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. 14, 2006
Filed:
Oct. 14, 2003
Igor Anilovich, Walled Lake, MI (US);
David N. Belton, Birmingham, MI (US);
David A. Frank, Rochester Hills, MI (US);
Ian J. Mac Ewen, White Lake, MI (US);
Igor Anilovich, Walled Lake, MI (US);
David N. Belton, Birmingham, MI (US);
David A. Frank, Rochester Hills, MI (US);
Ian J. Mac Ewen, White Lake, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An engine diagnostic system includes a catalytic converter and an outlet Osensor. The outlet Osensor generates an outlet signal that is based on an oxygen level of exhaust gases exiting the catalytic converter. A controller adjusts a secondary fuel trim based on the outlet signal. The controller indicates a fault status if the secondary fuel trim has achieved a fuel trim limit and the outlet signal is out of a diagnostic range.