自动变速器换档规律的研究 毕业论文外文翻译

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1、专业外文及翻译THERESEARCHSOFAMTSHIFTINGSCHEDULESVehicularAutomaticTransmissioncanbedividedintothreetypes:AutomaticTransmission(AT),AutomatedMechanicalTransmission(AMT)andContinuouslyVariableTransmission(CVT).AMThasbecomeakindoftransmissionthatisfullofpotentiality

2、,duetoitshightransferefficiency,lowcostandeasinesstomanufacture.TheresearchonAMTshiftingperformanceiskeytechnologyinthedeveloping.ShiftingperformancedirectlyinfluencethemarketcompetitionandindustrializationofAMT.AMThasgoodmarketexpectation,butduringtheshif

3、tingprocedure,thepowermustbecutoffwhichcausesthepoorshiftingperformancethanATandCVT.Onlythroughimprovingtheshiftingperformancecanthecommercialcompetencebeestablished.Sothevirtualimportantthingistofindthewaytoimproveshiftingperformance.ThedevelopmentofAMTca

4、nbedividedintothreephases:semi-automatic,automaticandintelligent.ThetwomajorpartofAMTare:thehardwareincludingthemasteredobject,executor,sensorsandTCU;andthesoftwareperformingthecontrolstrategy.TheperformanceofATshiftinfluencesgreatlytheperformanceofthevehi

5、cle.SotheresearchonatshiftqualityisanimportantprobleminthedomainofATresearching.ShiftqualitycontrolofATisaccomplishedbyelectronicandhydraulicsystem.Toshiftsmoothly,accordingtherealtimethrottlevalveopeningandvehiclespeedsignal,thecontrollersendselectronicsi

6、gnalstocontroloilpressurechangingcurveoftheapplyingelements.thispaperanalyzesandresearchdetailedshiftqualitycontrolsystem，theanalyzingmodelofshiftingprocessandpressurechangingcurveoftheapplyingelementsFirstlythispapersummarizestheexistingevaluatedquotaofsh

7、iftquality,andfullyanalyzesandintroducestheexistingcontrolmannerofATshiftquality.Tomeettheneedsofresearchofvehiclestartingandtherealtimecontrolofshift,thispaperputsforwardasimplifiedmodelofengine-torqueandadynamicsmodelofATshiftingprocess.Throughtheapplyin

8、goftheestablishedmodel,thispaperfullyanalyzestheprocessoftheATshifting.ThispaperdraftstheproperoilpressurechangingcurveoftheapplyingelementswhichcanimprovetheATshiftquality,andgivesthematerialcalculatedmethod