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. 05, 2017
Filed:
Oct. 30, 2015
Ford Global Technologies, Llc, Dearborn, MI (US);
John Eric Rollinger, Troy, MI (US);
Robert Roy Jentz, Westland, MI (US);
Michael Igor Kluzner, West Bloomfield, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
Methods and systems are described for monitoring air/fuel imbalance in cylinders of an engine. In one example method, air/fuel ratio of a cylinder is modulated to produce a series of rich, lean, and stoichiometric conditions in the cylinder and corresponding crank accelerations are measured to calculate a peak function indicating an air/fuel ratio in the cylinder. The peak function is calculated over a plurality of modulations to provide a more reliable computation of the air/fuel ratio of the cylinder and its deviation from a pre-determined air/fuel ratio.