摩擦系数是汽车制动衬片质量好坏的重要指标之一,制动衬片的制动效果受热环境、水环境影响较大。本文用定速式摩擦试验机对高温200℃下测试的摩擦系数值给出测量不确定度评定,其他温度点的不确定度评定可参考本文的方法。 Friction coefficient is one of the important indexes of automobile brake lining quality. The braking effect of brake lining is affected by the hot environment and water environment. In this paper, constant speed friction test machine for high temperature 200 ℃ under the test friction coefficient value given measurement uncertainty, the uncertainty of other temperature points assessment can refer to the method of this article.