Abstract: Using a cycling type fuel injection valve, form a concentrated spray area and a thin spray area, adjust the position of those, and conform the spray to the geometric shape of engine and mounting position of the fuel injection valve so as to reduce the fuel consumption and control the unburnt component in exhaust gas. The fuel injection valve is so constructed to form a step on the injection hole opening of the fuel injection valve, to have two or more edge transition portions of the injection hole opening, resulting from the step, and to cause the line connecting the edge transition portions to form an oblique angle against the wall formed by the step perpendicular to the injection hole center axis and the angled wall.

Abstract: A fuel spray is directed toward an ignition plug. To a L shape fuel injection hole outlet portion of a swirl type fuel injector L shape cut out is provided and the fuel spray is formed with a deflection fuel spray which has a strong swirl component and can inject with much quantity. Accordingly, a reduction in the discharge HC amount and the improvement in the fuel consumption can be attained.

Abstract: In an internal combustion engine, an amount of spray attaching onto an inner wall surface of an intake pipe is reduced by forming two-directional spray of highly atomized fuel. The highly atomized two-directional spray can be obtained by a spray forming means which is constructed by piling a fuel in-plate 13 forming fuel passages, a swirl plate 14 forming fuel passage for adding swirl forces to the fuel, and an injection plate 15 for determining injection directions of the fuel. Further, penetrations of the sprays injected toward two directions are made different from each other.