WO2018079060A1 - 車両の制御装置 - Google Patents
車両の制御装置 Download PDFInfo
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- WO2018079060A1 WO2018079060A1 PCT/JP2017/031141 JP2017031141W WO2018079060A1 WO 2018079060 A1 WO2018079060 A1 WO 2018079060A1 JP 2017031141 W JP2017031141 W JP 2017031141W WO 2018079060 A1 WO2018079060 A1 WO 2018079060A1
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- WIPO (PCT)
- Prior art keywords
- shift position
- torque
- torque reserve
- engine
- switching operation
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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
- F02D41/0225—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the gear ratio or shift lever 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
- F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
- F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
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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
- F02D41/0002—Controlling intake air
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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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- 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
- F02D41/023—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the gear ratio shifting
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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
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/045—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions combined with electronic control of other engine functions, e.g. fuel injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/15—Digital data processing
- F02P5/1502—Digital data processing using one central computing unit
- F02P5/1504—Digital data processing using one central computing unit with particular means during a transient phase, e.g. acceleration, deceleration, gear change
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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
- 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
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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
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/023—Temperature of lubricating oil or working fluid
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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
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
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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
- F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
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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
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
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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
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
- F02D2250/22—Control of the engine output torque by keeping a torque reserve, i.e. with temporarily reduced drive train or engine efficiency
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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
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to a vehicle control device.
- Vehicles such as automobiles are equipped with a transmission that converts rotation based on the driving force of the engine at a desired gear ratio and outputs it to the drive shaft.
- the transmission is connected to the output shaft of the engine via a torque converter that is a fluid coupling.
- Such a transmission is provided with a forward / reverse switching clutch for switching a forward drive or a reverse drive of the vehicle by switching the rotation direction of the drive shaft.
- a forward / reverse switching clutch includes a forward clutch and a reverse brake. When the shift position selected by the driver is in the drive range, the reverse brake is released, the forward clutch is engaged, the drive shaft rotates in the forward direction, and the vehicle can travel forward.
- the forward clutch When the shift position is in the reverse range, the forward clutch is released, the reverse brake is engaged, the drive shaft rotates in the reverse direction, and the vehicle can travel backward. Further, when the shift position is in the parking range or the neutral range, both the forward clutch and the reverse brake are released, and torque transmission by the forward / reverse switching clutch is interrupted.
- the state where the forward clutch or the reverse brake is engaged and torque can be transmitted to the drive shaft is also referred to as “in-gear state”, and the state where the forward clutch and the reverse brake are both released and the torque transmission is interrupted. Also called “out-gear condition”.
- the forward clutch and reverse brake of such a transmission are switched over and off by a transmission control device.
- the transmission control device detects a shift position selected by the driver and controls the forward / reverse switching clutch according to the shift position.
- the shift position is switched from the neutral range to the drive range when the vehicle travels forward.
- the transmission control device engages the forward clutch from a state in which the forward clutch and the reverse brake are released according to the detected shift position.
- the transmission control device engages the reverse brake from the state in which the forward clutch and the reverse brake are released according to the detected shift position.
- the present invention has been made in view of the above problems, and an object of the present invention is to perform a switching operation between the first shift position and the second shift position, both in the in-gear state. It is an object of the present invention to provide a new and improved vehicle control apparatus capable of securing engine output torque even in the case of a failure.
- a vehicle control apparatus capable of mutual switching operation between a first shift position and a second shift position in which both power transmission systems are in an in-gear state.
- the output torque of the engine is increased when a shift position detecting unit for detecting the selected shift position and a shift switching operation between the first shift position and the second shift position are performed.
- a vehicle control device including a torque reserve control unit that executes torque reserve control.
- the engine output Torque can be secured even if the switching operation between the first shift position and the second shift position in which the forward clutch or the reverse brake is engaged is performed.
- FIG. 1 is a schematic diagram showing a power transmission system of a vehicle controlled by a vehicle control device according to an embodiment of the present invention. It is explanatory drawing which shows the structural example of the control apparatus of the vehicle which concerns on the embodiment. It is explanatory drawing which shows the relationship between oil temperature and torque reserve control time. It is a flowchart which shows the setting process of torque reserve control time. It is a flowchart which shows the setting process of a reserve torque. It is a flowchart which shows a torque reserve control process. It is a flowchart which shows the torque reserve control process at the time of an out-in switching operation. It is a flowchart which shows the torque reserve control process at the time of an in-in switching operation.
