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2. Vacuum servo - Wikipedia

   en.wikipedia.org/wiki/Vacuum_servo

   In the US it is commonly called a brake booster. A vacuum servo, also known as a power booster or power brake unit, uses a vacuum, usually supplied by the engine, to multiply the driver's pedal effort and apply that effort to the master cylinder .

3. Power brakes - Wikipedia

   en.wikipedia.org/wiki/Power_brakes

   Vacuum boosters provide brake assist for the driver by multiplying the force out of the booster creating more than the force that was used to push on the brake pedal. 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 ...

4. Automobile accessory power - Wikipedia

   en.wikipedia.org/wiki/Automobile_accessory_power

   The most ubiquitous vacuum-powered accessory is the booster for the power brake system. The vacuum is only an assist and the brakes can still function, requiring greater force, if the booster vacuum is used up. Many older vehicles used vacuum-powered windshield wipers. Loss of manifold vacuum when the engine was working hard, or at wide open ...

5. 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.

6. Vacuum pump - Wikipedia

   en.wikipedia.org/wiki/Vacuum_pump

   In the field of oil regeneration and re-refining, vacuum pumps create a low vacuum for oil dehydration and a high vacuum for oil purification. [44] A vacuum may be used to power, or provide assistance to mechanical devices. In hybrid and diesel engine motor vehicles, a pump fitted on the engine (usually on the camshaft) is used to produce a vacuum.

7. Vacuum brake - Wikipedia

   en.wikipedia.org/wiki/Vacuum_brake

   Vacuum brake cylinder in running position: the vacuum is the same above and below the piston Air at atmospheric pressure from the train pipe is admitted below the piston, which is forced up. In its simplest form, the automatic vacuum brake consists of a continuous pipe—the train pipe—running throughout the length of the train.