VEHICLE HYDRAULIC BRAKE BOOSTER SYSTEM AND METHOD

摘要

A vehicle brake booster system includes a reservoir, a pump, and a brake booster. The brake booster includes an input member adapted to receive a manual braking input force and an output member adapted to apply a braking output force to a master cylinder. A supply line couples the pump to the brake booster, and a return line couples an outlet of the brake booster to the reservoir. A flow of hydraulic fluid pumped to the brake booster provides a boost factor by which the braking output force exceeds the braking input force. The brake booster is hydraulically lockable by a first valve in the supply line and a second valve in the return line such that when the first and second valves are closed, a quantity of hydraulic fluid is trapped within the brake booster to maintain operation of the brake booster without continued operation of the pump.

主权项

1. A vehicle brake booster system comprising:
a reservoir; a pump operable to drive a hydraulic fluid from the reservoir; a brake booster including an input member adapted to receive a manual braking input force from a vehicle operator and an output member adapted to apply a braking output force to a master cylinder; a supply line coupling an outlet of the pump to an inlet of the brake booster; and a return line coupling an outlet of the brake booster to the reservoir, wherein a flow of hydraulic fluid pumped to the brake booster by the pump provides a boost factor by which the braking output force exceeds the braking input force, and wherein the brake booster is hydraulically lockable by a first valve in the supply line and a second valve in the return line such that when the first and second valves are closed, a quantity of hydraulic fluid is trapped within the brake booster to maintain operation of the brake booster without continued operation of the pump.