CN106671968B - 混合动力电动车辆及其有效控制变速器的方法 - Google Patents

混合动力电动车辆及其有效控制变速器的方法 Download PDF

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CN106671968B
CN106671968B CN201610803850.4A CN201610803850A CN106671968B CN 106671968 B CN106671968 B CN 106671968B CN 201610803850 A CN201610803850 A CN 201610803850A CN 106671968 B CN106671968 B CN 106671968B
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engine clutch
control period
controller
engine
time
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CN106671968A (zh
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金尚准
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Hyundai Motor Co
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Hyundai Motor Co
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60K6/38—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 driveline clutches
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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
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    • Y10S903/902—Prime movers comprising electrical and internal combustion motors
    • Y10S903/903—Prime movers comprising electrical and internal combustion motors having energy storing means, e.g. battery, capacitor
    • Y10S903/904—Component specially adapted for hev
    • Y10S903/912—Drive line clutch

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

本发明提供了一种当将同时执行换档和发动机离合器释放时提高燃料经济性的变速器控制方法。具有安装在电动机和发动机之间的发动机离合器的并联式混合动力电动车辆包括在第一控制时段期间执行变速器换档的第一控制器和操作发动机离合器并产生发动机离合器释放请求的第二控制器。在确定当已经产生释放请求时的时间在第三控制时段(其是在第二控制时段之前的时段，其中实际换档产生于第一控制时段内)内并且确定直到当开始第二控制时段时的时间为止的剩余时间等于或大于临界时间时，第三控制器在第二控制时段之前允许发动机离合器释放请求释放发动机离合器。

Description

混合动力电动车辆及其有效控制变速器的方法
技术领域
本发明涉及一种混合动力电动车辆和其有效控制变速器的方法，并且更具体地，涉及一种当将要同时执行换档和发动机离合器释放时改善燃料经济性的变速器控制方法和能够执行该方法的混合动力电动车辆。
背景技术
通常，混合动力电动车辆是使用两种类型动力源的车辆，所述动力源主要包括发动机和电动机。近年来，已对混合动力电动车辆进行研究，因为混合动力电动车辆与具有内燃机的车辆相比展现出更高的燃油经济性、更高的动力性能以及更低的废气排放。
