1.1 本试验方法涵盖了使用高频往复式钻机（HFRR）评估柴油燃料的润滑性。 1.2 根据规范，该试验方法适用于中间馏分燃料，如1-D级S15、S500和S5000，以及2-D级S15、S500和S5000柴油 D975 ;和其它类似的可用于柴油发动机的石油基燃料。该测试方法也适用于生物柴油混合物。B5被包括在确定精度声明的循环程序中。 附注1: 尚不清楚该测试方法是否能预测所有添加剂/燃料组合的性能。正在进行额外的工作来建立这种相关性，一旦这项工作完成，可能需要对该测试方法进行未来的修订。 1.3 以SI单位表示的值将被视为标准值。本标准不包括其他计量单位。 1.4 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 第节给出了具体的警告声明 7 . 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》中确立的国际公认的标准化原则制定的。======意义和用途====== 5.1 柴油燃料喷射设备在一定程度上依赖于柴油燃料的润滑性能。发动机部件(例如柴油燃料喷射泵和喷射器)的寿命缩短有时归因于柴油燃料缺乏润滑性。 5.2 对于一些燃料/硬件组合，HFRR测试结果导致柴油喷射系统泵部件因磨损而损坏的趋势已在泵装置测试中得到证实，其中边界润滑被认为是部件运行中的一个因素。 6 5.3 HFRR试验中产生的磨痕对流体和试验材料的污染、试验燃料的温度和环境相对湿度很敏感。润滑性评估对测试燃料取样和储存期间获得的痕量污染物也很敏感。5.4 气缸润滑性评价器上的HFRR和磨损载荷球（SLBOCLE，试验方法 D6078 ）是评价柴油润滑性的两种方法。两种测试方法之间没有绝对相关性。 5.5 HFRR可用于评估柴油燃料在规定的测试条件下防止磨损的相对有效性。HFRR测试结果与柴油喷射系统现场性能的相关性尚未确定。 5.6 该测试方法旨在评估边界润滑性能。虽然在该测试方法中粘度对润滑性的影响没有完全消除，但它们被最小化。

1.1 This test method covers the evaluation of the lubricity of diesel fuels using a high-frequency reciprocating rig (HFRR). 1.2 This test method is applicable to middle distillate fuels, such as Grades No. 1-D S15, S500, and S5000, and Grades No. 2-D S15, S500, and S5000 diesel fuels, in accordance with Specification D975 ; and other similar petroleum-based fuels which can be used in diesel engines. This test method also is applicable to biodiesel blends. B5 was included in the round robin program that determined the precision statement. Note 1: It is not known that this test method will predict the performance of all additive/fuel combinations. Additional work is underway to establish this correlation and future revisions of this test method may be necessary once this work is complete. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 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. Specific warning statements are given in Section 7 . 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 Diesel fuel injection equipment has some reliance on lubricating properties of the diesel fuel. Shortened life of engine components, such as diesel fuel injection pumps and injectors, has sometimes been ascribed to lack of lubricity in a diesel fuel. 5.2 The trend of HFRR test results to diesel injection system pump component distress due to wear has been demonstrated in pump rig tests for some fuel/hardware combinations where boundary lubrication is believed to be a factor in the operation of the component. 6 5.3 The wear scar generated in the HFRR test is sensitive to contamination of the fluids and test materials, the temperature of the test fuel, and the ambient relative humidity. Lubricity evaluations are also sensitive to trace contaminants acquired during test fuel sampling and storage. 5.4 The HFRR and Scuffing Load Ball on Cylinder Lubricity Evaluator (SLBOCLE, Test Method D6078 ) are two methods for evaluating diesel fuel lubricity. No absolute correlation has been developed between the two test methods. 5.5 The HFRR may be used to evaluate the relative effectiveness of diesel fuels for preventing wear under the prescribed test conditions. Correlation of HFRR test results with field performance of diesel fuel injection systems has not yet been determined. 5.6 This test method is designed to evaluate boundary lubrication properties. While viscosity effects on lubricity in this test method are not totally eliminated, they are minimized.