作者:标准资料网 时间:2024-05-21 17:29:16   浏览:9132   来源:标准资料网

【英文标准名称】:StandardTestMethodforEvaluatingAutomotiveSpark-IgnitionEngineFuelforElectronicPortFuelInjectorFoulingbyBenchProcedure
【原文标准名称】:通过电子孔燃料注射器污渣评价自动火花点火引擎燃料的标准试验方法
【标准号】:ASTMD6421-1999a(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1999
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D02.A0.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:basefuel;benchtest;depositcontroladditive;deposits(ininternalcombustionengines);electronicportfuelinjector(PFI);flowrate,hotsoak;injectorfouling;pintle;spark-ignitionenginefuel;testfuel;Automotiveenginefuels/oils;Basefuel;
【摘要】:DriveabilityproblemsinPFIautomobileswerefirstreportedin1984.Depositsarepronetoformonthemeteringsurfacesofpintle-typeelectronicfuelinjectors.Thesedepositsreducefuelflowthroughthemeteringorifices.Reductionsinmeteredfuelflowresultinanupsetintheair-fuelratio,whichcanaffectemissionsanddriveability.Whenheavyenough,thesedepositscanleadtodriveabilitysymptoms,suchashesitation,hardstarting,orlossofpower,oracombinationthereof,thatareeasilynoticedbytheaveragedriverandthatleadtocustomercomplaints.Themechanismoftheformationofdepositsisnotcompletelyunderstood.Itisbelievedtobeinfluencedbymanyfactors,includingdrivingcycle,engineandinjectordesign,andcompositionofthefuel.TheprocedureinthistestmethodhasbeenfoundtobuilddepositsinPFIsonaconsistentbasis.Thisprocedurecanbeusedtoevaluatedifferencesinbasefuelsandfueladditives.AstudyofPFIfoulingwasconductedinboththebenchtestandthevehicletestprocedurestoobtainacorrelation.ThevehicletestswereconductedasdescribedinTestMethodD5598.Thetestswereconductedonseveralbasegasolines,withandwithoutadditivesblendedintothesebasefuels.ThePFIbenchtestprovedtobereliable,repeatable,andagoodpredictorofPFIfoulingintestvehicles.StateandFederalLegislativeandRegulatoryAction8212;Legislativeandregulatoryactivity,primarilybythestateofCalifornia(see2.3)andthefederalgovernment(see2.4),necessitatetheacceptanceofastandardtestmethodtoevaluatethePFIdeposit-formingtendencyofanautomotivespark-ignitionenginefuel.RelevanceofResults8212;Theoperatingconditionsanddesignofthelaboratoryapparatususedinthistestmethodmaynotberepresentativeofacurrentvehiclefuelsystem.Thesefactorsmustbeconsideredwheninterpretingresults.TestValidity:ProceduralCompliance8212;Thetestresultsarenotconsideredvalidunlessthetestiscompletedincompliancewithallrequirementsofthistestmethod.DeviationsfromtheparameterlimitspresentedinSection10willresultinaninvalidtest.Engineeringjudgmentshallbeappliedduringconductofthetestmethodwhenassessinganyanomaliestoensurevalidityofthetestresults.1.1Thistestmethodcoversabenchtestproceduretoevaluatethetendencyofautomotivespark-ignitionenginefueltofoulelectronicportfuelinjectors(PFI).ThetestmethodutilizesabenchapparatusequippedwithBoschinjectorsspecifiedforuseina1985-1987Chrysler2.2-Lturbochargedengine.ThistestmethodisbasedonatestproceduredevelopedbytheCoordinatingResearchCouncil(CRC)forpredictionofthetendencyofspark-ignitionenginefueltoformdepositsinthesmallmeteringclearancesofinjectorsinaportfuelinjectionengine(seeCRCReportNo.592).1.2Thetestmethodisapplicabletospark-ignitionenginefuels,whichmaycontainantioxidants,corrosioninhibitors,metaldeactivators,dyes,depositcontroladditives,demulsifiers,oroxygenates,oracombinationthereof.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Approximateinch-poundunitsareshowninparenthesesforinformationpurposesonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulato......
【中国标准分类号】:E31
【国际标准分类号】:27_060_10
【页数】:9P.;A4
【正文语种】:英语