【国外标准】 Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence VIII Spark-Ignition Engine (CLR Oil Test Engine)

5.1 This test method is used to evaluate automotive engine oils for protection of engines against bearing weight loss.5.2 This test method is also used to evaluate the SIG capabilities of multiviscosity-graded oils.5.3 Correlation of test results with those obtained in automotive service has not been established.5.4 Use—The Sequence VIII test method is useful for engine oil specification acceptance. It is used in specifications and classifications of engine lubricating oils, such as the following:5.4.1 Specification D4485.5.4.2 API Publication 1509 Engine Oil Licensing and Certification System.65.4.3 SAE Classification J304.1.1 This test method covers the evaluation of automotive engine oils (SAE grades 0W, 5W, 10W, 20, 30, 40, and 50, and multi-viscosity grades) intended for use in spark-ignition gasoline engines. The test procedure is conducted using a carbureted, spark-ignition Cooperative Lubrication Research (CLR) Oil Test Engine (also referred to as the Sequence VIII test engine in this test method) run on unleaded fuel. An oil is evaluated for its ability to protect the engine and the oil from deterioration under high-temperature and severe service conditions. The test method can also be used to evaluate the viscosity stability of multi-viscosity-graded oils. Companion test methods used to evaluate engine oil performance for specification requirements are discussed in the latest revision of Specification D4485.1.2 Correlation of test results with those obtained in automotive service has not been established. Furthermore, the results obtained in this test are not necessarily indicative of results that will be obtained in a full-scale automotive spark-ignition or compression-ignition engine, or in an engine operated under conditions different from those of the test. The test can be used to compare one oil with another.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—The values stated in inch-pounds for certain tube measurements, screw thread specifications, and sole source supply equipment are to be regarded as standard.1.3.1.1 The bearing wear in the text is measured in grams and described as weight loss, a non-SI term.1.4 This test method is arranged as follows:Subject SectionIntroduction   1Referenced Documents 2Terminology 3Summary of Test Method 4  Before Test Starts 4.1  Power Section Installation 4.2  Engine Operation (Break-in) 4.3  Engine Operation (Test/Samples) 4.4  Stripped Viscosity 4.5  Test Completion (BWL) 4.6 5  Evaluation of Automotive oils 5.1  Stay in Grade Capabilities 5.2  Correlation of Results 5.3  Use 5.4Apparatus 6  Test Engineering, Inc. 6.1  Fabricated or Specially Prepared Items 6.2  Instruments and Controls 6.3  Procurement of Parts 6.4Reagents and Materials 7  Reagents 7.1  Cleaning Materials 7.2  Expendable Power Section-Related Items 7.3  Power Section Coolant 7.4  Reference Oils 7.5  Test Fuel 7.6Test Oil Sample Requirements 8  Selection 8.1  Inspection 8.2  Quantity 8.3Preparation of Apparatus 9  Test Stand Preparation 9.1  Conditioning Test Run on Power Section 9.2  General Power Section Rebuild Instructions 9.3  Reconditioning of Power Section After Each Test 9.4Calibration 10  Power Section and Test Stand Calibration 10.1  Instrumentation Calibration 10.2  Calibration of AFR Measurement Equipment 10.3  Calibration of Torque Wrenches 10.4Engine Operating Procedure 11  Run-In and Flush 11.1  Test Operating Conditions 11.2  Air-Fuel Ratio and Spark Advance 11.3  Air, Off-Gas and Blowby Measurement 11.4  Unscheduled Shutdowns 11.5  Oil Sampling and Oil Addition 11.6  Periodic Measurements 11.7  Final Oil Drain and Oil Consumption Computation 11.8  Operational Validity Criteria 11.9  Test Completion 11.10Determination of Test Results 12  Oil Analysis 12.1  Test Bearing Weight Loss Determination 12.2Report 13Precision and Bias 14  Precision 14.1  Bias 14.2Use of ASTM Rounding 15Keywords 16ANNEXESASTM Test Monitoring Center Organization Annex A1ASTM Test Monitoring Center: Calibration Procedures Annex A2ASTM Test Monitoring Center: Maintenance Activities Annex A3ASTM Test Monitoring Center: Related Information Annex A4Measurement of Connecting Rod Bearing Clearance andJournal Taper Annex A5Measurement of Main Bearing Clearance Annex A6Measurement of Piston-to-Sleeve Clearance Annex A7Control Chart Technique for a Laboratory's SeverityAdjustment (SA) Annex A8Recommended New Liner Honing Procedure Annex A9Sequence VIII Oil Priming Procedure Annex A10Alternative Crankcase Breather Configuration Annex A11Connecting Rod Bearing Cleaning Procedure Annex A12Electronic Ignition Conversion Annex A13System Response Procedure Annex A14Air-Fuel Ratio Measurement Annex A15Lead Decontamination Procedure Annex A16Crankshaft Rear Seal Conditioning Annex A17Report Forms and Data Dictionary Annex A18Stay-in-Grade Oil Analysis Procedure Annex A19APPENDIXESSuggested Method for Salvaging Camshaft Bearing Journals Appendix X1Data Log Sheets Appendix X21.5 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 precautionary statements are provided throughout this test method.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.