Patents by Inventor Peter W. Murphy

Peter W. Murphy 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).

  • Knock detection method and apparatus with dual integration windows
    Patent number: 5537855
    Abstract: A knock detection method and apparatus integrates a knock sensor signal (107) over a first period and provides a first integrated knock sensor signal (119), and integrates the knock sensor signal (107) over a second period and provides a second integrated knock sensor signal (139). A knock indication (131) is provided dependent on an amplitude of the first integrated knock sensor signal (119) and an amplitude of the second integrated knock sensor signal (139) and independent of the influence of the variations of the knock sensor (101) potential sensor to sensor gain variation.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: July 23, 1996
    Assignee: Motorola, Inc.
    Inventors: Roy E. Hunninghaus, Peter W. Murphy, Kevin M. Andrews