Electronically controlled carburetor

Details Electronically controlled carburetor Electronically controlled carburetor

1982-01-20

1983-10-04

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Auxiliary control of carburetor fuel metering

123438, 123494, 261DIG74, 261 44C, F02B 3300, F02M 700

Patent

active

044072481

ABSTRACT:
An electronically controlled carburetor for an internal combustion engine for a vehicle has a variable venturi for varying the venturi cross-section and concurrently varying the amount of air metered into the venturi in response to the engine demands an air flow sensor for sensing the displacement of the variable venturi and producing related electrical signals in response to changes in air flow through the venturi, a main fuel nozzle for discharging metered fuel into the venturi, a fuel flow sensor for sensing pressure differential of fuel across a main fuel jet communicating with the main fuel nozzle and for producing related electrical signals in response to changes in fuel flow through the main fuel jet, an air bleed controlling actuator for controlling the amount of air to be bled into the main fuel nozzle, and a control circuit responsive to the output signals from the air flow sensor and the fuel flow sensor for driving the air bleed controlling actuator. With this arrangement, the amount of air bleed may be controlled so as to set the ratio of air-to-fuel at an arbitrary fixed value at all times.

REFERENCES:
patent: 3900014 (1975-08-01), Bundesen et al.
patent: 4083338 (1978-04-01), Berthing et al.
patent: 4153021 (1979-05-01), Hattori et al.
patent: 4172436 (1979-10-01), Mennesson
patent: 4290399 (1981-09-01), Takada et al.
patent: 4314535 (1982-02-01), Takeuchi et al.
patent: 4341190 (1982-07-01), Ishikawa et al.

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