UNLIMITED-FLOW PREFILL BRAKE SERVO

摘要

A power braking device including a master cylinder and a pneumatic brake servo, wherein the actuation force of the master cylinder results from a combination of an input force and a servo boosting force. The main hydraulic piston of the master cylinder comprises a hollow cylinder capable of receiving the input force and slidably containing a secondary hydraulic piston receiving part of the boosting force imparted by a movable wall that is slidably mounted on the pneumatic piston of the servo and, in the inoperative position, engages the rigid shell.