US2296697A - Carburetor - Google Patents
Carburetor Download PDFInfo
- Publication number
- US2296697A US2296697A US348095A US34809540A US2296697A US 2296697 A US2296697 A US 2296697A US 348095 A US348095 A US 348095A US 34809540 A US34809540 A US 34809540A US 2296697 A US2296697 A US 2296697A
- Authority
- US
- United States
- Prior art keywords
- inlet
- idle
- carburetor
- fuel
- throat
- 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
Links
- 239000000446 fuel Substances 0.000 description 15
- 239000000203 mixture Substances 0.000 description 11
- 230000009977 dual effect Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
Images
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
- F02M3/00—Idling devices for carburettors
- F02M3/08—Other details of idling devices
- F02M3/09—Valves responsive to engine conditions, e.g. manifold vacuum
-
- 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
- F02M13/00—Arrangements of two or more separate carburettors; Carburettors using more than one fuel
- F02M13/02—Separate carburettors
- F02M13/04—Separate carburettors structurally united
- F02M13/046—Separate carburettors structurally united arranged in parallel, e.g. initial and main carburettor
Definitions
- Dual throat carburetors are in common use today and comprise a unit consisting of two carburetor devices under the control of a single set of throttle and choke devices.
- the usual practice in such dial throat carburetors is to provide a separate idle adjustment for each throat, and in practice it has been found extremely diflicult, if not impossible, to regulate each idle adjustment to the same extent so that uneven firing of the engine controlled thereby results.
- An object of the present invention is to provide means whereby the regulation of idling is achieved by adjustment of a single valve controlling the amount of air mixed with the fuel, which valve is adjacent the transfer and idle ports of a carburetor having such ports, and being so positioned as to control the richness of mixture when the engine is idling.
- Fig. 1 is a partially cut-away view in elevation of a dual throat carburetor having a form of the present invention applied thereto;
- Fig. 2 is a vertical section taken substantially along line 2-2 of Fig. 1 and looking in the direction of the arrows;
- Fig. 3 is a horizontal section taken substantially along line 3-3 of Fig. 1 and looking in the direction of the arrows.
- the present invention is applied to a dual throat carburetor I having the usual air inlet I I and choke device I2 under control of the usual choke operating mechanism.
- the carburetor is provided with a plurality of fuel inlet reservoirs I3 each of which feeds fuel into an associated throat I4 through the usual fuel inlet nozzle I5 and nozzle inlet I6. Fuel is sucked through the inlet I6 and nozzle I5 by the rush of air through a Venturi device broadly designated at I1.
- Incorporated in the inlet nozzle construction is a well I8 from which extends vertically an idle snatcher tube I9 having an outlet communicating with an idling passage 20 leading downward to the vicinity of the throttle valve 2
- Fuel is admitted to the idling passage 20 from the idle snatcher tube I9 by the aspirating effect of air drawn from the air inlet through an opening 22 at the upper end of the idling passage 20, which movement of air is induced by the engine suction on the fuel jet 23 which is located below the throttle valve 2
- a transfer port 24 opens into the throat I4 above the throttle valve 2
- each idle passage 20 is connected to a common passage 3U in which is located a needle valve 3
- is seated in a valve seat 33 at the side of passage 30 from which extend equally spaced Idle inlet ports 23 of equal size, each port leading into one of the throats I4.
- the transfer ports 24 are slightly above the throttle valve 2
- the transfer ports 24 through which air is admitted during idling operation became fuel injection ports when the throttle valve is opened slightly. Since it is the purpose of the transfer ports to feed fuel mixture to the engine in greater amount than required for idling prior to the time that the main inlet becomes effective it is desirable to increase the suction on the idle snatcher tube I9 at this moment.
- a dual carburetor having a plurality of mixture inlet throats each adapted to be connected to a different section of an internal combustion engine and a plurality of carbureting devices 5 each associated With one of saidlmixture inlet throats, a throttle valve in each mixture inlet throat, an idling fuel intake device associated with each carbureting device and including an inlet tube leading to an idle inlet port located in 10 throat at a point on the opposite side of said throttle valve when the throttle valve is closed and through which air is drawn into each inlet tube when the throttle valve is closed, a mixture regulating passage connecting said plurality of idle inlet tubes below said transfer ports, and a single adjusting valve in said passage including a valve seat with which said idle inlet ports communicate directly and a. needle Valve cooperating with said valve seat for manually variably predetermining the amount of fuel mixture admitted to each of said idle inlet ports during idling operation whereby the lamount of the mixture admitted through each of said idle inlet ports l5 may be equally and simultaneously adjusted.
