| 摘要 |
A brake booster connected to a dual circuit vehicle brake system includes a housing within which there is located a booster piston and an auxiliary piston interconnected so that the displacement of the auxiliary piston in the direction of the booster piston is communicated to the booster piston. This displacement occurs when the pressure in a reservoir, to which the auxiliary piston is exposed, falls below a predetermined level. The displacement communicated to the booster piston in turn displaces the booster piston to a predetermined position which is located relative to a brake pedal push rod so that the brake pedal push rod can execute an idle stroke. |
