- Front/rear shell
- Power piston ( diaphragm plate and valve body )
- Input rod
- Poppet seal
- Output rod
- Reaction disc
When the brake pedal is not depressed
The input rod,power piston and output rod are forced to the right by the diaphragm return spring.the air valve , consisting of the valve plunger and the interior of the poppet seal,closes, allowing no air to enter chamber B.Further, since the vacum seal, consisting of a power and exterior of the poppet seal, is open, chamber A is connected to chamber B through a vent hole provided in the power piston. both chambers contain a vacum due to the vacuum in the intake manifold.
When the brake pedal is depressed
When the brake pedal is depressed, the input rod and poppet seal move to the left( front), the vacum valve closes,and the vent hole connecting chambers A and B is blocked.Futher movement of input rod pushes the valve plunger and forces the air valve to open ,and air enters chambers B through a gap between the input rod and poppet seal.this causes a pressure differential between the two sides of power piston.The force resulting from this difference in pressure overcomes the force of the diaphragm return spring,moving the power piston to the letf ( front).The leftward movementof the power piston actuates the output rod,producing the required hydraulic pressure.
When the brake pedal is released
When the brake pedal is released, the master cylinder spring ,diaphragm return spring and pedal return spring cause the output rod,power pistonand input rod return to their original positions ( same as not depressed). The cause the air valve to close , and the vacum valve to open, so that the air in chamber B is drawn into the intake manifold, restoring the brake booster to its non-operating condition.
mbok ya kapan kapan bikin artikel ya bahasa indo to mas mas..
ReplyDeletebingung aku..
hehehehe
ato pasang aja widget translat..
ini apa yang di maksud engine breake itu ya???