US2212926A - Carburetor - Google Patents

Carburetor Download PDF

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Publication number
US2212926A
US2212926A US99449A US9944936A US2212926A US 2212926 A US2212926 A US 2212926A US 99449 A US99449 A US 99449A US 9944936 A US9944936 A US 9944936A US 2212926 A US2212926 A US 2212926A
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US
United States
Prior art keywords
fuel
reservoir
carburetor
passage
inlet
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
US99449A
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English (en)
Inventor
Emil O Wirth
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.)
Bendix Aviation Corp
Original Assignee
Bendix Aviation Corp
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 Bendix Aviation Corp filed Critical Bendix Aviation Corp
Priority to US99449A priority Critical patent/US2212926A/en
Priority to GB23554/37A priority patent/GB501651A/en
Priority to FR828154D priority patent/FR828154A/fr
Application granted granted Critical
Publication of US2212926A publication Critical patent/US2212926A/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
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • 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
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/43—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel
    • F02M2700/4302—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit
    • F02M2700/4304—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit working only with one fuel
    • F02M2700/4311—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit working only with one fuel with mixing chambers disposed in parallel

Definitions

  • This invention relates to carburetors, and has for its object to improve the operating characteristics of carburetors, more particularly those used on automotive vehicles.
  • a further object of the invention is to provide a fuel reservoir of improved construction, which will minimize surging due to tilting and to acceleration, whether positive or negative acceleration, or acceleration toward the center of a circle, as l occurs when the vehicle to which the carburetor is attached is turning a corner.
  • Another object of the invention is to provide a carburetor which will have increased eiiiciency and economy of fuel, and which may be built at l minimum cost.
  • Figure 1 is a side elevation of a carburetor embodying the invention
  • Figure 2 is a vertical section taken on the line 2-2 of Figure l;
  • Figure 3 is a horizontal section taken on the line ⁇ 3-3 of Figure 1;
  • FIG. 4 is a fragmentary section taken on the line 4-4 of Figure 3;
  • Figure 5 is a section taken on the line 5-5 of Figure 3;
  • Figure 6 is a section taken on the line 6--6 ofl Figure 3;
  • Figure 'l is a fragmentary section taken on the line 1-1 of Figure 3;
  • FIG. 8 is a fragmentary section taken on the line 8-8 of Figure 3.
  • the carburetor disclosed therein is of the downdraft, double-barrel type, although the invention may be applied to other types of carburetors. It includes an air horn section I0 and a main body section l2, both preferably formed by die-casting; and a throttle body section I4, preferably formed by sand-casting, designed to be connected to the intake manifold I6 but separated therefrom by a heat-insulating gasket I8.
  • Section I0 forms an air inlet 20 which is controlled by a choke valve 22 of any suitable construction, manipulated either manually or auto# matically in the known manner.
  • a choke valve 22 of any suitable construction, manipulated either manually or auto# matically in the known manner.
  • the walls of the induction passage are ared as indicated at 23 and the passage then branches into two mixture passages 24 controlled by throttle valves 26 mounted on a common shaft 21 and controlled by means hereinafter described.
  • Each passage 24 comprises a smaller .venturi 28 supplied with fuel from a fuel nozzle 30 and discharging into a larger venturi 32.
  • Figure 4 shows construction and arrangement of the fuel nozzles in Figure 4, and may be similar to that shown in the copending application of Frank C. Mock, S. N. 98,680, filed AugustSl, 1936.
  • each nozzle is provided with a calibrated fuel metering restriction 35 positioned in a threaded plug 36 which projects from a boss 31 formed integral with the main'body section l2.
  • the nozzle is also provided with an air-bleeding and gas-separating chamber 38, all as more fully described in said Mock' application.
  • Fuel is supplied to the main nozzles at constant head by means of a constant-level fuel reservoir which extends entirely around the venturis 32 and includes float compartments 40 and 4
  • a constant-level fuel reservoir which extends entirely around the venturis 32 and includes float compartments 40 and 4
  • An acceleration pump is incorporated in *he carburetor, and comprises a piston 53 having a piston rod 54 and slidable in a cylinder 55 which is formed integral with a partition wall 56 which completely obstructs communication between chambers 44 and 46.
  • the acceleration pump discharges through a pressure actuated outlet valve 51 of known construction, which also serves as an economizer valve.
  • 'I'he valve 51 connects with discharge tubes 58 leading into the venturis 28.
  • a cylindrical recess 59 in chamber 46 is designed to receive a vacuum-actuated economizer valve (not shown) in cases where it is deemed advisable to incorporate this type of economizer in the carburetor.
  • the inlet of the pump is formed by a cross passage 60 which communicates with both of chambers 44 and 46 and, as shown in Figure 7, leads to a well 6I which leads through a check valve 62 to the cylinder 55.
  • Removablev plugs 63 at the bases of chambers 44 and 46 permit insertion and removal of the nozzles 30 and form fuel wells 64 of small capacity at the lowermost portions of chambers 44 and 46.
