EP0009318A1 - Vergaser - Google Patents

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Publication number
EP0009318A1
EP0009318A1 EP79301645A EP79301645A EP0009318A1 EP 0009318 A1 EP0009318 A1 EP 0009318A1 EP 79301645 A EP79301645 A EP 79301645A EP 79301645 A EP79301645 A EP 79301645A EP 0009318 A1 EP0009318 A1 EP 0009318A1
Authority
EP
European Patent Office
Prior art keywords
fuel
throat
air
carburettor
cam
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.)
Granted
Application number
EP79301645A
Other languages
English (en)
French (fr)
Other versions
EP0009318B1 (de
Inventor
Albert Saunders
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.)
Saunders J & F Carburettor Co Ltd
Original Assignee
Saunders J & F Carburettor Co Ltd
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 Saunders J & F Carburettor Co Ltd filed Critical Saunders J & F Carburettor Co Ltd
Publication of EP0009318A1 publication Critical patent/EP0009318A1/de
Application granted granted Critical
Publication of EP0009318B1 publication Critical patent/EP0009318B1/de
Expired 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/16—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors
    • F02M69/18—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air
    • F02M69/24—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air the device comprising a member for transmitting the movement of the air throttle valve actuated by the operator to the valves controlling fuel passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/12—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves
    • F02M7/22—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves fuel flow cross-sectional area being controlled dependent on air-throttle-valve position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M9/00—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position
    • F02M9/08—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having throttling valves rotatably mounted in the passage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M9/00—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position
    • F02M9/08—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having throttling valves rotatably mounted in the passage
    • F02M9/085—Fuel spray nozzles in the throttling valves

