US3794302A - Floatless carburetor for internal combustion engines - Google Patents

Floatless carburetor for internal combustion engines Download PDF

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Publication number
US3794302A
US3794302A US00312263A US3794302DA US3794302A US 3794302 A US3794302 A US 3794302A US 00312263 A US00312263 A US 00312263A US 3794302D A US3794302D A US 3794302DA US 3794302 A US3794302 A US 3794302A
Authority
US
United States
Prior art keywords
fuel
valve
tube
regulating valve
spray tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00312263A
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English (en)
Inventor
R Diener
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.)
Autoelektronik AG
Original Assignee
Autoelektronik AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Autoelektronik AG filed Critical Autoelektronik AG
Application granted granted Critical
Publication of US3794302A publication Critical patent/US3794302A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M17/00—Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
    • F02M17/02—Floatless carburettors
    • 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
    • F02M17/00—Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
    • F02M17/02—Floatless carburettors
    • F02M17/04—Floatless carburettors having fuel inlet valve controlled by diaphragm
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • F02M51/0617—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature having two or more electromagnets
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
    • 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
    • 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
    • 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
    • Y10S261/74—Valve actuation; electrical
    • 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
    • Y10S261/82—Upper end injectors

Definitions

  • ABSTRACT A floatless carburetor for internal combustion engines comprising a suction tube, an air funnel therein, a spray tube opening within the air funnel, a throttle valve in the suction tube ahead of the spray tube, and a main nozzle disposed in a fuel chamber for delivering fuel to said spray tube.
  • the main nozzle is formed as a mechanically and electrically controllable regulating valve.
  • the valve member is drivingly connected to a magnetic ram which itself is connected by means of a resilient intermediary member to the linkage which operates the throttle valve.
  • the magnetic ram can be actuated by electric currents the intensity of which is characteristic for the parameters which determine the preparation of the combustible mixture, whereby an electromagnetic adjustment can be superposed to the mechanical basic adjustment of the throttle valve.
  • Another more specific object of the invention is the provision of an improved floatless carburetor which comprises a suction funnel, a spray tube within the suction funnel, a throttle valve and a main nozzle which serves for metering or dosing the delivery of fuel to the spray tube.
  • the main nozzle is constituted by a mechanically and electrically controllable regulating valve which is connected by an elastic intermediary member with the linkage for adjusting the throttle valve, the electric control component of this regulating valve can be actuated by electric currents the intensity of which is characteristic for the prevailing parameters which determine the preparation of the combustible mixture.
  • the regulating valve will be constituted by a magnetically adjustable ball valve.
  • the regulating valve is associated with a magnetic ram which is resiliently mounted between two diaphragms. It is possible to provide several excitor coils so that the regulating valve can be controlled independently by several function transmitters. It is also preferred to maintain a constant fuel pressure in the valve seat chamber of the regulating valve.
  • the illustrated example of a carburetor according to the invention comprises a suction tube 1 having an air funnel 3.
  • a throttle member 2 within the suction tube 1.
  • the air funnel 3 is formed as a Venturi-tube into which extends a spray tube 4 ending in the zone of the highest vacuum.
  • the spray tube 4 is supplied with fuel by means of a conduit 6 which leads from the spray tube 4 to the valve seat 7 of a regulating ballvalve.
  • a tube connection 5 is branched off the suction tube 1. at a point abovethe throttle member 3 and leads to the conduit 6
  • the valve seat 7 can be closed by a ball 8 which is secured to a valve stem 9.
  • This stem 9 is rigidly connected with a magnetic ram 13 by means of a screw and a sealing member 11.
  • the supply of fuel to the valve seat chamber 23 is effected by a fuel pump 27 which draws the fuel through a conduit 28 and delivers it by a conduit 26 to the valve seat chamber 23.
  • the fuel pressure in the conduit 26 amounts approximatively to 0.2- atmospheric excess pressure.
  • the valve seat chamber is provided with a relief pressure valve corisisting of a valve flap 24 and a spring and which is so adjusted that the pressure in the valve seat chamberis approximatively 0.15 atmospheric excess pressure.
  • Superfluous fuel is returned by a conduit 29 to the inlet of the fuel pump 27.
  • the magnetic circuit for actuating the magnetic ram 13 consists'of a core member 19,.a cylinder yoke 21, and a retraction ring member 22.
  • the magnet winding which can comprise a single or multiple coil is designated by 20.
  • the entire magnetic portion of the regulating valve is tightly closed on the top by a diaphragm through which the magnetic ram extends upwardly.
  • the magnetic ram 13 is mechanically coupled by means of an elastic intermediary member with the linkage 30 for adjusting the throttling member 2.
  • the elastic intermediary member consists of a spring 16 which bears at one end against the nut 15 and with the other end against a cap member 17. 18 designates the last hinge point of the linkage ahead of the cap member 17.
  • the operation of the described carburetor according to the invention is as follows:
  • the fuel is delivered to the valve seat chamber 23 by the pump 27 at aslight overpressure of about 0,2 atmospheric excess pressure and flows from there through the ball valve 7,8, the sectional area of flow thereof depending on the position of the magnetic ram 13.
  • the fuel then flows through the tube 6 and is mixed with air supplied by the tube connection 5 and drawn out of the spray tube 4 by the vacuum prevailing in the air funnel 3.
  • the lever transmission between the throttle member 2 and the magnetic ram 13 can be so chosen that the sectional area of flow of the ball valve 7,8 corresponds to the-actual position of the throttle member during normal operation.
  • the exciter coil 20 is supplied with electric current and the magnetic ram is lifted upwardly against the action of the spring 16, so that the sectional area of flow of the ball valve 7 ,8. is increased.
  • the same action can beproduced for obtaining a movement of acceleration.
  • carburetor according to the invention is of a considerably simpler design than conventional carburetors and injection pumps, and its construction does not require the narrow tolerances called for in conventional carburetor construction and accordingly its fabrication' is more economical.
  • a floatless carburetor for internal combustion engines comprising a suction tube, a suction funnel formed within said tube, a spray pipe arranged to deliver fuel into the suction funnel, a throttle valve within said suction .tube, a main nozzle for metering the delivery of fuel to said spray tube, said main nozzle being formed by a mechanically'and electrically controllable regulating valve, aconduit for delivering fuel from said regulating valve to said spray tube, linkage means for mechanically adjusting said throttle valve, means for electrically controlling said regulating valve by a current responsive member, a valve seat chamber containing said regulating valve and adapted to contain fuel, and an elastic intermediary member connected to said linkage means and to said current responsive member for additional adjustment of said regulating valve in response to the intensity of the electric current, said intensity being characteristic of the parameters determining the preparation of the combustible mixture.
  • a carburetor according to claim 2 in which a tube is branched off said suction-tube and communicates 6 with said fuel delivery conduit leading to said spray tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
US00312263A 1971-12-04 1972-12-05 Floatless carburetor for internal combustion engines Expired - Lifetime US3794302A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2160270A DE2160270A1 (de) 1971-12-04 1971-12-04 Schwimmerloser vergaser fuer brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US3794302A true US3794302A (en) 1974-02-26

