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:
Sep. 29, 2015
Filed:
Nov. 08, 2012
GM Global Technology Operations Llc, Detroit, MI (US);
Stephen Paul Levijoki, Swartz Creek, MI (US);
Thomas J. Majcher, Orchard Lake, MI (US);
Scott Jeffrey, Hartland, MI (US);
John W. Siekkinen, Novi, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A system according to the principles of the present disclosure includes an error count module and a sensor diagnostic module. The error count module increases an error count when an actual air/fuel ratio is different from a desired air/fuel ratio and selectively adjusts the error count based on an actual engine speed. An oxygen sensor generates a signal indicating the actual air/fuel ratio. The sensor diagnostic module diagnoses a fault in the oxygen sensor when the error count is greater than a first predetermined count.