Patents by Inventor Steve J. Charlton

Steve J. Charlton 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).

  • System for controlling recirculated exhaust gas temperature in an internal combustion engine
    Patent number: 5732688
    Abstract: A system for controlling the temperature of recirculated exhaust gas supplied to an internal combustion engine is provided. In one embodiment, the system includes a heat exchanger having the recirculated exhaust gas flowing therethrough and further having coolant fluid flowing therethrough. A control valve is disposed within the flow path of the coolant fluid, and the valve position is modulated to vary the rate of coolant fluid flow through the heat exchanger, thereby controlling the temperature of the recirculated exhaust gas supplied by the heat exchanger. In another embodiment, the heat exchanger defines a number of exhaust gas flow passages therethrough and a number of gas flow control valves are disposed between the exhaust gas inlet of the heat exchanger and the number of exhaust gas flow passages.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: March 31, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Steve J. Charlton, Leslie A. Roettgen