The invention discloses an engine starting method and system, a controller and a hybrid electric vehicle, and the method comprises the steps: controlling a low-voltage storage battery to supply power to a driving motor when a low-voltage engine starting condition is met, so that the driving motor stores energy; and when the preset condition is met, the driving motor is controlled to release electric energy to the starting generator, so that the starting generator operates to start the engine. Energy released by the driving motor is used for supplying power to the starting generator, so that enough energy is provided for starting the generator, and then the engine is started, so that when a high-voltage battery pack and the like of the hybrid electric vehicle fail and the energy of the high-voltage battery pack cannot be used, the engine can still be started smoothly, and the vehicle runs normally; the reliability of the vehicle is improved.

    本发明公开了一种发动机启动方法、系统、控制器和混合动力汽车,该方法包括:当满足低压启动发动机的条件时,控制低压蓄电池为驱动电机供电,以使驱动电机储能;当达到预设条件时,控制驱动电机向启动发电机释放电能,以使启动发电机运行以启动发动机。本发明利用驱动电机释放的能量为启动发电机供电,从而有足够的能量来启动发电机,进而启动发动机,使得混合动力汽车在高压电池组等发生故障,无法使用高压电池组的能量时,依旧可以顺利启动发动机,使车辆正常行驶,提高车辆的可靠性。


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    Title :

    Engine starting method and system, controller and hybrid electric vehicle


    Additional title:

    发动机启动方法、系统、控制器和混合动力汽车


    Contributors:
    JIANG LI (author) / XING HUAFENG (author) / ZHOU SHENGHUI (author) / WANG CHUNSHENG (author) / SHI SHANSHAN (author)

    Publication date :

    2024-07-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F02N STARTING OF COMBUSTION ENGINES , Anlassen von Brennkraftmaschinen / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion



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