Device for purifying the exhaust gas of an internal...

Details Device for purifying the exhaust gas of an internal... Device for purifying the exhaust gas of an internal...

2007-11-20

2007-11-20

Nguyen, Tu M. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S287000, C060S288000, C060S297000, C060S295000, C422S169000, C422S171000

Reexamination Certificate

active

10829160

ABSTRACT:
A device for purifying the exhaust gas of an internal combustion engine is disclosed. The device includes a particulate filter arranged in the exhaust system, which carries a catalyst for absorbing and reducing NOx. The catalyst absorbs NOxwhen the air-fuel ratio in the surrounding atmosphere thereof is lean and releases the absorbed NOxto purify NOxby reduction when the air-fuel ratio is stoichiometric or rich. The device further includes a catalytic apparatus for purifying NOxarranged in the exhaust system upstream of the particulate filter, which has an oxidation function.

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