Область применения

1.1 This test method covers an engine test procedure for the measurement of the effects of automotive engine oils on the fuel economy of passenger cars and light-duty 3856 kg (8500 lb), or less, gross vehicle weight trucks. The tests are conducted using a specified 4.6-L spark-ignition engine on a dynamometer test stand. It applies to multiviscosity grade oils used in these applications. Companion test methods used to evaluate engine oil performance for specification requirements are discussed in the latest revision of Specification D4485.

1.2 The values stated in either SI units or other units shall be regarded separately as the standard. Within the text, the SI units are stated first with the other units shown in parentheses. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other, without combining values in any way.

1.3This 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.

1.4 This test method is arranged as follows:

SubjectSectionIntroductionScope1Referenced Documents2Terminology3Summary of Test Method4Significance and Use5Apparatus6General6.1Test Engine Configuration6.2Laboratory Ambient Conditions6.3Engine Speed and Load Control6.4Engine Cooling System6.5External Oil System6.6Fuel System6.7Engine Intake Air Supply6.8Temperature Measurement6.9AFR Determination6.10Exhaust and Exhaust Back Pressure Systems6.11Pressure Measurement and Pressure Sensor Locations6.12Engine Hardware and Related Apparatus6.13Miscellaneous Apparatus Related to Engine Operation6.14Reagents and Materials7Engine Oil7.1Test Fuel7.2Engine Coolant7.3Cleaning Materials7.4Sealing Compounds7.5Preparation of Apparatus8Test Stand Preparation8.2Engine Preparation9Cleaning of Engine Parts9.2Engine Assembly Procedure9.3General Assembly Instructions9.3.1Bolt Torque Specifications9.3.2Sealing Compounds9.3.3New Parts Required for Each New Engine9.3.4Harmonic Balancer9.3.5Oil Pan9.3.6Intake Manifold9.3.7Camshaft Covers9.3.8Thermostat9.3.9Thermostat Housing9.3.10Coolant Inlet9.3.11Oil Filter Adapter9.3.12Dipstick Tube9.3.13Water Pump9.3.14Sensors, Switches, Valves, and Positioners9.3.15Ignition System9.3.16Fuel Injection System9.3.17Intake Air System9.3.18Engine Management System (Spark and Fuel Control)9.3.19Accessory Drive Units9.3.20Exhaust Manifolds9.3.21Engine Flywheel and Guards9.3.22Lifting of Assembled Engines9.3.23Engine Mounts9.3.24Calibration10BC Pre-Test Verification10.1Engine/Test Stand Calibration10.2Procedure10.2.1Reporting of Reference Results10.2.2Analysis of Reference Oils10.2.3Flush Effectiveness Demonstration10.2.4Instrument Calibration10.3Engine Load Measurement System10.3.1Fuel Flow Measurement System10.3.2Coolant Flow Measurement System10.3.3Thermocouple and Temperature Measurement System10.3.4Humidity Measurement System10.3.5Other Instrumentation10.3.6Test Procedure11Preparation for Initial Start-Up of New Engine11.1Initial Engine Start-Up11.2Coolant Flush11.3New Engine Break-In11.4Routine Test Operation11.5Start-Up and Shutdown Procedures11.5.8Flying Flush Oil Exchange Procedures11.5.9Test Operating Stages11.5.10Stabilization to Stage Conditions11.5.11Stabilized BSFC Measurement Cycle11.5.12Data Logging11.5.13BC Oil Flush Procedure for BC Oil Before Test Oil11.5.14BSFC Measurement of BC Oil Before Test Oil11.5.15Test Oil Flush Procedure11.5.16Test Oil Aging11.5.17BSFC Measurement of Aged Test Oil11.5.18BC Oil Flush Procedure for BC Oil After Test Oil11.5.19BSFC Measurement for BC Oil After Test Oil11.5.20General Test Data Logging Forms11.5.21Diagnostic Review Procedures11.5.22Determination of Test Results12Final Test Report13Validity Statement13.1Report Format13.2Precision, Validity, and Bias14Precision14.1Validity14.2Test Stand Calibration Status14.2.1Validity Interpretation of Deviant Operational Conditions14.2.2Keywords15ANNEXESRole of ASTM Test Monitoring CenterAnnex A1Detailed Specifications and Drawings of ApparatusAnnex A2Oil Heater Cerrobase Refill ProcedureAnnex A3Engine Part Number ListingAnnex A4Flying Flush ChecklistsAnnex A5Safety PrecautionsAnnex A6Report FormatAnnex A7Control Chart Technique for Stand/Engine Severity Adjustment (SA)Annex A8Statistical Equations for Mean and Standard DeviationAnnex A9Fuel Injector EvaluationAnnex A10Pre-test Maintenance ChecklistAnnex A11APPENDIXESProcurement of Test MaterialsAppendix X1Data DictionaryAppendix X2