关键词: 电动车；后悬架冲击；残余抖动；设计优化

Abstract: In order to improve the rear suspension impact residual jitter problem of an electric vehicle, the vibration pattern of the impact residual jitter was measured by sensors, and the structure and stiffness of the rear subframe bushings and drive motor mounts were redesigned from the perspective of reducing the impact energy and optimising the vibration mode. After repeated exploration, the problem of residual jitter of the rear suspension of this model was successfully solved. In addition, based on the summarisation of the process test data and the subjective driving experience, a correspondence between the subjective evaluation and the objective test data was also established, which provides an engineering reference for the design optimisation and problem analysis of the drive motor- suspension system impact residual jitter problem of the same type of arrangement design.

Key words: Electric vehicle; Rear suspension shock; Residual jitter; Design optimisation