混合动力电动车辆可基于其动力传动系以两种行驶模式操作。一种行驶模式是混合动力电动车辆使用电动机驱动的电动车辆(EV)模式，并且另一种是混合动力电动车辆使用电动机和发动机两者一起驱动的混合动力电动车辆(HEV)模式。基于行驶条件，混合动力电动车辆执行模式之间的切换。特别是，在使用具有安装在发动机和变速器之间的电动机和发动机离合器(EC)的并联式或变速器安装电动装置(TMED：transmission mountedelectric device)式混合动力系统的混合动力电动车辆中，在从HEV模式切换到EV模式期间可频繁地同时执行发动机离合器释放和换档。
为了改善换档期间的乘坐舒适性，当产生换档事件时不执行发动机离合器释放控制，并且在完成换档之后执行发动机离合器释放控制。然而，发动机无需保持连接到驱动轴上。具体地，连续地将燃料喷射到发动机中，导致燃料经济性降低。
发明内容
因此，本发明提供了混合动力电动车辆和有效控制其变速器的方法，其基本上消除了由于现有技术的限制和缺点造成的一个或多个问题。本发明的目的是为了提供当将要同时执行换档和发动机离合器释放时能够改善燃料经济性的变速器控制方法和能够执行该方法的混合动力电动车辆。
本发明的其它优点、目的和特征将在随后的说明书中进行部分地陈述，且它们对本领域技术人员而言在仔细阅读随后的内容之后将部分地变得更为显然，或可由实施本发明而习得。通过在书面描述及其权利要求以及附图中具体指出的结构，可实现和获得本发明的目的和其他优点。
为了实现这些目的和其他优点并且根据本发明的意义，如这里所实施和广义描述的，具有安装在电动机和发动机之间的发动机离合器的并联式混合动力电动车辆的控制变速器的方法可包括：开始第一控制时段以执行变速器的换档；在第一控制时段内产生发动机离合器释放请求；在确定当已经产生发动机离合器释放请求时的时间在第三控制时段(其是在第一控制时段内发生实际换档的第二控制时段之前的时段)内并且确定直到当开始第二控制时段时的时间为止的剩余时间等于或大于临界时间时，在第二控制时段之前允许发动机离合器释放请求。
在本发明的另一方面中，具有安装在电动机和发动机之间的发动机离合器的并联式混合动力电动车辆可包括配置成在第一控制时段期间执行变速器的换档的第一控制器、配置成操作发动机离合器和产生发动机离合器释放请求的第二控制器、以及第三控制器，其配置成响应于确定当已经产生发动机离合器时的时间在第三控制时段内(其是在第一控制时段内发生实际换档的第二控制时段之前的时段)并且确定直到当开始第二控制时段时的时间为止的剩余时间等于或大于临界时间，在第二控制时段之前允许发动机离合器释放。
应当理解，上文一般描述和本发明的以下详细描述都是示例性和解释性的，并且旨在对所要求保护的本发明提供进一步的解释。
附图说明
被包括用于提供对本发明的进一步理解并且并入本申请且构成它的一部分的附图阐明了本发明的示例性实施例(多个)并且与说明书一起用于解释本发明的原理。在附图中：
图1是示出了根据本发明的示例性实施例的混合动力电动车辆的动力传动系结构的示例的视图；
图2是示出了根据本发明的示例性实施例的混合动力电动车辆的控制系统的示例的框图；
图3是示出了根据本发明的示例性实施例在换档期间的一般发动机离合器释放过程的示例的视图；
图4A至图4C是示出了每当产生根据本发明的示例性实施例的发动机离合器释放请求时执行发动机离合器释放控制的过程的示例的视图；以及
图5是示出了每当产生根据本发明的示例性实施例的发动机离合器释放请求时执行发动机离合器释放控制的过程的示例的流程图。
具体实施方式
可以理解，如这里所用的术语“车辆”或者“车辆的”或其他类似术语包括一般如包括运动型多功能车(SUV)、公共车辆的客车、卡车、各种商用车辆的机动车辆，包括各种船和舰的船舶，飞机等，并包括混合动力车辆、电动车辆、插入式混合动力电动车辆、氢为动力的车辆和其它替代燃料车辆(例如，来源于非石油资源的其他衍生燃料)。如这里所述，混合动力车辆是具有两个或多个动力源的车辆，例如兼备汽油动力和电动力二者的车辆。
虽然示例性实施例被描述为使用多个单元以执行示例性过程，但可以理解，示例性过程也可由一个或多个模块来执行。此外，可以理解，术语控制器/控制单元是指包括存储器和处理器的硬件设备。存储器经配置成存储模块并且处理器经特别配置成执行所述模块从而执行在下面将进一步描述的一个或多个过程。
