Exhaust gas recycling system

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

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F02M 2506

Patent

active

041788966

ABSTRACT:
Controlled exhaust gas recycling can be accomplished by a pneumatically actuated valve which restricts the flow of exhaust gas from an exhaust manifold of an internal combustion engine to the intake manifold. Exhaust gas may be removed from the manifold and enters a pressure chamber through a reduction means, such as an aperture in a plate. The effective cross-sectional area of hydrodynamic flow of the reduction means is chosen to be greater than the effective cross-sectional area of hydrodynamic flow of the valve. The valve is actuated by a diaphragm control means which is coupled to the intake and exhaust manifold. The diaphragm control means controls the amount of partial pressure applied to the pneumatically actuated valve according to the exhaust pressure from the exhaust manifold. Thus, the ratio of exhaust gas recycled through the internal combustion engine relative to the amount of engine air intake, decreases as the air intake volume increases, such as when the engine is under high loads or operating at high rates (RPM).

REFERENCES:
patent: 3756210 (1973-09-01), Kuehl
patent: 3799131 (1974-03-01), Bolton
patent: 3802402 (1974-04-01), Swatman
patent: 3834366 (1974-09-01), Kingsbury
patent: 3926161 (1975-12-01), Wertheimer
patent: 3931813 (1976-01-01), Horie
patent: 4041917 (1977-08-01), Suzuki
patent: 4124004 (1978-11-01), Aoyama

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