CN113246713B - 一种混合动力驱动系统 - Google Patents

一种混合动力驱动系统 Download PDF

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CN113246713B
CN113246713B CN202110535978.8A CN202110535978A CN113246713B CN 113246713 B CN113246713 B CN 113246713B CN 202110535978 A CN202110535978 A CN 202110535978A CN 113246713 B CN113246713 B CN 113246713B
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何大为
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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
    • B60K6/22—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 apparatus, components or means specially adapted for HEVs
    • B60K6/26—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 apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60K—ARRANGEMENT 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
    • B60K6/00—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
    • B60K6/22—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 apparatus, components or means specially adapted for HEVs
    • B60K6/28—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 apparatus, components or means specially adapted for HEVs characterised by the electric energy storing means, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
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    • F16H57/0479—Gears or bearings on planet carriers
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Abstract

本发明提供了一种混合动力驱动系统，其特征在于：包括发动机(1)、双行星排构件(200)、第一电机(3)、第一电机控制器(4)、电池(5)、第二电机控制器(6)、第二电机(7)和车轮(8)、行星排输出齿轮(9)，双行星排构件(200)包括第一行星排(210)和第二行星排(220)；发动机(1)与第一行星架(211)连接，第一电机(3)与第二齿圈(222)连接，第一太阳轮(213)与第二行星架(221)连接，第一齿圈(212)分别与第二太阳轮(223)和行星排输出齿轮(9)连接，行星排输出齿轮(9)与第二电机(7)共同驱动车轮(8)。该驱动系统结构紧凑，体积小，能够避免出现动力中断，大大提高了车辆的安全性能。

Description

一种混合动力驱动系统
技术领域
本发明涉及混动动力驱动技术，具体说，涉及一种混合动力驱动系统。
背景技术
现有的功率分流混合动力驱动装置，包括发动机1、行星排2、第一电机3、行星排输出齿轮9、第二电机7、车轮8，其中，行星排2包括行星架21、齿圈22、太阳轮23。发动机1与行星架21连接，第一电机3与太阳轮23连接，齿圈22与行星排输出齿轮9连接，行星排输出齿轮9与第二电机7共同驱动车轮8。
