WO2014054677A1 - エンジン自動停止機能付き車両の制御装置 - Google Patents
エンジン自動停止機能付き車両の制御装置 Download PDFInfo
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- WO2014054677A1 WO2014054677A1 PCT/JP2013/076790 JP2013076790W WO2014054677A1 WO 2014054677 A1 WO2014054677 A1 WO 2014054677A1 JP 2013076790 W JP2013076790 W JP 2013076790W WO 2014054677 A1 WO2014054677 A1 WO 2014054677A1
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- engine
- vehicle
- valve timing
- stop function
- operated
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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
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0223—Variable control of the intake valves only
- F02D13/0234—Variable control of the intake valves only changing the valve timing only
- F02D13/0238—Variable control of the intake valves only changing the valve timing only by shifting the phase, i.e. the opening periods of the valves are constant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
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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
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/08—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing for rendering engine inoperative or idling
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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
- F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
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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
- 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
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- 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
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- 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
- F02N11/0829—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode related to special engine control, e.g. giving priority to engine warming-up or learning
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- 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
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
- F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
- F02N15/067—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement the starter comprising an electro-magnetically actuated lever
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- 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
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/004—Aiding engine start by using decompression means or variable valve actuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34459—Locking in multiple positions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34463—Locking position intermediate between most retarded and most advanced positions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/01—Starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/03—Stopping; Stalling
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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
- F02D2041/001—Controlling intake air for engines with variable valve actuation
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- 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
- F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators
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- 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
- F02N11/0803—Circuits or control means specially adapted for starting of engines characterised by means for initiating engine start or stop
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- 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
- F02N2011/0881—Components of the circuit not provided for by previous groups
- F02N2011/0888—DC/DC converters
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- 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
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/06—Parameters used for control of starting apparatus said parameters being related to the power supply or driving circuits for the starter
- F02N2200/061—Battery state of charge [SOC]
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- 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
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/08—Parameters used for control of starting apparatus said parameters being related to the vehicle or its components
- F02N2200/0802—Transmission state, e.g. gear ratio or neutral state
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- 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
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/08—Parameters used for control of starting apparatus said parameters being related to the vehicle or its components
- F02N2200/0803—Parking brake state
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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
- Y02T10/12—Improving ICE efficiencies
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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 control device for a vehicle with an automatic engine stop function, which includes an engine as a power source and a valve timing changing mechanism capable of changing the valve timing of the engine.
- Patent Document 1 As a valve timing control device for an engine, a technique described in Patent Document 1 is disclosed.
- This publication includes a valve timing changing mechanism that operates using an oil pump that is driven by the driving force of the engine as a hydraulic pressure source.
- the valve timing is set to a predetermined advance position (most retarded position). Therefore, the valve timing changing mechanism is activated by delaying the engine stop for a predetermined time in order to move and lock to a position substantially intermediate between the most advanced angle position and slightly closer to the advanced angle position.
- the predetermined time for delaying the engine stop may become longer. This means that the engine ignition state continues even though the ignition switch is turned off, which makes the driver feel uncomfortable.
- the engine is stopped with the ignition switch turned on, such as a vehicle with an automatic engine stop function (for example, a hybrid vehicle or a vehicle with an idling stop function), the engine stops even if the ignition switch is turned off. Therefore, the valve timing changing mechanism cannot be operated.
- the present invention has been made paying attention to the above problem, and an object of the present invention is to provide a control device for a vehicle with an automatic engine stop function that can suppress a sense of discomfort to the driver and move a valve timing mechanism to a predetermined position. .
- the control apparatus for a vehicle with an engine automatic stop function when the engine is inactive and the shift lever is operated to the parking range, the engine is started and the valve timing changing means is operated. Oil was supplied, changed to a predetermined advance position and locked, and then the engine was stopped.
- the system stops while suppressing the driver's uncomfortable feeling caused by the ignition state of the engine with the ignition switch turned off.
- the valve timing mechanism can be moved to a predetermined advance position.
- 1 is an overall system diagram illustrating a hybrid vehicle according to a first embodiment.
- 3 is a flowchart illustrating a valve timing control process executed in the hybrid vehicle control apparatus according to the first embodiment.
