M266发动机++附加内容.docx
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M266发动机++附加内容.docx
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M266发动机++附加内容
M266发动机附加内容
06.01.2009
M266发动机某些设备和功能目前还未能在中国市场应用,作为附加内容列出。
Partialloadventilation(turbochargedengine)
Ontheturbochargedengine,thepartialloadventilationtakesplaceovertheinterior
crankcaseduct,aswiththenaturallyaspiratedversions,fromthereoverahose
connectionwithcheckvalvetotheintakemanifold.
Fullloadventilation(turbochargedengine)
Duringfullloadventilation,thelineofthepartialloadventilationisclosedbythechargerpressurepresentonthecheckvalve.Theairseparatedfromoilinthecycloneseparator
isfedtothechargerairlineaftertheairfilter.
Freshair
Cycloneseparatorsareusedfortheseparationofblow-bygases.
Theblow-bygasesinthecycloneunitaresetintoarotatingmovementforthis.
Fullloadventilation
Theoilpartseparatesduetotheoccurringcentrifugalforcesanddripsbackintothecrankcase.
Partialloadventilation
1Engineblock
2Cylinderhead
3Three-partcylinderheadcover
4Intakemanifold
5Intakeairlineto
exhaustturbocharger
6Draintube
7Ventduct
8Venthose
9Checkvalve
10Cycloneseparator
11Partialloadventilationand
fullloadventilation
Integrationintovehiclenetwork—Turbochargedengine
Turbochargedenginelegend
1Activatedcharcoalcanister
2Fueltank
A1Instrumentcluster
A1e26CHECKENGINEindicatorlamp(USA)
A1e58Enginediagnosisindicatorlamp
A16Knocksensor
B4/3Tankpressuresensor(USA)
B6/1Camshafthallsensor
B11/4Coolanttemperaturesensor
B17/8Intakeairtemperaturesensor
B28Intakemanifoldpressuresensor
B28/5Pressuresensordownstreamofaircleaner
B28/6Pressuresensorupstreamofthrottlevalveactuator
B37Acceleratorpedalsensor
G2Alternator
G3/1Oxygensensorbeforecatalyticconverter
G3/2Oxygensensoraftercatalyticconverter
K100kIAirinjectionrelay(USA)
K100kKFuelpumprelay
K100kMStarterrelay
L5Crankshaftpositionsensor
M1Starter
M3/3Fuelfeedmodule(fuelpump)
M4/7Electricsuctionfanengine/airconditioningcontrolunit
withintegratedcontrol
M16/6Throttlevalveactuator
M33Electricairpump(USA)
N2/7Restraintsystemscontrolmodule(SRS)
N3/10Enginecontrolunit(SIM 266)
N15/5ESMcontrolunit
N22AACcontrolandoperatingunit
N22/7ComfortAACcontrolandoperatingunit
N47-5ESPcontrolunit
N73EIScontrolunit
N80Steeringcolumnmodulecontrolunit
N93Centralgatewaycontrolunit
S40/3Clutchpedalswitch
S40/4Cruisecontrolswitch
S40/5Startenableclutchpedalswitch(USA)
S43/1Oilpressureswitch
S43/2Oilpressureswitchhigh
T1/1Ignitioncoilcylinders1/2
T1/2Ignitioncoilcylinders3/4
X11/4Datalinkconnector
Y3/9CVTelectrohydrauliccontrolunit
Y19/2Airconditioningwatervalve
Y31/5Boostpressurecontrolpressuretransducer
Y32Airpumpswitchovervalve(USA)
Y58/1Regenerationswitchovervalve
Y58/4Activatedcharcoalfiltershutoffvalve(USA)
Y62Fuelinjectionvalves
Y101Divertairswitchovervalve
Locationofcomponents(Turbochargedengine)
Y58/1PurgeControlValve
Coolantfeedline
Coolantreturnline
Oilreservoirventilation
Oilreturnline
T1/2
T1/1Ignitioncoil
B6/1Camshaft
positionsensor
7Oilreservoir
ventilation
8Coolantreturnline
6Oilreturnline
A16Knocksensor
B11/4Coolanttemperaturesensor
1Airfilterhousing
2Turbocharger
3Chargervacuumcell
4Damping
5Exhaustmanifold
6Turbochargeroilreturnline
7Turbochargeroilreservoirventilation
8Coolantreturnline
9Coolantfeedline
M16/6Throttlevalveactuator
N3/10Enginecontrolunit
1Airfilterhousing
2Oilfilterhousingwithoil-waterheatexchanger
3Intakemanifold
4Vacuumtank
S43/1Lowpressureoilpressureswitch
S43/2Highpressureoilpressureswitch
N3/10Enginecontrolunit
Pressuresensor(B28)—(Turbochargedengine)__Chargeairpipe/intakemanifold
Thepressuresensor(B28)islocatedontheintakemanifoldandsuppliesthecontrolunitwiththecurrentintakemanifoldpressure,whichisusedinconjunctionwiththeintakeairtemperature(B17)forthecalculationoftheairvolume.
Thepressuremeasurementrangeis0.2to2.5bar.
Thispressuresensorismarkedwithabluesticker.
Intakeairtemperaturesensor(B17)—(Turbochargedengine)
Theintakeairtemperaturesensor(B17),locatedintheintakemanifold,capturestheintakeairtemperature,whichisused,togetherwiththeintakeairthrottle,bytheMESIMcontrolunitforthecalculationofthefedairvolume.
