WO2013005843A1 - 制御装置 - Google Patents
制御装置 Download PDFInfo
- Publication number
- WO2013005843A1 WO2013005843A1 PCT/JP2012/067375 JP2012067375W WO2013005843A1 WO 2013005843 A1 WO2013005843 A1 WO 2013005843A1 JP 2012067375 W JP2012067375 W JP 2012067375W WO 2013005843 A1 WO2013005843 A1 WO 2013005843A1
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- WIPO (PCT)
- Prior art keywords
- torque
- state
- control
- electrical machine
- rotating electrical
- Prior art date
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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
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
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- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
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- B60W2710/083—Torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2300/00—Purposes or special features of road vehicle drive control systems
- B60Y2300/42—Control of clutches
- B60Y2300/429—Control of secondary clutches in drivelines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Definitions
- a rotary electric machine is provided in a power transmission path connecting the internal combustion engine and the wheel, and a first friction engagement device is provided between the internal combustion engine and the rotary electric machine, and a second is provided between the rotary electric machine and the wheel.
- the present invention relates to a control device that controls a vehicle drive device provided with a friction engagement device.
- Patent Document 1 As a control device that controls the vehicle drive device as described above, a device described in JP 2010-149640 A (Patent Document 1) is already known. Hereinafter, in the description of the background art section, reference numerals in Patent Document 1 (including names of corresponding members as necessary) are quoted in [].
- This control device changes the rotating electrical machine [motor MG] from the stopped state of the internal combustion engine [engine E] and the released state of the first friction engagement device [first clutch CL1] to the first friction engagement device as a direct engagement state.
- the internal combustion engine start control for starting the internal combustion engine with the torque of the engine is executable.
- rotation speed feedback control is performed to match the rotation speed of the rotating electrical machine with the target rotation speed, and at this time, the second friction engagement device [second gear in the transmission mechanism [automatic transmission AT] is selected.
- the target transmission torque capacity [target clutch transmission torque command TCL2] is controlled so as to transmit a predetermined torque in the slip engagement state.
- the control device disclosed in Patent Document 1 includes a difference between the actual torque of the rotating electrical machine and the maximum torque that can be output by the rotating electrical machine [torque deviation amount ⁇ T], or a difference between the engaging members on both sides of the second friction engagement device.
- the target transmission torque capacity of the second friction engagement device is determined based on the rotational speed [rotational speed difference ⁇ N]. Thereby, it is supposed that the slip (slip) state of the second friction engagement device can be optimized, and the torque fluctuation caused by the error in the transmission torque capacity of the second friction engagement device can be suppressed.
- the determination control of the target transmission torque capacity of the second friction engagement device as described above is executed only during the period in which the first friction engagement device is in the slip engagement state, and the direct engagement is performed. It will not be executed after the status has been set.
- the first friction engagement device since the first friction engagement device is controlled to a predetermined transmission torque capacity to be in the slip engagement state, when there is an error in the transmission torque capacity of the first friction engagement device, When the two friction engagement device is changed from the slip engagement state to the direct connection engagement state and the rotation speed feedback control of the rotating electrical machine is finished and the torque control is started, the two friction engagement devices are transmitted to the wheels via the second friction engagement device.
- a rotary electric machine is provided in a power transmission path connecting the internal combustion engine and the wheel, and a first friction engagement device, the rotary electric machine and the wheel are provided between the internal combustion engine and the rotary electric machine.
- the characteristic configuration of the control device that controls the vehicle drive device provided with the second friction engagement device between the first friction engagement device and the first friction engagement device is in the released state and the second friction engagement device is directly connected.
- the driving force is transmitted between the internal combustion engine and the wheel in the engaged state of the first friction engagement device from the state where the driving force is transmitted between the rotating electrical machine and the wheel in the combined state.
- the rotation state control for controlling the rotation state of the rotating electrical machine to the target rotation state is performed and the second frictional engagement is performed. Transition from slip engagement state to direct engagement state Hydraulic pressure for controlling the hydraulic pressure supplied to the second friction engagement device based on the torque of the rotating electrical machine during the rotation state control after the first friction engagement device has shifted to the direct engagement state.
- the adjustment control is executed.
- the “rotary electric machine” is used as a concept including any of a motor (electric motor), a generator (generator), and a motor / generator functioning as both a motor and a generator as necessary.
- the “released state” means a state in which rotation and driving force are not transmitted between the two engaging members engaged by the target frictional engagement device.
- the “slip engagement state” means a state in which the two engagement members are engaged so as to be able to transmit a driving force in a state where there is a difference in rotational speed.
- the “directly engaged state” means a state in which the two engaging members are engaged in a state of rotating integrally.
- the “engaged state” is used as a concept including both the slip engagement state and the direct engagement state.
- the “rotation state” is used as a concept including a rotation position, a rotation speed, and a rotation acceleration. Therefore, in the “rotation state control”, the rotational position feedback control for controlling the rotational position of the rotating electrical machine to be the target rotational position, the rotational speed feedback control for controlling the rotational speed of the rotating electrical machine to be the target rotational speed, Alternatively, rotational acceleration feedback control for controlling the rotational acceleration of the rotating electrical machine to be the target rotational acceleration is included.
- the rotation state control of the rotating electrical machine may be executed in the slip engagement state of the second friction engagement device.
- the torque of the internal combustion engine is adjusted while the influence of the error in the transmission torque capacity of the first friction engagement device is eliminated.
- the output torque of the internal combustion engine itself may have an error.
- the rotational state of the rotating electrical machine When an error is included in the output torque of the internal combustion engine, the rotational state of the rotating electrical machine temporarily becomes inconsistent with the target rotational state due to the error, but the rotating electrical machine is executed by executing the rotational state control.
- the output torque of the rotating electrical machine is successively increased or decreased, and the rotating state of the rotating electrical machine becomes a state that matches the target rotating state.
- the second friction engagement device shifts from the slip engagement state to the direct engagement state
- the rotational speed of the rotating electrical machine is uniquely determined according to the rotational speed of the wheel, and the rotating electrical machine has a predetermined torque. It will be in the state to output.
- the torque transmitted to the wheels includes the output torque during the rotation state control and a predetermined value after the transition to the direct engagement state of the second friction engagement device.
- a torque step corresponding to the difference from the torque can occur.
- the output torque is based on the output torque of the rotating electrical machine during the rotation state control. Can be brought close to a predetermined torque after the transition to the direct engagement state of the second friction engagement device. Therefore, generation
- target torque determination control for determining a target torque of the rotating electrical machine based on a difference between a required driving force for driving the wheel and a torque transmitted from the internal combustion engine to the rotating electrical machine.
- a rotational speed feedback control is performed in which a correction torque is applied to the target torque to control the rotational speed of the rotating electrical machine to coincide with the target rotational speed, and the required driving force and the rotational speed are controlled. It is preferable that the hydraulic pressure adjustment control is executed based on the correction torque of feedback control.
- the control method of the rotating electrical machine it is possible to use the target torque determination control and the rotational speed feedback control together as in this configuration.
- the rotating electrical machine is controlled based on the target torque determined by executing the target torque determination control and the correction torque applied to the target torque by executing the rotation speed feedback control.
- the operation control of the rotating electrical machine can be performed with high followability.
- the control method of the second friction engagement device as one aspect, the control of the supply hydraulic pressure based on the required driving force and the control of the supply hydraulic pressure based on the correction torque of the rotational speed feedback control are combined as in this configuration. Is possible. By configuring the hydraulic pressure adjustment control based on both the required driving force and the correction torque of the rotational speed feedback control, it is possible to control the operation of the second friction engagement device with high follow-up performance, and to increase the torque step. Can be effectively suppressed.
- the hydraulic pressure adjustment control is executed based on the correction torque calculated by excluding the amount corresponding to the rotation change torque of the rotating electrical machine for changing the rotation speed toward the target rotation speed during the rotation speed feedback control. It is preferable to adopt a configuration to do so.
- the correction torque to be added to the target torque of the rotating electrical machine in the rotational speed feedback control includes a rotational change torque (inertia) for changing the rotational speed of the rotating electrical machine toward the target rotational speed. Torque).
- a rotational change torque in addition to the compensation for the torque of the internal combustion engine, the correction torque to be added to the target torque of the rotating electrical machine in the rotational speed feedback control includes a rotational change torque (inertia) for changing the rotational speed of the rotating electrical machine toward the target rotational speed. Torque).
- the correction torque calculated by excluding the portion corresponding to the rotation change torque is calculated. Therefore, in the hydraulic pressure adjustment control, the stationary error due to the torque error of the internal combustion engine is reflected.
- the hydraulic pressure supplied to the two-friction engagement device can be appropriately determined, and the occurrence of a torque step can be effectively suppressed.
- a transmission torque capacity of the second friction engagement device is determined based on a calculated value obtained by integrating the correction torque over time, and the second friction engagement device is determined based on the transmission torque capacity. It is preferable that the hydraulic pressure to be supplied is determined.
- the correction torque can be gradually reduced to zero over time. Therefore, it is possible to effectively suppress the occurrence of a torque step before and after the transition from the slip engagement state to the direct engagement state of the second friction engagement device.
- the transmission torque capacity of the second friction engagement device is changed by performing the hydraulic pressure adjustment control, but the transmission torque capacity of the second friction engagement device can be gradually changed by gradually reducing the correction torque. it can. Therefore, it is possible to suppress a change in the driving force transmitted to the wheels in accordance with a change in the transmission torque capacity of the second friction engagement device, and it is possible to suppress the vehicle driver from feeling uncomfortable. .
- the correction torque in the rotation speed feedback control is instantaneous.
- the rotating electrical machine is in a state of outputting the target torque determined by executing the target torque determination control.
- a torque step corresponding to the correction torque may occur in the torque transmitted to the wheel.
