US3291462A - Carburetors comprising an automatic auxiliary starting device - Google Patents

Carburetors comprising an automatic auxiliary starting device Download PDF

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Publication number
US3291462A
US3291462A US551068A US55106866A US3291462A US 3291462 A US3291462 A US 3291462A US 551068 A US551068 A US 551068A US 55106866 A US55106866 A US 55106866A US 3291462 A US3291462 A US 3291462A
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United States
Prior art keywords
throttle valve
lever
mass
pipe
volume
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Expired - Lifetime
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US551068A
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English (en)
Inventor
Mennesson Andre Louis
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Societe Industrielle de Brevets et dEtudes SIBE
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Societe Industrielle de Brevets et dEtudes SIBE
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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
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/08—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically
    • F02M1/10—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically dependent on engine temperature, e.g. having thermostat

Definitions

  • the invention relates to internal combustion engine carburetors comprising an auxiliary device to increase the fuel feed for cold starting conditions and abutment means for controlling the idling throttle opening, said abutment means being capable of increasing this opening for running with cold engine, said auxiliary device and abutment means being operated automatically in accordance with the temperature of the engine.
  • abutment means consist of a thermostatic device comprising a material, contained in a closed housing, undergoing an important variation of volume when passing in a reversible fashion from one physical state to another one, and in particular from the solid state to the liquid state, between the temperatures to which said material is to be subjected according as the engine is cold or warm, respectively, such a device being capable of developing an effort greater than the force exerted by the resilient return means acting upon the throttle valve.
  • the carburetor is characterized by the fact that said thermostatic device acts not only upon the throttle valve but also upon the auxiliary starting device, this starting device consisting preferably of an unbalanced choke valve, i.e. a valve mounted on a shaft off-set from the center of induction pipe so that the air flow through this pipe will tend to open the valve against the resistance of resilient means.
  • this starting device consisting preferably of an unbalanced choke valve, i.e. a valve mounted on a shaft off-set from the center of induction pipe so that the air flow through this pipe will tend to open the valve against the resistance of resilient means.
  • FIG. 1 is a diagrammatic elevational view, with parts in section, of a carburetor made according to the present invention
  • FIG. 2 is a half-section view on the line IIII of FIG. 1;
  • FIG. 3 is a view similar to FIG. 1 showing the carburetor with its elements in the position corresponding to idling when the engine is warm;
  • FIG. 4 shows a modification of a detail of FIG. 1.
  • the carburetor comprises an induction pipe 1 having at the top thereof an air inlet 2 in which is provided a choke valve 3 mounted on a shaft 4, this shaft being off-set with respect to the center of the induction pipe so that the air flow through said induction pipe will tend to open said valve.
  • Downstream of said choke valve 3 are located, successively, in pipe 1, a venturi 5 and a cylindrical portion in which is mounted a throttle valve 6 carried by a spindle 7.
  • Throttle valve 6 is opened by the driver through a throttle control 8 which acts, in the direction of the arrow of FIG. 1, upon a lever 9 fixed on spindle 7, the throttle valve being constantly urged toward its closed position by a spring 10.
  • the primary mixture of air and fuel (not shown) opens into venturi 5.
  • the abutment means serving to determine the position of throttle valve 6 in idling position consist essentially of an oscillating lever 21 rotatable freely about spindle 7 and the lower part 21a of which cooperate with an element rigid with throttle valve 6.
  • this element consists of a screw 22 mounted in a lug 23 rigid with spindle 7.
  • Lug 23 may further carry, as shown, a second screw 34 which coopcrates with an abutment 35 rigid with the casing of the carburetor, this screw 34 serving chiefly to limit the minimum opening, corresponding to idling with the engine Warm, of throttle valve 6.
