Patent ID: 7077340
Filing Date: 2006-07-18
Classification: F02M

Abstract:
1. In a fuel injection valve for internal combustion engines with a valve body ( 1 ) that contains a bore ( 3 ), which is delimited at its end oriented toward the combustion chamber by a valve seat ( 9 ) and whose end region oriented toward the combustion chamber has at least one injection opening ( 11 ), and with a piston-shaped valve needle ( 5 ), which is contained in the bore ( 3 ) in a longitudinally sliding fashion and has an essentially conical valve sealing surface ( 7 ) at its end oriented toward the combustion chamber, by means of which the valve needle ( 5 ) cooperates with the valve seat ( 9 ) so that when the valve needle ( 5 ) is resting against the valve seat ( 9 ), the at least one injection opening ( 11 ) is closed, and when the valve needle ( 5 ) is lifted away from the valve seat ( 9 ), fuel flows between the valve seat ( 9 ) and the valve sealing surface ( 7 ), then through the injection openings ( 11 ), the improvement wherein the valve seat ( 9 ) has a first conical partial surface ( 109 ) and a second conical partial surface ( 209 ), and wherein the second conical partial surface ( 209 ) is disposed downstream of and is raised in relation to the first conical partial surface ( 109 ), wherein the second conical partial surface ( 209 ) has the same cone angle as the first conical partial surface ( 109 ).