Fuel injection valve and fuel injection system

摘要

A fuel injection valve which has: swirl chambers each having an inner wall whose curvature is gradually increased from upstream to downstream along fuel flow; passages for swirling motion, the passages permitting 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. 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 line perpendicularly intersecting a line segment that interconnects the centers of the narrow-angle injection holes.

主权项

1. 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, andsaid wide-angle injection hole is smaller in axial length than said narrow-angle injection holes.