- 6 is a time chart when torque reserve control is not executed during an out-in switching operation. 6 is a time chart when torque reserve control is executed during an out-in switching operation. 6 is a time chart when torque reserve control is not executed during an in-in switching operation. 6 is a time chart when torque reserve control is executed during an in-in switching operation.
- FIG. 1 is a schematic diagram showing a power transmission system of a vehicle. Output torque from the engine 10 is transmitted to a drive shaft (not shown) via the transmission 20.
- the engine 10 is, for example, a gasoline engine.
- the engine 10 is provided with a first rotation sensor 11 that detects the rotational speed of the crankshaft. A sensor signal from the first rotation sensor 11 is output to an engine control unit (ECU) 50.
- ECU engine control unit
- the intake throttle valve, ignition plug, fuel injection valve, and the like of the engine 10 are driven and controlled by the engine control device 50, and the intake air amount, ignition timing, and fuel injection amount are controlled.
- the transmission 20 includes a torque converter 21, a forward / reverse switching clutch 23, and a transmission mechanism 25.
- the torque converter 21 is a fluid coupling that transmits output torque from the engine 10 to the downstream side via hydraulic oil.
- the forward / reverse switching clutch 23 has, for example, a forward clutch and a reverse brake (not shown), and connection / disconnection of the forward clutch or the reverse brake is switched by hydraulic control.
- a transmission control unit (TCU) 70 detects the shift position selected by the driver and controls connection / disconnection of the forward / reverse switching clutch 23.
- a vehicle to which the vehicle control device according to the present embodiment can be applied includes a button-type shift switching device.
- Such a shift switching device can freely switch a parking range (P), a reverse range (R), a neutral range (N), and a drive range (D) by operating a button.
- the transmission 20 is provided with a second rotation sensor 27 that detects the rotational speed of the turbine shaft that transmits rotation from the torque converter 21 to the forward / reverse switching clutch 23.
- the sensor signal of the second rotation sensor 27 is output to the transmission control device 70.
- the transmission mechanism 25 converts the torque transmitted through the torque converter 21 and the forward / reverse switching clutch 23 into a desired gear ratio and transmits it to the downstream side.
- the transmission mechanism 25 may be of a stepped type or a stepless type.
- the gear ratio is adjusted by adjusting the groove widths of a primary pulley and a secondary pulley around which a drive chain (not shown) is wound by hydraulic control.
- the hydraulic pressure supplied to each operating part of the transmission 20 is adjusted by controlling a flow rate control valve (not shown) by a transmission control unit (TCU) 70.
- TCU transmission control unit
- the forward / reverse switching clutch 23 is engaged with the forward clutch engaged state via the neutral state in which both the forward clutch and the reverse brake are released.
- the engaged state of the reverse brake is switched. Therefore, even if the drive range and the reverse range are directly switched to each other, if the output of the engine 10 does not change when the forward clutch or the reverse brake is engaged from the neutral state, the rotational speed of the engine 10 is Will be reduced. Therefore, the vehicle control apparatus according to the present embodiment suppresses a decrease in the rotational speed of the engine 10 by increasing the output of the engine 10 by executing torque reserve control at the time of shift position switching.
- FIG. 2 is a block diagram showing a functional configuration of a part related to the torque reserve control in the vehicle control system.
- the control system includes an engine control device 50 and a transmission control device 70.
- the engine control device 50 and the transmission control device 70 can communicate with each other via a communication bus wiring such as a CAN (Controller Area Network).
- the engine control device 50 corresponds to a vehicle control device according to the present invention.
- the transmission control device 70 includes a control unit 71 composed of a microcomputer such as a CPU (Central Processing Unit).
- the controller 71 includes a shift position detector 73, a clutch controller 75, and an oil temperature detector 77. Each of these units may be a function realized by executing a software program by a microcomputer.
- the transmission control device 70 includes a storage element (not shown) such as a RAM (Random Access Memory) and a ROM (Read Only Memory).
- a shift position signal Ssp output from the shift switching device 40 and an oil temperature signal Sto output from the oil temperature sensor 33 are input to the transmission control device 70.
- the oil temperature sensor 33 is provided at an appropriate position of a hydraulic circuit that supplies hydraulic oil to the transmission 20.