- 3 is a time chart showing a valve timing control process executed when a P range is selected in the hybrid vehicle control apparatus of the first embodiment.
- FIG. 1 is an overall system diagram illustrating a hybrid vehicle according to a first embodiment.
- the drive system of the hybrid vehicle in the first embodiment includes an engine E, a first clutch CL1, a motor generator MG, a second clutch CL2, a belt type continuously variable transmission CVT, and a propeller shaft. It has PS, differential gear DF, left drive shaft DSL, right drive shaft DSR, left front wheel FL (drive wheel), and right front wheel FR (drive wheel).
- the engine E is, for example, a gasoline engine, and the valve opening degree of the throttle valve is controlled based on a control command from the engine controller 1 described later. Further, the engine E is provided with a valve timing changing mechanism IVC capable of changing the intake timing. Specifically, the IVC pump OP1 operated by the engine E is operated as a hydraulic pressure source, and the valve timing on the intake side can be changed from the most retarded position to the most advanced position. Further, it has a lock mechanism that can fix the valve timing to a predetermined timing even when the IVC pump OP1 is not operated.
- the lock mechanism includes: a first lock mechanism that can be fixed at the most retarded angle position; and a second lock mechanism that can be fixed at an intermediate position located slightly on the advance side of the intermediate position between the most retarded angle position and the most advanced angle position. It is configured.
- the valve timing fixed by the first lock mechanism is described as a decompression valve tie (most retarded position)
- the valve timing fixed by the second lock mechanism is described as an intermediate lock valve tie.
- the valve timing set when the engine E is idling is described as idle time valve timing.
- the first clutch CL1 is a clutch interposed between the engine E and the motor generator MG, and slips by the control hydraulic pressure generated by the first clutch hydraulic unit based on the control command from the first clutch controller 5.
- the fastening / opening is controlled including the fastening.
- Motor generator MG is a synchronous motor generator in which a permanent magnet is embedded in a rotor and a stator coil is wound around a stator, and applies a three-phase alternating current generated by inverter 2a based on a control command from motor controller 2. Is controlled.
- the motor generator MG can operate as an electric motor that is driven to rotate by receiving power supplied from the battery 20 (hereinafter, this state is referred to as “powering”), or when the rotor is rotated by an external force.
- powering this state is referred to as “powering”), or when the rotor is rotated by an external force.
- the second clutch CL2 is a clutch interposed between the motor generator MG and the left and right front wheels FL, FR. Based on the control command from the CL2 controller 6, the second clutch CL2 is controlled by the control hydraulic pressure generated by the second clutch hydraulic unit. The fastening and opening are controlled including slip fastening.
- the belt-type continuously variable transmission CVT is composed of a primary pulley, a secondary pulley, and a belt hung around these pulleys.
- the belt-type continuously variable transmission can change the gear ratio steplessly by changing the pulley groove width by hydraulic control. It is a step transmission, and the gear ratio is controlled based on a control command from the CVT controller 7.
- the belt type continuously variable transmission CVT has a transmission pump OP2 driven by a motor generator MG, and even when the engine is stopped, the hydraulic pressure is secured by the operation of the motor generator MG, and the gear ratio or The engagement state of the two clutch CL2 is configured to be controllable.
- the output shaft of the belt type continuously variable transmission CVT is connected to the left and right front wheels FL and FR via a propeller shaft PS, a differential gear DF, a left drive shaft DSL, and a right drive shaft DSR as vehicle drive shafts.
- the first clutch CL1 and the second clutch CL2 are, for example, wet multi-plate clutches that can continuously control the oil flow rate and hydraulic pressure with a proportional solenoid.
- the first travel mode is an electric vehicle travel mode (hereinafter abbreviated as “EV travel mode”) as a motor use travel mode that travels using only the power of the motor generator MG as a power source with the first clutch CL1 opened. It is.
- the second travel mode is an engine use travel mode (hereinafter abbreviated as “HEV travel mode”) in which the first clutch CL1 is engaged and the engine E is included in the power source.
- HEV travel mode engine use travel mode
- the “HEV travel mode” has three travel modes of “engine travel mode”, “motor assist travel mode”, and “travel power generation mode”.
- engine running mode the drive wheels are moved using only the engine E as a power source.
- motor assist travel mode the drive wheels are moved by using the engine E and the motor generator MG as power sources.
- the “running power generation mode” causes the motor generator MG to function as a generator at the same time as the drive wheels RR and RL are moved using the engine E as a power source.
- motor generator MG is operated as a generator using the power of engine E. Further, during deceleration operation, braking energy is regenerated to generate electric power by the motor generator MG and used for charging the battery 20.
- a power generation mode in which the motor generator MG is operated as a generator using the power of the engine E when the vehicle is stopped.
- the motor generator MG is operated as a generator using the power of the engine E when the vehicle is stopped.
- the integrated controller 10 manages the energy consumption of the entire vehicle and has a function for running the vehicle with maximum efficiency. Various sensor information and range position information detected by the range position sensor 8 provided on the shift lever. , The on / off information of the ignition switch 9 and the information obtained via the CAN communication line 11 are input.
- the integrated controller 10 also controls the operation of the engine E according to the control command to the engine controller 1, the operation control of the motor generator MG based on the control command to the motor controller 2, and the first control command to the first clutch controller 5. Engagement / release control of the clutch CL1, engagement / release control of the second clutch CL2 by a control command to the second clutch controller 6, and shift control by a control command to the CVT controller 7 are performed.
- valve timing control processing Next, a description will be given of the valve timing control process in which the vehicle is stopped and is in a position other than the intermediate lock valve tie to control the intermediate lock valve tie.
- the valve timing changing mechanism IVC controls to the decompression tie. This is because when the engine is restarted, where the friction is considered to be sufficiently reduced due to the end of warm-up, the engine speed is set so that the engine speed can quickly get out of the low speed range where the engine speed and the vehicle body side resonate (eg, 200 rpm to 400 rpm). This is to raise the speed quickly. That is, by using a decompression tie, the intake valve closing timing when moving toward the piston top dead center is delayed, and the pumping load in the engine cylinder is reduced.
- the decompression valve tie and the idle valve tie are extremely retarded because of the demand to increase the fuel efficiency to the limit and the fact that the motor generator MG can recover even if the engine start by the normal starter motor fails.
- the amount of control (the magnitude of the angle to move from the retarded position to the advanced position) is larger than that of the engine vehicle, which may take time.
- the hybrid vehicle of the first embodiment employs an inexpensive valve timing changing mechanism IVC that uses the IVC pump OP1 driven by the engine E as a hydraulic pressure source, an intermediate lock is provided if the engine E is not operating. It cannot be moved to Valtai. That is, it may take time from the ignition off to the stop of the engine E, which may give the driver a sense of discomfort.
- the system may stop with the decompression tie.
- the vehicle without waiting for the ignition off, in a state where there is a high possibility that the ignition will be off, and especially when the driver does not feel uncomfortable, the vehicle is moved to the intermediate lock valve tie immediately before the engine stops.
- the above-described problems are solved. Specifically, when the P range position is detected in the engine stop state, the engine E is started and moved to the intermediate lock valve tie immediately before the engine stop when the engine stop condition is satisfied.
- FIG. 2 is a flowchart showing a valve timing control process executed in the hybrid vehicle control apparatus of the first embodiment.
- step S1 it is determined whether or not the shift position is in the P range. If it is determined that the shift position is in the P range, the process proceeds to step S2, and otherwise the control flow is terminated.
- step S2 it is determined whether or not the vehicle is in the EV travel mode. If the vehicle is in the EV travel mode, the process proceeds to step S3.
- step S3 it is determined whether or not the valve timing changing mechanism IVC is positioned at the intermediate lock valve tie. When the valve timing change mechanism IVC is positioned at the intermediate lock valve tie, this control flow is terminated. Proceed to S4.
- step S4 the engine is started. Specifically, the first clutch CL1 is engaged, the engine speed is increased by controlling the rotational speed of the motor generator MG, and then fuel is supplied to enter the idle state.
- step S5 the first timer starts counting up.
- step S6 the power generation request threshold SOC1 at which power generation in the power generation mode is started is changed to SOC2 larger than SOC1. If the current SOC is higher than SOC2, power generation in the power generation mode is not performed, and the engine E simply maintains the idle state.
