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Title: Air-fuel ratio controlling system for an internal combustion engine

Abstract

An air-fuel ratio controlling system for a fuel-injection type internal combustion engine has an air valve disposed in an air intake duct upstream of a throttle valve and a fuel-metering variable orifice disposed in a fuel circuit. The air valve and the fuel-metering variable orifice are operatively associated with each other and controlled normally to maintain the air-fuel ratio at a substantially constant value. Pressurized fuel is used as a working fluid to operate the air valve. O2 sensor detects the oxygen content of exhaust gases to actuate a valve which varies the pressure of the working fluid to change the degree of opening of the air valve whereby the air-fuel ratio is adjusted in accordance with the output of the o2 sensor.

Inventors:
; ; ; ; ; ;
Publication Date:
OSTI Identifier:
5743877
Patent Number(s):
US 4187816
Assignee:
Aisan Industry Co Ltd Japan; Toyota Jidosha Kogyo K K (Japan)
Resource Type:
Patent
Resource Relation:
Patent Priority Date: Priority date 20 Jul 1977, Japan; Other Information: PAT-APPL-923307
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; FUEL INJECTION SYSTEMS; CONTROL SYSTEMS; INTERNAL COMBUSTION ENGINES; FUEL-AIR RATIO; EXHAUST GASES; OXYGEN; VALVES; WORKING FLUIDS; CONTROL EQUIPMENT; ELEMENTS; ENGINES; EQUIPMENT; FLOW REGULATORS; FLUIDS; FUEL SYSTEMS; GASEOUS WASTES; GASES; HEAT ENGINES; NONMETALS; WASTES; 330100* - Internal Combustion Engines

Citation Formats

Ando, T, Minoura, M, Motosugi, K, Sekiya, S, Sumiyoshi, M, Takeuchi, Y, and Uozumi, J. Air-fuel ratio controlling system for an internal combustion engine. United States: N. p., 1980. Web.
Ando, T, Minoura, M, Motosugi, K, Sekiya, S, Sumiyoshi, M, Takeuchi, Y, & Uozumi, J. Air-fuel ratio controlling system for an internal combustion engine. United States.
Ando, T, Minoura, M, Motosugi, K, Sekiya, S, Sumiyoshi, M, Takeuchi, Y, and Uozumi, J. Tue . "Air-fuel ratio controlling system for an internal combustion engine". United States.
@article{osti_5743877,
title = {Air-fuel ratio controlling system for an internal combustion engine},
author = {Ando, T and Minoura, M and Motosugi, K and Sekiya, S and Sumiyoshi, M and Takeuchi, Y and Uozumi, J},
abstractNote = {An air-fuel ratio controlling system for a fuel-injection type internal combustion engine has an air valve disposed in an air intake duct upstream of a throttle valve and a fuel-metering variable orifice disposed in a fuel circuit. The air valve and the fuel-metering variable orifice are operatively associated with each other and controlled normally to maintain the air-fuel ratio at a substantially constant value. Pressurized fuel is used as a working fluid to operate the air valve. O2 sensor detects the oxygen content of exhaust gases to actuate a valve which varies the pressure of the working fluid to change the degree of opening of the air valve whereby the air-fuel ratio is adjusted in accordance with the output of the o2 sensor.},
doi = {},
url = {https://www.osti.gov/biblio/5743877}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {2}
}