发动机1的动力通过行星排2分流成两路，一路驱动第一电机3发电后供给第二电机7，另一路通过行星排输出齿轮9和第二电机7共同驱动车轮8。
如图1，行星排2为2K-H行星排，可以得到运动学和动力学特性的公式：
nMG1+k nOUT＝(k+1) (1)
TMG1:TOUT：TICE＝1:k:(k+1) (2)
其中:nMG1、nOUT、nICE分别是第一电机3转速、行星排输出齿轮9转速、发动机1转速；TMG1、TOUT、TICE分别是第一电机3扭矩、行星排输出齿轮9扭矩、发动机1扭矩；k为行星排2的速比。
现有技术中齿圈22输出，在停车发电时，齿圈22转速为0，行星排2无法获得飞溅润滑，因此需要增设一套机油泵对轮系进行润滑，结构复杂并且增加了系统的机械损耗。现有技术中行星排2的速比k＝2.6，k的大小受系统的制约，不能做大或者做小。若将k做大，可提高行星排输出扭矩比例，减小发电机的体积与重量；但k增大，降低了行星排的效率，同时会增加齿圈直径和惯量，使机构的振动和机械损耗增大。
发明内容
本发明的目的是提供一种结构紧凑，体积小，能够避免出现动力中断，大大提高了车辆的安全性能的混合动力驱动系统。
本发明的技术方案是提供了一种混合动力驱动系统，包括发动机、双行星排构件、第一电机、第一电机控制器、电池、第二电机控制器、第二电机和车轮、行星排输出齿轮；
双行星排构件包括第一行星排和第二行星排；
第一行星排包括第一行星架和第一齿圈、第一太阳轮；
第二行星排包括第二行星架和第二齿圈、第二太阳轮；
发动机与第一行星架连接，第一电机与第二齿圈连接，第一太阳轮与第二行星架连接，第一齿圈分别与第二太阳轮和行星排输出齿轮连接，行星排输出齿轮与第二电机共同驱动车轮；
电池分别通过第一电机控制器和第二电机控制器与第一电机和第二电机连接。
进一步地，第一行星排和第二行星排220均为2K-H行星排，混合动力驱动系统按照以下的运动学和动力学方程运行：
nMG1+k200nOUT＝(1+k200)nICE (3)
TMG1∶TOuT∶TICE＝1∶k200∶(1+k200) (4)
Figure BDA0003069842860000021
其中：nMG1是第一电机转速；nOUT是行星排输出齿轮转速；nICE是发动机1转速；TMG1是第一电机扭矩；TOUT是行星排输出齿轮扭矩；TIcE是发动机扭矩；k200为双行星排构件的速比；k1是第一行星排的速比；k2是第二行星排的速比。
进一步地，选择k1＝2，k2＝3，
Figure BDA0003069842860000022
混合动力驱动系统的速比k200值为3。
进一步地，发动机的动力与第二电机的动力可分别单独作用于车轮，在车辆行驶过程中，其中一个动力源出现故障时，另外一个动力源作出调整，防止动力中断。
本发明还提供了了一种混合动力驱动系统的系统故障的跛行控制方法，其特征在于：包括以下模式：
车辆在混动运行时，当电池出现故障，电池功率PBT降为0，混合动力驱动系统进入电池故障坡行模式S1，在模式S1下，发动机迅速补偿电池功率损失，发动机补偿功率dPICE＝PBT，车辆能保持当前车速运行，同时，限制车辆的最高车速，限制发动机进入停机，并对驾驶员发出预警；
车辆在混动运行时，当发动机或第一电机出现故障，无法正常工作时，混合动力驱动系统进入发动机故障跛行模式S2，在模式S2下，停止发动机和第一电机工作，发动机转速降为0，第一电机空转转速随车速的变化而变化；此时，第二电机补偿因发动机停机减少的功率，第二电机补偿功率dPMG2＝PICE+PMG1，此时混合动力驱动系统总功率降低，且所有功率来源于电池，不能长时间运行，混合动力驱动系统限制车辆的最高车速，并提示驾驶员将车停靠到安全区域；PICE是发动机的输出功率，PMG1是第一电机的输出功率；
车辆在混动运行时，当第二电机出现故障，混合动力驱动系统进入第二电机故障跛行模式S3，在模式S3下，调整发动机的控制策略，不再延经济油耗曲线运行，补偿因第二电机故障损失的功率和扭矩，此时，发动机补偿功率dPICE＝PMG2，发动机补偿扭矩
Figure BDA0003069842860000031
PMG2是第二电机的输出功率；
TMG2是第二电机扭矩；
iMG2为第二电机到车轮的传动比，
iICE为发动机到车轮的总传动比，
Figure BDA0003069842860000032
iOUT行星排输出齿轮到车轮的传动比；
