Vacuum

In everyday usage, vacuum is a volume of space that is essentially empty of matter, such that its pressure is much less than atmospheric air pressure. The word comes from the Latin term for empty.

Automatic engine ignition timing adjustment using the inlet manifold pressure to sense engine load. The pressure, as a vacuum, is applied to a diaphragm assembly to move the base plate in the ignition distributor.

A brake booster system that uses inlet manifold vacuum in a brake servo unit to increase the driver's braking effort. The vacuum can also be provided from a vacuum pump on diesel engines.

An instrument for measuring pressure (below atmospheric pressure) of a fluid or a gas.

A motor that is operated by a vacuum such as to move or drive something.

See Vacuum Hoses

Test equipment that can be used to apply a vacuum.

A device that either controls vacuum so a set level or one that uses vacuum to regulate another operation.

Vane Air Flow Sensor.