Patents by Inventor Grant J. Ovist

Grant J. Ovist 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).

  • Adjustment of measured oxygen storage capacity based on upstream O2 sensor performance
    Patent number: 9650981
    Abstract: A vehicle system includes an upstream oxygen monitoring module that monitors an upstream exhaust oxygen sensor and determines an upstream transition period based on a time at which the upstream exhaust oxygen sensor detects a rich-to-lean fueling transition. A delay determining module determines a delay period associated with the upstream exhaust oxygen sensor's detection of the fueling transition. An upstream correcting module determines a corrected upstream transition period based on the upstream transition period and the delay period. A downstream oxygen monitoring module monitors a downstream exhaust oxygen sensor and determines a downstream transition period based on the response of the downstream exhaust oxygen sensor to the fueling transition. An oxygen storage capacity (OSC) determining module determines an OSC period based on the corrected upstream transition period and the downstream transition period.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: May 16, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Thomas J. Large, Grant J. Ovist, Sharianne Ziola, Timothy Wendling, J. Michael Gwidt