US3852391A - Carburetor with deceleration circuit - Google Patents

Carburetor with deceleration circuit Download PDF

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Publication number
US3852391A
US3852391A US00233602A US23360272A US3852391A US 3852391 A US3852391 A US 3852391A US 00233602 A US00233602 A US 00233602A US 23360272 A US23360272 A US 23360272A US 3852391 A US3852391 A US 3852391A
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United States
Prior art keywords
carburetor
passage
induction passage
engine
vacuum
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Expired - Lifetime
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US00233602A
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English (en)
Inventor
T Hisatomi
K Sasaki
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.)
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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Publication of US3852391A publication Critical patent/US3852391A/en
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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
    • F02M3/00—Idling devices for carburettors
    • F02M3/08—Other details of idling devices
    • F02M3/09—Valves responsive to engine conditions, e.g. manifold vacuum
    • 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
    • Y10S261/19—Degassers
    • 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
    • Y10S261/21—Drawing excess fuel from carbureting passage

Definitions

  • This invention relates in general to a carburetor for an internal combustion engine of a motor vehicle and more particularly to a carburetor adapted to reduce the unburned content of exhaust gases emitted from the engine during deceleration.
  • An additional mixture circuit called the idling and slowrunning mixture circuit, is therefore provided to supply an air-fuel mixture to the engine during deceleration in an amount and mixture ratio that are predetermined.
  • the amount and mixture ratio of the air-fuel mixture are usually predetermined to suit the idling operation of the engine.
  • the engine is thus supplied during idling and deceleration with an air-fuel mixture which is predetermined to enablethe engine to operate satisfactorily during the idling, not the decelerating operation. This is reflected by reduced combustion efficiency and misfiring in the combustion chambers of the engine during deceleration so that unburned exhaust gases are emitted from the engine to the atmosphere causing serious air pollution especially in urban areas.
  • the present invention contemplates to provide a carburetor which is constructed and arranged in such a manner that an air-fuel mixture of optimum amount and mixture ratio is fed during deceleration to the engine through a mixture circuit which is independent of the idling and slow-running mixture circuit.
  • the independent mixture circuit is herein referred to as deceleration circuit" because it is operable during deceleration.
  • Anotherobject of the present invention is to provide an improved carburetor for an internal combustion engine of a motor vehicle which carburetor is simple in construction and economical to manufacture.
  • a further object of the present invention is to provide an improved carburetor for an internalcombustion engine ofa motor vehiclewhich carburetor has a deceleration circuit adapted to supply the engine with an airfuel mixture of optimum amount and mixture ratio during deceleration to effect complete combustion of the air-fuel mixture supplied to the engine for thereby eliminating unburned hydrocarbon and carbon monoxide contents in engine exhaust gases emitted to the atmosphere.
  • the deceleration circuit includes a by-pass passage having an inlet port communicating with a'carburetor induction passage upstream of the venturi and an outlet port communicating with the carburetor induction passage downstream of the throttle valve.
  • An air jet is provided in the by-pass passage to control the flow rate of air passing therethrough.
  • a fuel jet is also provided in the by-pass passage downstream of the air jet, the fuel jet leading from a fuel supply by-pass passage communicating with a float chamber.
  • a control unit is incorporated in the carburetor.
  • the con- .trol unit includes a housing having first and second cavities which act as first and second vacuum chambers, respectively.
  • the housing also has a spring seat which intervenes between the first and second cavities and which is formedwitha central aperture therein.
  • a cap member is attached to one endof the housing, a first diaphragm member being interposed between the cap member and the one end of the housing.
  • the cap member has formed with a central opening vented to the atmosphere for a first atmospheric chamber defined between the inner surface of the cap member and the first diaphragm member.
  • a control valve element is connected to the first diaphragm member and extends through the central aperture formed in the spring seat to open or close the same.
  • a passage is provided which has one end communicating with the first vacuum chamber and the other end communicating with the carburetor induction passage downstream of the throttle valve.
  • the first diaphragm member is biased by a first coiled compression spring in a'direction to cause the control valveelement to open the central aperture for providing communication between the first and second vacuum chambers.
  • the first coiled compression spring engages at one end thereof with the disc assembly attached to the first diaphragm member and at the other end thereof with the spring seat.
  • the control unit further includes a second diaphragm member which is interposed between the other end of the housing and the carburetor body.
  • the carburetor body is formed with a cavity which constitutes a second atmospheric chamber in association with the second diaphragm member.
  • the second atmospheric chamber communicates with the carburetor induction passage upstream of the venturi.
  • An adjusting valve element is connected to and movable with the second diaphragm member, the adjusting valve element extending through an opening formed in said carburetor body into the by-pass passage to open or close the same.
  • a second compression spring is disposed in the second vacuum chamber for biasing the second diaphragm member in a direction to cause the adjusting valve element to close the by-pass passage.
