Exhaust gas recirculation for an internal combustion engine

Details Exhaust gas recirculation for an internal combustion engine Exhaust gas recirculation for an internal combustion engine

1978-12-13

1980-06-10

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 2506

Patent

active

042067316

ABSTRACT:
A back pressure control type EGR system wherein a vacuum line for connecting an EGR port with a vacuum operated EGR valve for controlling the amount of the recirculated exhaust gas is selectively opened to an air chamber of a vacuum modulator valve responsive to the pressure of the recirculated exhaust gas. The air chamber is connected, via a vacuum line, to a second vacuum port located slightly above the EGR port. A vacuum switching valve responsive to vacuum pressure at a third port formed in an intake manifold is arranged in the vacuum line.

REFERENCES:
patent: 4041917 (1977-08-01), Suzuki
patent: 4092960 (1978-06-01), Nohira et al.
patent: 4128090 (1978-12-01), Aoyama
patent: 4137874 (1979-02-01), Otsubo et al.
patent: 4149503 (1979-04-01), Ozaki et al.
patent: 4150649 (1979-04-01), Gropp

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