| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection nozzle atomizing injected fuel without enlarging a size of a needle and suppressing drop in penetration accompanying atomization. SOLUTION: The fuel injection nozzle 4 is provided with a first valve seat part 30 on an inner wall surface thereof, a second valve seat part 31 positioned on fuel downstream side of the first valve seat part 30, a nozzle body 5 having a plurality of injection hole groups composed of a plurality of injection holes 11, 12 penetrating from an inner wall surface toward outer wall surface formed thereon, and a needle 60 including a first and a second abutment part 61, 62 reciprocatingly and slidably supported by the nozzle body 5 and seated on and separated from the first and the second valve seat part 30, 31 respectively. Inlet parts 13, 14 of the plurality of injection holes are formed closely in series along an axial direction of the nozzle body 5 between the first and the second valve seat part 30, 31. Opening shape thereof is a circle or a polygon aspect ratio of which is greater than 1. COPYRIGHT: (C)2006,JPO&NCIPI
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