NON-MAGNETIC SHELL FOR WELDED FUEL INJECTOR

摘要

A solenoid actuated fuel injector (19) includes an elongated ferromagnetic inlet tube (12) having a major outside diameter portion (20) and a reduced outside diameter portion (22) and a step (24) between the major and reduced outside diameter portions. A two-ended non-magnetic shell (14) including an elongated tubular portion (26) and a valve body shell engaging portion (28) is fittable over the inlet tube reduced diameter portion and abuts the step in the inlet tube at one end. A coil (16) is mountable around the elongated tubular portion (26) of the non-magnetic shell (14a) and seated on the valve body shell engaging portion (28). The coil has a length shorter than the elongated tubular portion (26), at at least one circumferential point (32) of the coil, allowing the inlet tube to be welded to the non-magnetic shell upon rotation relative to the coil without having to move the coil longitudinally.