自动变速器换挡规律的研究-毕业设计外文翻译

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1、THERESEARCHSOFAMTSHIFTINGSCHEDULESVehicularAutomaticTransmissioncanbedividedintothreetypes:AutomaticTransmission(AT),AutomatedMechanicalTransmission(AMT)andContinuouslyVariableTransmission(CVT).AMThasbecomeakindoftransmissionthatisfullofpotentiality,duetoitshightransferefficiency,low

2、costandeasinesstomanufacture.TheresearchonAMTshiftingperformanceiskeytechnologyinthedeveloping.ShiftingperformancedirectlyinfluencethemarketcompetitionandindustrializationofAMT.AMThasgoodmarketexpectation,butduringtheshiftingprocedure,thepowermustbecutoffwhichcausesthepoorshiftingper

3、formancethanATandCVT.Onlythroughimprovingtheshiftingperformancecanthecommercialcompetencebeestablished.Sothevirtualimportantthingistofindthewaytoimproveshiftingperformance.ThedevelopmentofAMTcanbedividedintothreephases:semi-automatic,automaticandintelligent.ThetwomajorpartofAMTare:th

4、ehardwareincludingthemasteredobject,executor,sensorsandTCU;andthesoftwareperformingthecontrolstrategy.TheperformanceofATshiftinfluencesgreatlytheperformanceofthevehicle.SotheresearchonatshiftqualityisanimportantprobleminthedomainofATresearching.ShiftqualitycontrolofATisaccomplishedby

5、electronicandhydraulicsystem.Toshiftsmoothly,accordingtherealtimethrottlevalveopeningandvehiclespeedsignal,thecontrollersendselectronicsignalstocontroloilpressurechangingcurveoftheapplyingelements.thispaperanalyzesandresearchdetailedshiftqualitycontrolsystem，theanalyzingmodelofshifti

6、ngprocessandpressurechangingcurveoftheapplyingelementsFirstlythispapersummarizestheexistingevaluatedquotaofshiftquality,andfullyanalyzesandintroducestheexistingcontrolmannerofATshiftquality.Tomeettheneedsofresearchofvehiclestartingandtherealtimecontrolofshift,thispaperputsforwardasim

7、plifiedmodelofengine-torqueandadynamicsmodelofATshiftingprocess.Throughtheapplyingoftheestablishedmodel,thispaperfullyanalyzestheprocessoftheATshifting.ThispaperdraftstheproperoilpressurechangingcurveoftheapplyingelementswhichcanimprovetheATshiftquality,andgivesthematerialcalculatedm

8、ethodsoftheA