| 摘要 |
PROBLEM TO BE SOLVED: To atomize dead fuel.SOLUTION: A fuel injection valve includes a needle valve having a seat part on the front end side, a nozzle body which has a seat surface where the seat part is seated, and in which a swirl stabilizing chamber is provided at the downstream side of the seat surface and an injection hole is formed opening into the swirl stabilizing chamber, and a needle guide which is arranged in the nozzle body, in the outer periphery of which a swirl groove is provided for swirling fuel introduced into the swirl stabilizing chamber, and inside which the needle valve is supported in a reciprocative manner. Between the needle valve and the needle guide, a spiral groove is formed which has a flow path area larger than the flow path area of the swirl groove. |
