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:
Feb. 20, 2018
Filed:
May. 02, 2016
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Timothy Joseph Clark, Livonia, MI (US);
Gopichandra Surnilla, West Bloomfield, MI (US);
Matthew John Gerhart, Dearborn Heights, MI (US);
Daniel Joseph Styles, Canton, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02B 33/44 (2006.01); F02N 3/00 (2006.01); F02B 47/10 (2006.01); F02M 25/07 (2006.01); F02D 41/24 (2006.01); F02M 26/08 (2016.01); F02M 26/40 (2016.01); F02D 41/00 (2006.01); F02D 41/08 (2006.01); F02D 41/12 (2006.01); F02D 41/14 (2006.01); F02M 26/49 (2016.01);
U.S. Cl.
CPC ...
F02D 41/2474 (2013.01); F02D 41/0052 (2013.01); F02D 41/0072 (2013.01); F02D 41/08 (2013.01); F02D 41/123 (2013.01); F02D 41/144 (2013.01); F02D 41/2445 (2013.01); F02M 26/08 (2016.02); F02M 26/40 (2016.02); F02M 26/49 (2016.02); F02D 2041/141 (2013.01); Y02T 10/47 (2013.01);
Abstract
Methods and systems are provided for accurately learning the zero point of an intake gas oxygen sensor during selected engine no-fueling conditions. The learned zero point is used to infer EGR flow and accordingly adjust EGR valve control. In addition, EGR valve leakage is diagnosed based on the zero point learned during a DFSO adaptation relative to a zero point learned during an idle adaptation.