Exhaust gas purification device

Details Exhaust gas purification device Exhaust gas purification device

2011-03-22

2011-03-22

Tran, Binh Q (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S295000, C060S297000, C060S301000, C060S303000

Reexamination Certificate

active

07908843

ABSTRACT:
An exhaust gas purification device comprises a NOx catalyst for purifying NOx contained in exhaust gas by using ammonia as a reducing agent, an ammonia supply device for supplying ammonia to the NOx catalyst, a catalyst temperature sensor for detecting the internal temperature of the NOx catalyst, and a control unit that stops the ammonia supply from the ammonia supply device when the stop condition is satisfied that the internal temperature of the NOx catalyst becomes equal to or higher than first prescribed temperature in the process where ammonia is supplied from the ammonia supply device to the NOx catalyst.

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Notification of Reasons for Rejection issued in corresponding Japanese Patent Application No. 2005-356147 dated Jun. 2, 2010.

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