Patent ID: 7086614
Filing Date: 2006-08-08
Classification: F02M

Abstract:
1. A fuel injector for a fuel injection system in a internal combustion engine, comprising: a magnet coil; an internal pole including an outlet-side armature stop surface, said internal pole including a shoulder arranged on the outlet-side armature stop surface; an armature including an inlet-side armature surface, the armature configured to strike the internal pole with the inlet-side armature surface; an annular stepped prominence arranged on at least one of the inlet-side armature surface and the outlet-side armature stop surface, the annular stepped prominence forming a choke point; a restoring spring configured to act upon the armature in a closing direction; a valve closing body; a valve needle that is non-positively engaged with the armature for actuating the valve closing body; a valve seat surface; and a sealing seat formed by the valve closing body and the valve seat surface.