Fuel injection valve with improved tightness at the sealing seat of a pressure-balanced control valve

摘要

A fuel injection valve for internal combustion engines comprises a valve needle (4), which, due to its longitudinal movement of the opening of at least one injection opening (5) controls, one at a high pressure side (14) connected control chamber (17), the pressure of at least indirectly on the valve needle (4) acts, and a control valve (23) with a valve seat (26), the radially between a to the control chamber (17) connected on the high-pressure valve chamber (22) and a low-pressure valve chamber (24) is provided, and with a movably guided valve sleeve (25), the high-pressure side valve chamber (22) and radially bounded with the valve seat (26) which cooperates. According to the invention, the valve sleeve (25) a radially into the high-pressure side valve chamber (22) projecting annular projection (29), whose the valve seat (26) facing away from the shoulder surface (29a) a with the valve seat (26) forms sealing surface.