| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection nozzle controlling penetration force of fuel from a viewpoint different from former nozzles. SOLUTION: In the fuel injection nozzle 1 for an internal combustion engine provided with a nozzle body 50 including a first injection hole 30 and a second injection hole 40 for injecting fuel, and an outside needle 10 and an inside needle 20 movably arranged in the nozzle body 50 and opening and closing the first injection hole 30 and the second injection hole 40 respectively, opening the first injection hole 30 by the outside needle 10 when an operating range of the internal combustion engine is in a light load zone, and opening the first injection hole 30 and the second injection hole 40 by the outside needle 10 and the inside needle 20 respectively when the operating range of the internal combustion engine is in a middle and heavy load zone, the first injection hole 30 includes a flow-in port 31 and a flow-out port 32, the second injection hole 40 includes a flow-in port 41 and a flow-out port 42, and opening area of the flow-in port 31 is formed larger than opening area of the flow-out port 32. COPYRIGHT: (C)2009,JPO&INPIT
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