System and method for particulate filter regeneration

US9046019B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Thomas Larose, Jr. · Howell, US
• David M. Van Buren · Fond du Lac, US
• John A. Catalogna · Wixom, US
• Christopher Whitt · Howell, US
• Rebecca J. Darr · Milford, US

Key dates

• Filing date: Nov 4, 2011
• Grant date: Jun 2, 2015
• Expiry date: Sep 18, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Environmental technology
• WIPO sector: Chemistry

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.