Exhaust gas recirculation system for an internal combustion engi

Details Exhaust gas recirculation system for an internal combustion engi Exhaust gas recirculation system for an internal combustion engi

1978-12-06

1980-05-20

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 2506

Patent

active

042034000

ABSTRACT:
An exhaust gas recirculation system for an internal combustion engine wherein a fixed restriction, a pressure chamber and a pressure control valve are arranged in the order named in an exhaust gas recirculation passage and the pressure control valve is controlled in such a way that the pressure in the pressure chamber may be maintained equal to the combined pressure which is obtained by the comparison between two amplified pressure signals A and B both of which represent the quantity such as the negative pressure in an intake pipe which in turn represents the variations in load on the engine. With these two pressure signals A and B, the pressure in the pressure chamber may be varied from the exhaust gas pressure to the pressure a few times the negative pressure created in a venturi in the intake pipe, whereby in response to the variations in load on the engine, which may be represented by the variations in the negative pressure in the intake pipe, the ratio of the flow rate of the exhaust gases to be recirculated to the quantity of the intake air may be varied more widely than in the exhaust gas recirculation system.

REFERENCES:
patent: 4041917 (1977-08-01), Suzuki
patent: 4090482 (1978-05-01), Yoshida
patent: 4092960 (1978-06-01), Nohira et al.
patent: 4130093 (1978-12-01), Aoyama
patent: 4148286 (1979-04-01), Kohama et al.
patent: 4150648 (1979-04-01), Ogita

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