Small-volume NO x adsorber

Details Small-volume NO x adsorber Small-volume NO x adsorber

2007-02-20

2007-02-20

Johnson, Edward M. (Department: 1754)

Catalyst, solid sorbent, or support therefor: product or process

Solid sorbent

C423S239100

Reexamination Certificate

active

10426525

ABSTRACT:
A support body is described which has an adsorber material for adsorbing nitrogen oxides in an exhaust gas which is generated in at least one combustion chamber of an internal-combustion engine. A method is described for operating an internal-combustion engine having an exhaust system which has a support body of this type. All the combustion chambers of the internal-combustion engine together have an overall combustion chamber volume, and the support body has an adsorber volume. The adsorber volume is configured to be less than 75%, in particular less than 45%, and preferably even less than 5% of the combustion-chamber volume. A support body of this type ensures a good cold-starting performance of the exhaust system and prevents the emission of nitrogen oxides, in particular when using the proposed method of operating the exhaust system.

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