| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve having an excellent flow rate dynamic range, a small change in a flow rate characteristic and an atomizing characteristic associated with the change of the atmosphere, and low manufacturing cost, and capable of suppressing atomization splashing. SOLUTION: In the fuel injection valve 1, an injection hole 11c is formed on the outer side in the radial direction of an aperture of a valve seat, and a cavity 17 for making the aperture communicate with the injection hole 11c is formed. The cavity 17 has a cavity body 17a expanding in the radial direction, and a plurality of first swirl chambers 17b projecting in the radial direction with a space in the circumferential direction from the cavity body 17a to turn the fuel in the same turning direction from the turning direction of the turning flow 16a. The fuel flowing into the first swirl chambers 17b is injected from an outlet of the injection hole 11c while turning on an inner wall surface of the injection hole 11c. COPYRIGHT: (C)2009,JPO&INPIT
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