- the shift position detector 73 detects the shift position selected in the shift switching device 40 based on the input shift position signal Ssp.
- the oil temperature detection unit 77 detects the temperature (oil temperature) To of the hydraulic oil supplied to the transmission 20 based on the input oil temperature signal Sto.
- the clutch control unit 75 outputs a drive instruction signal to the flow control valve drive unit 79 that drives the flow control valve provided in the valve unit 31 of the transmission 20 based on the detected shift position.
- an electromagnetic control valve is used as the flow control valve.
- the clutch control unit 75 controls the engagement or release of the forward clutch and the reverse brake by controlling the hydraulic pressure of the hydraulic oil supplied to the forward clutch and the reverse brake of the forward / reverse switching clutch 23.
- the clutch control unit 75 releases the reverse brake and engages the forward clutch. Further, when the reverse range is selected, the clutch control unit 75 releases the forward clutch and engages the reverse brake. Further, the clutch control unit 75 releases both the forward clutch and the reverse brake when the parking range or the neutral range is selected.
- the engine control device 50 includes a control unit 51 configured by a microcomputer such as a CPU.
- the control unit 51 includes a shift position information acquisition unit 53 and a torque reserve control unit 55. Each of these units may be a function realized by executing a software program by a microcomputer.
- the engine control device 50 includes a storage element (not shown) such as a RAM or a ROM.
- the shift position information acquisition unit 53 acquires shift position information from the transmission control device 70 via the communication bus wiring 80.
- the shift position information acquisition unit 53 may directly acquire the shift position signal Ssp from the shift switching device 40.
- the shift position information acquisition unit 53 corresponds to a shift position detection unit in the engine control device 50 according to the present embodiment.
- the torque reserve control unit 55 executes torque reserve control for increasing the engine output torque when the switching operation to the drive range or the reverse range is performed.
- the torque reserve control unit 55 performs torque reserve when a switching operation (out-in switching operation) from a parking range or neutral range, which is a shift position in an out-gear state, to a reverse range or drive range, which is a shift position in an in-gear state, is performed. Execute control.
- both the torque reserve control unit 55 executes torque reserve control even when a switching operation (in-in switching operation) is performed between the drive range and the reverse range which are shift positions in the in-gear state. Therefore, even when the selection of the parking range or the neutral range is not detected, the engine control device 50 can suppress a decrease in the rotational speed of the engine 10 when the power transmission system is switched from the out gear state to the in gear state.
- the torque reserve control unit 55 of the engine control device 50 outputs a drive instruction signal to the throttle valve drive unit 61 that drives the intake throttle valve 13 to increase the intake amount introduced into the cylinder of the engine 10. To increase the engine output torque. However, since the forward clutch or the reverse brake is engaged after the timing when the shift position switching operation is detected, if the intake air amount is simply increased when the shift position switching operation is detected, the engine output torque increases. The torque shock when the forward clutch or the reverse brake is engaged can be too large. Therefore, the torque reserve control unit 55 outputs a drive instruction signal to the spark plug drive unit 63 that drives the spark plug 15 together with the increase of the intake air amount, and shifts the ignition timing to the retard side.
- the control of the engine output torque by adjusting the ignition timing is more responsive than the control of the engine output torque by adjusting the intake air amount, so the torque reserve control unit 55 ensures the increase range of the engine output torque by increasing the intake air amount.
- the ignition timing an appropriate engine output torque is secured.
- the engine output torque can be increased while maintaining the rotational speed of the engine 10 substantially constant until the forward / reverse switching clutch 23 changes from the neutral state to the in-gear state.
- a decrease in the rotational speed of the engine 10 due to an increase in torque generated on the downstream side of the torque converter 21 is suppressed while torque shock is reduced.
- the torque reserve control unit 55 includes a first switching state in which a switching operation from the parking range or neutral range to the drive range is performed, a second switching state in which a switching operation from the parking range or the neutral range to the reverse range is performed, and a reverse range.
- the torque reserve control may be executed under different conditions in the third switching state in which the switching operation from the drive range to the drive range is performed and in the fourth switching state in which the switching operation from the drive range to the reverse range is performed.
- the third switching state and the fourth switching state are states in which a mutual switching operation is performed between the first shift position and the second shift position in which the power transmission system is in the in-gear state.
