Apparatus for controlling exhaust concentration

Details Apparatus for controlling exhaust concentration Apparatus for controlling exhaust concentration

1992-05-14

1994-10-25

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60276, 60298, 60300, 60301, 60286, 60289, F01N 320

Patent

active

053577493

ABSTRACT:
A NOx reducing catalyst can most efficiently remove both NOx and HC when concentrations of NOx and HC in exhaust have a specified relationship between them. For this purpose, an apparatus is adapted to control the concentrations of NOx and HC at an upstream of a catalyst to have a specified relationship. Sensors for detecting the concentration of NOx and HC are arranged at an upstream side of the catalyst. Additionally, a device for levelling a quantity of HC discharge is disposed to suppress variation thereof.

REFERENCES:
patent: 3820327 (1974-06-01), Henault
patent: 3910042 (1975-10-01), Yuge
patent: 4297328 (1981-10-01), Ritscher
patent: 4870938 (1989-10-01), Nakaniwa
patent: 4964271 (1990-10-01), Sawada et al.
patent: 5083427 (1992-01-01), Anderson
"Catalytic NO.sub.x Reduction in Net Oxidizing Exhaust Gas", W. Held et al, SAE-Papers 1990, Paper No. 900496.
SAE Technical Paper Series, 920091. Feb. 1992.
Japanese Patent Unexamined Publication No. 2-91443 Mar. 1990.
Japanese Patent Unexamined Publication No. 58-59331 Apr. 1983.
Japanese Patent Unexamined Publication No. 1-203609 Aug. 1989.
Japanese Patent Unexamined Publication No. 1-262311 Oct. 1989.
Japanese Patent Unexamined Publication No. 3-74514 Mar. 1991.
Japanese Patent Unexamined Publication No. 3-124909 May 1991.
Japanese Patent Unexamined Publication No. 3-156142 Jul. 1991.

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