奥迪全系自学手册（SSP）：ssp190_gb.pdf

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1、Service.190AdjustableTurbochargerDesignandFunctionSelf-StudyProgrammeServiceDepartmentIfthewaterlevelinthemillstreamdrops,theTothemiller,thestreamisasimportantasthecurrentwillnolongerbesufficienttoturntheexhaustgasenergyistotheturbocharger.waterwheel.Ifthemillerstillwantstogrin

2、dcorn,thenheByusingadjustablevanes,theresponseofthehastonarrowthestreamofwater.adjustableturbochargeratlowenginespeedsisquick.SSP190/012PageFundamentalprinciples04Designandfunction06Mechanics11Functionchart16Systemoverview18Enginecontrolunit19Sensors20Actuators24Self-diagnosis

3、26Functionaldiagram29Important!/Note!New!TheSelfStudyProgrammeisnotaWorkshopManual!PleaserefertotheServiceLiteraturewhichcontainsalltherelevantinspection,adjustmentandrepairinstructions.3FundamentalprinciplesThebasicprincipleofanexhaustgasturbochargerAnexhaustgasturbochargeris

4、usedtoTheexhaustgasofanenginecontainsbothachievehightorques,andthushigherenginethermalandkineticenergy.Theseenergiesareoutputs.utilisedtodrivetheexhaustgasturbineoftheThiseffectisachievedbycompressingtheturbocharger.intakeair.ThehigherintakeairdensityallowsTheexhaustgaslosesso

5、meofitsenergyandalargervolumeofair,andthereforemorecoolsdownasaresult.oxygen,toenterthecombustionchamberduringeachintakecycle.ThelargeroxygenTheexhaustgasturbinedrivesthecompressorsupplybooststheefficiencyofthecombustionwhichinturncompressestheintakeair,process.heatingitupandth

6、usreducingitsdensity.Theintakeairiscooleddownagainintheairintercooler,therebyincreasingitsdensity.AirintercoolerHeatTheexhaustgasfromtheenginedrivestheexhaustgasturbine.Thecompressedandheatedairisfedintotheairintercooler.AirinletExhaustpipeSSP190/02CompressorExhaustgasturbineT

7、hecompressorcompressesTheexhaustgasturbinedrivestheintakeair.thecompressor.4Theexhaustgasturbochargerfittedwithaby-passAturbochargerhastwosetsofproblems:ItwasdecidedtomakeacompromiselTheturbinespeedatthetopendoftheregardingthedesignoftheexhaustgasturbo-speedrangeishighandtheair

8、iscom-chargerfittedwithaby-pass.pressedmorethanisnecessary.Att