicle once stopped.
- a forced start of the engine 2 cranking of the engine 2 by the motor generator 3, start of fuel injection, etc.
- Stop 12 That is, since the mechanical oil pump 11 is driven by restarting the engine 2, the electric oil pump 12 is stopped.
- step S5 when it is determined in step S5 that the electric oil pump 12 is broken (YES in step S5), an engine forced start request is issued (for example, a predetermined flag is set to 1).
- the engine forced start process is executed (steps S6 and S7). If the electric oil pump 12 is broken, the engine 2 is immediately cranked by the motor generator 3 immediately after the automatic stop processing of the engine to forcibly start the engine 2. That is, without waiting for the above-described engine restart condition to be satisfied, in other words, after the engine 2 is substantially stopped regardless of the driver's intention to move the stopped vehicle again and the presence or absence of the operation for that. Restart engine 2 immediately.
- the in-gear state of the first gear (gear stage) and the engaged state of the clutch are automatically released to put the transmission 6 in the neutral state.
- the in-gear and clutch are automatically engaged again from the neutral state to the first gear (gear).
- step S11 determines whether a forced engine start request (see step S6 above) has been made.
- the forward gear is prohibited, that is, the transmission 6 is in the neutral state (step S12). If it is determined that the forward gear prohibited state (neutral state) is not established (NO in step S12), a predetermined hydraulic integrated torque value is determined according to the hydraulic pressure interpolation map (step S13). Step S14 prohibits the forward gear.
- Step S15 controls the operation of the fuel injection / ignition control device 7 to force the engine 2 to start. That is, at time t2 in FIG.
- the in-geared first gear (shift gear) is out-geared (released) and the clutch is completely released regardless of the engagement state of the forward clutch to put the transmission 6 in the neutral state ( The engine 2 is forcibly restarted after such a forward gear is prohibited.
- the functions of the “forced start unit” are realized by the processes of steps S11 to S15.
- FIG. 5 is a characteristic diagram of a hydraulic pressure interpolation map showing the relationship between the hydraulic fluid temperature and the hydraulic pressure integrated rotation value.
- the hydraulic pressure interpolation map indicates that the hydraulic pressure integrated rotational value is increased as the oil temperature of the hydraulic fluid (ATF) is higher. This is because the higher the oil temperature, the higher the fluidity of the hydraulic fluid, and the greater the degree of hydraulic fluid leakage or hydraulic pressure leakage in each valve body included in the hydraulic pressure control circuit 20.
- ATF oil temperature of the hydraulic fluid
- interpolation is performed to increase the hydraulic pressure integrated rotation value corresponding to the hydraulic pressure in advance.
- the hydraulic pressure necessary for operating the transmission 6 (more specifically, engaging the forward clutch) and the rotational speed of the engine 2 (or main shaft) detected by the engine rotational speed sensor 18 are temporally It calculates based on the integrated value (engine (or main shaft) rotation speed integrated value) integrated to. That is, the amount of oil supplied by the mechanical oil pump 11 mechanically driven by the driving force of the engine 2 is integrated over time, and the hydraulic pressure is predicted based on the integrated amount. Therefore, in order to compare and determine whether the hydraulic pressure is insufficient (see step S17), the hydraulic integrated rotation value (more specifically, the forward clutch) is used as an index for comparison with the engine (or main shaft) rotational speed integrated value.
- the specific engine (or main shaft) rotational speed integrated value corresponding to the minimum hydraulic pressure necessary to keep the vehicle in the engaged state is determined in consideration of the oil temperature as described above. This is advantageous because the oil pressure can be measured using the inexpensive rotation sensor (engine (or main shaft) rotation speed sensor 18) which has already been arranged without newly arranging an expensive oil pressure sensor.
- step S15 the process returns to the process of step S11.
- step S14 since the forward gear is inhibited in step S14, the forward gear is inhibited in step S12. It is determined that there is (YES in step S12). Therefore, integration of the engine (or main shaft) rotational speed is performed (step S16).
- Step S17 determines whether the engine (or main shaft) revolution integrated value is larger than the hydraulic integrated revolution value. If it is determined that the engine (or main shaft) rotational speed integrated value is not larger than the hydraulic pressure integrated rotation value (NO in step S17), the process returns to step S11 and repeats the above steps S11 to S17. Do. However, in this case, since the cancellation of the engine forced start request or the cancellation of the forward gear prohibition is not performed, the integration of the engine (or main shaft) rotational speed in step S16 is repeatedly performed.
