In Automobile Vehicles, Brake Boosters are used only on power brakes, not Manual Brakes. The Booster?s Function is to give more Braking Power with minimum pressure on the Brake pedal.If the Booster is not working properly ,you will still have Brakes, but the Brake pedal will be very hard to Push.The Brake Booster is located between the Brake pedal and the Master cylinder .The basic principle of the Brake Booster is pressure differential.
The Brake Booster is made of Five Parts: - Body - Booster piston - Booster Return spring - Reaction valve - Control valve The Body has Two Chambers ?The variable pressure chamber and the constant pressure chamber separated by a diaphragm.
As the driver steps on the brake pedal, atmospheric air is introduced in the variable pressure chamber, producing a pressure differential between the variable and the constant pressure chamber. The force generated by the pressure differential on the plate is transmitted to the push rod via the booster piston which pushes the piston of the brake master cylinder. When the pedal is depressed, All components return to its original positions through the return springs.
The booster's size and whether it has a single or more than one diaphragm depend on the year, make and model of the vehicle. When ordering a new booster, tell the auto parts store or dealer the year, make and model of your vehicle, and they will give you the correct one.
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