Family

ID=5827032

Family Applications (1)

Application Number Title Priority Date Filing Date
US00312263A Expired - Lifetime US3794302A (en) 1971-12-04 1972-12-05 Floatless carburetor for internal combustion engines

Country Status (8)

Country Link
US (1) US3794302A (de)
CH (1) CH554488A (de)
DE (1) DE2160270A1 (de)
FR (1) FR2166984A5 (de)
GB (1) GB1409745A (de)
IT (1) IT971527B (de)
NL (1) NL7216426A (de)
SU (1) SU462350A3 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931368A (en) * 1974-02-04 1976-01-06 Ford Motor Company Fuel flow proportioning valve
US3965221A (en) * 1974-07-03 1976-06-22 Dresser Industries, Inc. Fluid flow device and liquid metering
US3977382A (en) * 1975-09-15 1976-08-31 Borg-Warner Corporation Fuel regulator
US4039638A (en) * 1975-02-22 1977-08-02 Lucas Electrical Limited Fuel supply system for an internal combustion engine
US4152376A (en) * 1977-12-14 1979-05-01 Borg-Warner Corporation Charge forming apparatus with variable air-fuel ratio control
EP0259866A3 (de) * 1986-09-10 1989-06-14 Mikuni Kogyo Kabushiki Kaisha Vergaser
US5178799A (en) * 1991-01-07 1993-01-12 Wilshire Partners Carbonated beverage dispensing apparatus
GB2384526A (en) * 2000-12-29 2003-07-30 Alpina Spa Carburettor for cutting implements
US7377495B1 (en) 2004-03-03 2008-05-27 Thompson Design Innovation, L.L.C. Temperature sensitive pressure regulator for carbonated beverage systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000135A1 (en) * 1979-06-28 1981-01-22 R Marsh Carburettor with magnetically controlled fuel-metering device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2856910A (en) * 1956-04-23 1958-10-21 Acf Ind Inc Fuel injection system
US3566847A (en) * 1968-03-29 1971-03-02 Bosch Gmbh Robert Fuel injection system for internal combustion engines
US3673989A (en) * 1969-10-22 1972-07-04 Nissan Motor Acceleration actuating device for fuel injection system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2856910A (en) * 1956-04-23 1958-10-21 Acf Ind Inc Fuel injection system
US3566847A (en) * 1968-03-29 1971-03-02 Bosch Gmbh Robert Fuel injection system for internal combustion engines
US3673989A (en) * 1969-10-22 1972-07-04 Nissan Motor Acceleration actuating device for fuel injection system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931368A (en) * 1974-02-04 1976-01-06 Ford Motor Company Fuel flow proportioning valve
US3965221A (en) * 1974-07-03 1976-06-22 Dresser Industries, Inc. Fluid flow device and liquid metering
US4039638A (en) * 1975-02-22 1977-08-02 Lucas Electrical Limited Fuel supply system for an internal combustion engine
US3977382A (en) * 1975-09-15 1976-08-31 Borg-Warner Corporation Fuel regulator
US4152376A (en) * 1977-12-14 1979-05-01 Borg-Warner Corporation Charge forming apparatus with variable air-fuel ratio control
EP0259866A3 (de) * 1986-09-10 1989-06-14 Mikuni Kogyo Kabushiki Kaisha Vergaser
US5178799A (en) * 1991-01-07 1993-01-12 Wilshire Partners Carbonated beverage dispensing apparatus
GB2384526A (en) * 2000-12-29 2003-07-30 Alpina Spa Carburettor for cutting implements
GB2384526B (en) * 2000-12-29 2005-03-30 Alpina Spa Carburettor for implements in particular trimmers and bush cutters using cutting line
US7377495B1 (en) 2004-03-03 2008-05-27 Thompson Design Innovation, L.L.C. Temperature sensitive pressure regulator for carbonated beverage systems

Also Published As

Publication number Publication date
IT971527B (it) 1974-05-10
DE2160270A1 (de) 1973-06-14
NL7216426A (de) 1973-06-06
FR2166984A5 (de) 1973-08-17
SU462350A3 (ru) 1975-02-28
CH554488A (de) 1974-09-30
GB1409745A (en) 1975-10-15

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