Exhaust gas purification system

Details Exhaust gas purification system Exhaust gas purification system

1977-09-26

1979-03-06

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

60278, 60279, F02M 2506

Patent

active

041424921

ABSTRACT:
An exhaust gas purification system for use in an internal combustion engine equipped with a dual exhaust system. The exhaust gas purification system includes a secondary air supplying port of a secondary air supplying passage opened into selected one of a first or second group of exhaust pipes, while an exhaust gas deriving port of an exhaust gas recycling passage for recycling the exhaust gases to an upstream of the carburetor throttle valve is provided in the exhaust line at a downstream from the above secondary air supplying port for effective suppression of NOx through accurate control of the amount of exhaust gases to be recycled.

REFERENCES:
patent: 3776207 (1973-12-01), Simko
patent: 3779013 (1973-12-01), Faber et al.
patent: 3796049 (1974-03-01), Hayashi
patent: 3885540 (1975-05-01), Stadler
patent: 3929118 (1975-12-01), Leong
patent: 4068628 (1978-01-01), Duckworth
patent: 4084372 (1978-04-01), Kuroda et al.
patent: 4091615 (1978-05-01), Hayashi et al.

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