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:
Jun. 22, 2021
Filed:
Mar. 19, 2019
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Eric Beatham, Livonia, MI (US);
Michiel J. Van Nieuwstadt, Ann Arbor, MI (US);
Allen Lehmen, Howell, MI (US);
Douglas Martin, Canton, MI (US);
Raymond Henry Berger, Canton, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F01N 11/00 (2006.01); F02D 41/24 (2006.01); B01D 37/04 (2006.01); F02D 41/02 (2006.01); F02D 41/00 (2006.01);
U.S. Cl.
CPC ...
F01N 11/002 (2013.01); F02D 41/2403 (2013.01); B01D 37/046 (2013.01); B01D 2201/54 (2013.01); F01N 2550/04 (2013.01); F01N 2560/07 (2013.01); F01N 2560/08 (2013.01); F01N 2900/0412 (2013.01); F01N 2900/0418 (2013.01); F01N 2900/0421 (2013.01); F02D 41/0002 (2013.01); F02D 41/0235 (2013.01);
Abstract
Methods and systems are provided for diagnosing a gasoline particulate filter in an engine exhaust passage. A pressure-flow relationship of the filter is learned in a low engine speed and high engine speed range. Degradation of the filter is identified based on a substantial separation between the curve fits at the high and low speed range.