Exhaust gas recirculation system

Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means

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Details

1376275, F02M 2506

Patent

active

041424964

ABSTRACT:
Two thermally operated control valves which, in cooperation with each other, admit into the vacuum chamber of the diaphragm unit for the EGR control valve atmospheric air only during cold engine operation, both atmospheric air and engine suction vacuum during engine warming-up operation, and engine suction vacuum only during engine normal operation.

REFERENCES:
patent: 3621825 (1971-11-01), Ojala
patent: 3783847 (1974-01-01), Kolody
patent: 3800764 (1974-04-01), Goto et al.
patent: 3828747 (1974-08-01), Nambu
patent: 3994269 (1976-11-01), Takaoka et al.
patent: 3996905 (1976-12-01), Dawson
patent: 4056083 (1977-11-01), Wakita
patent: 4058098 (1977-11-01), Onaka
patent: 4066056 (1978-01-01), Nohira et al.

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