Patent ID: 6378502
Filing Date: 2002-04-30
Classification: F02M

Abstract:
A fuel injection valve for a high-pressure injection of fuel from a central high-pressure line (6) into combustion chambers of an internal combustion engine, including an injection valve (1) with a valve seat (2), a valve ball (3), and a guide piece (4) that guides the valve ball (3), which guide piece presses the valve ball (3) against the valve seat (2) in order to close the valve and, in order to open the valve, subjects the valve ball (3) to an initial stress of a spring (5), and in the open state, permits the valve ball (3) to be lifted up from the valve seat (2) by means of a high-pressure jet which is supplied via an outlet throttle bore (8) by a control chamber (7) that communicates with a central high-pressure line (6), the improvement comprising a diffuser (9) disposed between the valve seat (2) and the outlet throttle bore (8), said outlet throttle bore (8), said diffuser (9), and said valve seat (2) having the approximate shape of a steep-walled funnel with a right-angled to acute-angled cone angle (&agr;).