Carburetor having electronically controlled elements for maintai

Details Carburetor having electronically controlled elements for maintai Carburetor having electronically controlled elements for maintai

1983-12-16

1985-06-25

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Auxiliary control of carburetor fuel metering

123339, 261 52, 261 39R, F02B 3300

Patent

active

045247420

ABSTRACT:
A carburetor is provided which includes a sensor mounted in the engine head for monitoring cooling water temperature, and sensors for monitoring engine RPM and intake manifold absolute pressure. A first positioning unit positions the throttle valve, prior to depression of the accelerator, in a plurality of angular positions as a function of the cooling water temperature. A second positioning unit positions the choke valve as a function of the cooling water temperature to limit the amount of opening of the choke valve caused by air sucked into the carburetor by the engine. The second positioning unit has a spring for biasing the choke valve to close the choke valve to prevent swinging of the choke valve when the engine is turned off. A central processing unit receives signals from the first, second and third sensors to control the first and second positioning units to position the throttle valve and the choke valve respectively.

REFERENCES:
patent: 2646933 (1953-07-01), Boyce
patent: 2926895 (1960-03-01), Seyfarth
patent: 3294374 (1966-12-01), Smith
patent: 3774582 (1973-11-01), Masaki
patent: 3886917 (1975-06-01), Nakada
patent: 3906911 (1975-09-01), Nakada
patent: 4011844 (1977-03-01), Hirosawa
patent: 4237833 (1980-12-01), Des Cauriers
patent: 4237838 (1980-12-01), Kinugawa
patent: 4321902 (1982-03-01), Stoltman
patent: 4391249 (1983-07-01), Bianchi

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