Abstract: Objective Through the car brake vertical sliding friction tests under different conditions， a series of friction coefficients affected by different factors are obtained. Thereby， the range of  friction coefficients is reduced， and the accident reconstruction accuracy is improved. Methods An orthogonal test method is introduced into the automobile brake vertical sliding friction test. Through range analysis， the impact of various factors on the friction coefficient is determined， and the auto brake friction coefficient is calculated. Results The method to use amended friction coefficients is proposed. With this method， the reference value scope of friction coefficients is reduced， and the accuracy of accident reconstruction is raised. Conclusion In accident reconstruction， the accuracy could be effectively improved by selecting proper automobile brake friction coefficients according to the proposed method.

Key words: automobile brake vertical sliding friction, orthogonal test, accident reconstruction

摘要： 目的 通过进行不同因素条件下的汽车制动纵滑摩擦试验，得到不同因素下的摩擦系数，缩小摩擦系数参考值范围，提高事故再现精度。方法 在制动纵滑摩擦试验中引入正交试验方法，通过极差分析确定不同因素对摩擦系数的影响程度，对汽车摩擦系数的选取进行可靠计算。结果 提出了摩擦系数修正值的使用方法，有效减小摩擦系数参考值的范围，提高事故再现精度。结论 事故再现中，通过试验研究方法，准确地选取汽车制动摩擦系数，有效提高了事故再现的精度。

关键词: 汽车制动纵滑摩擦系数, 正交试验, 事故再现