| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection nozzle securing a high response applied to fuel injection, miniaturizing the size, simplifying the structure, and reducing the cost. SOLUTION: In this fuel injection nozzle 11, a pressure control chamber 16 and a control valve chamber 35 are communicated with each other via a pressure control passage 45. The fuel discharge from the pressure control chamber 16 to a low pressure region side (lower chamber 29B) is controlled by the operation of a control valve 36 stored in the control valve chamber 35 to open/ close a needle valve 13. A boundary member storage chamber 46 reciprocatively and slidably storing a boundary member 47 is provided on the way to the pressure control passage 45. The boundary member 47 reciprocates and slidingly moves in the boundary member storage chamber 46 based on the operation of the control valve 36. The movement increases/decreases the volume in the side of the pressure control chamber 16 in the boundary member storage chamber 46. The increase/decrease of the volume improves the increase/decrease response of the internal pressure of the pressure control chamber 16. COPYRIGHT: (C)2004,JPO
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