Emission control system

Details Emission control system Emission control system

1975-10-21

1978-06-13

Hart, Douglas

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

137842, F02M 2506

Patent

active

040942848

ABSTRACT:
Exhaust gas is recirculated to an intake manifold of an engine by a shut-off valve and a fluidic amplifier for modulation in accordance with different engine parameters. The shut-off valve is normally biased to a closed position and it is opened to permit recirculation in response to a signal received from a fluidic NOR gate which operates in accordance with position of a carburetor throttle, engine speed and engine temperature. The fluidic amplifier includes a power jet chamber receiving a supply of exhaust and a vent chamber in fluid communication with a venturi disposed in the exhaust manifold, a receiver chamber and a pair of control jets. One of the control jets may be in fluid communication with the intake manifold or with a carburetor venturi. The other control jet may be open to atmospheric pressure compensated for the effect of changes in air density or engine speed.

REFERENCES:
patent: 3405736 (1968-10-01), Reader
patent: 3429322 (1969-02-01), Metzger
patent: 3579981 (1971-05-01), Gau
patent: 3581719 (1971-06-01), Gau
patent: 3616782 (1971-11-01), Matsui
patent: 3618932 (1971-11-01), Moreland
patent: 3678733 (1972-07-01), Blatter
patent: 3911674 (1975-10-01), Goto
patent: 3928966 (1975-12-01), Goto
patent: 4027635 (1977-06-01), Goto

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