基于K&C试验台的扭力梁与多连杆悬架研究

以某新旧两款商务车为研究对象,该两款车型后悬架分别采用扭力梁式悬架与多连杆式独立悬架,利用KC试验台获取其悬架系统的特性参数,对比分析平行轮跳试验结果中的车轮外倾角以及车轮前束角的差异和特点,然后基于整车基本数据使用汽车仿真软件Carsim分别建立整车模型,进行转向盘转角阶跃输入仿真,并通过整车侧向加速度与横摆角速度的变化来分析两种不同的后悬架对这款车型整车操纵稳定性的影响。结果表明,相对于扭力梁式后悬架,多连杆式后独立悬架能够加快稳态响应,减小谐振幅度,而且在特殊工况下,侧倾现象明显更小,响应速度更快。

Research on Torsion Beam and Multi-link Suspension Based on K&C Test Rig

Taking the new and old MPVs (multi-purpose vehicles) as the research objects, and the two vehicles use torsion beam suspension and multi-link independent suspension as their rear suspension, respectively. The characteristic parameters of suspension system were obtained based on the K&C (kinematic and compliance) test rig. Compare and analyze the difference between the wheel camber angle and the wheel toe angle got from the parallel wheel jump test. Then Carsim vehicle model was established based on the basic data of vehicles. Steering wheel angle was simulated by step input. Effect of two different rear suspensions on the vehicle handling stability was analyzed by the changes in vehicle lateral acceleration and yaw rate. The results indicate that compared with the torsion beam rear suspension, the multi-link rear independent suspension can speed up the steady-state response, reduce the resonance amplitude. Especially in special conditions, it shows much less roll and faster response obviously.