- the forward clutch or the reverse brake is engaged from the neutral state of the forward / reverse switching clutch 23.
- the torque reserve control time in the third switching state and the fourth switching state may be set longer than the torque reserve control time in the first switching state and the second switching state.
- the torque reserve control unit 55 can execute the torque reserve control by selecting a preset torque reserve control time for each of the first switching state to the fourth switching state.
- the clutch control unit of the transmission control device 70 may vary the torque reserve control time in each of the first to fourth switching states according to the length or capacity of the oil passage.
- the torque reserve control time may be set longer in proportion to the time from when the clutch control unit 75 starts supplying hydraulic pressure to the forward clutch or reverse brake until the forward clutch or reverse brake is engaged.
- the torque reserve control time in each switching state can be set, for example, based on the engagement time data of each of the forward clutch and the reverse brake measured in advance using an actual machine.
- the torque reserve control unit 55 may set the torque reserve control time based on the oil temperature To of the hydraulic oil supplied to the transmission 20. That is, the torque reserve control unit 55 may adjust the torque reserve control time in each switching state based on the oil temperature To. Since the viscosity of the hydraulic oil differs depending on the oil temperature To and the rate of increase of the hydraulic pressure supplied to the forward clutch or the reverse brake is different, the actual operation after the drive instruction signal is output from the clutch control unit 75 to the flow control valve drive unit 79. The time until the forward clutch or the reverse brake starts to be engaged may differ. Therefore, by appropriately adjusting the torque reserve control time based on the oil temperature To, the possibility that the engine output torque will decrease when the forward clutch or the reverse brake is engaged can be reduced.
- FIG. 3 shows the relationship between the oil temperature To and the torque reserve control time.
- the torque reserve control unit 55 can acquire information on the oil temperature To from the transmission control device 70 via the communication bus wiring 80. Alternatively, the torque reserve control unit 55 may directly acquire the oil temperature signal Sto from the oil temperature sensor 33.
- the torque reserve control unit 55 may set an engine output torque (hereinafter also referred to as “reserve torque”) to be increased when executing the torque reserve control based on the oil temperature To.
- reserve torque an engine output torque
- the torque reserve control unit 55 sets the reserve torque larger as the oil temperature To is lower, and the torque transmitted to the downstream side of the torque converter 21 is ensured when the power transmission system switches from the out gear state to the in gear state. You may do it.
- FIG. 4 shows a flowchart of the torque reserve control time setting process.
- the torque reserve control unit 55 detects the oil temperature To (step S11), and then sets the torque reserve control times T1, T2, T3, and T4 for the first to fourth switching states based on the oil temperature To. Then, it is stored in the storage element (step S13).
- the torque reserve control time setting process may be repeatedly executed, for example, every processing cycle of the microcomputer, or may be executed only when the oil temperature To changes by a predetermined threshold value or more. In any case, the torque reserve control times T1, T2, T3, and T4 in the first to fourth switching states are always set.
- FIG. 5 shows a flowchart of the reserve torque setting process.
- the torque reserve control unit 55 detects the oil temperature To (step S21), then sets a reserve torque based on the oil temperature To and stores it in the storage element (step S23).
- Such reserve torque setting processing may be repeatedly executed, for example, every processing cycle of the microcomputer, or may be executed only when the oil temperature To changes by a predetermined threshold value or more. In any case, the reserve torque value to be increased is always set.
- FIG. 6 is a flowchart showing a shift position switching operation determination process
- FIG. 7 is a flowchart showing a torque reserve control process during a shift position switching operation from the out-gear state to the in-gear state
- FIG. It is a flowchart which shows the torque reserve control process at the time of switching operation of the shift position to an in-gear state.
- the torque reserve control unit 55 determines whether or not a shift position switching operation has been performed based on the detected shift position information (step S31). When the shift position switching operation is not performed (S31: No), the torque reserve control unit 55 repeats the determination process of step S31. When the shift position switching operation is performed (S31: Yes), the torque reserve control unit 55 determines whether or not the shift position before the switching operation is the parking range or the neutral range (step S33). When the shift position before the switching operation is the parking range or the neutral range (S33: Yes), the torque reserve control unit 55 proceeds to step S41 of the flowchart shown in FIG. On the other hand, when the shift position before the switching operation is neither the parking range nor the neutral range (S33: No), the torque reserve control unit 55 proceeds to step S61 of the flowchart shown in FIG.
