蓝色效能资料(BENZBlueTec)

Insertpictureofsize215x149mmonspecifiedpageExhaustAftertreatmentBlueTECwithAdBlue®SystemDescriptionofEngine642.8–Thisprintoutwillnotberecordedbytheupdateservice.Status:07/2009–AdBlue642.8DaimlerAG·TechnicalInformationandWorkshopEquipment(GSP/OI)·D-70546StuttgartExhaustAftertreatmentBlueTECwithAdBlue®SystemDescriptionofEngine642.8TechnicalInformationBulletinforService–Thisprintoutwillnotberecordedbytheupdateservice.Status:07/2009–642.8AdBlue3BlueTECexhaustaftertreatmentwithAdBlue®bContentsPreface5OverallsystemIntroduction6In-enginemeasures9ComparisonofBlueTECexhaustsystemvariants10Systemoverview12Emissionsclasses–Componentsused14SystemcomponentsOverviewofcomponents15AdBlue®controlunit16AdBlue®deliverymodule18AdBlue®tank20OtherAdBlue®components21Oxidationcatalyticconverter22Dieselparticulatefilter23NOxstoragecatalyticconverter25SCRcatalyticconverter27NOxcontrolunitwithNOxsensors28–Thisprintoutwillnotberecordedbytheupdateservice.Status:07/2009–ϟϟϟϟContents4BlueTECexhaustaftertreatmentwithAdBlue®bDriverinformationInstrumentcluster/serviceindicators30OperatingfluidAdBlue®32WorkshopequipmentExhaustaftertreatment38Body41FAQFrequentlyAskedQuestions42Listofabbreviations47Index48–Thisprintoutwillnotberecordedbytheupdateservice.Status:07/2009–6BlueTECexhaustaftertreatmentwithAdBlue®bOverallsystemIntroductionEnvironmentalauthoritiesaroundtheworldareaimingformassivereductionsinthelevelofemissionsproducedbydieselvehicles.TheintroductionoftheEURO6exhaustemissionsstandardisintendedtoreducepollutantemissionse.g.nitrogenoxidesby54%comparedtoEURO5.Anoxidationcatalyticconvertercombinedwithadieselparticulatefilter(DPF)wasenoughtosatisfytheEURO4exhaustemissionsstandard.Morecompo-nentswerehoweverrequiredtomeettheEURO5emissionsstandard.ThetechnicalcomplexityrequiredtocomplywiththeEURO6exhaustemissionvaluesismuchgreater.InJanuary2008,Mercedes-BenzintroducedtheE300CDIBlueTEC–thefirstvehicleintheEUwithBlueTECtechnology.AsofSeptember2009,Mercedes-BenzwillbeofferingfourmoremodelsfeaturingBlueTECtechnologyintheEUintheformoftheE-Class,M-Class,GL-ClassandR-Class.ThesevehiclesmeettheEURO6exhaustemissionsstandardandarebasedonthenewV6enginegeneration642.8.WithitsBlueTECtechnology,Mercedes-Benzhasbeenabletoheavilyreduceexhaustgasemissionswhileatthesametimemaintainingtheperformanceofthedieselenginesintermsoftorqueandpoweroutput.Firstpassengercardieselengine138,manuf.1936Low-techdesignofthefirstdieselengines:2.6ldisplace-mentwith33kWofpowerasusedintheMercedes-Benz260D,theworld'sfirstdieselpassengercar.Engine642.8Thedieselengine642.8ischaracterizedbyitshighlevelofcomplexity.With3.0ldisplacementand155kWofpower,itwillbeinstalledintheE350,ML350,andR350BlueTECvehiclesasofSeptember2009.IntheGL350BlueTECvehicles,engine642.8hasapoweroutputof160kW.–Thisprintoutwillnotberecordedbytheupdateservice.Status:07/2009–5NOx54%PDF)45620081E300CDIBlueTEC.20099EMGLR66642.81381936138260D2.6L33KW642.83.0L155KW64220099E350,ML350R350BlueTECGL350BlueTEC160KW642.8642.8Overallsystem7BlueTECexhaustaftertreatmentwithAdBlue®bIntroductionBlueTECtechnologyBlueTECisamodularemissioncontrolsystemwhichisavailableintwoversions:•OnthepreviousE300BlueTECsedan,theoxidationcatalyticconverterandtheparticulatefilterarecombinedwithaparticularlylong-lifeNSKandanadditionalSCRcatalyticconverter.•ThesecondversionwillbeusedonthenewmodelsE350,ML350,GL350andR350BlueTECasofSeptember2009.TheNSKisomittedonthisversion.However,AdBlue®issprayedintotheexhaustflowonthesevehicles.Thisreleasesammoniawhichreducesthenitrogenoxidestounharmfulmolecularnitrogen(N2)andwater(H2O)inthedownstreamSCRcatalyticconverter.Toallowthemtobedifferentiated,thetwoversionsaredesignatedasfollows:•BlueTEC(NSK)inmodelE300CDI•BlueTEC(SCR)inthemodelsE350,ML350,GL350andR350Additionaloperatingfluid–AdBlue®AdBlue®isrequiredasanadditionaloperatingfluidfortheBlueTECexhaustaftertreatmentsystem(SCR).Itiscarriedinaseparatetank.AdBlue®isanon-toxic,highlypure,colorless,synthet-icallymanufacturedureasolution.BenefitsfortheconsumerandtheenvironmentDuringcombustionofthefuel/airmixtureinadieselenginewhichisdesignedformaximumefficiencyandlowparticulateemissions,varyingconcentrationsofnitrogenoxides(NOx)areproduceddependingonthecombustiontemperatureandpressure.Ifanengineisdesignedtoproducelowernitrogenoxideemissions,itemitssootandthefuelconsumptionishigher.Engineswithanoptimizedefficiencylevelandhighercombustiontemperaturesinevitablyproduceagreaterproportionofnitrogenoxideintheirexhaust.BlueTECreducestheundesirablenitrogenoxidecomponentintheexhaustgasbyaddingAdBlue®.TheAdBlue®producesammonia(NH3),whichisconvertedintomolecularnitrogen(N2)andwater(H2O)intheSCRcatalyticconverteralongwiththenitrogenoxides(NOx)Combustioncanthenbedesignedformaximumefficiency,lowsootemissionsandthereforelowfuelconsumption.BlueTECisawear-freesystemthatislargelymaintenance-freeandthusoperatescost-effectively.iNoteVehicleswithNSKmustbeoperatedonsulfur-freedieselfuel(sulfurcontentT10ppm(partspermillion)).Ifthesulfurcontentis10ppm,theNSKwillbecontaminatedbysulfurdioxide(