Engine exhaust gas purification device

Details Engine exhaust gas purification device Engine exhaust gas purification device

1993-10-07

1995-04-11

Yeung, James C.

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60277, 60285, 60286, 60289, 123676, F01N 320

Patent

active

054047196

ABSTRACT:
An engine comprising an exhaust passage having therein an NO.sub.x absorbent which absorbs NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the No.sub.x absorbent is lean and releases absorbed NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent becomes rich. The temperature of the NO.sub.x absorbent is maintained within a predetermined range by injecting fuel into the exhaust gas when the temperature of the NO.sub.x absorbent drops, and by injecting air into the exhaust gas when the temperature of the NO.sub.x absorbent becomes high.

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No Removal by Absorption into BaO-CuO Binary Oxides (J. Chem. Soc., Chem. Commun., pp. 1165-1166).
Formation and Decomposition of BaCuO.sub.2.5 Prepared from a Mixture of Nitrates (Journal of Solid State Chemistry, pp. 176-179) (1991).
No Removal by Absorption into Ba-Cu-O Binary Oxides (67th CATSJ Meeting Abstracts: No. A9, Catalyst vol. 33 No. 2, pp. 87-90) (1991).

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