- the torque reserve control unit 55 determines whether or not the current shift position after the switching operation is the drive range (step S41). ).
- the current shift position is the drive range (S41: Yes)
- the torque reserve control unit 55 selects the torque reserve control time T1 and sets a timer value (step S43).
- the torque reserve control unit 55 determines whether or not the current shift position is in the reverse range (step S51).
- the current shift position is in the reverse range (S51: Yes)
- the torque reserve control unit 55 selects a torque reserve control time T2 and sets a timer value (step S53).
- step S43 When the timer value is set in step S43 or step S53, the torque reserve control unit 55 outputs a drive instruction signal to the throttle valve drive unit 61 and the spark plug drive unit 63 to start torque reserve control and timer count. (Countdown) is started (step S45). Next, the torque reserve control unit 55 determines whether or not the timer value T has become 0 (step S47). The determination process of step S47 is repeated until the timer value T becomes 0 (S47: No), and when the timer value T becomes 0 (S47: Yes), the torque reserve control unit 55 cancels the torque reserve control ( Step S49). Thereafter, the torque reserve control unit 55 returns to step S31 and repeats the torque reserve control process.
- step S51 If the current shift position is not in the reverse range in step S51 described above (S51: No), it is not necessary to execute torque reserve control because the forward clutch and the reverse brake of the forward / reverse switching clutch 23 are not engaged. Therefore, the torque reserve control unit 55 ends this routine as it is, returns to step S31, and repeats the torque reserve control process.
- step S33 determines whether the shift position before the switching operation is the reverse range. Is determined (step S61).
- the torque reserve control unit 55 determines whether or not the current shift position is the drive range (step S63).
- the switching operation from the reverse range in the in-gear state to the drive range in the same in-gear state is performed (third switching state), and torque reserve control is performed.
- the unit 55 selects the torque reserve control time T3 and sets a timer value (step S65).
- step S73 determines whether the shift position before the switching operation is in the drive range. ).
- step S73: Yes determines whether or not the current shift position is the reverse range (step S75).
- step S75: Yes the switching operation from the reverse range in the in-gear state to the drive range in the in-gear state is performed (fourth switching state), and torque reserve control is performed.
- the unit 55 selects the torque reserve control time T4 and sets a timer value (step S77).
- step S65 or step S77 the torque reserve control unit 55 outputs a drive instruction signal to the throttle valve drive unit 61 and the spark plug drive unit 63 to start torque reserve control and count the timer. (Countdown) is started (step S67).
- step S69 the torque reserve control unit 55 determines whether or not the timer value T has become 0 (step S69). The determination process of step S69 is repeated until the timer value T becomes 0 (S69: No), and when the timer value T becomes 0 (S69: Yes), the torque reserve control unit 55 cancels the torque reserve control ( Step S71). Thereafter, the torque reserve control unit 55 returns to step S31 and repeats the torque reserve control process.
- step S63 If the current shift position is not in the drive range in the above step S63 (S63: No), it is not necessary to execute torque reserve control because the forward clutch and the reverse brake of the forward / reverse switching clutch 23 are not engaged. Similarly, if the current shift position is not in the reverse range in step S75 described above (S75: No), it is not necessary to execute torque reserve control because the forward clutch and the reverse brake of the forward / reverse switching clutch 23 are not engaged. Further, if the shift position before the switching operation is not in the drive range in step S73 (S73: No), the torque reserve control is not executed because the shift position before the switching operation is not specified. Therefore, the torque reserve control unit 55 ends this routine as it is, returns to step S31, and repeats the torque reserve control process.
- Torque reserve control is executed even when the switching operation to the shift position is performed. Therefore, when the switching operation to the drive range or the reverse range is performed, the forward clutch or the reverse brake is engaged, and thus the rotational speed of the engine 10 decreases due to an increase in torque generated on the downstream side of the torque converter 21. Can be suppressed.
- First switching state and second switching state 9 and 10 show the operating state of the power transmission system when the switching operation from the shift position in the out-gear state to the shift position in the in-gear state is performed.
- FIG. 9 shows an operation state when the torque reserve control is not executed
- FIG. 10 shows an operation state when the torque reserve control is executed.
- the shift position information acquisition unit 53 of the engine control device 50 acquires information indicating that the shift position is in the out-of-gear parking range or neutral range.
