奥迪全系自学手册（SSP）：ssp285_Running Gear in the Audi A8_2_GB.pdf

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1、BrakeSystemBrakeservoBrakemastercylinderUseismadeofatandemvacuum-typebrakeUseismadeofatandembrakemasterservo(8+9inch,basicdesignasforA4andcylinder.A6).IncomparisontotheA4andA6,theAscomparedtotheA4andA6,thepistontransmissionratiohasbeenincreasedto7:1.diameterwasincreasedto26.99mmwithaTheinletvalvefl

2、owcharacteristicshavebeentotalstrokeof36mm(18/18).optimisedandthevalveclosingdistanceThecentralvalvesofbothbrakecircuitsshortened.Thisresultsinfarquickerand(diagonalconfiguration)havebeendesignedmorepreciseservoresponseaccompaniedforoptimumflow.Thispermitstheuseofabyagreatlyimprovedoperatingfeel.se

3、lf-primingESPunitwithoutaseparateWithV8petrolengines,vacuumissuppliedchargingpump.byasuctionjetpumpdrivenbytheintakeThesechangesandtheabove-mentionedmanifoldvacuum.modificationstothebrakeservoresultinaAnelectricvacuumpumpisemployedforthesignificantreductioninpedaltravelpriortoV6petrolengine.brakere

4、sponseinconjunctionwithlesspedalforce.Activesafetyisthusenhancedbyshorteningthestoppingdistance.BrakefluidreservoirThebrakefluidreservoirisaseparatecomponentfittedintothebrakemastercylinder.Fordesignreasons,thebrakefluidreservoirisnevertobecompletelydrained,asthiswouldpermittheingressofairintothepi

5、pesonaccountofthepositionoftheconnections.RefertothecurrentWorkshopManualforprocedureforchangingbrakefluid.BrakefluidreservoirBrakeservoBrakemastercylinder285_03632Notes33Electromech.ParkingBrakeSummaryElectromechanicalRightparkingbrakeparkingbrakecontrolmotorV283unitJ540ParkingbrakepressureswitchF

6、234LeftparkingbrakemotorV282ControlunitwithdisplayindashpanelinsertJ285285_09134OperationanddisplayTheparkingbrakeisactuatedbythepressureswitchF234inthecentreconsole.Thebrakeisappliedbypullingtheswitch.Itisreleasedbypressingtheswitchandatthesametimepressingthebrakeoracceleratorpedal.Theelectromecha

7、nicalparkingbrakecanstillbeappliedbypullingtheswitchevenwhentheignitionisoff.Theignitionmusthoweverbeswitchedonforthebraketobereleased.285_041Applicationoftheparkingbrakeisindicatedbytheparkingbrakedisplayi