Glossary “vacuum booster” Definition:
Power bbrake actuating mechanism that uses vacuum on one side of a diaphragm as a power source to amplify braking force.

Glossary “vacuum brake booster” Definition:
Device that uses vacuum to amplify the braking force.

Glossary “vacuum advance control” Definition:
An emissions-control system component that allows vacuum advance only during certain modes of engine operation.

Glossary “vacuum amplifier” Definition:
Term used for venturi vacuum amplifier.

Glossary “vacuum advance” Definition:
The principle of advancing ignition timing by using the vacuum generated by the engine, accomplished through the use of a mechanism attached to the distributor which moves the breaker point or pickup coil plate when it receives vacuum.