CN101177140B - 车辆的驱动源控制装置 - Google Patents

车辆的驱动源控制装置 Download PDF

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CN101177140B
CN101177140B CN200710165950XA CN200710165950A CN101177140B CN 101177140 B CN101177140 B CN 101177140B CN 200710165950X A CN200710165950X A CN 200710165950XA CN 200710165950 A CN200710165950 A CN 200710165950A CN 101177140 B CN101177140 B CN 101177140B
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engine
vehicle
gear
drive source
source control
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CN101177140A (zh
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户岛裕基
铃木良英
森正宪
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Aisin Corp
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Aisin Seiki Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
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    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18Propelling the vehicle
    • B60W30/18009Propelling the vehicle related to particular drive situations
    • B60W30/18027Drive off, accelerating from standstill
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W20/00Control systems specially adapted for hybrid vehicles
    • B60W20/30Control strategies involving selection of transmission gear ratio
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00Arrangement 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
    • B60K6/20Arrangement 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
    • B60K6/42Arrangement 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
    • B60K6/48Parallel type
    • BPERFORMING OPERATIONS; TRANSPORTING
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    • BPERFORMING OPERATIONS; TRANSPORTING
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    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00Arrangement 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
    • B60K6/20Arrangement 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
    • B60K6/22Arrangement 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 apparatus, components or means specially adapted for HEVs
