1、Designation:D683713Standard Test Method forMeasurement of Effects of Automotive Engine Oils on FuelEconomy of Passenger Cars and Light-Duty Trucks inSequence VIB Spark Ignition Engine1,2This standard is issued under the fixed designation D6837;the number immediately following the designation indicat
2、es 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()indicates an editorial change since the last revision or reapproval.INTRODUCTIONThe test method described in this standard can be u
3、sed by any properly equipped laboratory,withoutoutside assistance.However,the ASTM Test Monitoring Center(TMC)3provides reference oils andassessment of the test results obtained on those oils by the laboratory(see Annex A1).By this means,the laboratory will know whether their use of the test method
4、gives results statistically similar to thoseobtained by other laboratories.Furthermore,various agencies require that a laboratory utilize the TMCservices in seeking qualification of oils against specifications.For example,the American PetroleumInstitute(API)imposes such a requirement,in connection w
5、ith several U.S.Army engine lubricatingoil specifications.Accordingly,this test method is written for use by laboratories,which 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
6、 modified by means of Information Letters issued by the TMC.In addition,the TMC may issue supplementary memoranda related to the test method.Users of this test methodshall contact the TMC,Attention:Administrator,to obtain the most recent of these.1.Scope*1.1 This test method covers an engine test pr
7、ocedure for themeasurement of the effects of automotive engine oils on thefuel economy of passenger cars and light-duty trucks withgross vehicle weight of 3856 kg or less.The tests are conductedon a dynamometer test stand using a specified spark-ignitionengine with a displacement of 4.6-L.It applies
8、 to multiviscos-ity grade oils used in these applications.1.2 This test method also provides for the running of anabbreviated length test that is referred to as the VIBSJ.Theprocedure for VIBSJ is identical to the Sequence VIB with theexception of the items specifically listed in Annex A13.Theproced
9、ure modifications listed in Annex A13 refer to thecorresponding section of the Sequence VIB test method.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3.1 ExceptionsWhere there is no direct SI equivalentsuch as screw threa
10、ds,National Pipe Threads/diameters,tubingsize,or single source supply equipment specifications.BrakeSpecific Fuel Consumption is measured in kilograms perkilowatthour.In Figs.A2.4,A2.5,and A2.8,inch-pound unitsare to be regarded as standard.1.4 This standard does not purport to address all of thesaf
11、ety concerns,if any,associated with its use.It is theresponsibility 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.1.5 This test method is arranged as follows:SubjectSectionIntroductionScope1R
12、eferenced Documents2Terminology31This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.B0.01 on Passenger Car Engine Oils.Current edition approved May 1,2013.Published May 2013.Originallyapproved in 20
13、02.Last previous edition approved in 2010 as D6837 10.DOI:10.1520/D6837-13.2The multi-cylinder engine test sequences were originally developed in 1956 byanASTM Committee D02 group.Subsequently,the procedures were published in anASTM special technical publication.The Sequence VIB was published as Res
14、earchReport RR:D02-1469 dated April 8,1999.3ASTM Test Monitoring Center,6555 PennAvenue,Pittsburgh,PA15206-4489.For other information,refer to Research Report RR:D02-1469,Sequence VIB TestDevelopment.This research report and this test method are supplemented byInformation Letters and Memoranda issue
15、d by the ASTM TMC.This editionincorporates revisions in all Information Letters through No.091.*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 States1 SubjectSectionSummary of Test
16、Method4Significance and Use5Apparatus6General6.1Test Engine Configuration6.2Laboratory Ambient Conditions6.3Engine Speed and Torque Control6.4Dynamometer6.4.1Dynamometer Torque6.4.2Engine Cooling System6.5External Oil System6.6Fuel System6.7Fuel Flow Measurement6.7.2Fuel Temperature and Pressure Control tothe Fuel Flowmeter6.7.3Fuel Temperature and Pressure Control toEngine Fuel Rail6.7.4Fuel Supply Pumps6.7.5Fuel Filtering6.7.6Engine Intake Air Supply6.8Intake Air Humidity6.8.1Intake Air Filtra
