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Title: Closed-loop fluidic control system for internal combustion engines

Abstract

A closed-loop fluidic control servo system is described 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.

Inventors:
Publication Date:
OSTI Identifier:
5512146
Patent Number(s):
US 4308835
Assignee:
IFI; EDB-82-077555
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 10 Dec 1980; Other Information: PAT-APPL-214626
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; FUEL SYSTEMS; CLOSED-LOOP CONTROL; INTERNAL COMBUSTION ENGINES; AIR POLLUTION CONTROL; CARBURETORS; FUEL ECONOMY; FUEL-AIR RATIO; VENTURI TUBES; CONTROL; ENGINES; HEAT ENGINES; POLLUTION CONTROL; 330100* - Internal Combustion Engines

Citation Formats

Abbey, H G. Closed-loop fluidic control system for internal combustion engines. United States: N. p., 1982. Web.
Abbey, H G. Closed-loop fluidic control system for internal combustion engines. United States.
Abbey, H G. 1982. "Closed-loop fluidic control system for internal combustion engines". United States.
@article{osti_5512146,
title = {Closed-loop fluidic control system for internal combustion engines},
author = {Abbey, H G},
abstractNote = {A closed-loop fluidic control servo system is described 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.},
doi = {},
url = {https://www.osti.gov/biblio/5512146}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 05 00:00:00 EST 1982},
month = {Tue Jan 05 00:00:00 EST 1982}
}