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US3791358A - Carburetor control mechanism for an automotive gasoline powered internal combustion engine - Google Patents

Carburetor control mechanism for an automotive gasoline powered internal combustion engine Download PDF

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Publication number
US3791358A
US3791358A US00308561A US3791358DA US3791358A US 3791358 A US3791358 A US 3791358A US 00308561 A US00308561 A US 00308561A US 3791358D A US3791358D A US 3791358DA US 3791358 A US3791358 A US 3791358A
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United States
Prior art keywords
vacuum
engine
valve
intake manifold
diaphragm
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Expired - Lifetime
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US00308561A
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English (en)
Inventor
K Masaki
H Maruoka
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/08Carburettors 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
    • F02M1/10Carburettors 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

  • CARBURETOR CONTROL MECHANISM FOR AN AUTOMOTIVE GASOLINE POWERED INTERNAL COMBUSTION ENGINE Inventors: Kenji Masaki; Hiroyuki Maruoka,
  • ABSTRACT A carburetor control mechanism adapted for minimizing noxious and harmful components in exhaust gases of an automotive gasoline powered internal combustion engine.
  • the carburetor control mechanism comprises a first vacuum responsive actuator which is responsive to vacuum prevailing in an intake manifold of the engine to automatically open a carburetor throttle valve during the warming-up period of the engine after the engine is started, a solenoid valve for providing communication between the first vacuum responsive actuator and the intake manifold during the warmingup period of the engine an electric control device for controlling the solenoid valve and for retarding the ignition timing of the engine during the warming-up period, a second vacuum responsive actuator which is responsive to vacuum prevailing in the intake manifold to automatically open a choke valve, and a thermostat controlled device for controlling the level of vacuum acting on the second vacuum responsive actuator in accordance with the engine temperature.
  • This invention relates to an automotive internal combustion engine equipped with a carburetor and, more particularly, to a control mechanism for carburetor choke and throttle valves of such engine for minimizing the noxious and harmful components in the engineexhaust gases.
  • a known gasoline powered internal combustion engine used in a motor vehicle usually includes a carburetor which is adapted to provide an air-fuel mixture having a richer air-fuel ratio during the Warming-up or cold period of the engine by closing a carburetor choke valve to effect a satisfactory operation of the engine, since the extent of the fuel vaporization is small when the engine is cold. Consequently, a large amount of noxious and harmful components such as carbon monoxide and hydrocarbon gases are inevitably contained in the engine exhaust gases when the engine is running cold.
  • the carburetor is also adapted to open the choke valve as the engine temperature (as represented by the engine cooling liquid or exhaust gas temperature) increases during the warming-up period of the engine, whereby an air-fuel mixture having a proper air-fuel ratio is supplied to the engine thereby providing a satisfactory combustion of the air-fuel mixture in the'engine which remarkably reduces the noxious and harmful components such as carbon monoxide and hydrocarbon in the exhaust gases.
  • the choke valve it is desirable and effective to control the choke valve according to the engine temperature (typically represented by the engine cooling liquid temperature), since the vaporization of fuel mainly depends upon the engine temperature.
  • This invention-contemplates to provide a novel and improved control mechanism for the choke and throttle valves in an automotive gasoline powered internal combustion engine on the basis of the abovementioned facts.
  • an object of the present invention to provide an automatic control mechanism for minimizing the noxious and harmful components in the exhaust gases of an engine during the warming-up period.
  • the control mechanism comprises a first vacuum responsive actuatoror sensor sensing intake manifold depression for controlling the degree of opening of a carburetor throttle valve.
  • the first vacuum responsive actuator has a diaphragm member operatively connected to the carburetor throttle valve of the engine, a diaphragm chamber communicating selectively with an intake manifold of the engine and the atmosphere, and a compression spring disposed in the diaphragm chamber for urging the diaphragm member in one direction.
  • the diaphragm member responds to vacuum prevailing in the intake manifold moving in another direction against the force of the compression spring to open the throttle valve.
  • the control mechanism also comprises a solenoid valve for selectively introducing the vacuum prevailing in the intake manifold or atmospheric pressure into the diaphragm chamber.
