Brake pressure control valve and a method for its assembly

摘要

A brake pressure control valve for a vehicular brake system comprises a stepped piston having a large-diameter portion guided in a bore of a threaded housing plug and a small-diameter portion guided in a bore formed in a housing for the control valve. At the end of the piston adjacent an inlet, an axial channel has a valve seat in a cooperative relation with a closure member. The piston is displaceable from its inactive position in a valve closing direction against the force of a valve spring bearing against a fixed stop. The fixed stop is fastened to the threaded plug to rovide a predetermined preload of the valve spring. With the aid of the threaded plug, the valve closure travel can be adjusted very precisely. The pressure control valve is formed by two constructional units each of which can be preassembled, thereby providing ease of assembly, mounting and replacement.