Patent ID: 6105879
Filing Date: 2000-08-22
Classification: F02M

Abstract:
A fuel injection valve for internal combustion engines, comprising a valve member (5) that is axially displaceable outward counter to a restoring force in a bore (3) of a valve body (1) and that on an end toward the combustion chamber has a closing head (7), forming a valve closing member, that protrudes out of the bore (3), the closing head having a valve sealing face (9), on a side toward the valve body (1), with which the valve sealing face cooperates with a valve seat face (11) disposed on the face end toward the combustion chamber of the valve body (1), at least one injection opening (21), beginning at a pressure chamber (13), on the closing head (7), whose outlet opening (23) is covered, in the closing position of the valve member (5), by the valve body (1) and uncovered upon the outward-oriented opening stroke, and having a two-stage hydraulic stroke stop which limits the opening stroke motion of the valve member (5) and is embodied as a hydraulic damping chamber (39) with an operable relief line, wherein the relief line communicates with the damping chamber (39) via at least two recesses on the valve member (5) which are operable in succession during the opening stroke motion of the valve member (5), at least one of the recesses communicates with a low-pressure chamber, via a relief conduit (63) that includes a valve (65).