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ID:10920827
大小:64.00 KB
页数:11页
时间:2018-07-08
《车辆工程专业毕业论文外文翻译2》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
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
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