k200为双行星排构件的速比；
第二电机处于随动状态，维持当前车况运行，并发出故障预警，限制最高车速。
本发明的有益效果是：
(1)本方案在停车发电时，第二齿圈的转动可以搅动齿轮油，对星排及轴承进行润滑。因此，本方案克服了现有技术停车发电工况不能搅油润滑的缺点，可不依赖机油泵实现全工况飞溅润滑。
(2)本方案通过两个行星排的动力耦合，获得更优的速比参数。现有技术的速比k为2.6，本方案的实施例速比k200为3，本方案的结构更加紧凑。
(3)对于相同的发动机，发动机最大扭矩一样，现有技术的第一电机最大扭矩TMG1＝1/3.6TICE，本方案的第一电机的最大扭矩TMG1′＝1/4TICE，显然，本方案的第一电机体积要比现有技术的第一电机体积小；
(4)行星排输出齿轮的扭矩与发动机扭矩的比值(简称为行星排输出传动比)，现有技术方案行星排输出传动比
Figure BDA0003069842860000041
本方案行星排输出传动比
Figure BDA0003069842860000042
显然，本方案的行星排输出传动比大于现有方案行星排输出传动比，现有方案有利于减小行星排输出齿轮到车轮的速比。也就是说，同样地输入和输出，本方案的减速器比现有技术更紧凑；
(5)本发明的功率分流混合动力系统具备两个动力源，发动机的动力与第二电机的动力可单独作用于车轮，本发明提供了一种双动力源的跛行控制方法，汽车在混动行驶过程中，其中一个动力源出现故障时，另外一个动力源可以迅速调整避免出现动力中断，大大提高了车辆的安全性能；
(6)本发明还提供了基于电池功率为“零”的电量SOC平衡控制方法：当车辆处于功率平衡时，系统可以精确调节发动机、第一电机和第二电机的功率，使电池的输出功率PBT保持为0。本发明还提供了SOC平衡点的控制模型SOC＝f(Va，Acc％)，根据不同的车速、负荷大小设置不同的SOC平衡点，通过学习驾驶员的驾驶习惯设置平衡点的最大值和最小值。
附图说明
图1是现有技术方案原理图；
图2是本实施例所述技术方案的原理图；
图3是本实施例所述技术方案SOC控制策略；
图4是本实施例所述技术方案车辆跛行控制策略；
图5是SOC平衡时的能量流示意图；
图6是EV工况时的能量流示意图；
图7是发动机直驱时的能量流示意图。
其中：1-发动机，2-行星排，21-行星架，22-齿圈，23-太阳轮，3-第一电机，200-双行星排构件，210-第一行星排，211-第一行星架，212-第一齿圈，213-第一太阳轮，220-第二行星排，221-第二行星架，222-第二齿圈，223-第二太阳轮，4-第一电机控制器，5-电池，6-第二电机控制器，7-第二电机，8-车轮，9-行星排输出齿轮。
具体实施方式
以下将结合实施例和图1-7对本发明的构思、具体步骤及产生的技术效果进行清楚、完整的描述，以充分地理解本发明的目的、特征和效果。显然，所描述的实施例只是本发明的一部分实施例，而不是全部实施例，本领域普通技术人员根据这些实施方式所作的功能、方法、或者结构上的等效变换或替代，均属于本发明的保护范围之内。
如图2所示，该实施例提供了一种混合动力驱动系统，包括发动机1、双行星排构件200、第一电机3、第一电机控制器4、电池5、第二电机控制器6、第二电机7和车轮8、行星排输出齿轮9。
双行星排构件200包括第一行星排210和第二行星排220。
第一行星排210包括第一行星架211和第一齿圈212、第一太阳轮213；
第二行星排220包括第二行星架221和第二齿圈222、第二太阳轮223。
发动机1与第一行星架211连接，第一电机3与第二齿圈222连接，第一太阳轮213与第二行星架221连接，第一齿圈212分别与第二太阳轮223和行星排输出齿轮9连接，行星排输出齿轮9与第二电机7共同驱动车轮8。
电池5分别通过第一电机控制器4和第二电机控制器6与第一电机3和第二电机7连接。
如图2所示，第一行星排210和第二行星排220均为2K-H行星排，可得到以下的运动学和动力学关系式(3)和(4)
nMG1+k200nOUT＝(1+k200)nICE (3)
TMG1∶TOUT∶TICE＝1∶k200∶(1+k200) (4)
Figure BDA0003069842860000051
其中：nMG1是第一电机3转速；nOUT是行星排输出齿轮9转速；nICE是发动机1转速；TMG1是第一电机3扭矩；TOUT是行星排输出齿轮9扭矩；TICE是发动机1扭矩；k200为双行星排构件200的速比；k1是第一行星排210的速比；k2是第一行星排220的速比。
