Engine exhaust gas recirculation system

Details Engine exhaust gas recirculation system Engine exhaust gas recirculation system

1979-08-27

1981-06-23

Burns, Wendell E.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

F02B 4708

Patent

active

042743842

ABSTRACT:
An exhaust gas recirculation system for an internal combustion engine employs a recirculation control valve in a passageway connecting the engine exhaust passage to the engine intake passage downstream from the throttle valve. An air conduit having an air control valve therein draws atmospheric air into the intake passage downstream from the throttle valve. Vacuum responsive actuators are provided for each of the control valves and they are operated by vacuum pressure controlled by a regulating valve, which regulating valve is responsive to differential pressure between vacuum intensity in the intake passage upstream from said throttle valve and modified atmospheric pressure. The modified atmospheric pressure is obtained downstream of a fixed or variable restriction in the air conduit.

REFERENCES:
patent: 3739797 (1973-06-01), Caldwell
patent: 3779222 (1973-12-01), Lorenz
patent: 3818880 (1974-06-01), Dawson
patent: 3884200 (1975-05-01), Caldwell
patent: 3915136 (1975-10-01), Caldwell
patent: 3970061 (1976-07-01), Caldwell
patent: 4033308 (1977-07-01), Hayashi

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