Exhaust gas recirculation system

Details Exhaust gas recirculation system Exhaust gas recirculation system

1974-08-29

1976-08-31

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 2506

Patent

active

039773817

ABSTRACT:
An auxiliary flow control valve is disposed in an exhaust gas recirculation passageway at a location upstream of a main flow control valve controlling the flow rate of exhaust gases recirculated into an intake system. Two conduits communicating with an intake manifold communicate with a vacuum chamber of a servo motor controlling the main flow control valve. One of the conduits has formed therein a restriction to limit the flow rate of fluid therethrough. A check valve is disposed in the other conduit to close the same when the vacuum in the intake manifold is increased and constant and to open the other conduit when the vacuum in the intake manifold is reduced.

REFERENCES:
patent: 2720196 (1955-10-01), Wolf
patent: 2722927 (1955-11-01), Cornelius
patent: 3739797 (1973-06-01), Caldwell
patent: 3768452 (1973-10-01), Lewis
patent: 3835827 (1974-09-01), Wolgemuth
patent: 3861642 (1975-01-01), Maddocks

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