- the forward / reverse switching clutch 23 is in an out-gear state in which both the forward clutch and the reverse brake are released, and the engine rotational speed Ne coincides with the turbine rotational speed Nt on the downstream side of the torque converter 21.
- the transmission control device 70 controls the valve unit 31 so as to supply hydraulic pressure to the forward clutch or the reverse brake as the shift position is switched.
- the hydraulic pressure starts to be supplied from the time Ti1 to the forward clutch or the reverse brake, there is a time difference from the time Ti2 when the forward clutch or the reverse brake actually starts to be engaged.
- the torque from the downstream side input to the turbine shaft of the torque converter 21 starts to increase due to the forward clutch or the reverse brake starting to be engaged at the time Ti2, and the turbine speed Nt begins to fall.
- the increase in torque generated on the downstream side of the torque converter 21 and the decrease in the turbine speed Nt continue until time Ti4 when the engagement of the forward clutch or the reverse brake is completed.
- the engine speed Ne decreases at time Ti3.
- the engine control device increases the opening of the intake throttle valve 13 and advances the ignition angle so that the engine speed Ne is maintained at the idle speed. As a result, the engine output torque is increased and the engine speed Ne is restored.
- the engine control device 50 starts executing the torque reserve control when detecting the shift position switching operation at time Ti1.
- the engine control device 50 generates the reserve torque of the engine 10 by using the increase in the opening of the intake throttle valve 13 and the retard of the ignition angle, and the time when the forward clutch or the reverse brake starts to be engaged.
- the engine output torque is increased during the period up to Ti2 (torque reserve control time). For this reason, even if the forward rotation clutch or reverse brake starts to be engaged at time Ti2, even if the turbine rotational speed Nt starts to decrease, the decrease in the engine rotational speed Ne is suppressed.
- the torque reserve control is canceled and the reserve torque of the engine 10 is gradually returned to zero.
- Third switching state and fourth switching state 11 and 12 show the operating state of the power transmission system when a switching operation from the in-gear shift position to the in-gear shift position is performed.
- FIG. 11 shows an operation state when torque reserve control is not executed
- FIG. 12 shows an operation state when torque reserve control is executed.
- the shift position information acquisition unit 53 of the engine control device 50 acquires information indicating that the shift position is in the in-gear drive range.
- the forward / reverse switching clutch 23 is in an in-gear state where the reverse brake is released while the forward clutch is engaged, and the turbine rotational speed Nt becomes lower than the engine rotational speed Ne due to the torque generated on the downstream side of the torque converter 21. ing.
- the shift position information acquisition unit 53 detects that the shift position has been switched to the in-gear reverse range.
- the transmission control device 70 controls the valve unit 31 so as to stop the supply of hydraulic pressure to the forward clutch and supply hydraulic pressure to the reverse brake as the shift position is switched.
- the connection / disconnection switching of the forward / reverse switching clutch 23 is started from the time Ti11, there is a time difference from the time Ti2 at which the reverse brake actually starts to be engaged.
- the forward / reverse switching clutch 23 once enters the out-gear state (neutral state) at time Ti12 and again enters the in-gear state at time Ti13.
- the torque from the downstream side input to the turbine shaft of the torque converter 21 once decreases and then increases again.
- the turbine rotational speed Nt once increases and then decreases again.
- the forward clutch is started to be released at time Ti12, whereby the torque from the downstream side input to the turbine shaft starts to decrease and the turbine rotational speed Nt starts to increase.
- the forward clutch is completely released, the torque from the downstream side that is input to the turbine shaft becomes zero, but when the reverse brake starts to be engaged at time Ti13, the torque from the downstream side that is input to the turbine shaft again The turbine rotation speed Nt starts to decrease after increasing.
- the increase in torque and the decrease in turbine speed Nt that occur downstream of the torque converter 21 continue until time Ti15 when the reverse brake is completely engaged.
- the engine speed Ne decreases at time Ti14.
- the engine control device 50 increases the opening of the intake throttle valve 13 and advances the ignition angle so that the engine speed Ne is maintained at the idle speed. As a result, the engine output torque is increased and the engine speed Ne is restored.
- the engine control device 50 starts executing the torque reserve control when detecting the shift position switching operation at time Ti11.
