US3802671A - Means preventing the extraction of fuel from the accelerating pump - Google Patents

Means preventing the extraction of fuel from the accelerating pump Download PDF

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Publication number
US3802671A
US3802671A US00241774A US24177472A US3802671A US 3802671 A US3802671 A US 3802671A US 00241774 A US00241774 A US 00241774A US 24177472 A US24177472 A US 24177472A US 3802671 A US3802671 A US 3802671A
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United States
Prior art keywords
fuel
valve
air
conduit
fuel passage
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.)
Expired - Lifetime
Application number
US00241774A
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English (en)
Inventor
A Klutho
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.)
Carter Automotive Co Inc
Original Assignee
ACF Industries Inc
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 ACF Industries Inc filed Critical ACF Industries Inc
Priority to US00241774A priority Critical patent/US3802671A/en
Priority to AU53591/73A priority patent/AU465430B2/en
Priority to CA167,311A priority patent/CA989263A/en
Priority to JP48035540A priority patent/JPS497621A/ja
Application granted granted Critical
Publication of US3802671A publication Critical patent/US3802671A/en
Assigned to CARTER AUTOMOTIVE CORPORATION, INC., 9666 OLIVE BOULEVARD, ST. LOUIS, MISSOURI 63132, A CORP. OF DE. reassignment CARTER AUTOMOTIVE CORPORATION, INC., 9666 OLIVE BOULEVARD, ST. LOUIS, MISSOURI 63132, A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ACF INDUSTRIES, INCORPORATED
Assigned to CARTER AUTOMOTIVE COMPANY, INC. reassignment CARTER AUTOMOTIVE COMPANY, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ACF INDUSTRIES, INCORPORATED
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/06—Means for enriching charge on sudden air throttle opening, i.e. at acceleration, e.g. storage means in passage way system
    • F02M7/08—Means for enriching charge on sudden air throttle opening, i.e. at acceleration, e.g. storage means in passage way system using pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/56—Variable venturi

Definitions

  • a carburetor is provided with an acceleration pump having a' pit or reservoir normally filled with fuel.
  • the pump has a plunger adapted to be operated operation of the accelerator foot pedalto force a charge of fuel through a passage into the mixture conduit of the carburetor.
  • the fuel passage terminates in an opening or a nozzle extending into the mixture conduit.
  • the fuel passage is commonly provided with a'check valve for preventing flow backward to the acceleration pump.
  • the fuel passage nozzle is subjected to the depression in the mixture conduit, which may result from the vacuum created therein or from the velocity of the air passing over the nozzle.
  • the invention providesmeans for counteracting the de pression in the fuel passage. Thisis done by providing an air vent to the fuel passage through a spring pressed check valve to permit enough air to enter the fuel passage to substantially destroy the vacuum created therein.
  • the fuel passage check valve is forced open and the check valve for the vent is closed to permit the pumped fuel to be conveyed to the mixture conduit as required.
  • the two check valves may have a commonspring, or the equivalent thereof,-so that the'force opening the fuel passage valve is communicated through the spring to close the vent valve.
  • FIG. 1 is an elevation partly broken away of a concentric staged carburetor.
  • FIG. 2 is a partial sectional view of the check valves and nozzle. said depression and an inner venturi 14.
  • the bottom of mixture conduit 12 is provided with a throttle valve 16, and at the upper end of the mixture conduit there are air valves 17 and 18 and a choke valve 20 within venturi 14.
  • the latter includes a main fuel inlet 22.
  • the carburetor also includes a fuel bowl 24 containing an acceleration pump 26.
  • Pump 26 includes plunger 28 connectedto link 30 and adapted to be turned by pivot 32.
  • Plunger piston 34 moves in a cylinder 36 normally, filled with fuel. Plunger 28 and piston 34'are normally held in their retracted positions by spring38.
  • the pit 40 of cylinder 36 is connected by fuel passage 42, and a chamber 44 to nozzle 46 extending into mixture "conduit 12.Check valve 48 for the fuel passage 42 is provided in chamber 44.
  • the upper sideof chamber 44 has an opening 50 communicatingwith a passage 52 to the atmosphere. Opening or vent 50 is adapted to be closed by ball check valve 54.
  • Spring 7 56 extends between check valves 48 and 54.
  • FIGS. 3 and 4 are partial sectional views showing two other embodiments of the check valves.
  • the depression in mixture conduit 12 may rise to a rather high level, approaching in some cases the equivalent of 12 inches of water.
  • the velocity of the air passing over nozzle 46 may produce a high depression thereat, which would tend to draw fuel from pit 40 of the acceleration pump. This is prevented, however, by bleeding 7 enough air through air passage 52 and air vent 50 into chamber 44 to substantially destroy the vacuum which would otherwise be created in chamber 44.
  • Vent valve 54 may be lightly closed or even open when the engine is not running, but, in any event, spring 56 is calibrated so that ball valve 54 will be retracted to an open posi-- tion when an appreciable depression occurs at nozzle 46.
  • a carburetor of the concentric staged type having a body 10 including a mixture conduit 12 valve 54 to open vent 50, particularly if a sufficient depression is present at the outlet of nozzle 46.
  • FIG. 3 shows a modification of the check valves
  • ball valves 48 and 54 may be replaced by discs 62 and 64 of any suitable fuelresistant material.
  • FIG. 4 shows still another modification of the check valves in which only the ball 54 FIG. 2 is replaced by a disc 66.
  • Spring 56, FIG, 2 is replaced by a pair of springs 68 and 70 separated by a perforated disc or washer 72 which may be movable upwardly from a shoulder 74.
  • FIGS. 3 and 4 show that the operationof the arrangements of FIGS. 3 and 4 are very similar to those of FIG. 2, except that the pressure on spring 70 produced by the retraction of disc 66 will not be communicated to ball valve 48 when washer 72 is seated.
  • a carburetor for an internal combustion engine comprising a body structure having at least one air/fuel mixture conduit therethrough, a throttle valve mounted across said conduit for movement from an open position to a position closing said conduit, means for supplying fuel to said conduit comprising a main fuel nozzle and a boost venturi positioned around the discharge end of said nozzle, an air valve mounted in the space between said boost venturi and the walls of said mixture conduit, said air valve being normally biased to a closed position whereby air flowing through said carburetor creates a reduced pressure or depression in said mixture conduit below said air valve, an accelerating pump containing fuel, a fuel passage for conveying fuel from said pump to said mixture conduit, an air vent communicating with said fuel passage, upper and lower valve seats in said fuel passage, an accelerating fuel discharge nozzle intermediate said valve seats and a valve assembly in said fuel passage, said valve assembly comprising upper and lower sealing members spaced apart by resilient spacing means, said spacing means having a length such that only one of said sealing members contacts a valve seat at any time, said air vent having a size