  • the control'mechanism further comprises an electric control device for controlling the solenoid valve and adjusting the ignition timing of the engine thereby to introduce the vacuum prevailing in the intake manifold into the diaphragm chamber simultaneously retarding the ignition timing of the engine when the engine is running cold and idling, and to introduce atmospheric pressure to the diaphragm chamber simultaneously releasing the ignition timing retard when the engine has warmed up.
  • the control mechanism also includes a first set of two rotatableengaging members mounted on a throttle shaft. The first set of two rotatable engaging members each has projections which engage each other to open the throttle valve when vacuum prevailing in the intake manifold is introduced into the diaphragm chamber 'in the first vacuum responsive actuator.
  • One of the engaging members is operatively connected at its one end to the diaphragm member in the first vacuum responsive actuator and is rotatably mounted on the throttle shaft at its other end and is independent of the throttle shaft rotation.
  • the other of the engaging members is at its one end mounted fixedly on the throttle shaft and is adapted to turn the shaft, and is further connected at the other end to the accelerator pedal through a linkage.
  • the control mechanism also includes a second vacuum actuator or sensor sensing intake manifold depression for controlling the degree of opening of a carburetor choke valve.
  • the second vacuum responsive actuator includes a diaphragm member operatively connected to the choke valve, a diaphragm chamber communicating with the intake manifold, and a compression spring disposed in the diaphragm chamber for urging the diaphragm member in a direction to close the choke valve.
  • the diaphragm member responds to the vacuum in the intake manifold moving in another direction against the force of the compression spring to open the choke valve.
  • the control mechanism further comprises a thermostat or a temperature sensor controlled device associated with the second vacuum responsive actuator, for controlling the level of the vacuum acting on the diaphragm member on dependence on the temperature of the engine thereby to control the degree of opening of the choke valve, an actuating lever connected to the choke valve, and a link connected to the actuating lever.
  • the control mechanism also comprises a second set of two rotatable engaging members having projections which engage each other when the throttle valve is fully opened, one of the engaging members being connected to the linkage, and the other being connected to one of the first set of two engaging members connected to the accelerator pedal.
  • the projections of the second set of two engaging members engage each other for thereby causing the link and the actuating lever to hold the choke valve in its open position.
  • the FIGURE is a schematic view of a preferred embodiment of a control mechanism according to the present invention.
  • the internal combustion engine partly shown, which is generally represented by reference numeral 10, has, as customary, an air-fuel supply system comprising a carburetor 11 leading from an air cleaner 12, a choke valve 14 fixedly mounted on a rotatable choke shaft 15, and a throttle valve 16 fixedly mounted on a rotatable throttle shaft 17.
  • the internal combustion engine also includes an intake manifold 13 and an engine body 18 in which a water jacket 19 is formed.
  • An accelerator pedal 20 is provided for opening the throttle valve 16 via a linkage 21.
  • the control mechanism includes a first vacuum responsive actuator or sensing means 22 mounted on the carburetor 11.
  • the first vacuum responsive actuator or sensing means 22 is arranged to be actuated by or to sense vacuum or depression prevailing in the intake manifold 13 in a manner as will be hereinafter discussed in detail.
  • This first vacuum actuator or sensor 22 includes a housing 23 having formed therein a diaphragm chamber 24, which communicates with the intake manifold 13 through a conduit 25.
  • a diaphragm member such as a flexible diaphragm 26 is mounted in the housing 23 and carries a connecting rod 27.
  • a compression spring 28 is disposed in the diaphragm chamber 24 for urging the diaphragm member 26 in one direction.
  • the control mechanism also includes a first set of two engaging multi-arm levers 29 and 30 mounted on the throttle shaft 17.
  • the engaging multi-arm levers 29 and 30 have projections 29a and 30a, respectively, which selectively engage each other to open the throttle valve 16.
  • the engaging member 29 is rotatably mounted on the throttle shaft 17 and is independent of the throttle shaft rotation, and is further connected at its one end to the connecting rod'27 of the first vacuum responsive actuator 22.
  • the engaging member 30 is fixedly mounted on the throttle shaft 17 and is arranged to turn the shaft 17, and is also connected at its one end to the accelerator pedal 20 via the linkage 21.
  • a solenoid valve 31 for selectively introducing vacuum prevailing in the intake manifold 13 or atmospheric pressure into the diaphragm chamber 24.
  • An electric control device 32 is provided for controlling the solenoid valve 31 and for adjusting the ignition timing of the engine 10.
  • the electric control device 32 includes a switch 33 which is close when the engine is idling while cold, a thermoswitch of first temperature sensor 34 which is closed when the engine is cold, an ignition switch 35, and an ignition timing control device 36 for adjusting the ignition timing.
  • An actuating lever 37 is connected to the choke shaft 15 to actuate the choke valve 14.
