First
let’s see the channel of flow of air
1.
Air compressor piston pump
2.
Air governor
3.
Air dryer
4.
Dual air duct
5.
Air tank
6.
Actuator
WORKING:
We have seen an extra piston cylinder is
mounted over an auto-mobile engine in which we do not pour any fuel it just
move up & down! But wait it play very important role regarding our safety
yes it compresses the air for power brakes used in vehicle.
So now we know that air is supplied and
compressed in AIR COMPRESSOR PISTON CYLINDER, now air travel from here to
GOVERNOR through pipeline via DUAL AIR DUCT*
DUAL AIR DUCT: it act as the inlet &
outlet port for air it has total 6 port with marking as follows
11-inlet to air dryer,
12-optional or helper port for driver in
case he want air to fill in tire,
21 & 22- one of this port is connected
to the air tank for front wheels & other port is connected to the pressure
measuring gauge on driver’s dashboard.
23 & 24-smilarly here also one of this port is connected to the air
tank for rear wheels & other port is connected to the pressure measuring
gauge on drivers dashboard.
AIR DRYER: As name signify dryer it means that is dry air from moisture, oil,
dirt and other impurities coming from the air compressing piston it is very
necessary that air should be free from all impurities because if it doesn’t
happen moisture and oil particles will get accumulated in tank and even cause choking
of pipe line joining the tank and actuators.
AIR GOVERNOR: After completely drying the air
the air governor according to load send air to tank and it also indicates that
air is completely filled and dried by sneezing the air which cause a formation
of sound as which cause when a human sneeze! When air is completely filed the
governor send the air to tank. Sometimes you have heard a sound come from
automobile of leaking of air it is sound that indicates that air dryer is
completely filled.
AIR TANK: You have seen 2 tank are mounted
horizontally with chassis in buses or truck they are just for accumulating air
at times need of pressurized air while braking!
ACTUATORS: They are the devices which are
mounted on the S-CAM. The function of the actuators is when pressurized air come into the actuators the
spring inside expand or contract due to
this handle which is attached to S-CAM
also moves, due to movement of S-cam
the break shoe expand and get contact with hub and provide resistance
there and our wheel stops.
Categories:
automobile,
mechanical