【国外标准】 Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IIIG, Spark-Ignition Engine

5.1 This test method was developed to evaluate automotive engine oils for protection against oil thickening and engine wear during moderately high-speed, high-temperature service.5.2 The increase in oil viscosity obtained in this test indicates the tendency of an oil to thicken because of oxidation. In automotive service, such thickening can cause oil pump starvation and resultant catastrophic engine failures.5.3 The deposit ratings for an oil indicate the tendency for the formation of deposits throughout the engine, including those that can cause sticking of the piston rings in their grooves. This can be involved in the loss of compression pressures in the engine.5.4 The camshaft and lifter wear values obtained in this test provide a measure of the anti-wear quality of an oil under conditions of high unit pressure mechanical contact.5.5 The test method was developed to correlate with oils of known good and poor protection against oil thickening and engine wear. Specially formulated oils that produce less than desirable results with unleaded fuels were also used during the development of this test.5.6 The Sequence IIIG engine oil test has replaced the Sequence IIIF test and can be used in specifications and classifications of engine lubricating oils, such as the following:5.6.1 Specification D4485,5.6.2 Military Specification MIL-PRF-2104, and5.6.3 SAE Classification J183.1.1 This test method covers an engine test procedure for evaluating automotive engine oils for certain high-temperature performance characteristics, including oil thickening, varnish deposition, oil consumption, as well as engine wear. Such oils include both single viscosity grade and multiviscosity grade oils that are used in both spark-ignition, gasoline-fueled engines, as well as in diesel engines.1.1.1 Additionally, with nonmandatory supplemental requirements, a IIIGA Test (Mini Rotary Viscometer and Cold Cranking Simulator measurements), a IIIGVS Test (EOT viscosity increase measurement), or a IIIGB Test (phosphorous retention measurement) can be conducted. These supplemental test procedures are contained in Appendix X1, Appendix X2, and Appendix X3, respectively.NOTE 1: Companion test methods used to evaluate engine oil performance for specification requirements are discussed in SAE J304.1.2 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 Exception—Where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, and tubing size.1.3 This test method is arranged as follows:  SectionIntroduction   1Referenced Documents 2Terminology 3Summary of Test Methods 4 5Apparatus 6 Laboratory 6.1 Drawings 6.2 Specified Equipment 6.3 Test Engine 6.4  Engine Parts 6.4.1 Engine Speed and Load Control 6.5 Fluid Conditioning Module 6.6  Engine Cooling System 6.6.1 Flushing Tank 6.7 Coolant Mixing Tank 6.8 Condenser Cooling Systems 6.9 Engine Oil-Cooling System 6.10 Fuel System 6.11 Induction Air Supply Humidity, Temperature, and Pressure 6.12 Temperature Measurement 6.13  Thermocouple Location 6.13.1 Air-to-Fuel Ratio Determination 6.14  Injector Flow Testing 6.14.1 Exhaust and Exhaust Back Pressure Systems 6.15 Blowby Flow Rate Measurement 6.16 Pressure Measurement and Pressure Sensor Location 6.17Reagents and Materials 7 Test Fuel 7.1 Engine and Condenser Coolant 7.2 Coolant Additive 7.3 Coolant Preparation 7.4 Pre-Test Cleaning Materials 7.5 Sealing and Anti-seize Compounds 7.6Test Oil Sample Requirements 8Preparation of Apparatus 9 Condenser Cleaning 9.1 Intake Manifold Cleaning 9.2 Cleaning of Engine Parts (other than the block and heads) 9.3 Connecting Rod Cleaning 9.4 Engine Block Cleaning 9.5 Cylinder Head Cleaning 9.6 Engine Build-up Procedure 9.7  General Information 9.7.1  Special Parts 9.7.2  Hardware Information 9.7.3  Fastener Torque Specifications and Torquing Procedures 9.7.4   Main Bearing Cap Bolts 9.7.4.1   Cylinder Head Bolts 9.7.4.2   Torques for Miscellaneous Bolts, Studs, and Nuts 9.7.4.3 Parts