05315824 is referenced by 67 patents and cites 4 patents.

An HC adsorbent and a first three-way or oxidation catalyst are installed in an exhaust conduit of an internal combustion engine in that order in a flow direction. A second three-way or oxidation catalyst is installed upstream of the HC adsorbent in the exhaust conduit. When the exhaust gas flows through the second catalyst, the thermal energy of the exhaust gas is compensated for warming-up the second catalyst in a cold period. As a result, the warming-up of the HC adsorbent is delayed and the HC adsorbent can adsorb the HC included in the exhaust gas for a relatively long period. After the second catalyst has been warmed-up, the HC included in the exhaust gas flowing into the HC adsorbent is oxidized. As a result, the HC adsorbent is prevented from being saturated for a short period of time.

Title
Cold HC adsorption and removal apparatus for an internal combustion engine
Application Number
7/936966
Publication Number
5315824
Application Date
August 28, 1992
Publication Date
May 31, 1994
Inventor
Shinichi Takeshima
Susono
JP
Agent
Kenyon & Kenyon
Assignee
Toyota Jidosha Kabushiki Kaisha
JP
IPC
F01N 3/28
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