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Method of treating emissions of a hybrid vehicle with a hydrocarbon absorber and a catalyst bypass system

United States Patent

January 14, 2014
View the Complete Patent at the US Patent & Trademark Office
A method of treating emissions from an internal combustion engine of a hybrid vehicle includes directing a flow of air created by the internal combustion engine when the internal combustion engine is spinning but not being fueled through a hydrocarbon absorber to collect hydrocarbons within the flow of air. When the hydrocarbon absorber is full and unable to collect additional hydrocarbons, the flow of air is directed through an electrically heated catalyst to treat the flow of air and remove the hydrocarbons. When the hydrocarbon absorber is not full and able to collect additional hydrocarbons, the flow of air is directed through a bypass path that bypasses the electrically heated catalyst to conserve the thermal energy stored within the electrically heated catalyst.
Roos; Bryan Nathaniel (West Bloomfield, MI), Gonze; Eugene V. (Pinckney, MI), Santoso; Halim G. (Novi, MI), Spohn; Brian L. (Holly, MI)
GM Global Technology Operations LLC (Detroit, MI)
13/ 196,263
August 2, 2011
RELATED GOVERNMENT CONTRACTS This invention was made with United States Government support under Agreement No. DE-FC26-08NT04386, A000 awarded by the Department of Energy, Project No: vss018. The U.S. Government may have certain rights in this invention.