Technicaltraining. Productinformation. F48Powertrain BMWService Generalinformation Symbolsused Thefollowingsymbolisusedinthisdocumenttofacilitatebettercomprehensionortodrawattention toveryimportantinformation: Containsimportantsafetyinformationandinformationthatneedstobeobservedstrictlyinorderto guaranteethesmoothoperationofthesystem. Informationstatusandnational-marketversions BMWGroupvehiclesmeettherequirementsofthehighestsafetyandqualitystandards.Changes inrequirementsforenvironmentalprotection,customerbenefitsanddesignrendernecessary continuousdevelopmentofsystemsandcomponents.Consequently,theremaybediscrepancies betweenthecontentsofthisdocumentandthevehiclesavailableinthetrainingcourse. ThisdocumentbasicallyrelatestotheEuropeanversionofleft-handdrivevehicles.Someoperating elementsorcomponentsarearrangeddifferentlyinright-handdrivevehiclesthanshowninthe graphicsinthisdocument.Furtherdifferencesmayariseasaresultoftheequipmentspecificationin specificmarketsorcountries. Additionalsourcesofinformation Furtherinformationontheindividualtopicscanbefoundinthefollowing: • Owner'sHandbook • IntegratedServiceTechnicalApplication. Contact:[email protected] ©2015BMWAG,Munich ReprintsofthispublicationoritspartsrequirethewrittenapprovalofBMWAG,Munich Theinformationcontainedinthisdocumentformsanintegralpartofthetechnicaltrainingofthe BMWGroupandisintendedforthetrainerandparticipantsintheseminar.Refertothelatestrelevant informationsystemsoftheBMWGroupforanychanges/additionstothetechnicaldata. Informationstatus:June2015 BV-72/TechnicalTraining F48Powertrain Contents 1. DriveVariants.......................................................................................................................................................................................................................................1 1.1. Model.........................................................................................................................................................................................................................................2 1.2. Enginedesignation............................................................................................................................................................................................. 3 1.2.1. Engineidentification........................................................................................................................................................3 2. CoolingSystem................................................................................................................................................................................................................................4 2.1. Coolingmodule.........................................................................................................................................................................................................4 3. AutomaticTransmission..................................................................................................................................................................................................6 3.1. Designation......................................................................................................................................................................................................................8 3.2. Functiondiagram................................................................................................................................................................................................... 9 3.3. Ratios.................................................................................................................................................................................................................................... 10 3.4. Directshifting.......................................................................................................................................................................................................... 11 3.5. Coastinginidle..................................................................................................................................................................................................... 11 3.6. LaunchControl......................................................................................................................................................................................................11 3.6.1. Activationoflaunchcontrol.............................................................................................................................12 3.7. ConnectedShift.....................................................................................................................................................................................................12 3.7.1. Characteristicsandavailability....................................................................................................................12 3.8. NotesforService............................................................................................................................................................................................... 13 3.8.1. Specialtools.............................................................................................................................................................................13 3.8.2. Manuallyunlockingthedrivepositionlock............................................................................. 13 3.8.3. Availablereplacementparts............................................................................................................................14 4. xDrive..............................................................................................................................................................................................................................................................15 4.1. Introduction................................................................................................................................................................................................................. 15 4.1.1. Comparisonofall-wheeldrivesystems........................................................................................15 4.2. Systemcomponents.................................................................................................................................................................................... 17 4.2.1. Angulargearbox................................................................................................................................................................. 18 4.2.2. Propellershaft.......................................................................................................................................................................20 4.2.3. Rearaxledifferential....................................................................................................................................................23 4.2.4. Systemwiringdiagram............................................................................................................................................26 4.3. Function............................................................................................................................................................................................................................27 4.3.1. Longitudinaltorquedistribution............................................................................................................... 27 4.3.2. Operatingstrategy..........................................................................................................................................................29 4.4. NotesforService............................................................................................................................................................................................... 30 5. OutputShaft,Front..............................................................................................................................................................................................................31 F48Powertrain 1.DriveVariants TheF48isavailablewithxDrive.Thefollowinggraphicshowsthelayoutofthatversion. F48Drive IntheF48acompletelynewdriveunitisused,whichfitsperfectlywiththespatialfunctionalconcept oftheBMW X1thankstoitsmodel-specificdesign. ThenewBMWX1xDrive28iisoneofthefirstvehiclesofBMWwhichwillbedrivenbythebrandnew 4-cylinderengine.Itisapartofthenewlydevelopedmodularenginefamily.Itisalightweight,powerful andeconomicalengine,whichisequippedwithBMWTwinPowerTurbotechnology. Specialfeatures • New4-cylinderengines • Enginewithtransversemounting • xDrive • AllenginessatisfytheexhaustemissionstandardsSULEV 1 F48Powertrain 1.DriveVariants Thefollowinglistshowstheadvantagesofthedifferentdriveconcepts(forvehicleswithafront engine): Front-wheeldrive Rear-wheeldrive • Thedriveunitiscomparativelycompact • Smallturningcirclepossible,asno andisintegratedbetweentheaxle rearviewofthedriverequiredwiththe mounting,steeringandfootwell. steeredfrontaxle. • Largeandvariablespatialoffering • Noannoyingdriveinfluencesinthe thankstoreductionordeletionof steering. thetransmissiontunnelandrearaxle • Goodpowertransmissiontothe differential. roadwayduringacceleration,asthe • Weightandcostreductions,dueto drivenaxleisloaded(primarilywhen deletionofpropellershaftandrearaxle drivingoffoninclines).