Description
sept. 22, 1942. T, M. BALL 2,296,697
CARBURETOR Filed July 29, 1940 INVENTOR 7&0/7745 dZZ.
ATTORNEYS.
Patented Sept. 22, 1942 UNI-TED CRBURETOR T-lioinas- Ball, Detroit, Mich., f assigner to' Ballr` Ball Carburetor CompanydDetroitMichwav partnership Application July 29, 1940, serial Nc. 348,095
1 Claim.
`The present invention relates to the idling adjustment of a dual throat carburetor for internal y combustion engines. Dual throat carburetors are in common use today and comprise a unit consisting of two carburetor devices under the control of a single set of throttle and choke devices. The usual practice in such dial throat carburetors is to provide a separate idle adjustment for each throat, and in practice it has been found extremely diflicult, if not impossible, to regulate each idle adjustment to the same extent so that uneven firing of the engine controlled thereby results. It is the principal object of the present invention to place regulation of the idle discharge of the two throats of a dual throat carburetor under control of a single adjusting screw in order that exactly the same fuel and air mixture may be fed to each throat during idling operation of the engine.
An object of the present invention is to provide means whereby the regulation of idling is achieved by adjustment of a single valve controlling the amount of air mixed with the fuel, which valve is adjacent the transfer and idle ports of a carburetor having such ports, and being so positioned as to control the richness of mixture when the engine is idling.
The objects and advantages of the present invention should be more readily understood from the following specification taken in connection with the accompanying drawing which sets forth preferred embodiments of the invention and wherein like numerals refer to like parts throughout.
In the drawing,
Fig. 1 is a partially cut-away view in elevation of a dual throat carburetor having a form of the present invention applied thereto;
Fig. 2 is a vertical section taken substantially along line 2-2 of Fig. 1 and looking in the direction of the arrows;
Fig. 3 is a horizontal section taken substantially along line 3-3 of Fig. 1 and looking in the direction of the arrows.
The present invention is applied to a dual throat carburetor I having the usual air inlet I I and choke device I2 under control of the usual choke operating mechanism. The carburetor is provided with a plurality of fuel inlet reservoirs I3 each of which feeds fuel into an associated throat I4 through the usual fuel inlet nozzle I5 and nozzle inlet I6. Fuel is sucked through the inlet I6 and nozzle I5 by the rush of air through a Venturi device broadly designated at I1. Incorporated in the inlet nozzle construction is a well I8 from which extends vertically an idle snatcher tube I9 having an outlet communicating with an idling passage 20 leading downward to the vicinity of the throttle valve 2|. Fuel is admitted to the idling passage 20 from the idle snatcher tube I9 by the aspirating effect of air drawn from the air inlet through an opening 22 at the upper end of the idling passage 20, which movement of air is induced by the engine suction on the fuel jet 23 which is located below the throttle valve 2|. A transfer port 24 opens into the throat I4 above the throttle valve 2| when in closed position from the idle passage 2D for the purpose of admitting fuel mixture to the engine during transfer from idling to high speeds. The construction heretofore described is old and well known in the art and details thereof are accordingly not fully illustrated nor described.
In Figs. 1 and 3 it may be seen that each idle passage 20 is connected to a common passage 3U in which is located a needle valve 3| provided with the usual spring take-up 32. The needle valve 3| is seated in a valve seat 33 at the side of passage 30 from which extend equally spaced Idle inlet ports 23 of equal size, each port leading into one of the throats I4. As seen in Figs. 1 and 2 the transfer ports 24 are slightly above the throttle valve 2| so that air is drawn from air inlet into each tube 20 through the ports 24 and added to the fuel mixture passing therethrough. It can be seen from this construction that an equal quantity of identical proportions of fuel and air in idling amounts is admitted to each throat of the dual throat carburetor, and that the richness of the mixture may be controlled by regulating the single needle valve 3|.
In this form of the device the transfer ports 24 through which air is admitted during idling operation became fuel injection ports when the throttle valve is opened slightly. Since it is the purpose of the transfer ports to feed fuel mixture to the engine in greater amount than required for idling prior to the time that the main inlet becomes effective it is desirable to increase the suction on the idle snatcher tube I9 at this moment.
Having described the preferred embodiment of the present invention, it should` be apparent to those skilled in the art that the same permits of modification in arrangement and detail. All such modifications as come within the scope of the following claim are considered a part of my invention.
