奧迪培訓(xùn)包w12v發(fā)動(dòng)機(jī)pp

112235810671149

SeminarcontentEnginedesignTechnicaldataWconfigurationCrankdriveandcylinderheadsEnginelubricationEnginecoolingsystemEnginecontrolAlternatorIntakeandexhaustsystemsSecondaryairsystemandEGRExhaustsystemPracticaloperationsEngineassemblyServiceconceptOillevelcheckGeneratingreadinesscodeFinalcontroldiagnosisTechnicaldataEnginecode: AZC

Configuration: W-enginewitha

V-angleof15°anda

bankangleof72°

Cubiccapacity: 5998cm3

Max.output: 309kW(420PS)

at6000rpm

Spec.output: 51.5kW/l

70.0PS/l

Max.torque: 550Nm

at3500-4750rpm

Spec.torque: 91.7Nm/l

Bore: 84.0mm

Stroke: 90.268mm

Compression: 10.75:1

Fuel: unleadedEuroSuper95RON

unleadedSuperPlus98RON**

Ignitionsequence:1-12-5-8-3-10-6-7-2-11-4-9

Ignitioninterval: 60°crankshaft

Enginemanagement: MotronicME7.1.1

Emissionstandard: EU4

Serviceinterval: LongLife

max.30,000kmor

max.2yearsOutput[kW]Enginespeed[rpm]Torque[Nm]AudiA8L6.0quattroPermissibletotalweight(kg) 2530Permissiblefrontaxleload(kg) 1380Curbweight(kg) approx.2050 Permissiblerearaxleload(kg) 1190Wheelbase(mm) 3010Luggagecompartment(litres) 525Powertransmission quattro,five-stageautomaticAcceleration(s) 0-80km/h 4.3

0-100km/h 5.8Maximumspeed(km/h) 250Fueltank(litres.) approx.92Windscreenwasherreservoir(litres.) approx.4withheadlightwashersystem approx.7.0EngineoilChangequantitywithfilterchange 10.5FeaturesoftheW12-6.0l.are:-12cylinderpetrolengineinWconfiguration-engineblockandcylinderheadsmadefrom

aluminium-oilsupplybymeansofdry-sumplubrication-doubleoverheadcamshaftswith

4valvespercylinder,actuatedbymeansof

rollerrockerfingers-infinitelyvariablecamshafttimingcontrolfor

inletandexhaustcamshafts-6catalyticconverters-8lambdaprobesformonitoring

catalytic

convertersandcontrolofmixtureformationEnginemechanicalcomponentsCylinderblock/crankcaseTwoVsequal:Withalengthof513mmandawidthof710mm,thedimensionsoftheW12engineareascompactasthoseofaV8engine.Thisformsthebasisforasuperiordriveconceptwithrespecttoperformance,smoothrunningand4-wheeldrive.In-lineengineV-engineVR-engine

(V-enginewithnarrowV-angle)VR-engineVR-engineW-engineA-Splitintakemanifold(rightintakepipesfor

leftcylinderbankandviceversa)B-CylinderheadcoverC-Aluminiumcylinderheadwithcamshafts,

CSadjustersandvalvesD-Aluminiumcylinderblockwithoutadditional

cylinderlinersE-Bearingcrosspiecewithcast-inbearingblocksmadefromcastironF-UppersectionofsumpG-Uppersectionofsumpwithoilpumpanddistributionducts,oilfilterandoilcooleroutletCylinderblock/crankcaseCylinderbank1Cylinderbank2BearingcrosspieceInordertofulfilthestringentacousticrequirements,itisnecessarytoachieveconstantbearingclearancethroughouttheentireoperatingtemperaturerange.

