Exhaust gas recirculation control system

Details Exhaust gas recirculation control system Exhaust gas recirculation control system

1977-04-13

1978-09-19

Croyle, Carlton R.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 2506

Patent

active

041145771

ABSTRACT:
An exhaust gas recirculation (EGR) control valve provided with an extension which is inserted into a restriction, formed in the EGR passageway upstream of the EGR control valve, to reduce the effective cross sectional area of the restriction and therefore the EGR ratio when the pressure in the EGR passageway between the restriction and the EGR control valve is reduced below a predetermined value due to increases in an engine suction vacuum during low load engine operating conditions.

REFERENCES:
patent: 3762384 (1973-10-01), Day et al.
patent: 3834366 (1974-09-01), Kingsbury
patent: 3880129 (1975-04-01), Hollis
patent: 3982515 (1976-09-01), Bradshaw

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