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:
Mar. 04, 2008
Filed:
May. 11, 2006
Brian W. Mahnken, Pinckney, MI (US);
Santiago Santurtun, Toluca, MX;
Jeffrey M. Park, Farmington Hills, MI (US);
Brian W. Mahnken, Pinckney, MI (US);
Santiago Santurtun, Toluca, MX;
Jeffrey M. Park, Farmington Hills, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
The invention concerns diesel particulate filter regeneration in an exhaust system of a vehicle having a diesel engine. The particulate filter regeneration is selectively accomplished by actuating a particulate filter backpressure valve located downstream of the diesel particulate filter. Exhaust noise is attenuated for both normal driving and regeneration modes of operation by directing the exhaust flow through different flow paths in a muffler downstream of the diesel particulate filter.