Patent ID: 6848636

Claim:
A fuel injection valve comprising: a valve seat portion having an inner circumferential surface including a valve seat; a nozzle hole plate disposed at a downstream side of a fuel passage of the valve seat, the nozzle hole plate having a nozzle hole for injecting fuel flowing out from the fuel passage; and a valve member, which seats on the valve seat to close the fuel passage and unseats from the valve seat to open the fuel passage, wherein a diameter of the inner circumferential surface decreases as approaching to the downstream side, wherein the nozzle hole of the nozzle hole plate is formed so that a length of a radial outside of the nozzle hole with respect to a shaft center of the fuel injection valve is smaller than that of a radial inside of the nozzle hole, the radial outside of the nozzle hole being disposed in an outer portion of the nozzle hole plate and the radial inside of the nozzle hole being disposed in an inner portion of the nozzle hole plate, wherein at least one of the radial outside of the nozzle hole and the radial inside of the nozzle hole has a portion angled away from the shaft center in a flow direction of the injection fuel, and wherein the inner portion of the nozzle hole plate has a top surface and a bottom surface which are parallel, and the inner portion of the nozzle hole plate is thicker than the outer portion of the nozzle hole plate.