US3333833A - Carburetor - Google Patents

Carburetor Download PDF

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Publication number
US3333833A
US3333833A US443355A US44335565A US3333833A US 3333833 A US3333833 A US 3333833A US 443355 A US443355 A US 443355A US 44335565 A US44335565 A US 44335565A US 3333833 A US3333833 A US 3333833A
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US
United States
Prior art keywords
idle
tube
passage
fuel
carburetor
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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
US443355A
Inventor
Elmer M Bimberg
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Bendix Corp
Original Assignee
Bendix Corp
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Filing date
Publication date
Application filed by Bendix Corp filed Critical Bendix Corp
Priority to US443355A priority Critical patent/US3333833A/en
Priority to JP41018763A priority patent/JPS495122B1/ja
Priority to GB13898/66A priority patent/GB1140547A/en
Application granted granted Critical
Publication of US3333833A publication Critical patent/US3333833A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F02M7/103—Other installations, without moving parts, for influencing fuel/air ratio, e.g. electrical means with self-acting equaliser jets
    • 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
    • F02M3/00—Idling devices for carburettors
    • F02M3/08—Other details of idling devices
    • 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
    • F02M7/02—Carburettors having aerated fuel spray nozzles
    • 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
    • F02M7/23—Fuel aerating devices

Definitions

  • the idle air bleed is provided
  • a slugging effect has been noted on occasions. The slugging effect manifests itself by irregular operation of the engine at idle and is attributed to solid slugs of fuel being discharged through the idle system.
  • numeral designatc s a carburetor having a 'body 12 and induction passage 14 therethrough containing a choke valve 16 and a throttle valve 18 mounted therein on opposite sides of an air nozzle or venturi 20.
  • a fuel 'bowl 22 is secured to body 12 by suitable means (not shown) and contains an annular float 24 which controls the level of fuel in bowl 22 by regulating suitable Valve means (not shown).
  • a main fuel discharge jet 26 is mounted in a fuel well 28 with its 'discharge end 30 disposed to discharge fuel into the throat of the air nozzle or venturi 20.
  • Fuel is supplied to main jet 26 from fuel bowl 22 by passages 32 in nut 34, fixed restriction 36, idle tube 38, and port 40 in tube 38.
  • Air from induction passage 14 is brought through main jet air bleed passage 42 to passage 44 between the jet 26 and well 28 and through perforations 46 to form a fuelair emulsion in main jet 26 prior to discharge from the end 30.
  • Patented Aug. I, 1967 ICC Idle tube 38 is preferably, but not necessarily, coaxial with main jet 26 and extends transverse the induction passa-ge 14 through a bore or passage 47 in the nozzle or venturi 20.
  • One end 49 of idle tube 38 is secured to adjustable nut 48 threadedly mounted in body 12. Rotation of the adjustable nut 48 moves idle tube 38 axially in main jet 26 to bring port 40 into vaiiable registration with a wall 50 formed in main jet 26.
  • the port 40 constitutes the main metering restriction, the area of which may be regulated through variable registration with Wall 50.
  • Idle tube 38 is provided with a plurality of fuel discharge ports 52 which communicate with idle passage 54 formed in the side wall of the carburetor body 12.
  • a plurality of discharge ports 56, 58 and 60 connect idle passage 54 with the induction passage.
  • An adjustable needle valve 62 controls the area of -discharge port 60.
  • the bore or passage 47 is larger than the idle fuel tube 38 and the clearance 64 'between the passage 47 and the tube 38 forms an annular idle air bleed in communication with the induction passage. Air passing through annular air bleed 64 sweeps all around idle tube 38 and is brought into intimate and turbulent contact with fuel discharged through port means 52.
  • Passage means 54 connects port means 52 and idle air bleed 64 to the discharge ports 56, 58 and 60 from which the idle fuel is discharged in a highly atomized state.
  • a carburetor having a fuel 'bowl and induction passage with a throttle therein, a main fuel discharge jet communicating with said induction passage at a nozzle portion of restricted cross section, an idle tube transversely mounted in said induction passage, an annular idle air 'bleed surrounding said idle tube and communicating with said nozzle at substantially the same cross sectional portion of said nozzle wherein said main fuel discharge jet communicates, means connecting said tube to said fuel bowl, fuel discharge port means in said idle tube adjacent said idle air bleed, and passage means connecting said port means and idle air bleed to the induction passage downstream of said throttle.
  • a carburetor having a fuel bowl and induction passage with an air nozzle of restricted cross section and a throttle therein, a transverse passage formed in said nozzle, conduit means connecting said transverse passage with the induction passage 'downstream of said throttle, an idle tube extending across said induction passage into said transverse passage and being radially spaced therefrom, means connecting said idle tube to said fuel bowl and port means in said tube adapted to discharge into said transverse passage.

