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Exhaust purification with on-board ammonia production

United States Patent

May 13, 2008
View the Complete Patent at the US Patent & Trademark Office
A system of ammonia production for a selective catalytic reduction system is provided. The system includes producing an exhaust gas stream within a cylinder group, wherein the first exhaust gas stream includes NOx. The exhaust gas stream may be supplied to an exhaust passage and cooled to a predetermined temperature range, and at least a portion of the NOx within the exhaust gas stream may be converted into ammonia.
Robel; Wade J. (Peoria, IL), Driscoll; James Joshua (Dunlap, IL), Coleman; Gerald N. (Peterborough, GB)
Caterpillar Inc. (Peoria, IL)
11/ 216,359
August 31, 2005
U.S. GOVERNMENT RIGHTS This invention was made with government support under the terms of Contract No. DE-FC05-00OR22806 awarded by the Department of Energy. The government may have certain rights in this invention.