Replacement 9.8 Engine Block Preparation 9.9 Piston Fitting and Numbering 9.10  Piston Ring Fitting 9.10.1 Pre-Test Camshaft and Lifter Measurements 9.11 Camshaft Bearing Installation 9.12 Camshaft Installation 9.13 Main Bearings 9.14  Crankshaft Installation 9.14.1  Main Bearing Cap Installation 9.14.2 Crankshaft Sprocket 9.15 Camshaft Sprocket, and Timing Chain 9.16 Crankshaft End Play 9.17 Piston Pin Installation 9.18  Piston Installation 9.18.1 Harmonic Balancer 9.19 Connecting Rod Bearings 9.20 Engine Front Cover 9.21 Coolant Inlet Adapter 9.22 Oil Dipstick Hole 9.23 Oil Pan 9.24 Cylinder Head Assembly 9.25 Adjustment of Valve Spring Loads 9.26 Cylinder Head Installation 9.27 Hydraulic Valve Lifters 9.28 Pushrods 9.29 Valve Train Loading 9.30 Intake Manifold 9.31 Rocker Covers 9.32 Water Inlet Adapter 9.33 Condenser 9.34 Coolant Outlet Adapter 9.35 External Oil Cooling System 9.36 Oil Sample Valve 9.37 Ignition System 9.38 Throttle Body 9.39 Accessory Drive Units 9.40 Exhaust Manifolds, Water-Cooled 9.41 Engine Flywheel 9.42 Pressure Checking of Engine Coolant System 9.43 Lifting of Assembled Engines 9.44 Mounting the Engine on the Test Stand 9.45 External Cooling System Cleaning 9.46 Engine Coolant Jacket Cleaning (Flushing) 9.47 Coolant Charging 9.48 Test Oil Charging 9.49 Engine Oil Pump Priming 9.50Calibration 10 Laboratory and Engine Test Stand Calibration 10.1 Testing of Reference Oils 10.2 Reference Oil Test Frequency 10.3 Evaluation of Reference Oil Test Results 10.4 Status of Non-Reference Oil Tests Relative to Reference  Oil Test 10.5 Status of Test Stands Used for Non-Standard Tests 10.6 Data Acquisition and Control 10.7  Sample Rate 10.7.1  Measurement Accuracy 10.7.2  Temperature 10.7.3  Pressure 10.7.4  Flow 10.7.5  Speed 10.7.6  Load 10.7.7  Measurement Resolution 10.7.8  System Time Response 10.7.9  Quality Index 10.7.10Engine Operating Procedure 11 Dipstick and Hole Plug 11.1 Dipstick Hole O-ring 11.2 Engine Start-up and Shutdown Procedures 11.3 Start-up 11.4 Scheduled Shutdown 11.5 Non-Scheduled Shutdowns 11.6 Oil Sampling 11.7 Oil Leveling 11.8 Air-to-Fuel-Ratio Measurement and Control 11.9 Air-to-Fuel Ratio Verification 11.10 Blowby Flow Rate Measurement 11.11 NOx Determinations 11.12 Data Recording 11.13 Initial run (10 min) 11.14 Engine Oil Quality Testing (100 h) 11.15 Test Termination 11.16Determination of Test Results 12 Engine Disassembly 12.2 Preparation of Parts for Rating of Sticking, Deposits,  and Plugging 12.3 Piston Deposit Rating 12.4 Post-Test Camshaft and Lifter Wear Measurements 12.5 Viscosity Test 12.6 Testing Oil Samples for Wear Metals 12.7 Blowby Flow Rate Measurements 12.8 Oil Consumption Computation 12.9 Photographs of Test Parts 12.10 Retention of Representative Test Parts 12.11 Severity Adjustments 12.12 Determination of Operational Validity 12.13Report 13 Report Forms 13.1 Precision of Reported Units 13.4Precision and Bias 14Keywords 15ASTM 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 A4Sequence IIIG Test Parts Replacement Guidelines Annex A5Sequence IIIG Determination Volume of Engine Oil in Pan Annex A6Sequence IIIG Test Fuel Analysis Annex A7Sequence IIIG Test Report Forms and Data Dictionary Annex A8Sequence IIIG Test Air-to-Fuel Ratio Control Flow Chart Annex A9Sequence IIIG Test Set Points and Control States Annex A10Sequence IIIG Quality Index Upper and Lower Values Annex A11Sequence IIIG Engine Oil Level Worksheet Annex A12Blowby Flow Rate Determination Annex A13Safety Hazards Annex A14Sequence IIIG Blueprint Listing Annex A15Fluid Condition Module Components Annex A16Engine Build Worksheets Annex A17Engine Oil Cooling System Schematic Annex A18Guidelines For Hardware Subject To First-In/First-Out Criteria Annex A19Sequence IIIGA Test Procedure Appendix X1Sequence IIIGVIS Test Procedure Appendix X2Sequence IIIGB Test Procedure Appendix X31.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific warning statements are provided in 6.14.1.1 and 7.1.1.5 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.