CA2028577A1 - Fuel metering method and apparatus - Google Patents

Fuel metering method and apparatus

Info

Publication number
CA2028577A1
CA2028577A1 CA2028577A CA2028577A CA2028577A1 CA 2028577 A1 CA2028577 A1 CA 2028577A1 CA 2028577 A CA2028577 A CA 2028577A CA 2028577 A CA2028577 A CA 2028577A CA 2028577 A1 CA2028577 A1 CA 2028577A1
Authority
CA
Canada
Prior art keywords
venturi
carburetor
fuel
main fuel
pitot tube
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.)
Granted
Application number
CA2028577A
Other languages
French (fr)
Other versions
CA2028577C (en
Inventor
John C. Woody
Mark S. Swanson
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.)
Walbro Corp
Original Assignee
Individual
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
Priority claimed from US07/594,021 external-priority patent/US5133905A/en
Application filed by Individual filed Critical Individual
Publication of CA2028577A1 publication Critical patent/CA2028577A1/en
Application granted granted Critical
Publication of CA2028577C publication Critical patent/CA2028577C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M17/00—Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
    • F02M17/02—Floatless carburettors
    • F02M17/04—Floatless carburettors having fuel inlet valve controlled by diaphragm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/10—Other installations, without moving parts, for influencing fuel/air ratio, e.g. electrical means
    • F02M7/11—Altering float-chamber pressure

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

Method, system and apparatus for metering fuel to an internal combustion engine via a carburetor having a mixture conduit with a venturi therein. A main fuel nozzle supplies fuel to the venturi of the carburetor in response to the static pressure drop induced across an associated main fuel flow controlling restriction by the engine intake induced air flow through the carburetor mixture conduit. A pitot tube is disposed in the venturi with an opening facing upstream in a zone of maximum air flow through the carburetor venturi. A vent passageway system connects the pitot tube to a single closed air chamber cooperable with either a diaphragm or a float to regulate operation of an inlet valve controlling flow of fuel to a main fuel controlling restriction. The adverse effect of engine intake induced tuning pressure wave forms in the mixture conduit of the carburetor transitting the venturi is eliminated, reduced or modulated by the dynamic pressure exerted by said tuning waves at the pitot tube and transmitted by the vent passageway to said chamber and to said main fuel restriction.
CA002028577A 1989-10-26 1990-10-25 Fuel metering method and apparatus Expired - Fee Related CA2028577C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US42667289A 1989-10-26 1989-10-26
US07/426,672 1989-10-26
US07/594,021 US5133905A (en) 1989-10-26 1990-10-09 Fuel metering method and apparatus
US07/594,021 1990-10-09

Publications (2)

Publication Number Publication Date
CA2028577A1 true CA2028577A1 (en) 1991-04-27
CA2028577C CA2028577C (en) 1997-12-30

Family

ID=27027140

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002028577A Expired - Fee Related CA2028577C (en) 1989-10-26 1990-10-25 Fuel metering method and apparatus

Country Status (5)

Country Link
EP (1) EP0424821B1 (en)
JP (1) JP2549199B2 (en)
CA (1) CA2028577C (en)
DE (1) DE69004779T2 (en)
IE (1) IE64317B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE453514B (en) * 1982-05-14 1988-02-08 Gronowitz Jan Sim0N SET TO DETERMINE DEOXITYMIDINKINAS-DTK ISOENZYM LEVELS IN BODY LIQUID OR CELL SAMPLES AND THE APPLICATION OF THE ISOENZYM TYPE PROCEDURE

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1779803A (en) * 1921-02-28 1930-10-28 Drogo Aurelien Carburetor for internal-combustion engines
US2212258A (en) * 1936-01-15 1940-08-20 Beck Ludwig Carburetor
GB459095A (en) * 1936-03-30 1937-01-01 Bernard Granville Improvements relating to carbureters for internal combustion engines
US3174732A (en) * 1962-09-28 1965-03-23 Acf Ind Inc Carburetor
US4020859A (en) * 1972-05-29 1977-05-03 Regie Nationale Des Usines Renault System for controlling pressure by acoustic means
JPS6427459U (en) * 1987-08-11 1989-02-16

Also Published As

Publication number Publication date
EP0424821A1 (en) 1991-05-02
EP0424821B1 (en) 1993-11-24
JPH03151557A (en) 1991-06-27
IE903709A1 (en) 1991-05-08
DE69004779T2 (en) 1994-03-17
DE69004779D1 (en) 1994-01-05
CA2028577C (en) 1997-12-30
JP2549199B2 (en) 1996-10-30
IE64317B1 (en) 1995-07-26

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed