Exhaust gas purification apparatus of internal combustion...

Details Exhaust gas purification apparatus of internal combustion... Exhaust gas purification apparatus of internal combustion...

2006-08-22

2006-08-22

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...

C060S286000, C060S295000, C060S297000, C060S303000, C422S171000, C422S177000

Reexamination Certificate

active

07093432

ABSTRACT:
An exhaust gas purification apparatus for use in an internal combustion engine comprises an exhaust gas duct connected to the engine through which the exhaust gas containing NOx gas passes and a catalyst so disposed in the exhaust gas duct that it contacts with the exhaust gas.The catalyst chemically adsorbs NOx under the condition that a stoichiometric amount of a gaseous oxidizing agent present in the exhaust gas is larger than that of a gaseous reducing agent present in the exhaust gas for reducing NOx, while NOx being adsorbed is catalytically reduced in the presence of the reducing agent under the condition that the stoichiometric amount of the oxidizing agent is not larger that of the reducing agent.Thereby, NOx, the lean burn exhaust gas in the engine can be effectively made harmlessly.

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