Exhaust gas purification promoting device

Details Exhaust gas purification promoting device Exhaust gas purification promoting device

1977-09-28

1980-02-05

Lazarus, Ira S.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123179G, 123179BG, 123180T, 74860, B60K 4118, F02N 1700

Patent

active

041866975

ABSTRACT:
Disclosed is a device for promoting the purification of exhaust gas in an internal combustion engine at the time of warm-up. The opening degree of the throttle valve of the carburetor is temporarily maintained open at about 20 degrees immediately after the engine is started. After this, the throttle valve is closed stepwise to its idling position as the temperature of the engine is increased. When the gear shift of the transmission is shifted from neutral to, for example, low gear, for driving a vehicle in the case wherein the opening degree of the throttle valve is being held open at about 20 degrees, the throttle valve is automatically closed to an opening degree which is smaller than 20 degrees.

REFERENCES:
patent: 3291462 (1966-12-01), Mennesson
patent: 3805642 (1974-04-01), Danek et al.
patent: 3809034 (1974-05-01), Durichen
patent: 3918257 (1975-11-01), Hirose et al.
patent: 3948240 (1976-04-01), Hirosawa et al.
patent: 3964457 (1976-06-01), Coscia
patent: 4008697 (1977-02-01), Konno
patent: 4026168 (1977-05-01), Kobayashi
patent: 4034626 (1977-07-01), Udagawa et al.
patent: 4048966 (1977-09-01), Harada et al.

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