The invention discloses a low-attached road surface driving torque control method for an electric automobile. The method comprises the following steps that real-time information parameters of the automobile are obtained, and a control threshold value of the low-attached road surface driving torque control method is designed; judging whether the current vehicle driving state meets the activation torque control or not; determining a torque correction coefficient IT according to the current wheel speed difference delta V and the vehicle speed V; calculating a torque correction coefficient IC according to the motor angular acceleration omega after activation torque control; determining a final output torque limit value according to the maximum torque fluctuation rate TGrad; torque limitation is output, and whether torque control strategy quitting conditions are met or not is judged. According to the invention, low-attachment road surface driving safety protection under the condition that the TCS is not activated or cannot be activated can be effectively compensated, the risk that the vehicle is out of control is reduced, and the maintenance cost is saved.

    本发明公开了一种电动汽车低附路面行驶扭矩控制方法,包括以下步骤:获取车辆实时信息参数并设计低附路面行驶扭矩控制方法控制阈值;判断当前车辆行驶状态是否满足激活扭矩控制;根据当前轮速差ΔV和车速V,确定扭矩修正系数IT;根据激活扭矩控制后电机角加速度ω,计算扭矩修正系数IC;根据最大扭矩波动速率TGrad确定最终输出扭矩限值;输出扭矩限制,并判断是否满足退出扭矩控制策略条件。本发明能够有效弥补TCS未激活或无法激活的条件下的低附路面行驶安全保护,降低了车辆失控风险,节约了维修成本。


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    Title :

    Low-attachment road surface driving torque control method for electric vehicle


    Additional title:

    一种电动汽车低附路面行驶扭矩控制方法


    Contributors:
    LI YANG (author) / MA CHENGXIANG (author) / HOU CHENGWEI (author)

    Publication date :

    2024-09-06


    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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