汽車專業(yè)英語課件(宋進(jìn)桂)Chapter 6-4-7

Chapter6AutomotiveElectricalandElectronicSystems

6.1LeadAcidBatteryandCircuitprotectiondevices

6.2ChargingSystem6.3StartingSystem6.4IgnitionSystems6.5LightingSystem6.6powerwindowsystem6.7SupplementalRestraintSystems6.8Cruisecontrolsystems6.9AntiTheftSystems6.10AirConditioningChapter6AutomotiveElectricalandElectronicSystems

6.4IgnitionSystems

NewWordsresponsible[ri'sp?ns?bl]a.有責(zé)任感的，有責(zé)任的，負(fù)責(zé)的distinct[di'sti?kt]a.截然不同的，有區(qū)別的，明顯的，清楚的electronics[ilek'tr?niks]n.電子學(xué)，電子設(shè)備reliability[ri?lai?'biliti]n.可靠性，可靠程度advent['?dv?nt]n.出現(xiàn)，到來on-boarda.在船上，在車上Chapter6AutomotiveElectricalandElectronicSystems

6.4IgnitionSystems

NewWordsconfirmation[?k?nf?'mei??n]n.確定，確認(rèn)，證實(shí)ohmmeter['?um?mi:t?]n.歐姆計(jì)，電阻表tension['ten??n]n.拉緊，繃緊，拉力，張力，電壓condenser[k?n'dens?]n.冷凝器電容器pickup['pik?p]n.收集，整理，拾音器，傳感器，皮卡integrate['intigreit]v.使成一體，使結(jié)合，使合并Chapter6AutomotiveElectricalandElectronicSystems

6.4IgnitionSystems

Thepurposeoftheignitionsystemistocreateasparkthatwillignitethefuel-airmixtureinthecylinderofanengine.Theignitionsystemisdividedintotwosections,theprimarycircuitandthesecondarycircuit.Thelowvoltageprimarycircuitoperatesatbatteryvoltage(12to14.5volts)andisresponsibleforgeneratingthesignaltofirethesparkplugattheexactrighttimeandsendingthatsignaltotheignitioncoil.Theignitioncoilisthecomponentthatconvertsthe12voltsignalintothehigh20,000+voltcharge.Oncethevoltageissteppedup,itgoestothesecondarycircuitwhichthendirectsthechargetothecorrectsparkplugattherighttime.Chapter6AutomotiveElectricalandElectronicSystems

6.4IgnitionSystems

Therearethreedistincttypesofignitionsystems.Theconventionalignitionsystem(Figure6-9)wasmechanicalandelectricalandusednoelectronics.Theelectronicignitionsystem(Figure6-10)startedfindingitswaytoproductionvehiclesduringtheearly'70sandbecamepopularwhenbettercontrolandimprovedreliabilitybecameimportantwiththeadventofemissioncontrols.Finally,thedistributorlessignitionsystem(Figure6-11)becameavailableinthemid'80s.Thissystemwasalwayscomputercontrolledandcontainednomovingparts,soreliabilitywasgreatlyimproved.Theignitionsystemsonnewerautomobilesarecompletelycontrolledbytheon-boardcomputer.

Atypical4-cylinderenginehas2coilsthataremountedtogetherinacoil"pack".Chapter6AutomotiveElectricalandElectronicSystems

6.4IgnitionSystems

Onsomevehicles,thereisanindividualcoilforeachcylindermounteddirectlyontopofthesparkplug.Theindependentignitionsystemwithintegratedignitionmodulesintoeachcoilassemblytypicallyusefourwiresconnectedtotheprimarysideoftheassembly(Figure6-12).Thefourwiresconsistofbatterypositive,ground,ignitiontimingsignal,andignitionconfirmationsignal.ThePCMusestheignitionconfirmationsignaltodetermineifacoilisnotoperating.Theprimarycircuitsofthesecoilscannotbetestedwithanohmmeter.Thisdesigncompletelyeliminatesthehightensionsparkplugwiresforevenbetterreliability.Mostofthesesystemsusesparkplugsthataredesignedtolastover100,000miles,whichcutsdownonmaintenancecosts.Chapter6AutomotiveElectricalandElectronicSystems

6.4IgnitionSystems

Figure6-9ConventionalignitionsystemChapter6AutomotiveElectricalandElectronicSystems

6.4IgnitionSystems

Figure6-10AelectronicignitionsystemChapter6AutomotiveElectricalandElectronicSystems

6.4IgnitionSystems

Figure6-11Adistributorlessignitionsystemcircuit

Figure6-12AindependentignitionsystemthatintegratestheignitionmoduleintoeachcoilassemblyChapter6AutomotiveElectricalandElectronicSystems

6.5LightingSystem

headlight['hedlait]n.前照燈taillight['teillait]n.尾燈dimmer['dim?]n.調(diào)光器courtesy['k?:tisi]n.禮貌，殷勤，好意hazard['h?z?d]n.危險(xiǎn)，危害物NewWords

6.5.1headlightandtaillightsystem(Figure6-13)Figure6-13HeadlightandtaillightsystemChapter6AutomotiveElectricalandElectronicSystems

6.5LightingSystem

6.5.2Turnsignalandhazardwarninglightsystem(Figure6-14)

Figure6-14Turnsignalandhazardwarninglightsystem

6.5.2Turnsignalandhazardwarninglightsystem(Figure6-14)Chapter6AutomotiveElectricalandElectronicSystems

6.5LightingSystem

6.5.3Stoplightsystembackuplight(Figure6-15)

Figure6-15Stoplightsystem

6.5.4Interiorlightsystem(Figure6-16)Figure6-16InteriorlightsystemChapter6AutomotiveElectricalandElectronicSystems

6.6powerwindowsystem

ApowerwindowsystemisshowinFigure6-17.Figure6-17PowerwindowsystemChapter6AutomotiveElectricalandElectronicSystems

6.7SupplementalRestraintSystems

NewWordsrestraint[ri'streint]n.約束，控制，阻止，約束措施inflation[in'flei??n]n.通貨膨脹，膨脹，充氣sodium['s?udi?m]n.鈉azide['?zaid]n.疊氮化物potassium[p?'t?si?m]n.鉀nitrate['naitreit]n.硝酸鹽pad[p?d]n.墊，襯墊，護(hù)墊pretensionern.預(yù)收[張]緊器[裝置]Chapter6AutomotiveElectricalandElectronicSystems

6.7SupplementalRestraintSystems

Thesupplementalrestraintsystem(SRS)isdesignedtoworkinconcertwiththeseatbeltstofurtherpreventpersonalinjuryduringahead-oncollisionwithanotherobject.TheSRSutilizesanairbagmodule,frontimpactsensors,aclockspring(orspiralcable),andcontrolmodule.Withthebatterycablesconnected,theSRSsystemisenergizedandmonitoringthefrontimpactsensorsandthesafingsensorforcollisionconfirmationmessages.Whenthevehiclestrikes,orisstruckby,anotherobject,thefrontimpactsensorsandsafingsensorsendimpulsestothecontrolmodule,whichdeterminestheforceanddirectionoftheimpact.Basedonthisin