The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 17, 2015
Filed:
Jan. 18, 2012
Imad Hassan Makki, Dearborn Heights, MI (US);
James Michael Kerns, Trenton, MI (US);
Michael Casedy, Ann Arbor, MI (US);
Hassene Jammoussi, Houston, TX (US);
Imad Hassan Makki, Dearborn Heights, MI (US);
James Michael Kerns, Trenton, MI (US);
Michael Casedy, Ann Arbor, MI (US);
Hassene Jammoussi, Houston, TX (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A method of monitoring an exhaust gas sensor coupled in an engine exhaust is provided. The method comprises indicating exhaust gas sensor degradation based on a difference between a first set of estimated parameters of a rich operation model and a second set of estimated parameters of a lean operation model, the estimated parameters based on commanded lambda and determined lambda values collected during selected operating conditions. In this way, sensor degradation may be indicated with data collected in a non-intrusive manner.