Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1975-09-04
1976-12-21
Burns, Wendell E.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
F02M 2506
Patent
active
039981940
ABSTRACT:
In an automotive internal combustion engine, metered quantities of exhaust gases are recirculated by way of a control valve to the intake manifold of the engine in order to control temperatures within the combustion chambers, thereby reducing formation of oxides of nitrogen. The control or metering valve is actuated by a vacuum motor which may be in the form of a diaphragm and which vacuum motor is actuated by vacuum signals derived from a pair of ports in the carburetor which supplies the air-fuel mixture to the engine. Vacuum signals are picked up at each of the two ports in the carburetor and merged by way of a single conduit to the vacuum motor chamber of the control valve. Location of the ports and calibrated restrictions within the conduits regulate the control of the metering valve.
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patent: 3924589 (1975-12-01), Nohira et al.
patent: 3926161 (1975-12-01), Wertheimer
ACF Industries Incorporated
Burns Wendell E.
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