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Highly efficient 6-stroke engine cycle with water injection

United States Patent

October 23, 2012
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A six-stroke engine cycle having improved efficiency. Heat is recovered from the engine combustion gases by using a 6-stroke engine cycle in which combustion gases are partially vented proximate the bottom-dead-center position of the fourth stroke cycle, and water is injected proximate the top-dead-center position of the fourth stroke cycle.
Szybist; James P. (Knoxville, TN), Conklin; James C. (Knoxville, TN)
UT-Battelle, LLC (Oak Ridge, TN)
12/ 483,388
June 12, 2009
GOVERNMENT RIGHTS This invention was made with government support under Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.