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. 22, 2018
Filed:
Jan. 24, 2017
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Robert Roy Jentz, Westland, MI (US);
Scott Steadmon Thompson, Sterling Heights, MI (US);
Pat Edward Smithberger, Howell, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02M 26/49 (2016.01); F02M 26/04 (2016.01); F02D 41/00 (2006.01); F02D 41/26 (2006.01);
U.S. Cl.
CPC ...
F02M 26/49 (2016.02); F02D 41/005 (2013.01); F02D 41/0007 (2013.01); F02D 41/26 (2013.01); F02M 26/04 (2016.02); F02D 2200/022 (2013.01); F02D 2200/101 (2013.01);
Abstract
Methods and systems are provided for on-board diagnostics of an exhaust gas recirculation system. In one example, a method may include dynamically estimating upper and lower EGR limits based on a commanded EGR flow and estimating a ratio of accumulated difference between a measured EGR flow and one of the upper and lower EGR limits to accumulated commanded EGR flow, over a duration of time. EGR system degradation may be indicated in response to the ratio being higher than a threshold.