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:
Jan. 27, 2015
Filed:
Nov. 01, 2011
Stephen Paul Levijoki, Swartz Creek, MI (US);
Thomas J. Majcher, Orchard Lake, MI (US);
John W. Siekkinen, Novi, MI (US);
Michael John Dokter, Okemos, MI (US);
Scott Jeffrey, Hartland, MI (US);
Stephen Paul Levijoki, Swartz Creek, MI (US);
Thomas J. Majcher, Orchard Lake, MI (US);
John W. Siekkinen, Novi, MI (US);
Michael John Dokter, Okemos, MI (US);
Scott Jeffrey, Hartland, MI (US);
Abstract
A system according to the principles of the present disclosure includes an error period module and a sensor diagnostic module. The error period module determines an error period based on an amount of time that a first air/fuel ratio and a desired air/fuel ratio are different. A first oxygen sensor generates a first signal indicating the first air/fuel ratio. The sensor diagnostic module diagnoses a fault in the first oxygen sensor when the error period is greater than a predetermined period.