NOx adsorber aftertreatment system for internal combustion...

Details NOx adsorber aftertreatment system for internal combustion... NOx adsorber aftertreatment system for internal combustion...

2006-10-10

2006-10-10

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S288000, C060S297000, C060S301000, C060S303000, C060S311000

Reexamination Certificate

active

07117667

ABSTRACT:
The present invention provides for an NOx adsorber aftertreatment system for internal combustion engines which utilizes a parallel arrangement of an adsorber catalyst and a bypass. The exhaust flow from the engine is routed through the adsorber during lean operation. At a predetermined regeneration time (for example, when the adsorber catalyst is 20% full), the exhaust gas flow is reduced through the parallel leg that contains the adsorber catalyst to be regenerated (e.g., 20% through the catalyst leg, 80% of the flow to the bypass leg). A quantity of hydrocarbon is injected into the reduced-flow catalyst leg in order to make the mixture rich. Since the flow has been reduced in this leg, only a small fraction of the amount of hydrocarbon that would have been required to make the mixture rich during full flow is required. This will result in a substantial reduction in the fuel penalty incurred for regeneration of the adsorber catalyst. Once the leg has been regenerated, the exhaust flow is switched to flow 100% through the adsorber leg.

REFERENCES:
patent: 5085049 (1992-02-01), Rim et al.
patent: 5406790 (1995-04-01), Hirota et al.
patent: 5613359 (1997-03-01), Zahn et al.
patent: 5910097 (1999-06-01), Boegner et al.
patent: 5974791 (1999-11-01), Hirota et al.
patent: 6023929 (2000-02-01), Ma
patent: 6105365 (2000-08-01), Deeba et al.
patent: 6170259 (2001-01-01), Boegner et al.
patent: 6233927 (2001-05-01), Hirota et al.
patent: 6293096 (2001-09-01), Khair et al.
patent: 6318073 (2001-11-01), Boegner et al.
patent: 6502391 (2003-01-01), Hirota et al.
patent: 60-045711 (1985-03-01), None
patent: 6-33735 (1994-02-01), None

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