The invention provides a torque zero-crossing control method and device for a four-wheel-drive electric vehicle. The method comprises the steps of obtaining vehicle operation parameters; torque zero-crossing interval identification is carried out; when the whole vehicle state is in the torque zero-crossing interval, front motor demand torque change data corresponding to the vehicle speed is determined according to a preset positive pre-twist table, and the front motor demand torque is adjusted to the front motor demand torque according to the front motor demand torque change data; selecting a motor torque distribution ratio before and after correction according to a preset torque distribution table when the whole vehicle state is in a torque zero-crossing 2 interval; and distributing the front and rear motor demand torques according to the whole vehicle demand torque, the original front and rear motor demand torque distribution ratio, the corrected front and rear motor demand torque distribution ratio and the original front motor demand torque, and controlling the front and rear motors according to the distributed front and rear motor demand torques. According to the technical scheme, jitter can be reduced in the motor torque zero-crossing control process, and the dynamic response performance of the vehicle can be improved.

    本申请提供了一种四驱电动车辆扭矩过零控制方法及装置。该方法包括:获取车辆运行参数;进行扭矩过零区间识别;在整车状态处于扭矩过零一区间时,根据预置的正预扭表确定车速对应的前电机需求扭矩变化数据,以根据前电机需求扭矩变化数据调整前电机请求扭矩至前电机需求扭矩;在整车状态处于扭矩过零二区间时,根据预置的扭矩分配表选取修正前后电机扭矩分配比;根据整车需求扭矩、原始前后电机需求扭矩分配比、修正前后电机需求扭矩分配比、原始前电机需求扭矩对前后电机需求扭矩进行分配,并按照分配后的前后电机需求扭矩对前后电机进行控制。本申请的技术方案可以在电机扭矩过零控制过程中减少抖动并提高车辆的动力响应性能。


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    Title :

    Torque zero-crossing control method and device for four-wheel-drive electric vehicle


    Additional title:

    四驱电动车辆扭矩过零控制方法及装置


    Contributors:
    LI LIANGHAO (author) / TANG RUYI (author) / HUANG DAFEI (author) / LIU XIAOFEI (author) / TENG GUOGANG (author)

    Publication date :

    2023-06-06


    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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