Patents by Inventor Jonathan D. Mehl

Jonathan D. Mehl 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).

  • Engine control system with exhaust gas recirculation and method for determining proper functioning of the EGR system in an automotive engine
    Patent number: 6024075
    Abstract: An engine control for an automotive engine having an inlet system and an exhaust system includes an EGR valve for permitting exhaust gas to flow from the exhaust system to the inlet system, and an engine controller for operating the EGR valve by opening the valve during successive test periods separated by non-uniform intervals, while measuring engine speed response to the opening of the EGR valve so as to diagnose an improperly operating EGR valve.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: February 15, 2000
    Assignee: Ford Global Technologies, Inc.
    Inventors: David Karl Bidner, Daniel V. Orzel, Jonathan D. Mehl, Ian Jay Czaja