Unit 1 汽车专业英语 车辆的种类汽车基本结构.ppt

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1、UnitoneAutomobileBasicsContentsPre-questionsII.TextExplanationIII.ExercisesTypesofModernAutomobiles1）cars2）passengercars3）trucks4）tractorsandvehiclecombination5）specialtypevehicle6）Self-dumpingcar7）farmvehicle8)off-roadvehiclePre-questionsSpecialvehiclecarTractorTruckPa

2、ssengerCars2、withrespecttoenginearrangementanddrivingtypeenginearrangementanddrivingtypediagramfrontengine、front-wheeldrivefrontengine、rear-wheeldriveRearengine、rear-wheeldrivePre-questionsDoyouknowwhobuiltthefirstcarintheworldandwhen?KarlBenzIn1886Pre-questionsHowmanym

3、ainpartsdoestheautomobileconsistof?1-engine2-chassis3-body4--electricalsystemPre-questionsNewWordsandNewWordsandExpressionscomponent[kəm'pəunənt]n.成分，组成，部件，零件chassis['∫æsi]n.底盘transmission[trænz'mi∫ən]n.变速器，传动,传动系统，传送，发射ignite[ig'nait]v.点火,点燃suspension[səs'pen∫ən]n.悬架，悬

4、挂NewWordsandNewWordsandExpressionsspark-ignitionengine点燃式发动机compression-ignitionengine压燃式发动机storagebattery蓄电池ignitioncoil点火线圈powertrain传动系，动力装置propellershaft传动轴(=driveshaft)SectionATheBasicComponentsofanAutomobileToday'saveragecarcontainsmorethan15,000separate,individua

5、lpartsthatmustworktogether.Thesepartscanbegroupedintofourmajorcategories:engine,body,chassisandelectricalequipments.EngineTheengineactsasthepowerunit.Theinternalcombustionengineismostcommon:thisobtainsitspowerbyburningaliquidfuelinsidetheenginecylinder.Therearetwotypeso

6、fengine:gasoline(alsocalledaspark-ignitionengine)anddiesel(alsocalledacompression-ignitionengine).Bothenginesarecalledheatengines;theburningfuelgeneratesheatwhichcausesthegasinsidethecylindertoincreaseitspressureandsupplypowertorotateashaftconnectedtothetransmission.Cha

7、ssisThechassisisanassemblyofthosesystemsthatarethemajoroperatingpartsofavehicle.Thechassisincludesthepowertrain,suspension,steering,andbrakesystems.BodyAnautomobilebodyisasheetmetalshellwithwindows,doors,ahood,andatrunkdeckbuiltintoit.Itprovidesaprotectivecoveringforthe

8、engine,passengers,andcargo.Thebodyisdesignedtokeeppassengerssafeandcomfortable.ElectricalEquipmentTheelectrica