Abstract: Due to the bending characteristics determined by the material, the minimum clearance requirements with surrounding parts on the vehicle, and the extreme motion trajectory of the suspension and steering system, etc., the automobile brake hose may meet dynamic and static interference, excessive involvement, excessive bending fatigue and other problems, which leads to hose wear, fatigue aging, brake fluid leakage, even the risk of brake failure. Through the structure and layout design check of the static end and the moving end of the brake hose based on IPS and three-dimensional software, the transformation of the bending path of the brake hose in the vehicle state to the straight pipe manufacturing of the brake hose in the production state was realized, and the reasonable design of the brake hose path was ensured to avoid the risk of brake failure caused by dynamic and static interference, excessive involvement and excessive bending. This will also form the design process of the brake hose and guide the robust routing design and optimization of the brake hose.

Key words: Brake hose; IPS; Bending radius; Slackness; Torsion resistance; Routing design

摘要： 汽车制动软管由于受其自身材料特性决定的弯曲特性，及在整车上受与周边部件的最 小间隙要求、悬架及转向系统的极限运动轨迹等因素影响，可能带来动静态干涉、过度牵扯、 过度弯曲疲劳等问题导致管壁磨损、疲劳老化、制动液渗漏，出现制动失效风险，通过基于 IPS 和三维软件的制动软管的静态端和运动端的结构及布置设计校核，实现整车状态下制动软 管弯曲路径到生产状态下的制动软管直管制造的转化，确保通过对制动软管路径的合理设计， 达到规避动静态干涉、过度牵扯与过度弯曲带来的制动失效风险，形成制动软管的设计流程， 指导制动软管的合理路径设计与优化。

关键词: 制动软管；IPS；弯曲半径；松弛度；扭曲度；路径设计