Vacuum Brake Booster: Description and Operation: Overview

Brake Booster

OVERVIEW
Power assistance for the braking system is provided by a vacuum operated, non-active brake booster. The vacuum required for brake booster operation is created by an engine driven vacuum pump.
Rigid plastic piping connects the vacuum pump to the brake booster. Vehicles fitted with the stop/start system incorporate a brake vacuum sensor in the piping. A non return valve, installed on the front of the brake booster or in the brake vacuum sensor, maintains the vacuum necessary for brake booster operation.