四轮驱动电动汽车轴间驱动力和制动力分配  

Driving and braking force distribution between front and rear axles for 4WD electric vehicle

作　　者：李洋[1] 张建伟[1] 郭孔辉[1] 武冬梅[1] 

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130022

出　　处：《吉林大学学报（工学版）》2015年第3期703-710,共8页Journal of Jilin University:Engineering and Technology Edition

基　　金：'973'国家重点基础研究发展计划项目(2011CB711201);国防基础科研项目(B2220110006)

摘　　要：从提高车辆操纵稳定性的角度出发,根据轮胎力的摩擦圆原理,以前、后轴车轮同时达到附着极限为目标,分析得到前、后轴驱动力和制动力的理想分配关系,并对不同分配方式下的操纵稳定性进行了仿真分析。理论分析和仿真结果表明:本文研究得到的理想分配方法,一方面可以使车辆在保证当前纵向加速度的前提下,最大限度地提高车辆的侧向稳定裕度;另一方面车辆转弯半径随纵向加速度的变化最小,具有良好的操纵性能。同时这种分配方法计算简单,对车辆状态信息依赖程度小,易于在实际控制系统中应用。In order to improve the vehicle dynamic stability, the driving and braking force distribution between the front and rear axles for 4WD electric vehicle is investigated. According to the friction circle of tyre force, the ideal force distribution ratio is obtained, at which the wheels of the front and rear axles reach the adhesion limit simultaneously when the vehicles operate at various conditions. The vehicle handling stability under different distribution methods is analyzed by simulation using 4WD vehicle model. Simulation and theoretical analysis results show that the idea distribution method proposed in this work can improve utmost the lateral stability of the vehicle under the premise of ensuring the current longitudinal acceleration. In addition, for 4WD electric vehicles, the change of turning radius with longitudinal acceleration is minimized and the vehicles have the best maneuverability. Furthermore, the ideal distribution method is simple in calculation and relies little on the vehicle state information, so is easy for application in real vehicles.

关 键 词：车辆工程 轴间力矩分配 操纵稳定性 四轮驱动 电动汽车 

分 类 号：U461.6[机械工程—车辆工程]