Patent ID: 7021569

Claim:
An electromagnetic fuel injector, in which a hollow fixed core, an electromagnetic coil and a yoke are arranged from the center toward the outer diameter, a needle with a valve element is contained in a nozzle body fixed to the lower portion of the yoke, and the needle is urged toward a valve seat by the force of a return spring, the electromagnetic fuel injector characterized in that: a fuel swirler positioned upstream of an injection orifice is disposed at the tip of the nozzle body, the fixed core and the nozzle body being coupled to each other through a non-magnetic cylindrical seal ring press-fitted and welded to the outer circumference of one end on the nozzle body side of the fixed core and the inner circumference of one end of the nozzle body; and the inner circumference of the fuel swirler and the inner circumference of the seal ring function as a guide for slidably guiding a stroke movement of the needle.