US3814392A - Carburetor bowl vent - Google Patents

Carburetor bowl vent Download PDF

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Publication number
US3814392A
US3814392A US00291112A US29111272A US3814392A US 3814392 A US3814392 A US 3814392A US 00291112 A US00291112 A US 00291112A US 29111272 A US29111272 A US 29111272A US 3814392 A US3814392 A US 3814392A
Authority
US
United States
Prior art keywords
passage
float bowl
induction passage
fuel
bowl
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
US00291112A
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English (en)
Inventor
R Jones
W Boyd
D Dale
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.)
Ford Motor Co
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Ford Motor Co
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 Ford Motor Co filed Critical Ford Motor Co
Application granted granted Critical
Publication of US3814392A publication Critical patent/US3814392A/en
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
    • F02M5/00—Float-controlled apparatus for maintaining a constant fuel level
    • F02M5/08—Float-controlled apparatus for maintaining a constant fuel level having means for venting float chambers
    • 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
    • Y10S261/67—Carburetors with vented bowl

Definitions

  • a carburetor has an internal bowl vent comprising a passage of length substantially greater than the direct distance from the float bowl to the air horn to reduce pressure fluctuations in the float bowl.
  • FIG. 1 is a fragmentary cross-sectional view of a carburetor air horn and bowl vent embodying the invention
  • FIG. 2 is a plan view of the vent passage insert used in the construction of FIG. 1 takenon a plane and viewed in the direction of the arrows 2-2 of FIG. 1;
  • FIG. 3 is a graph showing the variation of fuel flow with changes in engine rpm at full load for the same engine and carburetor using (1 a conventional external vent, (2) a conventional internal vent, and (3) an internal vent embodying the invention.
  • a carburetor for an internal combustion engine in a motor vehicle includes an air horn portion 11 having the usual induction passage 2 through which air is admitted from an air cleaner to the intake manifold of the engine.
  • Fuel to be inducted into the carburetor in a known manner is supplied to a float bowl l2 and maintained at a constant level, also in a known manner.
  • the vapor space in the float chamber above the fuel level is closed except for a vent connected to thecarburetor air horn comprising a stack tube 13 and an insert having a maze passage 14.
  • the maze passage 14 is formed by an open sided worm-like channel 15 (FIG. 2) in a plastic insert 16 mounted in a suitable manner not shown in the upper part of the float bowl.
  • the under or open side of the insert is covered by a flat closuremember 17.
  • One end 18 of the mazepassage I4 communicates via a vertical passage with one end of the stack tube 13.
  • the other end 19 of the maze passage 14 opens into the vapor space in the top of the float bowl.
  • the fuel flow was calibrated over a range of different engine speeds at full load or wide open throttle conditions. first with an external bowl vent (curve 1), and then with a conventional internal bowl vent (curve 2).
  • the conventional internal bowl vent would consist merely of a connector like tube 13 in FIG. 1, without the maze 14.
  • the tube in FIG. 3, curve 2 was a stack tube 35 millimeters long and 4 millimeters internal diameter.
  • the conventional internal vent produced a hump in the fuel curve between 1,000 and 2,500 revolutions per minute.
  • the practical affect of this hump is that the engine is provided with a mixture that is too rich and its torque is reduced.
  • Curve 3 shows the affect of adding the maze insert 16 which increased the effective length of the internal vent passage from 35 millimeters to 260 millimeters.
  • the cross-sectional area of the undulating maze passage was equivalent to a diameter of 4 millimeters. It will readily be appreciated from FIG. 3 that the longer vent substantially reduces the hump in curve 2 and brings the fuel flow curve almost back to the levels found with an external bowl vent.
  • vent channel is less or greater than this optimum value by a significant amount the fuel flow will be too great in the critical 1,000 to 2,500 revolutions per minute.
  • the maze passage may alternatively be formed integrally with the upper body of the carburetor.
  • An internal vent for the float bowl of a carburetor having an induction passage for the flow of an air/fuel mixture therethrough connected to an air inlet at one end and adapted to be connected to an engine intake manifold at the other end, comprising, i
  • An internal vent for the float bowl of a carburetor having an induction passage for the flow of an air/fuel mixture therethrough connected to an air inlet at one end and adapted to be connected to an engine intake manifold at the other end, comprising,
  • An internal vent for the float bowl of a carburetor having an induction passage for the flow of an air/fuel mixture therethrough connected to an air inlet at one end and adapted to be connected to an engine intake manifold at the other end, comprising,
  • a vapor vent tube connecting the induction passage to the upper portion of the fuel bowl, the upper portion containing a winding maze-like passage extending along the upper portion in an essentially horizontal plane essentially at right angles to the induction passage for flow of fuel vapor in the same plane, the passage being connected at one end to the tube and at its other end to fuel vapor to provide a path for the flow of fuel vapor to be vented of an effective length substantially longer than the actual distance from the float bowl to the induction passage.
  • An internal vent for the float bowl of a carburetor having an induction passage for the flow of an air/fuel mixture therethrough connected to an air inlet at one end and adapted to be connected to an engine intake manifold at the other end, comprising,

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
US00291112A 1972-04-04 1972-09-21 Carburetor bowl vent Expired - Lifetime US3814392A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1527272 1972-04-04

Publications (1)

Publication Number Publication Date
US3814392A true US3814392A (en) 1974-06-04

Family

ID=10056112

Family Applications (1)

Application Number Title Priority Date Filing Date
US00291112A Expired - Lifetime US3814392A (en) 1972-04-04 1972-09-21 Carburetor bowl vent

Country Status (6)

Country Link
US (1) US3814392A (enrdf_load_html_response)
JP (1) JPS533459B2 (enrdf_load_html_response)
AU (1) AU449919B2 (enrdf_load_html_response)
CA (1) CA972241A (enrdf_load_html_response)
DE (1) DE2310873A1 (enrdf_load_html_response)
GB (1) GB1325655A (enrdf_load_html_response)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478764A (en) * 1982-03-04 1984-10-23 Toyota Jidoshi Kabushiki Kaisha Air valve type carburetor
US4726328A (en) * 1985-08-14 1988-02-23 Yamaha Hatsudoki Kabushiki Kaisha Induction system for vehicle powered by an air propeller
US5879595A (en) * 1997-03-19 1999-03-09 Holtzman; Barry L Carburetor internal vent and fuel regulation assembly
US8231110B2 (en) 2010-05-28 2012-07-31 Stoner Dale A Retrofit roll-over valve for carburetor float bowl vent tube

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5743071Y2 (enrdf_load_html_response) * 1977-02-25 1982-09-22
DE2952143C2 (de) * 1979-12-22 1982-12-09 Pierburg Gmbh & Co Kg, 4040 Neuss Auffangbehälter für den aus der Schwimmerkammer eines Vergasers austretenden flüssigen Brennstoff
JPS59147178A (ja) * 1983-02-12 1984-08-23 Toto Ltd 自動水栓
JPH0383280U (enrdf_load_html_response) * 1989-12-08 1991-08-23
JPH0483028A (ja) * 1990-07-25 1992-03-17 Tokai Rika Co Ltd 自動水洗装置
JPH03108071U (enrdf_load_html_response) * 1990-11-22 1991-11-07
DE4334702A1 (de) * 1993-10-12 1995-04-13 Opel Adam Ag Entlüftungseinrichtung einer Brennkraftmaschine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB769648A (en) * 1954-06-11 1957-03-13 Solex Improvements in balanced carburettors for internal combustion engines
US2894736A (en) * 1958-03-26 1959-07-14 Gen Motors Corp Carburetor vent system
GB833952A (en) * 1957-04-23 1960-05-04 Solex Improvements to carburation devices comprising a float-chamber for internal combustion engines
US3093124A (en) * 1960-12-23 1963-06-11 Gen Motors Corp Engine fuel vapor recovery system and method
US3343819A (en) * 1966-08-10 1967-09-26 Chrysler Corp Hot start vent and flame arrester for carburetor
US3456635A (en) * 1965-05-03 1969-07-22 Universal Oil Prod Co Means for preventing hydrocarbon losses from an engine carburetor system
US3460522A (en) * 1966-05-16 1969-08-12 Exxon Research Engineering Co Evaporation control device-pressure balance valve
US3728092A (en) * 1971-01-14 1973-04-17 J Gorman Petroleum oil vaporizer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB769648A (en) * 1954-06-11 1957-03-13 Solex Improvements in balanced carburettors for internal combustion engines
GB833952A (en) * 1957-04-23 1960-05-04 Solex Improvements to carburation devices comprising a float-chamber for internal combustion engines
US2894736A (en) * 1958-03-26 1959-07-14 Gen Motors Corp Carburetor vent system
US3093124A (en) * 1960-12-23 1963-06-11 Gen Motors Corp Engine fuel vapor recovery system and method
US3456635A (en) * 1965-05-03 1969-07-22 Universal Oil Prod Co Means for preventing hydrocarbon losses from an engine carburetor system
US3460522A (en) * 1966-05-16 1969-08-12 Exxon Research Engineering Co Evaporation control device-pressure balance valve
US3343819A (en) * 1966-08-10 1967-09-26 Chrysler Corp Hot start vent and flame arrester for carburetor
US3728092A (en) * 1971-01-14 1973-04-17 J Gorman Petroleum oil vaporizer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478764A (en) * 1982-03-04 1984-10-23 Toyota Jidoshi Kabushiki Kaisha Air valve type carburetor
US4726328A (en) * 1985-08-14 1988-02-23 Yamaha Hatsudoki Kabushiki Kaisha Induction system for vehicle powered by an air propeller
US5879595A (en) * 1997-03-19 1999-03-09 Holtzman; Barry L Carburetor internal vent and fuel regulation assembly
US8231110B2 (en) 2010-05-28 2012-07-31 Stoner Dale A Retrofit roll-over valve for carburetor float bowl vent tube

Also Published As

Publication number Publication date
CA972241A (en) 1975-08-05
JPS4913523A (enrdf_load_html_response) 1974-02-06
AU5093373A (en) 1974-06-27
JPS533459B2 (enrdf_load_html_response) 1978-02-07
GB1325655A (en) 1973-08-08
AU449919B2 (en) 1974-06-27
DE2310873A1 (de) 1973-10-18

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