Patents by Inventor Robert L. Cholvin

Robert L. Cholvin 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).

  • Supercharged diesel engine air inflow control system
    Patent number: 4515136
    Abstract: A control system is provided for a supercharged diesel engine to control engine air inflow in response to an operator-selected fuel flow and in accordance with a predetermined air-fuel ratio schedule chosen for minimizing undesirable exhaust emissions throughout a broad range of engine operating conditions.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: May 7, 1985
    Assignee: The Garrett Corporation
    Inventors: Robert L. Cholvin, Charles E. McInerney, James N. Nancarrow, Jack L. Gantz
  • Supercharged diesel engine air inflow control system
    Patent number: 4513730
    Abstract: A control system is provided for a supercharged diesel engine to control engine air flow in response to an operator-selected fuel flow and in accordance with a predetermined air-fuel ratio schedule chosen for minimizing undesirable exhaust emissions throughout a broad range of engine operating conditions. The control system includes a force-biased relief valve movable between closed and open positions in response to the pressure of air supplied to the engine, wherein the force-bias acting upon the relief valve is altered in response to the operator-selected fuel flow to the engine.
    Type: Grant
    Filed: April 9, 1984
    Date of Patent: April 30, 1985
    Assignee: The Garrett Corporation
    Inventors: Robert L. Cholvin, Charles E. McInerney, James N. Nancarrow, Jack L. Gantz
  • Supercharged diesel engine air flow control system
    Patent number: 4489702
    Abstract: A control system is provided for a supercharged diesel engine to control engine air inflow in response to an operator-selected fuel flow and in accordance with a predetermined air-fuel ratio schedule chosen for minimizing undesirable exhaust emissions throughout a broad range of engine operating conditions. The control system includes a force-biased relief valve for adjusting engine air inflow, wherein the relief valve is movably responsive to the pressure of air supplied to the engine and the force-bias is controlled in accordance with engine fuel flow.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: December 25, 1984
    Assignee: The Garrett Corporation
    Inventors: Robert L. Cholvin, Charles E. McInerney, James N. Nancarrow, Jack L. Gantz
  • Turbocharger control
    Patent number: 4283912
    Abstract: A pneumatic control for turbochargers includes an evaucated bellows-operated servo valve for controlling the pressure differential across a diaphragm, which in turn controls the position of a turbocharger wastegate valve. Discharge pressure from a turbocharger compressor is applied to both sides of the diaphragm. The bellows-operated servo valve is operable to vent one side of the diaphragm whenever the discharge pressure exceeds a predetermined magnitude resulting in a pressure differential across the diaphragm to control the position of the waste gate valve.
    Type: Grant
    Filed: June 12, 1979
    Date of Patent: August 18, 1981
    Assignee: The Garrett Corporation
    Inventor: Robert L. Cholvin