EP0209389A3 - Electric air bleed control system for carburettor - Google Patents

Electric air bleed control system for carburettor Download PDF

Info

Publication number
EP0209389A3
EP0209389A3 EP86305509A EP86305509A EP0209389A3 EP 0209389 A3 EP0209389 A3 EP 0209389A3 EP 86305509 A EP86305509 A EP 86305509A EP 86305509 A EP86305509 A EP 86305509A EP 0209389 A3 EP0209389 A3 EP 0209389A3
Authority
EP
European Patent Office
Prior art keywords
fuel
air
passage
piston
control system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP86305509A
Other languages
German (de)
French (fr)
Other versions
EP0209389A2 (en
Inventor
Tsuneo C/O Aisan Kogyo Kabushiki Kaisha Ando
Kazusato C/O Aisan Kogyo Kabushiki Kaisha Kasuya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisan Industry Co Ltd
Original Assignee
Aisan Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aisan Industry Co Ltd filed Critical Aisan Industry Co Ltd
Publication of EP0209389A2 publication Critical patent/EP0209389A2/en
Publication of EP0209389A3 publication Critical patent/EP0209389A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2454—Learning of the air-fuel ratio control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/0015—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for using exhaust gas sensors
    • F02D35/0046—Controlling fuel supply
    • F02D35/0053—Controlling fuel supply by means of a carburettor
    • F02D35/0076—Controlling fuel supply by means of a carburettor using variable venturi carburettors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2441—Methods of calibrating or learning characterised by the learning conditions
    • F02D41/2445—Methods of calibrating or learning characterised by the learning conditions characterised by a plurality of learning conditions or ranges

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)

Abstract

An electric air bleed control system for a carburetor of the type which comprises a main throttle valve (25) in an induction passage, a throttle piston (24) located upstream of the throttle valve and axially displaceable to form a variable venturi, a pneumatic actuator (22) arranged to be activated by a vacuum depending on the flow of air in the induction passage for effecting axial displacement of the piston, a fuel passage (29) arranged to permit the flow of fuel from a fuel reservoir into a mixing chamber (R) between the piston and the throttle valve and being provided therein with a fuel metering jet (29e), a needle valve element (27a) integral with the piston for con­ trolling the cross-sectional area of the fuel metering jet, and an air bleed passage (21f) arranged to permit the flow of atmospheric air into the fuel passage. The control system is arranged to determine one of plural learning regions in ac­ cordance with the axial displacement of the needle valve element, the plural learning regions corresponding with a plurality of subdivided displacement regions of the needle valve element, to learn an instantaneous air-fuel ratio of the mixture in relation to oxygen concentration in exhaust gases of the engine, to determine an optimum amount of air based on a resultant of the learning for supply of an optimum amount of fuel into the mixing chamber, and to produce an output signal indicative of the optimum amount of air and apply it to an electrically operated valve mechanism (30) disposed within the air bleed passage.
EP86305509A 1985-07-18 1986-07-17 Electric air bleed control system for carburettor Withdrawn EP0209389A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP15884885A JPS6220665A (en) 1985-07-18 1985-07-18 Air bleed quantity controlling apparatus for variable venturi type carburetor
JP158848/85 1985-07-18

Publications (2)

Publication Number Publication Date
EP0209389A2 EP0209389A2 (en) 1987-01-21
EP0209389A3 true EP0209389A3 (en) 1987-11-25

Family

ID=15680727

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86305509A Withdrawn EP0209389A3 (en) 1985-07-18 1986-07-17 Electric air bleed control system for carburettor

Country Status (2)

Country Link
EP (1) EP0209389A3 (en)
JP (1) JPS6220665A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6350644A (en) * 1986-08-13 1988-03-03 Fuji Heavy Ind Ltd Air-fuel ratio control system for engine
JPH0751907B2 (en) * 1987-03-11 1995-06-05 株式会社日立製作所 Air-fuel ratio learning controller
DE4004107C2 (en) * 1990-02-10 1999-03-25 Bosch Gmbh Robert Method and device for controlling electromagnetic valves of a fuel pump
IT1257433B (en) * 1991-12-06 1996-01-16 Honda Motor Co Ltd EXHAUST DEVICE FOR AN INTERNAL COMBUSTION ENGINE.
JPH07253048A (en) * 1994-03-15 1995-10-03 Yamaha Motor Co Ltd Air-fuel mixture forming method of gaseous fuel engine and device thereof
JP2018091235A (en) 2016-12-02 2018-06-14 株式会社やまびこ Portable engine work machine and rotary type carburetor incorporated into the same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963009A (en) * 1973-05-04 1976-06-15 Societe Industrielle De Brevets Et D'etudes S.I.B.E. Carburation devices for internal combustion engines
US4089311A (en) * 1975-07-08 1978-05-16 Robert Bosch Gmbh Fuel supply system for internal combustion engines
GB2017348A (en) * 1978-03-22 1979-10-03 Bosch Gmbh Robert Automatic control of ic engines
US4200064A (en) * 1977-04-27 1980-04-29 Fabbrica Italiana Magneti Marelli S.P.A. Electronic apparatus for feed control of air-gasoline mixture in internal combustion engines
US4201161A (en) * 1977-10-17 1980-05-06 Hitachi, Ltd. Control system for internal combustion engine
US4250856A (en) * 1980-01-25 1981-02-17 Abbey Harold Fuel-air ratio automatic control system using variable venturi structure

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS582451A (en) * 1981-06-29 1983-01-08 Aisan Ind Co Ltd Air-fuel ratio controller for internal-combustion engine with constant pressure carburetor
JPS5859329A (en) * 1981-10-02 1983-04-08 Nippon Denso Co Ltd Air-fuel ratio control method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963009A (en) * 1973-05-04 1976-06-15 Societe Industrielle De Brevets Et D'etudes S.I.B.E. Carburation devices for internal combustion engines
US4089311A (en) * 1975-07-08 1978-05-16 Robert Bosch Gmbh Fuel supply system for internal combustion engines
US4200064A (en) * 1977-04-27 1980-04-29 Fabbrica Italiana Magneti Marelli S.P.A. Electronic apparatus for feed control of air-gasoline mixture in internal combustion engines
US4201161A (en) * 1977-10-17 1980-05-06 Hitachi, Ltd. Control system for internal combustion engine
GB2017348A (en) * 1978-03-22 1979-10-03 Bosch Gmbh Robert Automatic control of ic engines
US4250856A (en) * 1980-01-25 1981-02-17 Abbey Harold Fuel-air ratio automatic control system using variable venturi structure

Also Published As

Publication number Publication date
EP0209389A2 (en) 1987-01-21
JPS6220665A (en) 1987-01-29

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Inventor name: ANDO, TSUNEOC/O AISAN KOGYO KABUSHIKI KAISHA

Inventor name: KASUYA, KAZUSATOC/O AISAN KOGYO KABUSHIKI KAISHA