自动变速器中英文对照外文翻译文献.docx
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自动变速器中英文对照外文翻译文献.docx
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自动变速器中英文对照外文翻译文献
中英文翻译
外文翻译
theresearchsof
amtshiftingschedules
VehicularAutomaticTransmissioncanbedividedintothreetypes:
AutomaticTransmission(AT),AutomatedMechanicalTransmission(AMT)andContinuouslyVariableTransmission(CVT).AMThasbecomeakindoftransmissionthatisfullofpotentiality,duetoitshightransferefficiency,lowcostandeasinesstomanufacture.
TheresearchonAMTshiftingperformanceiskeytechnologyinthedeveloping.ShiftingperformancedirectlyinfluencethemarketcompetitionandindustrializationofAMT.
AMThasgoodmarketexpectation,butduringtheshiftingprocedure,thepowermustbecutoffwhichcausesthepoorshiftingperformancethanATandCVT.Onlythroughimprovingtheshiftingperformancecanthecommercialcompetencebeestablished.Sothevirtualimportantthingistofindthewaytoimproveshiftingperformance.
ThedevelopmentofAMTcanbedividedintothreephases:
semi-automatic,automaticandintelligent.ThetwomajorpartofAMTare:
thehardwareincludingthemasteredobject,executor,sensorsandTCU;andthesoftwareperformingthecontrolstrategy.
TheperformanceofATshiftinfluencesgreatlytheperformanceofthevehicle.SotheresearchonatshiftqualityisanimportantprobleminthedomainofATresearching.ShiftqualitycontrolofATisaccomplishedbyelectronicandhydraulicsystem.Toshiftsmoothly,accordingtherealtimethrottlevalveopeningandvehiclespeedsignal,thecontrollersendselectronicsignalstocontroloilpressurechangingcurveoftheapplyingelements.thispaperanalyzesandresearchdetailedshiftqualitycontrolsystem,theanalyzingmodelofshiftingprocessandpressurechangingcurveoftheapplyingelements
Firstlythispapersummarizestheexistingevaluatedquotaofshiftquality,andfullyanalyzesandintroducestheexistingcontrolmannerofATshiftquality.
Tomeettheneedsofresearchofvehiclestartingandtherealtimecontrolofshift,thispaperputsforwardasimplifiedmodelofengine-torqueandadynamicsmodelofATshiftingprocess.Throughtheapplyingoftheestablishedmodel,thispaperfullyanalyzestheprocessoftheATshifting.
ThispaperdraftstheproperoilpressurechangingcurveoftheapplyingelementswhichcanimprovetheATshiftquality,andgivesthematerialcalculatedmethodsoftheAG4AT.ThispapersimulatestheAG4AT’sshiftingprocessof2Hto3H.Theresultsofthesimulationvalidatetheestablishedsimplifiedmodelsandtheexpectedoilpressurechangingcurve.
ThispaperfullyanalyzesthemechanismofthepressureregulatingandflowcontrollingsystemoftheAG4AT,andpreparatorydiscussesthedesignoftheblock-diagramoftheshiftqualitycontrol.ThispapertestthecontrolsystemandhydraulicsystemoftheAG4ATbytheAThydraulic-electronictesting-bed.Theresultofthetestvalidatesthecorrectionoftheseanalyses.
AutomatedMechanicalTransmission,assocalledAMT,isanew-styletransmissionsystem.AMTtechnologyappliestheautomatictechnologytothemanualmechanicaltransmissionandmakestheselection-gear,shift,clutchandthrottleimplementautomatically.AMTtechnologyissuitableforthesituationofourcountry,andhasanexpansivemarketanddevelopmentforeground.ShiftschedulesdecidethetimetoshiftandarethesouloftheAMT.WhentheAMTisworking,bycomparingthestatesofthevehiclewiththeoptimalshiftschedules,theAMTdecidestheoptimalshifttimeandachievestheshiftautomatically.Thiswilllessenthetirednessofthedriverandimprovethesafety.Atthesametime,thepowerandfuel-economyofthevehiclecanalsobeimproved.TheauthorchoosestheshiftscheduleasthekeytechnologyproblemtoberesearchedandthemainstudyaimofthisthesisistogettheoptimalshiftschedulesfortheAMTandsoimprovethepowerandfuel-economyofthevehicle.Throughanalyzingtheinfluencefactorsofpowerandfuel-economyfortheautomobile,theauthorgettheestablishmentmethodsfortheoptimal-powershiftscheduleandoptimalfuel-economyshiftschedule.Inordertosolvetheinfluenceofmassontheshiftschedule,theauthorpresentsavariable-structure-controlledshiftsystem.Thisenrichesthetheoryofshiftschedules.Becausethecomputersimulationcansavealotofmanpowerandmaterialresourcescomparingwiththetrue-cartest,sointhisthesis,theauthorusesthesimulationtoolboxMatlab/Simulatetosetupthesimulationmodelforshiftschedules.Usingthismodel,theoptimal-powershiftscheduleandoptimalfuel-economyshiftscheduleabovearesimulatedandprovedtobereasonable.