- torque control for controlling the output torque of the rotating electrical machine to coincide with the target torque can be further executed, and the second friction engagement device is directly engaged during execution of the hydraulic pressure adjustment control.
- the present invention can be suitably applied to a configuration in which the control state of the rotating electrical machine is shifted from the rotational speed feedback control to the torque control when it is determined that the state has been reached. In this way, it is possible to effectively suppress the occurrence of a torque step before and after the transition of the engagement state of the second friction engagement device.
- the rotation is performed when the rotational speed feedback control is shifted to the torque control. It is preferable to perform a transition torque control that gradually changes the output torque of the electric machine from the torque during the rotational speed feedback control to the target torque.
- the correction torque is gradually reduced by the transition torque control.
- the torque of the rotating electrical machine can be gradually changed to the target torque to suppress the occurrence of a torque step.
- the hydraulic pressure adjustment control is executed in a predetermined period before the transition including the transition from the slip engagement state to the direct engagement state of the second friction engagement device.
- the hydraulic pressure adjustment control executed during a predetermined period before the transition from the slip engagement state to the direct engagement state of the second friction engagement device effectively enables the generation of the torque step at the transition. Can be suppressed.
- the hydraulic pressure adjustment control is continuously performed until the second friction engagement device is shifted from the slip engagement state to the direct engagement state. It is preferable to adopt a configuration that executes
- internal combustion engine start control for starting the internal combustion engine with the torque of the rotating electrical machine with the first friction engagement device in an engaged state from the stopped state of the internal combustion engine and the released state of the first friction engagement device.
- the rotation state control is executed when the internal combustion engine start control is executed, and the hydraulic pressure adjustment control is executed after the first friction engagement device enters the direct engagement state through the slip engagement state. It is preferable to adopt a configuration to do so.
- the first friction engagement device Before and after starting the internal combustion engine, the first friction engagement device goes through a slip engagement state and becomes a direct engagement state. In the direct engagement state of the first friction engagement device, the transmission torque capacity of the first friction engagement device The torque of the internal combustion engine can be transmitted to the rotating electrical machine side in a state where the influence of the error is eliminated. After that, by executing the hydraulic pressure adjustment control after the first friction engagement device is in the direct engagement state, it is possible to appropriately determine the hydraulic pressure supplied to the second friction engagement device, and to generate a torque step. It can be effectively suppressed.
- a state in which a driving force for rotating the wheel in the forward direction of the vehicle from the rotating electric machine toward the wheel along the power transmission path is transmitted as a positive drive transmission state, and the second frictional engagement is performed.
- a state in which the rotation speed of the engagement member on the rotating electrical machine side is higher than the rotation speed of the engagement member on the wheel side is defined as a positive relative rotation state, and the drive transmission state and the relative It is preferable that the hydraulic pressure supplied to the second friction engagement device is substantially zeroed by prohibiting the execution of the hydraulic pressure adjustment control when it is determined that the sign of the rotational state does not match.
- the hydraulic pressure adjustment control is executed in a situation where the direction of the torque transmitted via the second friction engagement device is opposite to the intention of the driver of the vehicle in relation to the relative rotation state. Ban.
- the hydraulic pressure adjustment control it is possible to avoid the inconvenience of correcting the output torque of the rotating electrical machine during the rotation state control in the wrong direction by the hydraulic pressure adjustment control, and to suppress the occurrence of a torque step.
- the control device 4 is a drive device unit that controls the drive device 1.
- the drive device 1 according to the present embodiment is a vehicle drive device (hybrid vehicle) for driving a vehicle (hybrid vehicle) 6 including both the internal combustion engine 11 and the rotating electrical machine 12 as a driving force source for the wheels 15.
- the control device 4 according to the present embodiment will be described in detail.
- driving connection means a state where two rotating elements are connected so as to be able to transmit a driving force, and the two rotating elements are connected so as to rotate integrally.
- the two rotating elements are used as a concept including a state in which a driving force can be transmitted via one or more transmission members.
- a transmission member include various members that transmit rotation at the same speed or a variable speed, and include, for example, a shaft, a gear mechanism, a belt, a chain, and the like.
- driving force is used synonymously with “torque”.
- engagement pressure represents a pressure that presses one engagement member and the other engagement member of the friction engagement device against each other.
- Release pressure represents a pressure at which the friction engagement device is constantly released.
- Release boundary pressure represents a pressure (release side slip boundary pressure) at which the friction engagement device enters a slip boundary state between the released state and the slip engaged state.
- the “engagement boundary pressure” represents a pressure at which the friction engagement device enters a slip boundary state between the slip engagement state and the direct engagement state (engagement side slip boundary pressure).
- Complete engagement pressure represents a pressure at which the friction engagement device is constantly in a direct engagement state.
- the drive device 1 is configured as a drive device for a so-called 1-motor parallel type hybrid vehicle.
- the driving apparatus 1 includes a rotating electrical machine 12 on a power transmission path that connects an input shaft I that is drivingly connected to the internal combustion engine 11 and an output shaft O that is drivingly connected to the wheels 15.
- a speed change mechanism 13 is provided between the rotating electrical machine 12 and the output shaft O.
- a first clutch CL1 is provided between the input shaft I and the rotating electrical machine 12.
- the transmission mechanism 13 is provided with a second clutch CL2 for shifting different from the first clutch CL1, as will be described later.
- the drive device 1 is arranged on the power transmission path connecting the input shaft I and the output shaft O in order from the internal combustion engine 11 and the input shaft I side, the first clutch CL1, the rotating electrical machine 12, and the second clutch CL2. It is equipped with.
- Each of these components is housed in a drive device case (not shown).
- the internal combustion engine 11 is a prime mover that is driven by combustion of fuel inside the engine to extract power.
- the internal combustion engine 11 for example, a gasoline engine or a diesel engine can be used.
- the internal combustion engine 11 is drivingly connected so as to rotate integrally with the input shaft I.
- an output shaft such as a crankshaft of the internal combustion engine 11 is drivingly connected to the input shaft I.
- the internal combustion engine 11 is drivingly connected to the rotating electrical machine 12 via the first clutch CL1.
- the 1st clutch CL1 is provided so that the drive connection between the internal combustion engine 11 and the rotary electric machine 12 can be cancelled
- the first clutch CL1 is a clutch that selectively drives and connects the input shaft I, the intermediate shaft M, and the output shaft O, and functions as an internal combustion engine disconnecting clutch.
- a wet multi-plate clutch, a dry single-plate clutch, or the like can be used as the first clutch CL1.
- the first clutch CL1 corresponds to the “first friction engagement device” in the present invention.
- the rotating electrical machine 12 includes a rotor and a stator (not shown), and functions as a motor (electric motor) that generates power by receiving power supply and generates power by receiving power supply. It is possible to fulfill the function as a generator (generator).
- the rotor of the rotating electrical machine 12 is drivingly connected so as to rotate integrally with the intermediate shaft M.
- the rotating electrical machine 12 is electrically connected to the power storage device 28 via the inverter device 27.
- As the power storage device 28, a battery, a capacitor, or the like can be used.
- the rotating electrical machine 12 receives power from the power storage device 28 and performs powering, or supplies the power storage device 28 with power generated by the torque output from the internal combustion engine 11 or the inertial force of the vehicle 6 to store the power.
- the intermediate shaft M is drivingly connected to the speed change mechanism 13. That is, the intermediate shaft M as an output shaft (rotor output shaft) of the rotor of the rotating electrical machine 12 is an input shaft (shift input shaft) of the speed change mechanism
- the speed change mechanism 13 is an automatic stepped speed change mechanism that can switch between a plurality of speed stages having different speed ratios.
- the transmission mechanism 13 engages or releases a gear mechanism such as a planetary gear mechanism and a rotating element of the gear mechanism in order to form the plurality of gear speeds, and includes a clutch and a brake for switching the gear speed.
- the speed change mechanism 13 includes a second clutch CL2 as one of a plurality of friction engagement devices for speed change.
- the second clutch CL2 is configured as a wet multi-plate clutch.
- the second clutch CL2 selectively connects the intermediate shaft M and the transmission intermediate shaft S provided in the transmission mechanism 13 in a driving manner.
- the second clutch CL2 corresponds to the “second friction engagement device” in the present invention.
- the transmission intermediate shaft S is drivingly connected to the output shaft O via another clutch or the like in the transmission mechanism 13 or a shaft member.
- the speed change mechanism 13 shifts the rotational speed of the intermediate shaft M and converts the torque based on a predetermined speed ratio set for each speed stage formed according to the engagement state of a plurality of clutches and the like. It is transmitted to the output shaft O. Torque transmitted from the speed change mechanism 13 to the output shaft O is distributed and transmitted to the left and right wheels 15 via the output differential gear unit 14. As a result, the drive device 1 can cause the vehicle 6 to travel by transmitting the torque of one or both of the internal combustion engine 11 and the rotating electrical machine 12 to the wheels 15.
- the driving device 1 includes an oil pump (not shown) that is drivingly connected to the intermediate shaft M.
- the oil pump functions as a hydraulic pressure source for supplying oil to each part of the driving device 1.
- the oil pump is driven by the driving force of one or both of the rotating electrical machine 12 and the internal combustion engine 11 to generate hydraulic pressure.
- the oil from the oil pump is adjusted to a predetermined oil pressure by the oil pressure control device 25 and then supplied to the first clutch CL1, the second clutch CL2, and the like.
- an oil pump having a dedicated drive motor may be provided.
- each part of the vehicle 6 on which the drive device 1 is mounted is provided with a plurality of sensors Se1 to Se5.
- the input shaft rotational speed sensor Se1 is a sensor that detects the rotational speed of the input shaft I.
- the rotational speed of the input shaft I detected by the input shaft rotational speed sensor Se1 is equal to the rotational speed of the internal combustion engine 11.
