Exhaust gas recirculation control system

Details Exhaust gas recirculation control system Exhaust gas recirculation control system

1977-07-21

1979-10-16

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 2506

Patent

active

041709721

ABSTRACT:
An EGR control valve is closably disposed in an EGR passageway connecting an intake passageway and an exhaust gas passageway which leads to an internal combustion engine. The EGR control valve is operated to control recirculated exhaust gas flow by varying the exhaust gas pressure in a chamber between a restriction disposed in the EGR passageway and the EGR valve, in accordance with variations in a venturi vacuum in the intake passageway to prevent the recirculated exhaust gas flow from being affected by the exhaust gas pressure in the EGR passageway upstream of the chamber. Furthermore, the EGR control valve is arranged to be controlled so that the amount of the recirculated exhaust gas flow is reduced during high engine speed and low load engine operation.

REFERENCES:
patent: 3926161 (1975-12-01), Wertheimer
patent: 3973535 (1976-08-01), Sugihara et al.
patent: 4006721 (1977-02-01), Takagi et al.
patent: 4013052 (1977-03-01), Masaki et al.
patent: 4027638 (1977-06-01), Moriya et al.
patent: 4031871 (1977-06-01), Hamanishi
patent: 4033309 (1977-07-01), Hayashi et al.
patent: 4041914 (1977-08-01), Sugihara et al.
patent: 4041917 (1977-08-01), Suzuki
patent: 4057043 (1977-11-01), Harada

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