Exhaust emission purification device for internal combustion...

Details Exhaust emission purification device for internal combustion... Exhaust emission purification device for internal combustion...

2006-01-24

2006-01-24

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...

C060S289000, C060S292000, C060S295000, C060S297000, C060S303000, C060S324000

Reexamination Certificate

active

06988360

ABSTRACT:
An exhaust emission purification device comprises a sulfur component holding agent arranged on the exhaust path of an internal combustion engine for holding a sulfur component, a NOxholding agent arranged downstream of the sulfur component holding agent in the exhaust gas for holding NOxand the sulfur components when the air-fuel ratio of the exhaust gas flowing thereinto is lean, and a reducing agent adding unit for adding a reducing agent to the exhaust gas flowing into the NOxholding agent. The concentration of the sulfur component contained in the reducing agent added by the reducing agent adding unit is lower than the concentration of at least the sulfur component contained in the fuel supplied to the combustion chamber of the internal combustion engine. Thus, the sulfur poisoning of the exhaust emission purifier can be avoided while at the same time reducing the fuel consumption rate.

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