Patent ID: 6892970

Claim:
An electromagnetic actuator for a fluid pressure control valve in a fuel injector for an internal combustion engine, the electromagnetic actuator comprising: a control module including a fuel pressure control valve; an armature connected to the fuel pressure control valve; and a stator assembly including a magnetic core sub-assembly comprising at least two segments and a bobbin with electrical windings, the stator assembly being electrically connected to a power source, the stator assembly being energizable to produce a magnetic field to draw the armature towards the stator assembly; the segments being integrated and assembled together to define the magnetic core sub-assembly, the bobbin windings encircling the core sub-assembly; each segment having contact surfaces engageable with contact surfaces of an adjacent segment, a contact surface of each segment engaging a contact surface of an adjacent segment at an interface having high electrical resistance whereby core eddy currents in the core sub-assembly are reduced.