- step S7 it is determined whether or not the SOC is larger than SOC2. If it is determined that the SOC is larger, the process proceeds to step S8. Otherwise, step S6 is repeated.
- step S8 it is determined whether the count value of the first timer has passed a predetermined time T1 (for example, 20 seconds). If not, this step is repeated until the time has elapsed. Go to step S9. In other words, the operating state of the engine E is maintained until the predetermined time T1 elapses even if the SOC becomes SOC2 or higher in the power generation mode. This avoids a sense of incongruity caused by frequent start / stop of the engine E.
- a predetermined time T1 for example, 20 seconds
- the SOC remains at the normal power generation request threshold SOC1
- the battery power consumption may become severe depending on the situation when the vehicle is stopped. A scene that is required promptly is assumed. For example, if the motor idling state due to the idling rotation of the motor generator MG is maintained after the engine is stopped, or if the air conditioner is continuously used while the vehicle is stopped, the power consumption of the battery 20 is severe, and there is a possibility that it will soon fall below SOC1. Because there is. Therefore, when the P range is selected in the state of the EV travel mode and the engine E is started, SOC1 is changed to SOC2, and a larger amount of electricity stored in the battery 20 is secured.
- step S9 it is determined whether or not the engine stop condition is satisfied. If it is determined that the condition is satisfied, the process proceeds to step S10. Otherwise, this step is repeated until it is satisfied.
- the engine stop condition includes conditions other than the ignition off, for example, a situation where the air conditioner is deactivated or the door is opened, and the vehicle leaves the vehicle while the ignition is on.
- step S10 advance processing of the valve timing changing mechanism IVC is performed before the engine is stopped, and movement to the intermediate lock valve tie and locking are performed.
- step S11 the second timer starts counting up.
- step S12 it is determined whether or not the count value of the second timer has elapsed a predetermined time T2 (for example, 3 seconds). If it is determined that the time has elapsed, the process proceeds to step S14.
- step S13 it is determined whether or not the second lock mechanism has been locked by moving to the intermediate lock valve tie. If it is determined that the lock has been completed, the process proceeds to step S14. If it is determined that the lock has not been completed, Returning to step S12, the advance processing is continued.
- Whether or not the lock has been completed is determined by providing the second lock mechanism with a hydraulic switch, a contact switch, or the like, thereby determining whether the lock has been completed, or outputting an operation request signal for the second lock mechanism. The determination may be made based on whether or not a predetermined time has passed.
- an engine stop process is executed.
- FIG. 3 is a time chart showing a valve timing control process executed when the P range is selected in the hybrid vehicle control apparatus of the first embodiment. This time chart shows a case where the D range position is operated to the P range position when the engine is not operated while the vehicle is stopped.
- the state before starting the engine is a vehicle stop state in which the engine E is operating, the first clutch CL1 is released, and the second clutch CL2 is released.
- the motor generator MG is controlled so as to maintain the idle rotational speed.
- the first clutch CL1 is engaged, the engine start process by the motor generator MG is started, and the count up of the first timer is started.
- the valve timing changing mechanism IVC is in the decompression tie because the engine is stopped in the EV travel mode.
- the power generation request threshold SOC1 is changed to SOC2, and although the SOC is larger than SOC1 but smaller than SOC2, the power generation mode is selected, and the power generation by the motor generator MG is performed by the driving force of the engine E.
- the hydraulic oil is supplied by the IVC pump OP1 (pump) driven by the engine E, and the intake valve can be changed to the advance side or the retard side within a predetermined range.
- a valve timing changing mechanism IVC valve timing changing means having a second locking mechanism that can be locked to a lock valve tie (predetermined advance position), and a shift lever having a parking range that is operated by a driver and achieves a vehicle parking state. 8
- engine E is inactive and the shift lever is operated to the parking range, engine E is started to supply hydraulic fluid, and valve timing change mechanism IVC is activated to change to an intermediate lock valve tie.
- Steps S1, S2, S3, S4, S10, S13, and S14 (valve timing control means) for locking and then stopping the engine E were provided. Therefore, since it can move to the intermediate lock valve tie when the parking range is selected, even if the ignition switch is subsequently turned off and the vehicle system is stopped, the engine can be reliably restarted when the ignition is turned on next time.
- step S6 When the stored amount of the battery 20 is less than SOC1 (predetermined value), the motor generator MG generates electric power using the driving force of the engine E, and is charged so that the stored amount becomes SOC1 or more (charging means)
- step S6 SOC1 is changed to SOC2 (second predetermined value) larger than the SOC1, and the valve timing changing mechanism IVC is operated after the charged amount becomes SOC2 or more.
- SOC1 is changed to SOC2 (second predetermined value) larger than the SOC1
- the valve timing changing mechanism IVC is operated after the charged amount becomes SOC2 or more.
- step S8 and step S10 after the engine E is started, the valve timing changing mechanism IVC is operated after a predetermined time T1 has elapsed.
- the operating state of the engine E is maintained until the predetermined time T1 elapses even if the SOC becomes SOC2 or higher in the power generation mode.
- the hybrid vehicle is exemplified, but the same effect can be obtained even in a vehicle with an idling stop function.
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
Description
CL1 第1クラッチ
MG モータジェネレータ
CL2 第2クラッチ
CVT ベルト式無段変速機
1 エンジンコントローラ
2 モータコントローラ
5 第1クラッチコントローラ
6 第2クラッチコントローラ
7 CVTコントローラ
8 レンジ位置センサ
9 イグニッションスイッチ
10 統合コントローラ
20 バッテリ
IVC バルブタイミング変更機構
OP1 IVCポンプ
OP2 変速機用ポンプ
次に、停車中であって中間ロックバルタイ以外の位置にいる状態から中間ロックバルタイの位置に制御するバルブタイミング制御処理について説明する。まず、バルブタイミング制御処理の必要性について説明する。バルブタイミング変更機構IVCは、例えばエンジンEの暖気が終了している状態でHEV走行モードからEV走行モードに変更され、エンジンEを停止する場合には、デコンプバルタイに制御する。これは、暖気終了によりフリクションが十分に低下していると考えられるエンジン再始動時に、エンジン回転数と車体側とが共振する低回転数領域(例えば200rpm~400rpm)を素早く抜けるためにエンジン回転数を素早く上昇させるためである。即ち、デコンプバルタイとすることで、ピストン上死点に向かう際の吸気バルブ閉塞タイミングを遅らせ、エンジンシリンダ内のポンピング負荷の軽減を図るものである。
ステップS1では、シフト位置がPレンジか否かを判断し、Pレンジと判断した場合はステップS2に進み、それ以外の場合は本制御フローを終了する。
ステップS2では、EV走行モードか否かを判断し、EV走行モードの場合はステップS3に進み、HEV走行モードの場合はステップS9に進む。
ステップS3では、バルブタイミング変更機構IVCが中間ロックバルタイに位置するか否かを判断し、中間ロックバルタイに位置しているときには本制御フローを終了し、中間ロックバルタイに位置していない場合はステップS4に進む。
ステップS5では、第1タイマーのカウントアップを開始する。
ステップS6では、発電モードによる発電が開始される発電要求閾値SOC1を、SOC1より大きなSOC2に変更する。仮に現時点のSOCがSOC2よりも高ければ、特に発電モードによる発電は行われず、単にエンジンEがアイドル状態を維持する。
ステップS7では、SOCがSOC2より大きいか否かを判断し、大きいと判断した場合はステップS8に進み、それ以外の場合はステップS6を繰り返す。すなわち、SOCがSOC1より大きくSOC2未満の場合は、SOC2以上となるまで発電モードが継続される。
