AutomobileBrakeSystem汽车制动系统
Thebraki
gsystemisthemostimporta
tsystemi
carsIfthebrakesfailtheresultca
bedisastrousBrakesareactuallye
ergyco
versio
deviceswhichco
verttheki
etice
ergymome
tumofthevehiclei
tothermale
ergyheatWhe
steppi
go
thebrakesthedrivercomma
dsastoppi
gforcete
timesaspowerfulastheforcethatputsthecari
motio
Thebraki
gsystemca
exertthousa
dsofpou
dsofpressureo
eachofthefourbrakesTwocompletei
depe
de
tbraki
gsystemsareusedo
thecarTheyaretheservicebrakea
dtheparki
gbrakeTheservicebrakeactstoslowstoporholdthevehicleduri
g
ormaldrivi
gTheyarefootoperatedbythedriverdepressi
ga
dreleasi
gthebrakepedalTheprimarypurposeofthebrakeistoholdthevehiclestatio
arywhileitisu
atte
dedTheparki
gbrakeismecha
icallyoperatedbywhe
aseparateparki
gbrakefootpedalorha
dleverissetThebrakesystemiscomposedofthefollowi
gbasiccompo
e
tsthe“mastercyli
der”whichislocatedu
derthehooda
disdirectlyco
ectedtothebrakepedalco
vertsdriverfoot’smecha
icalpressurei
tohydraulicpressureSteel“brakeli
es”a
dflexible“brakehoses”co
ectthemastercyli
dertothe“slavecyli
ders”locatedateachwheelBrakefluidspeciallydesig
edtoworki
extremeco
ditio
sfillsthesystem“Shoes”a
d“pads”arepushedbytheslavecyli
derstoco
tactthe“drums”a
d“rotors”thuscausi
gdragwhichhopefullyslowsthecarThetypicalbrakesystemco
sistsofdiskbrakesi
fro
ta
deitherdiskordrumbrakesi
therearco
ectedbyasystemoftubesa
dhosesthatli
kthebrakeateachwheeltothemastercyli
derFigureBasicallyallcarbrakesarefrictio
brakesWhe
thedriverappliesthebraketheco
troldeviceforcesbrakeshoesorpadsagai
sttherotati
gbrakedrumordisksatwheelFrictio
betwee
theshoesorpadsa
dthedrumsordisksthe
slowsorstopsthewheelsothatthecarisbraked
fI
mostmoder
brakesystemsseeFigure151thereisafluidfilledcyli
dercalledmastercyli
derwhichco
tai
stwoseparatesectio
sthereisapisto
i
eachsectio
a
dbothpisto
sareco
ectedtoabrakepedali
thedriver’scompartme
tWhe
thebrakeispusheddow
brakefluidisse
tfromthemastercyli
dertothewheelsAtthewheelsthefluidpushesshoesorpadsagai
strevolvi
gdrumsordisksThefrictio
betwee
thestatio
aryshoesorpadsa
dtherevolvi
gdrumsordisksslowsa
dstopsthemThisslowsorstopstherevolvi
gwheelswhichi
tur
sloworstopthecarThebrakefluidreservoiriso
topofthemastercyli
derMostcarstodayhaveatra
spare
trreservoirsothatyouca
seethelevelwithoutope
i
gthecoverThebrakefluidlevelwilldropslightlyasthebrakepadswearThisisa
ormalco
ditio
a
d
ocauseforco
cer
Ifthelr