Exhaust gas recirculation flow control system

Details Exhaust gas recirculation flow control system Exhaust gas recirculation flow control system

1975-07-29

1977-05-10

Husar, C. J.

Fluid handling

Pressure modulating relays or followers

With counter-balancing pressure feedback to the modulating...

137102, F15B 500

Patent

active

040222373

ABSTRACT:
The present invention relates in general to reducing the internal combustion engine exhaust emission polutants. More specifically, it relates to a control device that regulates the amount of exhaust gas being recirculated into the intake manifold of an internal combustion engine such that the exhaust gas recirculation flow is nearly proportional to engine air flow, and is a controlled function of intake manifold vacuum. The flow may be completely inhibited at low engine temperatures and also at times of low manifold vacuum and high engine air flow in order to maintain acceptable driveability.

REFERENCES:
patent: 3461896 (1969-08-01), Holloway
patent: 3575190 (1971-04-01), Duster et al.
patent: 3661164 (1972-05-01), Kreuter
patent: 3739797 (1973-06-01), Caldwell
patent: 3814070 (1974-06-01), Wertheimer
patent: 3861642 (1975-01-01), Maddocks
patent: 3926161 (1975-12-01), Wertheimer

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