Allied Corporation

Thomas E Hensley

Richard D Weaver

A method for controlling fuel injector lift control provides accurate lift dimensions over the life of the injector 10. The method can be implemented by sophisticated equipment for more automated operation but the steps of measuring and determining the spacing between the pole piece 18 and the armature member 26 and forming a spacer 12 as a result of such measurements, substantially follow the concept of differential gaging 36 and stepper motor 52 controlled press 38. Once a spacer 12 is sized, it is mated with the housing member 14 and the valve body assembly 24 and held in place by unitizing the injector 10.

Method for controlling fuel injector lift

A bottom feed fuel injector as used in single point fuel injection systems is fabricated from sintered iron or powdered metal. This reduces secondary machining operations and therefore reduces cost of injectors. Additionally, static adjustments are capable of being made from the end of the injector opposite the discharge end. A top feed injector is described wherein several of its critical elements are molded from sintered iron or powdered metal.

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Newport News, VA, United States of America

Thomas E Hensley