Patent ID: 6892965

Claim:
In a fuel injection valve for internal combustion engines, having a valve body ( 1 ) in which a bore ( 3 ) is disposed, on whose end toward the combustion chamber a conical valve seat ( 9 ) is embodied in which at least two injection ports ( 11 ) are disposed that connect the bore ( 3 ) to the combustion chamber, and having a valve member ( 5 ), which is guided in the bore ( 3 ) and by imposition of pressure by fuel on a pressure face ( 13 ) embodied on the valve member ( 5 ) is axially movable counter to a closing force aimed at the valve seat ( 9 ) and which has a valve member shaft ( 205 ), oriented toward the valve seat ( 9 ), between which shaft and the wall of the bore ( 3 ) a pressure chamber ( 19 ) that can be filled with fuel is embodied, which valve member ( 5 ), on its end toward the combustion chamber, has a valve member tip ( 7 ) on which a first conical face ( 30 ) and a second conical face ( 32 ) are embodied, the second conical face ( 32 ) adjoining the first conical face ( 30 ) and being located downstream of the first conical face ( 30 ) in terms of fuel flow to the injections ports, and the cone angle (α) of the first conical face ( 30 ) is less, and the cone angle (β) of the second conical face ( 32 ) is greater, than the cone angle (γ) of the valve seat ( 9 ), and having an annular groove ( 35 ), extending all the way around the valve member tip ( 7 ), the first groove edge ( 38 ) of the annular groove ( 35 ) is located in a radial plane to the axis of the valve member ( 5 ) and on the first conical face ( 30 ), and the second groove edge ( 39 ) of the annular groove ( 35 ) is located in a radial plane to the axis of the valve member ( 5 ) and on the second conical face ( 32 ), and the first groove edge ( 38 ) of the annular groove ( 35 ) is embodied as a sealing edge, which in the closing position of the valve member ( 5 ) comes into contact with the valve seat ( 9 ) upstream of the fuel flow to the injection ports ( 11 ), the improvement comprising an additional annular groove ( 42 ) on the second conical face ( 32 ) of the valve member tip ( 7 ), the additional annular groove ( 42 ) at least partly covering the injection ports ( 11 ) both in the closing position and in the open position of the valve member ( 5 ).