1、Designation:D 6202 02An American National StandardStandard Test Method forAutomotive Engine Oils on the Fuel Economy of PassengerCars and Light-Duty Trucks in the Sequence VIA SparkIgnition Engine1This standard is issued under the fixed designation D 6202;the number immediately following the designa
2、tion indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.INTRODUCTIONThis test method can be used by any pr
3、operly equipped laboratory,without outside assistance.However,the ASTM Test Monitoring Center(TMC)2provides reference oils and assessment of thetest results obtained on those oils by the laboratory(seeAnnexA1).By this means,the laboratory willknow whether their use of the test method gives results s
4、tatistically similar to those obtained by otherlaboratories.Furthermore,various agencies require that a laboratory utilize the TMC services inseeking qualification of oils against specifications.For example,the U.S.Army imposes such arequirement,in connection with several Army engine lubricating oil
5、 specifications.Accordingly,this test method is written for use by laboratories that utilize the TMC services.Laboratories that choose not to use those services may simply ignore those portions of the test methodthat refer to the TMC.This test method may be modified by means of Information Letters i
6、ssued by the TMC.In addition,the TMC may issue supplementary memoranda related to the test method.Users of this test methodshall contact the Administrator of TMC to obtain the most recent of these.1.Scope1.1 This test method covers an engine test procedure for themeasurement of the effects of automo
7、tive engine oils on thefuel economy of passenger cars and light-duty 3856 kg(8500lb),or less,gross vehicle weight trucks.The tests are conductedusing a specified 4.6-L spark-ignition engine on a dynamom-eter test stand.It applies to multiviscosity grade oils used inthese applications.Companion test
8、methods used to evaluateengine oil performance for specification requirements arediscussed in the latest revision of Specification D 4485.1.2 The values stated in either SI units or other units shall beregarded separately as the standard.Within the text,the SI unitsare stated first with the other un
9、its shown in parentheses.Thevalues 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.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theres
10、ponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.4 This test method is arranged as follows:SubjectSectionIntroductionScope1Referenced Documents2Terminology3Summary of Test Method4S
11、ignificance 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
12、Systems6.11Pressure Measurement and Pressure Sensor Locations6.12Engine Hardware and Related Apparatus6.13Miscellaneous Apparatus Related to Engine Operation6.141This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricantsand is the direct responsibility of Su
13、bcommitteeD02.B0on Automotive Lubricants.The multi-cylinder engine test sequences wereoriginally developed in 1956 by anASTM Committee D02 group.Subsequently,theprocedures were published in anASTM special technical publication.The SequenceVIA was published as RR:D02-1364,dated August 24,1995.Current
14、 edition approved June 10,2002.Published September 2002.Originallypublished as D 620297.Last previous edition D 620200a.2ASTM Test Monitoring Center,6555 Penn Ave.,Pittsburgh,PA 15206-4489.For other information,refer to RR:D02-1364 Sequence VIA Test Development.This research report and this test met
15、hod are supplemented by Information Lettersand Memoranda issued by the ASTM Test Monitoring Center.This editionincorporates revisions in all Information Letters through No.011.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.SubjectSection
16、Reagents 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 Filt