- the engine control device 50 generates the reserve torque of the engine 10 by using the increase of the opening degree of the intake throttle valve 13 and the retard of the ignition angle in combination, the forward clutch is released, and the reverse brake is further performed.
- the engine output torque is increased during the period (torque reserve control time) until time Ti13 at which the engagement is started. For this reason, even if the turbine speed Nt starts to decrease due to the reverse brake being started at time Ti13, the decrease in the engine speed Ne is suppressed. At time Ti13 at which the reverse brake starts to be engaged, the torque reserve control is canceled and the reserve torque of the engine 10 is gradually returned to zero.
- the engine control apparatus 50 not only performs the switching operation from the out-gear shift position to the in-gear shift position but also shifts from the in-gear shift position to the in-gear state. Torque reserve control is also executed when a switching operation to a position is performed. Therefore, when the forward clutch or the reverse brake is engaged from the neutral state of the forward / reverse switching clutch 23, the rotation speed of the engine 10 is suppressed from increasing due to an increase in torque generated on the downstream side of the torque converter 21.
- the engine control device 50 causes the engine 10 to generate reserve torque by retarding the ignition timing together with the increase of the intake air amount. Since the adjustment of the ignition timing by the spark plug 15 is more responsive to the engine output torque than the adjustment of the opening of the intake throttle valve 13, the reserve torque can be adjusted with relatively high accuracy by the engine control device 50.
- the engine control apparatus 50 sets the torque reserve control time and the reserve torque when executing the torque reserve control based on the oil temperature To. For this reason, torque reserve control is executed in accordance with the increase rate of the hydraulic pressure due to the difference in the viscosity of the hydraulic oil and the difference in torque transmission efficiency in the torque converter 21.
Abstract
Description
まず図1を参照して本実施形態に係る車両の制御装置を適用可能な車両の動力伝達系の構成例を簡単に説明する。図1は車両の動力伝達系を示す模式図である。エンジン10からの出力トルクは変速機20を介して図示しない駆動軸へと伝達される。エンジン10は例えばガソリンエンジンである。エンジン10にはクランクシャフトの回転数を検出する第1の回転センサ11が設けられている。第1の回転センサ11のセンサ信号はエンジン制御装置(ECU)50に出力される。以下エンジン10としてガソリンエンジンを備えた例を説明する。エンジン10の吸気スロットル弁や点火プラグ、燃料噴射弁等はエンジン制御装置50により駆動制御され、吸気量や点火時期、燃料噴射量が制御される。
次に図2を参照して本実施形態に係る車両の制御装置が適用され得る制御系の構成例を説明する。図2は車両の制御系のうちトルクリザーブ制御に関連する部分の機能構成を示すブロック図である。制御系はエンジン制御装置50とトランスミッション制御装置70とを備える。エンジン制御装置50とトランスミッション制御装置70とはCAN(Controller Area Network)等の通信バス配線を介して相互に通信可能になっている。本実施形態においてエンジン制御装置50が本発明に係る車両の制御装置に相当する。