- the intermediate shaft rotation speed sensor Se2 is a sensor that detects the rotation speed of the intermediate shaft M.
- the rotational speed of the intermediate shaft M detected by the intermediate shaft rotational speed sensor Se2 is equal to the rotational speed of the rotor of the rotating electrical machine 12.
- the output shaft rotation speed sensor Se3 is a sensor that detects the rotation speed of the output shaft O.
- the control device 4 can also derive the vehicle speed that is the traveling speed of the vehicle 6 based on the rotational speed of the output shaft O detected by the output shaft rotational speed sensor Se3.
- the accelerator opening detection sensor Se4 is a sensor that detects the accelerator opening by detecting the operation amount of the accelerator pedal 17.
- the charge state detection sensor Se5 is a sensor that detects an SOC (state-of-charge: charge state).
- the control device 4 can also derive the amount of power stored in the power storage device 28 based on the SOC detected by the charge state detection sensor Se5. Information indicating the detection results of these sensors Se1 to Se5 is output to the control device 4.
- control device 4 includes a drive device control unit 40.
- the drive device control unit 40 mainly controls the rotating electrical machine 12, the first clutch CL1, and the speed change mechanism 13.
- vehicle 6 includes an internal combustion engine control unit 30 that mainly controls the internal combustion engine 11, separately from the drive device control unit 40.
- the internal combustion engine control unit 30 and the drive unit control unit 40 are configured to be able to exchange information with each other.
- the functional units provided in the internal combustion engine control unit 30 and the drive device control unit 40 are also configured to exchange information with each other.
- the internal combustion engine control unit 30 and the drive device control unit 40 are configured to be able to acquire information on detection results obtained by the sensors Se1 to Se5.
- the internal combustion engine control unit 30 includes an internal combustion engine control unit 31.
- the internal combustion engine control unit 31 is a functional unit that controls the operation of the internal combustion engine 11.
- the internal combustion engine control unit 31 determines an output torque (internal combustion engine torque Te) of the internal combustion engine 11 and a target torque and a target rotational speed as control targets for the rotational speed, and operates the internal combustion engine 11 according to the control target.
- the internal combustion engine control unit 31 can switch between torque control and rotational speed control of the internal combustion engine 11 according to the traveling state of the vehicle 6.
- the torque control is a control in which a target torque is commanded to the internal combustion engine 11 and the internal combustion engine torque Te is matched (followed) with the target torque.
- the rotational speed control is a control for instructing a target rotational speed to the internal combustion engine 11 and determining an output torque so that the rotational speed of the internal combustion engine 11 coincides with the target rotational speed.
- the drive device control unit 40 includes a travel mode determination unit 41, a required torque determination unit 42, a rotating electrical machine control unit 43, a first clutch operation control unit 44, a transmission mechanism operation control unit 45, a start control unit 46, and a hydraulic pressure adjustment control unit. 47 is provided.
- the traveling mode determination unit 41 is a functional unit that determines the traveling mode of the vehicle 6.
- the travel mode determination unit 41 is based on, for example, the vehicle speed derived based on the detection result of the output shaft rotation speed sensor Se3, the accelerator opening detected by the accelerator opening detection sensor Se4, or the detection result of the charging state detection sensor Se5.
- the driving mode to be realized by the drive device 1 is determined based on the amount of power stored in the power storage device 28 derived in this way.
- the travel mode determination unit 41 refers to a mode selection map (not shown) stored and provided in a recording device such as a memory.
- the travel modes that can be selected by the travel mode determination unit 41 include an electric travel mode, a parallel travel mode, and a slip travel mode (including a first slip travel mode and a second slip travel mode).
- the electric travel mode the first clutch CL1 is in the released state, and the driving force is transmitted between the rotating electrical machine 12 and the wheels 15, and the vehicle 6 is generated only by the output torque (the rotating electrical machine torque Tm) of the rotating electrical machine 12.
- the parallel travel mode both the first clutch CL1 and the second clutch CL2 are in a direct engagement state, and a driving force is transmitted between the internal combustion engine 11 and the wheels 15, and at least the vehicle is driven by the internal combustion engine torque Te. 6 is run.
- the vehicle 6 In the slip travel mode, the vehicle 6 is traveled in a state where the second clutch CL2 is in the slip engagement state and at least the internal combustion engine torque Te is transmitted to the wheels 15. At this time, the first clutch CL1 is in the slip engagement state in the first slip travel mode, and is in the direct engagement state in the second slip travel mode.
- the rotating electrical machine 12 In the parallel traveling mode and the slip traveling mode, the rotating electrical machine 12 outputs a positive rotating electrical machine torque Tm (> 0) as needed to assist the driving force by the internal combustion engine torque Te, or the negative rotating electrical machine torque Tm. ( ⁇ 0) is output to generate electric power using the internal combustion engine torque Te. Note that the modes described here are merely examples, and a configuration including various modes other than these can be employed.
- the required torque determination unit 42 is a functional unit that determines the vehicle required torque Td that is required to drive the vehicle 6.
- the required torque determination unit 42 is a predetermined map (not shown) based on the vehicle speed derived based on the detection result of the output shaft rotational speed sensor Se3 and the accelerator opening detected by the accelerator opening detection sensor Se4. ) To determine the vehicle required torque Td.
- the vehicle required torque Td corresponds to the “required driving force” in the present invention.
- the determined vehicle required torque Td is output to the internal combustion engine control unit 31, the rotating electrical machine control unit 43, the hydraulic pressure adjustment control unit 47, and the like.
- the rotating electrical machine control unit 43 is a functional unit that controls the operation of the rotating electrical machine 12.
- the rotating electrical machine control unit 43 determines a target torque and a target rotational speed as control targets for the rotating electrical machine torque Tm and the rotational speed, and operates the rotating electrical machine 12 according to the control target.
- the rotating electrical machine control unit 43 can switch between torque control and rotational speed control of the rotating electrical machine 12 according to the traveling state of the vehicle 6.
- the rotating electrical machine control unit 43 includes a target torque determination unit 43a and a rotation speed control unit 43b so that such torque control and rotation speed control can be executed.
- the target torque determining unit 43a is a functional unit that determines the target torque Tmf of the rotating electrical machine 12. Then, the rotating electrical machine control unit 43 instructs the rotating electrical machine 12 with the target torque Tmf determined by the target torque determining unit 43a, and feeds the rotating electrical machine 12 in a feed-forward manner so as to match the rotating electrical machine torque Tm with the target torque Tmf. Torque control can be executed.
- the rotational speed control unit 43b is a functional unit that performs a rotational speed control that commands the rotating electrical machine 12 for a target rotational speed Nmt and determines an output torque so that the rotational speed of the rotating electrical machine 12 matches the target rotational speed Nmt. is there.
- rotational speed control of the rotating electrical machine 12 corresponds to “rotational speed feedback control” and “rotational state control” in the present invention.
- the rotating electrical machine control unit 43 cooperates with the target torque determining unit 43a and the rotational speed control unit 43b to control the rotating electrical machine torque Tm in a feedforward manner and feed back the rotational speed of the rotating electrical machine 12 in a feedback manner. It is also possible to control it.
- the first clutch operation control unit 44 is a functional unit that controls the operation of the first clutch CL1.
- the first clutch operation control unit 44 controls the hydraulic pressure supplied to the first clutch CL1 via the hydraulic control device 25, and controls the engagement pressure of the first clutch CL1, thereby operating the first clutch CL1.
- the first clutch operation control unit 44 outputs a hydraulic pressure command value for the first clutch CL1, and sets the hydraulic pressure supplied to the first clutch CL1 via the hydraulic control device 25 to be less than the release boundary pressure.
- the clutch CL1 is released.
- the first clutch operation control unit 44 sets the first clutch CL1 in the direct engagement state by setting the supply hydraulic pressure to the first clutch CL1 to be equal to or higher than the engagement boundary pressure via the hydraulic control device 25.
- first clutch operation control unit 44 sets the hydraulic pressure supplied to the first clutch CL1 via the hydraulic pressure control device 25 to a slip engagement pressure that is greater than or equal to the release boundary pressure and less than the engagement boundary pressure, whereby the first clutch CL1 is set to the slip engagement state.
- the driving force is transmitted between the input shaft I and the intermediate shaft M in a relative rotation state.
- the magnitude of torque that can be transmitted in the direct engagement state or slip engagement state of the first clutch CL1 is determined according to the engagement pressure of the first clutch CL1 at that time.
- the magnitude of the torque at this time is defined as “transmission torque capacity Tc1” of the first clutch CL1.
- the first clutch operation control unit 44 continuously controls the amount of oil supplied to the first clutch CL1 and the magnitude of the supplied oil pressure with a proportional solenoid or the like according to the oil pressure command value for the first clutch CL1.
- increase / decrease of the engagement pressure and the transmission torque capacity Tc1 can be controlled continuously.
- the transmission direction of torque transmitted through the first clutch CL1 in the slip engagement state of the first clutch CL1 is determined according to the direction of relative rotation between the input shaft I and the intermediate shaft M. That is, when the rotational speed of the input shaft I is higher than the rotational speed of the intermediate shaft M, torque is transmitted from the input shaft I side to the intermediate shaft M side via the first clutch CL1, and the rotational speed of the input shaft I is increased. Is lower than the rotational speed of the intermediate shaft M, torque is transmitted from the intermediate shaft M side to the input shaft I side via the first clutch CL1.
- the first clutch operation control unit 44 can switch between the torque capacity control and the rotation speed control of the first clutch CL1 according to the traveling state of the vehicle 6.
- the torque capacity control is a control for making the transmission torque capacity Tc1 of the first clutch CL1 coincide with a predetermined target transmission torque capacity.
- the rotation speed control is performed by rotating the rotation member connected to one engagement member of the first clutch CL1 (in this example, the input shaft I) and the rotation member connected to the other engagement member (in this example, Control for determining the hydraulic pressure command value to the first clutch CL1 or the target transmission torque capacity of the first clutch CL1 so that the rotational speed difference from the rotational speed of the intermediate shaft M) matches the predetermined target differential rotational speed. It is.
