Control system for exhaust gas recirculating valve

Details Control system for exhaust gas recirculating valve Control system for exhaust gas recirculating valve

1975-03-07

1976-07-20

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 2506

Patent

active

039700615

ABSTRACT:
An exhaust gas recirculation control system for an internal combustion engine is disclosed in which a pressure operated exhaust gas recirculation (EGR) valve governs the flow of engine exhaust gas into the engine intake. The EGR valve is supplied with operating pressure from the engine intake manifold via a pressure amplifier. The amplifier has a pressure input which tends to vary in relation to the flow rate of gas through the engine so that the EGR valve operating pressure varies as an amplified function of the amplifier input pressure signal. A control valve modifies the amplifier input signal as a function of intake manifold pressure to enable the EGR valve operation to be programmed as desired throughout the range of operation of the engine.

REFERENCES:
patent: 3739797 (1973-06-01), Caldwell
patent: 3818880 (1974-06-01), Dawson et al.
patent: 3884200 (1975-05-01), Caldwell
patent: 3915136 (1975-10-01), Caldwell

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