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:
May. 21, 2019
Filed:
Jun. 06, 2017
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Ethan D. Sanborn, Saline, MI (US);
Mark Thomas Linenberg, Pickney, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02D 41/14 (2006.01); F02D 41/22 (2006.01); F02D 41/30 (2006.01); F02D 19/06 (2006.01);
U.S. Cl.
CPC ...
F02D 41/1454 (2013.01); F02D 41/222 (2013.01); F02D 41/3094 (2013.01); F02D 19/0665 (2013.01); F02D 41/221 (2013.01);
Abstract
Methods and systems are provided for enabling a transfer function of a direct injector and a port injector, each fueling an engine cylinder, to be accurately learned. During selected conditions, the direct injected fuel fraction may be actively changed from a target fraction to one of an upper and lower limit of the direct injector so as to provide a measurable air-fuel ratio error. Fueling errors for the distinct fuel injectors is then learned based on the measured air-fuel ratio error relative to the actively changed fuel fraction.