BRAKE BOOSTER

A brake booster is an enhanced master cylinder setup used to reduce the amount of pedal pressure needed for braking. Brake boosters come in either a single diaphragm or tandem diaphragm (which is usually used in bigger vehicles and trucks). Apart from this additional booster setup, the braking system is a normal Hydraulic brake system.

History:
Albert Dewandre (Liege, Belgium), an engineer, was the inventor of servo-brake or brake booster system “Dewandre” in 1927. It is a brake boosting system that uses the depression caused by the suction in the intake manifold of an internal combustion engine to decrease the pressure on the brake pedal. The benifit of the Dewandre system is twofold: a softer push on the brake pedal, but also a notably shorter braking distance. His invention was manufactured and sold through the Robert Bosch Company.

Location:
Open the hood of the car to find the brake booster. It's the round, black cannister located at the back of the engine compartment on the driver's side of the car.

Functioning of Brake Booster :
As you press the brake pedal, the pedal linkage causes a shaft to move forward as a response to your foot, and the shaft goes forward, it interacts with the brake booster and master cylinder. The brake booster contains a diaphragm that separates its interior into two parts, with both in a partial vacuum. As the brake pedal is depressed, it resulits the inside valve to open, which in turn allows air into one side of the booster. This difference in pressure on one side helps to push the piston inside the brake master cylinder forward in response to the brake pedal, which in turn slows down and stops your vehicle.A brake booster raises the force the brake pedal exerts on the brake master cylinder by utilizing engine vacuum and pressure.

Why Brake Booster Is Necessary?
In the old days, vehicles generally used drum brakes, which usually provide some of their own power assistance. Once disc brakes started to become more common, the lack of braking assistance started to become quite markaable. Brake systems work at rather high fluid pressures, and without the assistance of the brake booster, would result in hard, and difficult to use brake pedal. This would mean that proper stopping ability would be propotional to the personal strength, which erodes much of the accessibility that the modern automobile enjoys, and poses a safety concern to everyone on the road, and it is harmful for the daily driving persons, since it needs lot of energy.
Without a brake booster, even the simple act of slowing the vehicle would require significantly high energy, effort and incur greater amounts of fatigue. Even though, the brake booster does not brake your vehicle directley for you, it offers a helping hand in the process.