| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection nozzle whose nozzle body is easy to be machined, and which reduces discharging of harmful components (black smoke and hydrocarbon, etc.), due to fuel leakage. SOLUTION: A second guide part (cylinder hole) 20b slidably supporting a second guide shaft part 28 of a needle 4 is provided at a guide hole 20 made on the nozzle body 3. A seat surface 25 is formed at the lower side of the second guide part 20b and a first injection hole 23 opening to the seat surface 25, and a second injection hole 24 opening to an inside peripheral surface of the second guide part 20b. As for the needle 4, a through-groove 32 is formed inside the second guide part 28, and fuel is supplied to a seat part 29 through the through-groove 32. According to the constitution, since the second guide part 20b is provided at shallower position (axial upper side) than a sack chamber 26 and the inner diameter of the second guide part 20b is made larger than that of the sack chamber 26, the second guide part 20b is easily machined. COPYRIGHT: (C)2003,JPO
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