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:
Jul. 02, 2019
Filed:
Jun. 14, 2016
Ford Global Technologies, Llc, Dearborn, MI (US);
Hassene Jammoussi, Canton, MI (US);
Imad Hassan Makki, Dearborn Heights, MI (US);
Michael Igor Kluzner, West Bloomfield, MI (US);
Gopichandra Surnilla, West Bloomfield, MI (US);
Robert Roy Jentz, Westland, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
Methods and systems include determining a cylinder air-fuel ratio imbalance in a multi-cylinder engine. In one example, the method may include sequentially firing an engine cylinder to provide an expected air-fuel deviation and learning cylinder air-fuel ratio imbalance based on an error between an actual air-fuel ratio deviation from a maximum lean air-fuel ratio relative to an expected air-fuel deviation during a deceleration fuel shut-off event.