| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve capable of preventing change of lift quantity even in the case wherein a valve body or the like is influenced by surrounding temperature due to the heat, in regard to a fuel injection valve structured to drive a valve member of an outer opening valve structure with a driving member to be extended/shrunken by electrifying. SOLUTION: The fuel injection valve 10 is provided with the valve body 12 (nozzle bodies 25 and 26 or the like in detail) having a valve seat 13, a needle 16 to be inserted inside/outside the nozzle body in the axial direction and to be seated on and separated from the valve seat 13, and a piezoelectric vibrator 17 to be extended and shrunken by electrifying. The fuel injection valve 10 is opened by extending the piezoelectric vibrator 17 to separate the needle 16 outside from the seat. Stopper members 71 and 76 are provided to abut on the valve body 12 to regulate lift quantity of the needle 16 separating from the valve seat 13. Abutment parts of the stopper members 71 and 76 on the valve body 12 are set at positions for moving the stopper members 71 and 76 toward the valve seat side with the valve body 12 when the valve body 12 is swollen (a second stage difference part 12a and a lower end part 72a). COPYRIGHT: (C)2006,JPO&NCIPI
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