Patent ID: 6523756
Filing Date: 2003-02-25
Classification: F02M,Y10S

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; a lift sleeve telescopically disposed within the tube assembly a predetermined distance to set a relative axial position between the seat and the tube assembly; 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; 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 least within the tube assembly; and a first attaching portion; and a 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.