电动汽车坡道单轴制动稳定性与再生制动极限控制研究

在满足制动稳定性和ECE法规等条件下,尽量增大电动汽车驱动轴上的制动力比例,甚至仅由再生制动力矩进行单轴制动,是实现理想复合制动系统、提高制动能量回收效率的根本途径。电动汽车驱动形式和轴荷分布会影响到其坡道单轴制动行驶的纵向稳定性。对汽车上、下坡过程单轴制动4种工况下出现抱死、纵翻和纵滑的临界条件进行分析,得到电动汽车坡道单轴制动稳定性条件和再生制动强度的极限边界。

The Study on Electric Vehicle Stability of Grade Single Axle Braking and Regenerative Braking Torque Limitation Control

It is a basic way to realize the ideal composite braking system and improve the efficiency of the braking energy recovery on the premise of meeting the braking stability requirements and ECE regulations etc by increasing the braking force proportion on the drive shaft of electric vehicles as much as possible,even single axis braking with the regenerative braking torque.The driving type and axle load distribution of the electric vehicles will influence the single axial braking stability of the ramp driving.And four situations were analyzed including single axial brake in uphill and downhill process involving lock,longitudinal turn and longitudinal sliding etc.critical conditions.And stability conditions of the single axle ramp braking and regenerative braking limitation were achieved,which would provide a theory reference to formulate the coordinated control algorithm of the composite braking system.