汽车专业实用英语 教学课件 作者 陈晟闽 19-Antilock Brake system Operation.ppt

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1、WelcomeToAntilockBrakeSystemOperation&DiagnosisSECTION19ObjectivesExplainhowantilockbrakesystemsworktobringavehicletoacontrolledstop.Describethedifferencesbetweenanintegratedandanon-integratedantilockbrakesystem.Brieflydescribethemajorcomponentsofatwo-wheelantilockbrakesystem.con

2、tinued…ObjectivesBrieflydescribethemajorcomponentsofafour-wheelantilockbrakesystem.Describetheoperationofthemajorcomponentsofanantilockbrakesystem.Describetheoperationofthemajorcomponentsofautomatictractionandstabilitycontrolsystems.continued…ObjectivesExplainthebestprocedureforf

3、indingABSfaults.Listtheprecautionsthatshouldbefollowedwheneverworkingonanantilockbrakesystem.continued…ABSFeaturesTheABSsystempulsesthebrakesmorerapidlythanthedrivercan(upto15timespersecond).Pulsingthebrakespreventswheellockup.Preventingwheellockupprovidesformorestablestopping.Pr

4、eventingwheelslipallowsthewheelstoturnasdirected.continued…ACommonABSSystemcontinued…HydraulicComponentsControlvalveassemblyControlsthereleaseandapplicationofbrakesystempressuretothewheelbrakeassemblies.BoosterpumpProvidespressurizedhydraulicfluidfortheABSsystem.continued…Hydraul

5、icComponentsBooster/mastercylinderassemblyContainsthevalvesandpistonsusedtomodulatehydraulicpressureduringABSoperation.continued…HydraulicComponentsFluidaccumulatorStoresfluidthatisremovedfromthewheelcircuitsduringtheABScycle.continued…HydraulicComponentsHydrauliccontrolunitConta

6、insseveralcomponentsinoneunit.HydraulicvalvesControlanddirecthydraulicpressure.SolenoidvalvesMainvalveWheelcircuitvalvescontinued…Electrical/ElectronicComponentsControlmoduleControlsABSoperationandmonitorsthesystem.continued…Electrical/ElectronicComponentsBrakepedalswitchSignalst

7、hecontrolmodulewhenthebrakeisapplied.DataLinkConnector(DLC)Providesaccesstoand/orcontrolofvehicleinformation.LateralpositionsensorIsusedonsomesystemstomonitorsidewaysmovementofthevehicle.continued…Electrical/ElectronicComponentsPressureswitchControlspumpoperationandthelowpressure

8、warninglamp.PressuredifferentialswitchSe