  • the pressure difference on opposite sides of the first diaphragm member will be sufficient to overcome the biasing force of the first compression spring and the first diaphragm member will move in a directionto cause the control valve element to open the central aperture.
  • the second diaphragm member in the second vacuum chamber will besubjected to the'intake manifold vacuum, and the pressure difference on opposite sides of the second diaphragm member-will effect movement of the second diaphragm member in a direction to cause the adjusting valve to open the by-pass passage.
  • FIG. 1 is a sectional view of a preferred embodiment of a carburetor according to the present invention
  • FIG. 2 is a view illustrating a typical example of variations of the intake manifold vacuumobtained with the use of the carburetor shown in FIG. 1;
  • FIG. 3 is a view illustrating the relationship between intake manifold vacuum and the stroke .of the valve element forming part of the control unit of the carburetor shown in FIG. 1.
  • the carburetor which is generally designated by reference numeral 10, includes a carburetor body 100 which is provided with a carburetor induction passage 12 leading from an air cleaner (not shown) to an intake manifold (not shown) of the engine, a throttle valve 14 disposed in the carburetor induction passage 12, a venturi l6"formed in the carburetor induction passage 12 upstream of the throttle valve 14, a main mixture circuit 18 having a main mixture nozzle 20 opening into the venturi 16, an idling and slow-running mixture circuit 22 having a slow-running port 24 located at a position closely adjacent to the periphery of the throttle valve 14 when it is substantially fully closed and an idling port 26 located downstream of the throttle valve 14, and a float chamber 28 for containing therein liquid fuel 30.
  • the throttle valve 14 is mounted on an angularly adjustable shaft Ma in the carburetor induction passage 32 and is herein shown as substantially fully closed to effect idling or deceleration of the engine.
  • the idling and slow-running mixture circuit 22 for idling or light load operation communicates with j the float chamber 28 through, in addition to the first orifice 32, asecond orifice 34 and opens to the carburetor induction passage through the slow-running port 24'and the idling port 26.
  • the deceleration mixture circuit which is generally indicated at 36, includes a by-pass passage 38 having an inlet port 38a communicating with the carburetor induction passage 12 upstream of the venturi 16 and an outlet port 38b communicating with the carburetor induction passage 12 downstream of the throttle valve 14.
  • the by-pass passage 38 is provided adjacent its upstream end with an air jet 40 to control the flow rate of air passing therethrough and a fuel jet 42 provided in a fuel supply by-passage 44 opening to the by-pass passage 38 downstream of the air jet- 40.
  • the by-pass passage 44 leads from the float chamber 28 through a port 440.
  • the effectiveareas of the air jet 40 and the fuel jet 42 are so calibrated as to provide an air-fuel mixture of proper mixture ratio that is specifically suited for maintaining the engine at decelerating conditions to minimize the air pollutant content in the engine exhaust gases.
  • control unit 46 which is responsive to the vacuum prevailing in the carburetor induction passage 12 downstreamof the throttle valve 14.
  • the control unit 46 includes a housing 48 having first and second cavities 50 and 52 which act as first and second vacuum chambers, respectively, in a manner as will be hereinafter described in detail.
  • the housing 48 also has a spring seat 54 which intervenes between the first and second cavities 50 and 52, the spring seat 54 being formed with a central aperture 56 which interconnects the second vacuum chamber 52 with the first vacuum chamber 50.
  • the right hand end of the housing 48 is closed by a cap member 58, a suitable first diaphragm member 60 being interposed between the cap member 58 and the right hand end of the housing 48.
  • the cap member 58 is attached to the housing 48 by a suitablefastener means, though not shown.
  • the cap member 58 is formed with a central opening 62 which constitutes an atmospheric vent for the first atmospheric chamber 64 formed between the right hand surface of the first diaphragm member and the inner surface of the cap member 58.
  • a control valve element 66 is operatively disposed in the central aperture 56.
  • the control valve element 66 has one end formed with a frusto-conical valve head 66a and the other end connected to the first diaphragm member 60 by means of a disc assembly 68.
  • a coiled compression spring 70 is provided between the spring seat 54 and the first diaphragm member 60 for biasing the first diaphragm member 66 rightwardly as viewed in FIG. I, that is, in a direction to cause the valve head 66a of the control valve element 66 to seat on the valve seat 540 formed on the spring seat 54 for thereby interrupting communication between the first and second chambers 50 and 52.
  • One end of the coil spring 70 engages with the right hand side of the spring seat 56 while the other end thereof engages with a left hand side disc of the disc assembly 68.
  • the first cavity or the vacuum chamber 56' has a port Stla communicating with the carburetor induction passage 12 downstream of the throttle valve 14 through a passage 72.
  • the vacuum chamber 56 is subjected to a vacuum of a predetermined magnitude through the port 50a, the pressure difference acting on opposite sides of the diaphragm member 66 will be sufficient to overcome the resisting force of the calibrated coiled compression spring 70 and, hence, the diaphragm member 60 will move leftwardly of the drawing, as viewed in FIG. I, to a position where the valve head 66a of the control valve element 66 is unseated from the valve seat 54a to interconnect the first vacuum chamber 56 with the second vacuum chamber 52.
  • the left hand end of the housing 48 is attached to and maintained in assembled relation with the carburetor bodyat lltla by a suitable fastener means, not shown. Between these parts, a second diaphragm member 74 is interposed which has attached thereto a disc assembly 76, to which an adjusting valve element 78 is secured.
  • the adjusting valve element 78 extends through an opening 66 formed in the carburetor body We into the by-pass passage 38 to open and close the same.
  • the opening 86 is so sized as to permit smooth movement of the adjusting valve element 76 therethrough.
  • a second coiled compression spring 82 is disposed between the spring seat 54 and the second diaphragm member 7 1 for biasing the second diaphragm member Ml leftwardly, as viewed in FIG. I, to a position where the adjusting valve element 76 closes the by-pass passage 38.
  • One end of the coiled compression spring 62 engages with the left hand side of the spring seat 54 while the other end of the coiled compression spring fil engages with the right hand side disc of thedisc assembly 76.
  • the second vacuum chamber 52 is formed with a port 52a which interconnects the vacuum chamber 52 with the atmosphere or the carburetor induction passage llZ upstream ofthe venturi 16 through a calibrated air bleed M.
  • the calibrated air bleed M- for the chamber 52 prevents the trapping of vacuum in chamber 52 when the control valve element 66 closes the central aperture 56 so that the second diaphragm member 74 will respond quickly and in a follow-up manner to the movements of the first diaphragm member 66.
  • the vacuum chamber 52 is bled to the atmo sphere or the carburetor induction passage through the air bleed 8d sothat unless the control valve element 66 closes the central aperture 56, the coiled compression spring 62 is operative to 'move the diaphragm member 74 leftwardly, as viewed in FIG. l, and thereby position the adjusting valve element 76m close the by-pass passage 36.
  • the carburetor body lltla is formed with a cavity which defines a second atmospheric chamber 86 in association with the second diaphragm member 74.
  • This chamber 66 communicates with the carburetor induction passage 12 upstream of the venturi 16 through a passage 88 so that a pressure difference developes across the second diaphragm member 74.
  • the passage 86 is shown as opening to the carburetor induction passage 12 but may be constituted to open to the atmosphere.
  • Indicated at 96 is an orifice which interconnects the second atmospheric chamber with the passage 72 communicating with the carburetor induction passage l2 downstream of the throttle valve 114. The orifice permits the air-fuel mixture drawn to the chamber 86 through the gap formed between the opening 86 and the adjusting valve element 78 to flow into the passage 72 through which the air-fuel mixture is supplied to the engine thereby eliminating waste of the fuel.
  • the resisting spring load on the first diaphragm member 60 is adjusted so that this diaphragm member is not actuated until the intake manifold vacuum exceeds a value which is created during normal running operation, for instance, 550 mm of Hg.
  • a value which is created during normal running operation for instance, 550 mm of Hg.
  • the first diaphragm member 60 will move leftwardly of the drawing due to the pressure difference on opposite sides thereof and the control valve element 66 will open the central aperture 56.
  • the valve head 66a of the control valve element 66 is unseated from the valve seat 540, the intake manifold vacuum prevailing in the first vacuum chamber Stl is communicated to the second vacuum chamber 52.
  • the fuel admitted to the passage 36 is mixed with air flowing therethrough to form an air-fuel mixture which is supplied directly to the intake manifold of the engine through the carburetor induction passage 112.
  • the air-fuel mixture supplied by the deceleration circuit 36 mixes with the idling air-fuel mixture supplied by the carburetor idling and slow running mixture circuit 22 and forms a combustible mixture which is distributed by the intake manifold to the several engine cylinders and purges the exhaust gases therefrom. In this manner, the unburned content in the engine exhaust gases during deceleration is eliminated.
  • the control unit 46 associated with the deceleration circuit 36 operates intermittently during deceleration with a substantially fully closed throttle valve, since as soon as the intake manifold vacuum decreases below a predetermined value, the first diaphragm member 60 will move rightwardly of the drawing by the force of the coiled compression spring '70 to cause the valve head 66a of the control valve element 66 to be seated on the valve seat 54a to interrupt communication between the first and second vacuum chambers 50 and 52.
  • the second vacuum chamber 52 reaches an the variations in the intake manifold vacuum of the'engine equipped with a conventional carburetor whereas curve B indicates the variations in the intake manifold vacuum of the engine equipped with the carburetor according to the present invention.
  • FIG. 3 illustrates the relationship between the intake manifold vacuum and the stroke of the adjusting valve element 78 of the control unit 46 shown in FIG. 1.
  • a solid line C shows the rate of variation of the intake manifold vacuum of the engine equipped with a carburetor having a conventional control unit.
  • a dotted line D indicates the rate of variation of the intake manifold vacuum of the engine equipped with a carburetor having incorporated therein the control unit forming part of the invention.
  • the carburetor implementing the present invention is capable of supplying the engine with an airfuel mixture of optimum amount and mixture ratio that are specifically suited for deceleration of the engine to eliminate the unburned contents in the engine exhaust gases emitted to the atmosphere.
  • carburetor of the present invention is simple in construction and economical to manufacture.
  • a carburetor for an internal combustion engine comprising a carburetor body, a carburetor induction passage formed in said carburetor body, a venturi in said carburetor induction passage, a throttle valve operatively disposed in said carburetor induction passage, a main mixture circuit opening into said venturi in said carburetor induction passage for supplying an air-fuel mixture to said carburetor induction passage for highspeed and acceleration operations of said engine, an idling and slow-running mixture circuit opening into said carburetor induction passage downstream of said throttle valve for supplying an air-fuel mixture to said carburetor induction passage for low-speed and deceleration operations of said engine, a float chamber which supplies fuel to said two circuits, a by-pass passage having an inlet port communicating with said carburetor induction passage upstream of said venturi and an outlet port communicating with said carburetor induction passage downstream of said throttle valve, an air jet provided in said bypass passage to control the flow rate of air passing therethrough

