1 汽车专业英语课件-汽车基础知识部分-section 1汽车专业英语ppt课件-修改2017022710 Chapter 6 6 1-6 7

复习,1.制动系统的组成有哪些？2.ABS系统的组成、分类,提问,学习内容,本次课学习内容、目标和重点难点,学习目标,难点重点,Battery,Charging，Starting，Ignition，Lighting，powerwindowsystems,SupplementalRestraintSystems,1.掌握电源、充电、起动、点火、照明、电动车窗系统英文术语2.掌握点火系统原理和分类3.了解各个系统的主要功能,1.重点为发动机电气系统英文专业术语2.难点需要记忆的部件名称过多,Chapter6AutomotiveElectricalandElectronicSystems,6.1LeadAcidBatteryandCircuitprotectiondevices6.2ChargingSystem6.3StartingSystem6.4IgnitionSystems6.5LightingSystem6.6powerwindowsystem6.7SupplementalRestraintSystems6.8Cruisecontrolsystems6.9AntiTheftSystems6.10AirConditioning,Chapter6AutomotiveElectricalandElectronicSystems6.1LeadAcidBatteryandCircuitprotectiondevices,6.1.1NewWordsandPhrases,Chapter6AutomotiveElectricalandElectronicSystems6.1LeadAcidBatteryandCircuitprotectiondevices,6.1.1lead-acidstoragebatteryAlead-acidstoragebattery(Figure6-1)isanelectrochemicaldevicethatproducesvoltageanddeliverselectricalcurrent.Thebatteryistheprimarysourceofelectricalenergyusedinvehiclestoday.Whencharging,thebatteryconvertselectricityintochemicalenergy,andwhendischarging,itconvertschemicalenergyintoelectricity,producingacurrent.6.1.2CircuitprotectiondevicesItisnecessarytoprotectelectricalcircuitagainstshorting(accidentallytouchingground)thatcouldburnupthewiring.Electricalunitsmustbeprotectedagainstoverloadsalso.Incircuits,Circuitprotectiondevicesmustbeinstalledinserieswiththeelectricaldevicesorwiringtobeprotected.Thecommontypesofcircuitprotectiondevicesarefuse,fusiblelinkandcircuitbreaker,seeTable6-1.,Figure6-1Batteryconstruction,Chapter6AutomotiveElectricalandElectronicSystems6.1LeadAcidBatteryandCircuitprotectiondevices,Table6-1CircuitprotectiondevicesusedforToyotaautomotivewiringdiaghrams,Chapter6AutomotiveElectricalandElectronicSystems6.1LeadAcidBatteryandCircuitprotectiondevices,Allofthevehiclefusesareusuallycontainedinaholdercalledfuseblockorrelayblock(Figure6-2and6-3).Acircuitmaybeprotectedbyaspecialwirethatactsasafuse.Thiswireiscalledafusiblelink.ACircuitbreakerfeedscurrentthroughabimetallicstripandasetofpointstotheremainderofthecircuit.Whenthecurrentexceedsthebreakersrating,thebimetallicstripheatsandbendstoseparatethepoints.Onceitcools,itwillclosethecircuit.Relaysareusedtodirectlargecurrentflowsthatmightoverheatanddamageaswitch,theyareatypeofsolenoidswitchthatcloseselectricalcontacts.Mostofrelaysareusuallycontainedinrelayblockandjunctionblock(J/B).,Chapter6AutomotiveElectricalandElectronicSystems6.1LeadAcidBatteryandCircuitprotectiondevices,Figure6-2Locationofuseblock,relayblockandjunctionblockinapassengercar,Figure6-3Locationofuseblock,relayblockandjunctionblockinavan,Chapter6AutomotiveElectricalandElectronicSystems6.2ChargingSystem,Thechargingsystemusestherotationoftheenginetocreateelectricity.Theelectricityrechargesthebatteryandprovidespowertooperatethevariousvehicleelectricalsystems.Themodernvehiclechargingsystemconsistsofalternatorandvoltageregulator(Figure6-4and6-5).,Chapter6AutomotiveElectricalandElectronicSystems6.2ChargingSystem,Figure6-4ComponentsofatypicalACgenerator,Chapter6AutomotiveElectricalandElectronicSystems6.2ChargingSystem,Figure6-5Explodedviewofatypicalalternator(withvoltageregulator),Chapter6AutomotiveElectricalandElectronicSystems6.3StartingSystem,6.3.1NewWordsandPhrases,Chapter6AutomotiveElectricalandElectronicSystems6.3StartingSystem,Moderninternalcombustionenginesarestartedbyusingelectricstartingmotor,orstarter(Figure6-6,6-7and6-8).Astartingsystemconsistsofbattery,ignitionswitch,starterrelayandstarter.Toenergizethestarter,theignitionswitchisturnedtoSTART,whichcompletesanelectricalcircuit.Whenthestarterbeginstoturnthestartergearmovesoutandengagestheringgear,whichspinsthecrankshaft.,6.3.2Text,Chapter6AutomotiveElectricalandElectronicSystems6.3StartingSystem,Figure6-6Startingmotorcomponents,Chapter6AutomotiveElectricalandElectronicSystems6.3StartingSystem,Figure6-7Startermotorwithplanetaryreductiongears.,Figure6-8Explodedviewofatypicalstarter,Chapter6AutomotiveElectricalandElectronicSystems6.4IgnitionSystems,6.4.1NewWordsandPhrases,Chapter6AutomotiveElectricalandElectronicSystems6.4IgnitionSystems,Chapter6AutomotiveElectricalandElectronicSystems6.4IgnitionSystems,Thepurposeoftheignitionsystemistocreateasparkthatwillignitethefuel-airmixtureinthecylinderofanengine.Theignitionsystemisdividedintotwosections,theprimarycircuitandthesecondarycircuit.Thelowvoltageprimarycircuitoperatesatbatteryvoltage(12to14.5volts)andisresponsibleforgeneratingthesignaltofirethesparkplugattheexactrighttimeandsendingthatsignaltotheignitioncoil.Theignitioncoilisthecomponentthatconvertsthe12voltsignalintothehigh20,000+voltcharge.Oncethevoltageissteppedup,itgoestothesecondarycircuitwhichthendirectsthechargetothecorrectsparkplugattherighttime.,6.4.2Text,Chapter6AutomotiveElectricalandElectronicSystems6.4IgnitionSystems,Therearethreedistincttypesofignitionsystems.Theconventionalignitionsystem(Figure6-9)wasmechanicalandelectricalandusednoelectronics.Theelectronicignitionsystem(Figure6-10)startedfindingitswaytoproductionvehiclesduringtheearly70sandbecamepopularwhenbettercontrolandimprovedreliabilitybecameimportantwiththeadventofemissioncontrols.Finally,thedistributorlessignitionsystem(Figure6-11)becameavailableinthemid80s.Thissystemwasalwayscomputercontrolledandcontainednomovingparts,soreliabilitywasgreatlyimproved.Theignitionsystemsonnewerautomobilesarecompletelycontrolledbytheon-boardcomputer.Atypical4-cylinderenginehas2coilsthataremountedtogetherinacoilpack.,Chapter6AutomotiveElectricalandElectronicSystems6.4IgnitionSystems,Figure6-9Conventionalignitionsystem,Chapter6AutomotiveElectricalandElectronicSystems6.4IgnitionSystems,Figure6-10Aelectronicignitionsystem,Chapter6AutomotiveElectricalandElectronicSystems6.4IgnitionSystems,Figure6-11Adistributorlessignitionsystemcircuit,Chapter6AutomotiveElectricalandElectronicSystems6.4IgnitionSystems,Onsomevehicles,thereisanindividualcoilforeachcylindermounteddirectlyontopofthesparkplug.Theindependentignitionsystemwithintegratedignitionmodulesintoeachcoilassemblytypicallyusefourwiresconnectedtotheprimarysideoftheassembly(Figure6-12).Thefourwiresconsistofbatterypositive,ground,ignitiontimingsignal,andignitionconfirmationsignal.ThePCMusestheignitionconfirmationsignaltodetermineifacoilisnotoperating.Theprimarycircuitsofthesecoilscannotbetestedwithanohmmeter.Thisdesigncompletelyeliminatesthehightensionsparkplugwiresforevenbetterreliability.Mostofthesesystemsusesparkplugsthataredesignedtolastover100,000miles,whichcutsdownonmaintenancecosts.,Figure6-12Aindependentignitionsystemthatintegratestheignitionmoduleintoeachcoilassembly,Chapter6AutomotiveElectricalandElectronicSystems6.5LightingSystem,6.5.1NewWordsandPhrases,1.headlightandtaillightsystem(Figure6-13),Figure6-13Headlightandtaillightsystem,Chapter6AutomotiveElectricalandElectronicSystems6.5LightingSystem,6.5.2Turnsignalandhazardwarninglightsystem(Figure6-14),Figure6-14Turnsignalandhazardwarninglightsystem,2.Turnsignalandhazardwarninglightsystem(Figure6-14),Chapter6AutomotiveElectricalandElectronicSystems6.5LightingSystem,3.Stoplightsystemandbackuplight(Figure6-15),Figure6-15Stoplightsystem,4.Interiorlightsystem(Figure6-16),Figure6-16Interiorlightsystem,Chapter6AutomotiveElectricalandElectronicSystems6.6powerwindowsystem,Figure6-17Powerwindowsystem,Chapter6AutomotiveElectricalandElectronicSystems6.7SupplementalRestraintSystems,NewWords,Chapter6AutomotiveElectricalandElectronicSystems6.7SupplementalRestraintSystems,Chapter6AutomotiveElectricalandElectronicSystems6.7SupplementalRestraintSystems,Thesupplementalrestraintsystem(SRS)isdesignedtoworkinconcertwiththeseatbeltstofurtherpreventpersonalinjuryduringahead-oncollisionwithanotherobject.TheSRSutilizesanairbagmodule,frontimpactsensors,aclockspring(orspiralcable),andcontrolmodule.Withthebatterycablesconnected,theSRS