Patents by Inventor Dereck Glenn Heffron

Dereck Glenn Heffron 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).

  • Detection of failing emissions sensors
    Patent number: 10713933
    Abstract: An emissions sensor health monitor can acquire nitrogen oxide (NOx)-in values measured by an input emissions sensor of the machine and NOx-out values measured by an output emissions sensor of the machine. The emissions sensor health monitor can identify samples of the machine channel data that meet criteria associated with an idle operating condition of an engine of the machine, and determine NOx delta values for the samples. The emissions sensor health monitor can determine that the NOx delta values are above a preset acceptable threshold for at least a threshold time period, and in response perform one or more responsive actions.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: July 14, 2020
    Assignee: Caterpillar Inc.
    Inventors: Deepashri Vinayak Phatak, Dereck Glenn Heffron, Jun Cai