【国外标准】 Standard Test Method for Evaluation of Engine Oils in Diesel Four-Stroke Cycle Supercharged 1M-PC Single Cylinder Oil Test Engine

5.1 The test method is designed to relate to high-speed, supercharged diesel engine operation and, in particular, to the deposit control characteristics and antiwear properties of diesel crankcase lubricating oils.5.2 The test method is useful for the evaluation of diesel engine oil quality and crankcase oil specification acceptance. This test method, along with others, defines the minimum performance level of the API categories CF and CF-2 (detailed information about passing limits for these categories is included in Specification D4485). It is also used in MIL-PRF-2104.5.3 The results are significant only when all details of the procedure are followed. The basic engine used in this test method has a precombustion chamber (as compared to direct injection) and is most useful in predicting performance of engines similarly equipped. This factor should be considered when extrapolating test results. It has been found useful in predicting results with high sulfur fuels (that is, greater than 0.5 % by mass) and with certain preemission controlled engines. It has also been found useful when correlated with deposit control in two-stroke cycle diesel engines.1.1 This test method covers a four-stroke cycle diesel engine test procedure for evaluating engine oils for certain high-temperature performance characteristics, particularly ring sticking, ring and cylinder wear, and accumulation of piston deposits. Such oils include both single viscosity SAE grade and multiviscosity SAE grade oils used in diesel engines. It is commonly known as the 1M-PC test (PC for Pre-Chamber) and is used in several API oil categories, notably the CF and CF-2 and the military category described in MIL-PRF-2104 (see Note 1).NOTE 1: Companion test methods used to evaluate other engine oil performance characteristics for API oil categories CF and CF-2 are discussed in SAE J304. The companion tests used by the military can be found in MIL-PRF-2104.1.2 The values stated in SI units are to be regarded as standard.1.2.1 Exception—The values in parentheses are provided 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This test method is arranged as follows:TABLE OF CONTENTS 1Reference Documents 2Terminology 3Summary of Test Method 4 5Apparatus 6  Test Engine 6.1  Engine Accessories 6.2 – 6.14  Engine Oil System 6.15  Cooling System 6.16  Fuel System 6.17  Intake Air System 6.18  Exhaust System 6.19  Blowby Meter 6.20  Thermocouples 6.21  Parts 6.22  Instrumentation 6.23  Crankcase Paint 6.24Reagents and Materials 7  Fuel 7.1  Test Oil 7.2  Engine Coolant 7.3  Cleaning Materials 7.4Safety 8Preparation of Apparatus 9  Supplementary Service Information 9.1  General Engine Inspection 9.2  Intake Air System 9.3  Cooling System 9.4  Engine Cooling System Cleaning 9.5  Instrumentation Calibration Requirements 9.6  Engine Crankcase Cleaning 9.7  Additional Oil Filter 9.8  Flushing Procedure Components 9.9  Flushing Procedures 9.10  Piston Cleaning Preparation 9.11  Cylinder Head 9.12  Fuel Nozzle 9.13  Measurement 9.14Procedure 10  Engine Break-in 10.1  Pre-Test Preparations 10.2  Warm-up Procedure 10.3  Operating Conditions 10.4  Periodic Measurements 10.5  Engine Oil Level 10.6  Oil Addition Procedure 10.7  Cool-Down Procedure 10.8  Shutdowns 10.9  Fuel System 10.10  Brake Specific Oil Consumption (BSOC) Calculation 10.11Inspection 11  Preparation 11.1  Inspection 11.2  Rater Training 11.3  Referee Ratings 11.4Calibration of Test Method 12  Requirements 12.1  Reference Oils 12.2  Test Numbering 12.3  Definition of a Test 12.4  New Laboratories and New Test Stands 12.5  Frequency of Calibration Tests 12.6  Specified Test Parameters 12.10  Acceptance of Calibration Tests 12.11  Failing Reference Oil Calibration Tests 12.12  Non-Standard Tests 12.13  Severity Adjustments and Control Charting 12.14  Test Reporting 12.15  Reporting Reference Results 12.16  Analysis of Reference Oils 12.17Precision and Bias 13  Precision 13.1  Bias 13.2Keywords 14 ANNEXES   Figures and Schematics Annex A1  Report Forms Annex A2  Test Fuel Information Annex A3 APPENDIXES   Humidity Correction Factors Appendix X1  Report Form Examples Appendix X2  1M-PC Multiple Testing Appendix X31.5 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.