- the rotational speed of the input shaft I is adjusted by matching the rotational speed difference with a predetermined target differential rotational speed in a state where the rotational speed of the intermediate shaft M is controlled to a predetermined value. It is possible to control to coincide with a predetermined target rotational speed.
- the transmission mechanism operation control unit 45 is a functional unit that controls the operation of the transmission mechanism 13.
- the transmission mechanism operation control unit 45 determines the target shift speed based on the accelerator opening and the vehicle speed, and controls the transmission mechanism 13 to form the determined target shift speed.
- the speed change mechanism operation control unit 45 refers to a speed change map (not shown) stored and stored in a recording device such as a memory.
- the shift map is a map in which a shift schedule based on the accelerator opening and the vehicle speed is set.
- the transmission mechanism operation control unit 45 controls the hydraulic pressure supplied to predetermined clutches and brakes provided in the transmission mechanism 13 based on the determined target shift stage to form the target shift stage.
- the speed change mechanism 13 is provided with the second clutch CL2 for speed change.
- the second clutch CL2 forms a first gear stage in cooperation with, for example, a predetermined brake provided in the speed change mechanism 13.
- the second clutch CL2 is naturally included in the control target of the transmission mechanism operation control unit 45.
- the function unit that controls the operation of the second clutch CL2 is particularly referred to as a second clutch operation control unit 45a.
- the second clutch operation control unit 45a controls the hydraulic pressure supplied to the second clutch CL2 via the hydraulic pressure control device 25, and controls the engagement pressure of the second clutch CL2, thereby engaging the second clutch CL2. Control the status.
- the basic control and the operation control of the first clutch CL1 by the first clutch operation control unit 44 are basically different except that the control target and the matters accompanying it are partially different. Is the same.
- the start control unit 46 is a functional unit that executes internal combustion engine start control.
- the start control unit 46 executes the internal combustion engine start control when, for example, the internal combustion engine start condition is satisfied during travel in the electric travel mode.
- the internal combustion engine start condition is a condition for starting the internal combustion engine 11 in a stopped state, and is established when the vehicle 6 enters a situation that requires the torque of the internal combustion engine 11. For example, when the driver strongly depresses the accelerator pedal 17 during traveling in the electric traveling mode, the internal combustion engine is started when a torque corresponding to the vehicle required torque Td cannot be obtained with only the rotating electrical machine torque Tm. The condition is met.
- the start control unit 46 increases the rotational speed of the input shaft I by the torque of the rotating electrical machine 12 and starts the internal combustion engine 11 in a stopped state. At that time, the start controller 46 changes the first clutch CL1 from the disengaged state to the slip engagement state and finally to the direct engagement state.
- the rotation speed control unit 43b executes the rotation speed control, and feedback-controls the rotation speed of the rotating electrical machine 12 so as to match the determined target rotation speed Nmt.
- the start control unit 46 raises the engagement pressure and the transmission torque capacity Tc1 of the first clutch CL1 to a predetermined value via the first clutch operation control unit 44, whereby the first clutch The rotational speed of the input shaft I and the internal combustion engine 11 is increased by the torque of the rotating electrical machine 12 transmitted via CL1. Since the load torque resulting from the moment of inertia acts on the internal combustion engine 11 in the stopped state, the load on the rotating electrical machine 12 increases as the engagement pressure of the first clutch CL1 and the transmission torque capacity Tc1 rise.
- the rotational speed control unit 43b executes the rotational speed control, the rotating electrical machine torque Tm in the positive direction against the load torque of the internal combustion engine 11 is set to the maximum torque that the rotating electrical machine 12 can output.
- the rotational speed of the input shaft I and the internal combustion engine 11 is increased while achieving the target rotational speed Nmt by outputting within the range.
- a torque (inner torque) for changing the rotational speed of the rotating electrical machine 12 toward the target rotational speed Nmt In the present application, it is referred to as “rotational change torque Tmi”.
- the internal combustion engine control unit 31 determines that the internal combustion engine 11 can be ignited, and The internal combustion engine 11 is started via the control unit 31.
- the ignition rotation speed Nf is set to a rotation speed at which the internal combustion engine 11 can be ignited and started (for example, a rotation speed during idling).
- the internal combustion engine control unit 31 controls the torque of the internal combustion engine 11, and the first clutch operation control unit 44 is in a state where the internal combustion engine 11 and the rotating electrical machine 12 are in a direct engagement state in synchronization. Torque control is performed on the first clutch CL1 in the slip engagement state.
- the rotation speed control unit 43b controls the rotation speed of the rotating electrical machine 12 as described above, and the second clutch operation control unit 45a basically controls the torque capacity of the second clutch CL2.
- the second clutch CL2 is subject to hydraulic pressure adjustment control by the hydraulic pressure adjustment control unit 47 after the first clutch CL1 is in the direct engagement state.
- the internal combustion engine control unit 31 sets a value obtained by subtracting the target torque of the rotating electrical machine 12 from the vehicle required torque Td as the target torque after starting, so that the internal combustion engine torque Te matches the target torque.
- the internal combustion engine 11 is torque controlled.
- the internal combustion engine control unit 31 sets an added value of the vehicle required torque Td and a torque necessary for power generation (power generation torque) as a target torque after starting, and the internal combustion engine The internal combustion engine 11 is torque controlled so that the torque Te matches the target torque.
- the first clutch operation control unit 44 sets the torque for increasing the rotational speed of the internal combustion engine 11 to the target transmission torque capacity before the ignition of the internal combustion engine 11, and the transmission torque capacity Tc1 of the first clutch CL1 is the target torque capacity.
- the torque capacity of the first clutch CL1 is controlled so as to match the transmission torque capacity.
- the first clutch operation control unit 44 sets the target torque of the internal combustion engine 11 to the target transmission torque capacity in the slip engagement state of the first clutch CL1, and the transmission torque capacity of the first clutch CL1.
- Torque capacity control of the first clutch CL1 is performed so that Tc1 matches the target transmission torque capacity.
- the first clutch CL1 is in the direct engagement state (for example, during hydraulic pressure adjustment control), the internal combustion engine torque Te is transmitted to the rotating electrical machine 12 side as it is.
- the second clutch operation control unit 45a basically sets the torque corresponding to the vehicle required torque Td as the target transmission torque capacity in the slip engagement state of the second clutch CL2, and the transmission torque capacity Tc2 of the second clutch CL2 is
- the second clutch CL2 is subjected to torque capacity control so as to match the target transmission torque capacity. Note that after the second clutch CL2 is in the direct engagement state, the rotational speed of the rotating electrical machine 12 is uniquely determined according to the rotational speed of the wheel 15, and the rotational speed control can no longer be maintained.
- the rotating electrical machine control unit 43 controls the torque of the rotating electrical machine 12 to output the target torque Tmf determined by the target torque determining unit 43a.
- the second clutch CL2 is basically brought into the slip engagement state, and the second clutch operation control unit 45a sets the transmission torque capacity Tc2 to the vehicle required torque Td. It is controlled so as to have a corresponding torque.
- Td transmission torque capacity
- the second clutch CL2 is shifted from the slip engagement state to the direct engagement state.
- the target torque Tmf of the rotating electrical machine 12 during the internal combustion engine start control is a value obtained by subtracting the target torque of the internal combustion engine 11 from the vehicle required torque Td.
- the target torque Tmf of the rotating electrical machine 12 is maintained even after the internal combustion engine start control is finished.
- each control as described above is executed accurately during the internal combustion engine start control, as shown in FIG. 2A, it is transmitted to the rotating electrical machine 12 via the input shaft I and the first clutch CL1.
- the torque completely matches the target torque of the internal combustion engine 11 (here, “Te0”), and the torque transmitted to the output shaft O via the second clutch CL2 in the slip engagement state is the vehicle request It completely corresponds to the torque Td (here, this is referred to as “Td0”).
- the target torque Tmf of the rotating electrical machine 12 during the rotational speed control of the rotating electrical machine 12 associated with the internal combustion engine start control (here, this is referred to as “Tm0”) is the target torque Te0 of the internal combustion engine 11 from the vehicle required torque Td0.
- the present embodiment employs a configuration including a hydraulic pressure adjustment control unit 47 that executes hydraulic pressure adjustment control in parallel with the internal combustion engine start control.
- a hydraulic pressure adjustment control unit 47 that executes hydraulic pressure adjustment control in parallel with the internal combustion engine start control.
- this hydraulic pressure adjustment control is a state in which driving force is transmitted between the rotating electrical machine 12 and the wheel 15 in the disengaged state of the first clutch CL1 and the engaged state of the second clutch CL2 (electric travel mode). ) To the state where the driving force is transmitted between the internal combustion engine 11 and the wheels 15 (the parallel travel mode via the slip travel mode) with the first clutch CL1 engaged. More specifically, the hydraulic pressure adjustment control is performed during the transition of the second clutch CL2 from the slip engagement state to the direct engagement state after the first clutch CL1 is in the direct engagement state during the internal combustion engine start control. Executed.
- the hydraulic pressure adjustment control is performed after the first clutch CL1 that is in the slip engagement state during the internal combustion engine start control is in the direct engagement state and then the second clutch CL2 is in the direct engagement state from the slip engagement state. It is continuously executed until it moves to. In a period in which the hydraulic pressure adjustment control is being executed, the internal combustion engine torque Te is transmitted to the wheels 15 via the first clutch CL1 in the direct engagement state and the second clutch CL2 in the slip engagement state. It has become.
- FIG. 3 is a block diagram showing configurations of the rotating electrical machine control unit 43 (including the target torque determination unit 43a and the rotation speed control unit 43b) and the hydraulic pressure adjustment control unit 47.
- the target torque determining unit 43a receives the internal combustion engine torque command Ce and the vehicle request torque Td.
- the internal combustion engine torque command Ce is a target torque command value in the torque control of the internal combustion engine 11, and is determined by the internal combustion engine control unit 31.
- the required vehicle torque Td is determined by the required torque determination unit 42.
- the target torque determination unit 43 a includes a target torque calculator 51.
- the target torque calculator 51 performs a calculation for subtracting the internal combustion engine torque command Ce from the vehicle request torque Td, and outputs a subtraction value (Td ⁇ Ce) as the calculation result as the target torque Tmf.
- the target torque determination unit 43a is based on the difference between the vehicle request torque Td for driving the wheels 15 and the internal combustion engine torque command Ce that is a command value of torque transmitted to the rotary electric machine 12 via the input shaft I.
- the target torque Tmf of the rotating electrical machine 12 is determined.
- the target torque Tmf calculated in this way is a feedforward torque command determined in a feedforward manner.
- the target rotational speed Nmt and the actual rotational speed Nmr of the rotating electrical machine 12 are input to the rotational speed control unit 43b.
- the target rotational speed Nmt is a value that can crank the internal combustion engine 11 in the stopped state, and the output shaft O when it is assumed that the first speed stage is formed in the transmission mechanism 13. Is set in advance so as to be higher than the rotation speed of the intermediate shaft M according to the rotation speed (see FIG. 4).
- the actual rotational speed Nmr of the rotating electrical machine 12 is detected by the intermediate shaft rotational speed sensor Se2.
- the target rotational speed Nmt and the actual rotational speed Nmr are input to the subtractor 61, and the difference (Nmr ⁇ Nmt) between the actual rotational speed Nmr and the target rotational speed Nmt is output as the rotational speed deviation ⁇ Nm.
- the rotational speed deviation ⁇ Nm is input to the correction torque calculator 52.
- the correction torque calculator 52 calculates and outputs a correction torque Tmb that makes the rotation speed deviation ⁇ Nm zero based on the input rotation speed deviation ⁇ Nm.
- the correction torque calculator 52 can be configured to perform calculation by appropriately combining at least one of known proportional control, integral control, and differential control.
- the correction torque calculator 52 is configured to perform proportional integral control (PI control) calculation.
- the correction torque calculator 52 outputs the calculation result as a correction torque Tmb for the target torque Tmf.
- the correction torque Tmb calculated in this way is a feedback torque command determined in a feedback manner.
- the target torque Tmf calculated by the target torque calculator 51 and the correction torque Tmb calculated by the correction torque calculator 52 are input to the adder 62, and an added value (Tmf + Tmb) of the target torque Tmf and the correction torque Tmb is obtained.
- the rotating electrical machine control unit 43 outputs the rotating electrical machine torque command Cm.
- the rotating electrical machine control unit 43 controls the operation of the rotating electrical machine 12 based on the rotating electrical machine torque command Cm.
- At least the vehicle required torque Td is input to the hydraulic pressure adjustment control unit 47.
- the hydraulic pressure adjustment control unit 47 includes a target torque capacity calculator 53.
- the target torque capacity calculator 53 calculates and outputs a target torque capacity Tcf corresponding to the vehicle request torque Td based on the input vehicle request torque Td.
- the target torque capacity Tcf calculated in this way is a feedforward torque capacity command determined in a feedforward manner.
- Such a target torque capacity Tcf is output as it is as the second clutch torque capacity command Cc2, and the configuration in which the operation of the second clutch CL2 is controlled based on the second clutch torque capacity command Cc2 is a premise in the present invention.
- the structure is well known in the art.
- the hydraulic pressure adjustment controller 47 further receives the correction torque Tmb calculated by the correction torque calculator 52 and the actual rotational speed Nmr of the rotating electrical machine 12 detected by the intermediate shaft rotational speed sensor Se2.
- the hydraulic pressure adjustment control unit 47 includes a rotation change torque calculator 54, a torque capacity correction amount calculator 55, and a hydraulic pressure command generator 56.
- the rotation change torque calculator 54 calculates the rotation change torque Tmi of the rotor of the rotating electrical machine 12 based on the inputted actual rotation speed Nmr.
- the rotation change torque Tmi is a torque (inner torque) for changing the actual rotation speed Nmr toward the target rotation speed Nmt when the rotation speed of the rotating electrical machine 12 is controlled.
- the rotation change torque calculator 54 multiplies the rotor inertia Jm of the rotating electrical machine 12 by the time derivative of the actual rotation speed Nmr and outputs the multiplication value (Jm ⁇ (dNmr / dt)) as the rotation change torque Tmi.
- the correction torque Tmb calculated by the correction torque calculator 52 and the rotation change torque Tmi calculated by the rotation change torque calculator 54 are input to the subtractor 63, and a difference (Tmb ⁇ ) between the correction torque Tmb and the rotation change torque Tmi. Tmi) is output as the torque error ⁇ T.
- This torque error ⁇ T is caused by the error of the internal combustion engine torque Te actually output by the internal combustion engine 11, and can be said to be “a correction torque Tmb calculated by excluding the portion corresponding to the rotational change torque Tmi”.
- the rotation change torque Tmi is zero, and the torque error ⁇ T matches the correction torque Tmb.
- This torque error ⁇ T is input to the torque capacity correction amount calculator 55.
- the torque capacity correction amount calculator 55 calculates a torque capacity correction amount Tcb based on the input torque error ⁇ T. In the present embodiment, the torque capacity correction amount calculator 55 calculates and outputs a torque capacity correction amount Tcb that brings the torque error ⁇ T close to zero.
- the torque capacity correction amount calculator 55 can be configured to perform a calculation by appropriately combining at least one of known proportional control, integral control, and differential control. In this embodiment, the torque capacity correction amount calculator 55 is configured to perform integral control (I control) calculation. That is, the torque capacity correction amount calculator 55 calculates the torque capacity correction amount Tcb based on the calculated value obtained by integrating the torque error ⁇ T over time.
- the torque capacity correction amount calculator 55 outputs the calculation result as a torque capacity correction amount Tcb for the target torque capacity Tcf.
- the torque capacity correction amount Tcb calculated in this way is a feedback torque capacity command determined in a feedback manner.
- the target torque capacity Tcf calculated by the target torque capacity calculator 53 and the torque capacity correction amount Tcb calculated by the torque capacity correction amount calculator 55 are input to the subtractor 64, and the torque capacity correction amount Tcb is calculated from the target torque capacity Tcf.
- a subtraction value (Tcf ⁇ Tcb) obtained by subtracting is calculated as the second clutch torque capacity command Cc2.
- the hydraulic pressure command generator 56 generates a second clutch hydraulic pressure command Pc2, which is a command value of the hydraulic pressure supplied to the second clutch CL2, based on the calculated second clutch torque capacity command Cc2.
- the generated second clutch hydraulic pressure command Pc2 is output from the hydraulic pressure adjustment control unit 47 to the hydraulic pressure control device 25.
- the hydraulic control device 25 supplies the hydraulic pressure corresponding to the second clutch hydraulic pressure command Pc2 to the second clutch C2.
- the rotational speed control of the rotating electrical machine 12 is executed in the slip engagement state of the second clutch CL2, and after the transition to the direct engagement state of the first clutch CL1, Based on the torque error ⁇ T (including the correction torque Tmb) during the rotational speed control of the rotating electrical machine 12 by the hydraulic pressure adjustment control that is continuously executed during the transition from the slip engagement state to the direct engagement state.
- the hydraulic pressure supplied to the two clutch CL2 is controlled.
- the hydraulic pressure adjustment control unit 47 is provided with a torque capacity correction amount calculator 55, and the hydraulic pressure adjustment control unit 47 is used when the second clutch CL2 in the slip engagement state shifts to the direct engagement state.
- a torque capacity correction amount Tcb is determined so that the torque error ⁇ T in the rotational speed control of the rotating electrical machine 12 is zero.
- the hydraulic adjustment control unit 47 subtracts the determined torque capacity correction amount Tcb from the target torque capacity Tcf calculated by the target torque capacity calculator 53 that is also provided in the hydraulic pressure adjustment control unit 47.
- the hydraulic pressure adjustment control unit 47 generates a second clutch hydraulic pressure command Pc2 based on the second clutch torque capacity command Cc2, and controls the transmission torque capacity Tc2 of the second clutch CL2 based on the second clutch hydraulic pressure command Pc2. .
- the torque error ⁇ T (correction torque Tmb) caused by the error can be reduced.
- the torque error ⁇ T (correction torque Tmb) can be made sufficiently close to zero at the time when the second clutch CL2 shifts from the slip engagement state to the direct engagement state. Therefore, when the internal combustion engine 11 in the stopped state is started, it is possible to suppress the occurrence of a torque step when the second clutch CL2 shifts from the slip engagement state to the direct engagement state. Therefore, it can be avoided as much as possible that the passenger of the vehicle 6 feels a shock.
- the hydraulic pressure adjustment control unit 47 includes a rotation change torque calculator 54 and a subtractor 63.
- the hydraulic pressure adjustment control unit 47 changes the actual rotation speed Nmr of the rotating electrical machine 12 toward the target rotation speed Nmt.
- the hydraulic pressure adjustment control is executed based on the correction torque Tmb calculated by excluding the amount corresponding to the rotation change torque Tmi (that is, the torque error ⁇ T described above).
- the second clutch torque capacity command Cc2 and the second clutch hydraulic pressure command Pc2 corresponding to the second clutch torque capacity command Cc2 are appropriately set in consideration of a steady error due to the error of the internal combustion engine torque Te. This can be determined, and the occurrence of a torque step can be effectively suppressed.
- the internal combustion engine 11 During traveling in the electric traveling mode, the internal combustion engine 11 is in a stopped state because fuel injection is stopped.
