05662869 is referenced by 30 patents and cites 20 patents.

An exhaust gas purification system includes an adsorbent containing an adsorbent element for adsorbing harmful compounds such as hydrocarbon in an exhaust gas and a catalyst containing a catalyst element for lowering the harmful compounds in the exhaust gas, each disposed in the exhaust gas pipe of an internal combustion engine. When an oxidizing gas is added to the exhaust gas or amounts of combustion gas and fuel are regulated, for a given period, in the process in which the hydrocarbon in the exhaust gas produced at the cold start-up of the internal combustion engine are adsorbed by the adsorbent and desorbed from the adsorbent as a temperature of the adsorbent is increased by the exhaust gas, an exhaust gas composition containing excessive oxygen is provided and the desorbed hydrocarbon are oxidized on the catalyst. With this arrangement, the harmful compounds in the exhaust gas, in particular, the hydrocarbon produced in a large amount at the cold start-up of the engine can be effectively purified.

Title
Exhaust gas purification method and apparatus therefor
Application Number
8784
Publication Number
5662869
Application Date
April 29, 1996
Publication Date
September 2, 1997
Inventor
Masato Ogawa
Komaki
JP
Junichi Suzuki
Kuwana
JP
Fumio Abe
Handa
JP
Agent
Parkhurst Wendel & Burr L
Assignee
NGK Insulators
JP
IPC
F01N 3/10
B01D 50/00
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