Patents by Inventor Hugh M. Daugherty

Hugh M. Daugherty has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Electronically controlled lubricating oil and fuel blending system
    Patent number: 6079380
    Abstract: An electronically controlled lube oil and fuel blending system is provided which controls the amount of lube oil delivered from an engine lube oil supply system to an engine fuel supply system based on the amount of fuel added to the fuel supply system thereby maintaining a constant lube oil/fuel ratio or lube oil concentration in the fuel supply system 16 regardless of variations in engine operation thereby minimizing emissions, such as particulate matter. The system includes a lube oil injection circuit connecting the engine lube oil supply system to the fuel supply system and an emission compliance lube oil concentration control system for controlling a lube oil concentration in the fuel supply system to maintain compliant engine emissions during engine operation.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: June 27, 2000
    Assignee: Cummins Engine Company, Inc.
    Inventors: Robert A. Jorgensen, Steven R. Butler, Hugh M. Daugherty