Exhaust gas recycling system

Details Exhaust gas recycling system Exhaust gas recycling system

1977-09-26

1979-01-16

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 2506

Patent

active

041343760

ABSTRACT:
An exhaust gas recycling system for use in an internal combustion engine in which downstream exhaust gas recycling is started when the carburetor throttle valve is opened larger than a first predetermined opening degree, while upstream exhaust gas recycling is commenced when the carburetor throttle valve is opened larger than a second predetermined opening degree. The second predetermined opening degree is set at a level exceeding at least a maximum amount or peak value of the downstream exhaust gas recycling, and thereafter, reduction of downstream exhaust gas recycling ratio following decrease of intake negative pressure at the downstream of the carburetor throttle valve is compensated by increase of the upstream exhaust gas recycling augmented in proportion to the intake amount of the air-fuel mixture, through employment of flow rate control valves for the upstream and downstream exhaust gas recycling.

REFERENCES:
patent: 4040402 (1977-08-01), Nohira et al.
patent: 4041913 (1977-08-01), Nohira et al.
patent: 4061119 (1977-12-01), Takeshita et al.
patent: 4066056 (1978-01-01), Nohira et al.

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