1.1本试验方法涵盖了全尺寸清洁发动机试验，旨在评估模拟重载驾驶条件下发动机冷却剂的防腐和缓蚀剂稳定性。 1.2以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 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）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 第6节给出了具体的危害说明。 ====意义和用途====== 该试验方法提供了一种实验室技术，能够再现冷却剂在实际发动机运行条件下遇到的复杂环境应力。该测试方法改善了对玻璃器皿和模拟服务测试的辨别能力，并改善了与现场服务的相关性。尽管该试验方法对于开发满足更高服务要求的冷却剂特别有价值，但仍然需要进行现场试验，以全面评估冷却剂性能。

1.1 This test method covers a full-scale clean engine test designed to evaluate corrosion protection and inhibitor stability of engine coolants under simulated heavy-duty driving conditions. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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 and health practices and determine the applicability of regulatory limitations prior to use. Specific hazards statements are given in Section 6. ====== Significance And Use ====== This test method provides a laboratory technique capable of reproducing the complex environmental stresses a coolant encounters under actual engine operating conditions. The test method provides improved discrimination over glassware and simulated service tests and improved correlation with field service. Although the test method is particularly valuable for developing coolants for increased service requirements, it remains that field testing is necessary to evaluate coolant performance completely.