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:
Nov. 10, 2015
Filed:
Oct. 11, 2013
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Gopichandra Surnilla, West Bloomfield, MI (US);
Richard E. Soltis, Saline, MI (US);
James Alfred Hilditch, Canton, MI (US);
Timothy Joseph Clark, Livonia, MI (US);
Matthew John Gerhart, Dearborn Heights, MI (US);
Todd Anthony Rumpsa, Saline, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
F02M 25/06 (2006.01); F02B 33/44 (2006.01); F02B 47/08 (2006.01); F02M 25/07 (2006.01); F02D 41/00 (2006.01); F02D 41/14 (2006.01); F02D 41/24 (2006.01); F02M 25/08 (2006.01); F02D 41/08 (2006.01); F02D 41/12 (2006.01);
U.S. Cl.
CPC ...
F02D 41/0052 (2013.01); F02D 41/0072 (2013.01); F02D 41/144 (2013.01); F02D 41/2445 (2013.01); F02D 41/2474 (2013.01); F02M 25/0702 (2013.01); F02M 25/089 (2013.01); F02D 41/08 (2013.01); F02D 41/123 (2013.01); F02D 2041/141 (2013.01); F02D 2200/0418 (2013.01); F02M 25/06 (2013.01); F02M 25/0711 (2013.01);
Abstract
Methods and systems are provided for accurately learning the zero point of an intake gas oxygen sensor during selected idling 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 an idle adaptation relative to a zero point learned during a DFSO adaptation.