汽车专业英语发动机市公开课一等奖省名师优质课赛课一等奖课件

Unit2-1

MainComponentsofEngine

2一、发动机分类Clissifiedbyfuel（按燃料不一样分类）···汽油机和柴油机；Clissfiledbyworkingprogress（按工作行程分类）···四冲程发动机和二冲程发动机；Clissfiledbycooledways（按冷却方式分类）···水冷发动机和风冷发动机；Clissfiledbynumberofcylinder（按气缸数量分类）···单缸发动机和多缸发动机3Clissifiedbyfuel（按燃料不一样分类）汽油发动机gasolineenginegasoline['gæsəliːn]

n.汽油点燃方式（点燃式）4柴油发动机dieselenginediesel[‘di:zəl]

n.柴油，柴油机点燃方式（压燃式）5Clissfiledbyworkingprogress

（按工作行程分类）二冲程发动机Two

strokeenginestroke[strəʊk]

n.冲程，行程；活塞重复运动一次，曲轴转动一周，两个冲程完成一个工作循环。6四冲程发动机Fourstrokeenginestroke[strəʊk]

n.冲程，行程；活塞重复运动两次，曲轴转动两周，四个冲程完成一个工作循环。7水冷却式发动机Watercoolestengine水箱，经过水泵作用，水经过水道流通整个汽缸体，进行降温。8风冷却式发动机aircoolestengine风冷，经过空气气流与风扇作用，空气/风经过发动机整个汽缸体，进行降温。9Clissfiledbynumberofcylinder（按气缸数量分类）单缸发动机Singlecylinderenginecylinder['sɪlɪndə]

n.气缸我只有一个气缸，一组气门；10多缸发动机Multicylinderenginecylinder['sɪlɪndə]

n.气缸我有多个气缸，多组气门；11二、发动机基本组成12汽油机包含几大系统？冷却系coolingsystem润滑系lubricationsystem

[ˌlu:brɪ'keɪʃn]润滑，加油;油润;起动系startingsystem点火系Ignitionsystem

[ɪgˈnɪʃn]燃油供给系fuelsupplysystem进气系统intakesystem排气系统exhaustsystem[ɪgˈzɔ:st]1314Coolingsystem(冷却系统)Startingsystem

(起动系统)15Lubricationsystem

(润滑系统)Ignitionsystem

(点火系统)16Fuelsupplysystem

(燃油供给系统)intakesystem

(进气系统)17例句分析：Enginesystemincludes：____________、_______________、________________、_______________.

汉字：includevt.包含，包含；译文：发动机系统包含：____________、

____________、_____________、

____________。

ignitionsystemstartingsystemlubricationsystemcoolingsystem点火系统起动系统润滑系统冷却系统18汽油机包含哪两大机构？Crank-connectingrodmechanism曲柄连杆机构19配气机构Valvemechanism气门机构20Intake进气

Compression压缩Exhaust排放Power做功Stroke./strəuk/n.打击；中风；笔画；冲程；尝试；轻抚三、发动机四大工作行程21四、发动机布置形式发动机前置前轮驱动发动机前置后轮驱动发动机后置后轮驱动22课堂小结需要记住单词：发动机底盘车身电器系统汽油柴油冲程EngineChassisBodyElectricalsystemGasolineDieselstroke23单独，独立气缸曲柄连杆机构配气机构SinglecylinderCrank-connectingrodmechanism[kræŋk]

n.

[机]曲柄;

妙语，奇想[rɒd]

n.

杆，拉杆;

处罚，体罚;

（责打人用）棍棒;

手枪;

[ˈmekənɪzəm]

机制

Valvemechanism英[vælv]美[vælv]n阀;真空管;（管乐器）活栓;（心脏）瓣膜;排气系统Exhaustsystem润滑系统Lubricationsystem

点火系统Ignitionsystem开启系统

Startingsystem冷却系统Coolingsystem进气系统Intakesystem2425需要记住句子Therearefourbasiccomponentsoftheautomobile:engine,chassis,bodyandelectricalsystem.译：汽车有四个基本组成部分，发动机，底盘，车身和电气系统。Enginesystemincludes：ignitionsystem，lubricationsystem,coolingsystem,startingsystem.译：发动机系统包含：点火系，润滑系，冷却系，起动系。26布置任务将需要记住单词和句子统计在笔记本上；将需要记住单词每个写3遍，1遍汉语意思；Pre-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.译文：内燃机，顾名思义，就是燃料在气缸内部燃烧，而且把燃烧时膨胀力转化为驱动车辆旋转力。II.TextExplanationOfallautomobilecomponents,plicated[kmplikeitid]adj.复杂,难解dominance[dmnns]n.优势,统治译文：汽车发动机是一切汽车部件中结构最复杂，对汽车功效起支配作用一个总成。II.TextExplanationItsfunctionistoconvertheatenergyintomechanicalenergyusedtodrivethevehicles.Convert……into…..

转变；变换译文：它作用就是将热能转换成机械能用来驱动汽车。II.TextExplanationConvert…..into….①转变；变换Thatbuildinghasbeenconvertedintoaschool.那座楼房改成学校了。②兑换IwanttoconvertsomeHongKongdollarsintoAmericandollars.我想把一些港元换成美元。③改变信仰、党派或意见等Shemanagedtoconverthimtoheropinion.她终于设法说服了他接收她意见。II.TextExplanationPowerisproducedbythelinearmotionofapistoninacylinder.

linear[

lini]adj.线,直线,线性

piston[pistn]

n.活塞II.TextExplanationThepistonattachedtothetopofaconnectingrodbyapin,calledapistonpinorwristpin.

attachtov.连接connectingrod连杆

pistonpin=wristpin活塞销

II.TextExplanationTheconnectingrodtransmitstheup-and-downmotionofthepistontothecrankshaft,whichchangesitintorotarymotion.transmit…to…

把…传到…whichchangesitintorotarymotion

定语从句II.TextExplanationdieselengineswaterpumptheignitiondistributoroilpantiminggearcrankshaftandconnectingrodmechanismvalvegearfuelsystemexhaustpipeexhaustmanifoldIII.ExercisesTranslatethefollowingexpressionsintoChinese.柴油发动机水泵分电器油底壳正时齿轮曲柄连杆机构配气机构燃油系统排气管排气歧管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.发动机是汽车动力源.它经过汽缸内活塞线性运动产生.2．Thefuelsystemworksaccordingtotherequirementsoftheengineasitprovidesanair-fuelmixturewhichmustbeinproportiontothespeedandloadplacedontheengine.燃油系统作用是依据发动机转速和负荷提供一定百分比可燃混合气以