Fuel injection valve for internal combustion engines

摘要

The fuel injection valve for internal combustion engines comprises an outer (5) and an inner (7) valve longitudinally movable within it, with both needles interacting with a valve seat (14) and by longitudinal movement controlling the opening of an injection orifice (20,22). A control chamber (27) hydraulically pressurizes the end faces of the outer and inner valve needles. The control chamber is connectable to a valve chamber (51) of a control valve (50) via just a drain restrictor (44), whereby the valve chamber is connectable to a leakage oil chamber.