1.1 这种发动机润滑剂试验方法通常称为滚柱从动件磨损试验。其主要结果是，液压气门挺杆总成中的滚柱从动轴磨损与1993年之前停止和运行交付服务中使用的车辆有关。这是评估满足API CG-4性能类别的润滑剂所需的测试方法之一。该试验也称为6.2升试验。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.2.1 例外情况- 如果没有直接的SI等效物，例如管件、热电偶直径和NPT螺纹。此外，滚子从动件磨损以密耳为单位进行测量。 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、健康和环境实践，并确定监管限制的适用性。 1.4 目录: 部分 范围 1. 参考文件 2. 术语 3. 试验方法总结 4. 意义和用途 5. 试剂 7. 替代指南 7.1 仪器 6. 仪器的准备 8. 新发动机准备 8.1 安装辅助系统和 其他组件 8.2 试验程序 9 测试段和组织的描述 试验程序章节 9.1 发动机零件的更换 9.2 发动机起动程序 9.3 正常发动机停机程序 9.4 紧急停机程序 9.5 计划外停机 9.6 新发动机磨合 9.7 预测试程序 9.8 50小时稳态试验 9.9 定期测量 9.10 油取样和加油程序 9.11 测试结束（EOT）程序 9.12 测试结果的计算和解释 10 零件测量区域的环境 10.1 滚子从动轴磨损测量 10.2 机油分析 10.3 测试有效性评估 10.4 最终测试报告 11 报告校准测试结果 11.1 报告表格 11.2 临时无效校准测试摘要 11.3 严重性调整 11.4 精度和偏差 12 精确 12.1 精度估算 12.2 偏见 12.3 关键词 13 附件 测试零件替换或修改指南 附件A1 单位和规格格式指南 附件A2 仪器的详细规格 附件A3 标定 附件A4 最终报告表格 附件A5 插图 附录A6 100°C时的运动粘度程序 滚子从动件磨损试验 附件A7 增强热重分析（TGA） 烟尘测量程序 附录A8 材料和信息来源 附录A9 附录 PC-9参考柴油特性 附录X1 诊断数据审查 附录X2 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本试验方法用于确定发动机曲轴箱油控制磨损的能力，该磨损在低至中等发动机转速和重型发动机扭矩下可能在现场发生。对货车车队中的两种或两种以上油品进行并排比较，以证明各种油品的现场性能。制定了本试验方法的具体操作条件，以提供与这些油的现场性能的相关性。 5.2 本试验方法以及其他试验方法规定了API CG-4类重型柴油发动机润滑油的最低性能水平。该类别的通过限制包括在规范中 D4485 . 5.3 本试验方法中使用的发动机设计并不代表所有现代柴油发动机。在推断试验结果时，考虑该因素以及用于加速磨损的特定操作条件。

1.1 This engine lubricant test method is commonly referred to as the Roller Follower Wear Test. Its primary result, roller follower shaft wear in the hydraulic valve lifter assembly, has been correlated with vehicles used in stop-and-go delivery service prior to 1993. It is one of the test methods required to evaluate lubricants intended to satisfy the API CG-4 performance category. This test has also been referred to as the 6.2 L 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 Exceptions— Where there is no direct SI equivalent, such as pipe fittings, thermocouple diameters, and NPT screw threads. Also, roller follower wear is measured in mils. 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. 1.4 Table of Contents: Section Scope 1 Referenced Documents 2 Terminology 3 Summary of Test Method 4 Significance and Use 5 Reagents 7 Guidelines on Substitution 7.1 Apparatus 6 Preparation of Apparatus 8 New Engine Preparation 8.1 Installation of Auxiliary Systems and Miscellaneous Components 8.2 Test Procedure 9 Description of Test Segments and Organization of Test Procedure Sections 9.1 Engine Parts Replacement 9.2 Engine Starting Procedure 9.3 Normal Engine Shutdown Procedure 9.4 Emergency Shutdown Procedure 9.5 Unscheduled Shutdown and Downtime 9.6 New Engine Break-In 9.7 Pretest Procedure 9.8 Fifty-Hour Steady State Test 9.9 Periodic Measurements 9.10 Oil Sampling and Oil Addition Procedures 9.11 End of Test (EOT) Procedure 9.12 Calculation and Interpretation of Test Results 10 Environment of Parts Measurement Area 10.1 Roller Follower Shaft Wear Measurements 10.2 Oil Analysis 10.3 Assessment of Test Validity 10.4 Final Test Report 11 Reporting Calibration Test Results 11.1 Report Forms 11.2 Interim Non-Valid Calibration Test Summary 11.3 Severity Adjustments 11.4 Precision and Bias 12 Precision 12.1 Precision Estimate 12.2 Bias 12.3 Keywords 13 ANNEXES Guidelines for Test Part Substitution or Modification Annex A1 Guidelines for Units and Specification Formats Annex A2 Detailed Specifications of Apparatus Annex A3 Calibration Annex A4 Final Report Forms Annex A5 Illustrations Annex A6 Kinematic Viscosity at 100°C Procedure for the Roller Follower Wear Test Annex A7 Enhanced Thermal Gravimetric Analysis (TGA) Procedure for Soot Measurement Annex A8 Sources of Materials and Information Annex A9 APPENDIXES PC-9 Reference Diesel Fuel Properties Appendix X1 Diagnostic Data Review Appendix X2 1.5 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 is used to determine the ability of an engine crankcase oil to control wear that can develop in the field under low to moderate engine speeds and heavy engine torques. Side-by-side comparisons of two or more oils in delivery van fleets were used to demonstrate the field performance of various oils. The specific operating conditions of this test method were developed to provide correlation with the field performance of these oils. 5.2 This test method, along with other test methods, defines the minimum performance level of the Category API CG-4 for heavy duty diesel engine lubricants. Passing limits for this category are included in Specification D4485 . 5.3 The design of the engine used in this test method is not representative of all modern diesel engines. Consider this factor, along with the specific operating conditions used to accelerate wear, when extrapolating test results.