The invention discloses a pure electric four-wheel drive torque distribution control method and system, and the method comprises the steps: obtaining a current driving mode of a target vehicle and various driving parameters in the current driving mode, according to the current driving mode and the various driving parameters, torque required by a driver and dynamic vertical loads of a front axle and a rear axle are obtained through calculation; obtaining a road adhesion coefficient according to the front and rear axle dynamic vertical load, and obtaining a road adhesion level corresponding to the current driving model according to the road adhesion coefficient; calling a demand torque correction strategy corresponding to the road surface attachment grade from a preset database according to the road surface attachment grade so as to obtain a corrected driver demand torque according to the demand torque correction strategy, and calculating front and rear axle torques of a target vehicle according to the corrected demand torque, torque distribution is carried out according to the target vehicle front and rear axle torques; and front and rear axle torque distribution is realized by integrating road surface and vehicle states.

    本发明公开了一种纯电动四驱车扭矩分配控制方法及系统,所述方法包括,获取目标车辆的当前驾驶模式以及在当前驾驶模式下的多种行驶参数,以根据所述当前驾驶模式和所述多种行驶参数计算得到驾驶员需求扭矩、前后轴动态垂向载荷;根据所述前后轴动态垂向载荷获取路面附着系数,并根据所述路面附着系数获取与所述当前驾驶模型对应的路面附着等级;根据所述路面附着等级从预设数据库中调取与所述路面附着等级对应的需求扭矩修正策略,以根据所述需求扭矩修正策略获取修正后的驾驶员需求扭矩,并根据所述修正后的需求扭矩计算目标车辆前后轴扭矩,并以目标车辆前后轴扭矩进行扭矩分配;实现了综合路面和车辆状态进行前后轴扭矩分配。


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    Title :

    Torque distribution control method and system for pure electric four-wheel drive


    Additional title:

    一种纯电动四驱车扭矩分配控制方法及系统


    Contributors:
    ZHANG WEIPING (author) / CAI SONG (author) / HU SONGHUA (author) / YOU DAOLIANG (author)

    Publication date :

    2024-07-05


    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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