    • B60K6/26Arrangement 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 apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B60K2006/268Electric drive motor starts the engine, i.e. used as starter motor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/42Drive Train control parameters related to electric machines
    • B60L2240/421Speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/44Drive Train control parameters related to combustion engines
    • B60L2240/445Temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W20/00Control systems specially adapted for hybrid vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18Propelling the vehicle
    • B60W30/20Reducing vibrations in the driveline
    • B60W2030/206Reducing vibrations in the driveline related or induced by the engine
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00Input parameters relating to a particular sub-units
    • B60W2510/06Combustion engines, Gas turbines
    • B60W2510/0676Engine temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00Input parameters relating to a particular sub-units
    • B60W2510/06Combustion engines, Gas turbines
    • B60W2510/0685Engine crank angle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00Input parameters relating to occupants
    • B60W2540/10Accelerator pedal position
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00Output or target parameters relating to a particular sub-units
    • B60W2710/08Electric propulsion units
    • B60W2710/081Speed
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02NSTARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00Starting of engines by means of electric motors
    • F02N11/04Starting of engines by means of electric motors the motors being associated with current generators
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/62Hybrid vehicles
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies in electromobility

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Automation & Control Theory (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

本发明公开一种车辆的驱动源控制装置,其用于控制驱动车辆的电动机(12)和发动机(11),所述发动机(11)被控制成根据车辆的运行状态而停止。所述驱动源控制装置包括:发动机起动装置(21),其借助车辆的动能利用曲轴起动处于停止状态的发动机(11);扭矩波动估计装置(21),其用于估计利用曲轴起动发动机(11)时作用在车轮(16/16’)上的扭矩;以及扭矩波动平衡装置(21),其用于调整向电动机(12)传递的指令扭矩以平衡所估计的扭矩。

Description

车辆的驱动源控制装置
技术领域
本发明涉及车辆的驱动源控制装置,更具体地,本发明涉及利用发动机和电动机作为驱动源的车辆的驱动源控制装置。
背景技术
在JP64053659U中公开的自动变速器将惯性行驶的车辆的动能传递到内燃机以利用曲轴起动内燃机。另一方面,在JP2004-190498A中公开的内燃机控制装置包括旋转装置(电动发电机),该旋转装置输出辅助驱动力以防止由于动能损失而造成的车速下降。结果,在车辆的动能传递到内燃机时,驾驶员感觉到的由于车速降低而造成的扭矩冲击更小。
但是,如图5所示,当在车辆被驱动的条件下借助动能利用曲轴起动发动机时,产生了动能损失,当发动机开始独立旋转时,产生了发动机输出的驱动力。因此,仅通过在利用曲轴起动发动机时施加由旋转装置产生的辅助驱动力,可能无法吸收扭矩冲击。
此外,在利用曲轴起动发动机时,在发动机处产生的负荷不是稳定地作用的。如图5所示,作用在发动机上的负荷根据发动机转速的增加和气缸封闭的体积的变化而波动。结果,负荷周期性地作用在车轮上。
因此,需要提供一种车辆的驱动源控制装置,利用该驱动源控制装置可减少在车辆被驱动的情况下利用曲轴起动发动机时的冲击,以便将驱动源切换到发动机。
发明内容
根据本发明的一个方面,车辆的驱动源控制装置用于控制驱动车辆的电动机和发动机,所述发动机被控制成根据车辆的运行状态而停止,所述驱动源控制装置包括:发动机起动装置,其借助车辆的动能利用曲轴起动处于停止状态的发动机;扭矩波动估计装置,其用于估计利用曲轴起动发动机时作用在车轮上的扭矩;以及扭矩波动平衡装置,其用于调整向电动机传递的指令扭矩以平衡所估计的扭矩。
根据本发明的另一个方面,扭矩波动估计装置估计在借助动能利用曲轴起动发动机时发生的扭矩损失,并且估计发动机起动后产生的扭矩。
根据本发明的另一个方面,发动机起动装置基于加速踏板开度确定用于利用曲轴起动发动机的档位。
根据本发明的另一个方面,发动机起动装置基于加速踏板开度的变化量确定用于利用曲轴起动发动机的档位。
根据本发明的另一个方面,发动机起动装置基于加速踏板开度确定利用曲轴起动发动机时的离合器接合速度。
根据本发明的另一个方面,发动机起动装置基于加速踏板开度的变化量确定利用曲轴起动发动机时的离合器接合速度。
根据本发明的另一个方面,扭矩波动估计装置基于扭矩波动模型估计作用在车轮上的扭矩,所述扭矩波动模型是基于根据发动机曲轴角传感器的值计算的发动机旋转周期和发动机活塞的上止点来确定的。
根据本发明的另一个方面,扭矩波动平衡装置基于发动机冷却剂温度调整向电动机传递的指令扭矩。
因此,当车辆被电动发电机产生的扭矩驱动时,能够在不造成冲击的情况下起动发动机。结果,车辆的驱动源从电动发电机平滑地切换到发动机。
附图说明
从下面参考附图详细描述中将更清楚地看出本发明的上述和其它特征及特点,其中:
图1为示出混合动力车辆的构造的简图,该混合动力车辆应用了根据本发明实施例的车辆的驱动源控制装置;
图2为示意性地示出车辆的变速器的构造(四档)的概略图;
图3为示出在车辆的驱动源控制装置(HV-ECU)中,在每个预定的时间段执行的程序的流程图;
图4为示出当车辆从车辆停止的状态开始移动时,车辆行为的示例的曲线图;
图5为示出当车辆从车辆停止的状态开始移动时,采用现有技术的车辆的行为的曲线图。
具体实施方式
下面参考附图描述本发明的实施例。图1为示出混合动力车辆的构造的简图,该混合动力车辆应用了本发明的实施例。参考图1,发动机11(发动机在下面也称为ENG),例如采用内燃机作为ENG 11,和电动发电机(或电动机)12(后面也称为MG12)相互并联布置,从而通过发动机11和/或通过MG12驱动车轮。MG12由存储在电池19内的电力驱动。
从发动机11输出的驱动力传递到变速器13。在该实施例中,采用自动手动变速器(AMT)作为变速器13。另外,驱动力通过差速装置(差速器)14传递到驱动轴15和15’,然后传递到驱动轮16和16,。差速装置(差速器)14用作输出从发动机11和MG12传递来的驱动力的输出部分。按照相同的方式,从MG12输出的驱动力也通过差速装置(差速器)14传递到驱动轴15和15’和驱动轮16和16’,以驱动车辆。
另外,图1所示的混合动力车辆包括混合动力车辆电控单元21(后面称为HV-ECU21)、电动发电机电控单元(后面称为MG-ECU)、逆变器22、发动机电控单元23(后面称为EG-ECU23)、离合器致动器17、自动手动变速器电控单元24(后面称为AMT-ECU24)和电池电控单元25(后面称为电池ECU25)。MG-ECU向MG12输出指令信号以使MG12再生发电或驱动MG12。EG-ECU23使发动机11停止或者控制发动机11的燃烧状态。离合器致动器17设置在变速器13内。
