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GB 17691-2005 车用压燃式、气体燃料点燃式发动机与汽车排气污染物排放限值及测量方法(英文).pdf

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GB 17691-2005 车用压燃式、气体燃料点燃式发动机与汽车排气污染物排放限值及测量方法(英文).pdf

GB1769120051NationalStandardofthePeoplesRepublicofChinaLimitsandMeasurementMethodsforExhaustPollutantsfromCompressionIgnitionandGasFuelledPositiveIgnitionEnginesofVehiclesIII,IV,VReplaceofGB176912001ReplaceofpartofGB1476220021.SCOPEThisstandardstipulateslimitsandmeasurementmethodforgaseousandparticulatepollutantsfromexhaustgasofcompressionignitionC.I.enginesforroadvehicleuseandvehiclesequippedwithC.I.engines,andforgaseouspollutantsfrommotorvehiclesequippedwithpositiveignitionenginesfuelledwithnaturalgasNGorliquefiedpetroleumgasLPGandsuchengines.ThisstandardappliestotheC.I.enginesincludingpositiveignitionenginesfuelledwithgaseousfuelusedfordrivingmotorvehiclesofcategoriesofM2,M3,N1,N2andN3havingadesignspeedexceeding25km/handvehiclesofcategoriesM1havingatotalmassexceeding3500kg,andtothetypeapproval,theinspectionofconformityofproductionandtheinspectionofconformityofinservicevehicles.ThisstandarddosenotapplytotheC.I.enginesusedbycategoryN1andM2powerdrivenvehicleswhichareapprovedaccordingtoGB18352.32005LimitsandmeasurementmethodsforemissionsfromlightdutyvehiclesIII,IV.2.NORMATIVEREFERENCEThefollowingstandardscontainprovisions,which,throughreferenceinthistext,constituteprovisionsofthisstandard.Forundatedreferences,thelatesteditionofthedocumentreferredtoapplies.GB/T150891994MotorVehiclesandTrailersClassificationGB/T17692MeasurementMethodsofNetPowerforAutomotiveEnginesGB18047AutomotiveCompressedNaturalGasGB18352.32005LimitsandmeasurementmethodsforemissionsfromlightdutyvehiclesIII,IVGB/T19147AutomotiveDieselGB19159AutomotiveLiquefiedPetroleumGas3.TERMSANDDEFINITIONSForthepurposesofthisStandard,followingtermsanddefinitionsapply3.1exhaustpollutantsmainlyincludegaseouspollutantsandparticulatematters.GB1769120052GaseouspollutantsmeancarbonmonoxideCO,hydrocarbonsHCassumingarationofCH1.85fordiesel,CH2.525forLPG,CH2.93forNGNMHCandCH4forNGandoxidesofnitrogenexpressedinnitrogendioxideNO2equivalent.Particulatemattersmeananymaterialcollectedonaspecifiedfiltermediumafterdilutingtheexhaustwithcleanfilteredairsothatthetemperaturedoesnotexceed325K52.3.2vehiclesofcategoriesofM1,M2,M3,N1,N2,andN3accordingtoGB/T150892001vehiclesofcategoryM1refertothoseusedforthecarriageofpassengersandcomprisingnotmorethaneightseatsinadditiontothedriversseat.vehiclesofcategoryM2refertothoseusedforthecarriageofpassengers,comprisingmorethaneightseatsinadditiontothedriversseat,andhavingamanufacturerdesignedmaximummassnotexceeding5t.vehiclesofcategoryM3refertothoseusedforthecarriageofpassengers,comprisingmorethaneightseatsinadditiontothedriversseat,andhavingamanufacturerdesignedmaximummassexceeding5t.vehiclesofcategoryN1refertothoseusedforthecarriageofgoodsandhavingamanufacturerdesignedmaximummassnotexceeding3.5t.vehiclesofcategoryN2refertothoseusedforthecarriageofgoodsandhavingamanufacturerdesignedmaximummassexceeding3.5tbutnotexceeding12t.vehiclesofcategoryN3refertothoseusedforthecarriageofgoodsandhavingamanufacturerdesignedmaximummassexceeding12t.3.3testcyclemeansasequenceoftestpointseachwithadefinedspeedandtorquetobefollowedbytheengineundersteadystateESCtestortransientoperatingconditionsETC,ELRtest.3.4approvalofanengineoranenginefamilymeanstheapprovalofanenginetypeoranenginefamilywithregardtotheleveloftheemissionofexhaustpollutants.3.5compressionignitionenginemeansanenginewhichworksonthecompressionignitionprinciple.3.6enginefuelledwithgaseousfuelmeansanenginefuelledwithnaturalgasNGorliquefiedpetroleumgasLPG.3.7enginetypemeansacategoryofengineswhichdonotdifferinsuchessentialrespectsasenginecharacteristicsasdefinedinAnnexAtothisstandard.3.8enginefamilymeansamanufacturersgroupingofengines,which,throughtheirdesignasdefinedinAnnexABGB1769120053tothisstandard,havesimilarexhaustemissioncharacteristicsallmembersofthefamilymustcomplywiththeapplicableemissionlimitvalues.3.9parentenginemeansanengineselectedfromanenginefamilyinsuchawaythatitsemissionscharacteristicswillberepresentativeforthatenginefamily.3.10smokemeansparticlessuspendintheexhauststreamofadieselenginewhichabsorb,reflectorrefractlight.3.11netpowermeansthepowerobtainedonthetestbenchattheendofthecrankshaft,oritsequivalent,measuredinaccordancewiththemethodofmeasuringthepowerasdescribedinGB/T17962.3.12maximumnetpowerPmaxmeansthemaximumnetpowerdeclaredbythemanufacturerinhisapplicationfortypeapproval.3.13percentloadmeansthefractionofthemaximumavailabletorqueatanenginespeed.3.14ESCtestEuropeansteadystatecyclemeansatestcycleconsistingof13steadystatemodestobeappliedinaccordancewithsection7.2ofthisstandard.3.15ELRtestEuropeanloadresponsetestmeansatestcycleconsistingofasequenceofloadstepsatconstantenginespeedstobeappliedinaccordancewithsection7.2ofthisstandard.3.16ETCtestEuropeantransientcyclemeansatestcycleconsistingof1800secondbysecondtransientmodestobeappliedinaccordancewithsection7.2ofthisstandard.3.17engineoperatingspeedrangemeanstheenginerange,mostfrequentlyusedduringenginefieldoperation,whichliesbetweenthelowandhighspeeds,assetoutinFigure1.3.18lowspeednlomeansthelowestenginespeedwhere50ofthedeclaredmaximumpoweroccurs.3.19highspeednhimeansthehighestenginespeedwhere70ofthedeclaredmaximumpoweroccurs.3.20enginespeedsA,BandCmeansthetestspeedswithintheengineoperatingrangetobeusedfortheESCtestandtheELRtest,assetoutinAnnexBAtothisstandard.3.21controlareaGB1769120054meanstheareabetweentheenginespeedsAandCandbetween25to100percentloadrefertoFigure1.3.22referencespeednrefmeansthe100percentspeedvaluetobeusedforrenormalizingtherelativespeedvaluesoftheETCtest,assetoutinAnnexBBtothisstandard.3.23opacimetermeansaninstrumentdesignedtomeasuretheopacityofsmokeparticlesbymeansofthelightextinctionprinciple.3.24NGgasrange1meansthecalorificrangeofnaturalgas.Highrangereferstothehighcalorificrang,withaWobbeindexof44.754.7MJ/m3lowrangereferstothelowcalorificrange,withaWobbeindexof38.344.0MJ/m3.Section5.1.2ofthisstandardcontainsdetailprovisions.3.25selfadaptabilitymeansanyenginedeviceallowingtheair/fuelrationtobekeptconstant.3.26recalibrationmeansafinetuningofanNGengineinordertoprovidethesameperformancepower,fuelconsumptioninadifferentrangeofnaturalgas.3.27WobbeindexmeanstheratioofthecorrespondingcalorificvalueofagasperunitvolumeandthesquarerootofitsrelativedensityunderthesamereferenceconditionsWHGasGasAiy3.28shiftfactorS1ThisdefinitionisdefinedinaccordancewiththeclassificationofnaturalgasspecifiedinGB18047andEN437.ThereferenceconditionfortheWobbeindexis101.3kPaand20.GB1769120055meansanexpressionthatdescribestherequiredflexibilityoftheenginemeasurementsystemregardingachangeoftheexcessairrationiftheengineisfuelledwithagascompositiondifferentfrompuremethane.1002410012OmninertSwhereSshiftfactorinertthevolumepercentageofinertgasesinthefuelO2thevolumepercentageoforiginaloxygeninthefuelnandmtheaveragenumberofcarbonandhydrogeninthefuelCnHm3.29EEVmeansEnhancedEnvironmentallyFriendlyVehiclewhichisatypeofvehiclepropelledbyanenginecomplyingwiththepermissiveemissionlimitvaluesgiveninTable1andTable2insection7.2.1ofthisstandard.3.30defeatdevicemeansanydevicewhichmeasures,sensesorrespondsvehicleoperationparameterssuchasvehiclespeed,enginespeed,gearused,temperature,intakepressureorotherparameters,withaviewtoactivating,modulating,delayingordeactivatingtheoperationofanycomponentoftheemissioncontrolsystemsothattheeffectivenessoftheemissioncontrolsystemisreducedunderconditionsencounteredinnormalvehicleuse.Meanwhile,theuseofthesefunctionsofsuchdevicehasnotbeentypeapproved.Suchadevicewillnotberegardedasadefeatdeviceiftheneedforthedeviceisjustifiedtemporarilytoprotecttheengineagainstintermittentoperatingconditionsthatcouldleadtodamageorfailureandnoothermeasuresareapplicableforthesamepurposewhichdonotreducetheeffectivenessoftheemissioncontrolsystem.thedeviceoperatesonlywhenneededduringenginestartingand/orwarmingupandnoothermeasuresareapplicableforthesamepurposewhichdonotreducetheeffectivenessoftheemissioncontrolsystem.3.31auxiliarycontroldevicemeansasystem,functionorcontrolstrategyinstalledtoanengineoronavehicle,thatisusedtoprotecttheengineand/oritsancillaryequipmentagainstoperatingconditionsthatcouldresultindamageorfailure,orisusedtofacilitateenginestarting.Anauxiliarycontroldevicemayalsobeastrategyormeasurethathasbeensatisfactorilydemonstratednottobeadefeatdevice.3.32irrationalemissioncontrolstrategymeansanystrategyormeasurethat,whenthevehicleisoperatedundernormalconditionsofuse,reducestheeffectivenessoftheemissioncontrolsystemtoalevelbelowthatexpectedontheapplicableemissiontestprocedures.3.33onboarddiagnosticsystemOBDanonboarddiagnosticsystemforemissioncontrolwhichhasthecapabilityofidentifyingtheGB1769120056likelyareaofmalfunctionbymeansoffaultcodesstoredinECU.3.34onboardmeasuringsystemOBMmeansanemissionmeasuringsysteminstalledonthevehiclewhichhasthecapabilityofrealtimemonitoringtheemissionlevelofvehicleengine,identifyingandrecordingthemeasureddataofemissionofvehicleengine.3.35Abbreviations,SymbolsandUnits3.35.1SymbolsfortestparametersSymbolUnitTermAPm2CrosssectionalareaoftheisokineticsamplingprobeATm2CrosssectionalareaoftheexhaustpipeCEEEthaneefficiencyCEMMethaneefficiencyC1Carbon1equivalenthydrocarbonconcppm/SubscriptdenotingconcentrationD0M3/sInterceptofPDPcalibrationfunctionDFDilutionfactorDBesselfunctionconstantEBesselfunctionconstantEZg/kWhInterpolatedNOxemissionofthecontrolpointfaLaboratoryatmosphericfactorfcs1BesselfiltercutofffrequencyFFHFuelspecificfactorforthecalculationofwetconcentrationfordryconcentrationFSStoichiometricfactorGAIRWkg/hIntakemassflowrateonwetbasisGAIRDkg/hIntakemassflowrateondrybasisGDILWkg/hDilutionmassflowrateonwetbasisGEDFWkg/hEquivalentdilutedexhaustgasmassflowrateonwetbasisGEXHWkg/hExhaustgasmassflowrateonwetbasisGFUELkg/hFuelmassflowrateGB1769120057GTOTWkg/hDilutedexhaustgasmassflowrateonwetbasisHMJ/m3CalorificvalueHREFg/kgReferencevalueofabsolutehumidity10.71g/kgHag/kgAbsolutehumidityoftheintakeairHdg/kgAbsolutehumidityofthedilutionairHTCRATmol/molHydrogentocarbonratioiSubscriptdenotinganindividualmodeKBesselconstantkm1LightabsorptioncoefficientKH.DHumiditycorrectionfactorforNOxfordieselenginesKH.GHumiditycorrectionfactorforNOxforgasenginesKvCFVcalibrationfunctionKw,aDrytowetcorrectionfactorfortheintakeairKw.dDrytowetcorrectionfactorforthedilutionairKw.eDrytowetcorrectionfactorforthedilutedexhaustgasKw.rDrytowetcorrectionfactorfortherawexhaustgasLPercenttorquerelatedtothemaximumtorqueforthetestengineLamEffectiveopticalpathlengthmSlopeofPDPcalibrationfunctionmassg/horgSubscriptdenotingemissionsmassflowMDILkgMassofdilutionairsamplepassedthroughtheparticulatesamplingfiltersMdmgParticulatesamplemassofthedilutionaircollectedMfmgParticulatesamplemasscollectedMf,pmgParticulatesamplemasscollectedonprimaryfilterMf,bmgParticulatesamplemasscollectedonbackupfilterMSAMMassofthedilutedexhaustgaspassedthroughtheparticulatesamplingfilterMSECkgMassofsecondarydilutionairMTOTWkgTotalCVSmassoverthecycleonwetbasisMTOTW,ikgInstantaneousCVSmassonwetbasis

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