CN106232965B - 用于控制热力发动机的停机的方法 - Google Patents

用于控制热力发动机的停机的方法 Download PDF

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CN106232965B
CN106232965B CN201580019742.1A CN201580019742A CN106232965B CN 106232965 B CN106232965 B CN 106232965B CN 201580019742 A CN201580019742 A CN 201580019742A CN 106232965 B CN106232965 B CN 106232965B
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vehicle
clutch
speed changer
opening
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CN106232965A (zh
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Y·佩迪永
B·诺丁
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New H Power Transmission System Holdings Ltd
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Renault SAS
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    • B60W30/18009—Propelling the vehicle related to particular drive situations
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    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
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    • F02D41/022—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the clutch status
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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    • F02D41/04—Introducing corrections for particular operating conditions
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
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    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W2050/0001—Details of the control system
    • B60W2050/0019—Control system elements or transfer functions
    • B60W2050/0042—Transfer function lag; delays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
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    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/10—Accelerator pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/02—Clutches
    • B60W2710/021—Clutch engagement state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
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    • B60W2710/00—Output or target parameters relating to a particular sub-units
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    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0616—Position of fuel or air injector
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
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    • B60W30/00—Purposes 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
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/181—Preparing for stopping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F02D2250/00—Engine control related to specific problems or objectives
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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    • F02N2300/00—Control related aspects of engine starting
    • F02N2300/30—Control related aspects of engine starting characterised by the use of digital means
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Abstract

用于控制车辆动力传动系的方法，该车辆动力传动系包括热力发动机，该热力发动机通过离合器来连接至该车辆的变速器，该离合器被变速器计算器(ATCU)控制在该变速器的打开位置与关闭位置之间，该变速器计算器与热力发动机计算器(ECU)交换信息，其方式使得当该车辆行驶时关闭该发动机的空气阀瓣并且使该发动机与该变速器断开连接，其特征在于，该热力发动机的停机相对于该离合器(E)的打开是提早的，其方式使得所述打开发生在该发动机的空气阀瓣(V)关闭的同时。

