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2. Vacuum servo - Wikipedia

   en.wikipedia.org/wiki/Vacuum_servo

   Brake booster from a Geo Storm. Brake vacuum servo section. A vacuum servo is a component used on motor vehicles in their braking system, to provide assistance to the driver by decreasing the braking effort. In the US it is commonly called a brake booster.

3. Power brakes - Wikipedia

   en.wikipedia.org/wiki/Power_brakes

   The booster works by pulling the air out of the booster chamber with a pump or other vacuum source (typically the engine's intake manifold [1]), creating a low-pressure system inside. When the driver steps on the brake pedal, the input rod on the booster is pushed in which lets atmospheric pressure into the booster.

4. Hydraulic brake - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_brake

   The vacuum booster or vacuum servo is used in most modern hydraulic brake systems which contain four wheels, the vacuum booster is attached between the master cylinder and the brake pedal and multiplies the braking force applied by the driver.

5. Brake - Wikipedia

   en.wikipedia.org/wiki/Brake

   Brake booster from a Geo Storm. Most modern passenger vehicles, and light vans, use a vacuum assisted brake system that greatly increases the force applied to the vehicle's brakes by its operator. [4] This additional force is supplied by the manifold vacuum generated by air flow being obstructed by the throttle on a running engine. This force ...

6. S-cam - Wikipedia

   en.wikipedia.org/wiki/S-cam

   It consists of a shaft, usually around 4 to 25 inches long, turned at one end by means of an air-powered brake booster and lever with an S-shaped cam at the wheel end. Turning the shaft pushes the brake shoes against the drum, producing friction. The design allows bulky air cylinders to be located outside of the wheel.

7. Brake pad - Wikipedia

   en.wikipedia.org/wiki/Brake_pad

   Unlike a drum brake, a disc brake has no self-servo effect—the braking force is always proportional to the pressure applied on the braking pedal lever. However many disc brake systems have servo assistance ("Brake Booster") to reduce the driver's pedal effort. [citation needed]