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:
Sep. 01, 2009
Filed:
Oct. 09, 2008
Applicant:
Robert J. Moran, Ann Arbor, MI (US);
Inventor:
Robert J. Moran, Ann Arbor, MI (US);
Assignee:
GM Global Technology Operations, Inc., Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B 47/08 (2006.01); F02B 47/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
An exhaust gas recirculation system for an engine provides three modes of operation. In a bypass mode, exhaust gas bypasses a heat exchanger. In a single pass mode of operation, exhaust gas flows through the heat exchanger passageways. In a dual pass mode of operation, exhaust gas flows through the heat exchanger passageways in a manner that provides a longer effective flow length through the heat exchanger compared to the single pass mode, thereby to increase cooling efficacy.