AMT-ECU24控制换档致动器18以实现最合适的换档。电池ECU25控制电池19的充电状态。
HV-ECU21用作发动机起动装置、扭矩波动估计装置和扭矩波动平衡装置。此外,HV-ECU21根据驾驶员的驱动意图控制和管理MG-ECU、逆变器22和EG-ECU23。另外,EG-ECU23与AMT-ECU24协作以实现发动机11的效率最高的燃烧状态。此外,当通过起动机20或车辆的动能利用曲轴起动发动机时,EG-ECU和AMT-ECU24一起实施燃油控制。另外,在驾驶员座位附近提供指示器26以显示车速。
图2为示意性地示出混合动力车辆采用的变速器的构造(四档)的概略图。在图2中建立了第四档。参考变速器13的构造,飞轮32固定在发动机11的输出轴31的端部,在飞轮32上设置的离合器部件33能够通过离合器17接合/脱开。离合器的从动件通过花键等与变速器13的输入轴34接合,以便与输入轴34一体旋转。从离合器侧开始,第一驱动齿轮35、倒档驱动齿轮36(后面把“倒档”简写为“ Rev.”,例如,Rev.驱动齿轮36)、第二驱动齿轮37设置在输入轴34上以便与输入轴34一体地旋转。另外,第三驱动齿轮38、第四驱动齿轮39、第五驱动齿轮40和第六驱动齿轮41设置在输入轴34上以便相对于输入轴34旋转。另外,变速器13的输出轴42设置为与输入轴34平行。第一从动齿轮43和第二从动齿轮44可旋转地设置在输出轴42上,从而第一从动齿轮43和第二从动齿轮44分别与第一驱动齿轮35和第二驱动齿轮37啮合。另外,第三从动齿轮45、第四从动齿轮46、第五从动齿轮47和第六从动齿轮48设置在输出轴42上,以便与输出轴42一体地旋转。驱动齿轮49设置在输出轴42的靠近离合器的端部上,使得该驱动齿轮与输出轴42一体地旋转。驱动齿轮49与差速装置(差速器)14的齿圈70啮合。另外,轴50布置在变速器13内部,与输入轴34平行。倒档空转齿轮51可旋转地设置在轴50上。倒档空转齿轮可在轴50的轴向上移动。当倒档空转齿轮51移动到靠近离合器的位置(在图2中用粗线示出)时,倒档空转齿轮51不与倒档驱动齿轮36啮合,但当倒档空转齿轮移动到靠近第六驱动齿轮41的位置(在图2中用细线示出)时,倒档空转齿轮51可与倒档驱动齿轮36啮合。
轴毂件52设置在输出轴42上,位于第一从动齿轮43和第二从动齿轮44之间;轴毂件53设置在输入轴34上,位于第三驱动齿轮38和第四驱动齿轮39之间;轴毂件54设置在输入轴34上,位于第五驱动40第六驱动齿轮41之间。轴毂件52与输出轴42一体旋转,轴毂件53和54与输入轴34一体旋转。接合件(例如花键等)设置在每个轴毂件52、53和54的外周上。另外,套筒件55、56和57设置在分别形成于轴毂件52、53和54的外周上的接合件的外周上,使得轴毂件52、53和54可分别与套筒件55、56和57接合。可通过换档致动器18使套筒件55、56和57在输入轴34和输出轴42的轴向(在图2中为水平方向)上移动,以建立可传递驱动力的状态或者空档状态。当建立可传递驱动力的状态时,例如,套筒件56或者与设置在第三驱动齿轮38上的接合件接合,或者与设置在第四驱动齿轮39上的接合件接合。另一方面,当建立空档状态时,例如,套筒件56既不与第三驱动齿轮38接合,也不与第四驱动齿轮39接合。图2示出了通过将套筒件56移动到图2的左侧而建立第四档的状态。另外,齿轮58设置在套筒件55的外周上,位于设置在输出轴42上的第一从动齿轮43和第二从动齿轮44之间。在倒档空转齿轮51与倒档驱动齿轮36啮合的条件下,齿轮58与倒档空转齿轮51啮合,以建立空档状态或者倒档驱动状态。
如上所述,通过离合器致动器17使离合器接合,以基于由换档致动器18选择的传动比将发动机11的驱动力传递到设置在输出轴42端部的驱动齿轮49。另外,驱动齿轮49设置在输出轴42的端部上以便与差速装置(差速器)14的齿圈70啮合。从发动机11输出的驱动力通过驱动齿轮49传递到差速装置(差速器)14以便驱动车轮。另外,车辆的动能通过驱动齿轮49和变速器13传递到发动机11。
另一方面,从MG12输出的驱动力传递到设置在MG输出轴60的端部的驱动齿轮61,使得驱动齿轮61与输出轴60一体地旋转。中间减速轴62设置为与MG输出轴60平行。从动齿轮63设置在中间减速轴62上,以便可与驱动齿轮61啮合。另外,驱动齿轮64设置在中间减速轴62上,以便与差速装置(差速器)14的齿圈70啮合。从MG12输出的驱动根据预定的传动比传递到驱动齿轮64,以便驱动车轮。
根据上述构造,从发动机11和MG12传递来的驱动力最终在HV-ECU21的控制下传递到齿圈70,以便通过差速装置(差速器)14驱动驱动轴15和15’以及驱动轮16和16’,如果需要的话,差速装置(差速器)14吸收从MG12输出的驱动力和从发动机11输出的驱动力之间的转速差。
