基于联合控制的汽车驱动防滑系统

Anti-slip regulation system of vehicle based on combination control

为提高前轮驱动车辆在低附着或对开路面上的加速性能,设计了基于节气门与制动干预联合控制的驱动防滑系统.车速较低时选择前后轮速差作为ASR控制量,车速稍高时选择驱动轮滑转率作为ASR控制量.应用扭矩传感器测试了低附着路面的最佳滑转率,设计了基于车轮滑转程度的ASR工况识别方法,开发了针对低附着和对开路面的节气门与制动干预联合控制逻辑,进行了基于捷达GTX轿车的实车试验.试验结果表明,该系统控制逻辑合理,能够对工况做出准确识别,车速较低时将前后轮速差控制在7 km/h内,车速稍高时将驱动轮滑转率控制在20%附近,提高了车辆的加速性能.

In order to improve the acceleration performance of front-wheel driving vehicles on both low adhesion and bisectional roads,an anti-slip regulation（ASR） system based on the combination control of both throttle and braking interference was designed.At lower vehicle velocities,the velocity difference between front and rear wheels was chosen as ASR control variable.At slightly higher vehicle velocities,the slip ratio of driving wheels was selected as ASR control variable.A torque sensor was used to test the optimum slip ratio on low adhesion road,and the identification method for the operating conditions of ASR based on the slip degree of vehicle wheels was designed.In addition,the combination control logic of throttle and braking interference on both low adhesion and bisectional roads was developed.The real vehicle tests based on JETTA GTX car were carried out.The results show that the developed system control logic is reasonable,and can perform accurate identification for operating conditions.Moreover,the velocity difference between front and rear wheels can be controlled within 7 km/h at lower vehicle velocities,and the slip ratio of driving wheels can be controlled within about 20% at slightly higher vehicle velocities.And thus the acceleration performance of vehicles gets improved.