Exhaust-gas recirculation system

Details Exhaust-gas recirculation system Exhaust-gas recirculation system

1977-02-15

1979-11-13

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 2506

Patent

active

041739558

ABSTRACT:
An exhaust-gas recirculation (EGR) system for an internal-combustion engine comprises an EGR valve for controlling the amount of exhaust-gas recirculation installed midway in an EGR passage that establishes communication between the intake and exhaust pipes of the engine, and an exhaust-gas transducer valve for opening and closing by the exhaust pressure of the exhaust gas an atmospheric-releasing orifice formed midway in a vacuum conduit for introducing vacuum into the EGR valve. An acceleration control unit is connected to the exhaust-pressure transducer valve to prevent the entry of air from the atmospheric-releasing orifice into the vacuum conduit in the early stage of engine acceleration, even while the transducer valve is in operation, so as to control the generation of nitrous oxides during the acceleration.

REFERENCES:
patent: B405899 (1976-03-01), Moriya et al.
patent: 3881456 (1975-05-01), Nohira et al.
patent: 3888222 (1975-06-01), Tomita
patent: 3896777 (1975-07-01), Masaki et al.
patent: 4041914 (1977-08-01), Sugihara et al.

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