Exhaust gas recirculation system for internal combustion engine

Internal-combustion engines – Charge forming device – Crankcase vapor used with combustible mixture

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123568, F02M 2506

Patent

active

043253482

ABSTRACT:
An exhaust gas recirculation system for an internal combustion engine employs a first control valve in an exhaust gas introduction passageway, a second control valve in an air conduit connecting the engine intake passage to atmosphere, and a regulating valve responsive to differential vacuum intensities for operating vacuum-responsive actuators for the control valves. A recirculation stop valve vents to atmosphere the actuator for the second control valve in response to an engine operating condition, to stop recirculation of exhaust gas.

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patent: 4171688 (1979-10-01), Takahashi
patent: 4180033 (1979-12-01), Aoyama
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patent: 4233947 (1980-11-01), Abo
patent: 4235207 (1980-11-01), Nishimura
patent: 4242998 (1981-01-01), Shioya et al.

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