NOx decreasing apparatus for an internal combustion engine

Details NOx decreasing apparatus for an internal combustion engine NOx decreasing apparatus for an internal combustion engine

1993-09-10

1995-02-14

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60288, 60301, 60311, 422169, 423212, F01N 320

Patent

active

053884060

ABSTRACT:
In an exhaust purification apparatus of an internal combustion engine having an NOx absorption and release material in an exhaust conduit, a heater is provided close to the NOx absorption and release material. When an NOx absorption operation continues for a predetermined period, the heater is switched on to raise the temperature of the NOx absorption and release material above a predetermined temperature, for example, 500.degree. C. When the temperature of the NOx absorption and release material is high, the NOx absorption and release material releases absorbed NOx and is regenerated.

REFERENCES:
patent: 3795730 (1974-03-01), Kalvinskas
patent: 4944273 (1990-07-01), Baresel et al.
patent: 4985210 (1991-01-01), Minami
patent: 5184462 (1993-02-01), Schatz
"67th CATSJ Meeting Abstracts: No. A9", Partial Catalyst, vol. 33, No. 2, 1991, by Machida of Kyushu University.
"Formation and Decomposition of BaCuO.sub.2.5 Prepared from a Mixture of Nitrates", Journal of Solid State Chemistry, 1992, by Machida of Kyushu University.
"NO Removal by absorption into BAO-CuO Binary Oxides", J. Chem. Soc., Chem. Commun., 1990, by Machida of Kyushu University.
Abstract of PCT/JP92/01279 filed Oct. 2, 1992, published Apr. 15, 1993 for Device for Purifying Exhaust of Internal Combustion Engine.
Abstract of PCT/JP92/01330 filed Oct. 13, 1992, published Apr. 29, 1993, for Exhaust and Purification Device for Interanl Combustion Engine.

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