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:
Jan. 19, 2016
Filed:
Jan. 26, 2012
Applicants:
Christine Kay Lambert, Dearborn, MI (US);
Martyn Vincent Twigg, Caxton, GB;
Inventors:
Christine Kay Lambert, Dearborn, MI (US);
Martyn Vincent Twigg, Caxton, GB;
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/00 (2006.01); F02D 19/06 (2006.01); F01N 3/021 (2006.01); F02D 41/02 (2006.01); F02D 41/12 (2006.01); F02B 75/12 (2006.01); F02D 41/00 (2006.01);
U.S. Cl.
CPC ...
F02D 19/0655 (2013.01); F01N 3/021 (2013.01); F02D 41/029 (2013.01); F02D 41/12 (2013.01); F01N 2330/02 (2013.01); F01N 2330/22 (2013.01); F02B 2075/125 (2013.01); F02D 19/0642 (2013.01); F02D 41/0025 (2013.01); F02D 2200/0611 (2013.01); F02D 2200/0812 (2013.01); F02D 2200/0814 (2013.01); Y02T 10/123 (2013.01); Y02T 10/20 (2013.01); Y02T 10/22 (2013.01); Y02T 10/36 (2013.01);
Abstract
Methods and systems are provided for passive regeneration of a particulate matter filter coupled to a gasoline engine. During vehicle deceleration conditions, an engine is operated leaner than stoichiometry over two subsequent lean phases, including an initial longer and leaner phase followed by a shorter and less lean phase. By passively regenerating the filter using intermittent lean engine operation, engine performance can be improved.