The invention provides a vehicle working mode switching method and a vehicle working mode switching system of a hybrid electric vehicle. The method comprises the steps of receiving a mode switching control signal and a clutch closing control signal sent by a vehicle controller when the vehicle is required to be switched to a parallel mode from a series mode; sending a mode switching in-progress marking signal to the vehicle controller; controlling an ISG motor to work in a rotation speed control mode, and adjusting the speed of the ISG motor by taking the rotation speed of a drive motor as the target; controlling the ISG motor to work in an idle mode; controlling the clutch to be combined; sending a clutch closed state signal to the vehicle controller. The vehicle working mode switching method and the vehicle working mode switching system of the hybrid electric vehicle have the advantages that the technical problems of long interruption time of power and great wear of the clutch in mode switching caused by a fact that rotation speeds of the ISG motor and the drive motor are synchronized through a sliding membrane of the clutch in mode switching of the existing hybrid electric vehicle are solved, and the active speed adjusting process of the ISG motor and the drive motor is added before the clutch is combined, so that the mode switching time is shortened and the smoothness in the process of mode switching is improved.


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    Title :

    Vehicle working mode switching method and system of hybrid electric vehicle and transmission control unit


    Contributors:
    MIAO ZHUANG (author) / KONG LING AN (author)

    Publication date :

    2015-08-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    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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