车辆工程专业自动变速器如何工作毕业论文外文文献翻译及原文

《车辆工程专业自动变速器如何工作毕业论文外文文献翻译及原文》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、毕业设计（论文）外文文献翻译文献文献文献文献资料中文题目:自动变速器如何工作资料英文题目：HowAutomaticTransmissionsWork资料来源：院（部）：专业：车辆工程专业班级：姓名：学号：资料发表（出版）日期:指导教师:翻译日期:2017.02.14HowAutomaticTransmissionsWorkIfyouhaveeverdrivenacarwithanautomatictransmission,thenyouknowthattherearetwobigdifferencesbetw

2、eenanautomatictransmissionandamanualtransmission:Thereisnoclutchpedalinanautomatictransmissioncar.Thereisnogearshiftinanautomatictransmissioncar.Onceyouputthetransmissionintodrive,everythingelseisautomatic.Boththeautomatictransmission(plusitstorqueconverter

3、)andamanualtransmission(withitsclutch)accomplishexactlythesamething，buttheydoitintotallydifferentways.Itturnsoutthatthewayanautomatictransmissiondoesitisabsolutelyamazing!Inthisarticle,wellworkourwaythroughanautomatictransmission.We’llstartwiththekeytothewh

4、olesystem:planetarygearsets.Thenwe’llseehowthetransmissionisputtogether，learnhowthecontrolsworkanddiscusssomeoftheintricaciesinvolvedincontrollingatransmission.SomeBasicsJustlikethatofamanualtransmission,theautomatictransmission'sprimaryjobistoallowtheengin

5、etooperateinitsnarrowrangeofspeedswhileprovidingawiderangeofoutputspeeds.Withoutatransmission，carswouldbelimitedtoonegearratio,andthatratiowouldhavetobeselectedtoallowthecartotravelatthedesiredtopspeed.Ifyouwantedatopspeedof80mph，thenthegearratiowouldbesimi

6、lartothirdgearinmostmanualtransmissioncars.You’veprobablynevertrieddrivingamanualtransmissioncarusingonlythirdgear.Ifyoudid，you’dquicklyfindoutthatyouhadalmostnoaccelerationwhenstartingout,andathighspeeds，theenginewouldbescreamingalongnearthered-line.Acarli

7、kethiswouldwearoutveryquicklyandwouldbenearlyundriveable.Sothetransmissionusesgearstomakemoreeffectiveuseoftheengine’storque，andtokeeptheengineoperatingatanappropriatespeed.Thekeydifferencebetweenamanualandanautomatictransmissionisthatthemanualtransmissionl

8、ocksandunlocksdifferentsetsofgearstotheoutputshafttoachievethevariousgearratios，whileinanautomatictransmission,thesamesetofgearsproducesallofthedifferentgearratios.Theplanetarygearsetisthedevicethatmak