Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1977-11-16
1980-02-05
Casaregola, Louis J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
F02M 2506
Patent
active
041866983
ABSTRACT:
A restriction is formed in a branch passage of the exhaust gas passageway of an engine having a plurality of combustion chambers, which passage communicates at its upstream end with only a part of the combustion chambers of the engine, to divide the branch passage into upstream and downstream sections, and the EGR passageway connects the upstream section and the induction passageway of the engine, and the EGR rate is controlled by controlling a vacuum for operating the EGR control valve in accordance with the pressure differential between the upstream and downstream sections and/or a venturi vacuum to control the degree of opening of the EGR control valve and therefore the pressure differential between the sections and therefore the flow rate of exhaust gases passing through the restriction.
REFERENCES:
patent: 3776207 (1973-12-01), Simko
patent: 4031871 (1977-06-01), Hamanishi
patent: 4092960 (1978-06-01), Nohira et al.
Casaregola Louis J.
Nissan Motor Company Limited
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