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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)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
US00233602A 1971-03-11 1972-03-10 Carburetor with deceleration circuit Expired - Lifetime US3852391A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46013272A JPS502775B1 (de) 1971-03-11 1971-03-11

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US3852391A true US3852391A (en) 1974-12-03

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US00233602A Expired - Lifetime US3852391A (en) 1971-03-11 1972-03-10 Carburetor with deceleration circuit

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US (1) US3852391A (de)
JP (1) JPS502775B1 (de)
DE (1) DE2211698C3 (de)
FR (1) FR2129546A5 (de)
GB (1) GB1379952A (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3933950A (en) * 1974-05-02 1976-01-20 General Motors Corporation Air valve carburetor
US4003358A (en) * 1974-08-27 1977-01-18 Toyo Kogyo Co., Ltd. Control system for controlling an air-fuel mixture in internal combustion engine
US4008696A (en) * 1974-03-19 1977-02-22 Nissan Motor Co., Ltd. Carburetor for optimum control of an air-fuel mixture supply to the engine during deceleration
US4122806A (en) * 1976-03-26 1978-10-31 Deutsche Vergaser Gmbh & Co. Kg Valve for adding extra air in an internal combustion engine
US4192140A (en) * 1974-07-16 1980-03-11 Yamaha Hatsudoki Kabushiki Kaisha Apparatus and method relating to internal combustion engines utilizing an exhaust gas reactor
US4196709A (en) * 1977-01-06 1980-04-08 Nissan Motor Company, Limited After burning preventive system for an internal combustion engine
US4220123A (en) * 1976-06-04 1980-09-02 Robert Bosch Gmbh Subpressure limiter for a fuel injection system
US4328774A (en) * 1978-10-31 1982-05-11 Hitachi, Ltd. Device for controlling negative pressure in suction pipe of internal combustion engine
US4355606A (en) * 1978-10-02 1982-10-26 The Bendix Corporation Idle speed control valve
US4494505A (en) * 1982-01-07 1985-01-22 Nissan Motor Company, Limited Deceleration control device for an internal combustion engine
US5073307A (en) * 1989-02-03 1991-12-17 Andreas Stihl Membrane carburetor for an internal combustion engine of a handheld portable tool
US5434203A (en) * 1989-08-18 1995-07-18 Bayer Aktiengesellschaft Mixtures of bisphenols and graft polymers
US6299144B1 (en) * 2000-03-07 2001-10-09 Marc W. Salvisberg Carburetor device with additional air-fuel flow apertures
US6478288B1 (en) 2001-05-24 2002-11-12 Bret A. Duncan High performance carburetor
US20070013085A1 (en) * 2005-07-13 2007-01-18 Satoru Araki Diaphragm-type carburetors

