System for controlling the air-fuel ratio supplied to an engine

Details System for controlling the air-fuel ratio supplied to an engine System for controlling the air-fuel ratio supplied to an engine

1984-03-05

1985-09-17

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Auxiliary control of carburetor fuel metering

123559, 261121B, 261DIG51, F02M 724

Patent

active

045413843

ABSTRACT:
A system for controlling the air-fuel ratio for an engine comprises a valve provided in an inlet of an air bleed of a carburetor of the engine. An actuator comprises a diaphragm operatively connected to the valve and first and second chambers defined by the diaphragm. An opening is provided for communicating the first chamber with the intake passage at the upstream side of a throttle valve of the engine, and a passage is provided for communicating the second chamber with the intake passage at the downstream side of the throttle valve. The actuator is so arranged that the valve closes when the difference between the pressures in the first and second chambers exceeds a predetermined value, thereby supplying a rich air-fuel mixture.

REFERENCES:
patent: 2070009 (1937-02-01), Goodman
patent: 4241711 (1980-12-01), Detweiler

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