Patent ID: 7422160
Filing Date: 2008-09-09
Classification: F02M,Y10S

Abstract:
1. A fuel injector for use with an internal combustion engine, the fuel injector comprising: an independently testable power group subassembly connected with an independently testable valve group subassembly so as to form a single unit; the power group subassembly having a first connector portion and including: the valve group subassembly having a second connector portion and including: a tube assembly having at least a portion engaged with the interior surface of the overmold, the tube assembly having an outer surface and a longitudinal axis extending between a first tube end and a second tube end, the tube assembly including: an armature assembly disposed within the tube assembly and displaceable along the longitudinal axis upon supplying energy to the electromagnetic coil, the armature assembly having a first armature end confronting the pole piece and a second armature end, the first armature end having an armature portion and the second armature end having a sealing surface, the armature assembly further defining a through bore and at least one aperture in fluid communication with the through bore; the first connector portion being fixedly connected to the second connector portion such that the at least a portion of the armature assembly is surrounded by the electromagnetic coil; a member disposed and configured to apply a biasing force against the armature assembly toward the second tube end; an adjusting tube to adjust the biasing force, the adjusting tube being disposed within the tube assembly proximate the second tube end; and a lift setting device disposed within the valve body to set the axial displacement of the armature assembly; and a seat assembly disposed in the tube assembly proximate the second tube end such that at least a portion of the seat assembly is disposed within the valve body, the seat assembly including: