Patent ID: 9574535
Date: 2017-02-21
CPC Classifications: B05B,F02M

Claim:
1. A fuel injection valve comprising: a needle valve including a seat portion on a tip side of the needle valve; a nozzle body including a seat surface on which the seat portion is placed, the nozzle body including a swirl stabilization chamber on a downstream side of the seat surface, the nozzle body including an injection hole that has an inlet in the swirl stabilization chamber; a swirl flow generating portion having swirl grooves configured to add a swirling component to a fuel flow introduced into the swirl stabilization chamber; and a fuel collision portion provided in a tip portion of the needle valve, the fuel collision portion being configured such that, in a state where the needle valve is opened, the fuel collision portion intersects with a virtual surface extended toward the injection hole from the seat surface included in the nozzle body, the fuel collision portion including a spiral groove on its external wall, a swirl direction of the spiral groove relative to the axial center of the needle valve being the same direction as a swirl direction of the swirl grooves relative to the axial center of the needle valve.