Cummins Inc.

Cummins Engine Company, Inc.

Dana E Richardson

Aaron S Quinton

Patrick R Shea

Doug Doup

David P Quigley

John S Winter

Freidoon Rastegar

An internal combustion engine piston having a combustion bowl with fuel control structure for redirecting at least a portion of the fuel exiting the combustion bowl. One form of the piston includes a sharp edge disposed at the outer surface of the piston adjacent the entrance to the combustion bowl and a rounded fuel receiving lip located within the combustion bowl.

Internal combustion engine piston

A coated piston ring and method of manufacture for internal combustion engines and compressors. The piston ring having a outer peripheral surface that is coated with a thin substantially final finish spray wear resistant coating for contacting the cylinder wall. The material coating is deposited by high velocity oxygen fuel spray apparatus and a sharp bottom edge is lapped thereon for contacting the cylinder wall of the apparatus. The method of manufacturing comprising rotating a plurality of piston rings about a central axis while the high velocity oxygen fuel gun sprays molten coating material thereon. The molten coating material forming a mechanical interlock with the ring blank to produce a substantially final finish spray coating on the periphery of the piston rings.

Method of manufacturing coated piston ring

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Columbus, IN, United States of America

Dana E Richardson