  • the control mechanism also includes a second vacuum responsive actuator or sensing means 38 mounted on the carburetor body, which has a construction similar to the first vacuum responsive actuator 22.
  • the second vacuum responsive actuator or sensing means 38 is arranged to be actuated by or to sense the vacuum or depression prevailing in the intake manifold 13 in a manner as will be hereinafter discussed in detail.
  • This second vacuum responsive actuator 38 includes a housing 39 having formed therein a diaphragm chamber 40, which communicates with the intake manifold 13 through a conduit 41.
  • a diaphragm member such as a flexible diaphragm 42 is mounted in the housing 39 and carries a connecting rod 43 to which the actuating lever 37 is operatively connected so that the choke valve 14 is opened and closed by the movement of the diaphragm member 42.
  • a compression spring 44 is disposed in the diaphragm chamber 40 for urging the diaphragm member 42 in a direction to close the choke valve 1 6.
  • the diaphragm chamber 40 communicates with the intake manifold 13 of the engine through the conduit 14 so that the diaphragm member 42 disposed in the diaphragm chamber 40 is responsive to the vacuum prevailing in the intake manifold 13 to move in another direction to open the choke valve 14 against the force of the spring 44.
  • the control mechanism also includes a thermostat or temperature sensor controlled device 45.
  • the thermostat controlled device 45 is shown as interposed between the diaphragm chamber 40 of the second vacuum responsive actuator 33 and the intake manifold 13 but may be disposed in any suitable part of the engine.
  • the thermostat controlled device 45 includes a housing 46 having formed therein a vacuum level control chamber 47 communicating with the intake manifold 13 via a conduit 48 and with the diaphragm chamber 40 via conduit 41.
  • a partition wall member 49 is mounted in the housing 46 for defining the vacuum level control chamber 47. As shown, the partition wall member 49 is formed with a control aperture 50.
  • the housing 46 also has an air supply port 51 which opens to the atmosphere and which communicates with the vacuum control chamber 47 through the control aperture 50.
  • a valve member 52 is positioned opposite to the control aperture 50 for controlling the degree of communication between the air supply port 51 and the vacuum level control chamber 47 so that the level of the vacuum acting on the diaphragm member 42 is varied.
  • the thermostat controlled device 45 also includes a thermostat 53 which is fixed to the valve member 52, and associated therewith for controlling the movement thereof toward and away from the control aperture 50 in accordance with the engine temperature.
  • the thermostat 53 causes the valve member 52 to move towards the control aperture 50 to decrease the communication between the air supply port 51 and the vacuum level control chamber 47 for thereby increasing the level of vacuum acting on the diaphragm member 42 of the second vacuum responsive actuator 38.
  • the thermostat 53 is mounted in the water jacket 49 formed in the engine body 18. It is to be noted that the thermostat 53 is shown as disposed in the water jacket 19 in the embodiment ,of the FIGURE, but may be mounted in any suitable part of the engine.
  • the control mechanism also includes a second set of engaging multi-arm levers 54 and 55 which are rotatably mounted on a shaft 56 fastened to a suitable part of the engine body.
  • the engaging multi-arm levers 54 and 55 have formed thereon projections 54a and 55a, respectively, which selectively engage each other.
  • the engaging member 54 is connected at its one end to a link 57 connected to the actuating lever 37 while the engaging member 55 is connected at its one end to one end of a connecting member 58.
  • the connecting member 58 is operatively connected at the other end to the engaging member 30.
  • the FIGURE shows the control mechanism of the present invention when engine has not been started.
  • the choke valve 14 is substantially closed by the force of the compression spring 44.
  • the throttle valve 16 is also substantially closed since the accelerator pedal 20 is not depressed.
  • the switches 33, 34, 35 are all closed thereby to energize the coil of the solenoid valve 31.
  • the solenoid valve 31 introduces the vacuum prevailing in the intake manifold 13 into the diaphragm chamber 24 of the first vacuum responsive actuator or sensor 22.
  • the diaphragm member 26 is responsive to this vacuum to move in a direction to lower the connecting rod 27 against the force of the spring 28.
  • the connecting rod 27 is lowered, the engaging member 29 is rotated counterclockwise so that the projection 29a of the engaging member 29 is brought into engagement with the projection 30a of the engaging member 30 thereby to rotate" the engaging member 30 counterclockwise. Consequently, the throttle valve 16 connected to the engaging member 30 is opened to reach a proper position.
  • the ignition timing is retarded by the ignition timing control device 36.
  • the valve member 52 is away from the control aperture 50 to permit air to flow into the vacuum control chamber 47 since the engine is cold. Therefore, no significant vacuum develops-in the vacuum control chamber 47. Consequently, the choke valve 14 is kept closed.
  • the switches 33 and 34 open to deenergize the coil of the solenoid valve 31.
