Patent ID: 6874710

Claim:
A fuel injection valve, comprising: I) a magnetic barrel body made of a magnetic material and shaped substantially into a barrel, the magnetic barrel body including; a) a fuel passage, and b) a flange portion disposed at a first end on a fuel's influx side connected to a fuel delivery pipe, the flange portion having a diameter so formed as to expand; II) a core barrel made of a magnetic material and shaped substantially into a barrel, the core barrel being inserted into the magnetic barrel body; III) a valve seat member positioned on a downstream side of the core barrel and disposed in the magnetic barrel body, the valve seat member including a valve seat for communicating a fuel; IV) a valve body positioned between the core barrel and the valve seat member, the valve body being disposed in the magnetic barrel body, the valve body being so displaced as to be seated on the valve seat of the valve seat member and to be separated from the valve seat of the valve seat member; V) an O-ring positioned in a vicinity of the flange portion of the magnetic barrel body, the O-ring being so disposed on an outer periphery on the fuel's influx side of the magnetic barrel body as to seal an area defined between the fuel delivery pipe and the magnetic barrel body, the O-ring in a progress of being mounted on the outer periphery on the fuel's influx side of the magnetic barrel body being free from abutting on the flange portion of the magnetic barrel body; and VI) a fuel filter assembly disposed at the first end on the fuel's influx side of the magnetic barrel body, the fuel filter assembly collecting a foreign matter in the fuel flowing in from the fuel delivery pipe, the fuel filter assembly including a flange abutting on the flange portion of the magnetic barrel body, the flange of the fuel filter assembly being made of a material lower in hardness than the magnetic material of the magnetic barrel body, the flange of the fuel filter assembly having a diameter larger than the diameter of the flange portion of the magnetic barrel body.