Thus,themainbearingblocksofnodularcastironarecastintotherigidlyconstructedaluminiumbearingcrosspiece,toformapositivefit.Eachofthemainbearings(17mminwidth)issecuredby4stretchboltswithM8thread.Bearingcrosspiece(aluminium)Mainbearingweb(castiron)ConnectingwebThe"fanned"arrangementofthecylinderboresinconjunctionwiththeV-angleof15°andthecylinderbankangleof72°,resultsinanextremelycompactandtorsionallyrigidcylinderblock.ThecylinderaxesareoffsetwithrespecttotheaxisofrotationofthecrankshaftinordertopreventoverlapneartheBDCposition.Theoffsetarrangementofthecylindersmakesconstructionaldemandsonthe

-crankdrive

-pistons

-valvegearTheoffsetdimensionsare:-unevencylinders1-3-5-7-9-11 -12.5mm-evencylinders2-4-6-8-10-12+12.5mmEnginemechanicalcomponentsThecompact,shortcrankshaftdesignfeaturessevenmainbearings.Twoconrodsaremountedbetweeneachadjacentpairofmainbearingshells.TheV-angleof15°andthecylinderbankangleof72°resultinanextremelycompactdesign.Thewidthoftheconrods(13mm)andtheassociatedbearings(12mm)isextremelylow.CrankdrivePistons&conrodsThepistonsruninaluminiumcylinderlinerswhichareelectroplatedwithanironalloy.TheslopingdesignofthepistonsresultsfromtheV-arrangementandthedesignofthecylinderheads.Thecommoncylinderheadsurfaceforbothcylinderrowsofonebank,resultsinasymmetricalcombustionchambers.

Inordertoachievesymmetricalcombustionchambers,thepistoncrownsareinclined.

Theinclineisdeterminedbytheinstallationdirection.Duetothecompactdesignofcylinderblockandcrankshaft,thewidthoftheconrodbigends(13mm)isextremelylow.Twooilgroovesintheconrodbearingcapprovideforoiloutlet.DrainageapertureCylinderwallOilboresinconrodforlubricatingpinOilreturngroovesPistons&conrodsTheconnectionoftheconrodtothepistonisofatrapezoidaldesigninordertoreducetheoscillatingmass.Theconrodsareofaverynarrowdesign,havealowbearingsurface,arecutandgroundand,forthisreason,aresecuredusingfittedstretchbolts.SputterbearingThree-componentbearingTrapezoidalshapeofupperconrodbearing(pistonpin)ConrodbearingfittedboltsAspecialfeatureisthemethodofconnectionoftheengineblocktothegearbox.Thetwouppergearboxmountingpointsarerouted,assupports,throughthetimingchaincover.Sealingofthesupportsisachievedbymeansofradialsealingrings.TheW12enginefeaturesavisibleTDCmarking.Thecrankshaftcanbelockedinthe1stcylinderTDCpositionbymeansofadriftintherearleftofthebearingcrosspiece.

Thedriftengagesinthecrankshaftwebofthe12thcylinder.RadialsealingringsTimingchaincoverBorefordriftEnginelubricationAnotherspecialfeatureisthedry-sumplubrication.

Theoilpumpsuppliesoiltotheenginefromaseparateoilreservoir.Advantages:Absolutelyreliableoilsupply,especiallyunderseveredrivingconditions,e.g.extremelongitudinalandlateralaccelerationLowaircontentinpressureoilLowoiltemperatureLowengineheightduetolowoilsumpvolumeLargedifferencebetweenminimumandmaximumoillevelOilpumpTheoilpumpunitconsistsofthreeseparategearpumps.Driveisviaasimplexchaindirectfromthecrankshaftwitharatioofapprox.1.5:1.Thefrontgearpumpservesasoilpressurepump,whereasthecentreandreargearpumpsareoilsuctionpumps.

Inordertoensureoilreturntothereservoir,thedeliveryrateoftheoilsuctionpumpsisapprox.1.5timesthatoftheoilpressurepump.

Theoilsuctionpumpsareinternallyconnectedonthepressuresideanddeliveryisviaacommonconnectiontothereservoir.IntermediateplateDrivechainsprocketSuctionstage

screen2Suctionstage

screen1Suctionstage

suctionconnectionPressurestagePressurestage

suctionconnectionOilpressurecontrolvalveIdlershaftDrivechainsprocketDriveshaftOilsuctionpumpOilpressurepumpOilcircuitinlowerpartofengineOilreturningfromthelubricationcircuitisdrawnoutoftheextremelylowcross-sectionsumpbytheoilsuctionpumpandisdeliveredtothereservoir.Theoilpressurepumpdrawsthesettledandcooledoiloutofthereservoiranddeliversittotheengineoilcircuit.

