Automotive exhaust gas recirculation valve

Details Automotive exhaust gas recirculation valve Automotive exhaust gas recirculation valve

1977-07-07

1978-10-31

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 2506

Patent

active

041228103

ABSTRACT:
An exhaust gas recirculation valve for installation in the recirculation flow path between the exhaust and intake manifolds of an internal combustion engine. A metering control in the form of an axially displaceable pintle is operative in the flow path of a throat body to form an annular convergent-divergent nozzle. Pintle movement is responsive to predetermined engine variables to vary the throat flow area for continuously maintaining sonic gas flow therethrough. By the pintle being disposed toward closing the throat in a direction counter to the direction of incoming gas flow, sonic flow can be maintained at high efficiency throughout the full range flow capacity required of the valve.

REFERENCES:
patent: 3972312 (1976-08-01), Walker
patent: 3974807 (1976-08-01), Nohira
patent: 3978834 (1976-09-01), Arnaud
patent: 3981283 (1976-09-01), Kaufman
patent: 4056083 (1977-11-01), Wakita
patent: 4071005 (1978-01-01), Nakajima et al.

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