奥迪全系自学手册（SSP）：SSP621_Audi A3 Sportback g-tron_EN.pdf

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1、SelfStudyProgramme621ForinternaluseonlyAudiA3Sportbackg-tronAudiServiceTrainingTheAudi A3 Sportback g-tronshowcasesstate-of-the-artCNGTheengineintheAudi A3 Sportback g-tronisbasedonthe90 kWdrivetechnology,startingwiththefuelstorage.Itstwotanks1.4TFSI.Modificationsweremadetothecyli

2、nderhead,turbo-undertheluggagecompartmentfloorcaneachhold7.2kgofcharging,injectionsystem,andthecatalyticconverter.DevelopingCNGatamaximum200barpressurereferredto15°C.81kW(110hp)and200Nmoftorque,theAudiA3SportbackInkeepingwithAudi'sultra-lightweightconstructionprinciple,g-tronhasat

3、opspeedof190kph,with0to100kphtakingeleveneachtankweighs27kglessthanitsconventionalsteelcounter-seconds.Thefive-doormodelconsumesonaveragelessthanpart.TheCNGtanksmadefromanenhancedplasticmatrix.A3.5 kgper100kmofCNG.COtailpipeemissionsarelessthan2gas-impermeablepolyamidepolymerforms

4、theinnerlayer,while95 gramsperkmingasmode.asecondlayerofcarbonfiber-reinforcedpolymer(CFRP)givesthetankitsextremelyhighstrength;athirdlayerofglassfiberrein-forcedpolymer(GFRP)providesprotectionagainstexteriordamage.High-strengthepoxyresinisusedtobindthefibre-reinforcedmaterials.Th

5、eelectronicgaspressureregulatorreducesthehighpressureofthegasflowingfromtheCNGtanksdowntoaroundfivetoninebarintwostages.Thisensuresthattherightpressureisalwayspresentintheinjectorrailandattheinjectorvalves.IfthepressureintheCNGtanksdropsbelowtherequiredlevel,theengineman-agementsy

6、stemautomaticallyswitchestopetroloperation.Aftere-mediarefueling,andwheneveritisverycold,theengineisstartedwithpetrolinitially,thenitswitchesovertoCNG.ThisSSPcontainsQRcodeswhichyoucanusetoaccessadditionalinteractivecontentseepage39.621_004Learningobjectivesofthisselfstudyprogramm

7、e:ThisSelf-StudyProgrammeprovidesyouwithinformationabout•WhatarethecomponentsoftheCNGsystem?theCNGsystemintheAudi A3 Sportback g-tron.Onceyouhave•HowisauthorisedtocarryoutworkontheCNGsystem?completedthisSelfStudyProgrammeyouwillbeabletoanswer•HowdoyouidentifyanAudi A3 Sportback g-

8、tron?thefollowingquestions:NoteTh