| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection nozzle for suppressing the flow-out of fuel into a combustion chamber when a valve is closed at a low temperature while actualizing stable fuel injection. SOLUTION: The fuel injection nozzle comprises a nozzle body 2 having a fuel reservoir chamber 4 and an injection hole 5 at the front end, and a needle 3 for reciprocating inside the nozzle body 2. The needle 3 consists of an inside needle 6 formed of a material having a linear expansion coefficientα1, and an outside needle 7 formed of a material having a linear expansion coefficientα2 greater than the linear expansion coefficientα1 and arranged on the outer periphery side of the inside needle 6. The inside needle 6 and the outside needle 7 are joined to each other at their base ends into one unit. COPYRIGHT: (C)2009,JPO&INPIT
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