  • the angular position of lever 21 and consequently the minimum degree of opening of throttle valve 6 are determined by a thermostatic device comprising a material 24 contained in a closed casing 25 and capable of undergoing a substantial variation of volume when passing in reversible fashion from one physical state to another one and in particular from the solid or pasty state to the liquid state between the temperatures to which it is subjected according as the engine is cold or warm.
  • a push-piece 26 extends to the outside of casing 25.
  • This casing 25 is fixed in a chamber 14 by a screw 36 which applies said casing against an annular packing joint 37.
  • Casing 25 is subjected to the temperature of a fluid which becomes heated at the same time as engine is growing warm.
  • This fluid may consist, for instance, of the exhaust gases of the engine, of air heated by these gases, of the cooling water of the engine or of the lubricating oil of said engine.
  • chamber 14 is provided with an inlet conduit 30 and an outlet 31 for said fluid.
  • casing 25 might be subjected to the temperature of an electric resistor fed with current as soon as the engine is started.
  • Lever 21 is subjected, in the direction which corresponds to the closing of throttle valve 6, to the action of thermostatic device 2426 and, in the direction which corresponds to the opening of said throttle valve 6 to the action of a spring 28a bearing upon an abutment 38 rigid with the frame of the carburetor.
  • Spring 28a is chosen sufficiently strong to overcome the action of return spring 10.
  • choke valve 3 is urged in the closing direction by a return spring 39 secured to the upper end 21b of lever 21 so that the force exerted by this spring 39 upon choke valve 3 decreases when the temperature of material 24 increases and inversely.
  • spring 39 is secured to a lever 13 rigid with shaft 4. According to the modifica tion of FIG. 4, spring 39 is secured to a flexible strip or wire 40 which passes around a cam 41 rigid with shaft 4.
  • the carburetor such as above described works in the following manner.
  • push-piece 26 When the engine is cold (FIG. 1) push-piece 26 is wholly retracted with respect to its casing and spring 28a pushes lever 21 toward said push-piece so that the degree of opening of throttle valve 6 (determined by the cooperation of screw 22 with said lever) is relatively great.
  • push-piece 26 When the engine has warmed up (FIG. 3) push-piece 26 is driven outwardly and pushes lever 21 toward the left against the action of spring 28a so that the degree of opening of throttle valve 6 for idling running is reduced.
  • piston 17 is driven toward the left of FIG. 1 by the suction transmitted through pipe 16 and this displacement is limited by the communication opened between groove 20 and orifice 19.
  • the length of groove 20 is calculated so that the degree of opening of choke valve 3 in these conditions corresponds to the running of the engine when cold.
  • lever 21 pivots toward the left and, as above explained, gradually moves throttle valve 6 toward the idling running position suitable when the engine is warm. At the same time, the end 21b of lever 21 moves towards the left and thus reduces the pull exerted by spring 39 which enables choke valve 3 to open to a greater degree either under the effect of the air stream indicated by the arrow of FIG. 2 or through the action of piston 17 which has a tendency to move towards the left.
  • An internal combustion engine carburetor which comprises, in combination,
  • a throttle valve in said pipe downstream of said choke valve, said throttle valve being rotatable about an axis fixed with respect to said pipe,
  • a lever pivoted to said pipe about said axis and having a portion thereof arranged to form an abutment adapted to cooperate with said throttle valve projection for controlling the idling running position of said throttle valve
  • throttle valve return spring means for urging said throttle valve projection toward contact with said abutment
  • a mass of material enclosed in said casing capable of undergoing a great variation of volume when passing from one physical state to another in a reversible maner, in response to variation of its temperature from one given value to another one,
  • lever return spring means operable on said lever in the other direction for pivoting it about said axis in said other direction in response to reverse variations of the volume of said mass of material
  • lever return spring means being capable, upon such reverse variation of volume of said mass of material of moving said lever against the action of said throttle valve return spring means,
  • a carburetor according to claim 1 comprising a spindle rigid with said throttle valve and journalled with respect to said pipe about said axis, said lever being freely journalled about said spindle.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
US551068A 1961-04-15 1966-05-18 Carburetors comprising an automatic auxiliary starting device Expired - Lifetime US3291462A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR858876A FR79550E (fr) 1961-04-15 1961-04-15 Perfectionnements apportés aux carburateurs munis d'un dispositif auxiliaire de départ à commande automatique

