Patent ID: 6827297
Filing Date: 2004-12-07
Classification: F02M

Abstract:
A fuel injection valve for internal combustion engines, comprisinga valve body (5) in which a bore (15) is disposed, on the end toward the combustion chamber of which bore a conical valve seat (23) and at least one injection port (25), which connects the bore (15) to the combustion chamber, are disposed, a longitudinally displaceable, pistonlike valve member (7), which is guided in the bore (15) and has a valve member shaft (107), oriented toward the valve seat (23), between which shaft and the wall of the bore (15) a pressure chamber (11) that can be filled with fuel is embodied, and which valve member (7), on its end toward the combustion chamber, has a valve member tip (13) on which a first conical face (30) and a second conical face (32), adjoining the first conical face toward the combustion chamber, cone angle (&agr;) of the first conical face (30) is less, and the cone angle (&bgr;) of the second conical face (32) is greater, than the cone angle (&ggr;) of the valve seat (23), so that an encompassing sealing edge (40) is formed at the transition of the two conical faces (30, 32), which sealing edge, in the closing position of the valve member (7), comes to rest on the valve seat (23) upstream of the injection ports (25) in terms of the fuel flow to the injection ports (25), and an encompassing annular groove (35) is formed on the first conical face (3) of the valve member tip (13).