Patent ID: 7059688

Claim:
Electropneumatic control valve for a pneumatic brake system of a vehicle having a relay valve housing in which an axially adjustable control piston is arranged for actuating a valve seat arrangement which switches the compressed-air flow between at least one exterior brake line connection, a supply pressure connection as well as a bleeder connection, the control piston being axially guided via a coaxial guiding arrangement and being capable of being acted upon by a control pressure by way of at least one electromagnetic pilot valve for the axial adjustment, which pilot valve is accommodated in a pilot valve housing connected with the relay valve housing, wherein the guiding arrangement of the control piston comprises a separate guiding sleeve which is stationarily fastened to the pilot valve housing and which is provided with an upper guiding section which, for the axial guidance, corresponds with a passage bore in the control piston, and which, in addition, has a lower tube section of a smaller outside diameter adjoining the upper guiding section in order to guide the outgoing air flowing through an integrated axial bleeder duct over the area of the valve seat arrangement directly to the bleeder connection.