US1611792A - Carburetor - Google Patents

Carburetor Download PDF

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Publication number
US1611792A
US1611792A US643946A US64394623A US1611792A US 1611792 A US1611792 A US 1611792A US 643946 A US643946 A US 643946A US 64394623 A US64394623 A US 64394623A US 1611792 A US1611792 A US 1611792A
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United States
Prior art keywords
mixing chamber
valve
openings
throttle
carburetor
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Expired - Lifetime
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US643946A
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Sykes Stanley
Sykes Guy
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Individual
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Priority to US643946A priority Critical patent/US1611792A/en
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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
    • F02M7/12—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves
    • F02M7/22—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves fuel flow cross-sectional area being controlled dependent on air-throttle-valve position
    • 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
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
    • F02M31/045—Fuel-air mixture
    • F02M31/047—Fuel-air mixture for fuel enriched partial mixture flow path
    • 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
    • F02M9/00—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position
    • F02M9/08—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having throttling valves rotatably mounted in the passage
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • 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
    • Y10S261/53—Valve actuation

Definitions

  • This invention relates to improvements in internal combustion engines, and has particular reference to a carburetor therefor.
  • An object of the invention is to provide an improved carburetor of simple and practical construction, wherein the mixture of the fuel and air in the mixing chamber is automatically controlled by the operation of the throttle which regulates the speed of the engine.
  • Another object is to Provide a simple and effective means for automatically operating the needle valve to control the amount of fuel to be supplied to the mixing chamber.
  • FIG. 1 is a fragmentary side elevation of the carburetor constructed in accordance with the invention.
  • Figure 2 is a fragmentary top plan view
  • Figure 3 is a longitudinal section through the mixing chamber
  • Figure 41 is an elevational viejv, partly in section, and talren at right angles to ⁇ ligure 1;
  • Figure 5 is a side elevation of the choke valve employed in connection With the invention.
  • the carburetor is shown as comprising a body G to which is connected the float chamber 7 having a passage 8 leading therefrom and communicating With the passage 9 in the body 6, Which latter passage is controlled by the needle valve 10.
  • Communicating ⁇ with the passage 9 at a point adjacent the inner end of the needle valve is an air port 11, the size of which may be regulated by a set screw 12 and through which air may enter into the body of the carburetor to mix With the fuel from the float chamber as the same passes the needle valve and enters the outlet pipe 13.
  • this outlet pipe is extended into a section of the exhaust manifold 14 of an engine and terminates in a coil 15 Within said manifold, whereby the fuel conveyed through the pipe 1.2 is heated and vaporized upon passing through said coil 15. Also .connected to the coil 15 is an inlet pipe 16 which communicates with one end of a passage 17 in the body of the carbulaas. serial No. ceases.
  • rlhe nozzle 18 projects from the body 6 and into the mixing chamber 20 at the end of said hamber adjoining t-he'body. Intermediate the ends of the mixing chamber the same is provided on opposite sides thereof with air inlet Openings 21 through which air may enter into the chamber to mix with the vaporized fuel emitted from the nozzle 18 through the perferations 19 so as to provide a suable combustible mixture Which passes from the mixing chamber into the intake manifold of the engine to which the plate 22 is secured.
  • a choke valve 23 Rotatable Within the mixing chamber 2O is a choke valve 23, of substantially cylindrical formation, having one end cut to provide opposed flanges 24 each having an edge thereto disposed diagonally With respect to the longitudinal axis of the valve and arranged in a plane intersecting the diagonal edge of the other flange, as illustre-.ted in Fig. 5.
  • the valve is provided with an arm 25 which projects through the mixing chamber 2O and is movable in a slot 26 so that the valve may be rotated in the chamber.
  • Each of the flanges 24 of the valve cooperates with one of the openings 21 in the mixing chamber and is so formed that a rotation of the valve Within said chamber will cause the opening 21 to be enlarged or decreased according to the amount of air it is desired to have pass into the mixing chamber
  • This choke valve 23 utilized as an air adjustment independent of that effected by the control mechanism presently to be described.
  • the invention further provides a throttle sleeve 27 which is rotatably mounted upon the mixing chamber 20 and to which is connected a throttle rod 28 utilized to control rotation of the sleeve.
  • a throttle rod 28 utilized to control rotation of the sleeve.
  • lt will, of course, be understood that this throttle rod may be controlled in any desired manner to operate the throttle sleeve 2.7.
  • the sleeve 27 is provided with oppositely disposed openings 2S) therein, which register With the openings 21 in the mixing chamber, and as the sleeve 27 is rotated about said mixing chamber the size of the openings 2l will be varied to admit more or less air into said chamber.
  • the rotation of the sleeve 27 is also utilized to control the size of the aperture With Which the needle valve l() is associated, so that when the throttle is operated to increase the speed of the engine, said sleeve will operate the needle valve to enlarge the opening in the passage 9 through Which the fuel from the float chamber 7 tloivs. It will be understood that in thusoperating the throttle to increase the speed of the engine, the sleeve 27 will be rotated to enlarge the openings 2l and thus permit of more air entering the mixing chamber.
  • the means for accomplishing the control of the needle valve 10, preferably comprises a cam 30, formed integrally with one end of the sleeve 2T and engaging a roller 3l carried by the free end of a lever 32, pivoted 33 to a bracket 3e forming a part of the body 6.
  • rEhe upper end of the needle valve l() extends through a suitable opening formed in the lever and is threaded to receive the nuts 35 against one of which a spring 36 carried by the bracket Se is engaged to normally force the needle valve downwardly toward its seat and the lever 32 tovvar'd its normal position, thus maintaining the roller 3l in engagement with the periphery of the cam 30.
  • l. ln a carburetor', a body having a fuel orince, a mixing chamber having an air opening in each side, a fuel inlet in said chamber and eon'nnunicating With said oriiice, a needle valve controlling the orifice, a choke valve in the form of a hollow cylinder mounted to turn in the mixing chamber for varying the size of the openings thereof, a throttle valve in the form of a sleeve mounted to turn on the Walls of the mixing chamber and having an opening in each side adapted to register With the openings of the mixing chamber, and means for operating the needle valve from the throttle valve.
  • a carburetor a body having a fuel orifice, a mixing chamber havingl oppositely arranged air openings in its sides, a fuel inlet in said chamber and communicating with said orifice, a needle 'valve controlling the orifice, a tubular choke valve mounted to turn in the mixing chamber and having at one end opposed flanges for varying the size of the openings of the mixing chamber, each flange having an edge disposed diagonally with respect to the longitudinal axis, of the valve and arranged in a plane intersecting the diagonal edge of the other flange, a tubu# lar throttle valve mounted to turn on the Walls of the mixing chamber and provided with openings adapted to register with the openings thereof, and means for operating the needle valve from the throttle valve.
  • a carburetor a body having a fuel orifice, a needle valve controlling the orifice, a lever pivoted to the body and through which the valve stem projects, a roller on the free end of the lever, a spring secured to the. body and engaging the valve stem, a mixing chamber communicating with the fuel orilice, a tubular choke valve mounted to turn in the chamber for varying the size of the openings thereof, a sleeve throttle valve mountedL to turn on the Walls of the mixing chamber and having openings adapted to register with the openings thereof, and a cam on one end of the throttle valve and engaging the roller of said lever.

