Engine system arrangement with on-board ammonia production...

Details Engine system arrangement with on-board ammonia production... Engine system arrangement with on-board ammonia production...

2005-10-03

2009-10-27

Denion, Thomas E (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S288000, C060S295000, C060S301000

Reexamination Certificate

active

07607291

ABSTRACT:
An engine system includes first and second combustion chamber groups that supply exhaust to respective first and second exhaust passages. NOx in the exhaust of the first combustion group is converted to ammonia, such as by enriching the exhaust with fuel and then passing the mixture over an appropriate catalyst. Particles are trapped and continuously oxidized through appropriate placement of one or more particle traps coated with an appropriate oxidizing catalyst. NOx in the second passage from the second combustion group is combined with ammonia produced in the first passage and converted to nitrogen and water in a merged passage before being vented to atmosphere. This conversion is accomplished by passing the merged exhaust over an appropriate selective catalytic reduction catalyst.

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Hamada, Kato, Imada, Kikkawa and Yamada; A Unique Titania-Based SCR NOx Catalyst For Diesel Exhaust Emission Control; Apr. 2005; pp. 1-7; SAE International; Detriot, Michigan.
Ogunwumi, Fox, Patil and He; In-Situ NH3Generation For SCR NOxApplications; Oct. 2002; pp. 1-6; SAE International; San Diego, California.

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