1.1 本试验方法涵盖了评估柴油机油性能特性的发动机试验程序，包括未涂覆活塞环和缸套之间的粘合磨损。这种测试方法通常被称为DD13刮伤测试。 1.2 以国际单位制表示的数值应视为标准。本标准中不包括其他计量单位。 1.2.1 例外-- 如果没有直接的SI等效物，例如螺纹单位、国家管道螺纹/直径、管道尺寸和单一来源供应设备规范。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 看见 附件A2 具体的安全预防措施。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 5.1 该试验方法是为了评估涡轮增压和中冷四循环柴油发动机机油的缸套磨损和环损性能而制定的，该发动机配备了EGR、无涂层顶环并使用超低硫柴油。测试前后，从废油分析、操作数据和部件测量中获得结果。 5.2 当遵循程序的所有细节时，测试方法可用于发动机机油规格验收。

1.1 This test method covers an engine test procedure for evaluating diesel engine oils for performance characteristics, including adhesive wear between an uncoated piston ring and cylinder liner. This test method is commonly referred to as the DD13 Scuffing Test. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.2.1 Exception— Where there is no direct SI equivalent, such as the units for screw threads, National Pipe Threads/diameters, tubing size, and single source supply equipment specifications. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See Annex A2 for specific safety precautions. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 This test method was developed to evaluate the liner scuffing and ring distress performance of engine oils in turbocharged and intercooled four-cycle diesel engines equipped with EGR, uncoated top rings, and running on ultra-low sulfur diesel fuel. Results are obtained from used oil analysis, operational data, and component measurements before and after test. 5.2 The test method may be used for engine oil specification acceptance when all details of the procedure are followed.