该实施例中：
选择k1＝2，k2＝3，
Figure BDA0003069842860000052
由于本实施例为双行星排，故其速比k200值为3。
本发明的功率分流混合动力系统具备两个动力源，由于能力守恒，车轮的输出功率PW满足式(6)的关系：
PW＝PICE+PMG1+PMG2+PBT (6)
其中：PICE是发动机的输出功率，PMG1是第一电机的输出功率，PMG2是第二电机的输出功率，PBT是电池的输出功率。
如图2所示，发动机的动力与第二电机的动力可分别单独作用于车轮。在车辆行驶过程中，其中一个动力源出现故障时，另外一个动力源迅速作出调整，避免出现动力中断现象。
混合动力车辆电池容量较小，一般小于1.5kw.h。电池的电量SOC跟车速Va、油门大小Acc％、电池的特性有关，常温下可简化为SOC＝f(Va，Acc％)。
当车辆处于功率平衡时，阻力功率Pf＝PW且PW≥PICEMIN，PICEMIN为发动机经济运行的最小输出功率，此时系统可以精确调节发动机、第一电机和第二电机的功率，使电池的输出功率PBT保持在0附近。
由于实际行驶工况复杂，为了兼顾车辆的加速性能和节能效果，根据车速和油门特性，设置不同的SOC平衡点。为了实现这个功能，该实施例还提出了一种基于电池输出功率为“零”的电量SOC平衡控制方法，具体包括：
当汽车处于高速行驶，如车速Va高于阈值m时，SOC设置较高的平衡点，SOC＝55％，有利于保持高速的动力性能；
当汽车处于中、低车速，小负荷行驶，如车速Va小于阀值m，且油门Acc％小于阈值a时，SOC设置中等的平衡点，SOC＝40％；
当汽车处于中、低车速，中、大负荷行驶，如车速Va小于m，且油门Acc％大于阈值a时，SOC设置较低的平衡点，SOC＝35％。
SOC平衡点的控制范围可通过学习驾驶员的用车习惯调整设置，如驾驶员驾驶比较剧烈驾驶时，SOC的平衡点范围可设置为±10％；如驾驶员的驾驶比较平稳时，SOC的平衡点范围可设置为±5％。当汽车处于某一工况行驶，SOC高于该工况下SOC平衡上限值时，可通过关闭发动机，进入EV工况，消耗电池的能量，达到SOC的平衡控制。电池SOC控制逻辑如图3所示。
该实施例还提供了动力系统故障的跛行控制方法，具体包括：
本发明的混合动力系统有两套独立的动力源，在行驶过程中其中一个动力源出现故障时，系统可迅速作出调整，调节另外一个动力源的功率输出，避免车辆出现动力中断现象，此时，动力系统进入跛行控制状态。
一般情况下，车轮的输出功率PW＝PICE+PMG1+PMG2+PBT，车辆在混动运行时，当电池出现故障，电池输出功率PaT降为0，系统进入电池故障坡行模式S1，发动机迅速补偿电池功率损失，发动机补偿功率dPICE＝PBT，车辆能保持当前车速运行。但由于系统的最大功率降低，需限制车辆的最高车速(如限速135km/h)，限制发动机进入停机，同时需向驾驶员发出预警。此时能量流如图5所示。
由公式(3)可知发动机、第一电机、行星排输出齿轮的转速关系，其中两个转速确定了，第三个转速才能确定。
车辆在混动运行时，当发动机或第一电机出现故障，无法正常工作时，系统进入发动机故障跛行模式S2，系统迅速停止发动机和第一电机工作，发动机转速降为0，第一电机(空转)转速随车速的变化而变化。此时，第二电机需补偿因发动机和第一电机停机减少的功率，第二电机补偿功率dPMG2＝PICE+PMG1，此时系统总功率降低，且所有功率来源于电池，车辆不能长时间运行，系统需限制车辆的最高车速(如立即限速120km/h，并随SOC的降低进一步降低最高车速)，提示驾驶员将车停靠到安全区域。此时能量流如图6所示。由于发动机和第一电机必须同时受控，才能形成可控的功率分流，发动机功率PICE分成两路，一路是第一电机功率PMG1，一路分到车轮，即行星排输出齿轮功率POUT，实际上补偿的是发动机输出到车轮的功率，所以是dPMG2＝PICE+PMG1，PMG1发电为负。
车辆在混动运行时，当第二电机出现故障，系统进入第二电机故障跛行模式S3，迅速调整发动机的控制策略，不再延经济油耗曲线运行，补偿因第二电机故障损失的功率和扭矩，尽可能维持当前车况运行，并发出故障预警，由于轮端扭矩受限，限制最高车速(如限速100km/h)。
此时，发动机补偿功率dPICE＝PMG2，发动机补偿扭矩
Figure BDA0003069842860000071
Figure BDA0003069842860000072
