Exhaust emission control apparatus for internal combustion...

Details Exhaust emission control apparatus for internal combustion... Exhaust emission control apparatus for internal combustion...

2006-09-26

2006-09-26

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...

C060S274000, C060S286000, C060S295000, C060S297000

Reexamination Certificate

active

07111456

ABSTRACT:
In an exhaust emission control apparatus having an NOx catalyst disposed on an exhaust passage of an internal combustion engine, the present invention is intended to suppress deterioration in exhaust emissions when the temperature of the NOx catalyst is raised. In case where the temperature of the NOx catalyst need be raised, an amount of nitrogen oxides occluded in the NOx catalyst is decreased in advance to the raising of the temperature of the NOx catalyst, whereby the amount of nitrogen oxides to be discharged from the NOx catalyst upon raising the temperature of the NOx catalyst can be decreased.

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