Patent ID: 6769636
Filing Date: 2004-08-03
Classification: F02M

Abstract:
A fuel injector for use with an internal combustion engine, the fuel injector comprising:a valve group subassembly that is independently operable and testable prior to assembly in a fuel injector, the valve group subassembly including: a tube assembly having a longitudinal axis extending between a first end and a second 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, the armature assembly including: a first armature assembly end having a magnetic portion and second armature assembly end having a sealing portion; 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 that is indepedently operable and testable prior to being assembled in a fuel injector, the coil group subassembly including: a solenoid coil operable to displace the armature assembly with respect to the seat; and a second attaching portion fixedly connected to the first attaching portion.