Closed-loop fluidic control system for internal combustion engin

Details Closed-loop fluidic control system for internal combustion engin Closed-loop fluidic control system for internal combustion engin

1980-12-10

1982-01-05

Miles, Tim R.

Internal-combustion engines

Charge forming device

Auxiliary control of carburetor fuel metering

251 612, 251 615, 13759618, 261 44D, 261DIG56, 123440, F02M 914

Patent

active

043088350

ABSTRACT:
A closed-loop fluidic control servo system for a vehicle having an internal combustion engine provided with a variable Venturi carburetor having an axially-shiftable spool operated by a vacuum motor. The system acts automatically through the motor to maintain the ratio of fuel-to-air supplied by the Venturi carburetor to the intake manifold of the system at the optimum value during all prevailing conditions of engine speed and load encountered in vehicular operation. The system includes a vacuum amplifier coupled to the intake manifold and responsive to a differential vacuum signal developed between the pressures existing at the inlet and throat of the Venturi to produce a proportionally amplified vacuum which is derived from the intake manifold vacuum and is a function of the vacuum signal. The proportionally amplified vacuum serves to energize the vacuum motor to shift the axial position thereof in a direction and to an extent bringing about the desired fuel-to-air ratio.

REFERENCES:
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patent: 4089311 (1978-05-01), Brettschneider et al.
patent: 4102313 (1978-07-01), Laprade et al.
patent: 4118444 (1978-10-01), Abbey
patent: 4211196 (1980-07-01), d'Orsay

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