超过 4536 千克（10000 磅）的车辆的低负荷惯性测功机液压制动器磨损测试程序

[中文适用范围]： 本推荐做法源自 OEM 和 1 级实验室测试，适用于配备液压盘式或鼓式行车制动器的 GVWR 超过 4536 千克（10000 磅）的两轴多用途乘用车@或卡车。在对特定制动器尺寸或在特定测试条件下进行测试之前@审查@同意@并与测试请求者记录任何与测试程序的偏差。此外@最终测试结果的适用标准和被视为显着不同的磨损率需要定义@评估@和适当的文件；特别是因为这将决定是否需要方法 B 测试。本推荐做法不评估或量化其他制动系统特性，例如性能@噪音@抖动@ABS性能@或极端温度或速度下的制动。最低性能要求不属于本推荐实践的一部分。与磨损率和磨损行为相关的最低要求的一致性和通过/失败幅度可以作为项目的一部分与测试请求者协调进行评估。注意：本推荐做法使用 NIST 特别出版物 811 中的单位转换和舍入技术。这是为了确保使用标准转换系数并确定适当的有效数字位数，以确保转换单位的舍入误差 (RE)小于或类似于原始英制或英制单位的 RE。目的 本程序的目的是使用单端惯性测功机测试评估不同制动温度或固定温度下的磨损水平和磨损率，并在对应于低负荷制动的条件下延长磨损周期。 [外文原描述]： This Recommended Practice is derived from OEM and tier-1 laboratory tests and applies to two-axle multipurpose passenger vehicles, or trucks with a GVWR above 4536 kg (10 000 pounds) equipped with hydraulic disc or drum service brakes. Before conducting testing for a specific brake sizes or under specific test conditions, review, agree upon, and document with the test requestor any deviations from the test procedure. Also, the applicable criteria for the final test results and wear rates deemed as significantly different require definition, assessment, and proper documentation; especially as this will determine whether or not Method B testing is needed. This Recommended Practice does not evaluate or quantify other brake system characteristics such as performance, noise, judder, ABS performance, or braking under extreme temperatures or speeds. Minimum performance requirements are not part of this recommended practice. Consistency and margin of pass/fail of the minimum requirements related to wear rates and wear behavior can be assessed as part of the project in coordination with the test requestor. NOTE: This Recommended Practice uses the unit conversion and rounding techniques from the NIST Special Publication 811. This to ensure the use of standard conversion factors and to determine the appropriate number of significant digits to ensure the Rounding Error (RE) of the converted unit is smaller than or similar to the RE of the original English or Imperial unit.