- the first clutch CL1 is in a released state. In this state, the rotary electric machine 12 is torque controlled so as to output a torque corresponding to the vehicle required torque Td.
- a series of internal combustion engine start control is started.
- the second clutch operation control unit 45a gradually decreases the hydraulic pressure supplied to the second clutch CL2 from time T01.
- the differential rotational speed between the two engaging members engaged by the second clutch CL2 at time T02 (in this example, equal to the differential rotational speed between the intermediate shaft M and the transmission intermediate shaft S) is a predetermined slip determination threshold value.
- the second clutch operation control unit 45a determines that the second clutch CL2 has changed from the direct engagement state to the slip engagement state. After determining the transition of the second clutch CL2 to the slip engagement state, the first clutch operation control unit 44 starts the torque capacity control of the first clutch CL1, and the second clutch operation control unit 45a detects the torque of the second clutch CL2. Start capacity control. Further, the rotation speed control unit 43 b starts the rotation speed control of the rotating electrical machine 12. In the rotational speed control of the rotating electrical machine 12, the rotational speed of the rotating electrical machine 12 is controlled to coincide with the target rotational speed Nmt.
- the internal combustion engine control unit 31 ignites the internal combustion engine 11 to start the internal combustion engine 11.
- the rotational speed of the internal combustion engine 11 further increases and eventually the internal combustion engine 11 and the rotating electrical machine 12 are synchronized at time T04 and the first clutch CL1 is in the direct engagement state, traveling in the second slip traveling mode is started.
- the hydraulic pressure adjustment control of the second clutch CL2 by the hydraulic pressure adjustment control unit 47 unique to the present application is started.
- the internal combustion engine control unit 31 starts torque control of the internal combustion engine 11.
- FIG. 4 shows the correction torque Tmb for the target torque Tmf of the rotating electrical machine 12 during a period from a predetermined time after time T04 to time T05 when the second clutch CL2 shifts from the slip engagement state to the direct engagement state. It is shown that the torque capacity correction amount Tcb with respect to the target torque capacity Tcf of the second clutch CL2 is appropriately increased or decreased so as to gradually decrease toward zero.
- the transmission torque capacity Tc2 of the second clutch CL2 is increased to some extent, the rotational speed of the rotating electrical machine 12 starts to be lowered according to the rotational speed of the wheels 15.
- the second clutch operation control unit 45a determines that the second clutch CL2 has changed from the slip engagement state to the direct engagement state. After determining the shift to the direct engagement state of the second clutch CL2, the rotational speed control unit 43b ends the rotational speed control of the rotating electrical machine 12, and the rotating electrical machine control unit 43 sets the target torque Tmf determined by the target torque determining unit 43a. Thus, torque control of the rotating electrical machine 12 is started. Further, the second clutch operation control unit 45a gradually increases the hydraulic pressure supplied to the second clutch CL2 from time T05, and stepwise increases to the full engagement pressure at time T06 after a predetermined time has elapsed. The internal combustion engine start control is thus completed, and traveling in the parallel traveling mode is started.
- the second clutch CL2 is controlled in the internal combustion engine start control. It is possible to suppress the occurrence of a torque step when shifting from the slip engagement state to the direct engagement state. Therefore, it is possible to avoid as much as possible that the passenger of the vehicle 6 feels a shock.
- the start control unit 46 increases the rotation speed of the input shaft I by the torque of the rotating electrical machine 12 transmitted via the first clutch CL1 in the slip engagement state in the internal combustion engine start control.
- the case where the internal combustion engine control unit 31 starts the internal combustion engine 11 in a stopped state by igniting the internal combustion engine has been described as an example.
- the embodiment of the present invention is not limited to this. That is, for example, the drive device 1 to be controlled by the control device 4 is configured to include a dedicated starter motor for starting the internal combustion engine 11 separately from the rotating electrical machine 12, and the start control unit 46 controls the internal combustion engine start control. It is also a preferred embodiment of the present invention that the internal combustion engine 11 is started using the torque of the starting motor.
- FIG. 5 shows a time chart for executing the internal combustion engine start control and the hydraulic pressure adjustment control in this case.
- the first clutch CL1 is maintained in the released state after time T12 when the differential rotation speed between the two engaging members engaged by the second clutch CL2 is equal to or higher than the slip determination threshold Th1.
- the torque capacity control is not executed.
- the internal combustion engine 11 is started by the torque of the starter motor.
- the rotational speed of the internal combustion engine 11 increases and eventually the internal combustion engine 11 and the rotating electrical machine 12 are synchronized at time T13, the first clutch CL1 is immediately brought into a direct engagement state.
- the hydraulic pressure adjustment control is executed before the first clutch CL1 is in the direct engagement state during the internal combustion engine start control. That is, in this example, there is no period during which torque capacity control is performed while the first clutch CL1 is in the slip engagement state, so that the hydraulic pressure adjustment control is immediately started at time T12 when it is determined that the second clutch CL2 has started to slip. Yes. Even in this case, the hydraulic pressure adjustment control is still executed after the first clutch CL1 is shifted to the direct engagement state. The contents and effects of the hydraulic pressure adjustment control are the same as in the above embodiment.
- the vehicle 6 is traveling on a road with a downward slope in the electric travel mode with the accelerator off.
- the vehicle speed is high to some extent and is equal to or higher than a predetermined speed (in this example, the rotational speed of the intermediate shaft M as the speed change input shaft determined according to the vehicle speed can output the rotating electrical machine torque Tm necessary for starting the internal combustion engine 11.
- the internal combustion engine start control is executed in a state of a vehicle speed that exceeds the upper limit rotation speed of the rotating electrical machine 12.
- the rotating electrical machine torque Tm is limited to a predetermined value or less according to the rotational speed of the rotating electrical machine 12 (intermediate shaft M).
- the hydraulic pressure adjustment control unit 47 starts the hydraulic pressure adjustment control at the same time as the internal combustion engine 11 and the rotating electrical machine 12 are synchronized and the first clutch CL1 is in the direct engagement state, and then the second The case where the hydraulic pressure adjustment control is continuously executed until the clutch CL2 shifts from the slip engagement state to the direct engagement state has been described as an example.
- the embodiment of the present invention is not limited to this.
- the hydraulic pressure adjustment control unit 47 executes the hydraulic pressure adjustment control at least when the second clutch CL2 transitions from the slip engagement state to the direct engagement state.
- a configuration in which the hydraulic pressure adjustment control is executed in a predetermined period is also a preferred embodiment of the present invention.
- the hydraulic adjustment control unit 47 may be configured to start the hydraulic adjustment control after a predetermined time has elapsed with reference to the time point when the first clutch CL1 is in the direct engagement state.
- the hydraulic pressure adjustment control is executed before the first clutch CL1 is in the direct engagement state.
- the hydraulic pressure adjustment control unit 47 executes the hydraulic pressure adjustment control based on the corrected torque Tmb (torque error ⁇ T) calculated by excluding the portion corresponding to the rotation change torque Tmi will be described as an example. did.
- the embodiment of the present invention is not limited to this. That is, the hydraulic pressure adjustment control unit 47 may be configured to execute the hydraulic pressure adjustment control using the correction torque Tmb calculated by the correction torque calculator 52 without removing the portion corresponding to the rotational change torque Tmi. This is one of the preferred embodiments.
- the hydraulic pressure adjustment control unit 47 includes both the target torque capacity calculator 53 and the torque capacity correction amount calculator 55 so that the hydraulic pressure adjustment control can be executed with high follow-up performance.
- the case where the second clutch hydraulic pressure command Pc2 is generated according to the second clutch torque capacity command Cc2 determined based on the target torque capacity Tcf and the torque capacity correction amount Tcb has been described as an example.
- the embodiment of the present invention is not limited to this. That is, for example, the hydraulic pressure adjustment control unit 47 includes only the torque capacity correction amount calculator 55 without including the target torque capacity calculator 53, and uses the torque capacity correction amount Tcb calculated by the torque capacity correction amount calculator 55 as it is.
- a preferred embodiment of the present invention may be configured to determine the second clutch torque capacity command Cc2 and generate the second clutch hydraulic pressure command Pc2 in accordance with the second clutch torque capacity command Cc2 thus determined. one of. Even with such a configuration, the same effects as those of the above-described embodiment can be obtained.
- the torque error ⁇ T (correction torque Tmb) caused by the error of the actual internal combustion engine torque Te is changed at the time of shifting to the direct engagement state of the second clutch CL2 by hydraulic pressure adjustment control.
- Tmb correction torque
- the torque error ⁇ T may not be completely zero when the second clutch CL2 is shifted to the direct engagement state (see time T24 in FIG. 6). .
- the rotating electrical machine control unit 43 gradually changes the rotating electrical machine torque Tm from the torque (Tmf + Tmb) during the rotational speed control to the target torque Tmf in the torque control when shifting from the rotational speed control to the torque control. It is preferable that the transition torque control to be changed to be executed.
- the transition torque control (displayed as “transition control”) executed from time T24 to T25, the rotating electrical machine torque Tm gradually changes at a constant rate of time change and finally matches the target torque Tmf. The state of doing is shown.
- the rotating electrical machine torque Tm is reduced to the target torque Tmf even when the second clutch CL2 shifts to the direct engagement state with the torque error ⁇ T being not zero.
- the torque can be gradually changed to suppress the occurrence of a torque step.
- timing for igniting the internal combustion engine 11 is not limited to the time when the rotational speed of the internal combustion engine 11 reaches the ignition rotational speed Nf, for example, a predetermined timing after the first clutch CL1 is in the direct engagement state. This is also one of the preferred embodiments of the present invention.
- control device 4 (drive device control unit 40) includes a first determination unit 71 that determines a drive transmission state, a second determination unit 72 that determines a relative rotation state, and a specific situation. It is preferable to provide an adjustment prohibition control unit 73 that prohibits execution of hydraulic pressure adjustment control below.
