Device for purifying exhaust gas of engine

Details Device for purifying exhaust gas of engine Device for purifying exhaust gas of engine

1997-03-19

1999-10-12

Look, Edward K.

Power plants

Internal combustion engine with treatment or handling of...

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

60303, 60285, F01N 300

Patent

active

059640880

ABSTRACT:
A device for purifying the exhaust gas of an engine having a plurality of cylinders divided into first and second cylinder groups, the first and the second cylinder groups being connected to first and second exhaust passage, respectively, and performing a lean operation, comprises an NH.sub.3 synthesizing catalyst arranged in the first exhaust passage, and an exhaust gas purifying catalyst arranged in an interconnecting passage, which interconnects the first passage downstream of the NH.sub.3 synthesizing catalyst and the second exhaust passage, for purifying the inflowing NO.sub.X and NH.sub.3. An additional engine performing a rich operation is provided and the exhaust gas thereof is fed to the first exhaust gas passage upstream of the NH.sub.3 synthesizing catalyst to make the exhaust gas air-fuel ratio of the exhaust gas flowing into the NH.sub.3 synthesizing catalyst rich, to thereby synthesize NH.sub.3 therein. An amount of NH.sub.3 or NO.sub.X flowing into the exhaust gas purifying catalyst is obtained, and the additional engine is controlled in accordance with the obtained NH.sub.3 or NO.sub.X amount to control the amount of the reducing agent flowing to the exhaust gas purifying catalyst.

REFERENCES:
patent: 4395875 (1983-08-01), Virk
patent: 5207058 (1993-05-01), Sasaki et al.
patent: 5410873 (1995-05-01), Tashiro
patent: 5461857 (1995-10-01), Itou et al.
patent: 5473887 (1995-12-01), Takeshima et al.
patent: 5479775 (1996-01-01), Kraemer et al.
patent: 5551231 (1996-09-01), Tanaka et al.
patent: 5657625 (1997-08-01), Koga et al.
patent: 5661971 (1997-09-01), Waschatz et al.
patent: 5740669 (1998-04-01), Kinugasa et al.
patent: 5746052 (1998-05-01), Kinugasa et al.
patent: 5758493 (1998-06-01), Asik et al.
patent: 5778667 (1998-07-01), Kinugasa et al.
patent: 5782087 (1998-07-01), Kinugasa et al.
patent: 5783160 (1998-07-01), Kinugasa et al.
patent: 5826425 (1998-10-01), Sebastiano et al.
Patent Abstracts of Japan, vol. 096, No. 005, May 31, 1996 & JP 08 004522 A (Hitachi, LTD., Others), Jan. 9, 1996.
Patent Abstracts of Japan, vol. 017, No. 240 (M-1409), May 14, 1993 & JP 04 365920 A (Toyota Central Res & Dev Lab), Dec. 17, 1992.
Database WPI, Section Ch, Week 9711, Derwent Publications Ltd., London, CB; Class E36, AN 97-116490 XP002032100 & JP 09 004 441 A (Mitsubishi Motor Corp), Jan. 7, 1997.

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