速度闭环控制在提升电动车坡道驾驶性的应用

The Application on Speed Closed-loop Control in Promotion of Electric Vehicle’s Drivability

本文提出了一种通过控制速度闭环提升纯电动汽车坡道驾驶性的方法。该方法解决未配备液压辅助功能的电动车在坡道上溜坡的问题。通过对车辆状态的检测,利用电机低速大扭矩的特点,控制电机保持零转速,可以实现电动汽车的坡道辅助和自动驻车功能,通过此方法可以改善电动汽车坡道的驾驶性,经过实车验证,此方法效果明显。

Represent a way to improve the drivability of EV on the slope by the speed closed-loop control. It aims at solving the slip-back problem on the EV without hydraulic assistance. By detecting the status of vehicle, control the motor to keep zero speed using the motor with low speed high torque, to achieve hill assistance and auto hold on vehicle. According to this way, the drivability of EV on the slope is improved. This method is proved to be obviously affection after verification in vehicle.