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5665868U (de) * 1979-10-26 1981-06-02

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1265194A (en) * 1914-06-11 1918-05-07 Stromberg Motor Devices Co Carbureter.
US2824726A (en) * 1955-11-08 1958-02-25 Gen Motors Corp Degasser attachment for internal combustion engines
US3503594A (en) * 1967-08-28 1970-03-31 Toyota Motor Co Ltd Fuel system
DE1916639A1 (de) * 1969-04-01 1970-10-15 Volkswagenwerk Ag Gemisch-Regelsystem fuer eine Vergaser-Brennkraftmaschine
US3575386A (en) * 1969-04-25 1971-04-20 Ford Motor Co Device for reducing internal combustion engine hydrocarbon emissions
US3677526A (en) * 1969-03-03 1972-07-18 Sibe Carburetion devices for internal combustion engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2006731A1 (de) * 1968-04-23 1970-01-02 Toyota Motor Co Ltd

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1265194A (en) * 1914-06-11 1918-05-07 Stromberg Motor Devices Co Carbureter.
US2824726A (en) * 1955-11-08 1958-02-25 Gen Motors Corp Degasser attachment for internal combustion engines
US3503594A (en) * 1967-08-28 1970-03-31 Toyota Motor Co Ltd Fuel system
US3677526A (en) * 1969-03-03 1972-07-18 Sibe Carburetion devices for internal combustion engine
DE1916639A1 (de) * 1969-04-01 1970-10-15 Volkswagenwerk Ag Gemisch-Regelsystem fuer eine Vergaser-Brennkraftmaschine
US3575386A (en) * 1969-04-25 1971-04-20 Ford Motor Co Device for reducing internal combustion engine hydrocarbon emissions

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008696A (en) * 1974-03-19 1977-02-22 Nissan Motor Co., Ltd. Carburetor for optimum control of an air-fuel mixture supply to the engine during deceleration
US3933950A (en) * 1974-05-02 1976-01-20 General Motors Corporation Air valve carburetor
US4192140A (en) * 1974-07-16 1980-03-11 Yamaha Hatsudoki Kabushiki Kaisha Apparatus and method relating to internal combustion engines utilizing an exhaust gas reactor
US4003358A (en) * 1974-08-27 1977-01-18 Toyo Kogyo Co., Ltd. Control system for controlling an air-fuel mixture in internal combustion engine
US4122806A (en) * 1976-03-26 1978-10-31 Deutsche Vergaser Gmbh & Co. Kg Valve for adding extra air in an internal combustion engine
US4220123A (en) * 1976-06-04 1980-09-02 Robert Bosch Gmbh Subpressure limiter for a fuel injection system
US4196709A (en) * 1977-01-06 1980-04-08 Nissan Motor Company, Limited After burning preventive system for an internal combustion engine
US4355606A (en) * 1978-10-02 1982-10-26 The Bendix Corporation Idle speed control valve
US4328774A (en) * 1978-10-31 1982-05-11 Hitachi, Ltd. Device for controlling negative pressure in suction pipe of internal combustion engine
US4494505A (en) * 1982-01-07 1985-01-22 Nissan Motor Company, Limited Deceleration control device for an internal combustion engine
US5073307A (en) * 1989-02-03 1991-12-17 Andreas Stihl Membrane carburetor for an internal combustion engine of a handheld portable tool
US5434203A (en) * 1989-08-18 1995-07-18 Bayer Aktiengesellschaft Mixtures of bisphenols and graft polymers
US6299144B1 (en) * 2000-03-07 2001-10-09 Marc W. Salvisberg Carburetor device with additional air-fuel flow apertures
US6478288B1 (en) 2001-05-24 2002-11-12 Bret A. Duncan High performance carburetor
US20070013085A1 (en) * 2005-07-13 2007-01-18 Satoru Araki Diaphragm-type carburetors
US7309061B2 (en) * 2005-07-13 2007-12-18 Zama Japan Co., Ltd. Diaphragm-type carburetors

Also Published As

Publication number Publication date
JPS502775B1 (de) 1975-01-29
FR2129546A5 (de) 1972-10-27
DE2211698B2 (de) 1979-05-23
GB1379952A (en) 1975-01-08
DE2211698C3 (de) 1980-01-10
DE2211698A1 (de) 1972-10-26

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