Patents by Inventor Shaun D. Fogle

Shaun D. Fogle 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 AND METHOD FOR CONTROLLING AIR-FUEL RATIO
    Publication number: 20160252036
    Abstract: The disclosure provides a method to operate an engine system. The method begins by determination of a current NOx value. If the current NOx value is greater than a first predetermined NOx target, an air-fuel ratio (AFR) set-point is adjusted by a first predetermined value in towards a rich AFR. Upon detection of the current NOx value below the first predetermined NOx target, a first average of NOx values for a first predetermined time is determined. The AFR set-point is adjusted by a second predetermined value and a second average of NOx values for a second predetermined time is determined. A delta NOx value is determined as a difference between the first average and the second average and compared with a second predetermined NOx target. The AFR set-point is determined when the delta NOx value is below the second predetermined NOx target.
    Type: Application
    Filed: May 10, 2016
    Publication date: September 1, 2016
    Applicant: Caterpillar Inc.
    Inventors: Hua Xu, Arvind Sivasubramanian, Shaun D. Fogle, David J. Lin