Exhaust gas recirculation control assembly

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

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F02M 2506

Patent

active

039825159

ABSTRACT:
A valve assembly is provided for controlling the recirculation of exhaust gas in an internal combustion engine. The assembly comprises body means defining a first chamber containing vacuum, and a second chamber exposed to air at substantially atmospheric pressure. A means is provided for communicating between the first chamber and the second chamber including first valve means for controlling the flow of air from the second chamber into the first chamber in response to variations in the pressure of the exhaust gas, and a pressure responsive control means is subjected to the pressure in one of the chambers. The assembly further includes an exhaust gas inlet and an exhaust gas outlet and a second valve means disposed between the inlet and the outlet, the valve means being operatively associated with the pressure responsive means to be controlled by the movement of the pressure responsive means. A passage means is in open communication between the exhaust gas inlet and the first valve means which, preferably, includes a valve member defining an orifice communicating between the first chamber and the second chamber. A control means is provided and is movable in response to variations in exhaust gas pressure between two positions spaced apart from the valve member.

REFERENCES:
patent: 3756210 (1973-09-01), Kuehl
patent: 3762384 (1973-10-01), Day et al.
patent: 3783848 (1974-01-01), Ranft et al.
patent: 3799131 (1974-03-01), Bolton
patent: 3802402 (1974-04-01), Swatman
patent: 3834366 (1974-10-01), Kingsbury
patent: 3880129 (1975-04-01), Hollis, Jr.

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