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Exhaust bypass flow control for exhaust heat recovery

United States Patent

September 22, 2015
View the Complete Patent at the US Patent & Trademark Office
An exhaust system for an engine comprises an exhaust heat recovery apparatus configured to receive exhaust gas from the engine and comprises a first flow passage in fluid communication with the exhaust gas and a second flow passage in fluid communication with the exhaust gas. A heat exchanger/energy recovery unit is disposed in the second flow passage and has a working fluid circulating therethrough for exchange of heat from the exhaust gas to the working fluid. A control valve is disposed downstream of the first and the second flow passages in a low temperature region of the exhaust heat recovery apparatus to direct exhaust gas through the first flow passage or the second flow passage.
Reynolds; Michael G. (Troy, MI)
GM Global Technology Operations LLC (Detroit, MI)
12/ 752,648
April 1, 2010
FEDERAL RESEARCH STATEMENT This invention was made with U.S. Government support under Agreement No. DE-FC26-04NT42278, awarded by the Department of Energy. The U.S. Government may have certain rights in this invention.