Gearbox e.g. semi-automatic gearbox, for motor vehicle, has filling chamber assuring passage speed of vehicle such that electromagnetic valve simultaneously supplies hydraulic pressure to pressure chambers

摘要

The gearbox (1) has an electrohydraulic actuator (2) for actuating a parking brake lock. The actuator includes a double acting cylinder (4) equipped with two pressure chambers (5, 6, 15) and a movable piston (7) moved in translation along a main axis (8), where the displacement of a rod (9) of the piston in direction (10) leads to interlocking of a controller (3) of a parking brake lock by the rod. A filling chamber assures passage speed of a vehicle such that an electromagnetic valve i.e. binary electromagnetic valve, simultaneously supplies hydraulic pressure to the pressure chambers.