Description

用于控制热力发动机的停机的方法
技术领域
本发明涉及对动力传动系(PT)、尤其是车辆动力传动系的控制，该动力传动系由与自动或自动化变速器相关联的至少一个热力发动机和可能的电动牵引机器形成。
更确切地，本发明涉及一种用于控制车辆动力传动系的方法，该车辆动力传动系包括热力发动机，该热力发动机通过离合器来连接至该车辆的变速器，该离合器被变速器计算机控制在该变速器的打开位置与关闭位置之间，该变速器计算机与该热力发动机的计算机交换信息，从而当该车辆运动时关闭该发动机的空气阀瓣并且使该发动机与该变速器断开连接。
背景技术
本发明优选但并非排他性地适用于配备有自动发动机停止和处于停顿状态时重新起动的功能(停止和起动)并且配备有当车辆运动时变速器断开连接的功能(滑行停止或航行)的任何车辆。这种车辆可以有利地配备有整合在混合PTG中的自动或自动化变速器。
在很多车辆中存在的停止和起动(S&S)系统显著地增加了在行程过程中热力发动机停止和重新起动的次数。在一些被称为“微混合动力”的应用中，增加的目标电力机器使之可以额外地引入新的功能，这些新的功能旨在通过只要对于牵引不再存在任何需求就马上停止发动机(包括当车辆在运动时)来进一步减少燃料消耗。这些新的控制策略还导致发动机停机和重新起动的次数显著增加，这在这种情况下几乎为三倍。在这种车辆的情况下，最重要的是，热力发动机的停机和重新起动阶段对于车辆的使用者(即，驾驶者和乘客)是几乎感觉不到的。
发明内容
本发明旨在为配备有停止和起动功能并且受益于滑行停止或航行功能的车辆改善发动机停机的品质，其中当车辆在运动时变速器断开连接。
通过这个目的，本发明提出热力发动机在车辆运动时的停机发生在离合器的打开之前，使得在发动机的空气阀瓣关闭的同时离合器打开。
变速器的计算机优选地在第一时刻将消息发送至发动机的计算机，从而使离合器的打开和发动机阀瓣的闭合同步在第一时刻之后的第二时刻。
附图说明
通过阅读对参照附图提供的本发明的非限制性实施例的以下描述将更好地理解本发明，在附图中：
-图1示出了当车辆停止时对于发动机的停机的准备顺序，并且
-图2示出了当车辆运动时对于发动机的停机的准备顺序。
具体实施方式
为了提供高品质的发动机停机，其中由驾驶者感觉到振动的显著减少，必须使空气阀瓣的闭合与喷射的中断同时进行。然而这两个致动器的动态不相同：在关闭的命令与空气阀瓣的实际关闭之间有300ms(毫秒)，而喷射几乎瞬时中断。因此必须在中断喷射的命令之前提供关闭阀瓣的命令。
为了在车辆停止时准备发动机的停机，其中车辆的运动链打开(离合器打开)并且燃料喷射被设定成维持空转速度，操作的顺序可以对应于图1中的顺序，该图(自上而下)示出了发动机速度ω、离合器状态E、发动机的空气阀瓣的控制CdV、空气阀瓣的状态V、和喷射燃料的量Qinj根据时间的变化。
离合器在运行过程中不改变状态，因为其保持打开并且预先在t1时命令空气阀瓣的闭合，燃料的喷射Qinj维持在其空转水平处直到(在t1之后的)t2，这是发动机的空气阀瓣关闭的时间。因此使得这两个事件同时发生，从而使发动机的停止几乎感觉不到。在关闭空气阀瓣的请求之后维持燃料喷射，从而使所述喷射与空气阀瓣的实际闭合同时发生。
如上表明，通过滑行停止或航行功能，当对于牵引不再存在任何需求时，在车辆运动时可以自动触发发动机的停止和变速器的打开。发动机因此可以在车辆运动时停止，运动链关闭并且喷射中断。因为离合器E关闭，仍由车辆的惯性确保发动机的旋转。离合器E必须打开，从而使发动机与运动链分离。必须使空气阀瓣V的闭合与离合器E的打开同时发生(同时保持喷射中断)。离合器的打开的动态(～100ms)也比空气阀瓣V的闭合更快。必须提前命令这个闭合。在两个计算机之间引入了与变速器的即将打开相关的新的信息交换。除了关于离合器E的状态(打开/关闭)的信息，在这两个计算机之间传输的信号包括关于变速器的即将打开的信息。
由图2展示了用于停机以控制PTG的准备顺序，该PTG包括热力发动机，该热力发动机通过离合器来连接至该车辆的变速器，该离合器被变速器计算机ATCU控制在该变速器的打开位置与关闭位置之间，该变速器计算机与该热力发动机的计算机ECU交换信息。
这个顺序被构建成能够在车辆运动时中断喷射Qinj、关闭空气阀瓣V、并且使发动机与变速器断开连接。在t0时，车辆在运动中，运动链关闭，并且喷射已经被中断。ACTU在t1时将消息发送至ECU，从而使离合器的打开和阀瓣V的闭合同步在t2。在离合器的打开之前，由ACTU在t1时将控制信号发送至ECU，从而警告ECU离合器即将打开并且通过瞬时地触发空气阀瓣的闭合来准备发动机的停机。ACTU然后命令离合器的打开。最后，在t2时，用于离合器E的状态的信号与空气阀瓣的关闭同时地标记其打开。总之，t1标记空气阀瓣的闭合的触发和由ACTU对ECU的警告，从而使离合器的打开与空气阀瓣的闭合同步。t2标记空气阀瓣的闭合和离合器的打开。由ACTU在t1与t2之间将打开离合器的请求发送至离合器。
在离合器的打开之前实施热力发动机的停机，使得离合器的打开与发动机的空气阀瓣的闭合同时发生。在t2时，变速器与发动机断开连接。发动机逐渐停机。如果在顺序开始时发动机速度处于空转速度，则其从标记变速器与发动机的断开连接的t2开始逐渐下降至零。
总之，本发明提出在打开离合器之前使发动机停机，从而提供变速器的高品质的滑行停止或航行功能，其中当喷射已经中断时，变速器在车辆运动时以小的振动或声音断开连接。如果，相反，当车辆已经停止(其中其变速器打开(停止和起动功能))时发动机的停机被触发，则在关闭空气阀瓣的请求之后维持燃料喷射，从而使所述喷射的中断与阀瓣的闭合同时发生。

Claims (4)

1.一种用于控制车辆动力传动系的方法，该车辆动力传动系包括热力发动机，该热力发动机通过离合器来连接至该车辆的变速器，该离合器被变速器计算机(ATCU)控制在该变速器的打开位置与关闭位置之间，该变速器计算机与该热力发动机的计算机(ECU)交换信息，其特征在于，为了当该车辆运动时在该离合器打开之前使该发动机停机，将运动链关闭并且中断喷射，该变速器的计算机(ACTU)在第一时刻(t1)将消息发送至该发动机的计算机(ECU)，从而使该离合器的打开和该发动机的空气阀瓣(V)的闭合同步在第一时刻(t1)之后的第二时刻(t2)。
2.如权利要求1所述的控制方法，其特征在于，在第一时刻(t1)与第二时刻(t2)之间将打开的请求发送至该离合器(E)。
3.如权利要求1或2所述的控制方法，其特征在于，当对于牵引不再存在任何需求时，在车辆运动时自动触发该发动机的停机和该变速器的打开。
4.如权利要求1或2所述的控制方法，其特征在于，当该车辆停止时为了准备该发动机的停机，其中该车辆的运动链打开并且燃料的喷射(Qinj)被设定成维持空转速度，在请求关闭该空气阀瓣(V)后将燃料的喷射维持成使所述喷射的中断与该空气阀瓣的闭合同时发生。
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