  • Idling fuel for each mixture passage 24 is drawn from the nozzle 30 through a lateral passage 65, thence upwardly through an idling tube 66 to a point above the normal fuel level in the carburetor (indicated by the line L-L in Figure 2), and thence downwardly through a passage 61 to an idling nozzle 68, of known construction, discharging adjacent the throttle 26.
  • Air is bled into the idling fuel through a passage leading from the air inlet of the carburetor to a calibrated member
  • 2 which is mounted below the carorifice 12 positioned above the normal fuel level.
  • 2 which is mounted below the carorifice 12 positioned above the normal fuel level.
  • 2 which is mounted below the carorifice 12 positioned above the normal fuel level.
  • 2 which is mounted below the carorifice 12 positioned above the normal fuel level.
  • 2 which is mounted below the
  • Floats 16 are mounted in compartments 40 and 4
  • a valve cage 86 also depends from section
  • the float valve mechanism just described is mounted in a bay 92 ⁇ of the fuel reservoir, and controls the inflow of fuel through inlet 94 to maintain the fuel in the reservoir at a constant level.
  • the throttle control mechanism is best shown in Figure 1, and comprises a lever 96 fixed to throttle shaft 21 and connected through an overrunning connection to a rod 98 which is actuated by the accelerator pedal in the known manner. 'Ihe usual return spring is indicated diagrammatically at
  • 08 of the lever 96 is provided with a stop screw
  • l8 on the carburetor is designed to contact with an ear
  • the head of fuel at the plugs 36 will be decreased some- What, but the inertia effect on the columns of fuel within the nozzles 30 will tend to compensate for this effect, so that the supply of fuel issuing from the main nozzles will be maintained at or about normal.
  • Another factor opposing this tendency is the relatively small capacity of passage 42, which, under the conditions mentioned, causes the fuel level therein to quickly rise to a point where a condition of dynamic equilibrium is quickly reached between the fuel level in the passage and that at other points in the oat chamber.
  • a carburetor comprising a vertical induction passage of elongated cross-section having its shorter dimension extending in the normal direction of movement of the vehicle, a fuel reservoir extending substantially around said induction passage and comprising a pair of fuel compartments of relatively large capacity positioned laterally of the induction passage, level-controlling members in said compartments, a passage of relatively small capacity connecting said compartments, baflies forming a pair of fuel chambers separated from each other by a partition and from the remainder of the reservoir by restricted passages, and nozzles connecting the chambers with the induction passage.
  • each of the fuel chambers comprises a well of small capacity at the lower-most point thereof, and the nozzles extend into said wells.
  • annular fuel reservoir In a carburetor for an automotive vehicle, an annular fuel reservoir, an induction passage extending vertically through the fuel reservoir, said reservoir comprising a pair of fuel wells separated from each other by a partition extending across one side of the reservoir and communicating with the remainder of the reservoir by restricted passages, and inclined fuel nozzles leading' from the fuel wells to the induction passage.
  • an annular constant level fuel reservoir a pair of induction passages extending vertically through the fuel reservoir, said reservoir including a pair of vertically extending fuel wells of relatively small capacity and crosssectional area compared to that of the entire reservoir, each of said wells having restricted communication with the remainder of the reservoir whereby the fuel level therein will not be materially changed upon sudden acceleration of the carburetor in a substantially horizontal plane, and a pair of main fuel nozzles having metering restrictions therein extending from the Wells to the induction passages, said fuel wells being positioned in the forward portion of the fuel reservoir and the reservoir opposite said fuel wells consisting of a ⁇ narrow passage of relatively low capacity.
  • a vertical induction passage of elongated crosssection having its shorter dimension extending in the normal direction of movement of the vehicle; an annular fuel reservoir surrounding said induction passage comprising a pair of fuel compartments of relatively large capacity positioned at opposite sides of the induction passage, a passage of relatively small capacity connecting the fuel compartments, and a pair of fuel chambers of relatively small capacity separated from each other by a partition extending across one side of the reservoir and communicating with!
  • an annular fuel reservoir In a carburetor, an annular fuel reservoir, a downdraft induction passage extending through said reservoir, a fuel inlet to said reservoir, interconnected floats positioned at opposite sides of the reservoir controlling the inlet, a main fuel nozzle having an inlet in the forward portion of said reservoir and discharging into the induction passage, and vertically extending wall structure forming a partition in said reservoir and partially surrounding said fuel nozzle inlet to form a chamber of limited capacity and small cross-sectional area having restricted communication with the remainder of the fuel reservoir.
  • a carburetor for an automotive vehicle a constant level annular fuel reservoir, a vertical induction passage extending through said reservoir, a main fuel nozzle connecting said reservoir with the induction passage and having a metering restriction therein, a wall partially surrounding the inlet to said nozzle for forming a vertically extending fuel well of limited capacity and cross-sectional area, said well having restricted communication with the remainder of said reservoir whereby the effective fuel level at said inlet will not be materially changed upon sudden acceleration of the carburetor in a substantially horizontal plane, fuel inlet to said reservoir at a point spaced fromgsaid fuel well, a valve in said inlet, and means responsive-tothe level of the fuel in the reservoir for controlling said valve.

