PENETRATION MASTER CYLINDER WITH REDUCED BACKLASH AND APPLICATION THEREOF

摘要

The invention relates to a penetration-type master cylinder in which a cup (3) is mounted in a groove (11) of the master cylinder and acts on the wall (20) of a piston (2) in a sealed manner. Said wall (20) is pierced with primary refill openings (51). According to the invention, the wall (20) of the piston (2) is pierced with secondary refill openings (52) which are smaller than the primary refill openings (51) and which are farther away from the heel (33) of the cup (3). In this way, excellent communication is provided between the master cylinder and the low-pressure brake fluid tank and dynamic backlash is reduced.