Patent attributes
An electromagnetic fuel injection valve (I) is provided that includes a fixed core (5) made of a high hardness ferrite magnetic material, and a movable core (12) that has fixed thereto by press-fitting a stopper element (14) that is nonmagnetic or is more weakly magnetic than the movable core (12), the stopper element (14) abutting directly against the fixed core (5) so as to maintain an air gap (g) between the two cores (5) and (12) when a coil (30) is energized. In this way, high abrasion resistance and responsiveness can be imparted to the fixed core and the movable core without subjecting the two cores to a troublesome abrasion resistance treatment to provide a plating layer, etc., and without providing a valve body stopper plate, thereby contributing to a reduction in the cost of the electromagnetic fuel injection valve.
