Fuel injection valve for internal combustion engines

A fuel injection valve for internal combustion engines, said valve comprising a valve body (1), having a bore (5) therein, a pistonlike valve member (7) disposed axially movably counter to a closing force in said bore, said valve member (7) being guided in a portion remote from the combustion chamber in said bore (5), while toward the combustion chamber through a cross-sectional reduction it changes into a valve member shaft (7′) which protrudes into an annular chamber, embodied as a pressure chamber (17), between said bore (5) and valve member shaft (7′), a valve member tip (30), embodied on the end toward the combustion chamber of said valve member shaft (7′), which tip is substantially conical and whose outer diameter decreases away from the valve member shaft (7′), a valve seat (11) embodied on the end toward the combustion chamber of said bore (5) and having a substantially conical face, on which a jacket face of said valve member tip (30), as a valve sealing face (9), comes to rest upon motion of the valve member (7) in the direction of the closing force and thus seals off at least one injection opening (13) from the pressure chamber (17), an encompassing annular groove disposed between the transition from said valve member shaft (7′) to said valve member tip (30) and said valve sealing face (9), whereby the part of said valve member tip (30) bearing said valve sealing face (9) is embodied resiliently and is elastically deformable perpendicular to the conical face of the valve seat (11).