Patent ID: 8888022

Claim:
A fuel injection valve comprising: a movable valve; a magnetic circuit for moving the movable valve; a guide having a bore for guiding movement of the movable valve; and a nozzle incorporating the guide, with a bottom having a fuel injection orifice, wherein a bottom of the guide is interlocked and sheared by at least two levels of steps provided on an inner surface of the nozzle, one of the at least two levels has a step with an inner diameter smaller than an inner diameter of a step of another of the at least two levels, and a sheared surface of the guide is coupled with side faces of the at least two levels of the steps provided on the inner surface of the nozzle by an auto-straining force as a residual stress generated by plastic deformation of the guide, and a clearance exists between the inside diameter of the nozzle and the outside diameter of the guide except for coupled parts at the steps located at the bottom of the guide.