关键词: 电动微型车；不足转向度；悬架结构；侧倾梯度

Abstract: In order to improve the problem of the lack of understeer for electric mini-vehicle based on the front drive chassis platform, this paper analyzes the generation mechanism and influencing factors of the understeer of the vehicle, combines the structural characteristics of the electric mini-vehicle suspension, proposes optimization measures from the aspects of hard points, elastic parts, bushings, etc., meanwhile builds the vehicle dynamics simulation model, and comprehensively evaluates the impact of the optimization measures on the understeer and roll gradient with the help of the vehicle simulation. The results show that the optimization measures can improve the understeer degree of the mini-vehicle.

Key words: Electric mini-vehicle; Understeer; Suspension structural; Roll gradient