(iMG2为第二电机到车轮的传动比，iICE为发动机到车轮的总传动比，
Figure BDA0003069842860000073
iOUT行星排输出齿轮到车轮的传动比)，第二电机处于随动状态。当TICE+dTICE≥TWOT(TWOT为发动机最大扭矩)时，发动机延外特性工作。此时，第一电机根据系统用电功率需求确定工作转速。此时能量流如图7所示。
在其它实施例中，双行星排的参数
Figure BDA0003069842860000081
通过调整行星排参数k1、k2可以获得不同的动力学和运动学关系。说明书种提到的SOC值、范围，跛行报警、限速值等包括但不限于实施例所列举的值。
对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情维下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。

Claims (2)

1.一种混合动力驱动系统，其特征在于：包括发动机（1）、双行星排构件（200）、第一电机（3）、第一电机控制器（4）、电池（5）、第二电机控制器（6）、第二电机（7）和车轮（8）、行星排输出齿轮（9）；
双行星排构件（200）包括第一行星排（210）和第二行星排（220）；
第一行星排（210）包括第一行星架（211）和第一齿圈（212）、第一太阳轮（213）；
第二行星排（220）包括第二行星架（221）和第二齿圈（222）、第二太阳轮（223）；
发动机（1）与第一行星架（211）连接，第一电机（3）与第二齿圈（222）连接，第一太阳轮（213）与第二行星架（221）连接，第一齿圈（212）分别与第二太阳轮（223）和行星排输出齿轮（9）连接，行星排输出齿轮（9）与第二电机（7）共同驱动车轮（8）；
电池（5）分别通过第一电机控制器（4）和第二电机控制器（6）与第一电机（3）和第二电机（7）连接；
发动机的动力与第二电机（7）的动力可分别单独作用于车轮，在车辆行驶过程中，其中一个动力源出现故障时，另外一个动力源作出调整，防止动力中断。
2.一种用于权利要求1所述的混合动力驱动系统的系统故障的跛行控制方法，其特征在于：包括以下模式：
车辆在混动运行时，当电池出现故障，电池功率
Figure DEST_PATH_IMAGE001
降为0，混合动力驱动系统进入电池故障坡行模式S1，在模式S1下，发动机迅速补偿电池功率损失，发动机补偿功率d
Figure 690792DEST_PATH_IMAGE002
，车辆能保持当前车速运行，同时，限制车辆的最高车速，限制发动机进入停机，并对驾驶员发出预警；
车辆在混动运行时，当发动机或第一电机出现故障，无法正常工作时，混合动力驱动系统进入发动机故障跛行模式S2，在模式S2下，停止发动机和第一电机工作，发动机转速降为0，第一电机空转转速随车速的变化而变化；此时，第二电机补偿因发动机停机减少的功率，
Figure DEST_PATH_IMAGE003
，此时混合动力驱动系统总功率降低，且所有功率来源于电池，不能长时间运行，混合动力驱动系统限制车辆的最高车速，并提示驾驶员将车停靠到安全区域；
Figure 545616DEST_PATH_IMAGE004
是发动机的输出功率，
Figure DEST_PATH_IMAGE005
是第一电机的输出功率；
车辆在混动运行时，当第二电机出现故障，混合动力驱动系统进入第二电机故障跛行模式S3，在模式S3下，调整发动机的控制策略，不再延经济油耗曲线运行，补偿因第二电机故障损失的功率和扭矩，此时，发动机补偿功率
Figure 751119DEST_PATH_IMAGE006
；
Figure DEST_PATH_IMAGE007
是第二电机的输出功率；
Figure 84011DEST_PATH_IMAGE008
是第二电机扭矩；
Figure DEST_PATH_IMAGE009
为第二电机到车轮的传动比，
Figure 350913DEST_PATH_IMAGE010
为发动机到车轮的总传动比，
Figure DEST_PATH_IMAGE011
行星排输出齿轮到车轮的传动比；
Figure 330633DEST_PATH_IMAGE012
为双行星排构件的速比；
第二电机处于随动状态，维持当前车况运行，并发出故障预警，限制最高车速。
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