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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)
  • Means For Warming Up And Starting Carburetors (AREA)

Description

Aug- 1, 1967 E. M. BIMBERG 3,333,833
CARBURETOR Filed March 29. 1965 IN VEN TOR.
United States Patent O 3,333,833 CARBURETOR Elmer M. Bimberg, Detroit, Mich., assignor to The Bendix Corporation, Detroit, Mich., a Corporation of Dela- Ware Filed Mar. 29, 1965, Ser. No. 443,355 2 Claims. (Cl. 261-41) ABSTRACT OF THE DISCLOSURE The presentl inventon relates -generally to carburetors and more particularly to an improved idle system for carburetors.
The present inventon is an mprovement over the idle system shown in Patent No. 3,269,712 issued Aug. 30, 1966, for Carburetor, and assigned to the assignee of the present inventon.
In the prior application, the idle air bleed is provided |by drilling one or more holes in the idle fuel tube and exposing the drilled holes to the induction passage. In the operation of the carburetor disclosed in the prior application, a slugging effect has been noted on occasions. The slugging effect manifests itself by irregular operation of the engine at idle and is attributed to solid slugs of fuel being discharged through the idle system.
It is an object of the present inventon to provide in a carburetor an improved idling system wherein the idle air bleed system more completely atomizes the idle fuel supplied to the engine.
It is a further object of the present inventon to provide a carburetor having an improved idle system which is simple in construction and relatively inexpensive to manufacture.
These and other objects and advantages of the present inventon will become readily apparent from the following detailed description taken in connection with the appended drawings in which the single figure is a sectional view of a carburetor embodying the present inventon.
Referring now to the drawings, numeral designatcs a carburetor having a 'body 12 and induction passage 14 therethrough containing a choke valve 16 and a throttle valve 18 mounted therein on opposite sides of an air nozzle or venturi 20. A fuel 'bowl 22 is secured to body 12 by suitable means (not shown) and contains an annular float 24 which controls the level of fuel in bowl 22 by regulating suitable Valve means (not shown). A main fuel discharge jet 26 is mounted in a fuel well 28 with its 'discharge end 30 disposed to discharge fuel into the throat of the air nozzle or venturi 20. Fuel is supplied to main jet 26 from fuel bowl 22 by passages 32 in nut 34, fixed restriction 36, idle tube 38, and port 40 in tube 38. Air from induction passage 14 is brought through main jet air bleed passage 42 to passage 44 between the jet 26 and well 28 and through perforations 46 to form a fuelair emulsion in main jet 26 prior to discharge from the end 30.
Patented Aug. I, 1967 ICC Idle tube 38 is preferably, but not necessarily, coaxial with main jet 26 and extends transverse the induction passa-ge 14 through a bore or passage 47 in the nozzle or venturi 20. One end 49 of idle tube 38 is secured to adjustable nut 48 threadedly mounted in body 12. Rotation of the adjustable nut 48 moves idle tube 38 axially in main jet 26 to bring port 40 into vaiiable registration with a wall 50 formed in main jet 26. The port 40 constitutes the main metering restriction, the area of which may be regulated through variable registration with Wall 50.
Idle tube 38 is provided with a plurality of fuel discharge ports 52 which communicate with idle passage 54 formed in the side wall of the carburetor body 12. A plurality of discharge ports 56, 58 and 60 connect idle passage 54 with the induction passage. An adjustable needle valve 62 controls the area of -discharge port 60. The bore or passage 47 is larger than the idle fuel tube 38 and the clearance 64 'between the passage 47 and the tube 38 forms an annular idle air bleed in communication with the induction passage. Air passing through annular air bleed 64 sweeps all around idle tube 38 and is brought into intimate and turbulent contact with fuel discharged through port means 52. Passage means 54 connects port means 52 and idle air bleed 64 to the discharge ports 56, 58 and 60 from which the idle fuel is discharged in a highly atomized state.
Although the present inventon has been described with reference to a preferred embodiment, it will be readily apparent to one skilled in the art that various modifications can be made without departing from the spirit of the inventon.
I claim:
1. A carburetor having a fuel 'bowl and induction passage with a throttle therein, a main fuel discharge jet communicating with said induction passage at a nozzle portion of restricted cross section, an idle tube transversely mounted in said induction passage, an annular idle air 'bleed surrounding said idle tube and communicating with said nozzle at substantially the same cross sectional portion of said nozzle wherein said main fuel discharge jet communicates, means connecting said tube to said fuel bowl, fuel discharge port means in said idle tube adjacent said idle air bleed, and passage means connecting said port means and idle air bleed to the induction passage downstream of said throttle.
2. In a carburetor having a fuel bowl and induction passage with an air nozzle of restricted cross section and a throttle therein, a transverse passage formed in said nozzle, conduit means connecting said transverse passage with the induction passage 'downstream of said throttle, an idle tube extending across said induction passage into said transverse passage and being radially spaced therefrom, means connecting said idle tube to said fuel bowl and port means in said tube adapted to discharge into said transverse passage.
References Cited UNITED STATES PATENTS 2,656,l66v 10/1953 Foster 261-41 2,656,167 `10/ 1953 Phillips 261-41 2,827,272 3/1958 Phillips 26l 41 3,233,878 2/1966 Phillips 261-41 X HARRY B. THORNTON, Primary Examner. TIM R. MILES, Assistant Examiner.

