VEHICLE ELECTRO-HYDRAULIC BRAKING CIRCUIT

摘要

When an element of the electro-hydraulic braking circuit malfunctions, a master cylinder (1) can ensure braking of the vehicle, wherefore a brake actuation simulator (8) is disconnected from the master cylinder (2) by means of a ring-type joint (22) following compression of said joint between a groove (16) of a secondary piston (11) and a bore (24) of the master cylinder. According to the invention, a pressure-releasing duct (32) is embodied inside the secondary piston in order to prevent said joint from being extruded from the groove during releasing of the brake pressure (or releasing of the brake pedal) as a result of abrupt braking. The inventive release duct (32) allows excess pressure to be evacuated from the inside of the simulator chamber (30) to the primary chamber (10) of the master cylinder.