The invention belongs to the technical field of vehicle torque control, and particularly relates to a whole vehicle acceleration limiting torque control method and device. The method comprises the following steps: firstly, determining an acceleration calculation formula which reflects a relationship among an acceleration calculation value ajsN + 1 of a next period, a torque command request TtqN of a current period, a slope value alpha N of the current period and a vehicle speed uN of the current period; then determining ajsN + 1 by using an acceleration calculation formula, subtracting a current acceleration limit target value aNlimit from the ajsN + 1 to obtain a current acceleration difference aN, and when aN is greater than 0, obtaining TfN according to aN and uN as well as a relationship among aN, uN and current acceleration limit feed-forward torque TfN; and finally, the driver demand torque TdN in the current period is calculated, the TfN is subtracted from the driver demand torque TdN, and a motor torque command request TtqN used for controlling the motor in the current period is determined according to the obtained difference value. According to the method, acceleration limiting during starting of the whole vehicle and acceleration limiting during re-acceleration are achieved, safety risks caused by excessive acceleration during starting of the vehicle are avoided, and operation convenience of a driver is improved.
本发明属于车辆扭矩控制技术领域,具体涉及一种整车加速度限制扭矩控制方法和装置。该方法首先确定体现下一周期的加速度计算值ajsN+1与当前周期的扭矩命令请求TtqN、当前周期的坡度值αN、当前周期的车速uN之间关系的加速度计算公式;然后利用加速度计算公式确定ajsN+1,进而用ajsN+1减去当前加速度限制目标值aNlimit得到当前加速度差值△aN,在△aN>0时,根据△aN和uN,以及△aN、uN与当前加速度限制前馈扭矩TfN之间的关系,得到TfN;最后计算当前周期的驾驶员需求扭矩TdN减去TfN,并根据得到的差值确定用于控制电机的当前周期的电机扭矩命令请求TtqN。本发明实现整车起步加速度限制及再加速时的加速度限制,避免车辆起步加速过猛带来的安全风险并提高驾驶员操作便利性。
Vehicle acceleration limiting torque control method and device
一种整车加速度限制扭矩控制方法和装置
26.07.2024
Patent
Elektronische Ressource
Chinesisch
Motor torque limiting method and device, vehicle control unit and vehicle
Europäisches Patentamt | 2024
|Europäisches Patentamt | 2015
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