Claims (1)

1. A CARBURETOR HAVING A FUEL BOWL AND INDUCTION PASSAGE WITH A THROTTLE THEREIN, A MAIN FUEL DISCHARGE JET COMMUNICATING WITH SAID INDUCTION PASSAGE AT A NOZZLE PORTION OF RESTRICTED CROSS SECTION, AN IDLE TUBE TRANSVERSELY MOUNTED IN SAID INDUCTION PASSAGE, AN ANNULAR IDLE AIR BLEED SURROUNDING SAID IDLE TUBE AND COMMUNICATING WITH SAID NOZZLE AT SUBSTANTIALLY THE SAME CROSS SECTIONAL PORTION OF SAID NOZZLE WHEREIN SAID MAIN FUEL DISCHARGE JET COMMUNICATES, MEANS CONNECTING SAID TUBE TO SAID FUEL BOWL, FUEL DISCHARGE PORT MEANS IN SAID IDLE TUBE ADJACENT SAID IDLE AIR BLEED, AND PASSAGE MEANS CONNECT-
US443355A 1965-03-29 1965-03-29 Carburetor Expired - Lifetime US3333833A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US443355A US3333833A (en) 1965-03-29 1965-03-29 Carburetor
JP41018763A JPS495122B1 (en) 1965-03-29 1966-03-28
GB13898/66A GB1140547A (en) 1965-03-29 1966-03-29 Carburetor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US443355A US3333833A (en) 1965-03-29 1965-03-29 Carburetor

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US3333833A true US3333833A (en) 1967-08-01

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JP (1) JPS495122B1 (en)
GB (1) GB1140547A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3711069A (en) * 1969-08-15 1973-01-16 Ford Motor Co High velocity carburetor idle system
US3761063A (en) * 1970-04-16 1973-09-25 Toyo Kogyo Co Carburetor provided with auxiliary fuel feed means
US4007237A (en) * 1975-04-19 1977-02-08 Toyota Jidosha Kogyo Kabushiki Kaisha Compensation apparatus for carburetor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2656166A (en) * 1949-07-12 1953-10-20 Tillotson Mfg Co Charge forming device
US2656167A (en) * 1950-02-06 1953-10-20 Tillotson Mfg Co Charge forming device
US2827272A (en) * 1955-05-27 1958-03-18 Tillotson Mfg Co Charge forming device
US3233878A (en) * 1961-08-25 1966-02-08 Tillotson Mfg Co Charge forming apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2656166A (en) * 1949-07-12 1953-10-20 Tillotson Mfg Co Charge forming device
US2656167A (en) * 1950-02-06 1953-10-20 Tillotson Mfg Co Charge forming device
US2827272A (en) * 1955-05-27 1958-03-18 Tillotson Mfg Co Charge forming device
US3233878A (en) * 1961-08-25 1966-02-08 Tillotson Mfg Co Charge forming apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3711069A (en) * 1969-08-15 1973-01-16 Ford Motor Co High velocity carburetor idle system
US3761063A (en) * 1970-04-16 1973-09-25 Toyo Kogyo Co Carburetor provided with auxiliary fuel feed means
US4007237A (en) * 1975-04-19 1977-02-08 Toyota Jidosha Kogyo Kabushiki Kaisha Compensation apparatus for carburetor

Also Published As

Publication number Publication date
GB1140547A (en) 1969-01-22
JPS495122B1 (en) 1974-02-05

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