Patent ID: 7866574
Filing Date: 2011-01-11
Classification: F02M,Y10T

Abstract:
1. A remanufactured fuel injector tip removed from an engine after service life comprising: an injector tip body including a tip body outer surface and a tip body inner surface, and defining a longitudinal axis, the injector tip body further comprising a first tip portion of a first material having experienced a service life and a new second tip portion of a material compatible for friction welding with the first material; said first tip portion having a tip portion inner surface which includes a first axial segment of the tip body inner surface, and a tip portion outer surface which includes a first axial segment of the tip body outer surface, said first tip portion further including a proximal end, and a distal end including a distal end surface positioned at a first axial location and adjoining the tip body outer surface, and a fuel passage extending from the proximal end toward the distal end; said new second tip portion including a plurality of spray orifices positioned at a second axial location which is distal to the first axial location and being in fluid communication with said fuel passage; said injector tip body further comprising a third tip portion, including a friction weld formed during remanufacturing of said fuel injector tip, attaching said first tip portion to said new second tip portion and comprising a fused interface of said first material and material of said new second tip portion; and said friction weld having an inner weld surface which includes a second axial segment of said tip body inner surface, and an outer weld surface which includes a second axial segment of said tip body outer surface, and the friction weld extending from the inner weld surface to the outer weld surface.