Patent ID: 7128282
Filing Date: 2006-10-31
Classification: F02M

Abstract:
1. A fuel injection valve, comprising: a valve body formed with a valve seat on an inner peripheral surface providing a fuel passage; an injection hole plate, which is disposed in a downstream position of a flow of fuel with respect to the valve seat and is formed with a plurality of injection holes for injecting the fuel flowing through the fuel passage; and a valve member for stopping the fuel injection through the injection holes when the valve member is seated on the valve seat and for allowing the fuel injection through the injection holes when the valve member is separated from the valve seat, wherein each injection hole is formed with an inlet side opening on a valve seat side and an outlet side opening on a side opposite from the valve seat so that at least the outlet side opening is formed in a flattened shape having a major axis and a minor axis, each injection hole is formed so that a major axis of the inlet side opening is shorter than the major axis of the outlet side opening and so that a minor axis of the inlet side opening is not shorter than the minor axis of the outlet side opening, and each injection hole is formed so that a sectional area thereof gradually changes along a direction from the inlet side opening to the outlet side opening.