2汽车专业英语--发动机

Unit2-1MainComponentsofEngine,2,一、发动机的分类,Clissifiedbyfuel（按燃料不同分类）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,3,Clissifiedbyfuel（按燃料不同分类）,汽油发动机gasolineenginegasolinegslinn.汽油,点燃方式（点燃式）,4,柴油发动机dieselenginedieseldi:zln.柴油，柴油机,点燃方式（压燃式）,5,Clissfiledbyworkingprogress（按工作行程分类）,二冲程发动机Twostrokeenginestrokestrkn.冲程，行程；,活塞反复运动一次，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Fourstrokeenginestrokestrkn.冲程，行程；,活塞反复运动两次，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，通过水泵作用，水通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，通过空气气流与风扇作用，空气/风通过发动机整个汽缸体，进行降温。,9,Clissfiledbynumberofcylinder（按气缸数量分类）,单缸发动机Singlecylinderenginecylinderslndn.气缸,我只有一个气缸，一组气门；,10,多缸发动机Multicylinderenginecylinderslndn.气缸,我有多个气缸，多组气门；,11,二、发动机的基本组成,12,汽油机包含几大系统？,冷却系coolingsystem润滑系lubricationsystemlu:brken润滑，加油;油润;起动系startingsystem点火系Ignitionsystemgnn,燃油供给系fuelsupplysystem进气系统intakesystem排气系统exhaustsystemgz:st,13,14,Coolingsystem(冷却系统),Startingsystem(起动系统),15,Lubricationsystem(润滑系统),Ignitionsystem(点火系统),16,Fuelsupplysystem(燃油供给系统),intakesystem(进气系统),17,例句分析：,Enginesystemincludes：_、_、_、_.中文：includevt.包括，包含；译文：发动机系统包括：_、_、_、_。,ignitionsystem,startingsystem,lubricationsystem,coolingsystem,点火系统,起动系统,润滑系统,冷却系统,18,汽油机包括哪两大机构？,Crank-connectingrodmechanism,曲柄,连杆,机构,19,配气机构,Valvemechanism,气门,机构,20,Intake进气,Compression压缩,Exhaust排放,Power做功,Stroke./struk/n.打击；中风；笔画；冲程；尝试；轻抚,三、发动机的四大工作行程,21,四、发动机的布置形式,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,需要记住的单词：发动机底盘车身电器系统汽油柴油冲程,EngineChassisBodyElectricalsystemGasolineDieselstroke,23,单独的，独立的气缸曲柄连杆机构配气机构,SinglecylinderCrank-connectingrodmechanismkrkn.机曲柄;妙语，奇想rdn.杆，拉杆;惩罚，体罚;（责打人用的）棍棒;手枪;meknzm机制Valvemechanism英vlv美vlvn阀;真空管;（管乐器的）活栓;（心脏的）瓣膜;,排气系统Exhaustsystem润滑系统Lubricationsystem点火系统Ignitionsystem启动系统Startingsystem冷却系统Coolingsystem进气系统Intakesystem,24,25,需要记住的句子,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：发动机系统包括：点火系，润滑系，冷却系，起动系。,26,布置任务,将需要记住的单词和句子记录在笔记本上；将需要记住的单词每个写3遍，1遍汉语意思；,Pre-questions,Theheartofautomobile,Whatimpressionoftheengine?,complicated,power,Pre-questions,Whataretheretypesoftheengine?electricmotors,steamengines,andinternalcombustionenginesWhatstheinternalcombustionengine?burnsfuelwithinthecylindersandconvertstheexpandingforceofthecombustionintorotaryforceusedtopropelthevehicle.,Pre-questions,Single-cylinderengine,cylinder,piston,Pistonpin,Connectingrod,crankshaft,Oilpipe,Intakevalve,Exhaustvalve,Timinggear,Oilpump,whatisthepowersourceofautomobileandhowtoproduce?,piston,pistonpin,connectingrod,crankshaft,EnginePowerisproducedbythelinearmotionofapistoninacylinder.Theconnectingrodtransmitstheup-and-downmotionofthepistontothecrankshaft,whichchangesitintorotarymotion.,Pre-questions,Theenginecomprisestwomechanismandfivesystems,whatarethey?crankshaftandconnectingrodmechanism,valvegear,coolingsystem,lubricatingsystem,fuelsystem,startingsystem,ignitionsystem,Pre-questions,connectingrod,flywheel,crankshaft,piston,intakevalve,exhaustvalve,pushrod,tappet,timinggears,ValvegearConnectingrod,Enginecoolingsystem,Enginelubricatingsystem,Fuelsupplysystem,Valvegear,Whatsthefunctionofthecrankshaftandconnectingrodmechanism?Itsfunctionistoconvertheatenergyintomechanicalenergyusedtodrivethevehicles.,Pre-questions,Theinternalcombustionengine,asitsnameindicates,burnsfuelwithinthecylindersandconvertstheexpandingforceofthecombustionintorotaryforceusedtopropelthevehicle.译文：内燃机，顾名思义，就是燃料在气缸内部燃烧，并且把燃烧时的膨胀力转化为驱动车辆的旋转力。,II.TextExplanation,Ofallautomobilecomponents,plicatedkmplikeitidadj.复杂的,难解的dominancedmnnsn.优势,统治译文：汽车发动机是一切汽车部件中结构最复杂，对汽车功能起支配作用的一个总成。,II.TextExplanation,Itsfunctionistoconvertheatenergyintomechanicalenergyusedtodrivethevehicles.Convertinto.转变；变换译文：它的作用就是将热能转换成机械能用来驱动汽车。,II.TextExplanation,Co.转变；变换Thatbuildinghasbeenconvertedintoaschool.那座楼房改成学校了。兑换IwanttoconvertsomeHongKongdollarsintoAmericandollars.我想把一些港元换成美元。改变信仰、党派或意见等Shemanagedtoconverthimtoheropinion.她终于设法说服了他接受她的意见。,II.TextExplanation,Powerisproducedbythelinearmotionofapistoninacylinder.linearliniadj.线的,直线的,线性的pistonpistnn.活塞,II.TextExplanation,Thepistonattachedtothetopofaconnectingrodbyapin,calledapistonpinorwristpin.attachtov.连接connectingrod连杆pistonpin=wristpin活塞销,II.TextExplanation,Theconnectingrodtransmitstheup-and-downmotionofthepistontothecrankshaft,whichchangesitintorotarymotion.transmitto把传到whichchangesitintorotarymotion定语从句,II.TextExplanation,dieselengineswaterpumptheignitiondistributoroilpantiminggearcrankshaftandconnectingrodmechanismvalvegearfuelsystemexhaustpipeexhaustmanifold,III.Exercises,TranslatethefollowingexpressionsintoChinese.,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-valve,III.Exercises,Thecrankshaftrepresentsthefinallinkintheconversionofreciprocatingmotionatthepistontooneofrotationattheflywheel.Inthecastofthemulti-cylinderengine,thecrankshafthastocontroltherelativemotionsofthepistons,whilereceivingtheirownimpulses.Aone-piececonstructionismostcommonlyusedforthemotor-vehiclecrankshaft,whichextendsthewholelengthoftheengineandmustthereforepossessconsiderablerigidity.,III.Exercises,Thetiming-drivefortheenginevalvemechanismistakenfromthefrontendofthecrankshaftasisthepulleyandbeltdrivefortheengineauxiliaries,suchasthecoolingfanandthealternatorforelectricalsystem.attachedtotherearendofthecrankshaftistheengineflywheel.,III.Exercises,I.TranslatethefollowingsentencesintoChinese.1Engineisthepowersourceoftheautomobile.Powerisproducedbythelinearmotionofapistoninacylinder.发动机是汽车的动力源.它通过汽缸内的活塞线性运动产生的.2Thefuelsystemworksaccordingtotherequirementsoftheengineasitprovidesanair-fuelmixturewhichmustbeinproportiontothespeedandloadplacedontheengine.燃油系统的作用是根据发动机的转速和负荷提供一定比例的可燃混合气以满足发动机的需求。,III.Exercises,3Thevalvegearprovidestimelyadmissionofthefreshcharge