关键词: 转向系统油管；疲劳断裂；频率响应；受力分析

Abstract: In order to improve the vehicle steering portability and driving safety, the hydraulic power assisted steering system is widely used in light trucks. The steering oil pipe is the main bearing and transmission component of hydraulic oil, and the failure of the steering oil pipe affects the steering performance of the vehicle. Combined with the actual case of steering oil leakage in a certain model in the market, from the analysis of failure mode performance, potential factor analysis to root cause confirmation, and finally proposed an optimization scheme to analyze the difference of the force model due to the layout and design of the vehicle in different driving conditions. Through the analysis of the system, the experience and ideas for steering system engineers are shared and provided.

Key words: Steering system oil pipe; Fatigue fracture; Frequency response; Force analysis