| 摘要 |
PROBLEM TO BE SOLVED: To atomize fuel spray, facilitate processing for forming an injection hole, heighten diffusibility of spray, and improve combustion efficiency in a fuel injection nozzle.SOLUTION: The fuel injection nozzle comprises: a nozzle body 4 having an injection hole 2 injecting fuel and a fuel passage 3 introducing fuel to the injection hole 2; and a needle 5 that is a shaft-like member inserted in the nozzle body 4, and constitutes a valve section 7 for opening/closing the fuel passage 3 by reciprocating movement to the nozzle body 4 in an axial direction together with the nozzle body 4. The fuel passage 3 has: a fuel storage section 8 for forming a space holding the fuel around the needle 5 together with an outer periphery of the needle 5; a fuel supply passage section 21 provided on an upper stream side than the fuel storage section 8 and introducing the fuel in an insertion direction of the needle 5 to the nozzle body 4; and a direction conversion passage section 22 provided between the fuel storage section 8 and the fuel supply passage section 21, and communicated with the fuel storage section 8 in a direction displaced from a radial direction of the needle 5 when seen in the axial direction of the needle 5. |
