自动变速器-毕业论文外文翻译

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1、AUTOMATICTRANSMISSIONThemodernautomatictransmissionisbyfar，themostcomplicatedmechanicalcomponentintoday’sautomobile.Itisatypeoftransmissionthatsiftsitself.Afluidcouplingortorqueconverterisusedinsteadofamanuallyoperatedclutchtoconnectthetransmissiontotheengine.Therearetwo

2、basictypesofautomatictransmissionbasedonwhetherthevehicleisrearwheeldriveorfrontwheeldrive.Onarearwheeldrivecar，thetransmissionisusuallymountedtothebackoftheengineandislocatedunderthehumpinthecenterofthefloorboardalongsidethegaspedalposition.Adriveshaftconnectsthetransmi

3、ssiontothefinaldrivewhichislocatedintherearaxleandisusedtosendpowertotherearwheels.Powerflowonthissystemissimpleandstraightforwardgoingfromtheengine，throughthetorqueconverter，thentroughthetransmissionanddriveshaftuntilitreachesthefinaldrivewhereitissplitandsenttothetwore

4、artransmission.Onafrontwheeldrivecar，thetransmissionisusuallycombinedwiththefinaldrivetoformwhatiscalledatransaxle.Theengineonafrontwheeldrivecarisusuallymountedsidewaysinthecarwiththetransaxletuckedunderitonthesideoftheenginefacingtherearofthecar.Frontaxlesareconnectedd

5、irectlytothetransaxleandprovidepowertofrontwheels.Inthisexample，powerfloesfromtheengine，throughthetorqueconvertertoalargerchainthatsendsthepowerthrougha180degreeturntothetransmissionthatisalongsidetheengine.Fromthere，thepowerisroutedthroughthetransmissiontothefinaldrivew

6、hereitissplitandsenttothetwofrontwheelsthroughthedriveaxles.Thereareanumberofotherarrangementsincludingfrontdrivevehicleswheretheengineismountedfronttobackinsteadofsidewaysandthereareothersystemsthatdriveallfourwheelsbutthetwosystemsdescribedherearebyfarthemostpopular.Am

7、uchlesspopularrearandisconnectedbyadriveshafttothetorqueconverterwhichisstillmountedontheengine.ThissystemisfoundonthenewCorvetteandisusedinordertobalancetheweightevenlybetweenthefrontandrearwheelsforimprovedperformanceandhandling.Anotherreardrivesystemmountseverything，t

8、heengine，transmissionandfinaldriveintherear.ThisrearenginearrangementispopularonthePorsche。Themodernaut