- the first determination unit 71 defines the direction from the rotating electrical machine 12 toward the wheel 15 along the power transmission path as the positive drive transmission direction, and the driving force in the direction of rotating the wheel 15 in the forward direction of the vehicle 6 is positively driven.
- a state transmitted in the transmission direction is defined as a positive drive transmission state, and a drive transmission state (positive drive transmission state or negative drive transmission state) is determined.
- the driving force in the direction of accelerating the rotation of the wheel 15 is transmitted in the positive drive transmission direction.
- the one determination unit 71 determines this state as a positive drive transmission state.
- the driving force is transmitted in the direction opposite to the positive drive transmission direction (in other words, the positive drive
- the first determination unit 71 determines this state as a negative drive transmission state.
- the first determination unit 71 is configured to determine the drive transmission state (including positive and negative signs) based on the information of the vehicle required torque Td (including positive and negative signs) determined by the required torque determining part 42. can do.
- the second determination unit 72 determines that the rotation speed of the engagement member on the rotating electrical machine 12 side is higher than the rotation speed of the engagement member on the wheel 15 side.
- the state is defined as a relative rotation state (positive relative rotation state or negative relative rotation state).
- the second determination unit 72 uses the intermediate speed M connected to the engagement member on the wheel 15 side from the rotation speed of the intermediate shaft M connected to the engagement member on the rotating electrical machine 12 side in the second clutch CL2.
- the relative rotational speed (differential rotational speed) is calculated by subtracting the rotational speed of the shaft S (which can be calculated based on the rotational speed of the output shaft O), and the relative rotational state (including positive and negative signs) is calculated based on the calculation result. Determine.
- the second determination unit 72 determines a state where the relative rotational speed is zero or more as a positive relative rotational state, and determines a state where the relative rotational speed is less than zero as a negative relative rotational state. In consideration of control delay and the like, it is also preferable to provide hysteresis for the threshold value for determining the relative rotation state.
- the first determination unit 71 first acquires information on the vehicle request torque Td, and determines a drive transmission state (a positive drive transmission state or a negative drive transmission state) based on the information. (Step # 1).
- the second determination unit 72 acquires information on the rotational speed of the intermediate shaft M and the rotational speed of the output shaft O, and based on these, the relative rotational state (positive relative rotational state or negative relative rotational state) is obtained.
- Determine (# 2).
- the adjustment prohibition control unit 73 determines whether the positive / negative of the drive transmission state matches the positive / negative of the relative rotation state (# 3).
- FIG. 9 shows a time chart for executing the internal combustion engine start control and the hydraulic pressure adjustment control in this case.
- the internal combustion engine start condition is established by, for example, a shift operation by the driver of the vehicle 6, and the internal combustion engine start control is executed. Is assumed. The points not particularly specified are the same as those in the above embodiment.
- the running resistance negative driving force
- the second clutch CL2 that is brought into the slip engagement state during the execution of the internal combustion engine start control is rotated.
- a negative relative rotational state is established in which the rotational speed of the intermediate shaft M connected to the engagement member on the electric machine 12 side is lower than the rotational speed of the transmission intermediate shaft S connected to the engagement member on the wheel 15 side (time T32). ). Then, the hydraulic pressure adjustment control is executed after time T34 when the first clutch CL1 is in the direct engagement state in the negative drive transmission state and the negative relative rotation state.
- the vehicle required torque Td is changed from negative to positive, and the negative drive transmission state is shifted to the positive drive transmission state.
- a positive drive transmission state and a negative relative rotation state are established, the hydraulic pressure adjustment control is prohibited, and the hydraulic pressure command value to the second clutch CL2 is set to zero.
- the rotational speed of the intermediate shaft M is higher than the rotational speed of the transmission intermediate shaft S so that torque is transmitted from the rotating electrical machine 12 side to the wheel 15 side via the second clutch CL2 that is in the slip engagement state.
- the target rotational speed of the rotating electrical machine 12 in the rotational speed control is changed, and the rotational speed of the rotating electrical machine 12 gradually increases accordingly.
- the control for prohibiting the hydraulic pressure adjustment control is then executed until a positive relative rotation state is reached.
- hysteresis is provided in the threshold value for determining the relative rotation state.
- the case where the clutch CL2 is a hydraulically driven frictional engagement device in which the engagement pressure is controlled according to the supplied hydraulic pressure has been described as an example.
- the embodiment of the present invention is not limited to this.
- the first friction engagement device and the second friction engagement device only need to be able to adjust the transmission torque capacity in accordance with the increase or decrease of the engagement pressure.
- the second clutch CL ⁇ b> 2 for shifting that is one of the plurality of friction engagement devices provided in the transmission mechanism 13 is “ The case where the second friction engagement device is used has been described as an example. However, the embodiment of the present invention is not limited to this. That is, it is also one of preferred embodiments of the present invention that, for example, other clutches, brakes, and the like provided in the speed change mechanism 13 are configured as “second friction engagement devices”.
- the second friction engagement device is a brake in the speed change mechanism 13
- a non-rotating member such as a drive device case is connected to one engagement member of the brake, and the one engagement member The rotation speed of is always zero.
- the second clutch CL2 for shifting provided in the transmission mechanism 13 is a “second friction engagement device”. Described as an example. However, the embodiment of the present invention is not limited to this. That is, as long as it is a friction engagement device provided between the rotating electrical machine 12 and the output shaft O on the power transmission path connecting the input shaft I and the output shaft O, a speed change clutch provided in the speed change mechanism 13 or the like. It is also possible to use another clutch as a “second friction engagement device”. For example, when a fluid transmission device such as a torque converter is provided between the rotating electrical machine 12 and the speed change mechanism 13, the lock-up clutch of the torque converter may be configured as a “second friction engagement device”.
- a dedicated transmission clutch provided between the rotating electrical machine 12 and the transmission mechanism 13 or between the transmission mechanism 13 and the output shaft O may be configured as a “second friction engagement device”. It is one of the preferred embodiments of the present invention.
- an automatic continuously variable transmission mechanism instead of the automatic stepped transmission mechanism, an automatic continuously variable transmission mechanism, a manual stepped transmission mechanism, a fixed transmission mechanism, or the like can be used as the transmission mechanism 13. Further, the position of the transmission mechanism 13 can also be set arbitrarily.
- the internal combustion engine control unit 30 mainly for controlling the internal combustion engine 11, and the drive device control unit for mainly controlling the rotating electrical machine 12, the first clutch CL 1, and the speed change mechanism 13.
- the configuration in which 40 (control device 4) is individually provided has been described as an example.
- the embodiment of the present invention is not limited to this. That is, for example, a configuration in which the single control device 4 controls all of the internal combustion engine 11, the rotating electrical machine 12, the first clutch CL1, the speed change mechanism 13, and the like is also one preferred embodiment of the present invention. is there.
- the control device 4 may further include a control unit for controlling the rotating electrical machine 12 and a control unit for controlling other various configurations separately. one of.
- the assignment of the function units described in the above embodiments is merely an example, and a plurality of function units can be combined or one function unit can be further divided.
- a rotary electric machine is provided in a power transmission path connecting the internal combustion engine and the wheel, and a first friction engagement device is provided between the internal combustion engine and the rotary electric machine, and a second is provided between the rotary electric machine and the wheel.
- the present invention can be suitably used for a control device that controls a vehicle drive device provided with a friction engagement device.