另外，本发明的控制逻辑可被实施作为在包含由处理器、控制器/控制单元等执行的可执行程序指令的计算机可读介质上的非暂时性计算机可读介质。计算机可读介质的实例包括但不限于ROM、RAM、光盘(CD)-ROM、磁带、软盘、闪存驱动器、智能卡以及光学数据存储设备。计算机可读介质还可分布在耦合计算机系统的网络中，以便计算机可读介质以分布式方式存储和执行，例如，由远程信息处理服务器或控制器局域网(CAN)。
这里所用的术语仅用于描述具体实施例的目的，并且非旨在限制本发明。如这里所用，单数形式“一”、“一个”和“所述”也旨在包括复数形式，除非上下文另外明确指出。将进一步理解，术语“包括”和/或“包含”，当在本说明书中使用时，列举所陈述的特征、整数、步骤、操作、元素和/或部件的存在，但不排除存在或附加一个或多个其它特征、整数、步骤、操作、元素、部件和/或它们的组。如这里所用，术语“和/或”包括一个或多个相关所列项目的任何和所有组合。
现将详细地参考示于附图的本发明的示例性实施例。这里元件的后缀“模块”和“单元”用于方便描述，并因此可互换使用并且没有任何可区别的含义或功能。
首先，将参考图1对可应用本发明的示例性实施例的混合动力电动车辆的结构进行描述。图1是示出了混合动力电动车辆的动力传动系结构的示例的视图。参考图1，混合动力电动车辆的动力传动系结构可包括具有安装在内燃机(ICE)110和变速器150之间的电动机140和发动机离合器130的并联式混合动力系统。
尤其是，当在启动车辆后接合加速器踏板(例如，压力施加在踏板上)时，电动机140可首先在开放发动机离合器130时使用来自电池的电力驱动，然后来自电动机140的动力可经由变速器15和最终驱动(FD：final drive)160传输到车轮以移动车轮(例如，EV模式)。当随着车辆逐渐加速需要较高驱动力时，起动发电电动机120可经操作以驱动发动机110。
当发动机110和电动机140的旋转速度大约一致时，可锁定发动机离合器130，其结果是，发动机110和电动机140二者都可配置成驱动车辆(例如，从EV模式转变到HEV模式)。当车辆减速时，可开放发动机离合器130，并且可停止发动机110(例如，从HEV模式转变到EV模式)。因此，车辆可配置成使用来自车轮的驱动力通过电动机给电池充电，其被称为制动能量的再生或再生制动。起动发电电动机120可配置成当启动发动机时操作为起动电动机并且在启动发动机后作为发电机。因此，起动发电电动机120可被称为混合起动发电机(HSG)。
用于在使用动力传动系的车辆的行驶模式之间切换的各种控制器之间的相互关系示于图2。图2是示出了可应用本发明的示例性实施例的混合动力电动车辆的控制系统的示例的框图。参考图2，在混合动力电动车辆中，发动机110可由发动机控制单元210操作，起动发电电动机120的扭矩可由电动机控制单元(MCU)220调节，并且发动机离合器130可由离合器控制单元230操作。发动机控制单元210还可被称为发动机管理系统(EMS)。此外，变速器150可由变速器控制单元250操作。如上所述的各种控制器可全部由上级或总控制器操作。
每个控制器都可连接到配置成执行总体模式切换过程的模式切换控制器240从而在模式切换控制器240的控制下在行驶模式切换或换档期间提供发动机离合器控制所需要的信息，或基于来自模式切换控制器240的控制信号执行操作。更具体地，模式切换控制器240可配置成基于车辆的行驶状态确定是否执行模式切换。例如，模式切换控制器240可配置成确定发动机离合器130的开放时间，并且，当开放发动机离合器130时，可配置成执行液压控制(用于湿式EC)或扭矩容量控制(用于干式EC)。此外，模式切换控制器240可配置成确定发动机离合器130的状态(例如，锁定、滑移或打开)，并且可配置成调节当中断燃料喷射到发动机110时的时间。
另外，对于本领域技术人员而言显而易见的是，控制器之间的相互关系和控制器的功能是示例性的，而不由名称限制。例如，模式切换控制器240可经配置使得将除了模式切换控制器240之外的其它控制器中的一个提供相应功能或使得两个或更多个以分立方式提供相应功能。
在下文中，将描述基于车辆的上述结构在换档期间的一般发动机离合器释放过程。图3是示出了在换档期间的一般发动机离合器释放过程的示例的视图。参考图3，当产生用于行驶模式切换的发动机离合器释放请求时，可在在变速器中实际执行换档的换档控制时段之后释放发动机离合器。换句话说，可在已完成换档之后释放发动机和驱动轴之间的连接。当在释放发动机离合器之前中断发动机中的燃料喷射时，由于发动机的摩擦扭矩，驱动力可能会损失。另外，当连续执行发动机中的燃料喷射时，燃料可能会不必要地浪费。