Fromtheoilcooler,theoilinthebottomofthesumpflowstotheoilfilter.

Afterfiltering,theoilflowsbackintothebottomofthesumpand,fromthere,tothemainoilductintheupperpartofthesump.Fromthemainoilduct,oilissuppliedtothemainbearingsandpressureoilissuppliedtothecentraloilductlocatedwithinthecylinderbanksviaariseronthefrontside.Screen2Screen1OilcircuitInthecylinderheads,theoilflowbranchesouttothecamshaftadjustersand,viatherestrictorsinthecamshafthousings,tosupplytheCSbearingsandhydraulicelements.Camshafts

bank1Camshafts

bank2OilreturnvalvesSpraynozzlesforpistoncoolingMaincrankshaftbearingsMainoilductOilpumpLowerpartofoilsumpFeedReturnDirectionoftravelOilflowsfromthemainductintheupperpartofthesump,intothebearingcrosspieceandthustothemainbearingsfrombelow.Here,itenterstheoilgroovebetweenthelowerbearingblockandthelowerbearingshell.

Theoilgroovecontinuesbetweentheupperbearingblockandtheupperbearingshell.

Incontrasttothelowerbearingshell,theuppershellhasthreeboresthroughwhichtheoilcanemergeontotherunningsurfaceofthebearing.Agrooveintheupperbearingshellprovidesforadequatelubricationoftheconrodbigendbearing.Thecrankshaftoilsupplyisnoteworthy.OilsupplyPressureoilsupplyfromthree-chamberpumpBearingshellwithcontinuousoilgrooveBearingshellPressureoilductPressureoilsupplyOilsupplyforpistoncoolingOilreservoirwithcycloneOilwhichhasbeendegassedbythecycloneflowstotheoilsettlingsection.

Theoillevel/temperaturesenderG266andtheengineoiltemperaturesenderG8arelocatedhere.Thesettledoilflowsoutofthereservoir,viathesuctionpipetotheoilcooler.Note:

Duetothedry-sumplubrication,extractionoftheoilbysuctionisnotpossible.CycloneOildipstickOilfillerport/cylinder-headventilationCrankcasebreatherpipeOilsettlingplateOilreturnlineSenderforengineoiltemperatureG8inoilreservoir(integrated)SuctionpipeconnectionOildrainplugSenderforoillevel/temperatureG266OilreturnaftersettlingincycloneOillevelOillevelwithenginenotrunningOillevelduringdrivingThefollowingapplies:

Theoillevelinthereservoirfallswith increasingenginespeed.

Theoillevelinthereservoirriseswith increasingoiltemperature.DynamicoillevelcheckDuringdriving,theoillevelisdeterminedviatheoillevel/temperaturesenderG266.

Iftheoillevelfallsbelowtheminimum,awarningappearsintheFIS.

Afterthewarningilluminates,1litre

ofVWStandard50301engineoilmustbeadded.StaticoillevelcheckPreconditionsVehicleparkedonlevelgroundEngineatoperatingtemperatureEngineidlingVAS505101engineelectronics-08,channel134-Q,Displayzone1,engineoiltemp.

min.80°IgnitionoffTheoillevelcheckmustbecompletedwithin2minutesofswitchingOFFtheignition.Oilchangequantitywithfilterapprox.10.5litresTheW12enginemustbefilledwithoilaccordingtoVWStandard50301duringinspectionserviceandLongLifeservice.Onlyinexceptionalcircumstances,iftheoillevelwarninginthedashpanelinsertilluminatesandVW50301isnotavailable,isitpermissibletotopuponcewithupto0.5litreofoilaccordingtoVWSpecification50200.OillevelMINat5thnotchOillevelMAXat8thnotch1notchcorrespondstoapprox.0.3lMaxMinabcZOildipstick07C115611HApplicationwithoilreservoirassembly07C115373GMaxMinabcModifiedoildipsticka-Oilmustnotbeadded.b-Oilmaybeadded.

MustnotexceedMaxmarking.c-Oilmustbeadded.

