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Exhaust purification with on-board ammonia production

United States Patent

June 30, 2009
View the Complete Patent at the US Patent & Trademark Office
A power source is provided for use with selective catalytic reduction systems for exhaust-gas purification. The power source includes a first cylinder group with a first air-intake passage and a first exhaust passage, and a second cylinder group with a second air-intake passage and a second exhaust passage. The second air-intake passage is fluidly isolated from the first air-intake passage. A fuel-supply device may be configured to supply fuel into the first exhaust passage, and a catalyst may be disposed downstream of the fuel-supply device to convert at least a portion of the exhaust stream in the first exhaust passage into ammonia.
Robel; Wade J. (Peoria, IL), Driscoll; James J. (Dunlap, IL), Coleman; Gerald N. (Peterborough, GB), Knox; Kevin J. (Peoria, IL)
Caterpillar Inc. (Peoria, IL)
10/ 982,921
November 8, 2004
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.