Patent ID: 6170757
Filing Date: 2001-01-09
Classification: F02M

Abstract:
A fuel injection valve for internal combustion engines, comprising a valve member (20) that is displaceable axially outward counter to a restoring force in a bore (13) of a valve body and that on an end toward the combustion chamber has a closing head (23), said closing head (23) protrudes from the bore (13) and forms a valve closing member and on a side of the valve closing head toward the valve body (10) has a valve sealing face, with which the valve closing head cooperates with a valve seat face, said valve seat face is disposed on a face end toward the combustion chamber of the valve body, at least one injection opening on the closing head, said at least one injection opening originating at a pressure chamber with an outlet opening being covered, in the closing position of the valve member, by the valve body and being uncovered upon an outward-oriented opening stroke, a two-stage hydraulic stroke stop, which limits the opening stroke of the valve member and is embodied as a hydraulic damping chamber with a relief line, the relief line is made to communicate with the damping chamber via at least two recesses (17, 18) on the valve member, said recesses are opened in succession during an opening stroke motion of the valve member, and at least one of the recesses is made to communicate with a low-pressure chamber via a relief conduit (82) that contains a valve, and the damping chamber is provided in an intermediate disk (72) fastened between the valve body (10) and a valve retaining (42) body and is defined on an axial end opposite an end face of the valve body (10) by a piston (60), the piston is secured to the valve member and is guided slidingly displaceably and sealingly by an outer circumference along a wall of the damping chamber, said piston (60) includes:a piston element (61) which has a bearing face and which rests on a curved contact face formed on the valve member;a retaining element for fixing the piston element (61) to the valve member (20); andan elastic element disposed between the piston element and the retaining element.