Patent ID: 7021566

Claim:
A fuel injector comprising: a coil group subassembly being independently testable, the coil group subassembly including: a solenoid coil; a coil housing surrounding a portion of the solenoid coil; and a first attaching portion disposed on the housing; and a valve group subassembly being independently testable, the valve group subassembly including: a tube assembly having a longitudinal axis extending between a first tube end and a second tube end, the tube assembly having a second attaching portion contiguous to the first attaching portion, the first and second attaching portions being fixedly connected proximate the second tube end; an armature assembly disposed in the tube assembly, the armature assembly having a closure member; and a seat assembly disposed in the tube assembly proximate the second tube end, the seat assembly including: a flow portion, the flow portion extending along the longitudinal axis between a first surface and an orifice disk retention surface at a first length, the flow portion having a seat orifice extending therethrough; an orifice disk coupled to the orifice disk retention surface so that the orifice plate is aligned in a fixed spatial orientation with respect to the flow portion; and a securement portion, the securement portion extending along the longitudinal axis away from the orifice disk retention surface at a second length greater than the first length.