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:
Dec. 22, 2015
Filed:
Sep. 01, 2011
Andrew P. Bagnasco, Plymouth, MI (US);
Steven Ward Majors, Howell, MI (US);
Ian J. Macewen, White Lake, MI (US);
Scott Jeffrey, Hartland, MI (US);
Andrew P. Bagnasco, Plymouth, MI (US);
Steven Ward Majors, Howell, MI (US);
Ian J. MacEwen, White Lake, MI (US);
Scott Jeffrey, Hartland, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
Fueling to one cylinder of an engine is selectively adjusted based on a correction associated with the cylinder. An instability module increments a counter value when the correction is equal to one of a first predetermined value and a second predetermined value and was previously equal to the other one of the first and second predetermined values. The instability module selectively generates a first indicator based on the counter value. A variance of imbalance values can be determined based on samples of an exhaust gas oxygen signal. Two variances are determined: one variance with adjustment based on the correction, one without adjustment based on the correction. A variance checking module selectively generates a second indicator based on the first and second variances. A re-synchronization module re-synchronizes the imbalance values with the cylinders, respectively, in response to generation of the first indicator and/or the second indicator.