Fuel injection valve and fuel injection system

A fuel injection valve comprising:

• swirl chambers each having an inner wall whose curvature is gradually increased from an upstream to a downstream along a flow of fuel direction;
• passages for swirling motion, configured to permit introduction of fuel into the swirl chambers;
• fuel injection holes opening into the swirl chambers and including at least two narrow-angle injection holes and a wide-angle injection hole from which at least two narrow-angle sprays and a wide-angle spray are respectively ejected;
• and
• an orifice plate provided with the injection holes and having a center, wherein
• the narrow-angle injection holes are spaced a given distance from the center of the orifice plate,
• the wide-angle injection hole is formed on a bisecting line perpendicularly intersecting a line segment that interconnects centers of the narrow-angle injection holes, and
• said wide-angle injection hole is smaller in axial length than said narrow-angle injection holes.