Theoilleveliscorrectifinareabaftertoppingup.CylinderheadBoltsofdifferentlengthsareusedtosecurethecylinderheadstothecrankcase:Bank1:

7shortand13longBank2:

7shortand14longSealingwiththecrankcaseiseffectedviaamultilayerribbedmetalgasket.Eachvalvecovergasketconsistsofarubberseal.Liquidsealantisusedonthesealingsurfacesfortheintakepipes.CamshaftforinletvalvesCamshaftforexhaustvalvesIntakeductExhaustductValvetimingdriveThevalvetimingdriveislocatedonthedriveendoftheengine.Correctchaintensionisensuredbymeansofthreepre-tensioned(viaspringpressure)hydraulicchaintensionerstogetherwiththechainguides.Oilsprayholesinthechaintensionerguiderailsprovideforadequatelubricationandcoolingofthechains.CylinderheadjoinGuiderailChaintensioner

Bank2GuiderailChaintensioner

Bank1Chaintensioner

cylindercrankcaseGuiderailIntermediateshaftDoublesprocketJoin,cylindercrankcase/crosspieceSimplexchain

Bank1Simplexchain

Bank2DuplexchainIntermediateshaftTheintermediateshaftprovidesforasimplecamshaftdrivesystem.SprocketshaftLockingpinSprocketfordoublechaindriveSprocketforcamshafttimingcontrol,bank1Sprocketforcamshafttimingcontrol,bank2Theretainingplateforthebearingshaftisboltedtothecylindercrankcase.

Thisisnotincludedintheexplodedview.SecuringboltRibbedbeltRemovingInordertoremovetheribbedbelt,thelockcarriermustbepulledforwards.

Forthispurpose,theboltsofspecialtool3369areused.Marktherunningdirectionbeforeremovingtheribbedbelt.Checkalignmentusinggauge3201InstallingFirst,positiontheribbedbeltonthealternatorpulleyandontheotherpulleysandlastly,onthetensioner.Followingsuccessfulrepair,theheadlightbasicsettingmustbeperformed.WaterpumpGuidepulleysTensionerA/CcompressorAlternatorBracketforalternatorandoilfilterPowersteeringfluidpumpCoolingsystemThecoolingsystemconsistsofthefollowingcomponents:Mechanicalwaterpumpinthecylindercrankcase,drivenviaaplasticV-beltElectricmap-controlledauxiliarywaterpumptoassistthemechanicalwaterpumpandforrun-oncooling.Electronically-controlledcoolingsystem(map-controlledcoolantthermostat)Map-controlledhydraulicfanand300WelectricfanMap-controlledrun-oncoolingWater-cooledalternatorInstallationconditionsintheAudiA8

necessitatedspecialcarewiththe

enginecoolingsystemHeaterreturnhoseHeaterfeedhoseConnectionforoil/watercoolerincylindercrankcaseHousingwiththermostatvalveBreatherpipeforcylinderheadOilwatercoolerRadiatorAuxiliarywaterpumpV51RadiatorfeedRadiatorreturnNon-returnvalveAlternator(watercooled)AlternatorcoolantreturnhoseAlternatorcoolantfeedhoseRadiatorbreatherpipeCompen-

sationtankBreatherpipeConnectionforalternatorcoolantcircuittocylindercrankcaseCoolingsystemwithoutauxiliaryheaterTheauxiliarycoolantpumpV51performstwotasks:1.Atlowenginespeeds,V51assiststhemechanically-drivenwaterpumpinordertoensurecoolantcirculation.

Activationismap-controlledfromthemastercontrolunitJ623,viarelayJ496.Requiredparametersare:

enginespeed

coolanttemperatureG622.Circulationofcoolantduringcoolingrun-on.CompensationtankRadiatorThermostatF265Pumpvalveunit

N175,N176Temp.senderATFcoolerOil/watercoolerBleedscrewsAlternatorInordertomeetthedemandforincreasedalternatorperformance,awater-cooledalternatorisused.Advantages:190Aat6000rpm(150Aforanair-cooledalternator)NoaerodynamicflownoiseApplicationathighenginecompartmenttemperaturesHighperformancedensityduetoadditionalpermanentmagnetsintherotor,betweenthepoleclawsWaterjacketPermanentmagnetsHydraulicfanThesolenoidvalveforfancontrolN313,actuatedbythemastercontrolunit,controlsfluidflowtothehydraulicmotorandenablesinfinitelyvariablecontrolofthefanspeed.N313isopenintheabsenceofcurrent.

