Engine exhaust gas purification device

Details Engine exhaust gas purification device Engine exhaust gas purification device

1994-06-10

1995-10-31

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60289, 60306, 60279, F01N 322

Patent

active

054618576

ABSTRACT:
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.

REFERENCES:
patent: 4231220 (1980-11-01), Takeda
No Removal by Absorption into BaO-CuO Binary Oxides, Masato Machida, et al., J. Chem. Soc., Chem. Commun., 1990, pp. 1165-1166.
Formation and Decomposition of BaCuO.sub.2.5 Prepared from a Mixture of Nitrates, Masato Machida, et al., Journal of Solid State Chemistry, pp. 176-179.
No Removal by Absorption into Ba-Cu-O Binary Oxides, Masato Machida, et al., Catalyst, vol. 33, No. 2, pp. 87-90.

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