The invention provides a hybrid power start-stop control method and system.The method comprises the steps that in the starting process of an engine, compensation torque needed by the engine in the starting process is calculated according to power parameters of the engine and the rotating speed change rate of the engine, and the compensation torque is provided for the engine through a compensation motor; controlling the engine to stop supplying fuel after reaching the target rotating speed; according to the working condition information of the automobile, torque control is conducted on an engine through a compensation motor, and the engine is controlled to keep a stable rotating speed; in the shutdown process of the engine, the engine is controlled to be kept at a target rotating speed through the compensation motor so as to enter a shutdown auxiliary mode; and in the shutdown auxiliary mode, when the engine is maintained at the target rotating speed for a preset time and does not receive the power request within the preset time, the engine is controlled to stop working. The technical problems that in the prior art, noise is high when an engine of a hybrid electric vehicle is started and stopped, and better NVH implementation is not facilitated can be solved.

    本发明提供了一种混合动力启停机控制方法及系统,该方法包括:在发动机的启动过程中,根据发动机的动力参数与发动机的转速变化率,计算发动机在启动过程所需的补偿扭矩,通过一补偿电机向发动机提供补偿扭矩,控制发动机到达目标转速后停止供应燃料;根据汽车的工况信息,通过补偿电机对发动机进行扭矩控制,控制发动机保持一稳定转速;在发动机的停机过程中,通过补偿电机控制发送机保持在一目标转速以进入停机辅助模式;在停机辅助模式下,当发动机在目标转速维持一预设时间后且在预设时间内未收到动力请求时,控制发动机停止工作。本发明能够解决现有技术中混合动力汽车普遍存在发动机启停机时噪音大,不利于更好的NVH实现的技术问题。


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    Title :

    Start and stop control method and system for hybrid electric vehicle


    Additional title:

    一种混合动力汽车启停机控制方法及系统


    Contributors:
    LI KECHENG (author) / WEI LI (author) / PENG CHAO (author) / XU ZIFENG (author)

    Publication date :

    2022-05-31


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    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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