Thehydraulicfanthenachievesitsmaximumspeedof2800rpm.Duetopumplosses,thefollowingappliesforconstantpumpspeed:Highfluidtemperature-lowfanspeedLowfluidtemperature-highfanspeedNewfeature:acquisitionofhydraulicfluidtemperatureviaG382.Foracousticreasons,thefanspeedshouldnotexceedapprox.2100rpm.Duetothedeterminationoffluidtemperature,moreprecisecontrolispossibleandtheperformancepotentialisoptimallyexploiteduptoconveniencespeed.SteeringgearFluidreser-

voirReturnhoseforhydraulicmotorBranchSuctionhoseforsteeringgearSuctionhoseforhydraulicmotorPressureswitchforpowersteeringF88?PowersteeringtandempumpFluidcoolerHydraulicmotorTemperaturesensorG362HydraulicmotorexpansionhoseSteeringgearfeedhoseFluidreservoirreturnhoseDirectionoftravelSystemoverviewSensors/actuatorsPre-cat.lambdaprobesG39/108Post-cat.lambdaprobesG130/131AcceleratorpedalpositionsenderG79/185SenderforambienttemperatureG42/70Auxiliarysignals:

SwitchforCCSE45

SenderforradiatorfancontrolG382Enginecontrolunit(Master)J623Knocksensors1+2

G61/66EnginespeedsenderCoolanttemperaturesenderG2BrakepedalswitchF47Hallsendersfor

camshaftG40/G300

AnglesenderforthrottlevalvedriveG297/298Pre-cat.lambdaprobesG285/286Post-cat.lambdaprobesG287/288Airmassmeter2G246HallsendersforcamshaftG163/G301Knocksensors3+4

G198/199Terminal50

Enginespeedincrease

Crashsignal

A/Ccompressor

A/Chigh-pressureswitch

Electricfan

ThrottlevalvecontrolunitJ544InjectorsN30,31,32,83,84IgnitioncoilswithoutputstageN70,127,291,323,324SecondaryairinjectionvalveN112SolenoidvalveforactivecharcoalcanisterN80ValveforexhaustflapN321CoolantpumpV51ValveforradiatorfanN313ValveforcamshafttimingcontrolN205/318IgnitioncoilswithoutputstageN325,326,327,328,329,330SolenoidvalveforelectricenginemountingN145InjectorsN85,86,299,300,301,302SecondaryairinjectionvalveN320MotorforsecondaryairpumpV101ThrottlevalvecontrolunitJ338SolenoidvalveforactivecharcoalcanisterN333Motorforsecondaryairpump2V189ValveforcamshafttimingcontrolN208/319SolenoidvalveforelectricenginemountingN144Enginecontrolunit(slave)J624AnglesenderforthrottlevalvedriveG187/188Controloftheinjectionandignitionsystemsisviatwoenginecontrolunits.Enginecontrolunit1servescylinders1-6andenginecontrolunit2servescylinders7-12.ThecontrolunitscommunicatewithoneanotherviaCANdrivebus.Thecontrolunitsareidenticalandhavethesamepartnumber.

Softwareversionmustbeidentical.Note:

Determinationofspecifiedidlingspeedisperformedinenginecontrolunit1.Displayofmisfiresforall12cylindersisperformedinenginecontrolunit2.Addressword:01Addressword:11Pin49PlussignalTerminal15Pin49MinussignalIntakesystemTheintakeportscrossinthecentreoftheintakepipe.

