毕业设计外文翻译原文

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1、外文资料CLUTCHTheengineproducesthepowertodrivethevehicle.Thedrivelineordrivetraintransfersthepoweroftheenginetothewheels.Thedrivetrainconsistsofthepartsfromthebackoftheflywheeltothewheels.Thesepartsincludetheclutch,thetransmission,thedriveshaft,andthefin

2、aldriveassembly(Figure8-1).Theclutchwhichincludestheflywheel,clutchdisc,pressureplate,springs,pressureplatecoverandthelinkagenecessarytooperatetheclutchisarotatingmechanismbetweentheengineandthetransmission(Figure8-2).Itoperatesthroughfrictionwhichco

3、mesfromcontactbetweentheparts.Thatisthereasonwhytheclutchiscalledafrictionmechanism.Afterengagement,theclutchmustcontinuetotransmitalltheenginetorquetothetransmissiondependingonthefrictionwithoutslippage.Theclutchisalsousedtodisengagetheenginefromthe

4、drivetrainwheneverthegearsinthetransmissionarebeingshiftedfromonegearratiotoanother.Tostarttheengineorshiftthegears,thedriverhastodepresstheclutchpedalwiththepurposeofdisengagementthetransmissionfromtheengine.Atthattime,thedrivenmembersconnectedtoth

5、etransmissioninputshaftareeitherstationaryorrotatingataspeedthatisslowerorfasterthanthedrivingmembersconnectedtotheenginecrankshaft.Thereisnospringpressureontheclutchassemblyparts.Sothereisnofrictionbetweenthedrivingmembersanddrivenmembers.Asthedrive

6、rletsloosetheclutchpedal,springpressureincreasesontheclutchparts.Frictionbetweenthepartsalsoincreases.Thepressureexertedbythespringsonthedrivenmembersiscontrolledbythedriverthroughtheclutchpedalandlinkage.Thepositiveengagementofthedrivinganddrivenmem

7、bersismadepossiblebythefrictionbetweenthesurfacesofthemembers.Whenfullspringpressureisapplied,thespeedofthedrivinganddriven7外文资料membersshouldbethesame.Atthemoment,theclutchmustactasasolidcouplingdeviceandtransmitallenginepowertothetransmission,witho

8、utslipping.However,thetransmissionshouldbeengagedtotheenginegraduallyinordertooperatethecarsmoothlyandminimizetorsionalshockonthedrivetrainbecauseanengineatidlejustdevelopslittlepower.Otherwise,thedrivingmembersareconnectedwiththedrivenmemberstooquic