Patents by Inventor Bill Leisenring

Bill Leisenring 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).

  • Exhaust catalyst monitoring arrangement
    Patent number: 6922985
    Abstract: In a motor vehicle having an engine with an exhaust catalyst and an oxygen sensor upstream of the catalyst and an oxygen sensor downstream of the catalyst, a method for detecting whether the catalyst has aged. Over a test block period of time, the method periodically obtains upstream data points from an oxygen sensor located upstream of the catalyst and from and oxygen sensor located downstream of the catalyst. Absolute differences are calculated between consecutive pairs of the upstream data points and the downstream data points. A ratio between the sums of absolute differences is then calculated, and the ratio is used to determine whether the catalyst has aged.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: August 2, 2005
    Assignee: DaimlerChrysler Corporation
    Inventors: Wei Wang, Jason E Wielenga, Bill Leisenring, Douglas M Stander, Dave Carlson, Mark J Poublon, Chris J Booms, Tom Stephens, Craig Summers, Danny K Schuelke, Richard K Moote
  • Exhaust catalyst monitoring arrangement
    Publication number: 20040139732
    Abstract: In a motor vehicle having an engine with an exhaust catalyst and an oxygen sensor upstream of the catalyst and an oxygen sensor downstream of the catalyst, a method for detecting whether the catalyst has aged. Over a test block period of time, the method periodically obtains upstream data points from an oxygen sensor located upstream of the catalyst and from and oxygen sensor located downstream of the catalyst. Absolute differences are calculated between consecutive pairs of the upstream data points and the downstream data points. A ratio between the sums of absolute differences is then calculated, and the ratio is used to determine whether the catalyst has aged.
    Type: Application
    Filed: January 21, 2003
    Publication date: July 22, 2004
    Inventors: Wei Wang, Jason E. Wielenga, Bill Leisenring, Douglas M. Stander, Dave Carlson, Mark J. Poublon, Chris J. Booms, Tom Stephens, Craig Summers, Danny K. Schuelke, Richard K. Moote