| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel injection valve changing the conversion rate of displacement of a valve member with respect to displacement of an actuator by a simple structure and achieving superior energy loss reduction. Ž<P>SOLUTION: This fuel injection valve includes: the actuator 3 displaced by power distribution; a movable member 10 arranged between the valve member and the actuator, formed into a cylindrical shape, and having axial one end abutting on the actuator and the axial other end slidably movably storing the valve member in its inside; a stopper member 30 undisplaceably restricted with respect to displacement of both the valve member and the actuator and having a large diameter portion 31 relatively slidably moved on the inner wall of the movable member and larger than the outside diameter D0 of the valve member; an oil-tight chamber 70 composed of the end of the large diameter portion on the side of the valve member, the inner wall of the movable member, and the valve member; and a step piston 60 arranged at the end of the large diameter portion, formed into a columnar shape slidably movable in an axial direction in the large diameter portion, and having a shaft end portion having an outside diameter smaller than that of the valve member and abutting on the valve element during a predetermined lift H1 of the valve member. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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