Altitude compensating system of a carburetor mounted on a vehicl

Details Altitude compensating system of a carburetor mounted on a vehicl Altitude compensating system of a carburetor mounted on a vehicl

1977-10-26

1979-05-08

Lutter, Frank W.

Gas and liquid contact apparatus

Contact devices

Liquid tank

261 39A, 123119D, 123124R, F02M 724

Patent

active

041536525

ABSTRACT:
An altitude compensating system of a carburetor for obtaining a desirable enriched air fuel ratio. The system comprises: a device for enriching the air fuel ratio after the engine load has reached a predetermined first value; an altitude compensating valve device for supplying compensating air in accordance with changes in altitude; a control valve device communicated with the altitude compensating valve device for permitting the compensating air to pass after the engine load has reached a predetermined second value, and; a switching valve device disposed at a position between the control valve device and a main jet of a carburetor and interlocked with a throttle valve of the carburetor for switching the compensating air.
The system can enrich the air fuel ratio at low altitude after the engine load has reached a first value and, also, can create a lean air fuel ratio, or only slightly enriched, air fuel ratio, at high altitude after the engine load has reached a predetermined second value, so that the system can prevent the increase of harmful CO and HC contaminants contained in exhaust gas emitted from the engine at high altitude. The system can enrich the air fuel ratio at high altitude when the throttle valve is wide-open.

REFERENCES:
patent: 2252120 (1941-08-01), Ericson
patent: 3548792 (1970-12-01), Palmer
patent: 3810606 (1974-05-01), Masaki
patent: 3831910 (1974-08-01), Shadbolt
patent: 3857908 (1974-12-01), Brown et al.
patent: 3861366 (1975-01-01), Masaki et al.
patent: 3906910 (1975-09-01), Szlaga, Jr.
patent: 3987131 (1976-10-01), Hisatomi et al.

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