奥迪全系自学手册（SSP）：ssp424_Exhaust Gas Aftertreatment Systemgb.pdf

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1、ServiceTrainingSelf-studyProgramme424ExhaustGasAftertreatmentSystemSelectiveCatalyticReductionDesignandFunctionInadditiontothecontinuousimprovementofinternalWiththeSelectiveCatalyticReductionexhaustgascombustionwithintheengine,theglobaltighteningaftertreatmentsystem,Volkswagenismakingaofexhaustem

2、issionslimitsforpassengercarsandfurthercontributiontowardsenvironmentalandcommercialvehicleswithdieselenginesalsoclimateprotection.necessitatesincreasinglyhigher-performanceexhaustgasaftertreatmentsystems.S424_002Inthisself-studyprogramme,youwillobtaininformationonanexhaustgasaftertreatmentsystem

3、whichreducesharmfulnitrogenoxides(NOx)intheexhaustgasandisfittedinpassengercarswithdieselengines.Theself-studyprogrammeportraystheForcurrenttesting,adjustmentandrepairdesignandfunctionofnewdevelopments!nstructions,refertotherelevantserviceliterature.AttentionThecontentswillnotbeupdated.Note2Conte

4、ntsIntroduction.....................................................4Systemdesign...................................................8Functionalprinciple.............................................12Reducingagentinjection.........................................18Nitrogenoxidesensor..............

5、.............................22Reducingagent.................................................25Tanksystem....................................................26AdBlue®displayconcept........................................37Heatersystem..................................................42Functionald

6、iagram.............................................48Service........................................................50Testyourself...................................................533IntroductionSelectiveCatalyticReductioninthePassatBlueTDIThereductionofpollutantemissionsisanimportantInthereduct

7、ioncatalyticconverter,thenitrogenchallengeinautomotiveengineering.oxides(NOx)containedintheexhaustgasareInthepast,Volkswagenhasbeenextensivelyinvolvedconvertedintonitrogen(N2)andwater(H2O).Toinpushingforththedevelopmen