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，包括粘度增加和烟尘浓度（负载）。 2. 该试验方法通常称为Mack T-8。 1.2 本试验方法还提供了运行延长长度T-8试验（通常称为T-8E）和缩短长度试验（通常称为T-8A）的程序。T-8E和T-8A的程序与T-8相同，但下列项目除外: 附录A8 和 附录A9 分别地此外，中列出的程序修改 附录A8 和 附录A9 请参阅T-8程序的相应章节。 1.3 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。 1.3.1 例外情况- 如果没有直接的国际单位制等效物，例如螺纹单位、国家管道螺纹/直径、管道尺寸、唯一来源设备供应商以及以克/千瓦时为单位的油耗。 1.4 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。 看见 附录A6 具体安全预防措施。 1.5 目录如下: 范围 1. 参考文件 2. 术语 3. 试验方法总结 4. 意义和用途 5. 仪器 6. 一般说明 6.1 测试发动机 6.2 Mack测试引擎 6.2.1 发动机冷却系统 6.2.2 发动机机油系统 6.2.3 辅助油系统 6.2.4 曲轴箱吸气 6.2.5 窜气量计 6.2.6 空气供应和过滤 6.2.7 燃料供应 6.2.8 进气歧管温度控制 6.2.9 发动机油液 7. 测试油 7.1 试验燃料 7.2 发动机冷却液 7.3 清洁材料 7.4 重建时的仪器准备 8. 零件的清洁 8.1 阀门、阀座、导管和弹簧 8.2 缸套、活塞和活塞环组件 8.3 喷油器和喷油泵 8.4 装配说明 8.5 测量 8.6 实验室和发动机试验台校准/非参考 要求 9 校准频率 9.1 校准参考油 9.2 测试编号 9.3 新实验室和新试验台 9.4 校准实验室和试验台 9.5 校准测试验收 9.6 校准测试失败 9.7 非参考油测试要求 9.8 程序 10 预测试程序 10.1 发动机启动 10.2 发动机停机 10.3 试验循环 10.4 机油添加/排放 10.5 油样 10.6 油耗计算 10.7 燃料样品 10.8 定期测量 10.9 漏气 10.10 离心式机油滤清器质量增益 10.11 机油滤清器Δ P 计算 10.12 测试后 10.13 试验期间燃料和油的检查 11 机油检查 11.1 燃料检查 11.2 机油消耗量 11.3 汇报 12 报告测试结果 12.1 与试验操作极限的偏差 12.2 测试结果的电子传输 12.3 操作数据图 12.4 精度和偏差 13 精确 13.1 偏见 13.2 关键词 14 附件 报告表格 附件A1 传感器位置 附件A2 100时的运动粘度 °C试验方法 D5967 样品 附件A3 增强热重分析（TGA）程序 附件A4 测试材料的采购 附件A5 安全注意事项 附录A6 数据字典 附件A7 T-8E加长试验要求 附录A8 T-8A缩短长度试验要求 附录A9 Mack T-8A、T-8和T-8E燃料要求 附件A10 1.6 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 本试验方法用于评估涡轮增压和中冷四缸发动机机油的粘度性能- 循环柴油发动机。结果来自二手油分析。 5.2 当遵循程序的所有细节时，测试方法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 viscosity increase and soot concentrations (loading). 2 This test method is commonly referred to as the Mack T-8. 1.2 This test method also provides the procedure for running an extended length T-8 test, which is commonly referred to as the T-8E and an abbreviated length test, which is commonly referred to as T-8A. The procedures for the T-8E and the T-8A are identical to the T-8 with the exception of the items specifically listed in Annex A8 and Annex A9 respectively. Additionally, the procedure modifications listed in Annex A8 and Annex A9 refer to the corresponding section of the T-8 procedure. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3.1 Exceptions— Where there is no direct SI equivalent such as the units for screw threads, National Pipe Threads/diameters, tubing size, sole source equipment suppliers, and oil consumption in grams per kilowatt-hour. 1.4 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 A6 for specific safety precautions. 1.5 A Table of Contents follows: Scope 1 Referenced Documents 2 Terminology 3 Summary of Test Method 4 Significance and Use 5 Apparatus 6 General Description 6.1 The Test Engine 6.2 Mack Test Engine 6.2.1 Engine Cooling System 6.2.2 Engine Oil System 6.2.3 Auxiliary Oil System 6.2.4 Crankcase Aspiration 6.2.5 Blowby Meter 6.2.6 Air Supply and Filtration 6.2.7 Fuel Supply 6.2.8 Intake Manifold Temperature Control 6.2.9 Engine Fluids 7 Test Oil 7.1 Test Fuel 7.2 Engine Coolant 7.3 Cleaning Materials 7.4 Preparation of Apparatus at Rebuild 8 Cleaning of Parts 8.1 Valves, Seats, Guides, and Springs 8.2 Cylinder Liner, Piston, and Piston Ring Assembly 8.3 Injectors and Injection Pump 8.4 Assembly Instructions 8.5 Measurements 8.6 Laboratory and Engine Test Stand Calibration/Non-Reference Requirements 9 Calibration Frequency 9.1 Calibration Reference Oils 9.2 Test Numbering 9.3 New Laboratories and New Test Stands 9.4 Calibrated Laboratories and Test Stands 9.5 Calibration Test Acceptance 9.6 Failing Calibration Tests 9.7 Non-Reference Oil Test Requirements 9.8 Procedure 10 Pretest Procedure 10.1 Engine Start-Up 10.2 Engine Shutdown 10.3 Test Cycle 10.4 Oil Addition/Drain 10.5 Oil Samples 10.6 Oil Consumption Calculations 10.7 Fuel Samples 10.8 Periodic Measurements 10.9 Blowby 10.10 Centrifugal Oil Filter Mass Gain 10.11 Oil Filter Δ P Calculation 10.12 Post Test 10.13 Inspection of Fuel and Oil During Test 11 Oil Inspection 11.1 Fuel Inspections 11.2 Oil Consumption 11.3 Report 12 Reporting Test Results 12.1 Deviations from Test Operational Limits 12.2 Electronic Transmission of Test Results 12.3 Plots of Operational Data 12.4 Precision and Bias 13 Precision 13.1 Bias 13.2 Keywords 14 Annexes Report Forms Annex A1 Sensor Locations Annex A2 Kinematic Viscosity At 100 °C For Test Method D5967 Samples Annex A3 Enhanced Thermal Gravimetric Analysis (TGA) Procedure Annex A4 Procurement of Test Materials Annex A5 Safety Precautions Annex A6 Data Dictionary Annex A7 T-8E Extended Length Test Requirements Annex A8 T-8A Abbreviated Length Test Requirements Annex A9 Mack T-8A, T-8, and T-8E Fuel Requirements Annex A10 1.6 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 viscometric performance of engine oils in turbocharged and intercooled four-cycle diesel engines. Results are obtained from used oil analysis. 5.2 The test method is used for engine oil specification acceptance when all details of the procedure are followed.