Thismeansthatthethrottlevalvecontrolunitandairmassmeterlocatedontherightsideinthedirectionoftravel(Bank1)servecylinderbank2andviceversa.Cutawayview:DiaphragmvalveSuctionjetpumpBrakeservoconnectionAirmassmeter2G246Airfilterunit,bank2,withsecondaryairpumpV189Tocombivalveforsecondaryairinjection,bank2Tocombivalveforsecondaryairinjection,bank1Airfilterunit,bank1,withsecondaryairpumpV101AirmassmeterG70withsenderforintaketemperatureG42InletforgassesfromactivecharcoalcanisterandoilreservoirventingDiaphragmvalveforoilreservoirventingCombivalveforsecondaryairinjection,bank1SecondaryairinjectorN112PressurecontrolvalveinfuelmanifoldNon-returnvalveVacuumconnectionforsuctionhoseSecondaryairinjector2N320VacuumreservoirCombivalveforsecondaryairinjection,bank2HallsenderG40,G163,G300,G301ForcontrolandmonitoringoftheCSadjusters,aHallsenderisfittedtoeachcamshaftforthepurposeofpositiondetection.InordertooptimallyadaptthevalvetimingtothediverseoperatingpointsoftheW12engine,theinletandexhaustcamshaftsarecontinuouslyadjusted.AdjustmentrangeofinletCS:52°(crankshaft)AdjustmentrangeofexhaustCS:22°(crankshaft)Valvetimingisoptimallyadjustedviaseparatemapsforthefollowingoperatingstates:

Quickwarm-upofcatalyticconverters Warm-upphase Operatingtemperature

Themapsrelateto:

Enginespeed

Engineload EnginetemperatureBank1Hall

senderInternalexhaustgasrecirculationWithinternalEGR,theexhaustgasesaredrawndirectlyoutoftheexhaustductandbackintothecombustionchamberatthestartoftheintakestroke.Thisisachievedbyappropriatetimingofinletandexhaustvalves.Thequantityofrecirculatedexhaustgasisdeterminedbythedegreeofso-called"valveoverlap".Advantages:

Shortresponsetime(shortpaths)

Highachievablerecirculationrate

Goodmixingofexhaustgaseswithfresh

gases

ReductioninnumberofcomponentsValveoverlapAtidlingspeedandinnear-idlingspeedrange,thereisnovalveoverlap.Inpartthrottlerange,theappropriaterequiredvalveoverlapisadjusteddependinguponloadandenginespeed.Infullthrottlerange,thecamshaftsareadjustedformaximumcylindercharging,dependinguponenginespeed.ocrankb.TDCocranka.TDCLoad,50%operatingtemperaturen[rpm]Load,90%operatingtemperatureOpeninlet

CloseexhaustValveoverlapocrankb.TDCocranka.TDC*Max.possibleadjustmentrange,

exhaustcrankshaft*Max.possibleadjustmentrange,

inletcrankshaftn[rpm]EnginemountingThehydraulicallydampedenginemountingswithelectricactuationpreventenginevibrationfrombeingtransferredtothebody,throughouttheentireenginespeedrange.Exhaustsystem123456789101112Theengineisequippedwithatotalof8lambdaprobes.Oneachcylinderbanktheretwolambdaprobesvisiblefromabove.

Thesearethepre-catalyticconverterprobes.

Thepost-catalyticconverterprobesarenotvisiblefromabove.Theenginemustberemovedforreplacementoftherespectivepost-catalyticconverterprobes.Post-catalyticconverterprobe2,exhaustbank4Post-catalyticconverterprobe2,exhaustbank3Post-catalyticconverterprobe2,exhaustbank2Post-catalyticconverterprobe2,exhaustbank1Pre-catalyticconverterprobes,exhaustbank1&2Pre-catalyticconverterprobes,exhaustbank3&4Exhaustbank3Exhaustbank4Exhaustbank2Exhaustbank1TothemaincatalyticconvertersExhaustsystemTheexhaustsystemconsistsoffourair-gapinsulatedexhaustmanifolds;twoforeachcylinderhead.

Theseareconnectedtotwocatalyticconverters(oneachside)withfrontpipes.Formonitoringpurposes,onepreandonepost-catalyticconverterprobearefittedforeachcatalyticconverter.Inordertoremovetheprimaryandmaincatalyticconvertersandtheintermediatepipes,theenginemustfirstberemoved.

Theexhaustsystem,uptothemaincatalyticconverters,ispre-installedbeforeengineinstallationandisalignedintheremovedconditionbymeansofnumerousmeasurements.

