APPARATUS AND METHOD FOR CLARIFYING EXHAUST GAS OF DIESEL ENGINE

WIPO Patent Application WO/2004/018850

A1

An apparatus for clarifying an exhaust gas of a diesel engine, characterized in that it has an NOx adsorption and reduction type catalyst and a diesel particulate filter for oxidizing and removing particulate matters in the exhaust gas, which are provided in the flow route for the exhaust gas and are arranged in the above described order from the upstream of the flow of the exhaust gas. The above arrangement allows the elevation of the temperature of the catalyst with ease and the precise control of the temperature and atmosphere therein, resulting in the achievement of satisfactory NOx clarification performance, and the employment of the NOx adsorption and reduction type catalyst allows the enhancement of the rate of reduction of the NO₂ captured, which shortens the time to keep a stoichiometric-rich atmosphere to a time of several seconds to several minutes.

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KAMIKAWA MASAYUKI (JP)
IIZUKA HIDEHIRO (JP)
KANEEDA MASATO (JP)
HIGASHIYAMA KAZUTOSHI (JP)
KITAHARA YUICHI (JP)
KURODA OSAMU (JP)

PCT/JP2003/010751

March 04, 2004

August 26, 2003

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HITACHI LTD (JP)
KAMIKAWA MASAYUKI (JP)
IIZUKA HIDEHIRO (JP)
KANEEDA MASATO (JP)
HIGASHIYAMA KAZUTOSHI (JP)
KITAHARA YUICHI (JP)
KURODA OSAMU (JP)

B01D53/94; F01N3/02; F01N3/023; F01N3/027; F01N3/035; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N9/00; F02D41/02; F02D41/30; F02D41/38; F01N13/02; F02D41/14; (IPC1-7): F01N3/08; F01N3/02; F01N3/24

JP2002129950A	2002-05-09
JPH0374561A	1991-03-29
JPH0487332U	1992-07-29
JP2001050033A	2001-02-23

Hiraki, Yusuke (3-20 Toranomon 4-chom, Minato-ku Tokyo, JP)

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