The invention relates to a pure electric vehicle control method, in particular to a four-wheel drive control method for a pure electric vehicle with dual-drive bridge structure. The problem that according to an existing four-wheel-drive control method for the pure electric vehicle with the dual-drive bridge structure, output torque configuration is unreasonable is solved. According to the control method, the working state and the output torque of the front and rear drive systems are reasonably configured, a more flexible and refined four-wheel drive mode is achieved, and meanwhile low power consumption of the electric automobile is guaranteed. When the rotating speed difference of the front wheel and the rear wheel is larger than or equal to 2.5 km/h, a front wheel slip limiting state is started; and in a front wheel slip limiting state, torque redistribution of front and rear motors is performed through a linear interpolation method. The whole vehicle driving mode is divided into an ECO mode, a NORMAL mode and an SPORT mode, and the three modes comprise respective accelerator pedal MAPs and respective brake pedal MAPs; and the driving mode state of the last cycle needs to be stored after power-on again.

    本发明涉及纯电动汽车控制方法,具体为双驱动电桥架构纯电动汽车四驱控制方法。解决现有双驱动电桥架构纯电动汽车四驱控制方法输出扭矩配置不合理的问题。该控制方法合理地配置前后驱动系统的工作状态和输出扭矩,实现更灵活和精细化的四驱方式,同时保证电动汽车的低电耗。根据前轮和后轮的转速差进行限滑判断:当前轮与后轮转速差大于等于2.5km/h时,进入前轮限滑状态;在前轮限滑状态,通过线性插值法进行前后电机的扭矩再分配。整车驾驶模式分为:ECO,NORMAL,SPORT三种模式,三种模式有各自的加速踏板MAP,和各自的刹车踏板MAP;重新上电后需要保存上一循环的驾驶模式状态。


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    Title :

    Four-wheel-drive control method for pure electric vehicle with dual-drive bridge structure


    Additional title:

    双驱动电桥架构纯电动汽车四驱控制方法


    Contributors:
    HE RISHENG (author) / GONG QINGWEI (author) / WU BEIBEI (author)

    Publication date :

    2021-06-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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