奥迪全系自学手册（SSP）：luk_tech_dsg_de_en.pdf

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1、DoubleClutchforDirectShiftGearbox7-speedtransmissionbyAudi,Seat,SkodaandVolkswagenTechnologyFailureDiagnosisRemovalandinstallationguidelinesTechnologyContent1Whatisadirectshiftgearbox?PageForseveralyearsthedirectshiftgearbox(DSG)hasbeenusedAndthisishowitworks:involumeproduction

2、attheVolkswagenGroup.Since2003aBoththedryandwetversionshavetwogearsetsandtwo1Whatisadirectshiftgearbox?3numberofsuccessivemodelshavebeenequippedwiththeclutches.Eachoftheclutchesisassignedagearset.Theyare6-speedversionwhichfeaturesawetdoubleclutch.Since2008,operatedalternatelywh

3、enchanginggearsmakingtraction2Designandoperatingprincipleofthedrydoubleclutchsystem4modelswithenginetorqueofupto250Nmhavebeenequippedinterruptionathingofthepast.withthenew7-speedDSGwithdrydoubleclutch(DC).2.1Doubleclutch5The6-speedgearboxusesawetdoubleclutchwhichisimmersedinthe

4、gearboxoil.Thisdesignoffersexcellentcoolingperformanceasthetransmissionoilimmediatelyabsorbsheat.2.1.1Operatingprinciple5Additionally,itrequireslittleinstallationspaceandisabletotransmithigherenginetorque.ThisiswhythewetDSGis2.1.2Design6predominantlyusedwithhigh-torqueengines.B

5、uttherearealsodrawbacks:highdraglossesduetothewetclutch,requirement2.1.3Function7forhigh-capacityhydraulicpumpsandtime-consumingrepairs.2.2Dualmassflywheel8Likeconventionalsingle-discclutchesthedrydoubleclutchofthe7-speedDSGisalsolocatedinthegearboxhousing.There2.3Engagementsys

6、tem9arenodraglossesasitisnotoil-immersedwhichincreasesengineandfuelefficiencycomparedtowetdoubleclutches.It3Troubleshootingdoubleclutchfailure10alsomakesrepairslesscomplex.3.1Generalrepairguidelines10State-of-the-arttransmissionconceptsaredesignedto3.2Weartest11incorporatethead

7、vantagesofautomaticmanualgearboxes.Automatictransmissionsoffersuperbdrivingcomfort3.3Visualinspection11thankstoautomatedgearshiftanduninterruptedtractionwhilemanualtransmissionsaresporty,funandeconomical.3.4Noise11Boththe6-speedand7-speedversionsoftheDSGofferthesebenefits.TheDS

8、Gisanautomatedshiftgearbox3.5Disengagementproblemsandc