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Two phase exhaust for internal combustion engine

United States Patent

November 29, 2011
View the Complete Patent at the US Patent & Trademark Office
An internal combustion engine having a reciprocating multi cylinder internal combustion engine with multiple valves. At least a pair of exhaust valves are provided and each supply a separate power extraction device. The first exhaust valves connect to a power turbine used to provide additional power to the engine either mechanically or electrically. The flow path from these exhaust valves is smaller in area and volume than a second flow path which is used to deliver products of combustion to a turbocharger turbine. The timing of the exhaust valve events is controlled to produce a higher grade of energy to the power turbine and enhance the ability to extract power from the combustion process.
Vuk; Carl T. (Denver, IA)
Deere & Company (Moline, IL)
12/ 045,390
March 10, 2008
This invention was made with Government support under contract DE-FC26-05NT42422 awarded by the Department of Energy. The United States Government has certain rights in this invention.