FUEL INJECTION VALVE FOR INTERNAL COMBUSTION ENGINES

摘要

The invention relates to a fuel injection valve for internal combustion engines, comprising a housing (1) in which an outer valve needle (20) and an inner valve needle (22), which is guided in said outer valve needle, are arranged in a bore hole (16). The outer valve needle (20) controls an outer row of injection openings (130) by means of a longitudinal movement and the inner valve needle (22) likewise controls an inner row of injection openings (230) by means of a longitudinal movement, fuel being supplied to said rows of injection openings (130; 230) with an injection pressure by means of a high pressure channel formed in the housing (1). A control pressure chamber (52) is embodied in the housing (1) and can be connected to the high pressure channel (10). A closing force is at least indirectly exerted on the inner valve needle (22) by means of the pressure of said control pressure chamber. The high pressure channel (10) is connected to a control chamber (50), and a closing force is at least indirectly exerted on the outer valve needle (20) by means of the pressure of said control chamber. The control chamber (50) is connected to the control pressure chamber (52). A control valve (58) is arranged in the housing (1), by which means the control chamber (50) can be connected to a leak oil chamber (78).