Power plants – Internal combustion engine with treatment or handling of... – Material from exhaust structure fed to engine intake
Patent
1978-03-28
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
042155398
ABSTRACT:
For use in an automobile multi-cylinder engine having exhaust port ducts leading from engine cylinders and through which exhaust gases are emitted subsequent to combustion of air-fuel mixture, an exhaust gas purifying apparatus which has a reducing catalyst unit and an oxidizing catalyst unit disposed in a main exhaust manifold connected on one hand to a first group of the exhaust port ducts and on the other hand to the atmosphere, and an auxiliary exhaust manifold connected on one hand to a second group of the exhaust port ducts and on the other hand to a portion of the main exhaust manifold at a position downstream of the reducing catalyst unit and upstream of the oxidizing catalyst unit. The apparatus further has a pressure operated valve disposed in 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.
REFERENCES:
patent: 3662541 (1972-05-01), Sawada
patent: 3767764 (1973-10-01), Delbear
patent: 3824788 (1974-07-01), Cole
patent: 3984975 (1976-10-01), Price
patent: 4024708 (1977-05-01), Takemoto
patent: 4056933 (1977-11-01), Nohira
patent: 4069666 (1978-01-01), Nakamura
Oda Tatsuro
Tanaka Kazuyuki
Hart Douglas
Toyo Kogyo Co. Ltd.
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