汽車專業(yè)英語 Main Components of Engine市公開課一等獎省名師優(yōu)質(zhì)課賽課一等獎?wù)n件

Unit2-1

MainComponentsofEngine

ContentsⅠ．Pre-questionsII.Text

ExplanationIII.ExercisesPre-questionsTheheartofautomobileWhatimpressionoftheengine?complicatedpowerPre-questionsWhataretheretypesoftheengine?electricmotors,steamengines,andinternalcombustionenginesWhat’stheinternalcombustionengine?

burnsfuelwithinthecylindersandconvertstheexpandingforceofthecombustionintorotaryforceusedtopropelthevehicle.Pre-questionsSingle-cylinderenginecylinderpistonPistonpinConnectingrodcrankshaftOilpipeIntakevalveExhaustvalveTiminggearOilpumpwhatisthepowersourceofautomobileandhowtoproduce?pistonpistonpinconnectingrodcrankshaftEnginePowerisproducedbythelinearmotionofapistoninacylinder.

Theconnectingrodtransmitstheup-and-downmotionofthepistontothecrankshaft,whichchangesitintorotarymotion.

Pre-questionsTheenginecomprisestwomechanismandfivesystems,whatarethey?crankshaftandconnectingrodmechanism,valvegear,coolingsystem,lubricatingsystem,fuelsystem,startingsystem,ignitionsystemPre-questionsconnectingrodflywheelcrankshaftpistonintakevalveexhaustvalvepushrodtappettiminggears■

Valvegear

■

Connectingrod

EnginecoolingsystemEnginelubricatingsystemFuelsupplysystemValvegearWhat’sthefunctionofthecrankshaftandconnectingrodmechanism?

Itsfunctionistoconvertheatenergyintomechanicalenergyusedtodrivethevehicles.

Pre-questionsTheinternalcombustionengine,asitsnameindicates,burnsfuelwithinthecylindersandconvertstheexpandingforceofthecombustionintorotaryforceusedtopropelthevehicle.譯文：內(nèi)燃機，顧名思義，就是燃料在氣缸內(nèi)部燃燒，而且把燃燒時膨脹力轉(zhuǎn)化為驅(qū)動車輛旋轉(zhuǎn)力。II.TextExplanationOfallautomobilecomponents,plicated[kmplikeitid]adj.復(fù)雜,難解dominance[dmnns]n.優(yōu)勢,統(tǒng)治譯文：汽車發(fā)動機是一切汽車部件中結(jié)構(gòu)最復(fù)雜，對汽車功效起支配作用一個總成。II.TextExplanationItsfunctionistoconvertheatenergyintomechanicalenergyusedtodrivethevehicles.Convert……into…..

轉(zhuǎn)變；變換譯文：它作用就是將熱能轉(zhuǎn)換成機械能用來驅(qū)動汽車。II.TextExplanationConvert…..into….①轉(zhuǎn)變；變換Thatbuildinghasbeenconvertedintoaschool.那座樓房改成學(xué)校了。②兌換IwanttoconvertsomeHongKongdollarsintoAmericandollars.我想把一些港元換成美元。③改變信仰、黨派或意見等Shemanagedtoconverthimtoheropinion.她終于設(shè)法說服了他接收她意見。II.TextExplanationPowerisproducedbythelinearmotionofapistoninacylinder.

linear[

lini]adj.線,直線,線性piston[pistn]

n.活塞II.TextExplanationThepistonattachedtothetopofaconnectingrodbyapin,calledapistonpinorwristpin.

attachtov.連接connectingrod連桿pistonpin=wristpin活塞銷II.TextExplanationTheconnectingrodtransmitstheup-and-downmotionofthepistontothecrankshaft,whichchangesitintorotarymotion.transmit…to…把…傳到…whichchangesitintorotarymotion定語從句II.TextExplanationdieselengineswaterpumptheignitiondistributoroilpantiminggearcrankshaftandconnectingrodmechanismvalvegearfuelsystemexhaustpipeexhaustmanifoldIII.ExercisesTranslatethefollowingexpressionsintoChinese.柴油發(fā)動機水泵分電器油底殼正時齒輪曲柄連桿機構(gòu)配氣機構(gòu)燃油系統(tǒng)排氣管排氣歧管1-cylinderheadcover2-piston3-timingtoothedbelt4-waterpump5-oilpan6-oilpump7-crankshaft8-flywheel9-distributor10-valveIII.ExercisesThecrankshaftrepresentsthefinallink

intheconversionofreciprocatingmotionatthepistontooneofrotationattheflywheel.Inthecastofthemulti-cylinder

engine,thecrankshafthastocontrol

therelativemotionsofthepistons,whilereceivingtheirownimpulses.Aone-piececonstructionismostcommonly

usedforthemotor-vehiclecrankshaft,whichextendsthewholelengthoftheengineandmustthereforepossessconsiderablerigidity.III.ExercisesThetiming-drivefortheenginevalvemechanismistakenfromthefrontendofthecrankshaft

asisthepulleyandbeltdrivefortheengineauxiliaries,suchasthecoolingfanandthealternatorforelectricalsystem.attachedtotherearendofthecrankshaftistheengineflywheel.III.ExercisesI.TranslatethefollowingsentencesintoChinese.1．Engineisthepowersourceoftheautomobile.Powerisproducedbythelinearmotionofapistoninacylinder.發(fā)動機是汽車動力源.它經(jīng)過汽缸內(nèi)活塞線性運動產(chǎn)生.2．Thefuelsystemworksaccordingtotherequirementsoftheengineasitprovidesanair-fuelmixturewhichmustbeinproportiontothespeedandloadplacedontheengine.燃油系統(tǒng)作用是依據(jù)發(fā)動機轉(zhuǎn)速和負荷提供一定百分比可燃混合氣以滿足發(fā)動機需求。III.Exercises3．Thevalvegearprovidestimelyadmissionofthefreshchargeintothecylindersandexhaustofspentgasesfromthem.配氣機構(gòu)機構(gòu)可定時將新鮮氣體充入氣缸，而且將廢氣排放出去。III.Exercises1．發(fā)動機主要有兩大機構(gòu)五大系統(tǒng)組成。Anengineismainlycomposedoftwomechanismsandfivesystems.2．曲柄連桿機構(gòu)主要包含機體組，活塞連桿組和曲軸飛輪組。Thecrankshaftandconnectingrodmechanism

mainlyconsistsoftheenginecrankcaseandcylinderblock,thepistonandconnectingrod,thecrankshaftandflywheel.

III.ExercisesII.TranslatethefollowingsentencesintoEnglish.3．水泵工作時，能夠?qū)⒗鋮s液在發(fā)動機水套中和散熱器之間往返流動。Whe