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. 02, 2015
Filed:
Nov. 04, 2011
Thomas Larose, Jr., Howell, MI (US);
David Michael Van Buren, Livonia, MI (US);
John A. Catalogna, Commerce Township, MI (US);
Christopher Whitt, Howell, MI (US);
Rebecca J. Darr, Milford, MI (US);
Thomas Larose, Jr., Howell, MI (US);
David Michael Van Buren, Livonia, MI (US);
John A. Catalogna, Commerce Township, MI (US);
Christopher Whitt, Howell, MI (US);
Rebecca J. Darr, Milford, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
In one exemplary embodiment of the invention, a method of regenerating a particulate filter includes flowing an exhaust gas from an internal combustion engine into a particulate filter and determining a particulate level in the particulate filter. The method also includes performing a primary regeneration when the particulate level is below a first value, the primary regeneration including flowing exhaust gas with a selected amount of hydrocarbons in the exhaust gas into the particulate filter, and performing a secondary regeneration when the particulate level is above the first value, the secondary regeneration including flowing exhaust gas with an increased amount of nitrogen oxide into the particulate filter.