FUEL INJECTION VALVE NOZZLE AND METHOD OF ITS CONTROL Russian patent published in 2005 - IPC

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention relates to fuel equipment of internal combustion engines. Proposed valve nozzle for fuel injection, mainly, valve nozzle for fuel injection systems of internal combustion engine, has first coil interacting with first armature and needle connected with first armature with closing for setting into action shutoff element forming, together with contact surface of seat, the place of tight fit, and second coil. First armature is loaded by first return spring acting for closing. Second armature interacts with second coil so that when first coil and second coil are energized, stop element connected with needle thrust against second armature. Method to control valve nozzle for injecting fuel, relates mainly, to valve nozzle for fuel injection system of internal combustion engine provided with first coil interacting with first armature and needle connected with first armature with power closing to set shutoff element into action. Shutoff element, together with contact surface of seat forms tight fitting. Second coil is provided. First armature is loaded by first return spring acting in direction of closing. Second armature interacts with second coil to provide thrusting of stop element against second armature when first coil and second coil connected with needle are energized. Owing to simultaneous energizing of first coil and second coil, needle of valve nozzle is shifted into first open position with provision of first passage area or owing to energizing of first coil only, needle of valve nozzle is shifted into second open position with provision of second passage area.

EFFECT: possibility of changing metered out amount of fuel in time unit depending on rotational frequency of engine shaft, provision of optimization of dynamic of opening and closing of nozzle needle.

11 cl, 2 dwg