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  • 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)
US00241774A 1972-04-06 1972-04-06 Means preventing the extraction of fuel from the accelerating pump Expired - Lifetime US3802671A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US00241774A US3802671A (en) 1972-04-06 1972-04-06 Means preventing the extraction of fuel from the accelerating pump
AU53591/73A AU465430B2 (en) 1972-04-06 1973-03-21 Means preventing the extraction of fuel fromthe accelerating pump
CA167,311A CA989263A (en) 1972-04-06 1973-03-26 Means preventing the extraction of fuel from the accelerating pump
JP48035540A JPS497621A (enrdf_load_stackoverflow) 1972-04-06 1973-03-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00241774A US3802671A (en) 1972-04-06 1972-04-06 Means preventing the extraction of fuel from the accelerating pump

Publications (1)

Publication Number Publication Date
US3802671A true US3802671A (en) 1974-04-09

Family

ID=22912127

Family Applications (1)

Application Number Title Priority Date Filing Date
US00241774A Expired - Lifetime US3802671A (en) 1972-04-06 1972-04-06 Means preventing the extraction of fuel from the accelerating pump

Country Status (3)

Country Link
US (1) US3802671A (enrdf_load_stackoverflow)
JP (1) JPS497621A (enrdf_load_stackoverflow)
CA (1) CA989263A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3957929A (en) * 1974-05-09 1976-05-18 General Motors Corporation Carburetor having priming means
US4105720A (en) * 1975-08-15 1978-08-08 Hitachi, Ltd. Variable stage type carburetor
US4141940A (en) * 1977-12-27 1979-02-27 Acf Industries, Incorporated Carburetor fuel flow control
US4156704A (en) * 1977-12-27 1979-05-29 Acf Industries, Inc. Staged carburetor
US4170615A (en) * 1977-12-27 1979-10-09 Acf Industries, Inc. Carburetor with second choke break
US4387685A (en) * 1976-10-08 1983-06-14 Abbey Harold Fluidic control system including variable venturi
US6619632B2 (en) * 2001-08-03 2003-09-16 Honda Giken Kogyo Kabushiki Kaisha Choke valve device in carburetor
US20090184434A1 (en) * 2008-01-21 2009-07-23 Walbro Engine Management, L.L.C. Variable venturi carburetor
US8100384B1 (en) * 2009-06-01 2012-01-24 Hall Kendall L Carburetor system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55156234A (en) * 1979-05-25 1980-12-05 Hitachi Ltd Accelerating device for carburetor
JPS6371461U (enrdf_load_stackoverflow) * 1986-10-29 1988-05-13

