| 摘要 |
PROBLEM TO BE SOLVED: To atomize fuel, and to stabilize the injection direction by constituting nozzle holes of a nozzle plate out of equal diameter hole parts and expanded diameter hole parts. SOLUTION: The nozzle plate 15 is positioned and installed on the tip side of a valve seat member in a valve casing of a fuel injection valve. The respective nozzle holes 16 and 17 are composed of the equal diameter hole parts 16A and 17A extended in a straight line shape with an equal hole diameter (d) and the expanded diameter hole parts 16B and 17B formed by expanding a diameter in a tapered shape. Thus, when injecting the fuel, an injection flow rate and the injection direction of the fuel are determined by the equal diameter hole parts 16A and 17A, and its jet is expanded to a specific area by the expanded diameter hole parts 16B and 17B. Thus, a fuel atomized state is held, while stabilizing directionality of injection fuel. COPYRIGHT: (C)2008,JPO&INPIT
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