Patents by Inventor Stephen B. Zulczyk

Stephen B. Zulczyk 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 apparatus for inferring engine oil temperature for use with an oil change indicator
    Patent number: 5633796
    Abstract: An electronic engine controller infers the instantaneous temperature of lubricating oil in an engine by determining a steady state oil temperature value as a function of engine speed and aircharge, determining an oil temperature time constant as a function of mass air flow rate and determining the instantaneous oil temperature as a function of the steady state oil temperature and the oil temperature time constant. The engine controller also determines an oil change interval as a function of the inferred oil temperature and the number of engine revolutions.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: May 27, 1997
    Assignee: Ford Motor Company
    Inventors: Michael J. Cullen, Stephen B. Zulczyk