Patent ID: 7347389

Claim:
A fuel injection valve for internal combustion engines, the valve comprising a valve body ( 1 ) having a bore ( 3 ) defined on its end toward the combustion chamber of the engine by a conical valve seat ( 12 ), a pistonlike valve needle ( 5 ) disposed longitudinally displaceably in the bore ( 3 ), the valve needle ( 5 ) having a valve sealing face ( 10 ) that includes two conical faces ( 20 ; 22 ), on its end toward the combustion chamber the second conical face ( 22 ) disposed on the combustion chamber side of the first conical face ( 20 ), an annular groove ( 25 ) extending between the conical faces ( 20 ; 22 ), the end of the annular groove ( 25 ) facing away from the combustion chamber acting as a sealing edge upon contact of the valve sealing face ( 10 ) with the valve seat ( 12 ), and a plurality of recesses ( 35 ) embodied on the valve sealing face ( 10 ), the recesses ( 35 ) hydraulically connecting the annular groove ( 25 ) with a portion of the second conical face ( 22 ) located on the combustion chamber side of the annular groove ( 25 ), wherein the recesses ( 35 ) are embodied as a plurality of elongated grooves ( 38 ), and the elongated grooves ( 38 ) extend beyond the injection openings ( 14 ).