次に図4~図8を参照して本実施形態に係るエンジン制御装置50によるトルクリザーブ制御処理の具体例について説明する。
図4はトルクリザーブ制御時間の設定処理のフローチャートを示す。トルクリザーブ制御部55は油温Toを検出し(ステップS11)、次いで油温Toに基づいて第1の切換状態~第4の切換状態それぞれのトルクリザーブ制御時間T1,T2,T3,T4を設定して記憶素子に記憶する(ステップS13)。かかるトルクリザーブ制御時間の設定処理は、例えばマイクロコンピュータの処理サイクルごとに繰り返し実行されてもよく、あるいは油温Toが所定の閾値以上変化したときにのみ実行されてもよい。いずれにしても第1の切換状態~第4の切換状態それぞれのトルクリザーブ制御時間T1,T2,T3,T4は常時設定された状態となっている。
図5はリザーブトルクの設定処理のフローチャートを示す。トルクリザーブ制御部55は油温Toを検出し(ステップS21)、次いで油温Toに基づいてリザーブトルクを設定して記憶素子に記憶する(ステップS23)。かかるリザーブトルクの設定処理は、例えばマイクロコンピュータの処理サイクルごとに繰り返し実行されてもよく、あるいは油温Toが所定の閾値以上変化したときにのみ実行されてもよい。いずれにしても増大すべきリザーブトルクの値は常時設定された状態となっている。
図6~図8はトルクリザーブ制御処理のフローチャートを示す。図6はシフトポジションの切換操作の判定処理を示すフローチャートであり、図7はアウトギヤ状態からインギヤ状態へのシフトポジションの切換操作時のトルクリザーブ制御処理を示すフローチャートであり、図8はインギヤ状態からインギヤ状態へのシフトポジションの切換操作時のトルクリザーブ制御処理を示すフローチャートである。
次に図9~図12を参照して本実施形態に係るエンジン制御装置50によるトルクリザーブ制御が実行される場合及び実行されない場合それぞれにおける動力伝達系の動作状態を説明する。
図9及び図10はアウトギヤ状態のシフトポジションからインギヤ状態のシフトポジションへの切換操作が行われる場合の動力伝達系の動作状態を示している。図9がトルクリザーブ制御を実行しない場合の動作状態を示し、図10がトルクリザーブ制御を実行した場合の動作状態を示している。
図11及び図12はインギヤ状態のシフトポジションから同じくインギヤ状態のシフトポジションへの切換操作が行われる場合の動力伝達系の動作状態を示している。図11がトルクリザーブ制御を実行しない場合の動作状態を示し、図12がトルクリザーブ制御を実行した場合の動作状態を示している。
13 吸気スロットル弁
15 点火プラグ
20 変速機
21 トルクコンバータ
23 前後進切換クラッチ
25 変速機構
40 シフト切換装置
50 エンジン制御装置
53 シフト位置情報取得部
55 トルクリザーブ制御部
70 トランスミッション制御装置
73 シフト位置検出部
75 クラッチ制御部
Claims (7)
- 動力伝達系がともにインギヤ状態である第1のシフト位置と第2のシフト位置との相互切換操作が可能な車両の制御装置において、
選択されたシフト位置を検出するシフト位置検出部と、
前記第1のシフト位置と前記第2のシフト位置との間でのシフト切換操作が行われたときに、エンジンの出力トルクを増大させるトルクリザーブ制御を実行させるトルクリザーブ制御部と、を備える
車両の制御装置。 - 前記トルクリザーブ制御部は、前記第1のシフト位置と前記第2のシフト位置との間でのシフト切換操作が行われたときに前記トルクリザーブ制御を開始させ、前記動力伝達系が実際にアウトギヤ状態からインギヤ状態に切り換わるまでの間、前記トルクリザーブ制御を継続させる
請求項1に記載の車両の制御装置。 - 前記トルクリザーブ制御部は、さらに、動力伝達系がアウトギヤ状態であるシフト位置から前記第1のシフト位置又は前記第2のシフト位置へのシフト切換操作が行われたときに前記トルクリザーブ制御を実行させる
請求項1又は2に記載の車両の制御装置。 - 前記トルクリザーブ制御部は、あらかじめ設定された前記第1のシフト位置と前記第2のシフト位置との間でのシフト切換操作用の制御時間又は前記アウトギヤ状態であるシフト位置から前記第1のシフト位置又は前記第2のシフト位置へのシフト切換操作用の制御時間のいずれかを選択して前記トルクリザーブ制御を実行させる
請求項3に記載の車両の制御装置。 - 前記トルクリザーブ制御部は、前記第1のシフト位置と前記第2のシフト位置との間でのシフト切換操作用の制御時間又は前記アウトギヤ状態であるシフト位置から前記第1のシフト位置又は前記第2のシフト位置へのシフト切換操作用の制御時間を自動変速機の作動油の油温に基づいて設定する
請求項4に記載の車両の制御装置。 - 前記トルクリザーブ制御部は、自動変速機の油温に基づいてリザーブトルクの値を設定する
請求項1~5のいずれか1項に記載の車両の制御装置。 - 前記トルクリザーブ制御部は、前記エンジンの吸気量及び点火角を制御することにより前記エンジンの出力トルクを増大させる
請求項1~6のいずれか1項に記載の車両の制御装置。
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EP17865175.8A EP3533984A4 (en) | 2016-10-31 | 2017-08-30 | VEHICLE CONTROL DEVICE |
JP2018547172A JP6717965B2 (ja) | 2016-10-31 | 2017-08-30 | 車両の制御装置 |
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CN112594373B (zh) * | 2020-12-24 | 2022-06-28 | 潍柴动力股份有限公司 | 一种变速箱中液压油温度的控制方法 |
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