1、Designation: D7468 15Standard Test Method forCummins ISM Test1This standard is issued under the fixed designation D7468; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates t
2、he year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 The test method covers a heavy-duty diesel engine testprocedure conducted under high soot conditions to evaluate oilperformance with regard to valve train wear, top ri
3、ng wear,sludge deposits, and oil filter plugging in an EGR environment.This test method is commonly referred to as the Cummins ISMTest.21.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.2.1 ExceptionThe only exception is whe
4、re there is nodirect SI equivalent such as screw threads, national pipethreads/diameters, tubing sizes, or where there is a sole sourceof supply equipment specification.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility o
5、f the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. See Annex A1 forgeneral safety precautions.1.4 Table of Contents:SectionScope 1Referenced Documents 2Terminology 3Summary of Test Method 4Signifi
6、cance and Use 5Apparatus 6Test Engine Configuration 6.1Test Engine 6.1.1Oil Heat Exchanger, Adapter Blocks, Block Off Plate 6.1.2Oil Filter Head Modification 6.1.3Oil Pan Modification 6.1.4Engine Control Module (ECM) 6.1.5Engine Position Sensor 6.1.6SectionIntake Manifold Temperature Sensor 6.1.7Bar
7、ometric Pressure Sensor 6.1.8Turbocharger Controller 6.1.9Power Supply Voltage 6.1.10Air Compressor and Fuel Pump 6.1.11Engine Block Preparation 6.1.12Test Stand Configuration 6.2Engine Mounting 6.2.1Intake Air System 6.2.2Aftercooler 6.2.3Exhaust System 6.2.4Exhaust Gas Recirculation System 6.2.5Fu
8、el System 6.2.6Coolant System 6.2.7Pressurized Oil Fill System 6.2.8External Oil System 6.2.9Crankcase Aspiration 6.2.10Blowby Rate 6.2.11System Time Responses 6.3Oil Sample Containers 6.4Mass Balance 6.5Engine and Cleaning Fluids 7Test Oil 7.1Test Fuel 7.2Engine Coolant 7.3Pentane 7.4Solvent 7.5Pre
9、paration of Apparatus 8Cleaning of Parts 8.1General 8.1.1Engine Block 8.1.2Cylinder Head 8.1.3Rocker Cover and Oil Pan 8.1.4External Oil System 8.1.5Crosshead Cleaning and Measurement 8.1.6Rod Bearing Cleaning and Measurement 8.1.7Ring Cleaning and Measurement 8.1.8Injector Adjusting Screw Cleaning
10、and Measurement 8.1.9Engine Assembly 8.2General 8.2.1Parts Reuse and Replacement 8.2.2Build-Up Oil 8.2.3Coolant Thermostat 8.2.4Oil Thermostat 8.2.5Fuel Injectors 8.2.6New Parts 8.2.7Operational Measurements 8.3Units and Formats 8.3.1Instrumentation Calibration 8.3.2Temperatures 8.3.3Pressures 8.3.4
11、Flow Rates 8.3.5Intake and Exhaust CO2Measurement 8.3.6Engine/Stand Calibration and Non-Reference Oil Tests 9General 9.1New Test Stand 9.2New Test Stand Calibration 9.2.11This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products, Liquid Fuels, and Lubricants and is the di
12、rect responsibility ofSubcommittee D02.B0 on Automotive Lubricants.Current edition approved April 1, 2015. Published April 2015. Originallyapproved in 2008. Last previous edition approved in 2014 as D7468 14. DOI:10.1520/D7468-15.2Until the next revision of this test method, the ASTM Test Monitoring
13、 Centerwill update changes in this test method by means of Information Letters. Informa-tion letters may be obtained from the ASTM Test Monitoring Center, 6555 PennAvenue, Pittsburgh, PA 15206-4489, Attention: Administrator. This edition incor-porates revisions in all information letters through No.