为了防止这样的损耗，本发明的示例性实施例提出了在换档控制时段的开始处预释放发动机离合器的方法，即，在执行实际换档之前(例如，在改变输入到变速器的速度之前)。特别是，本示例性实施例提出了特定控制器确定当同时执行换档控制和EC释放控制时基于换档控制步骤是否以及何时允许发动机离合器释放的方法。可基于换档控制性能不会由于发动机离合器释放导致的转速或冲击/振动的瞬时变化而劣化的状态，确定何时允许发动机离合器释放。更具体地，当产生发动机离合器释放请求时的时间可基于实际换档划分成多个阶段，使得仅在即使当释放发动机离合器时也基本上不影响实际换档时段的步骤处允许发动机离合器释放，并且使得当不允许发动机离合器释放时，在实际换档之后释放发动机离合器。
在本示例性实施例的方面中，配置成确定是否以及何时允许发动机离合器释放的特定控制器可以是模式切换控制器。此外，当产生发动机离合器释放请求时的时间可划分为三个阶段。具体地，每个阶段可划分成1)当未执行实际换档并且实际换档未受影响时的时间、2)当未执行实际换档但实际换档受到影响时的时间以及3)实际换档时段。每个阶段将参考图4A至图4C的曲线图进行描述。图4A至图4C是示出了每当产生根据本发明的示例性实施例的发动机离合器释放请求时执行发动机离合器释放控制的过程的示例的视图。
参考图4A，变速器执行换档的换档控制时段可划分为未执行实际换档的实际换档之前的时段、由于在变速器中离合器开放-滑移-锁定而实际执行换档的实际换档时段以及实际换档之后的时段。当实际换档之前的时段中当产生发动机离合器释放请求时的时间不影响实际换档时，可立即允许发动机离合器释放，由此可在实际换档时段之前释放发动机离合器。尤其是，当实际换档未受影响时的时间可指示当产生发动机离合器释放请求时的时间和当进入实际换档时段时的时间之间的时间等于或大于临界时间的情况。临界时间(其是足以发动机离合器释放不影响实际换档的程度的时间)可基于变速器、发动机和发动机离合器的规格来设定。
如图4B或图4C中所示，当产生发动机离合器释放请求时的时间是当影响实际换档时的时间时，可在实际换档时段之后执行发动机离合器释放。尤其是，当影响实际换档时的时间可指示如图4B中所示的在实际换档之前的时段中产生发动机离合器释放请求时的时间和进入实际换档时段时的时间之间的时间小于临界时间的情况，或如图4C中所示的在实际换档时段内产生发动机离合器释放请求的情况。
在下文中，上述换档控制过程将参考图5的流程图进行描述。图5是示出了每当产生根据本发明的示例性实施例的发动机离合器释放请求时执行发动机离合器释放控制的过程的示例的流程图。参考图5，作为变速器控制器执行换档的结果，可开始换档(即换档控制时段)(S510)。另外，变速器控制器可配置成通知(例如，传输信号指示)模式切换控制器已开始换档。
当来自离合器控制器的发动机离合器释放请求传输到模式切换控制器(S520)时，模式切换控制器可配置成确定当前阶段是否是在实际换档之前的阶段(S530)。响应于确定当前阶段是实际换档之前的阶段，模式切换控制器可配置成确定当前时间是否是当发动机离合器释放影响实际换档时的时间(S540)。此外，响应于确定发动机离合器释放不影响实际换档，模式切换控制器可配置成允许发动机离合器释放(即传输释放许可到离合器控制器)从而在执行实际换档之前释放发动机离合器(S550a)。
另外，当虽然当前阶段是实际换档之前的阶段但当前时间是发动机离合器释放影响实际换档时的时间时，或当在实际换档时段内请求发动机离合器释放时，模式切换控制器可配置成通知离合器控制器不允许发动机离合器释放并且传输指令到离合器控制器以在实际换档段之后释放发动机离合器(S550b)。
在上述说明中，确定是否响应于发动机离合器释放请求允许发动机离合器释放的控制器可以是模式切换控制器，然而，对于本领域技术人员而言显而易见的是，根据本示例性实施例的发动机离合器释放控制方法可由具有相应功能的附加控制器或其他控制器来执行，诸如图2所示的除了模式切换控制器之外的离合器控制器或变速器控制器。
同时，根据本发明的方法可被实现为可写在程序记录介质上并且由计算机读取的代码。计算机可读介质可以是数据以计算机可读方式存储在其中的任何类型的记录设备。计算机可读介质可包括，例如，硬盘驱动器(HDD)、固态硬盘(SSD)、硅磁盘驱动器(SDD)、只读存储器(ROM)、随机存取存储器(RAM)、光盘只读存储器(CD-ROM)、磁带、软盘以及光学数据存储设备。此外，计算机可读介质可以载波的形式来实现(例如，通过因特网传输)。
