Fuel Injection Valve

A fuel injection valve comprising:

• a valve seat;
• a valve element that cooperates with the valve seat to open or close a fuel passage;
• and
• a plurality of swirl fuel injection passages, disposed downstream side of the valve seat, for imparting a swirling force to fuel to thereby inject the fuel outside, each of the swirl fuel injection passages including:
• a swirl chamber that imparts a swirling force to fuel;
• a swirl chamber introduction passage that introduces fuel to the swirl chamber;
• and
• an orifice, disposed in the swirl chamber, for injecting fuel outside, wherein,
• when a rectangular coordinate system is imagined on an imaginary plane that extends perpendicularly to a central axis of the fuel injection valve and onto which the swirl fuel injection passage is projected, the rectangular coordinate system having a center of an inlet opening surface of the orifice as an origin and having an X-axis extending in parallel with a centerline of the swirl chamber introduction passage and being positive in a direction from an upstream side toward a downstream side of the swirl chamber introduction passage and a Y-axis extending perpendicularly to the X-axis and being positive in a direction away from the centerline, and
• when the positive direction of the X-axis is defined as 0° and an angular direction of rotation from an angular position of 0° toward the centerline of the swirl chamber introduction passage is defined as a positive angular direction,
• the orifice has an inclination direction set to fall within a range from 0° to 180°, both exclusive, the inclination direction being defined by a projection straight line representing a straight line that extends from the center of the inlet opening surface toward a center of an outlet opening surface of the orifice and that is projected onto the imaginary plane, and
• a part of the inlet opening surface of the orifice is formed in the swirl chamber introduction passage.