Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM D6709-08
• Năm ban hành / Publication date: 2008
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence VIII Spark-Ignition Engine (CLR Oil Test Engine)
• Số trang / Page: 39
• Phạm vi áp dụng / Scope of standard: 1.1 This test method covers the evaluation of automotive engine oils (SAE grades 5W, 10W, 20, 30, 40, and 50, and multiviscosity 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 multiviscosity-graded oils. Companion test methods used to evaluate engine oil performance for specification requirements are discussed in the latest revision of Specification D 4485. 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, except for (1) volume which is given in the metric, but non-SI, litre, (2) certain tube measurements which are given in inch-pound units, (3) cylinder bore and stroke in both SI and inch-pound units (the inch-pound being the standard) and (4) piston displacement given in metric (non-SI) and inch-pound units (the inch-pound being the standard). In respect to (3) and (4) the inch-pound units are shown first and the SI units in parentheses. 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 and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are provided throughout this test method. 1.5 This test method is arranged as follows:SubjectSectionIntroduction Scope1Referenced Documents2Terminology3Summary of Test Method4 Before Test Starts4.1 Power Section Installation4.2 Engine Operation (Break-in)4.3 Engine Operation (Test/Samples)4.4 Stripped Viscosity4.5 Test Completion (BWL)4.6Significance and Use5 Evaluation of Automotive oils5.1 Stay in Grade Capabilities5.2 Correlation of Results5.3 Use5.4Apparatus6 Test Engineering, Inc.6.1 Fabricated or Specially Prepared Items6.2 Instruments and Controls6.3 Procurement of Parts6.4Reagents and Materials7Reagents7.1 Cleaning Materials7.2 Expendable Power Section-Related Items7.3 Power Section Coolant7.4 Reference Oils7.5 Test Fuel7.6Test Oil Sample Requirements8 Selection8.1 Inspection8.2 Quantity8.3Preparation of Apparatus9 Test Stand Preparation9.1 Conditioning Test Run on Power Section9.2 General Power Section Rebuild Instructions9.3 Reconditioning of Power Section After Each Test9.4Calibration10 Power Section and Test Stand Calibration10.1 Instrumentation Calibration10.2 Calibration of AFR Measurement Equipment10.3 Calibration of Torque Wrenches10.4Engine Operating Procedure11 Run-In and Flush11.1 Test Operating Conditions11.2 Air-Fuel Ratio and Spark Advance11.3 Air, Off-Gas and Blowby Measurement11.4 Unscheduled Shutdowns11.5 Oil Sampling and Oil Addition11.6 Periodic Measurements11.7 Final Oil Drain and Oil Consumption Computation11.8 Operational Validity Criteria11.9 Test Completion11.10Determination of Test Results12 Oil Analysis12.1 Test Bearing Weight Loss Determination12.2Report14Precision and Bias15 Precision15.1 Bias15.2Use of ASTM Rounding16Keywords17ANNEXESMeasurement of Connecting Rod Bearing Clearance and Journal TaperAnnex A1Measurement of Main Bearing ClearanceAnnex A2The ASTM Test Monitoring Center Calibration ProgramAnnex A3Measurement of Piston-to-Sleeve ClearanceAnnex A4Control Chart Technique for a Laboratory's Severity Adjustment (SA)Annex A5Recommended New Liner Honing ProcedureAnnex A6Sequence VIII Oil Priming ProcedureAnnex A7Alternative Crankcase Breather ConfigurationAnnex A8Connecting Rod Bearing Cleaning ProcedureAnnex A9Electronic Ignition ConversionAnnex A10System Response ProcedureAnnex A11Air-Fuel Ratio MeasurementAnnex A12Lead Decontamination ProcedureAnnex A13Stay-in-Grade Oil Analysis ProcedureAnnex A14Crankshaft Rear Seal ConditioningAnnex A15Report Forms and Data DictionaryAnnex A16Test Fuel SpecificationAnnex A17APPENDIXESRole of the ASTM Test Monitoring Center and the Calibration ProgramAppendix X1Suggested Method for Salvaging Camshaft Bearing JournalsAppendix X2Data Log SheetsAppendix X3