Solenoid stator assembly for fuel injectors

摘要

The stator assembly 10 comprises an E-shaped stator core 12 including three parallel pole pieces extending orthogonally 60 therefrom. Each of the outer pole pieces 20, 22 has an attachment slot formed 42, 44 in its outermost side. A coil is disposed around an insulating spool disposed on the central pole piece, and leads from the coil are connected to terminals such as 54. A flange on one end of the spool exerts outward forces on the outer polo pieces, prestressing them to resist further flexing caused by outwardly directed forces applied by fuel under pressure. An insulating cover 60 is molded around the solenoid stator assembly, the cover being bonded to the stator core by the attachment slots to enhance adherence of the cover material to the stator core and provide a barrier to any fuel attempting to traverse the interface between the insulating cover and the outer pole pieces.