Abstract: A fuel injection valve having a valve body (5), in which a pistonlike valve member (7) is guided longitudinally displaceably in a bore (15) embodied as a blind bore. A conical valve seat (23) and at least one injection port (25) are embodied on the bottom face of the bore (15), and the injection port connects a pressure chamber (11), formed between the portion (107) of the valve member (7) toward the combustion chamber and the bore (15), with the combustion chamber. On the end toward the combustion chamber of the valve member (7), there is a valve member tip (13), on which a first conical face (30), adjacent to the valve member (7), and a second conical face (32), disposed on the combustion chamber side of the first conical face, are embodied.

Abstract: A fuel injection nozzle for self-igniting internal combustion engines, having a nozzle body in which a conical valve seat face is formed on the injection end of a bore, from which face the injection ports extend, and having a valve needle, opening counter to a closing force counter to the flow direction of the fuel, which needle is guided displaceably in the entrance region of the bore remote from the injection end and which on its side toward the valve seat face has a closing cone, which cooperates with the valve seat face, is characterized in that the injection port cross section toward the combustion chamber of the engine, after initially narrowing, widens again.

Abstract: A fuel injection valve having a valve body (5), in which a pistonlike valve member (7) is guided longitudinally displaceably in a bore (15) embodied as a blind bore. A conical valve seat (23) and at least one injection port (25) are embodied on the bottom face of the bore (15), and the injection port connects a pressure chamber (11), formed between the portion (107) of the valve member (7) toward the combustion chamber and the bore (15), with the combustion chamber. On the end toward the combustion chamber of the valve member (7), there is a valve member tip (13), on which a first conical face (30), adjacent to the valve member (7), and a second conical face (32), disposed on the combustion chamber side of the first conical face, are embodied.

Abstract: A fuel injection nozzle for self-igniting internal combustion engines, having a nozzle body in which a conical valve seat face is formed on the injection end of a bore, from which face the injection ports extend, and having a valve needle, opening counter to a closing force counter to the flow direction of the fuel, which needle is guided displaceably in the entrance region of the bore remote from the injection end and which on its side toward the valve seat face has a closing cone, which cooperates with the valve seat face, is characterized in that the injection port cross section toward the combustion chamber of the engine, after initially narrowing, widens again.