Publications (1)

Publication Number Publication Date
US3291462A true US3291462A (en) 1966-12-13

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ID=8753145

Family Applications (1)

Application Number Title Priority Date Filing Date
US551068A Expired - Lifetime US3291462A (en) 1961-04-15 1966-05-18 Carburetors comprising an automatic auxiliary starting device

Country Status (5)

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US (1) US3291462A (de)
DE (1) DE1291939B (de)
ES (1) ES274422A1 (de)
FR (1) FR79550E (de)
GB (1) GB942234A (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575389A (en) * 1968-03-05 1971-04-20 Honda Motor Co Ltd Apparatus for automatic operation of a choke valve in a carburetor
US3740040A (en) * 1971-10-07 1973-06-19 Gen Motors Corp Carburetor with power choke
US3934571A (en) * 1972-04-10 1976-01-27 Societe Industrielle De Brevets Et D'etudes Carburettors for internal combustion engines, with an auxiliary starting device
US4003355A (en) * 1974-07-05 1977-01-18 Honda Giken Kogyo Kabushiki Kaisha Carburetor choke valve control device
US4008297A (en) * 1974-09-23 1977-02-15 Regie Nationale Des Usines Renault Automatic starting device of carburetor
US4053449A (en) * 1975-02-26 1977-10-11 Honda Giken Kogyo Kabushiki Kaisha Fast-idle cam apparatus in a carburetor
US4137284A (en) * 1977-08-18 1979-01-30 Barbee Boyd D Carburetor
US4159290A (en) * 1977-06-10 1979-06-26 Hitachi, Ltd. Variable stage type carburetor
US4181107A (en) * 1973-09-07 1980-01-01 Honda Giken Kogyo Kabushiki Kaisha Carburetor choke valve controlling device
US4186697A (en) * 1977-06-20 1980-02-05 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas purification promoting device
US4271802A (en) * 1978-03-20 1981-06-09 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Secondary intake gas control system for internal combustion engine
US4276240A (en) * 1979-12-21 1981-06-30 Ford Motor Company Carburetor
FR2475137A1 (fr) * 1980-02-06 1981-08-07 Weber Spa Perfectionnements a des dispositifs de starter pour carburateurs
US4630578A (en) * 1984-11-13 1986-12-23 Robert Bosch Gmbh Apparatus for controlling the position of a throttle device disposed in the intake tube of an internal combustion engine
US4788014A (en) * 1986-05-28 1988-11-29 Sanshin Kogyo Kabushiki Kaisha Auto-choke device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3864914D1 (de) * 1987-06-15 1991-10-24 Stihl Maschf Andreas Startautomatik fuer einen verbrennungsmotor, insbesondere fuer den von hand zu startenden motor eines arbeitsgeraetes.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1894354A (en) * 1931-05-07 1933-01-17 Carter Carburetor Corp Carburetor
US2124778A (en) * 1934-07-09 1938-07-26 Bendix Prod Corp Carburetor
US2774343A (en) * 1952-04-09 1956-12-18 Bendix Aviat Corp Choke control device
US2957465A (en) * 1958-05-23 1960-10-25 Gen Motors Corp Fast opening choke mechanism

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2094165A (en) * 1932-01-04 1937-09-28 Carter Carburetor Corp Internal combustion engine carburetor
GB420810A (en) * 1932-05-07 1934-11-27 Carter Carburetor Corp Improvements in carburettors
US2074728A (en) * 1932-12-22 1937-03-23 Bendix Aviat Corp Carburetor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1894354A (en) * 1931-05-07 1933-01-17 Carter Carburetor Corp Carburetor
US2124778A (en) * 1934-07-09 1938-07-26 Bendix Prod Corp Carburetor
US2774343A (en) * 1952-04-09 1956-12-18 Bendix Aviat Corp Choke control device
US2957465A (en) * 1958-05-23 1960-10-25 Gen Motors Corp Fast opening choke mechanism

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575389A (en) * 1968-03-05 1971-04-20 Honda Motor Co Ltd Apparatus for automatic operation of a choke valve in a carburetor
US3740040A (en) * 1971-10-07 1973-06-19 Gen Motors Corp Carburetor with power choke
US3934571A (en) * 1972-04-10 1976-01-27 Societe Industrielle De Brevets Et D'etudes Carburettors for internal combustion engines, with an auxiliary starting device
US4181107A (en) * 1973-09-07 1980-01-01 Honda Giken Kogyo Kabushiki Kaisha Carburetor choke valve controlling device
US4003355A (en) * 1974-07-05 1977-01-18 Honda Giken Kogyo Kabushiki Kaisha Carburetor choke valve control device
US4008297A (en) * 1974-09-23 1977-02-15 Regie Nationale Des Usines Renault Automatic starting device of carburetor
US4053449A (en) * 1975-02-26 1977-10-11 Honda Giken Kogyo Kabushiki Kaisha Fast-idle cam apparatus in a carburetor
US4159290A (en) * 1977-06-10 1979-06-26 Hitachi, Ltd. Variable stage type carburetor
US4186697A (en) * 1977-06-20 1980-02-05 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas purification promoting device
US4137284A (en) * 1977-08-18 1979-01-30 Barbee Boyd D Carburetor
US4271802A (en) * 1978-03-20 1981-06-09 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Secondary intake gas control system for internal combustion engine
US4276240A (en) * 1979-12-21 1981-06-30 Ford Motor Company Carburetor
FR2475137A1 (fr) * 1980-02-06 1981-08-07 Weber Spa Perfectionnements a des dispositifs de starter pour carburateurs
US4351782A (en) * 1980-02-06 1982-09-28 Weber S.P.A Cold-engine starting and operating devices for carburetors
US4630578A (en) * 1984-11-13 1986-12-23 Robert Bosch Gmbh Apparatus for controlling the position of a throttle device disposed in the intake tube of an internal combustion engine
US4788014A (en) * 1986-05-28 1988-11-29 Sanshin Kogyo Kabushiki Kaisha Auto-choke device

Also Published As

Publication number Publication date
DE1291939B (de) 1969-04-03
GB942234A (en) 1963-11-20
FR79550E (fr) 1962-12-14
ES274422A1 (es) 1962-06-16

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