汽车专业实用英语 教学课件 作者 陈晟闽 20-Diagnosing Suspension System.ppt

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1、WelcomeToSuspensionSystemOperation&DiagnosisSECTION20ObjectivesNamethedifferenttypesofspringsandhowtheyoperate.Nametheadvantagesofballjointsuspensions.Explaintheimportantdifferencesbetweensprungandunsprungweightwithregardtosuspensioncontroldevices.continued…Objecti

2、vesIdentifythefunctionsofshockabsorbersandstrutsanddescribetheirbasicconstruction.IdentifythecomponentsofaMacPhersonstrutsystemanddescribetheirfunctions.Identifythefunctionsofbushingsandstabilizers.continued…ObjectivesPerformageneralfrontsuspensioninspection.Checkc

3、hassisheightmeasurementstospecifications.Identifythethreebasictypesofrearsuspensionsandknowtheireffectsontractionandtirewear.continued…ObjectivesIdentifythevarioustypesofsprings,theirfunctions,andtheirlocationsintherearaxlehousing.Describetheadvantagesandoperationo

4、fthethreebasicelectronicallycontrolledsuspensionsystems:levelcontrol,adaptive,andactive.continued…ObjectivesExplainthefunctionofelectronicsuspensioncomponents,includingaircompressors,sensors,controlmodules,airshocks,electronicshockabsorbers,andelectronicstruts.Expl

5、ainthebasictowing,lifting,jacking,andserviceprecautionsthatmustbefollowedwhenservicingairspringsandotherelectronicsuspensioncomponents.continued…TypesofVehicleConstructionUnitizedbodyTendstobemoretightlystructured.Isdesignedtotransmitimpactenergythroughoutthevehicl

6、e.BodyoverframeThebodyandallmajorpartsareboltedtotheframe.DesignisusedonmanypickupsandSUVs.continued…DefinitionsSpringAcomponentusedtoabsorbshockforceswhilemaintainingvehicleheight.Absorbsenergyoncompression(jounce)andreleasesenergyduringextension(rebound).Shockabs

7、orberAcomponentusedtodamporcontrolmotioninavehicle.Shockabsorbersdampenspringoscillations.continued…SpringTypesCoilAirSingle-leafMultileafTorsionbarcontinued…TypesofShockAbsorbersHydraulicUseshydraulicoil.Gas-chargedUsesnitrogengasaswellasoil.AirUsesairchamberstoco

8、ntroltheheightoftheshock.continued…TypesofShockAbsorberscontinued…MacPhersonStrutComponentsSpringShockabsorberUppersuspensionmountorlocatorcontin