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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)

Description

Dec. 21 1926.
s. SYKES ET'AL CARBURETOR Filed June '7, 1923 2 Sheets-Sheet 1 ATTORNEYS Dec. 21,1926. 1 1,611,792
s. sYKEs ET Al.
GARBURETOR Filed June' v, 1923 2 sheets-'sheet' a ATTORNEYS WITNEssEs INVENToR Y .SYKL'S (j m v @.SYKES l BY Patented Bec 211, 192e?.
aura srafr STANLEY SYKES AlTD GUY SYKES, OF FLAGSTAFF, ARZONA.
CARBURETOR.
Application filed fune This invention relates to improvements in internal combustion engines, and has particular reference to a carburetor therefor.
An object of the invention is to provide an improved carburetor of simple and practical construction, wherein the mixture of the fuel and air in the mixing chamber is automatically controlled by the operation of the throttle which regulates the speed of the engine.
Another object is to Provide a simple and effective means for automatically operating the needle valve to control the amount of fuel to be supplied to the mixing chamber.
Ehe above and other objects will appear more clearly from the following detail description, `when talren in connection With the accompanying drawings, which illustrate a preferred embodiments of the inventive idea.
ln the drawings- Figm'e 1 is a fragmentary side elevation of the carburetor constructed in accordance with the invention;
Figure 2 is a fragmentary top plan view;
Figure 3 is a longitudinal section through the mixing chamber;
Figure 41 is an elevational viejv, partly in section, and talren at right angles to `ligure 1; and
Figure 5 is a side elevation of the choke valve employed in connection With the invention.
Referring more particularly to the accompanying drawings, the carburetor is shown as comprising a body G to which is connected the float chamber 7 having a passage 8 leading therefrom and communicating With the passage 9 in the body 6, Which latter passage is controlled by the needle valve 10. Communicating` with the passage 9 at a point adjacent the inner end of the needle valve is an air port 11, the size of which may be regulated by a set screw 12 and through which air may enter into the body of the carburetor to mix With the fuel from the float chamber as the same passes the needle valve and enters the outlet pipe 13. As shown in Figure 1, this outlet pipe is extended into a section of the exhaust manifold 14 of an engine and terminates in a coil 15 Within said manifold, whereby the fuel conveyed through the pipe 1.2 is heated and vaporized upon passing through said coil 15. Also .connected to the coil 15 is an inlet pipe 16 which communicates with one end of a passage 17 in the body of the carbulaas. serial No. ceases.
retor, the other end of which has connected thereto a nozzle 18 having a plurality of perforations 19 adjacent the free end thereof. Y
rlhe nozzle 18 projects from the body 6 and into the mixing chamber 20 at the end of said hamber adjoining t-he'body. Intermediate the ends of the mixing chamber the same is provided on opposite sides thereof with air inlet Openings 21 through which air may enter into the chamber to mix with the vaporized fuel emitted from the nozzle 18 through the perferations 19 so as to provide a suable combustible mixture Which passes from the mixing chamber into the intake manifold of the engine to which the plate 22 is secured. Rotatable Within the mixing chamber 2O is a choke valve 23, of substantially cylindrical formation, having one end cut to provide opposed flanges 24 each having an edge thereto disposed diagonally With respect to the longitudinal axis of the valve and arranged in a plane intersecting the diagonal edge of the other flange, as illustre-.ted in Fig. 5. The valve is provided with an arm 25 which projects through the mixing chamber 2O and is movable in a slot 26 so that the valve may be rotated in the chamber. Each of the flanges 24 of the valve cooperates with one of the openings 21 in the mixing chamber and is so formed that a rotation of the valve Within said chamber will cause the opening 21 to be enlarged or decreased according to the amount of air it is desired to have pass into the mixing chamber When the engine is first started or is being run during extremely cold weather. This choke valve 23 utilized as an air adjustment independent of that effected by the control mechanism presently to be described.