- the engine is forcibly started at time t2 and the engine speed (or main shaft speed) rises accordingly, so engine (or main shaft) speed integration is performed after time t2.
- the value gradually increases until it exceeds the hydraulic pressure integrated rotation value.
- the line pressure also gradually increases, but the forward clutch pressure remains in the released state after time t2 when the clutch is released, and therefore the low pressure state does not change even if the line pressure gradually rises ( Time t2 to t3).
- step S18 when it is determined that the engine (or main shaft) revolution integrated value is larger than the hydraulic integrated revolution value (YES in step S17), the forward gear prohibition is canceled (step S18). That is, if it can be determined at time t3 in FIG. 4 that the engine (or main shaft) rotational speed integrated value exceeds the hydraulic integrated rotation value and it is determined that the hydraulic pressure shortage has been eliminated, the gear in the neutral state is ) And inset the forward clutch. Therefore, in FIG. 4, the forward clutch pressure rises to a constant pressure after time t3 at which the clutch is engaged. The function of the "re-engagement portion" is realized by the process of step S18.
- the step S19 cancels the engine forced start request to complete the engine forced start (processing) (returns the predetermined flag set to 1 in the step S6 to 0). Thereafter, the process returns to the process of step S11. In this case, since the engine forced start request has been canceled, it is determined that the engine forced start request is not made in step S11 (NO in step S11), and the engine (or main shaft) rotational speed integrated value is cleared. (Step S20) The process ends.
- the control device (engine ECU) of the vehicle automatically releases the in-gear (engagement) state of the first gear (gear) when the electric oil pump 12 is broken.
- the transmission 6 is brought into the neutral state by releasing the clutch and then the engine 2 is forcibly started, and a sufficient oil pressure is secured by the operation of the mechanical oil pump 11 accompanying the restart of the engine 2 In the gear), the in-gear (re-engagement) and the clutch are automatically engaged.
- control device for a vehicle according to the present invention is applied to a hybrid vehicle using an engine and a motor as a driving force generation means, but the invention is not limited thereto. You may apply to the vehicle used as a generation means.
- the engine 2 is cranked by using the motor generator 3 that generates driving force at the time of forced engine start after engine automatic stop, but the invention is not limited to this.
- cranking may be performed by using a motor of
- the hydraulic pressure sensor may be provided to detect the hydraulic pressure necessary for operating the transmission 6 regardless of the integrated value obtained by temporally integrating the number of revolutions of the engine rotational speed sensor 18 Needless to say.
