Patent ID: 7150417

Claim:
A fuel injection valve comprising: a valve seat member having a valve seat with a fuel injection aperture; a valve body that is movable between a close position wherein the valve body is put on the valve seat and an open position wherein the valve body is separated from the valve seat; a biasing member that biases the valve body in a direction of the close position; an electromagnetic coil that, upon energization, moves the valve body in a direction of the open position against the biasing force of the biasing member; a nozzle plate connected to the valve seat member in a manner to cover the fuel injection aperture, the nozzle plate having at a part thereof facing the fuel injection aperture a domed portion that is projected away from the fuel injection aperture, the domed portion having a plurality of fuel injection openings; and a side wall that extends around and along a periphery of the nozzle plate so as to form a fuel holding recess that is defined by the nozzle plate other than domed portion and the side wall, the fuel holding recess being able to hold a certain amount of a fuel by the force of a surface tension possessed by the fuel, wherein the nozzle plate is circular in shape and the side wall is cylindrical in shape, and in which the valve seat member is cylindrical in shape, and in which the cylindrical side wall is a lower end part of a magnetic metal tube that surrounds the cylindrical valve seat member.