ln order to automatically control the quality of the mixture in accordance with the speed of the engine, the invention further provides a throttle sleeve 27 which is rotatably mounted upon the mixing chamber 20 and to which is connected a throttle rod 28 utilized to control rotation of the sleeve. lt will, of course, be understood that this throttle rod may be controlled in any desired manner to operate the throttle sleeve 2.7. The sleeve 27 is provided with oppositely disposed openings 2S) therein, which register With the openings 21 in the mixing chamber, and as the sleeve 27 is rotated about said mixing chamber the size of the openings 2l will be varied to admit more or less air into said chamber. The rotation of the sleeve 27 is also utilized to control the size of the aperture With Which the needle valve l() is associated, so that when the throttle is operated to increase the speed of the engine, said sleeve will operate the needle valve to enlarge the opening in the passage 9 through Which the fuel from the float chamber 7 tloivs. It will be understood that in thusoperating the throttle to increase the speed of the engine, the sleeve 27 will be rotated to enlarge the openings 2l and thus permit of more air entering the mixing chamber. The means for accomplishing the control of the needle valve 10, preferably comprises a cam 30, formed integrally with one end of the sleeve 2T and engaging a roller 3l carried by the free end of a lever 32, pivoted 33 to a bracket 3e forming a part of the body 6. rEhe upper end of the needle valve l() extends through a suitable opening formed in the lever and is threaded to receive the nuts 35 against one of which a spring 36 carried by the bracket Se is engaged to normally force the needle valve downwardly toward its seat and the lever 32 tovvar'd its normal position, thus maintaining the roller 3l in engagement with the periphery of the cam 30. The parts are shoivn in Figure l in the positions they assume ivhen the throttle is fully opened and the needle valve l0 is raised to its extreme upper position. lt Will thus be seen that when the throttle is actuated to decrease the speed of the engine the sleeve 27 will be rotated in a direction to diminish the size of the openings 2l and the cam 30 Will likewise be rotated to permit of a lowering of the needle valve l() and lever 32 under the influence of the spring 36, thus permitting the needle valve to move toward its seat to diminish the size of the orifice through which the fuel in the passage 9 flows.
llVhat is claimed is:
l. ln a carburetor', a body having a fuel orince, a mixing chamber having an air opening in each side, a fuel inlet in said chamber and eon'nnunicating With said oriiice, a needle valve controlling the orifice, a choke valve in the form of a hollow cylinder mounted to turn in the mixing chamber for varying the size of the openings thereof, a throttle valve in the form of a sleeve mounted to turn on the Walls of the mixing chamber and having an opening in each side adapted to register With the openings of the mixing chamber, and means for operating the needle valve from the throttle valve.
2. ln a carburetor, a body having a fuel orifice, a mixing chamber havingl oppositely arranged air openings in its sides, a fuel inlet in said chamber and communicating with said orifice, a needle 'valve controlling the orifice, a tubular choke valve mounted to turn in the mixing chamber and having at one end opposed flanges for varying the size of the openings of the mixing chamber, each flange having an edge disposed diagonally with respect to the longitudinal axis, of the valve and arranged in a plane intersecting the diagonal edge of the other flange, a tubu# lar throttle valve mounted to turn on the Walls of the mixing chamber and provided with openings adapted to register with the openings thereof, and means for operating the needle valve from the throttle valve.
3. ln a carburetor, a body having a fuel orifice, a needle valve controlling the orifice, a lever pivoted to the body and through which the valve stem projects, a roller on the free end of the lever, a spring secured to the. body and engaging the valve stem, a mixing chamber communicating with the fuel orilice, a tubular choke valve mounted to turn in the chamber for varying the size of the openings thereof, a sleeve throttle valve mountedL to turn on the Walls of the mixing chamber and having openings adapted to register with the openings thereof, and a cam on one end of the throttle valve and engaging the roller of said lever.
STANLEY SYKES, GUY SYKES.
US643946A 1923-06-07 1923-06-07 Carburetor Expired - Lifetime US1611792A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322376A (en) * 1980-10-20 1982-03-30 Hammons Carl A Carburetor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322376A (en) * 1980-10-20 1982-03-30 Hammons Carl A Carburetor

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