Patents by Inventor Mohammed Yussouff

Mohammed Yussouff 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).

  • Air/fuel control system with catalytic converter monitoring
    Patent number: 5497618
    Abstract: A control system and method maintains engine air/fuel operation near stoichiometry (104-178) in response to exhaust gas oxygen sensors (44,52) positioned both upstream and downstream of a catalytic converter (50). A non-catalytic exhaust gas oxygen sensor (54), having non-catalytic electrode, is positioned downstream of the converter (50) and its output voltage (Vo) monitored. Pumping current (Ip) is applied to an electrode of the non-catalytic sensor at a predetermined magnitude (IPREF) from a pumping current generator (56). When the output voltage (Vo) is detected at a predetermined high voltage range (302-318) an indication of degraded converter efficiency is provided (320).
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: March 12, 1996
    Assignee: Ford Motor Company
    Inventors: Alan D. Brailsford, Douglas R. Hamburg, Eleftherios M. Logothetis, Mohammed Yussouff