Patents by Inventor Sean R. Strubhar

Sean R. Strubhar 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).

  • Humidity compensated charge density control for an internal combustion engine
    Patent number: 6728625
    Abstract: Apparatus and methods for determining a desired charge density for an engine having an inlet air pathway. A first characteristic indicative of an engine speed of the engine is determined. A second characteristic indicative of a load on the engine is determined. A third characteristic indicative of a humidity of air in the inlet air pathway. A value indicative of a desired charge density of a combustion mixture for the engine is determined as a function of the first, second, and third characteristics.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: April 27, 2004
    Assignee: Caterpillar Inc
    Inventors: Sean R. Strubhar, William C. Boley
  • HUMIDITY COMPENSATED CHARGE DENSITY CONTROL FOR AN INTERNAL COMBUSTION ENGINE
    Publication number: 20040064242
    Abstract: Apparatus and methods for determining a desired charge density for an engine having an inlet air pathway. A first characteristic indicative of an engine speed of the engine is determined. A second characteristic indicative of a load on the engine is determined. A third characteristic indicative of a humidity of air in the inlet air pathway. A value indicative of a desired charge density of a combustion mixture for the engine is determined as a function of the first, second, and third characteristics.
    Type: Application
    Filed: September 27, 2002
    Publication date: April 1, 2004
    Inventors: Sean R. Strubhar, William C. Boley
  • Method and apparatus configured to maintain a desired engine emissions level
    Patent number: 6662795
    Abstract: The present invention is configured to maintain a desired emissions level of an engine having an intake manifold and an exhaust manifold, and an exhaust stack is disclosed. The method includes the steps of establishing a desired emissions level, establishing an engine speed, establishing an engine load, establishing at least one characteristic of one of an intake air and an exhaust gas, and determining a fuel command in response to the engine speed, the engine load, and the desired emissions level, the fuel command resulting in the engine maintaining the desired emissions level.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: December 16, 2003
    Assignee: Caterpillar Inc
    Inventors: Darryl D. Baldwin, Sean R. Strubhar, Choy Yap
  • Method and apparatus configured to maintain a desired engine emissions level
    Publication number: 20030034018
    Abstract: The present invention is configured to maintain a desired emissions level of an engine having an intake manifold and an exhaust manifold, and an exhaust stack is disclosed. The method includes the steps of establishing a desired emissions level, establishing an engine speed, establishing an engine load, establishing at least one characteristic of one of an intake air and an exhaust gas, and determining a fuel command in response to the engine speed, the engine load, and the desired emissions level, the fuel command resulting in the engine maintaining the desired emissions level.
    Type: Application
    Filed: August 20, 2001
    Publication date: February 20, 2003
    Inventors: Darryl D. Baldwin, Sean R. Strubhar, Choy Yap