Patents by Inventor David C. Waskiewicz

David C. Waskiewicz 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).

  • Method and system for monitoring an evaporative purge system
    Patent number: 5614665
    Abstract: A method and system for monitoring an evaporative purge system for malfunctions and leaks. First, a plurality of predetermined entry conditions are checked for satisfaction. If the plurality of predetermined entry conditions have been met, a flow of vapor in the evaporative purge system is determined. The evaporative purge system is then sealed from atmosphere so as to pull a vacuum on the fuel tank. The vacuum is compared to a predetermined vacuum range. If the vacuum is within the predetermined vacuum range, the vacuum is allowed to stabilize to obtain a stabilized vacuum level. A decrease in the stabilized vacuum level is determined after a predetermined amount of time to obtain a vacuum bleed-up. A vacuum bleed-up acceptance threshold is then determined based on the determined flow of vapor and the vacuum bleed-up is then compared to the vacuum bleed-up acceptance threshold.
    Type: Grant
    Filed: August 16, 1995
    Date of Patent: March 25, 1997
    Assignee: Ford Motor Company
    Inventors: Patrick J. Curran, Juliette J. McCoy, Michael A. Panganis, David C. Waskiewicz, Bryce A. Schwager, Edward G. Rychlick