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Abstract
Description
Claims (6)
- 車両のための制御装置であって、前記車両は、燃料の燃焼によって作動するエンジンと、電気エネルギーで作動する電動モータとを車両走行用の動力源として有し、さらに該エンジン及び電動モータの少なくとも一方と駆動輪との間の動力伝達機構に配設された変速機と、該変速機に作動油を供給する前記エンジンによって駆動される機械式オイルポンプと、該変速機に作動油を供給する電気モータによって駆動される電動式オイルポンプとを有し、前記制御装置は、
所定の条件下で前記エンジンを自動停止する自動停止部と、
前記電動式オイルポンプが故障か否かを判定する故障判定部と、
前記故障判定部により前記電動式オイルポンプが故障と判定された場合に、前記エンジンの自動停止時に係合されていた変速段の解除及びクラッチの解放を行い、前記変速機をニュートラル状態としてから前記自動停止したエンジンを強制的に再始動する強制始動部と、
前記エンジンの再始動に伴い駆動された前記機械式オイルポンプにより前記変速機に供給される作動油の油圧が所定値以上となってから、前記解除した変速段の再係合及びクラッチの締結を行う再係合部と
を備えることを特徴とする、車両のための制御装置。 - 前記再係合部は、前記機械式オイルポンプにより前記変速機に供給される作動油の温度に応じて前記所定値を決定することを特徴とする請求項1に記載の車両のための制御装置。
- 前記エンジンの回転数又は前記エンジンの回転を伝達するメインシャフトの回転数を検出する回転数センサをさらに具備し、
前記再係合部は、前記回転数センサの出力に応じて前記エンジンの回転数又は前記メインシャフトの回転数を時間積算した回転積算値を、前記機械式オイルポンプにより前記変速機に供給される作動油の油圧と看做して用いることを特徴とする請求項1に記載の車両のための制御装置。 - 前記エンジンの回転数又は前記エンジンの回転を伝達するメインシャフトの回転数を検出する回転数センサをさらに具備し、
前記再係合部は、前記回転数センサの出力に応じて前記エンジンの回転数又は前記メインシャフトの回転数を時間積算した回転積算値を、前記機械式オイルポンプにより前記変速機に供給される作動油の油圧と看做して用いることを特徴とする請求項2に記載の車両のための制御装置。 - 車両の制御のためにコンピュータにより実行される方法であって、前記車両は、燃料の燃焼によって作動するエンジンと、電気エネルギーで作動する電動モータとを車両走行用の動力源として有し、さらに該エンジン及び電動モータの少なくとも一方と駆動輪との間の動力伝達機構に配設された変速機と、該変速機に作動油を供給する前記エンジンによって駆動される機械式オイルポンプと、該変速機に作動油を供給する電気モータによって駆動される電動式オイルポンプとを有し、前記方法は、
所定の条件下で前記エンジンを自動停止するステップと、
前記電動式オイルポンプが故障か否かを判定するステップと、
前記電動式オイルポンプが故障と判定された場合に、前記エンジンの自動停止時に係合されていた変速段の解除及びクラッチの解放を行い、前記変速機をニュートラル状態としてから前記自動停止したエンジンを強制的に再始動するステップと、
前記エンジンの再始動に伴い駆動された前記機械式オイルポンプにより前記変速機に供給される作動油の油圧が所定値以上となってから、前記解除した変速段の再係合及びクラッチの締結を行うステップと
を備える。 - コンピュータ読み取り可能な媒体であって、車両を制御するための方法をコンピュータに実行させるためのプログラムを記憶してなり、前記車両は、燃料の燃焼によって作動するエンジンと、電気エネルギーで作動する電動モータとを車両走行用の動力源として有し、さらに該エンジン及び電動モータの少なくとも一方と駆動輪との間の動力伝達機構に配設された変速機と、該変速機に作動油を供給する前記エンジンによって駆動される機械式オイルポンプと、該変速機に作動油を供給する電気モータによって駆動される電動式オイルポンプとを有し、前記方法は、
所定の条件下で前記エンジンを自動停止するステップと、
前記電動式オイルポンプが故障か否かを判定するステップと、
前記電動式オイルポンプが故障と判定された場合に、前記エンジンの自動停止時に係合されていた変速段の解除及びクラッチの解放を行い、前記変速機をニュートラル状態としてから前記自動停止したエンジンを強制的に再始動するステップと、
前記エンジンの再始動に伴い駆動された前記機械式オイルポンプにより前記変速機に供給される作動油の油圧が所定値以上となってから、前記解除した変速段の再係合及びクラッチの締結を行うステップと
を備える。
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JP2020125843A (ja) * | 2019-02-06 | 2020-08-20 | アイシン・エィ・ダブリュ株式会社 | 車両用駆動装置の油圧制御装置及びハイブリッド車両 |
JP7131419B2 (ja) | 2019-02-06 | 2022-09-06 | 株式会社アイシン | 車両用駆動装置の油圧制御装置及びハイブリッド車両 |
CN113401108A (zh) * | 2020-03-16 | 2021-09-17 | 丰田自动车株式会社 | 混合动力车辆的驱动装置 |
CN111810629A (zh) * | 2020-07-22 | 2020-10-23 | 钦州绿传科技有限公司 | 一种车辆中机械泵失效的检测及控制方法及车辆 |
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JP5286425B2 (ja) | 2013-09-11 |
CN102712314B (zh) | 2015-07-22 |
EP2527220A1 (en) | 2012-11-28 |
CN102712314A (zh) | 2012-10-03 |
EP2527220A4 (en) | 2013-08-28 |
EP2527220B1 (en) | 2014-11-26 |
JPWO2011089818A1 (ja) | 2013-05-23 |
US20120296509A1 (en) | 2012-11-22 |
US9050966B2 (en) | 2015-06-09 |
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