ステップS8では、第1タイマーのカウント値が予め設定された所定時間T1(例えば20秒)を経過したか否かを判断し、経過していない場合は経過するまで本ステップを繰り返し、経過してからステップS9へ進む。言い換えると、SOCが発電モードによりSOC2以上となっても所定時間T1が経過するまではエンジンEの作動状態を維持する。これにより、頻繁にエンジンEの始動・停止が繰り返されることによる違和感を回避するものである。
ステップS11では、第2タイマーのカウントアップを開始する。
ステップS12では、第2タイマーのカウント値が所定時間T2(例えば3秒)経過したか否かを判断し、経過したと判断した場合はステップS14に進み、それ以外の場合はステップS13に進む。
ステップS13では、中間ロックバルタイに移動して第2ロック機構によるロックが完了したか否かを判断し、ロック完了と判断した場合にはステップS14に進み、ロック完了していないと判断した場合はステップS12に戻って進角処理を継続する。尚、ロック完了が達成されたか否かは、第2ロック機構に油圧スイッチや接触スイッチ等を備え、これによりロック完了を判断してもよいし、第2ロック機構の作動要求信号を出力してから所定時間が経過したか否かで判断してもよい。
ステップS14では、エンジン停止処理を実行する。
同時に、発電要求閾値SOC1がSOC2に変更され、SOCがSOC1よりも大きいものの、SOC2よりも小さいため、発電モードが選択され、エンジンEの駆動力によりモータジェネレータMGによる発電が行われる。
(1)エンジンEにより駆動されるIVCポンプOP1(ポンプ)により作動油を供給し、吸気バルブを所定範囲で進角側もしくは遅角側に変更可能であって、作動油の有無にかかわらず中間ロックバルタイ(所定の進角位置)にロック可能な第2ロック機構を有するバルブタイミング変更機構IVC(バルブタイミング変更手段)と、運転者により操作され、車両駐車状態を達成するパーキングレンジを有するシフトレバー8と、エンジンEが非作動状態で、シフトレバーがパーキングレンジに操作された場合、エンジンEを始動して作動油を供給し、バルブタイミング変更機構IVCを作動して中間ロックバルタイに変更してロックし、その後、エンジンEを停止するステップS1,S2,S3,S4,S10,S13,S14(バルブタイミング制御手段)と、を備えた。
よって、パーキングレンジが選択された段階で中間ロックバルタイに移動できるため、その後にイグニッションスイッチがオフとされ、車両システムが停止したとしても、次回のイグニッションオン時に確実にエンジン再始動できる。
これにより、蓄電量確保までに必要な時間が長くなるため継続的にエンジン作動状態にでき、エンジン停止後もバッテリ20の蓄電量に余裕があることから長時間エンジン停止状態を継続できるため、頻繁にエンジン停止・始動が繰り返されるといった事態を回避できる。
言い換えると、SOCが発電モードによりSOC2以上となっても所定時間T1が経過するまではエンジンEの作動状態を維持する。これにより、頻繁にエンジンEの始動・停止が繰り返されることによる違和感を回避することができる。
なお、本実施例では、ハイブリッド車両を例示したが、アイドリングストップ機能付き車両でも、同様の効果を得ることができる。
Claims (3)
- エンジンにより駆動されるポンプにより作動油を供給し、吸気バルブを所定範囲で進角側もしくは遅角側に変更可能であって、前記作動油の有無にかかわらず所定の進角位置にロック可能なバルブタイミング変更手段と、
運転者により操作され、車両駐車状態を達成するパーキングレンジを有するシフトレバーと、
前記エンジンが非作動状態で、前記シフトレバーがパーキングレンジに操作された場合、前記エンジンを始動して前記作動油を供給し、前記バルブタイミング変更手段を作動して前記所定の進角位置に変更してロックし、その後、前記エンジンを停止するバルブタイミング制御手段と、
を備えたことを特徴とするエンジン自動停止機能付き車両の制御装置。 - 請求項1に記載のエンジン自動停止機能付き車両の制御装置において、
バッテリの蓄電量が所定値未満のときは、前記エンジンの駆動力を用いて発電し、蓄電量が前記所定値以上となるように充電する充電手段を有し、
前記バルブタイミング制御手段は、前記所定値を該所定値よりも大きな第2の所定値に変更し、蓄電量が前記第2の所定値以上となってから前記バルブタイミング変更手段を作動することを特徴とするエンジン自動停止機能付き車両の制御装置。 - 請求項1または2に記載のエンジン自動停止機能付き車両の制御装置において、
前記バルブタイミング制御手段は、前記エンジンを始動後、所定時間経過した後に前記バルブタイミング変更手段を作動することを特徴とするエンジン自動停止機能付き車両の制御装置。
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JP2016148298A (ja) * | 2015-02-13 | 2016-08-18 | アイシン精機株式会社 | 内燃機関の吸気装置および内燃機関 |
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