14、 141.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1SectionStand Calibration Period 9.3Stand Modification and Calibration Status 9.4Test Numbering System 9.5General 9.5
15、.1Reference Oil Tests 9.5.2Non-Reference Oil Tests 9.5.3Reference Oil Test Acceptance 9.6Reference Oil Accountability 9.7Last Start Date 9.8Donated Reference Oil Test Programs 9.9Adjustments to Reference Oil Calibration Periods 9.10Procedural Deviations 9.10.1Parts and Fuel Shortages 9.10.2Reference
16、 Oil Test Data Flow 9.10.3Special Use of the Reference Oil Calibration System 9.10.4Test Procedure 10Engine Installation and Stand Connections 10.1Coolant System Fill 10.2Oil Fill for Break-in 10.3Engine Build Committed 10.3.3Fuel Samples 10.4Engine Warm-up 10.5Shutdown During Warm-up 10.5.1Engine B
17、reak-in 10.6Shutdown and Maintenance 10.7Normal Shutdown 10.7.1Emergency Shutdown 10.7.2Maintenance 10.7.3Downtime 10.7.4200-h Test Procedure 10.8Oil Fill for Test 10.8.2Operating Conditions 10.8.4Injection Timing Change 10.8.5Mass % Soot Validity 10.8.6Test Timer 10.8.7Operational Data Acquisition
18、10.8.8Oil Sampling 10.8.9Oil Addition 10.8.10End of Test (EOT) 10.9Engine Disassembly 10.9.3Calculations, Ratings and Test Validity 11Crosshead Mass Loss 11.1Crosshead Mass Loss Correction Factor 11.1.8Injector Adjusting Screw Mass Loss 11.2Injector Adjusting Screw Correction Factor 11.2.5Ring Mass
19、Loss 11.3Sludge Ratings 11.4Oil Filter Plugging 11.5Oil Analyses 11.6Oil Consumption 11.7Fuel Analyses 11.8Additional Analysis 11.8.1Assessment of Operational Validity 11.9Assessment of Test Interpretability 11.10Test Report 12Report Forms 12.1Reference Oil Test 12.2Electronic transmission of Test R
20、esults 12.2.1Precision and Bias 13Precision 13.1Intermediate Precision Conditions 13.1.1Reproducibility Conditions 13.1.2Bias 13.2Keywords 14AnnexesSafety Precautions Annex A1Intake Air Aftercooler Annex A2Engine Build Parts Kit Annex A3Sensor Locations, Special Hardware, and Engine BlockModificatio
21、nsAnnex A4External Oil System Annex A5Fuel Specification Annex A6Cummins Service Publications Annex A7Specified Units and Formats Annex A8Report Forms and Data Dictionary Annex A9Sludge Rating Worksheets Annex A10SectionOil Analyses Annex A11Determination of Operational Validity Annex A12Exhaust CO2
22、Sampling Probe Annex A13ISM Merit Rating Calculation Annex A14AppendixTypical System Configurations Appendix X12. Referenced Documents2.1 ASTM Standards:3D86 Test Method for Distillation of Petroleum Products atAtmospheric PressureD93 Test Methods for Flash Point by Pensky-MartensClosed Cup TesterD9
23、7 Test Method for Pour Point of Petroleum ProductsD130 Test Method for Corrosiveness to Copper from Petro-leum Products by Copper Strip TestD235 Specification for Mineral Spirits (Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)D287 Test Method for API Gravity of Crude Petroleum andPetroleum Pro
24、ducts (Hydrometer Method)D445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids (and Calculation of Dynamic Viscos-ity)D482 Test Method for Ash from Petroleum ProductsD524 Test Method for Ramsbottom Carbon Residue ofPetroleum ProductsD613 Test Method for Cetane Number of Diesel Fu
25、el OilD664 Test Method for Acid Number of Petroleum Productsby Potentiometric TitrationD976 Test Method for Calculated Cetane Index of DistillateFuelsD1319 Test Method for Hydrocarbon Types in Liquid Petro-leum Products by Fluorescent Indicator AdsorptionD2274 Test Method for Oxidation Stability of
26、Distillate FuelOil (Accelerated Method)D2500 Test Method for Cloud Point of Petroleum ProductsD2622 Test Method for Sulfur in Petroleum Products byWavelength Dispersive X-ray Fluorescence SpectrometryD2709 Test Method for Water and Sediment in MiddleDistillate Fuels by CentrifugeD4052 Test Method fo
27、r Density, Relative Density, and APIGravity of Liquids by Digital Density MeterD4175 Terminology Relating to Petroleum, PetroleumProducts, and LubricantsD4294 Test Method for Sulfur in Petroleum and PetroleumProducts by Energy Dispersive X-ray Fluorescence Spec-trometryD4485 Specification for Perfor
28、mance of Active API ServiceCategory Engine OilsD4737 Test Method for Calculated Cetane Index by FourVariable EquationD4739 Test Method for Base Number Determination byPotentiometric Hydrochloric Acid Titration3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Custom
29、er Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.D7468 152D5185 Test Method for Multielement Determination ofUsed and Unused Lubricating Oils and Base Oils byInductively Coupled Plasma Atomic Emission
30、Spectrom-etry (ICP-AES)D5453 Test Method for Determination of Total Sulfur inLight Hydrocarbons, Spark Ignition Engine Fuel, DieselEngine Fuel, and Engine Oil by Ultraviolet FluorescenceD5967 Test Method for Evaluation of Diesel Engine Oils inT-8 Diesel EngineE29 Practice for Using Significant Digit
31、s in Test Data toDetermine Conformance with SpecificationsE178 Practice for Dealing With Outlying Observations2.2 Other ASTM Document:ASTM Deposit Rating Manual 20 (Formerly CRC Manual20)42.3 National Archives and Records Administration:Code of Federal Regulations Title 40 Part 86.310-7953. Terminol
32、ogy3.1 Definitions:3.1.1 blind reference oil, na reference oil, the identity ofwhich is unknown by the test facility. D41753.1.2 blowby, nin internal combustion engines, that por-tion of the combustion products and unburned air/fuel mixturethat leaks past piston rings into the engine crankcase durin
