Fuel injection valve for internal combustion engine, has non-return valve provided for locking fuel supply to pressure area against supply direction in closing phase of valve needle, such that pressure increase of fuel takes place

摘要

The valve has a nozzle body (2), and a valve needle (5) controlled by a control valve and guided in the nozzle body in an axially displaceable manner, where the valve needle comprises two guide sections (13, 14). A fuel channel is formed in an inner side of the valve needle and provided for supplying the fuel to a valve needle pressure area (15). A non-return valve (50) is provided for locking the fuel supply to the pressure area against a supply direction in a closing phase of the valve needle, such that the pressure increase of the fuel takes place.