Method and apparatus for controlling exhaust gas recirculation i

Details Method and apparatus for controlling exhaust gas recirculation i Method and apparatus for controlling exhaust gas recirculation i

1982-07-09

1984-05-08

Burns, Wendell E.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

123571, F02M 2506

Patent

active

044468393

ABSTRACT:
A method and an apparatus for controlling EGR in a diesel engine according to the present invention used an EGR valve having a diaphragm chamber, a pressure supplying device for supplying air pressure to the diaphragm chamber, an adjusting device for adjusting the air pressure corresponding to the rotation angle of a rotary shaft for controlling the amount of fuel injected, a rotation rate detector of the engine, and a pressure releasing device for releasing a portion of the negative pressure in said diaphragm chamber. In the method and apparatus, a portion of the negative pressure in the diaphragm chamber is released to an atmospheric pressure corresponding to the rotation rate of the engine. Thus, the rate of EGR is decreased in accordance with an increase in the rotation rate in an operating condition higher than a predetermined rotation rate.

REFERENCES:
patent: 4369753 (1983-01-01), Sugiyama

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