车辆工程专业毕业论文外文翻译2

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1、TRANSMISSIONOfalltransmissiontechnologies,themanualgearboxisthemostefficient;around96percentoftheenergythatisputincomesoutoftheotherend.Butnoteveryonecandriveoneorwantsto.Becauseyouhavetodiptheclutchpedal,itislesscomfortabletodriveinheavytraffic.Itmakesthedrivertiredandthetorqueinterruptions’head-n

2、odeffectonpassengerscanbewearing.Thedriver'sclutchcontrolandcorrespondingtorqueinterruptionsarealsothemanualsweakpoint.Whenacceleratingupthroughthegearbox,eachup-shiftrequiresthedrivertocutthetorquemomentarilybyliftingthegaspedalanddippingtheclutch.Itmayjusttakeasecondtocompletetheoperation,butduri

3、ngthistimethevehicleislosingspeedandacceleration.Attheoppositeendofthespectrumisthetraditionalautomatic.Themoderntransmissionisbyfar,themostcomplicatedmechanicalcomponentintoday’sautomobile.Itisatypeoftransmissionthatshiftsitself.Afluidcouplingortorqueconverterisusedinsteadofamanuallyoperatedclutch

4、toconnectthetransmissiontotheengine.Therearetwobasictypesofautomatictransmissionsbasedonwhetherthevehicleisrearwheeldrive.Onarearwheeldrivecar,thetransmissionisusuallymountedtothebackoftheengineandislocatedunderthehumpinthecenterofthefloorboardalongsidethegaspedalposition.Adriveshaftconnectstherear

5、ofthetransmissiontothefinaldrivewhichislocatedintherearaxleandisusedtosendpowertotherearwheel.Powerflowonthissystemissimpleandstraightforwardgoingfromtheengine,throughthetorqueconverter,thenthroughthetransmissionanddrivershaftuntilitreachesthefinaldriverwhereitissplitandsenttothetworearwheel.Onafro

6、ntwheeldrivecar,thetransmissionisusuallycombined.Withthefinaldrivetofromwhatiscalledatransaxle.Theengineonafrontwheeldrivercarisusuallymountedsidewaysinthecarwiththetransaxletuckedunderiton11thesideoftheenginefacingtherearofthecar.Frontaxlesareconnecteddirectlytothetransaxleandprovidepowertothefron

7、twheels.Inthisexample,powerflowsfromtheenginethroughthetorqueconvertertoalargechainthatsendsthepowerthrougha180degreeturntothetransmissionthatisalongsidetheengine.Fromthere，Thepowerisroutedthroughthetransmi