Patents by Inventor Matthew David Defever

Matthew David Defever 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 knock detection based on ethanol concentration in fuel
    Patent number: 8478511
    Abstract: A knock detection system for an engine includes an intensity module, a knock threshold module, and a detection module. The intensity module determines an engine vibration intensity during a first period of engine operation. The knock threshold module determines a knock threshold based on an ethanol concentration in a fuel supplied to the engine. The detection module determines whether engine knock has occurred during the first period by comparing the knock threshold and the engine vibration intensity.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: July 2, 2013
    Inventors: Wajdi B. Hamama, Craig M. Sawdon, Eric B. Ferch, Matthew David Defever, Hillary L. Broadus
  • SYSTEM AND METHOD FOR KNOCK DETECTION BASED ON ETHANOL CONCENTRATION IN FUEL
    Publication number: 20120048234
    Abstract: A knock detection system for an engine includes an intensity module, a knock threshold module, and a detection module. The intensity module determines an engine vibration intensity during a first period of engine operation. The knock threshold module determines a knock threshold based on an ethanol concentration in a fuel supplied to the engine. The detection module determines whether engine knock has occurred during the first period by comparing the knock threshold and the engine vibration intensity.
    Type: Application
    Filed: October 6, 2010
    Publication date: March 1, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Wajdi B. Hamama, Craig M. Sawdon, Eric B. Ferch, Matthew David Defever, Hillary L. Broadus