【国外标准】 Standard Test Method for Evaluation of Diesel Engine Oils in T-8 Diesel Engine

5.1 This test method was developed to evaluate the viscometric performance of engine oils in turbocharged and intercooled four-cycle diesel engines. Results are obtained from used oil analysis.5.2 The test method is used for engine oil specification acceptance when all details of the procedure are followed.1.1 This test method covers an engine test procedure for evaluating diesel engine oils for performance characteristics, including viscosity increase and soot concentrations (loading).2 This test method is commonly referred to as the Mack T-8.1.2 This test method also provides the procedure for running an extended length T-8 test, which is commonly referred to as the T-8E and an abbreviated length test, which is commonly referred to as T-8A. The procedures for the T-8E and the T-8A are identical to the T-8 with the exception of the items specifically listed in Annex A8 and Annex A9 respectively. Additionally, the procedure modifications listed in Annex A8 and Annex A9 refer to the corresponding section of the T-8 procedure.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—Where there is no direct SI equivalent such as the units for screw threads, National Pipe Threads/diameters, tubing size, sole source equipment suppliers, and oil consumption in grams per kilowatt-hour.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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See Annex A6 for specific safety precautions.1.5 A Table of Contents follows: 1Referenced Documents 2Terminology 3Summary of Test Method 4 5Apparatus 6 General Description 6.1 The Test Engine 6.2 Mack Test Engine 6.2.1 Engine Cooling System 6.2.2 Engine Oil System 6.2.3 Auxiliary Oil System 6.2.4 Crankcase Aspiration 6.2.5 Blowby Meter 6.2.6 Air Supply and Filtration 6.2.7 Fuel Supply 6.2.8 Intake Manifold Temperature Control 6.2.9Engine Fluids 7 Test Oil 7.1 Test Fuel 7.2 Engine Coolant 7.3 Cleaning Materials 7.4Preparation of Apparatus at Rebuild 8 Cleaning of Parts 8.1 Valves, Seats, Guides, and Springs 8.2 Cylinder Liner, Piston, and Piston Ring Assembly 8.3 Injectors and Injection Pump 8.4 Assembly Instructions 8.5 Measurements 8.6Laboratory and Engine Test Stand Calibration/Non-ReferenceRequirements 9 Calibration Frequency 9.1 Calibration Reference Oils 9.2 Test Numbering 9.3 New Laboratories and New Test Stands 9.4 Calibrated Laboratories and Test Stands 9.5 Calibration Test Acceptance 9.6 Failing Calibration Tests 9.7 Non-Reference Oil Test Requirements 9.8Procedure 10 Pretest Procedure 10.1 Engine Start-Up 10.2 Engine Shutdown 10.3 Test Cycle 10.4 Oil Addition/Drain 10.5 Oil Samples 10.6 Oil Consumption Calculations 10.7 Fuel Samples 10.8 Periodic Measurements 10.9 Blowby 10.10 Centrifugal Oil Filter Mass Gain 10.11 Oil Filter Δ P Calculation 10.12 Post Test 10.13Inspection of Fuel and Oil During Test 11 Oil Inspection 11.1 Fuel Inspections 11.2 Oil Consumption 11.3Report 12 Reporting Test Results 12.1 Deviations from Test Operational Limits 12.2 Electronic Transmission of Test Results 12.3 Plots of Operational Data 12.4Precision and Bias 13 Precision 13.1 Bias 13.2Keywords 14Annexes  Report Forms Annex A1Sensor Locations Annex A2Kinematic Viscosity At 100 °C For Test Method D5967 Samples Annex A3Enhanced Thermal Gravimetric Analysis (TGA) Procedure Annex A4Procurement of Test Materials Annex A5Safety Precautions Annex A6Data Dictionary Annex A7T-8E Extended Length Test Requirements Annex A8T-8A Abbreviated Length Test Requirements Annex A9Mack T-8A, T-8, and T-8E Fuel Requirements Annex A101.6 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.