Patent ID: 6769176
Filing Date: 2004-08-03
Classification: F02M,Y10T

Abstract:
A method of manufacturing a fuel injector comprising:welding an upper surface of a ball seat to a lower surface of a lower guide to form a welded ball seat and lower guide assembly, the welded ball seat and lower guide assembly providing a hermetic seal therebetween; loading both an orifice disk and the welded ball seat and lower guide assembly into a downstream end of a valve body; welding the valve body to the ball seat; retaining the orifice disk in the downstream end of the valve body; welding a ball to a downstream end of an armature stem forming an armature assembly; loading the armature assembly through an upstream end of the valve body; pressing an inlet tube into the valve body a predetermined distance; welding the inlet tube directly to the valve body to provide a valve group assembly; pressing a power group comprising a housing and a coil sub assembly onto the inlet tube of the valve group assembly; retaining the power group to the inlet tube by sliding a plastic retainer through slots aligned in the power group and slots machined in the inlet tube; installing first a spring, then second an adjusting tube, a predetermined distance into a top end of the inlet tube; securing the adjusting tube in place after completing the installation; and pressing a combination retainer/fuel filter in an upstream end of the inlet tube.