Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Patent
1997-04-11
1999-11-02
Lopez, F. Daniel
Power plants
Internal combustion engine with treatment or handling of...
By means producing a chemical reaction of a component of the...
60286, 60301, 60278, F01N 300
Patent
active
059747935
ABSTRACT:
In an exhaust gas purification device, a No. 1 cylinder of the engine is operated at a rich air-fuel ratio and other cylinders (No. 2 to No. 4) are operated at a lean air-fuel ratio. The exhaust gases from the No. 1 and No. 2 cylinders are mixed with each other to form a rich air-fuel ratio exhaust gas mixture. Further, since the air-fuel ratio of the No. 2 cylinder is lean, the exhaust gas from the No. 2 cylinder contains a relatively large amount of NO.sub.x. This rich air-fuel ratio exhaust gas mixture which contains a relatively large amount of NO.sub.X is supplied to a three-way catalyst. At the three-way catalyst, part of the NO.sub.X in the exhaust gas mixture is converted to NH.sub.3. The exhaust gas mixture flowing out from the three-way catalyst and the lean exhaust gas from the No. 3 and No. 4 flow into a common exhaust gas passage where they mix with each other to form a lean exhaust gas containing NH.sub.3 from the three-way catalyst and NO.sub.X from the No. 3 and No. 4 cylinders. This lean exhaust gas flows into a denitrating catalyst disposed on the common exhaust gas passage in which NO.sub.X in the exhaust gas is reduced by the NH.sub.3.
REFERENCES:
patent: 3767764 (1973-10-01), Dolbear
patent: 4395875 (1983-08-01), Virk
patent: 4467602 (1984-08-01), Iisuzka et al.
patent: 4854123 (1989-08-01), Inoue
patent: 5021227 (1991-06-01), Kobayashi et al.
patent: 5207058 (1993-05-01), Sasaki et al.
patent: 5367875 (1994-11-01), Aboujaoude et al.
patent: 5406790 (1995-04-01), Hirota et al.
patent: 5410873 (1995-05-01), Tashiro
patent: 5419121 (1995-05-01), Sung et al.
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: 5540047 (1996-07-01), Dahlheim et al.
patent: 5551231 (1996-09-01), Tanaka et al.
patent: 5605042 (1997-02-01), Stutzenberger
patent: 5609026 (1997-03-01), Berriman et al.
patent: 5628186 (1997-05-01), Schmelz
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: 5778667 (1998-07-01), Kinugasa et al.
patent: 5782087 (1998-07-01), Kinugasa et al.
patent: 5783160 (1998-07-01), Kinugasa et al.
patent: 5802845 (1998-09-01), Abe et al.
patent: 5826425 (1998-10-01), Sebastiano et al.
SAE 920469, "`Catalytic Engine` NO.sub.x Reduction of Diesel Engines with New Concept Onboard Ammonia Synthesis System", Masaaki Takiguchi, et al. May 14, 1992.
Fuwa Naohide
Itou Takaaki
Kinugasa Yukio
Suzuki Naoto
Takeuchi Koichi
Lopez F. Daniel
Toyota Jidosha & Kabushiki Kaisha
Tran Binh
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