Method of manufacturing top stop-type fuel injector
A method is described of manufacturing a top stop fuel injector for an internal combustion engine from a pressure-time-delivery fuel injector of the type having a pressure-time-delivery injector body which includes an annular shoulder for seating the injector against the engine head, a barrel and cup positioned in end-to-end relation, a retainer extending around the barrel and securing the barrel and cup to the injector body, a plunger bore defined by inner walls of the injector body, barrel, and cup, a plunger positioned for restrictive movement within the bore for generation injection pressure within the injector from a relatively low delivery pressure and a return spring mounted within the upper end of the injector body remote from the cup in concentric relation to the plunger. The method consists of: (a) reducing the length of the injector body above the shoulder; (b) forming external threads on the remaining upper end of the injector body above the shoulder adjacent the free end thereof; (c) mounting a collar, having mating internal threads, on the upper end of the injector body; and (d) threadingly mounting a top stop within the collar for adjustable positioning relative to the return spring and plunger to arrest the plunger at a predetermined upper extent of travel.
- Assignee:
- Cummins Atlantic, Inc., Charlotte, NC
- Patent Number(s):
- US 4601086
- OSTI ID:
- 5476232
- Resource Relation:
- Patent File Date: Filed date 15 Oct 1984
- Country of Publication:
- United States
- Language:
- English
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