Power plants – Internal combustion engine with treatment or handling of... – Material from exhaust structure fed to engine intake
Patent
1978-05-30
1979-12-11
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Material from exhaust structure fed to engine intake
F02B 7510, F01N 310
Patent
active
041776410
ABSTRACT:
Disclosed herein is an apparatus for cleaning the exhaust gas of an internal combustion engine, which apparatus includes an exhaust gas recirculation system provided with a back-pressure control mechanism for maintaining a predetermined constant pressure of recirculated exhaust gas in a recirculation passageway, and an air injection system connecting an air pump with an exhaust system of the engine. An air-flow control valve having two vacuum chambers arranged between the air injection system and the exhaust gas recirculation system for controlling, in two stages, the amount of air diverted from the air injection system to the recirculation passageway. One of the chambers is directly connected to a vacuum source in the intake system of the engine. While the other is connected, via a vacuum delay unit, to the vacuum source.
REFERENCES:
patent: 3765210 (1978-09-01), Kuehl
patent: 3799131 (1974-03-01), Bolton
patent: 3802402 (1974-04-01), Swatman
patent: 3983697 (1976-10-01), Goto
patent: 4088101 (1973-05-01), Wakita
Hashimoto Eiji
Wakita Nobuaki
Hart Douglas
Toyota Jidosha Kogyo Kabushiki Kaisha
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