汽车专业英语（发动机部分）ppt课件.ppt

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1、AutomobileEnglishLesson3-3LookatthepictureII.IdentifytheEnglishnamesofthedrivelineaccordingtothepicture.1.engine;2.transmission;3.driveshaft;4.drivingwheel;5.clutch;6.universaljoint;7.finaldriveSingle-cylinderenginecylinderpistonPistonpinConnectingrodcrankshaftOilpipeInletvalveExhaustvalveTimingge

2、arOilpumpTheenginecomprisestwomechanismandfivesystems,whatarethey?crankshaftandconnectingrodmechanismValvemechanismCoolingsystemLubricationsystemfuelsupplysystemStartingsystemIgnitionsystemconnectingrodflywheelcrankshaftpistoninletvalveexhaustvalvepushrodtappettiminggears■Valvegear■ConnectingrodEn

3、gineBodycrankcasecylinderblockcylinderheadcylinderoilpassageandwaterpassageoilpanThecylindergasketWhatistheengineblockcomprisedof?thecylindersectionandthecrankcasesection有个小问题！thecylindercrankcase汽缸体曲轴箱cylindergasketcylinderheadCylinderheadcoverpadtofitsparkplugPre-questions练一练1-cylinderheadcover;

4、2-cylinderhead;3-cylindergasket;4-cylinderblock;5-oilpan油底壳气缸垫气缸体气缸盖罩气缸盖ThepistonPistontoppistonringspistonpinconnectingrodComponentsofpistonpistontoppistonheadpistonskirt活塞销孔PistonpinholeSmallendConnectingrodbushingConnectingrodBigendConnectingrodhalfshellsConnectingrodcapcompressionringsoilrings

5、pistonpinpistonconnectingrodcrankbearinghalfshellconnectingrodcapIII.ExercisesPre-questionsWhat’sthecrankshaftassemblycomposedof?crankshaftbearingstiminggearflywheelbeltpulleypistonPre-questionsWhatisregardedasthe“backbone”oftheengineandwhy?Crankshaft,becauseitcanchangethereciprocatingmotion(往复运动)

6、ofthepistonintorotary(旋转)motionandhandle(处理)theentire(全部)poweroutput.Regardas------译为：被叫做-------What’sthefunctionoftheflywheel?helpingtheenginetorunsmoothly(平稳)duringthepowerstrokeandreleasing(释放)itduringtheotherstrokes；carryingtheclutch,whichtransmits(传输)thedrivetothegearbox；hasthestarterringgear

7、，aroundits.Pre-questions功能Whereistheflywheelintheengine?therearofthecrankshaft.Pre-questionsthestarterringgear起动环形齿轮Whatisthefunctionofthevalvegearinaninternalcombustionengine?Opentheinletvalveintimeandlettheair-