图解汽车维修英语

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

2、ntranslatethemintocorrespondingChineseterms.1.CISconventionalignitionsystem_________________2.EISelectronicignitionsystem_________________3.ITDCignitiontopdeadcenter__________________4.DLIdistributorlessignition__________________5.ITignitiontiming__________________6.C3Icomputerc

3、ontrolledcoilignition__________________7.DFIdirect－fireignition__________________Unit7EngineStartingSystem63Thestartingsyetemistheheartoftheelectricalsysteminyourcar.Thestartingsystemperformsthisfunctionbychangingelectricalenergyfromthebatterytomechanicalenergyinthestartingmotor

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

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

6、ircuit6－startingsafetyswitch7－ignitionswitchThefunctionofthestartingsystemistocrankingtheenginefastenoughtoallowtheenginetostart.Thestartingsystemandignitionsystemmustworktogetherforgoodenginestarting.Theautomotivebatteryservesasanenergy“bank”.Itreceivesfromthevehicle＇schargings

7、ystemandstoresituntilneeded.Thenitprovidestheenergytomostelectrical63systemsondemand.Thebatteryconvertsitbackintoelectricityduringdischarging.Thekeyswitch,orignitionswitch,controlstheignitioncircuit.Italsocontrolsthestartingsystemandthepowerfortheinstrumentsandvehicleaccessories

8、.Thestartermotor,orstarter,isacompactbutverypow