Patent ID: 6568609
Filing Date: 2003-05-27
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: an inlet tube having a first inlet tube end and a second inlet tube end; a non-magnetic shell having a first shell end connected to the second inlet tube end at a first connection and further having a second shell end; and a valve body having a first valve body end connected to the second shell end at a second connection and further having a second valve body end; a seat secured at the second end of the tube assembly, the seat defining an opening; an armature assembly disposed within the tube assembly; a member biasing the armature assembly toward the seat; an adjusting tube located in the tube assembly, the adjusting tube engaging the member and adjusting a biasing force of the member; a filter located at the first end of the tube assembly, the filter having retaining portion; an O-ring circumscribing the first end of the tube assembly, the retaining portion of the filter maintaining the O-ring proximate the first end of the tube assembly; 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 extending out of the overmold along the longitudinal axis; and a second attaching portion fixedly connected to the first attaching portion.