另外,MG12建立驱动状态和再生发电状态。当建立驱动状态时,MG12把从电池19供应的电能转换成扭矩。另外,当建立再生发电状态时,MG12把扭矩转换成电能。为使MG12的转子旋转,向定子件66供给三相电力,以使大电流在定子件66的所需位置流动。结果,产生了旋转磁场,并且电流流过转子的铁芯部分以使转子旋转。因此,对MG12进行控制(包括产生驱动力和旋转方向),从而能够有效地实现转换。
在MG12的输出轴60的另一端设置解角器(resolver)65作为旋转检测装置。所述输出轴60的另一端是与设置有驱动齿轮61的一端相对的端部。解角器65检测在MG12的卷绕定子件66和与MG输出轴60一体旋转的转子件67之间形成的相对角度,以便将检测到的相对角度转换成解角器信号。例如,通过基于与MG12的极数和MG12的传动比有关的数值来把解角器信号转换成车速信号,可将解角器信号用作指示车速的信号。
下面参考附图描述对混合动力车辆的驱动源的控制。图3为示出在每个预定的时间段,在HV-ECU21中执行的程序的流程图。
参考图3,在步骤S001,HV-ECU21判断车速是否达到可起动发动机的速度或者更高的速度。如果车速低于可起动发动机的速度,那么不利用曲轴起动发动机(在步骤S001中为NO)。
另一方面,如果车速达到可起动发动机的速度或者更高的速度,那么在步骤S002,HV-ECU21进一步判断发动机起动请求是否输入到HV-ECU21。如果在车辆刚刚开始移动或者车辆以经济、环保的方式被驱动(也就是说,发动机停止,并且由电动机驱动车辆(MG运行))的条件下,满足发动机起动请求的条件,  那么执行步骤S002后面的程序。另一方面,当在例如车辆由发动机的动力驱动(ENG运行)的条件下,不满足发动机起动请求时,则不利用曲轴起动发动机(在步骤S002中为NO)。
当车速达到可起动发动机的速度或更高速度,并且满足发动机请求的条件下,满足利用曲轴起动发动机11的条件时,那么HV-ECU21参考曲线图或类似物确定与当前加速踏板压下水平和当前发动机温度(冷却剂温度)对应的离合器接合速度,所述曲线图或类似物通过利用发动机温度(冷却剂温度)和加速踏板压下水平作为参数来确定接合离合器的必要扭矩(步骤S003)。加速踏板压下水平对应于驾驶员踩下加速踏板的量。另外,HV-ECU21根据当前车速从利用曲轴起动发动机11时可用的多个档位中选择最适合的档位。
另外,当加速踏板压下水平处于预定的大压下水平范围内时,例如,当加速踏板压下水平超过70%时,HV-ECU21确定车辆突然且快速地起步,然后HV-ECU21向MG12发送指令信号以在MG12产生必要的扭矩,同时,HV-ECU21根据曲线图控制离合器以使离合器快速接合,从而使车速能够快速达到可起动发动机的速度。如下面所述,在这种情况下也产生必要的MG扭矩以平衡利用曲轴起动发动机11时产生的扭矩波动。
HV-ECU21开始控制离合器以使离合器以按上述方法确定的离合器接合速度接合,并且HV-ECU21控制变速器13以建立所选择的档位,然后,HV-ECU21开始将车辆的动能传递到发动机11(步骤S004)。
在步骤S004之后,为确定利用曲轴起动发动机11时产生的扭矩波动,在步骤S005中,HV-ECU21根据从发动机曲轴角传感器(未示出)传递来的输出信号值确定发动机旋转周期。然后,在步骤S006中,HV-ECU21确定发动机活塞(未示出)的上止点(后面称为TDC)。
HV-ECU21初步确定扭矩波动模型,该扭矩波动模型表示利用曲轴起动发动机11时波动的发动机扭矩的模型。在步骤S007,HV-ECU21调整初步确定的扭矩波动模型,以使发动机旋转周期与发动机活塞的TDC同步,然后,HV-ECU21计算用于平衡离合器接合时作用在车轮上的扭矩的反相信号值。具体地,当利用曲轴起动发动机时,反相信号值为正,因为在发动机11处产生负荷。发动机11起动后,反相信号值为负,因为已经为利用发动机扭矩驱动车辆产生了必要的发动机扭矩。
此外,当在发动机冷却剂温度低的条件下利用曲轴起动发动机11时,与发动机热机后利用曲轴起动发动机11的情况相比,作用在发动机11上的负荷更小。因此,可以为HV-ECU21添加额外的功能,使得HV-ECU21根据发动机冷却剂温度来调整反相信号值的波动范围。
在步骤S008,HV-ECU21基于反相信号值来计算用于平衡曲轴起动发动机时的扭矩波动的必要的平衡扭矩值。
最后,在步骤S009,HV-ECU21将通过把平衡扭矩和车辆驱动扭矩加起来得到的电动机指令扭矩(指令扭矩)传递到MG12。
图4示出了当车辆从如下状态起步时的车辆行为示例,即:车辆已经停止,并且随后被驱动。在加速踏板开度保持为0%并且车速保持为0的状态下,即在车辆停止的状态下,当驾驶员踩下加速踏板时,产生MG扭矩,然后车辆由MG扭矩驱动。当车辆由MG扭矩驱动时,离合器不接合。因此,发动机11不向车轮输出扭矩。
然后,当车速达到可起动发动机的速度时,HV-ECU21执行在图3的步骤S003之后的步骤中的发动机起动控制,从而HV-ECU21控制离合器使其在与车辆条件和驾驶员驱动意图相适应的档位和离合器接合速度(梯度)接合。
当车辆的动能开始通过离合器传递到发动机11时,发动机的转速提高,同时,发生动能的能量损失。
