The control method for the low-speed torque fluctuation of the electric vehicle comprises the steps that the opening degree of an accelerator pedal of the vehicle and the running speed of the vehicle are obtained, and the running state of the vehicle is judged according to the opening degree of the accelerator pedal and the speed of the vehicle; if the running state of the vehicle is in the transition critical state of the acceleration state and the sliding state, the reverse towing torque and the cogging torque of the vehicle are obtained, and the difference value of the reverse towing torque and the cogging torque is calculated; and the vehicle control unit sends a compensation torque instruction to the motor according to the difference value, so that the motor outputs torque to control the main reduction gear to be kept in a meshing state. The problem that impact abnormal sound is easily caused by motor torque waves when the electric vehicle is at a low speed can be solved, the NVH performance of the electric vehicle can be improved, and the safety of the electric vehicle is improved.
本发明一种电动车低速扭矩波动的控制方法,包括:获取车辆的加速踏板开度和车辆运行的车速,并根据所述加速踏板开度和所述车速判断车辆运行状态;如果所述车辆运行状态处于加速状态与滑行状态的转换临界,则获取车辆的倒拖力矩和齿槽力矩,并计算所述倒拖力矩与所述齿槽力矩的差值;整车控制器根据所述差值对电机发送补偿力矩指令,使所述电机输出力矩控制主减齿轮保持啮合状态。本发明能解决电动车在低速时电机扭矩波易造成撞击异响的问题,能提高电动汽车使用的NVH性能,增加电动汽车的安全性。
Control method for low-speed torque fluctuation of electric vehicle
一种电动车低速扭矩波动的控制方法
01.03.2022
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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