图解汽车维修英语.doc

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1、III.Writeoutthetermsaccordingtothepicture1.________2.________3.________4.________5.________6.________7.________8.________9.________IV.Abbreviationsareveryusefulinpracticalwork.DoyouknowthefollowingEnglishabbreviationsyouoftencomeacrossinhandlingautomotivematerials?Readthemandthent

2、ranslatethemintocorrespondingChineseterms.1.CISconventionalignitionsystem_________________2.EISelectronicignitionsystem_________________3.ITDCignitiontopdeadcenter__________________4.DLIdistributorlessignition__________________5.ITignitiontiming__________________6.C3Icomputercontr

3、olledcoilignition__________________7.DFIdirect－fireignition__________________Unit7EngineStartingSystemThestartingsyetemistheheartoftheelectricalsysteminyourcar.Thestartingsystemperformsthisfunctionbychangingelectricalenergyfromthebatterytomechanicalenergyinthestartingmotor.Thismot

4、orthentransfersthemechanicalenergy,throughgears,totheflywheelontheengine＇scrankshaft.Duringcranking,theflywheelrotatesandtheair－fuelmixtureisdrawnintothecylinders,compressed,andignitedtostarttheengine.Mostenginesrequireacrankingspeedofabout200r／min.Thestartingsystemincludesthefoll

5、owingcomponents:battery,cableandwires,ignitionswitch,startersolenoidorrelay,startermotor,starterdriveandflywheelringgear.Fig.2－7－1isthecomponentsinasimplifiedcrankingsystemcircuit.Fig.2－7－1Startingsystem1－battery2－startingcircuit3－magneticswitch4－startermotor5－controlcircuit6－star

6、tingsafetyswitch7－ignitionswitchThefunctionofthestartingsystemistocrankingtheenginefastenoughtoallowtheenginetostart.Thestartingsystemandignitionsystemmustworktogetherforgoodenginestarting.Theautomotivebatteryservesasanenergy“bank”.Itreceivesfromthevehicle＇schargingsystemandstores

7、ituntilneeded.Thenitprovidestheenergytomostelectricalsystemsondemand.Thebatteryconvertsitbackintoelectricityduringdischarging.Thekeyswitch,orignitionswitch,controlstheignitioncircuit.Italsocontrolsthestartingsystemandthepowerfortheinstrumentsandvehicleaccessories.Thestartermotor,o

8、rstarter,isacompactbutverypowerfu