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自动变速器换档规律的研究外文文献翻译、汽车车辆类外文翻译、中英文翻.pdf

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附录 theresearchofamtshiftingschedules VehicularAutomaticTransmissioncanbedividedintothreetypes:AutomaticTransmission(AT), AutomatedMechanicalTransmission(AMT)andContinuouslyVariableTransmission(CVT).AMThas becomeakindoftransmissionthatisfullofpotentiality,duetoitshightransferefficiency,lowcostand easinesstomanufacture. TheresearchonAMTshiftingperformanceiskeytechnologyinthedeveloping.Shifting performancedirectlyinfluencethemarketcompetitionandindustrializationofAMT. AMThasgoodmarketexpectation,butduringtheshiftingprocedure,thepowermustbecutoff whichcausesthepoorshiftingperformancethanATandCVT.Onlythroughimprovingtheshifting performancecanthecommercialcompetencebeestablished.Sothevirtualimportantthingistofindthe waytoimproveshiftingperformance. ThedevelopmentofAMTcanbedividedintothreephases:semi-automatic,automaticand intelligent.ThetwomajorpartofAMTare:thehardwareincludingthemasteredobject,executor,sensors andTCU;andthesoftwareperformingthecontrolstrategy. TheperformanceofATshiftinfluencesgreatlytheperformanceofthevehicle.Sotheresearchonat shiftqualityisanimportantprobleminthedomainofATresearching.ShiftqualitycontrolofATis accomplishedbyelectronicandhydraulicsystem.Toshiftsmoothly,accordingtherealtimethrottle valveopeningandvehiclespeedsignal,thecontrollersendselectronicsignalstocontroloilpressure changingcurveoftheapplyingelements.thispaperanalyzesandresearchdetailedshiftqualitycontrol system，theanalyzingmodelofshiftingprocessandpressurechangingcurveoftheapplyingelements Firstlythispapersummarizestheexistingevaluatedquotaofshiftquality,andfullyanalyzesand introducestheexistingcontrolmannerofATshiftquality. Tomeettheneedsofresearchofvehiclestartingandtherealtimecontrolofshift,thispaperputs forwardasimplifiedmodelofengine-torqueandadynamicsmodelofATshiftingprocess.Throughthe applyingoftheestablishedmodel,thispaperfullyanalyzestheprocessoftheATshifting. Thispaperdraftstheproperoilpressurechangingcurveoftheapplyingelementswhichcan improvetheATshiftquality,andgivesthema