【国外标准】 Standard Test Method for Evaluation of Automotive Engine Oils for Valve-Train Wear Performance in Cummins ISB Medium-Duty Diesel Engine

5.1 This test method was developed to assess the performance of a heavy-duty engine oil in controlling engine wear under operating conditions selected to accelerate soot production and valve-train wear in a turbocharged and aftercooled four-cycle diesel engine with sliding tappet followers equipped with exhaust gas recirculation hardware.5.2 The design of the engine used in this test method is representative of many, but not all, modern diesel engines. This factor, along with the accelerated operating conditions, shall be considered when extrapolating test results.1.1 This test method, commonly referred to as the Cummins ISB Test, covers the utilization of a modern, 5.9 L, diesel engine equipped with exhaust gas recirculation and is used to evaluate oil performance with regard to valve-train wear.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—SI units are provided for all parameters except where there is no direct equivalent such as the units for screw threads, National Pipe Threads/diameters, tubing size, or where there is a sole source of supply equipment specification.1.2.2 See also A7.1 for clarification; it does not supersede 1.2 and 1.2.1.1.3 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 A1 for general safety precautions.1.4 Table of Contents:   Section 1Referenced Documents 2Terminology 3Summary of Test Method 4 5Apparatus 6Engine Fluids and Cleaning Solvents 7Preparation of Apparatus 8Engine/Stand Calibration and Non-Reference Oil Tests 9Test Procedure 10Calculations, Ratings, and Test Validity 11Report 12Precision and Bias 13Annexes  Safety Precautions Annex A1Intake Air Aftercooler Annex A2The Cummins ISB Engine Build Parts Kit Annex A3Sensor Locations and Special Hardware Annex A4External Oil System Annex A5Cummins Service Publications Annex A6Specified Units and Formats Annex A7Oil Analyses Annex A8Alternate Fuel Approval Process Annex A91.5 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.