I claim:
A dual carburetor having a plurality of mixture inlet throats each adapted to be connected to a different section of an internal combustion engine and a plurality of carbureting devices 5 each associated With one of saidlmixture inlet throats, a throttle valve in each mixture inlet throat, an idling fuel intake device associated with each carbureting device and including an inlet tube leading to an idle inlet port located in 10 throat at a point on the opposite side of said throttle valve when the throttle valve is closed and through which air is drawn into each inlet tube when the throttle valve is closed, a mixture regulating passage connecting said plurality of idle inlet tubes below said transfer ports, and a single adjusting valve in said passage including a valve seat with which said idle inlet ports communicate directly and a. needle Valve cooperating with said valve seat for manually variably predetermining the amount of fuel mixture admitted to each of said idle inlet ports during idling operation whereby the lamount of the mixture admitted through each of said idle inlet ports l5 may be equally and simultaneously adjusted.
THOMAS M. BALL.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US348095A US2296697A (en) | 1940-07-29 | 1940-07-29 | Carburetor |
US429997A US2358435A (en) | 1940-07-29 | 1942-02-09 | Carburetor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US348095A US2296697A (en) | 1940-07-29 | 1940-07-29 | Carburetor |
Publications (1)
Publication Number | Publication Date |
---|---|
US2296697A true US2296697A (en) | 1942-09-22 |
Family
ID=23366615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US348095A Expired - Lifetime US2296697A (en) | 1940-07-29 | 1940-07-29 | Carburetor |
Country Status (1)
Country | Link |
---|---|
US (1) | US2296697A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2580294A (en) * | 1947-04-26 | 1951-12-25 | Called Solex S A R L Soc | Fuel injection carburetor |
US2757913A (en) * | 1953-10-30 | 1956-08-07 | Bendix Aviat Corp | Carburetor |
US2783981A (en) * | 1953-10-21 | 1957-03-05 | Briggs Res & Dev Inc | Production of combustible mixture of air and fuel vapor |
US2827269A (en) * | 1955-04-25 | 1958-03-18 | Holley Carburetor Co | Idle control system |
US2867422A (en) * | 1956-04-23 | 1959-01-06 | Gen Motors Corp | Carburetor idling mechanism |
US3058725A (en) * | 1958-04-30 | 1962-10-16 | Holley Carburetor Co | Adjustable idle air bypass |
US3061285A (en) * | 1962-10-30 | Fuel systems for internal combustion engines | ||
US3212485A (en) * | 1960-12-01 | 1965-10-19 | Auto Union Gmbh | Method and apparatus for operating internal combustion engines |
US4264535A (en) * | 1978-02-24 | 1981-04-28 | Toyo Kogyo Co., Ltd. | Fuel intake system for multi-cylinder internal combustion engine |
US5693262A (en) * | 1995-08-09 | 1997-12-02 | Percival; Jeffrey D. | Adjustable fuel metering adapter for carburetor |
-
1940
- 1940-07-29 US US348095A patent/US2296697A/en not_active Expired - Lifetime
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3061285A (en) * | 1962-10-30 | Fuel systems for internal combustion engines | ||
US2580294A (en) * | 1947-04-26 | 1951-12-25 | Called Solex S A R L Soc | Fuel injection carburetor |
US2783981A (en) * | 1953-10-21 | 1957-03-05 | Briggs Res & Dev Inc | Production of combustible mixture of air and fuel vapor |
US2757913A (en) * | 1953-10-30 | 1956-08-07 | Bendix Aviat Corp | Carburetor |
US2827269A (en) * | 1955-04-25 | 1958-03-18 | Holley Carburetor Co | Idle control system |
US2867422A (en) * | 1956-04-23 | 1959-01-06 | Gen Motors Corp | Carburetor idling mechanism |
US3058725A (en) * | 1958-04-30 | 1962-10-16 | Holley Carburetor Co | Adjustable idle air bypass |
US3212485A (en) * | 1960-12-01 | 1965-10-19 | Auto Union Gmbh | Method and apparatus for operating internal combustion engines |
US4264535A (en) * | 1978-02-24 | 1981-04-28 | Toyo Kogyo Co., Ltd. | Fuel intake system for multi-cylinder internal combustion engine |
US5693262A (en) * | 1995-08-09 | 1997-12-02 | Percival; Jeffrey D. | Adjustable fuel metering adapter for carburetor |
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