  • the solenoid valve 31 introduces atmospheric pressure into the diaphragm chamber 24 of the first vacuum resonsive actuator 22.
  • the diaphragm member 26 responds to the atmospheric pressure moving in a direction to allow lifting of the connecting rod 27 by the force of the spring 28.
  • the connecting rod 27 is lifted, theengaging member 29 is rotated clockwise so that the projection 29a disengages the projection 3tla. Simultaneously, the ignition timing retard is released. Depression of the accelerator 20 causes the motor vehicle to start to move and travel in a normal manner.
  • valve member 52 moves towards the control aperture 50 to restrict the atmospheric'flow therethrough. Consequently, the vacuum in the vacuum control chamber 47 is increased. Then, this vacuum is introduced into the diaphragm chamber 40, and the diaphragm member 42 moves-in a direction to open the choke valve. During the cruising of the motor vehicle, the choke valve is kept in a fully open position.
  • the control mechanism of the present invention provides the second set of two engaging members 54 and 55.
  • the engaging member 30 is caused to rotate counterclockwise thereby moving the connecting member 58 upwardly.
  • the engaging member 55 is rotated counterclockwise so that the projection 55a of the engaging member 55 is brought into engagement with the projection 54a of the engaging member 54 thereby rotating theengaging member 54 counterclockwise. Consequently, the link 57 is moved leftwardly to rotate the actuating lever 37 clockwise and, thus, the actuating lever 37 holds the choke valve 14 in its open position, against the force of the spring 44.
  • the engaging member 34 As the throttle valve 16 is closed by releasing the accelerator pedal 20, the engaging member 34) is held in a position to cause the projections 54a and 55a to-disengage so that the choke valve 14 is controlled by the second vacuum actuator 38.
  • the lengths of the projections 54a and 55d are selected so that the accelerator pedal can be operated smoothly.
  • control mechanism of the present invention has the advantages of not only automatically controlling the choke and throttle valves of the engine carburetor but also effecting faster warming-up of the engine thereby to minimize the total amount of noxious and harmful components emitted with the engine exhaust gases, but also has the advantages of being highly reliable in operation, low in manufacturing cost and can readily be installed in known types of engines without requiring any significant change or modification.
  • a first vacuum responsive actuator for controlling the degree of opening of said throttle valve
  • said vacuum responsive actuator including a diaphragm member operatively connected to said throttle valve, a diaphragm chamber communicating selectively with said intake manifold and the atmosphere, and a spring disposed in said diaphragm chamber for urging said diaphragm member in one direction, said diaphragm member being responsive to vacuum prevailing in said intake manifold to move in another direction against the force of said spring to open said throttle valve
  • a solenoid valve for selectively introducing vacuum prevailing in said intake manifold and atmospheric air into said diaphragm chamber, and an electric control device for controlling said solenoid valve and adjusting the ignition timing of the engine thereby to introduce the vacuum prevailing in said intake manifold into said diaphragm chamber simultaneously retarding the
  • said electric control device includes an idling switch adapted to close when the engine is idling while cold, a thermoswitch adapted to close when the engine temperature is below a certain value, and an ignition timing control device for adjusting the ingition timing of the engine.
  • said thermostat controlled device includes 'a vacuum level control chamber located between said diaphragm chamber of said second vacuum responsive actuator and said intake manifold and having an inlet communicating with said intake manifold and an outlet communicating with said diaphragm chamber of said second vacuum responsive actuator, a partition wall member for defining said vacuum level control chamber and having formed therein a control aperture which opens to said vacuum level control chamber, an air supply passageway communicating with said control aperture, a valve member provided for controlling the degree of communication between said air supply port and said vacuum level control chamber in dependence on engine temperature thereby to control the level of said vacuum acting on said diaphragm member of said second vacuum responsive actuator, and a thermostat fixed to said valve member for controlling the movement thereof toward and away from said control aperture formed in said partition wall member, said thermostat being responsive to the temperature of said engine, whereby when said engine temperature exceeds a predetermined level, said thermostat causes said valve member to move toward said control aperture to decrease the communication between said air supply passageway and said vacuum level control chamber for thereby increasing the level
  • thermostat is mounted in a water jacket formed in a body of said internal combustion engine, said thermostat being subject to an engine cooling liquid in said water jacket, whereby the movement of said valve member is controlled by said thermostat in response to the temperature of said cooling liquid.

