Exhaust gas purifier for use in internal combustion engine

Details Exhaust gas purifier for use in internal combustion engine Exhaust gas purifier for use in internal combustion engine

2005-12-20

2005-12-20

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...

C060S276000, C060S285000, C060S277000

Reexamination Certificate

active

06976356

ABSTRACT:
When a NOx-releasing unit is operated to change an air-fuel ratio to a rich side to thereby establish a low-oxygen-concentration atmosphere of an exhaust gas such that NOx is released from a NOx catalyst, a reducer-supplying unit additionally supplies a reducer during an operating period of the NOx-releasing unit for reducing NOx released into an exhaust path such that release of NOx balances with reduction of NOx, thereby reducing NOx released from the NOx catalyst and thus suppressing worsening of an exhaust gas performance.

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