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Waste heat recovery system for recapturing energy after engine aftertreatment systems

United States Patent

June 17, 2014
View the Complete Patent at the US Patent & Trademark Office
The disclosure provides a waste heat recovery (WHR) system including a Rankine cycle (RC) subsystem for converting heat of exhaust gas from an internal combustion engine, and an internal combustion engine including the same. The WHR system includes an exhaust gas heat exchanger that is fluidly coupled downstream of an exhaust aftertreatment system and is adapted to transfer heat from the exhaust gas to a working fluid of the RC subsystem. An energy conversion device is fluidly coupled to the exhaust gas heat exchanger and is adapted to receive the vaporized working fluid and convert the energy of the transferred heat. The WHR system includes a control module adapted to control at least one parameter of the RC subsystem based on a detected aftertreatment event of a predetermined thermal management strategy of the aftertreatment system.
Ernst; Timothy C. (Columbus, IN), Nelson; Christopher R. (Columbus, IN)
Cummins Intellectual Properties, Inc. (Minneapolis, MN)
13/ 206,386
August 9, 2011
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with government support under "Exhaust Energy Recovery," contract number DE-FC26-05NT42419 awarded by the Department of Energy (DOE). The government has certain rights in the invention.