| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve with a reduced dead volume (passage space part 9) between a needle valve 3 and the injection valve 5 to prevent fuel from remaining, thereby suppressing the generation of carbon deposit in the vicinity of an injection port 5 and keeping smooth fuel flow in a fuel passage 7 when the needle valve 3 opens. SOLUTION: The fuel injection valve has the needle valve 3 seated on a seat part 6 in the upstream of the injection port 5 to open or close the injection port 5, and an additional member 11 to fill the passage space part 9 is placed in the passage space part 9 between the seat part 6 and the injection port 5 at the end part of the needle valve 3 so as to reduce the passage space part 9 (dead volume) particularly during valve closing by attaching the additional member 11 at the end part of the needle valve 3 and also reduce the capacity change (increase) due to the additional member 11 during valve opening as well to eliminate the effect on the fuel flow. COPYRIGHT: (C)2004,JPO
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