33、goperation.3.1.3 calibrate, vto determine the indication or output of adevice (e.g., thermometer, manometer, engine) with respect tothat of a standard.3.1.4 exhaust gas recirculation (EGR), na method bywhich a portion of the engine exhaust is returned to thecombustion chambers through the intake sys
34、tem.3.1.5 heavy-duty, adjin internal combustion engineoperation, characterized by average speeds, power output, andinternal temperatures that are close to the potential maximum.D44853.1.6 heavy-duty engine, nin internal combustion enginetypes, one that is designed to allow operation continuously at
35、orclose to its peak output.3.1.7 non-reference oil, nany oil other than a reference oil,such as a research formulation, commercial oil or candidate oil.D41753.1.8 non-standard test, na test that is not conducted inconformance with the requirements in the standard testmethod; such as running in an no
36、n-calibrated test stand orusing different test equipment, applying different equipmentassembly procedures, or using modified operating conditions.D41753.1.9 reference oil, nan oil of known performancecharacteristics, used as a basis for comparison. D44853.1.10 sludge, nin internal combustion engines
37、, a deposit,principally composed of insoluble resins and oxidation prod-ucts from fuel combustion and the lubricant, that does not drainfrom engine parts but can be removed by wiping with a cloth.D41753.1.11 test oil, nany oil subjected to evaluation in anestablished procedure. D59673.1.12 valve tra
38、in, nin internal combustion engines, theseries of components, such as valves, crossheads, rocker arms,push rods, and camshaft, that open and close the intake andexhaust valves.3.1.13 wear, nthe loss of material from a surface, gener-ally occurring between two surfaces in relative motion, andresultin
39、g from mechanical or chemical action or a combinationof both. D41753.2 Definitions of Terms Specific to This Standard:3.2.1 crosshead, nan overhead component, located be-tween the rocker arm and each intake valve and exhaust valvepair, that transfers rocker arm travel to the opening and closingof ea
40、ch valve pair.3.2.1.1 DiscussionEach cylinder has two crossheads, onefor each pair of intake valves and exhaust valves.3.2.2 de-rate protocols, nprotocols in the engine controlmodule that cause the engine to reduce power output whencertain operating parameters are exceeded.3.2.3 overhead, nin intern
41、al combustion engines, thecomponents of the valve train located in or above the cylinderhead.3.2.4 overfuel, vto cause the fuel flow to exceed thestandard production setting.4. Summary of Test Method4.1 This test method uses a Cummins ISM 500 diesel enginewith a specially modified engine block. Test
42、 operation includesa 25 min warm-up,a2hbreak-in, and 200 h in four 50 hstages. During stages A and C the engine is operated withretarded fuel injection timing and is overfueled to generateexcess soot. During stages B and D the engine is operated atconditions to increase valve train wear.4.2 Prior to
43、 each test, the engine is cleaned and assembledwith new cylinder liners, pistons, piston rings and overheadvalve train components. All aspects of the assembly arespecified.4.3 A forced oil drain, an oil sample and an oil addition,equivalent to an oil consumption of 0.064 g/MJ, is performedat the end
44、 of each 25 h period.4.4 The test stand is equipped with the appropriate instru-mentation to control engine speed, fuel flow, and other oper-ating parameters.4.5 Oil performance is determined by assessing crossheadwear, top ring mass loss, injector adjusting screw mass loss,sludge deposits, and oil
45、filter plugging.5. Significance and Use5.1 This test method was developed to assess the perfor-mance of an engine oil to control engine wear and deposits4For stock #TMCMNL20, visit the ASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org.5Available from Superintendent of Do
46、cuments, Attn: New Orders, P.O. Box371954, Pittsburgh, PA 15250-7954. Charge orders may be telephoned to theGovernment Printing Office order desk.D7468 153under heavy-duty operating conditions selected to acceleratesoot generation, valve train wear, and deposit formation in aturbocharged, aftercoole
47、d four-stroke-cycle diesel engineequipped with exhaust gas recirculation hardware.5.2 This test method can be used for engine oil specificationacceptance when all details of this test method are in compli-ance. Applicable engine oil service categories are included inSpecification D4485.5.3 The desig
48、n of the engine used in this test method isrepresentative of many, but not all, modern diesel engines. Thisfactor, along with the accelerated operating conditions needs tobe considered when extrapolating test results.6. Apparatus6.1 Test Engine Configuration:6.1.1 Test EngineThe Cummins ISM 500 is a
49、n in-linesix-cylinder heavy-duty diesel engine with 11 L of displace-ment and is turbocharged and aftercooled. The engine has anoverhead valve configuration and EGR hardware. It features a2002 emissions configuration with electronic control of fuelmetering and fuel injection timing. Obtain the test engine andthe engine build parts kit from the central parts distributor(CPD).6The components of the engine build parts kit areshown in Table A3.1. Non-kit parts are shown in Table A3.2.6.1.2 Oil Heat Exchanger, Adapter Blocks, and Block-offPlateThe oil heat exchan
