Exhaust gas purifying system for engines

Details Exhaust gas purifying system for engines Exhaust gas purifying system for engines

1977-07-26

1980-03-11

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

60301, 60306, F01N 315

Patent

active

041921410

ABSTRACT:
A system for purifying exhaust gases of engines by first passing the exhaust gases through a 3-way catalyst in a reducing condition, and secondly through an auxiliary catalyst which accelerates at least the oxidizing reaction in an oxidizing condition, wherein the reducing and oxidizing conditions of the exhaust gases are controlled by a programmed supply of secondary air to the exhaust gases at the upstream sides of the two catalysts, the program for the supply of secondary air being predetermined depending upon operational conditions of the engine, such as the rotational speed and the intake manifold vaccum of the engine.

REFERENCES:
patent: 3812673 (1974-05-01), Muroki
patent: 3826089 (1974-07-01), Nakajima
patent: 3869858 (1975-03-01), Goto
patent: 3886260 (1975-05-01), Unland
patent: 3906723 (1975-09-01), Matumoto
patent: 3921396 (1975-11-01), Nohira
patent: 4125997 (1978-11-01), Abthoff
patent: 4134262 (1979-01-01), Sugihara

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