Patent ID: 6499677
Filing Date: 2002-12-31
Classification: F02M

Abstract:
A fuel injector for use with an internal combustion engine, the fuel injector comprising:a valve group subassembly including: a tube assembly having a longitudinal axis extending between a first end and a second end, the tube assembly including a magnetic pole piece having a first face having a first surface area; a seat secured at the second end of the tube assembly, the seat defining an opening; an armature assembly disposed within the tube assembly, the armature assembly having a second face disposed from the first face by a gap, the second face having a second surface area smaller than the first surface area; a member biasing the armature assembly toward the seat; a filter assembly located in the tube assembly, the filter assembly engaging the member and adjusting a biasing force of the member; and a first attaching portion; and a coil group subassembly including: an overmold; a solenoid coil operable to displace the armature assembly with respect to the seat; a housing having a first portion and a second portion, the first portion encased within the overmold, the first portion surrounding a portion of the solenoid coil, and the second portion forming a flange so as to retain a sealing member between the flange and the overmold; and a second attaching portion fixedly connected to the first attaching portion.