| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve improved in uniformity in the circumferential direction, of swirl flow.SOLUTION: In the fuel injection valve including a valve element 3 slidably disposed, a nozzle body 2 provided with a valve seat surface 10 on which the valve element 3 is seated in closing the valve, and having an opening portion at its downstream side, a swirling passage 21 communicated with the opening portion of the nozzle body 2 and disposed at the downstream side, a swirling chamber 22 formed at the downstream side with respect to the swirling passage 21, having a cylindrical inner side face, and swirling the fuel inside to apply swirling force, and a fuel injection hole 23 cylindrically formed on a bottom portion of the swirling chamber 22 and injecting the fuel to the external, the swirling chamber 22 has an inner wall surface composed of a spiral curved line, and the swirling chamber 22 and the fuel injection hole 23 are formed so that the center of a reference circle 28 of the spiral curved line and the center of the fuel injection hole 23 coincide with each other. |
