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:
Dec. 31, 2013
Filed:
May. 07, 2010
Applicants:
Alexander Knafl, Anacortes, WA (US);
Patrick G. Szymkowicz, Shelby Township, MI (US);
Inventors:
Alexander Knafl, Anacortes, WA (US);
Patrick G. Szymkowicz, Shelby Township, MI (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 9/00 (2006.01); F01N 3/035 (2006.01); F01N 3/10 (2006.01); F01N 3/023 (2006.01); F01N 3/02 (2006.01); F02M 25/07 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for operating an internal combustion engine configured to operate lean of stoichiometry includes reducing temperature of a portion of an exhaust gas feedstream recirculated to an intake system of the engine, and reducing mass flowrate of particulate matter and hydrocarbons borne in the recirculated portion of the exhaust gas feedstream upstream of the heat exchanger effective to reduce deposition of particulate matter and hydrocarbons onto and adhesion to surface areas of the heat exchanger.