| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve for atomizing a fuel spray, and improving combustibility of an engine by reducing a collision of fuel in a confluent position becoming a factor of a loss in a fuel flowing speed. SOLUTION: An inner peripheral annular groove 22 is formed on the inner periphery of a first end surface 14 facing a valve seat 7 of a turning body 10, and a turning groove 23 is connected to the inner peripheral annular groove 22 so as to contact from the tangent direction with the outer periphery of the inner peripheral annular groove 22. A seat surface 24 is formed at a first opening angleθ1 on the upstream side of an injection hole 8 of the valve seat 7, and a tapered surface 25 is formed at a second opening angleθ2 on the upstream side of the seat surface 24 of the valve seat 7. An opening diameter A of the tapered surface 25 is constituted larger than an outer diameter B of the inner peripheral annular groove 22, and the second opening angleθ2 of the tapered surface 25 is constituted larger than the first opening angleθ1 of the seat surface 24. COPYRIGHT: (C)2004,JPO
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