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)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
US99449A 1936-09-04 1936-09-04 Carburetor Expired - Lifetime US2212926A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US99449A US2212926A (en) 1936-09-04 1936-09-04 Carburetor
GB23554/37A GB501651A (en) 1936-09-04 1937-08-27 Improvements in carburetters for internal combustion engines
FR828154D FR828154A (fr) 1936-09-04 1937-08-30 Perfectionnements aux carburateurs pour moteurs à combustion interne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US99449A US2212926A (en) 1936-09-04 1936-09-04 Carburetor

Publications (1)

Publication Number Publication Date
US2212926A true US2212926A (en) 1940-08-27

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ID=22275056

Family Applications (1)

Application Number Title Priority Date Filing Date
US99449A Expired - Lifetime US2212926A (en) 1936-09-04 1936-09-04 Carburetor

Country Status (3)

Country Link
US (1) US2212926A (fr)
FR (1) FR828154A (fr)
GB (1) GB501651A (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556463A (en) * 1944-12-26 1951-06-12 Carter Carburetor Corp Carburetor for submersible vehicles
US2613658A (en) * 1946-01-15 1952-10-14 Carter Carburetor Corp Charge forming device
US2624558A (en) * 1948-10-27 1953-01-06 Thompson Prod Inc Supplementary fuel feed device
US2628085A (en) * 1948-11-08 1953-02-10 John T Rauen Carburetor
US2628826A (en) * 1948-07-08 1953-02-17 Carter Carburetor Corp Antisurge carburetor
US2635625A (en) * 1948-08-04 1953-04-21 Carter Carburetor Corp Fuel supply device
US2655359A (en) * 1949-11-19 1953-10-13 Bendix Aviat Corp Carburetor
US2702185A (en) * 1950-10-23 1955-02-15 Lavin Jose Domingo Carburetor
US2718386A (en) * 1951-09-05 1955-09-20 Carter Carburetor Corp Fuel supply chamber for multi-barrel carburetors
US2757914A (en) * 1953-09-02 1956-08-07 Chrysler Corp Carburetor
US2793634A (en) * 1951-04-02 1957-05-28 Acf Ind Inc Automatic starting device
US2796242A (en) * 1954-05-20 1957-06-18 Chrysler Corp Carburetor
US2828952A (en) * 1952-04-11 1958-04-01 Bendix Aviat Corp Carburetor
US2914307A (en) * 1955-09-29 1959-11-24 Acf Ind Inc Carburetor construction
USD721389S1 (en) * 2014-01-08 2015-01-20 Holley Performance Products Inc. Carburetor main body

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2771282A (en) * 1951-12-29 1956-11-20 Gen Motors Corp Carburetor
FR1339530A (fr) * 1962-05-17 1963-10-11 Zenith Carburateur Soc Du Perfectionnements aux carburateurs
CN116006359B (zh) * 2023-03-28 2023-07-18 北京凌空天行科技有限责任公司 液体燃料储箱阀门控制方法、控制系统和气泡检测装置

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556463A (en) * 1944-12-26 1951-06-12 Carter Carburetor Corp Carburetor for submersible vehicles
US2613658A (en) * 1946-01-15 1952-10-14 Carter Carburetor Corp Charge forming device
US2628826A (en) * 1948-07-08 1953-02-17 Carter Carburetor Corp Antisurge carburetor
US2635625A (en) * 1948-08-04 1953-04-21 Carter Carburetor Corp Fuel supply device
US2624558A (en) * 1948-10-27 1953-01-06 Thompson Prod Inc Supplementary fuel feed device
US2628085A (en) * 1948-11-08 1953-02-10 John T Rauen Carburetor
US2655359A (en) * 1949-11-19 1953-10-13 Bendix Aviat Corp Carburetor
US2702185A (en) * 1950-10-23 1955-02-15 Lavin Jose Domingo Carburetor
US2793634A (en) * 1951-04-02 1957-05-28 Acf Ind Inc Automatic starting device
US2718386A (en) * 1951-09-05 1955-09-20 Carter Carburetor Corp Fuel supply chamber for multi-barrel carburetors
US2828952A (en) * 1952-04-11 1958-04-01 Bendix Aviat Corp Carburetor
US2757914A (en) * 1953-09-02 1956-08-07 Chrysler Corp Carburetor
US2796242A (en) * 1954-05-20 1957-06-18 Chrysler Corp Carburetor
US2914307A (en) * 1955-09-29 1959-11-24 Acf Ind Inc Carburetor construction
USD721389S1 (en) * 2014-01-08 2015-01-20 Holley Performance Products Inc. Carburetor main body

Also Published As

Publication number Publication date
GB501651A (en) 1939-02-27
FR828154A (fr) 1938-05-11

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