NON-RETURN VALVE AND HYDRAULIC ANTI-SLIP VEHICLE BRAKING SYSTEM WITH A NON-RETURN VALVE

摘要

The present invention relates to an automotive vehicle brake system with wheel slip control which is provided with a so-called filling valve, i.e., a non-return valve, between a secondary and a primary circuit. Initially, both circuits are evacuated for filling the brake system with pressure fluid, and evacuation of the secondary circuit is effected by way of the non-return valve that opens. The present invention suggests providing this valve with a blocking device which becomes effective when the brake is actuated for the first time, thereby causing pressure build-up in the primary circuit. The blocking device retains the valve closure member on the valve seat member, with the result that the non-return valve remains closed in the normal operation of the brake system. It is prevented by this provision that vacuum develops in the secondary circuit during a braking operation.