Power plants – Internal combustion engine with treatment or handling of... – Material from exhaust structure fed to engine intake
Patent
1978-06-20
1980-08-05
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Material from exhaust structure fed to engine intake
60293, 60301, F01N 315, F02M 2506
Patent
active
042155401
ABSTRACT:
An exhaust gas purifying apparatus, for use in an automobile multi-cylinder engine of the type which has exhaust port ducts leading from engine cylinders and through which exhaust gases are emitted subsequent to combustion of an air-fuel mixture, the exhaust gas purifying apparatus having a reducing catalyst unit and an oxidizing catalyst unit disposed in a main exhaust manifold which is corrected on one side, to a first group of the exhaust port ducts and, on the other side to the atmosphere, an auxiliary exhaust manifold is connected, on one side to a second group of the exhaust port ducts and on the other side to a portion of the main exhaust manifold which is downstream from the reducing catalyst unit and upstream of the oxidizing catalyst unit. A pressure operated valve is disposed on a secondary air supply passage for introducing secondary air into the auxiliary exhaust manifold by the utilization of a pulsating flow of the exhaust gases through the auxiliary exhaust manifold, and an exhaust gas recirculating system extending between the main exhaust manifold to an intake system of the engine.
REFERENCES:
patent: 3767764 (1973-10-01), Dolbear
patent: 3984975 (1976-10-01), Price
patent: 4069666 (1978-01-01), Nakamura
patent: 4100734 (1978-07-01), Ozaki
Kobayashi Kazuo
Nakazumi Tadataka
Oda Tatsuro
Tanaka Kazuyuki
Hart Douglas
Toyo Kogyo Co. Ltd.
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