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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 Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
US00308561A 1971-12-08 1972-11-21 Carburetor control mechanism for an automotive gasoline powered internal combustion engine Expired - Lifetime US3791358A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46099152A JPS5110306B2 (de) 1971-12-08 1971-12-08

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US3791358A true US3791358A (en) 1974-02-12

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US00308561A Expired - Lifetime US3791358A (en) 1971-12-08 1972-11-21 Carburetor control mechanism for an automotive gasoline powered internal combustion engine

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US (1) US3791358A (de)
JP (1) JPS5110306B2 (de)
AU (1) AU446708B2 (de)
CA (1) CA959725A (de)
DE (1) DE2259529C3 (de)
FR (1) FR2164368A5 (de)
GB (1) GB1386648A (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905345A (en) * 1973-02-12 1975-09-16 Toyota Motor Co Ltd Choke assembly for internal combustion engines
US3907944A (en) * 1973-07-06 1975-09-23 Toyota Motor Co Ltd Choke control system for internal combustion engines
US3956433A (en) * 1973-07-30 1976-05-11 Alfa Romeo S.P.A. Automatic device for equalizing the adjustment of the carburetter to the operation of an engine not yet running at a steady temperature
US4005693A (en) * 1973-01-29 1977-02-01 Nissan Motor Co., Ltd. Warming-up system for internal combustion engines
US4053542A (en) * 1976-07-22 1977-10-11 Acf Industries, Inc. Control means for secondary throttle
DE2733672A1 (de) * 1976-08-04 1978-02-09 Alfa Romeo Spa Vorrichtung zum regeln der kraftstoff-luft-gemischzufuhr bei einem verbrennungsmotor
US4079715A (en) * 1973-01-29 1978-03-21 Nissan Motor Company, Ltd. Warming-up system for internal combustion engines
US4094931A (en) * 1975-11-28 1978-06-13 Hitachi, Ltd. Carburetor assembly
US4096843A (en) * 1973-06-18 1978-06-27 Ethyl Corporation Starting system
US4202302A (en) * 1978-07-28 1980-05-13 Toyota Jidosha Kogyo Kabushiki Kaisha Automatic choke arrangement
US7628387B1 (en) 2008-07-03 2009-12-08 Briggs And Stratton Corporation Engine air/fuel mixing apparatus
US9464588B2 (en) 2013-08-15 2016-10-11 Kohler Co. Systems and methods for electronically controlling fuel-to-air ratio for an internal combustion engine
US10054081B2 (en) 2014-10-17 2018-08-21 Kohler Co. Automatic starting system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5225933A (en) * 1975-08-25 1977-02-26 Honda Motor Co Ltd Choke valve controller of internal cobustion engine
DE2825648A1 (de) * 1978-06-12 1979-12-13 Jagenberg Werke Ag Senk- und schwenkschienenanordnung fuer eine faltschachtelpackmaschine
DE3028425C2 (de) * 1980-07-26 1982-08-12 Pierburg Gmbh & Co Kg, 4040 Neuss Vergaser für Brennkraftmaschinen
US5069180A (en) * 1990-10-19 1991-12-03 Onan Corporation Automatic choke apparatus and method
CN105240108A (zh) * 2015-06-29 2016-01-13 丁巧娜 发动机除冰控制器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979047A (en) * 1957-07-08 1961-04-11 Acf Ind Inc Automatic choke for small carburetors
US3529586A (en) * 1968-04-03 1970-09-22 Ethyl Corp Carburetor
US3547089A (en) * 1967-04-06 1970-12-15 Ind De Brenets Et D Etudes S I Carburation device for internal combustion engines for automobile vehicles
US3556064A (en) * 1968-04-04 1971-01-19 Honda Motor Co Ltd Air pollution preventive device for spark-ignition-type internal combustion engines
US3721222A (en) * 1970-09-17 1973-03-20 Honda Motor Co Ltd Control apparatus for the idle position of a throttle valve for an internal combustion engine
US3742785A (en) * 1971-08-11 1973-07-03 Gen Motors Corp Ignition timing and throttle position control

