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附录AAUTOMOBILEBRAKESYSTEMTHEBRAKINGSYSTEMISTHEMOSTIMPORTANTSYSTEMINCARSIFTHEBRAKESFAIL,THERESULTCANBEDISASTROUSBRAKESAREACTUALLYENERGYCONVERSIONDEVICES,WHICHCONVERTTHEKINETICENERGYMOMENTUMOFTHEVEHICLEINTOTHERMALENERGYHEATWHENSTEPPINGONTHEBRAKES,THEDRIVERCOMMANDSASTOPPINGFORCETENTIMESASPOWERFULASTHEFORCETHATPUTSTHECARINMOTIONTHEBRAKINGSYSTEMCANEXERTTHOUSANDSOFPOUNDSOFPRESSUREONEACHOFTHEFOURBRAKESTWOCOMPLETEINDEPENDENTBRAKINGSYSTEMSAREUSEDONTHECARTHEYARETHESERVICEBRAKEANDTHEPARKINGBRAKETHESERVICEBRAKEACTSTOSLOW,STOP,ORHOLDTHEVEHICLEDURINGNORMALDRIVINGTHEYAREFOOTOPERATEDBYTHEDRIVERDEPRESSINGANDRELEASINGTHEBRAKEPEDALTHEPRIMARYPURPOSEOFTHEBRAKEISTOHOLDTHEVEHICLESTATIONARYWHILEITISUNATTENDEDTHEPARKINGBRAKEISMECHANICALLYOPERATEDBYWHENASEPARATEPARKINGBRAKEFOOTPEDALORHANDLEVERISSETTHEBRAKESYSTEMISCOMPOSEDOFTHEFOLLOWINGBASICCOMPONENTSTHE“MASTERCYLINDER”WHICHISLOCATEDUNDERTHEHOOD,ANDISDIRECTLYCONNECTEDTOTHEBRAKEPEDAL,CONVERTSDRIVERFOOT’SMECHANICALPRESSUREINTOHYDRAULICPRESSURESTEEL“BRAKELINES”ANDFL
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