另一方面,因为MG12输出用于平衡动能的能量损失的平衡扭矩,所以抑制了作用在车轮上的扭矩的波动(参考“作用在车轮上的组合扭矩”部分,其中,一条线指示作用在车轮上的扭矩的波动)。
当发动机起动完成,并且发动机输出的扭矩传递到车轮时,在MG12产生的扭矩急剧减少。结果,车辆的驱动源从MG12切换到发动机11。
此外,在图4所示的实例中,从刚好在发动机起动完成之前的时刻起,向MG12作用一段预定时间的负扭矩值,以执行MG12的再生发电控制。HV-ECU21执行再生发电控制以减少由于发动机输出扭矩和MG输出扭矩的组合扭矩超过目标组合扭矩而造成的冲击。HV-ECU21计算目标组合扭矩以响应驾驶员的驱动请求。
如上所述,在车辆以经济、环保的方式被驱动的条件下,当借助动能利用曲轴起动发动机11时,抑制了扭矩波动。
以上描述的本发明的实施例仅仅是示例。因此,不应把本发明理解为仅限于上述具体的实施例。可以根据例如采用本发明的车辆的具体规格而对本发明做出多种变型和改进。
例如,在上述实施例中,当车速达到可起动发动机的速度时,利用曲轴起动发动机11。但是,也可在如下状态利用曲轴起动发动机,即:在发动机11停止时,加速踏板开度增加并且加速踏板开度的增加量超过预定水平。
另外,在上述实施例中,HV-ECU21基于根据发动机曲轴角传感器的值计算的发动机旋转周期和发动机活塞的TDC,通过调整预设的扭矩波动模型来确定作用在车轮上的扭矩。但是,HV-ECU21也可基于在利用曲轴起动发动机11时的离合器接合速度或所选择的档位来确定作用在车轮上的扭矩。
根据本发明的实施例,车辆的驱动源控制装置根据车辆的运行条件来控制MG12和发动机11以驱动车辆,该驱动源控制装置包括HV-ECU21,其用作:发动机起动装置,用于借助车辆的动能利用曲轴起动处于停止状态的发动机;扭矩波动估计装置,用于估计在利用曲轴起动发动机11时作用在车轮16和16’上的扭矩;以及扭矩波动平衡装置,用于调整向MG12传递的指令扭矩以平衡所述估计的扭矩。
根据本发明的实施例,扭矩波动估计装置估计借助动能利用曲轴起动发动机11时发生的扭矩损失,而且扭矩波动估计装置估计发动机11起动之后产生的扭矩。
根据本发明的实施例,驱动源控制装置基于发动机旋转周期和发动机活塞的TDC来确定扭矩波动模型。相应地,当车辆由MG12产生的扭矩驱动时,能够在不造成冲击的情况下起动发动机11。结果,车辆的驱动源从MG12平滑地切换到发动机11。

Claims (8)

1.一种车辆的驱动源控制装置,其用于控制驱动车辆的电动机(12)和发动机(11),所述发动机(11)被控制成根据车辆的运行状态而停止,所述驱动源控制装置包括:
发动机起动装置(21),其借助车辆的动能利用曲轴起动处于停止状态的发动机(11);
扭矩波动估计装置(21),其用于估计利用曲轴起动发动机(11)时作用在车轮(16/16’)上的扭矩;以及
扭矩波动平衡装置(21),其用于调整向电动机(12)传递的指令扭矩以平衡所估计的扭矩,
当满足利用曲轴起动发动机(11)的条件时,所述驱动源控制装置参考曲线图确定与当前加速踏板压下水平和当前发动机温度对应的离合器接合速度,其中所述曲线图通过利用发动机温度和加速踏板压下水平作为参数来确定接合离合器的必要扭矩,并且所述驱动源控制装置根据当前车速从利用曲轴起动发动机时可用的多个档位中选择最适合的档位。
2.根据权利要求1中所述的车辆的驱动源控制装置,其中,
所述扭矩波动估计装置(21)估计在借助动能利用曲轴起动发动机(11)时发生的扭矩损失,并且估计发动机(11)起动后产生的扭矩。
3.根据权利要求1或2中所述的车辆的驱动源控制装置,其中,
发动机起动装置(21)基于加速踏板开度确定用于利用曲轴起动发动机(11)的档位。
4.根据权利要求1或2中所述的车辆的驱动源控制装置,其中,
发动机起动装置(21)基于加速踏板开度的变化量确定用于利用曲轴起动发动机(11)的档位。
5.根据权利要求1或2中所述的车辆的驱动源控制装置,其中,
发动机起动装置(21)基于加速踏板开度确定利用曲轴起动发动机(11)时的离合器接合速度。
6.根据权利要求1或2中所述的车辆的驱动源控制装置,其中,
发动机起动装置(21)基于加速踏板开度的变化量确定利用曲轴起动发动机(11)时的离合器接合速度。
7.根据权利要求1或2中所述的车辆的驱动源控制装置,其中,
扭矩波动估计装置(21)基于扭矩波动模型估计作用在车轮(16/16’)上的扭矩,所述扭矩波动模型是基于根据发动机曲轴角传感器的值计算的发动机旋转周期和发动机活塞的上止点来确定的。
8.根据权利要求1或2中所述的车辆的驱动源控制装置,其中,
扭矩波动平衡装置(21)基于发动机冷却剂温度调整向电动机(12)传递的指令扭矩。
CN200710165950XA 2006-11-10 2007-11-09 车辆的驱动源控制装置 Expired - Fee Related CN101177140B (zh)

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