Shiftingperformanceisdefinedastheextentofswiftnessandsoftnessduringtheprocedureofnon-powershiftingandtoextendthelifeofthepowertrain.Theindexiscomfortofpassenger,timedurationandshock,ninefactorsmaybeinfluencetheshiftingperformance,andtwoexperimentalmethodscanbeusedtoinvestigatethenatureofthisperformance:
oneiscollectingreal-timedataduringroadexperimentandanalyzingthem,theotheristhesimulationoftheoperationconditionsofthevehicle.
ThecoreoftheAMTsystemisthecontrolstrategy,theprincipleoftheclutchengagement,shiftingprocedure,thechoiceofcontrolmethodandtheCANcommunicationbetweenTCUandECUcaninfluencetheshiftingperformance.
Shiftingscheduleisthescheduleofautoshiftingtimebetweentwoshiftswithcontrollingparameters.Itincludeseconomicalanddynamicalshiftingschedule.Atpresent,shiftingscheduleoftwocontrollingparameters(vehiclespeedandopeningonthrottle)ismainlyused.Ifshiftingscheduleisnotgood,shiftingwillnothappenatrighttimeandtheworkingconditionofenginewillbesevere.Itwillmakethesoundofengineabnormallyandstabilitybadlythroughthewholeshiftingprocession.SometimesevenflameoutScheduleofclutchengagementisdeterminedbyreleasingjourneyofclutch,openingofthrottle,shifting,vehiclespeedandloading.Themain
Controllinggoalsareengagingquantityandengagingspeed.Theengagingcontrolofclutchismainlyreferredtothecontrolofengagingspeed.Itisdividedintothreestages:
fast,slow,fast.Shiftingqualityisdirectlyinfluencedbythesecondstage.Ifengagingharder,itwillmakeshiftingconcussion,evenflameout;ifengagingmoreslowly,itwillmakethefrictiontimelongerandreduceitslongevity.Themaincontrollingparametersaredifferencebetweeninitiativeandpassiveandtorquesonbothsides.Whentorquesbeingapproximatelyequal,itisprovedbyexperimentsthatitcanguaranteeshiftingtimeandnotmakeconcussionthroughtheprocessionofengagementatthetimeofdifferenceofrotatingspeedbelowsomevalue.Meanwhile,theabrasionofclutchisnotsevere.
Shiftingprocedureistheprocedurethroughworkingharmoniouslyamongengine,clutchandtransmission.Theircooperationwillaffectshiftingtimeheavily.Inordertodecreasetheshiftingtime,thetimethatisspentonthefrictionoftheclutchshouldbedecreasedfirst.Ifweintendtoincreasethetimeofnon-loadstage,whichhelpstominimizethedifferenceoftherotaryspeedbetweenthedrivingdiscandthedrivendisc.Ifweintendtoshortenthetimeofthenon-loadstage,engagetheclutchimmediatelyafterthegearchange.Theclutchcanengageinasatisfyingperiodifthenewmethodofcontrollingtheengagingspeedoftheclutchisrealizable.Andthetimethatisspentonsynchronizingthegearsshouldalsobeshortened.Itcanberealizedinthefollowingtwoways.Thefirstistodecreasethedifferenceofthedrivinggearandthedrivengear.Thesecondistoincreasetheshiftingforce.IfrealizingtheunioncontrolbetweenECUandTCUbyCANbus,AMThasthebestcontrolandthebestshiftingperformancebyuseofcommunicationstrategybetweenTCUandECU.
Influenceonshiftingperformancebyhardware
TheelementsinhardwaresystemarethebasisofproperfunctionsofAMT.Executors,sensors,electroniccomponents,hydraulicsystemshaveinfluencesonshiftingperformance,thechoiceofhardwareparametersisofvitalimportanttoimprovementofshiftingperformance.
Withthedevelopmentofthetheoryandtechnologyofvehicle,thetechnicalincreasinglymatureofmicroprocessorandtheextensiveapplicationofelectronictechniqueonthecar,peoplehavenolimitatsatisfyingtheautomotivemeansoftransportationonly,facinggraduallyfromtherequestofthecarpower,economyandeasilymanipulating,flexibility,safety,andtheintelligenttypeofcarbecomesthefocusinthevisionofpeopleincreasingly.Company’spublicitysloganof"person,car,life","makepeoplethecenter"etc.Onthesideexhibittheexpectationofpeopletotheautomotiveindividuation,humanity.
Inthedevelopmentdirectionofthecarintelligence,theintelligenceoftheautomaticgearboxhasimportanteffect.Buttheintelligenceoftheautomaticgearboxembodiesattheestablishmentoftheshiftregulation.Forthefashion,forsatisfyingpeopletothenewautomotiverequest,forcompetitiveadvantageofthecartype,atpresent,eachbigfactoryinworldworkedverymuchinshiftregulationofnewcartype.Amongthose,themostarrestingisAL4automaticgearboxdevelopedbyPEUGEOT/CITROENandRENAULTinthatthereunexpectedlyarethe10kindsofsomanyshiftregulations.Inthebigsystemofperson—car—road,thegoodandbadofthecarcontrol,reflectprimarilyinthecoordinationofthevehicleandenvironment(road),thecoordinationofthevehicleandperson.Andso,theelectronicautomaticcontrolsystemcansavevariousregulationstoprovidethedrivertochoosetouse,notonlyhavingtheeconomicregulation,motive(calltosportthetypeagain)regulation,but
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