Three-step exhaust gas recirculation control system

Details Three-step exhaust gas recirculation control system Three-step exhaust gas recirculation control system

1979-12-11

1981-07-28

Burns, Wendell E.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

123571, F02M 2506

Patent

active

042804701

ABSTRACT:
An exhaust gas recirculation control system for particular application to a diesel engine, which has an exhaust gas recirculation control valve, and a means for actuating the exhaust gas recirculation control valve, which positions the exhaust gas recirculation control valve selectively and steppedly at one of three states, that are: a first state in which it provides substantially zero exhaust gas recirculation ratio, a second state in which it provides a medium exhaust gas recirculation ratio, and a third state in which it provides a maximum exhaust gas recirculation ratio, according to the load on the engine, so that the valve is steppedly shifted from the third state toward the first state via the second state as engine load increases.

REFERENCES:
patent: 4157081 (1979-06-01), Wake et al.
patent: 4181109 (1980-01-01), Ware et al.
patent: 4192267 (1980-03-01), Cobb
patent: 4237837 (1980-12-01), Toda et al.

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