Patent ID: 7942348

Claim:
A fuel injector comprising: an armature; a restoring spring acting upon the armature; a solenoid cooperating with the armature; a valve needle, the armature together with the valve needle forming an axially movable valve part; a valve seat body; a valve closing body forming a seat seal with the valve seat body, situated on the valve needle; a valve sleeve; at least one connection fitting as an upstream connection of the fuel injector; and a seat support as a downstream connection of the fuel injector, wherein at least one of the connection fitting and the seat support is composed of plastic; wherein a first connection of the connection fitting to the valve sleeve is sealed by a first O-ring, the first connection being form-fitted to the valve sleeve upstream of the solenoid; wherein a second connection of the seat support to the valve sleeve is sealed by a second O-ring, the second connection being form-fitted to the valve sleeve downstream of the solenoid; wherein an upstream end face of the connection fitting forms an upstream end of the fuel injector; and wherein an upstream-side section of the valve sleeve is configured as an internal pole, and the connection fitting is form-fitted in a recess of the internal pole in such a way that a fixed connection is produced between the connection fitting and the internal pole.