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:
Oct. 25, 2005
Filed:
Jul. 22, 2003
Applicants:
Igor Anilovich, Walled Lake, MI (US);
Thomas L. Ting, Troy, MI (US);
Inventors:
Igor Anilovich, Walled Lake, MI (US);
Thomas L. Ting, Troy, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N027/00 ;
U.S. Cl.
CPC ...
Abstract
An engine exhaust sensor diagnostic system includes an oxygen sensor and a controller. The controller monitors a signal generated by the oxygen sensor, determines a rate of change of the signal, and computes diagnostic parameters. The controller indicates malfunction of the oxygen sensor if the diagnostic parameters are smaller in magnitude than corresponding thresholds.