05461857 is referenced by 25 patents and cites 11 patents.

An exhaust gas purification device comprising a three way catalyst, an oxidizing catalyst and a NOx absorbent which are arranged in this order in the exhaust passage. A rich air-fuel mixture is burned in the combustion chamber, and the exhaust gas discharged from the engine is initially introduced into the three way catalyst. Secondary air is fed into the exhaust passage between the three way catalyst and the oxidizing catalyst so that the air-fuel ratio of the exhaust gas flowing into the oxidizing catalyst and the NOx absorbent becomes lean.

Title
Engine exhaust gas purification device
Application Number
8/259751
Publication Number
5461857
Application Date
June 10, 1994
Publication Date
October 31, 1995
Inventor
Toshio Tanahashi
Susono
JP
Kazuhisa Kunitake
Susono
JP
Hidemi Ohnaka
Susono
JP
Keiso Takeda
Mishima
JP
Hiroshi Tanaka
Susono
JP
Takaaki Itou
Mishima
JP
Agent
Kenyon & Kenyon
Assignee
Toyota Jidosha Kabushiki Kaisha
JP
IPC
F01N 3/22
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