SeeWorkshopManual.Thecontrolledexhaustflapislocatedinthefrontpartoftherighttailpipe.Primarycatalyticconverter,

cylinders7-9Primarycatalyticconverter,

cylinders10-12X-pipeconnectionRearsilencerExhaustflapNoise-optimised

twin-scrolltailpipeCentresilencerMaincatalyticconverters(3-way)Primarycatalyticconverter,

cylinders4-6Primarycatalyicconverter,cylinders1-3Thepurposeoftheexhaustflap,whichisinstalledintherighttailpipeoftherearsilencer,istopermitconformancetostatutorynoiselegislationduringidlingandinthelowerenginespeedrange.Ifavacuumispresentatthevacuumunit,theexhaustflapisclosed.

Intheabsenceofvacuum,theexhaustflapisheldopenbyspringpressure.

Thismethodofactuationhasbeenchosentoprotecttherearsilenceragainstpossibleoverheatingintheeventofasystemfailure.TheexhaustflapvalveN321islocatedontheleftsideoftheluggagecompartment,belowtheCDchangerandisactivatedbyenginecontrolunit1.ExhaustflapDiaphragmvalvesforoilreservoirventingCylinderbank2CylinderheadventpipeCrankcaseandoilpumpventpipeOilreservoirOildipstickBaffleseparatorOilreservoirventhose

Cylinderbank1Engineventing

SystemoverviewOilreservoirventpipeOilreturntoreservoirVentpipe*3SlavemakesCANdataavailabletomaster*2MastermakesCANdataavailabletoslaveECU*1Additionalinformationinmaster/slavemessageEnginecontrolunit1

(mastercontrolunit)

–Intakeairtemperature

–Brakelightswitch1

–Brakepedalswitch

–Throttlevalveangle

–Electronicthrottlewarning

lampinfo.

–

Driver-specifiedtorque

–Faultstatus1

–Acceleratorpedalposition1

–CCSswitchposition

–CCSspecifiedspeed

–Altitudeinformation

–Switchoffcompressor

–CompressorON/OFF

(feedbackfrombi-directional

interface)

–Fuelconsumption

–Coolanttemperature1

–Idlingrecognition

–Engineshut-offposition2

–Enginespeed

–ACTUALenginetorques

–Emergencyoperation

programmes

(informationviaself-

diagnosis)

–Oiltemperatureprotection

fromGOB

–Vmaxlimitationactive2

–Immobiliser

Enginecontrolunit2

(slavecontrolunit)

–RequestfaultlampEPC3

–RequestfaultlampOBD3

–Misfiredetection3

–Faultstatus3

–Oiltemperature(fromGOB)3

–Immobiliser3

Gearboxcontrolunit

-Torquegradientlimitation

(converter/gearboxprotection)

-Releaseadaption

idle-chargecompensation

-Switchoffcompressor

-Specifiedidlespeed

-Currentgear/targetgear

-SPECIFIEDenginetorque

-Emergencyoperationprogrammes

(informationviaself-diagnosis)

-Gearchangeactive/notactive

-Selectorleverpostion

-Converterclutchstatus

ESP/ABScontrolunit

-TCSrequirement

-SPECIFIEDTCSengaging

torque

-Brakepedalstatus

-EPSengaging

-OTLrequirement

-OTLengagingtorque

Dashpanelinsert

-Selfdiagnosisinformation

-Drivingspeed

-Coolanttemperature

-Immobiliser(frommasterand

slavecontrolunits)

Steeringanglesensor

-Steeringangle

(isusedforpre-controlofthe

idlecontrolandfortorque

calculationbasedonpower

requirementofpowersteering)

CandriveHighCandriveLowServiceschedules

Telematics:

RenewemergencybackupbatteryServiceschedule-48monthsInaccordancewithadditionalwork,theemergencybackupbatterymustbechangedevery48months.Important:

Activatetheservicemodeofthetelematicscontrolunitbeforedisconnectingthebattery.Handsetentry:*#4610#Toquitservicemode:

Press"Navi"buttononceFollowingconnection,thebasicsettingdescribedintheOwner'sManualmustbeperformed.ObservepreconditionsIgnitionONAddressword11 ECUII

02 05 04 060DK ADPOK 06Addressword01 ECUI 02 05 04

060DK ADPOK