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ID:5928325
大小:1.31 MB
页数:24页
时间:2017-12-28
《外文翻译=自动变速器的工作原理=4000字符=械专业外文翻译》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、2008届机械设计制造及其自动化专业外文翻译HowAutomaticTransmissionsWorkbyKarimNiceIntroductiontoHowAutomaticTransmissionsWorkIfyouhaveeverdrivenacarwithanautomatictransmission,thenyouknowthattherearetwobigdifferencesbetweenanautomatictransmissionandamanualtransmission:Thereisnoclutchpedalinanautomatictransmissioncar
2、.Thereisnogearshiftinanautomatictransmissioncar.Onceyouputthetransmissionintodrive,everythingelseisautomatic.Boththeautomatictransmission(plusitstorqueconverter)andamanualtransmission(withitsclutch)accomplishexactlythesamething,buttheydoitintotallydifferentways.Itturnsoutthatthewayanautomatictran
3、smissiondoesitisabsolutelyamazing!AutomaticTransmissionImageGallery242008届机械设计制造及其自动化专业外文翻译Inthisarticle,we'llworkourwaythroughanautomatictransmission.We'llstartwiththekeytothewholesystem:planetarygearsets.Thenwe'llseehowthetransmissionisputtogether,learnhowthecontrolsworkanddiscusssomeoftheintri
4、caciesinvolvedincontrollingatransmission.Justlikethatofamanualtransmission,theautomatictransmission'sprimaryjobistoallowtheenginetooperateinitsnarrowrangeofspeedswhileprovidingawiderangeofoutputspeeds.PhotocourtesyDaimlerChryslerMercedes-BenzCLK,automatictransmission,cut-awaymodelWithoutatransmis
5、sion,carswouldbelimitedtoonegearratio,andthatratiowouldhavetobeselectedtoallowthecartotravelatthedesiredtopspeed.Ifyouwantedatopspeedof80mph,thenthegearratiowouldbesimilartothirdgearinmostmanualtransmissioncars.You'veprobablynevertrieddrivingamanualtransmissioncarusingonlythirdgear.Ifyoudid,you'd
6、quicklyfindoutthatyouhadalmostnoaccelerationwhenstartingout,andathighspeeds,theenginewouldbescreamingalongnearthered-line.Acarlikethiswouldwearoutveryquicklyandwouldbenearlyundriveable.Sothetransmissionusesgearstomakemoreeffectiveuseoftheengine'storque,andtokeeptheengineoperatingatanappropriatesp
7、eed.242008届机械设计制造及其自动化专业外文翻译Thekeydifferencebetweenamanualandanautomatictransmissionisthatthemanualtransmissionlocksandunlocksdifferentsetsofgearstotheoutputshafttoachievethevariousgearratios,whileinanautomatictransmis
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