Patents by Inventor Dave L. Dunnuck

Dave L. Dunnuck 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 limiting rotational speed of a turbocharger
    Patent number: 7100375
    Abstract: A system for limiting the rotational speed of a turbocharger is disclosed. The turbocharger includes a compressor having an outlet fluidly coupled to an intake manifold of an internal combustion engine and a compressor outlet, a turbine having an inlet fluidly coupled to an exhaust manifold of the engine and an outlet. A control computer is configured to compute a maximum compressor outlet pressure value as a function of the compressor inlet pressure, the compressor inlet temperature, an operating condition other than the compressor inlet pressure or temperature and a maximum allowable turbocharger speed value, and to control a turbine swallowing capacity or efficiency control mechanism in a manner that limits compressor outlet pressure to the maximum compressor outlet pressure value to thereby limit rotational speed of the turbocharger to the maximum turbocharger speed value. The operating condition may be, for example, engine intake air flow rate or engine speed.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: September 5, 2006
    Assignee: Cummins, Inc.
    Inventors: Scott R. Baize, Jason V. Dukes, Norbert J. Rehm, IV, Dave L. Dunnuck
  • System for limiting turbocharger rotational speed
    Patent number: 7007472
    Abstract: A system for limiting the rotational speed of a turbocharger is disclosed. The turbocharger includes a compressor having an outlet fluidly coupled to an intake manifold of an internal combustion engine and a compressor outlet, a turbine having an inlet fluidly coupled to an exhaust manifold of the engine and an outlet. A control computer is configured to compute a maximum compressor outlet pressure value as a function of the compressor inlet pressure, the compressor inlet temperature, an operating condition other than the compressor inlet pressure or temperature and a maximum allowable turbocharger speed value, and to control a turbine swallowing capacity or efficiency control mechanism in a manner that limits compressor outlet pressure to the maximum compressor outlet pressure value to thereby limit rotational speed of the turbocharger to the maximum turbocharger speed value. The operating condition may be, for example, engine intake air flow rate or engine speed.
    Type: Grant
    Filed: February 10, 2004
    Date of Patent: March 7, 2006
    Assignee: Cummins, Inc.
    Inventors: Scott R. Baize, Jason V. Dukes, Norbert J. Rehm, IV, Dave L. Dunnuck