Patent ID: 8505835

Claim:
A fuel injector for a fuel-injection system of an internal combustion engine, comprising: a valve-seat surface; a valve-closure member for forming a sealing seat together with the valve-seat surface; an excitable actuator for actuating the valve-closure member; at least one spray-discharge orifice situated downstream from the valve-seat surface; a one-piece connection element connecting to and extending from a fuel supply, the connection element being an inner pole of a magnetic circuit; and a nozzle body one of (a) including the valve-seat surface and (b) accommodating a valve-seat body having the valve-seat surface, the nozzle body being inserted into, and fixedly connected to, the connection element, wherein: the nozzle body is held in the fixed connection to the connection element via a junction point at which the nozzle body and the connection element are directly joined; the connection element includes a downstream extension that is delimited from a base section of the connection element by reduction of thickness of the extension relative to the base section, an enlarged cavity being formed by the reduction of the thickness; and the inner pole and the extension are magnetically separated from one another in that there is a thin-walled connection between them, which constitutes a magnetic restriction.