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Abstract
Description
また、「解放状態」は、対象となる摩擦係合装置によって係合される2つの係合部材間で回転及び駆動力が伝達されない状態を意味する。「スリップ係合状態」は、2つの係合部材が回転速度差を有する状態で駆動力を伝達可能に係合されている状態を意味する。「直結係合状態」は、2つの係合部材が一体回転する状態で係合されている状態を意味する。なお、「係合状態」は、これらスリップ係合状態及び直結係合状態の双方を含む概念として用いている。
また、「回転状態」は、回転位置、回転速度、及び回転加速度を含む概念として用いている。従って、「回転状態制御」には、回転電機の回転位置を目標回転位置になるように制御する回転位置フィードバック制御、回転電機の回転速度を目標回転速度になるように制御する回転速度フィードバック制御、或いは、回転電機の回転加速度を目標回転加速度になるように制御する回転加速度フィードバック制御等が含まれる。
この点、上記の特徴構成によれば、油圧調整制御において第二摩擦係合装置への供給油圧を適切に制御することにより、回転状態制御中における回転電機の出力トルクに基づいて、当該出力トルクを、第二摩擦係合装置の直結係合状態への移行後の所定のトルクに近づけることができる。よって、第二摩擦係合装置がスリップ係合状態から直結係合状態へと移行する際のトルク段差の発生を抑制することができる。
また、第二摩擦係合装置の制御方式に関しても、一態様として、本構成のように要求駆動力に基づく供給油圧の制御と、回転速度フィードバック制御の補正トルクに基づく供給油圧の制御とを併用することが可能である。要求駆動力と回転速度フィードバック制御の補正トルクとの双方に基づいて油圧調整制御を実行する構成とすることで、追従性高く第二摩擦係合装置の動作制御を行うことができると共に、トルク段差の発生を有効に抑制することができる。
この点に鑑み、上記の構成によれば、回転変化トルク相当分を除外して算出した補正トルクを算出するので、油圧調整制御において内燃機関のトルクの誤差による定常的な誤差を反映させて第二摩擦係合装置への供給油圧を適切に決定することができ、トルク段差の発生を有効に抑制することができる。
また、油圧調整制御を行うことによって第二摩擦係合装置の伝達トルク容量が変化するが、補正トルクを徐々に小さくすることで第二摩擦係合装置の伝達トルク容量も徐々に変化させることができる。従って、第二摩擦係合装置の伝達トルク容量の変化に伴って車輪に伝達される駆動力が変化することを抑制することができ、車両の運転者に違和感を与えることを抑制することができる。
本実施形態に係る制御装置4による制御対象となる駆動装置1の構成について説明する。本実施形態に係る駆動装置1は、いわゆる1モータパラレル方式のハイブリッド車両用の駆動装置として構成されている。この駆動装置1は、図1に示すように、内燃機関11に駆動連結される入力軸Iと車輪15に駆動連結される出力軸Oとを結ぶ動力伝達経路上に回転電機12を備えていると共に、回転電機12と出力軸Oとの間に変速機構13を備えている。入力軸Iと回転電機12との間には第一クラッチCL1が設けられている。また、変速機構13には後述するように第一クラッチCL1とは別の変速用の第二クラッチCL2が備えられている。これにより、駆動装置1は、入力軸Iと出力軸Oとを結ぶ動力伝達経路に、内燃機関11及び入力軸Iの側からの順に、第一クラッチCL1、回転電機12、及び第二クラッチCL2、を備えている。これらの各構成は、駆動装置ケース(図示せず)内に収容されている。
本実施形態に係る制御装置4の構成について説明する。図1に示すように、本実施形態に係る制御装置4は、駆動装置制御ユニット40を備えている。駆動装置制御ユニット40は、主に回転電機12、第一クラッチCL1、及び変速機構13を制御する。また、車両6には、駆動装置制御ユニット40とは別に、主に内燃機関11を制御する内燃機関制御ユニット30が備えられている。
内燃機関制御部31は、内燃機関11の動作制御を行う機能部である。内燃機関制御部31は、内燃機関11の出力トルク(内燃機関トルクTe)及び回転速度の制御目標としての目標トルク及び目標回転速度を決定し、この制御目標に応じて内燃機関11を動作させる。本実施形態では、内燃機関制御部31は、車両6の走行状態に応じて内燃機関11のトルク制御及び回転速度制御を切り替えることが可能である。トルク制御は、内燃機関11に目標トルクを指令し、内燃機関トルクTeをその目標トルクに一致させる(追従させる)制御である。回転速度制御は、内燃機関11に目標回転速度を指令し、内燃機関11の回転速度をその目標回転速度に一致させるように出力トルクを決定する制御である。
本実施形態に係る油圧調整制御の内容について説明する。なお、この油圧調整制御は、本例では、第一クラッチCL1の解放状態且つ第二クラッチCL2の係合状態で回転電機12と車輪15との間で駆動力が伝達される状態(電動走行モード)から、第一クラッチCL1の係合状態で内燃機関11と車輪15との間で駆動力が伝達される状態(スリップ走行モードを経てパラレル走行モード)へ移行させる場合に実行される。より具体的には、油圧調整制御は、内燃機関始動制御中において第一クラッチCL1が直結係合状態となった後、第二クラッチCL2をスリップ係合状態から直結係合状態に移行させる間に実行される。本実施形態では、油圧調整制御は、内燃機関始動制御中においてスリップ係合状態にある第一クラッチCL1が直結係合状態となった後、第二クラッチCL2がスリップ係合状態から直結係合状態に移行するまでの間、継続的に実行される。油圧調整制御が実行されている期間では、直結係合状態にある第一クラッチCL1とスリップ係合状態にある第二クラッチCL2とを介して、内燃機関トルクTeが車輪15に伝達される状態となっている。
目標トルク決定部43aには、内燃機関トルク指令Ceと車両要求トルクTdとが入力される。本実施形態では、内燃機関トルク指令Ceは、内燃機関11のトルク制御における目標トルクの指令値であり、内燃機関制御部31により決定される。車両要求トルクTdは、要求トルク決定部42により決定される。目標トルク決定部43aは目標トルク演算器51を備えている。目標トルク演算器51は、車両要求トルクTdから内燃機関トルク指令Ceを減算する演算を行い、その演算結果としての減算値(Td-Ce)を目標トルクTmfとして出力する。
本実施形態に係る内燃機関始動制御及び油圧調整制御の具体例について、図4のタイムチャートを参照して説明する。なお、本例では、電動走行モードでの走行中に内燃機関始動条件が成立して、スリップ走行モード(本例では、第二スリップ走行モード)を経てパラレル走行モードに切り替えられる状況を想定している。
最後に、本発明に係る制御装置の、その他の実施形態について説明する。なお、以下のそれぞれの実施形態で開示される構成は、矛盾が生じない限り、他の実施形態で開示される構成と組み合わせて適用することも可能である。
4 制御装置
11 内燃機関
12 回転電機
15 車輪
43a 目標トルク決定部
43b 回転速度制御部
46 始動制御部
47 油圧調整制御部
I 入力軸
O 出力軸
CL1 第一クラッチ(第一摩擦係合装置)
CL2 第二クラッチ(第二摩擦係合装置)
Td 車両要求トルク(要求駆動力)
Ce 内燃機関トルク指令
Nmt 目標回転速度
Nmr 実回転速度
Tmf 目標トルク
Tmb 補正トルク
Tmi 回転変化トルク
Cc2 第二クラッチトルク容量指令
Claims (10)
- 内燃機関と車輪とを結ぶ動力伝達経路に回転電機が設けられていると共に、前記内燃機関と前記回転電機との間に第一摩擦係合装置、前記回転電機と前記車輪との間に第二摩擦係合装置が設けられた車両用駆動装置を制御対象とする制御装置であって、
前記第一摩擦係合装置の解放状態且つ前記第二摩擦係合装置の係合状態で前記回転電機と前記車輪との間で駆動力が伝達される状態から、前記第一摩擦係合装置の係合状態で前記内燃機関と前記車輪との間で駆動力が伝達される状態へ移行させるときに、
前記第二摩擦係合装置のスリップ係合状態で、前記回転電機の回転状態を目標回転状態になるように制御する回転状態制御を実行すると共に、
前記第二摩擦係合装置をスリップ係合状態から直結係合状態に移行させる間に、前記第一摩擦係合装置が直結係合状態へ移行した後の前記回転状態制御中における前記回転電機のトルクに基づいて前記第二摩擦係合装置へ供給する油圧を制御する油圧調整制御を実行する制御装置。 - 前記車輪を駆動するための要求駆動力と前記内燃機関から前記回転電機に伝達されるトルクとの差分に基づいて前記回転電機の目標トルクを決定する目標トルク決定制御を更に実行し、
前記回転状態制御として、前記目標トルクに対して補正トルクを加えて前記回転電機の回転速度を目標回転速度に一致させるように制御する回転速度フィードバック制御を実行し、
前記要求駆動力と前記回転速度フィードバック制御の前記補正トルクとに基づいて前記油圧調整制御を実行する請求項1に記載の制御装置。 - 前記回転速度フィードバック制御に際して前記目標回転速度に向かって回転速度を変化させるための前記回転電機の回転変化トルク相当分を除外して算出した前記補正トルクに基づいて、前記油圧調整制御を実行する請求項2に記載の制御装置。
- 前記油圧調整制御において、前記補正トルクを時間積分した演算値に基づいて前記第二摩擦係合装置の伝達トルク容量を決定し、当該伝達トルク容量に基づいて前記第二摩擦係合装置へ供給する油圧を決定する請求項2又は3に記載の制御装置。
- 前記回転電機の出力トルクを前記目標トルクに一致させるように制御するトルク制御を更に実行可能であり、
前記油圧調整制御の実行中に前記第二摩擦係合装置が直結係合状態になったと判定した場合に、前記回転電機の制御状態を前記回転速度フィードバック制御から前記トルク制御に移行させる請求項2から4のいずれか一項に記載の制御装置。 - 前記第二摩擦係合装置が直結係合状態になったと判定した際に前記補正トルクがゼロになっていない場合には、前記回転速度フィードバック制御から前記トルク制御への移行に際して、前記回転電機の出力トルクを、前記回転速度フィードバック制御中のトルクから前記目標トルクまで徐々に変化させる移行トルク制御を実行する請求項5に記載の制御装置。
- 前記第二摩擦係合装置のスリップ係合状態から直結係合状態への移行時を含む当該移行時以前の所定期間に、前記油圧調整制御を実行する請求項1から6のいずれか一項に記載の制御装置。
- 前記第一摩擦係合装置が直結係合状態へ移行した後、前記第二摩擦係合装置をスリップ係合状態から直結係合状態に移行させるまでの間、継続的に前記油圧調整制御を実行する請求項1から7のいずれか一項に記載の制御装置。
- 前記内燃機関の停止状態且つ前記第一摩擦係合装置の解放状態から、前記第一摩擦係合装置を係合状態として前記回転電機のトルクにより前記内燃機関を始動させる内燃機関始動制御を更に実行可能であり、
前記内燃機関始動制御の実行に際して前記回転状態制御を実行し、
前記第一摩擦係合装置がスリップ係合状態を経て直結係合状態となった後に前記油圧調整制御を実行する請求項1から8のいずれか一項に記載の制御装置。 - 前記動力伝達経路に沿って前記回転電機から前記車輪へ向かって車両の前進方向に前記車輪を回転させるための駆動力が伝達される状態を正の駆動伝達状態とし、前記第二摩擦係合装置のスリップ係合状態において前記車輪側の係合部材の回転速度に対して前記回転電機側の係合部材の回転速度が高い状態を正の相対回転状態とし、
前記駆動伝達状態と前記相対回転状態との正負が不一致と判定された場合に、前記油圧調整制御の実行を禁止して前記第二摩擦係合装置へ供給する油圧を実質的にゼロとする請求項1から9のいずれか一項に記載の制御装置。
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JP5807560B2 (ja) | 2015-11-10 |
CN103562033A (zh) | 2014-02-05 |
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CN103562033B (zh) | 2016-02-17 |
US20130012353A1 (en) | 2013-01-10 |
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DE112012001807T8 (de) | 2014-03-06 |
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