Patent ID: 6886760

Claim:
In a fuel injection valve for internal combustion engines, having a valve body ( 1 ) with a bore ( 3 ) that contains a piston-shaped valve member ( 5 ) in a longitudinally movable fashion, which valve member ( 5 ) controls at least one injection opening ( 17 ) disposed at the end of the bore ( 3 ) oriented toward the combustion chamber and is guided in the bore ( 3 ) with a sealing section ( 105 ) remote from the combustion chamber and having an annular collar ( 22 ), which is disposed on the valve member ( 5 ) closer to the combustion chamber than the sealing section ( 105 ) and which has a side ( 37 ) oriented toward the combustion chamber and a side ( 36 ) oriented away from the combustion chamber and which annular collar ( 22 ) divides the space between the valve member ( 5 ) and the bore ( 3 ) into a first pressure chamber ( 9 ), which is oriented away from the combustion chamber and can be filled with fuel, and a second pressure chamber ( 19 ) which is oriented toward the combustion chamber, and having a bore guiding section ( 203 ) of the bore ( 3 ) into which the annular collar ( 22 ) plunges in the closed position of the valve member ( 5 ) and thus separates the two pressure chambers ( 9 , 19 ) with the exception of a throttle cross section and out of which the annular collar ( 22 ) emerges during opening stroke motion of the valve member ( 5 ) and thus connects the pressure chambers ( 9 , 19 ) to each other, the improvement wherein the throttle cross section is at least one throttle conduit ( 40 , 42 ) having an inlet formed in the side ( 36 ) of the annular collar ( 22 ) oriented away from the combustion chamber and an outlet formed in the side ( 37 ) of the annular collar ( 22 ) oriented toward the combustion chamber and which connects the two sides ( 36 , 37 ) of the annular collar ( 22 ) to each other.