Patent attributes
An electromagnetic fuel injection valve having a cylindrical magnetic body, the front end of a cylindrical non-magnetic body surrounding a part of a movable core coaxially connected to a valve body is connected coaxially to the rear end of the cylindrical magnetic body, and a fixed core is fitted into and fixed to a rear portion of the cylindrical non-magnetic body, wherein the movable core includes a tubular sliding portion having an outer peripheral face that is in sliding contact with an inner peripheral face of a rear portion of the cylindrical magnetic body, a rear tubular opposing portion, and a front tubular opposing portion, and when the diameter of the rear tubular opposing portion is D1, the diameter of the front tubular opposing portion is D2, and the diameter of the tubular sliding portion is D3, they are set so that D1<D2<D3.