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US24134A (en) * 1859-05-24 Egg-beater
US2207456A (en) * 1938-06-28 1940-07-09 Carter Carburetor Corp Carburetor structure
US2267570A (en) * 1940-09-24 1941-12-23 Carter Carburetor Corp Accelerating pump
US2406114A (en) * 1942-06-05 1946-08-20 Bendix Aviat Corp Carburetor
US2635863A (en) * 1950-09-23 1953-04-21 Gen Motors Corp Carburetor
US3347536A (en) * 1966-08-05 1967-10-17 Bendix Corp Carburetor
US3460813A (en) * 1967-01-19 1969-08-12 Robert Henry Hieger Vented acceleration discharge check valve
US3680846A (en) * 1971-01-08 1972-08-01 Acf Ind Inc Staged carburetor
US3715108A (en) * 1971-05-07 1973-02-06 Ford Motor Co Staged single venturi carburetor

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US24134A (en) * 1859-05-24 Egg-beater
US2207456A (en) * 1938-06-28 1940-07-09 Carter Carburetor Corp Carburetor structure
US2267570A (en) * 1940-09-24 1941-12-23 Carter Carburetor Corp Accelerating pump
US2406114A (en) * 1942-06-05 1946-08-20 Bendix Aviat Corp Carburetor
US2635863A (en) * 1950-09-23 1953-04-21 Gen Motors Corp Carburetor
US3347536A (en) * 1966-08-05 1967-10-17 Bendix Corp Carburetor
US3460813A (en) * 1967-01-19 1969-08-12 Robert Henry Hieger Vented acceleration discharge check valve
US3680846A (en) * 1971-01-08 1972-08-01 Acf Ind Inc Staged carburetor
US3715108A (en) * 1971-05-07 1973-02-06 Ford Motor Co Staged single venturi carburetor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3957929A (en) * 1974-05-09 1976-05-18 General Motors Corporation Carburetor having priming means
US4105720A (en) * 1975-08-15 1978-08-08 Hitachi, Ltd. Variable stage type carburetor
US4387685A (en) * 1976-10-08 1983-06-14 Abbey Harold Fluidic control system including variable venturi
US4141940A (en) * 1977-12-27 1979-02-27 Acf Industries, Incorporated Carburetor fuel flow control
US4156704A (en) * 1977-12-27 1979-05-29 Acf Industries, Inc. Staged carburetor
US4170615A (en) * 1977-12-27 1979-10-09 Acf Industries, Inc. Carburetor with second choke break
US6619632B2 (en) * 2001-08-03 2003-09-16 Honda Giken Kogyo Kabushiki Kaisha Choke valve device in carburetor
US20090184434A1 (en) * 2008-01-21 2009-07-23 Walbro Engine Management, L.L.C. Variable venturi carburetor
US7971858B2 (en) * 2008-01-21 2011-07-05 Walbro Engine Management, L.L.C. Variable venturi carburetor
US8100384B1 (en) * 2009-06-01 2012-01-24 Hall Kendall L Carburetor system

Also Published As

Publication number Publication date
CA989263A (en) 1976-05-18
JPS497621A (enrdf_load_stackoverflow) 1974-01-23
AU5359173A (en) 1974-09-26

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CARTER AUTOMOTIVE CORPORATION, INC., 9666 OLIVE BO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ACF INDUSTRIES, INCORPORATED;REEL/FRAME:004491/0867

Effective date: 19851212

AS Assignment

Owner name: CARTER AUTOMOTIVE COMPANY, INC., 9666 OLIVE BOULEV

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ACF INDUSTRIES, INCORPORATED;REEL/FRAME:004715/0162

Effective date: 19870410

Owner name: CARTER AUTOMOTIVE COMPANY, INC., MISSOURI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ACF INDUSTRIES, INCORPORATED;REEL/FRAME:004715/0162

Effective date: 19870410