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979047A (en) * 1957-07-08 1961-04-11 Acf Ind Inc Automatic choke for small carburetors
US3547089A (en) * 1967-04-06 1970-12-15 Ind De Brenets Et D Etudes S I Carburation device for internal combustion engines for automobile vehicles
US3529586A (en) * 1968-04-03 1970-09-22 Ethyl Corp Carburetor
US3556064A (en) * 1968-04-04 1971-01-19 Honda Motor Co Ltd Air pollution preventive device for spark-ignition-type internal combustion engines
US3721222A (en) * 1970-09-17 1973-03-20 Honda Motor Co Ltd Control apparatus for the idle position of a throttle valve for an internal combustion engine
US3742785A (en) * 1971-08-11 1973-07-03 Gen Motors Corp Ignition timing and throttle position control

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005693A (en) * 1973-01-29 1977-02-01 Nissan Motor Co., Ltd. Warming-up system for internal combustion engines
US4079715A (en) * 1973-01-29 1978-03-21 Nissan Motor Company, Ltd. Warming-up system for internal combustion engines
US3905345A (en) * 1973-02-12 1975-09-16 Toyota Motor Co Ltd Choke assembly for internal combustion engines
US4096843A (en) * 1973-06-18 1978-06-27 Ethyl Corporation Starting system
US3907944A (en) * 1973-07-06 1975-09-23 Toyota Motor Co Ltd Choke control system for internal combustion engines
US3956433A (en) * 1973-07-30 1976-05-11 Alfa Romeo S.P.A. Automatic device for equalizing the adjustment of the carburetter to the operation of an engine not yet running at a steady temperature
US4094931A (en) * 1975-11-28 1978-06-13 Hitachi, Ltd. Carburetor assembly
US4053542A (en) * 1976-07-22 1977-10-11 Acf Industries, Inc. Control means for secondary throttle
DE2733672A1 (de) * 1976-08-04 1978-02-09 Alfa Romeo Spa Vorrichtung zum regeln der kraftstoff-luft-gemischzufuhr bei einem verbrennungsmotor
US4104337A (en) * 1976-08-04 1978-08-01 Alfa Romeo S.P.A. Mixture feed regulation device for an internal-combustion engine
US4202302A (en) * 1978-07-28 1980-05-13 Toyota Jidosha Kogyo Kabushiki Kaisha Automatic choke arrangement
US7628387B1 (en) 2008-07-03 2009-12-08 Briggs And Stratton Corporation Engine air/fuel mixing apparatus
US9464588B2 (en) 2013-08-15 2016-10-11 Kohler Co. Systems and methods for electronically controlling fuel-to-air ratio for an internal combustion engine
US10240543B2 (en) 2013-08-15 2019-03-26 Kohler Co. Integrated ignition and electronic auto-choke module for an internal combustion engine
US10794313B2 (en) 2013-08-15 2020-10-06 Kohler Co. Integrated ignition and electronic auto-choke module for an internal combustion engine
US10054081B2 (en) 2014-10-17 2018-08-21 Kohler Co. Automatic starting system

Also Published As

Publication number Publication date
GB1386648A (en) 1975-03-12
DE2259529B2 (de) 1979-09-20
FR2164368A5 (de) 1973-07-27
DE2259529C3 (de) 1980-05-29
JPS4864335A (de) 1973-09-06
CA959725A (en) 1974-12-24
AU446708B2 (en) 1974-03-28
DE2259529A1 (de) 1973-06-14
JPS5110306B2 (de) 1976-04-02
AU4920172A (en) 1974-03-28

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