GT09.00_0021_C11
Ambientpressuresensor—(Turbochargedengine)
ThepressuresensorisintegratedintheMESIMenginecontrolunit(N3/10)andmeasurestheambientpressure.Thissignalisusedforheightadaptation.
Pressuresensor(B28/5)—(Turbochargedengine)__Downstreamofaircleaner
Thepressuresensor(B28/5)islocatedintheairlinebetweentheairfilterandturbochargerandcapturesthecurrentintakemanifoldpressurebeforetheturbocharger.
Thissignalisreadintheenginecontrolunitandisusedfortheprotectionoftheturbochargerwiththesignalofthepressuresensor(B28/6).
Thispressuresensorismarkedwithagreensticker
P07.04-2407-01
Pressuresensor(B28/6)—(Turbochargedengine)__Upstreamofthrottlevalve
Thepressuresensor(B28/6)islocatedinthechargeairpipebetweenthethrottlevalveactuatorandturbochargerandcapturesthecurrentchargerpressure.
Thissignalisthemaincontrolvariableofthechargepressureregulation(max.boostpressure0.7bar)
Thepressuremeasurementrangeis0.2to2.5bar.
Thispressuresensorismarkedwithabluesticker.
P07.04-2407-01
Turbochargedengineairducting
Anexhaustturbochargerwithchargeaircoolingisusedforthecompressionandcoolingtoincreasethepowerandtorque.
Theairflowsfromtheairfilterthroughanairlinetotheexhaustturbocharger.
Theaircompressedinthechargerflowsthroughachargeairpipetothechargeaircooler,whichislocatedinfrontoftheengineasseeninthedirectionoftravel.
Afurtherchargeairpipeconnectsthechargeaircoolerwiththethrottlevalveactuator,whichislocatedonashortintakemanifoldbetweencylinder2
and3.
1Airfilter
2Airline
3Exhaustturbocharger
4Vacuumunit
Chargepressurecontrol
5Pulsationdamper
6Chargeairpipetochargeaircooler
7Chargeaircooler
8Chargeairpipetointakemanifold
9Intakemanifold
B5/1Chargerpressuresensor
B17Chargerairtemperaturesensor
B28Pressuresensor
B28/6Pressuresensorbeforethethrottlevalveactuator
AFreshair
BHotchargerair
CCooledchargerair
DExhaust
Turbochargedengineintakemanifold(chargeairpipe)
TheturbochargedengineintheAandB-Classhasashortintakemanifoldwithoutselectordrum(variableintakemanifold).Theintakemanifoldcontainsanintegratedvacuumtankforthelowpressure(vacuum)supply.
Acheckvalveisfittedinthevacuumsupplylinebetweentheintakemanifoldandthevacuumtank.
Thefittingdirectionmustbeobservedwhenfittingthevalve(markedbyanarrowonthevalve).
Themountsfortheintakeairtemperaturesensor,purgevalveandintakemanifoldpressuresensorarelocatedonthetopsideoftheintakemanifold.
Turbocharger,General
Thewater-cooledexhaustturbochargerfromBorgWarnerismadeofcaststeelandisweldeddirectlywiththeair-gapinsulatedsheetmetalexhaustmanifold(LSI),whichwasdevelopedespeciallyforthechargerengine.
Theturbochargerhasapneumatic(chargerpressure)actuatedwastegatevalveforcontrolofthechargerpressureaswellasadecelerationairvalvetoavoidwhistlingnoisesindecelerationmode.
1Exhaustturbocharger
2Vacuum(pressure)cell
3Pulsationdamper
4Decelerationairvalve
5Airgap-insulatedexhaustmanifold
6Oilreservoir
GT09.40_0033_C11
Note
Foroilleakageatturbocharger(ATL):
CleanoilyspotsontheATLandlocatetheleakusingcontrastspray.Itisusuallyonlytheconnectionsoftheoil-conductinglinesthatareleaky.Inthiscase,replacesealingringsofthebanjoboltsandtightentotheprescribedtorque.
Exhaustturbochargerdesign
Theexhaustgasesarefedthroughtheairgapinsulatedexhaustmanifold(LSI)intheturbinehousingontotheturbinewheel.Theflowenergyoftheexhaustgasescausestheturbinewheeltorotate.Thiscausesthecompressorturbine(impeller)wheel,whichisconnectedbyashafttotheturbinewheel,tobedrivenwiththesamerpm.Thefreshairsuckedinbythecompressorturbine(impeller)wheeliscompressedandfedtotheengine.
Theshafthousingoftheexhaustturbochargeriscoolant-cooledandconnectedtotheenginelubrication.
Anoilreceptacle(reservoir)preventsoilremaininginthebearingpointsoftheturboonextremetiltingofthevehicle.
ØMax.turbinespeedupto202,500rpm
ØMax.boostpressure0.7bar
1Turbohousing
2Exhaustturbine
3Intakeairturbine
4Exhaustmanifold
5Catalyticconverter
Weldingarea
Thecombinationofexhaustmanifoldandturbochargeraswellastheperipheralcomponentssuchasthewastegateanddecelerationairvalveto
oneunitoffersthefollowingadvantages:
∙Compactdesign
∙Uniformtemperaturedissipationovertheexhaustmanifoldandchargerunit
∙Omissionofasealingpoint
∙Fasterresponseofthecatalyticconverter
Theexhaustturbochargerhasaboostpressurecontrolvalve,theso-calledwastegatevalve.Thisallowstheexhaustflowtocircumventtheturbineside,whichisusedfortheregulationofthechargerpressure.
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