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Chapter6AutomotiveElectricalandElectronicSystems 6 1LeadAcidBatteryandCircuitprotectiondevices6 2ChargingSystem6 3StartingSystem6 4IgnitionSystems6 5LightingSystem6 6powerwindowsystem6 7SupplementalRestraintSystems6 8Cruisecontrolsystems6 9AntiTheftSystems6 10AirConditioning Chapter6AutomotiveElectricalandElectronicSystems6 1LeadAcidBatteryandCircuitprotectiondevices NewWords Chapter6AutomotiveElectricalandElectronicSystems6 1LeadAcidBatteryandCircuitprotectiondevices 6 1 1lead acidstoragebatteryAlead acidstoragebattery Figure6 1 isanelectrochemicaldevicethatproducesvoltageanddeliverselectricalcurrent Thebatteryistheprimary source ofelectricalenergyusedinvehiclestoday Whencharging thebatteryconvertselectricityintochemicalenergy andwhendischarging itconvertschemicalenergyintoelectricity producingacurrent 6 1 2CircuitprotectiondevicesItisnecessarytoprotectelectricalcircuitagainstshorting accidentallytouchingground thatcouldburnupthewiring Electricalunitsmustbeprotectedagainstoverloadsalso Incircuits Circuitprotectiondevicesmustbeinstalledinserieswiththeelectricaldevicesorwiringtobeprotected Thecommontypesofcircuitprotectiondevicesarefuse fusiblelinkandcircuitbreaker seeTable6 1 Chapter6AutomotiveElectricalandElectronicSystems6 1LeadAcidBatteryandCircuitprotectiondevices Allofthevehiclefusesareusuallycontainedinaholdercalledfuseblockorrelayblock Figure6 2and6 3 Acircuitmaybeprotectedbyaspecialwirethatactsasafuse Thiswireiscalledafusiblelink ACircuitbreakerfeedscurrentthroughabimetallicstripandasetofpointstotheremainderofthecircuit Whenthecurrentexceedsthebreaker srating thebimetallicstripheatsandbendstoseparatethepoints Onceitcools itwillclosethecircuit Relaysareusedtodirectlargecurrentflowsthatmightoverheatanddamageaswitch theyareatypeofsolenoidswitchthatcloseselectricalcontacts Mostofrelaysareusuallycontainedinrelayblockandjunctionblock J B Figure6 1Batteryconstruction Chapter6AutomotiveElectricalandElectronicSystems6 1LeadAcidBatteryandCircuitprotectiondevices Table6 1CircuitprotectiondevicesusedforToyotaautomotivewiringdiaghrams Chapter6AutomotiveElectricalandElectronicSystems6 1LeadAcidBatteryandCircuitprotectiondevices Figure6 2Locationofuseblock relayblockandjunctionblockinapassengercar Chapter6AutomotiveElectricalandElectronicSystems6 1LeadAcidBatteryandCircuitprotectiondevices Figure6 3Locationofuseblock relayblockandjunctionblockinavan Chapter6AutomotiveElectricalandElectronicSystems6 2ChargingSystem NewWords Thechargingsystemusestherotationoftheenginetocreateelectricity Theelectricityrechargesthebatteryandprovidespowertooperatethevariousvehicleelectricalsystems Themodernvehiclechargingsystemconsistsofalternatorandvoltageregulator Figure6 4and6 5 Chapter6AutomotiveElectricalandElectronicSystems6 2ChargingSystem Figure6 4ComponentsofatypicalACgenerator Chapter6AutomotiveElectricalandElectronicSystems6 2ChargingSystem Figure6 5Explodedviewofatypicalalternator withvoltageregulator Chapter6AutomotiveElectricalandElectronicSystems6 3StartingSystem Moderninternalcombustionenginesarestartedbyusingelectricstartingmotor orstarter Figure6 6 6 7and6 8 Astartingsystemconsistsofbattery ignitionswitch starterrelayandstarter Toenergizethestarter theignitionswitchisturnedtoSTART whichcompletesanelectricalcircuit Whenthestarterbeginstoturnthestartergearmovesoutandengagestheringgear whichspinsthecrankshaft NewWords Chapter6AutomotiveElectricalandElectronicSystems6 3StartingSystem Figure6 6Startingmotorcomponents Chap
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