正如从上面的描述中明显看出，涉及本发明的至少一个示例性实施例的混合动力电动车辆能够更有效地执行换档控制。尤其是，当同时执行发动机离合器释放和换档时可基于换档控制来确定是否释放发动机离合器，从而提高燃料经济性。
应当注意，本发明的效果并不限定于如上所述的本发明的效果，并且本领域的技术人员将从以下描述中清楚地理解本发明的其他未提及的效果。对于本领域技术人员而言显而易见的是，可在不脱离本发明的精神或范围的情况下在本发明中作出各种修改和变化。因此，本发明旨在覆盖在所附权利要求及其等同物范围内的本发明的修改和变体。

Claims (14)

1.一种控制具有安装在电动机和发动机之间的发动机离合器的并联式混合动力电动车辆的变速器的方法，所述方法包括以下步骤：
由控制器开始第一控制时段以执行所述变速器的换档；
由所述控制器在所述第一控制时段内产生发动机离合器释放请求；以及
响应于确定产生所述发动机离合器释放请求的时间在第三控制时段内，并且确定直到第二控制时段开始的时间为止的剩余时间等于或大于临界时间，由所述控制器在所述第二控制时段之前允许所述发动机离合器释放请求以释放所述发动机离合器，所述第三控制时段是在所述第一控制时段内的第二控制时段之前的时段，其中实际换档发生在所述第二控制时段。
2.根据权利要求1所述的方法，还包括以下步骤：
响应于确定产生所述发动机离合器释放请求的时间在所述第三控制时段内并且确定直到所述第二控制时段开始的时间为止的所述剩余时间小于临界时间，由所述控制器阻止所述发动机离合器释放请求以在所述第二控制时段之后释放所述发动机离合器。
3.根据权利要求1所述的方法，还包括以下步骤：
响应于确定产生所述发动机离合器释放请求的时间在所述第二控制时段内，由所述控制器阻止所述发动机离合器释放请求以在所述第二控制时段之后释放所述发动机离合器。
4.根据权利要求3所述的方法，还包括以下步骤：
作为允许所述发动机离合器释放请求的结果，由所述控制器释放所述发动机离合器；以及
由所述控制器中断向所述发动机的燃料喷射。
5.根据权利要求1所述的方法，其中所述发动机离合器释放请求从第一控制器传输到第二控制器，其中，所述第一控制器配置成操作所述发动机离合器，所述第二控制器配置成执行行驶模式切换。
6.根据权利要求1所述的方法，其中所述临界时间基于所述发动机离合器释放是否影响所述实际换档来设定。
7.根据权利要求1所述的方法，其中所述电动机基于所述发动机离合器设置得比所述发动机更靠近驱动轮。
8.一种具有安装在电动机和发动机之间的发动机离合器的并联式混合动力电动车辆，所述混合动力电动车辆包括：
第一控制器，其配置成在第一控制时段执行变速器的换档；
第二控制器，其用于控制所述发动机离合器并产生发动机离合器释放请求；以及
第三控制器，其配置成响应于确定产生所述发动机离合器释放请求的时间在第三控制时段内并且确定直到第二控制时段开始的时间为止的剩余时间等于或大于临界时间，在所述第二控制时段之前允许所述发动机离合器释放请求以释放所述发动机离合器，所述第三控制时段是在所述第一控制时段内的第二控制时段之前的时段，其中实际换档发生在所述第二控制时段。
9.根据权利要求8所述的混合动力电动车辆，其中，响应于确定产生所述发动机离合器释放请求的时间在所述第三控制时段内并且确定直到所述第二控制时段开始的时间为止的所述剩余时间小于临界时间，所述第三控制器配置成阻止所述发动机离合器释放请求以在所述第二控制时段之后释放所述发动机离合器。
10.根据权利要求8所述的混合动力电动车辆，其中，响应于确定产生所述发动机离合器释放请求的时间在所述第二控制时段内，所述第三控制器配置成阻止所述发动机离合器释放请求以在所述第二控制时段之后释放所述发动机离合器。
11.根据权利要求8所述的混合动力电动车辆，还包括：
第四控制器，其配置成响应于允许所述发动机离合器释放请求而释放所述发动机离合器，中断向所述发动机的燃料喷射。
12.根据权利要求8所述的混合动力电动车辆，其中所述发动机离合器释放请求从所述第二控制器传输到所述第三控制器，其中所述第三控制器配置成执行行驶模式切换。
13.根据权利要求8所述的混合动力电动车辆，其中所述临界时间基于所述发动机离合器释放是否影响所述实际换档来设定。
14.根据权利要求8所述的混合动力电动车辆，其中所述电动机基于所述发动机离合器设置得比所述发动机更靠近驱动轮。
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