BRAKE BOOSTER INTRODUCTION In Automobile Vehicles Brake Boosters

BRAKE BOOSTER

INTRODUCTION Ø In Automobile Vehicles, Brake Boosters are used only on power brakes, not Manual Brakes. Ø The Booster’s Function is to give more Braking Power with minimum pressure on the Brake pedal. Ø If the Booster is not working properly , you will still have Brakes, but the Brake pedal will be very hard to Push. Ø The Brake Booster is located between the Brake pedal and the Master cylinder. Ø The basic principle of the Brake Booster is pressure differential.

Construction Ø The Brake Booster is made of Five Parts: - Body - Booster piston - Booster Return spring - Reaction valve - Control valve Ø The Body has Two Chambers —The variable pressure chamber and the constant pressure chamber separated by a diaphragm.

WORKING Ø 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. Ø 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. Ø When the pedal is depressed, All components return to its original positions through the return springs.

TYPES Ø 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. Ø 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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