| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve, capable of reducing a minimum injection quantity while improving the responsiveness in opening and closing thereof. SOLUTION: The fuel injection valve includes: an internal housing 107; an outer housing 110 covering the outer circumference of the inner housing with a space; a nozzle pipe 103 attached to on end of the outer housing concentrically to the outer housing; an electromagnetic oil fixed to the inside of the inner housing and a magnetic core 111, 114 surrounding a part of the magnetic coil; a valve shaft 101 including a movable element 112 provided at one end thereof to face an end portion of the magnetic core through a magnetic attraction clearance, and a valve element 101a provided at the other end to open and close a fuel injection port formed at a leading end of the nozzle pipe, the valve shaft being disposed to be movable forward and backward relative to the magnetic ore within the nozzle pipe; and a bellows 104 inserted onto the valve shaft while sealing one end thereof to the valve shaft and the other end to the inner housing. Fuel is supplied to the fuel injection port through a void formed between the inner housing and the outer housing and a gap between the nozzle pipe and the bellows. COPYRIGHT: (C)2011,JPO&INPIT
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