Definitions

  • This invention relates to an improved carburettor.
  • a simple suction carburettor essentially comprises a venturi and one or more fuel jets fed from a float chamber.
  • a butterfly throttle valve is generally used to control the amount of the mixture that passes into the engine from the induction system.
  • a floatless carburettor comprising in combination a fuel inlet, two separate fuel outlets to an air passage adapted to admit air from the atmosphere and discharge it to an engine, a throttle control means by which the area of said air passage is progressively opened and closed to vary said area and an adjustable self-regulating pressure means via which fuel is fed from the said fuel inlet to the carburettor.
  • a floatless carburettor is seen to comprise a body 10 having an integral extension 10A screwed at 11E to a flange body 11D having a flange 11 provided with bolt fixing holes 11A, 11B ( Figure 3) and screwed to the body at 11C.
  • Engine manifold air enters as shown by arrows A1.A2 ( Figure 2) via ports 12A. 12B. in an accelerator sleeve 12 that is provided with throttle control means in the form of an integral lever arm 12C naviug at its extremity a bolt fixing hole 12D.
  • the manifuld air passes via the ports 12A, 12B respectively to opening 13A, 13B in flange body 11D and discharges to an engine via passageway 13C making a right angle turn in so doing.
  • Clearly rotation of accelerator sleeve 12 about flange body 11D progressively opens and closes the openings 13A, 13B.
  • the body 10 contains a number of fuel passageways. Fuel enters the carburettor (arrow F1) via pipe 14 from the fuel pump P along a passageway 14A to a self-regulating pressure means shown generally at 15 (Figure 1A) that comprises a ball 15A that seats on a seat 15B in a screwed union 15C and is forced against the fuel flow, shown by arrow F1, by a helical compression spring 15D acting on a compensatory cup 15E having a spigot 15G. A spring cap 15H together with compensatory cup 15E accept the opposed ends of helical spring 15D. Spring cap 15H has a recess 15K for a screw 15L having a head 15L 1 which is a mair adjustment head for valve 15.
  • Screw 15L passes through a complex fuel gland comprising a plastics washer 15M a plastics packing 15N which packing is adjustable to prevent fuel leakage by virtue of co-acting parts 15p1, 15p2, 15p3.
  • the compensatory cup 15E operates by the back pressure of the fuel and extends across centre lines A , B of Figure 1 which centre lines define the centres lines define the centres of fuel outlets F2 and F3 of Figure 1.
  • F2 is the idler outlet and F3 is the outlet for normal running.
  • a fuel passageway 16 normal to passageway 14A is adjustable by virtue of a valve shown generally at 17 that comprises essentially a frusto-conical valve end 17A and seat 17B; the said end 17A having therein a hole 17C that extends in line with passageway 16.
  • the frusto-conical valve end 17A has an extension 17D provided with a knurled end 17E and locknut 17F.
  • the said end 17A is able to be forced against its seat 17B by a screwed member 18 having an hexagonal end 18A and locknut 18B.
  • a further fuel passageway 19 normal to 14A is provided with a valve shown generally at 24.
  • Valve 24 comprises a frusto-conical valve 24A in a frusto-conical valve seat 24B.
  • a helical compression spring 24C co-operates with valve 24B that has a complex form since its stem 24E contains parallel to its axis
  • a a tapered groove 24F providing a V throat progressively increasable in area upon opening and progressively decreasable in area upon closing; the groove is at its most wide toward the lower part 1 and at its most narrow toward the upper part as shown in Figure 1.
  • a hexagonal headed screwed member 24G retains the spring 24C ana has an orifice that receives the said stem 24E.
  • the linkage comprises a lifter arm 25 co-operating with a serrated nut 24H 1 and locknut 24H 2 screwed onto a screw threaded part 24K of stem 24E.
  • Lifter arm 25 is fixed at 25A to a rod 25B spring urged via helical compression spring 25C in guide box 25D that is integral with flange body 11L.
  • the box 25D has a screw cap spring seat 25E.
  • the rod 25B rests upon flat face 2bA of a cam 26 that is adjustable in its inclination to axis A ( Figure 3) as shown by line Y1Y2 in the plane of the flat face 26A of cam 2b.
  • the flat face 26A may for convenience be set, in respect of end point 25F ( Figure 3) of rod 25B, to be at an angle ⁇ to a line Z25F normal to line Y1Y2.
  • the adjustability and the setting of angle ⁇ of cam 26A is effected by two co-operating eccentrics 27A, 27B, these are shown most clearly in Figure 4.
  • the diameter d1 of eccentric 27A is greater than the diameter d2 of eccentric 27B.
  • the eccentrics co-operate about their respective pivot points 27A p 27Bp with curved recesses 28A, 28B in the underside of cam 26.
  • the cam 26 has a pair of slots 26B, 26C and these are loosely fitted over bolts B1, B2 ( Figure 3) that are co-incident with centres 27A p 27Bp.
  • Each eccentric 27A, 27B has an extension having a knurled end K1 K2 that may be locked in position on its respective bolt B1 B2 by a locknut L1 L2.
  • Clearly such a linkage offers a multiplicity of accurate settings commensurate with the air/fuel mixtures at different running conditions of the engine.
  • Passageway 16 is adjustable by valve 17. Passageway 19 is adjustable by valve 24. Fuel inlet to the carburettor is adjustable via self regulating pressure valve 15. Consider now that the carburettor in use is fitted to a particular engine then the fuel supply is first adjusted to the requisite pressure p from fuel pump P (not shown). Fuel passes to fuel passageway 16 and the idling or slow running requirement of the engine are adjusted by valve 17 and fuel issues from the outlet at F2, which outlet may be fan shaped if necessary.
  • Fuel also passes to fuel passageway 19 and the intermediate and fast running requirements of the engine are adjusted by the arm 12C attached to the accelerator whicn actuates openings 13A, 13B in relation to air ports 12A, 12B and actuates rod 25B in co-operation with surface 26A to vary the position of tapered V groove 24F which by its vertical position in passageway 19 control the V throat opening at fuel outlet F3 which is most clearly shown at F3 in Figure 2.
  • valve 24 from its setting on spring 24C demands fuel and this is supplied via the variable V throat at F3, which for any given engine is defined by:-
  • double screwed glands may be employed.

Landscapes

  • 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)
EP19790301645 1978-09-27 1979-08-14 Vergaser Expired EP0009318B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3842178 1978-09-27
GB7838421A GB2030215A (en) 1978-09-27 1978-09-27 Floatless carburettor

Publications (2)

Publication Number Publication Date
EP0009318A1 true EP0009318A1 (de) 1980-04-02
EP0009318B1 EP0009318B1 (de) 1982-03-17

Family

ID=10499956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790301645 Expired EP0009318B1 (de) 1978-09-27 1979-08-14 Vergaser

Country Status (4)

Country Link
EP (1) EP0009318B1 (de)
JP (1) JPS5546087A (de)
DE (1) DE2962288D1 (de)
GB (1) GB2030215A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131083A (en) * 1982-11-24 1984-06-13 Albert Saunders Carburettor
EP1138925A2 (de) * 2000-03-29 2001-10-04 Walbro Japan, Inc. Drehschiebervergaser

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU642342B2 (en) * 1991-02-27 1993-10-14 Fujitsu Ten Ltd. Circuit for sensing pulse-like noise in AM receiver

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE496591C (de) * 1928-12-15 1930-04-24 Rudolf Richter Vergaser
FR1042918A (fr) * 1951-04-25 1953-11-04 Carburateur
US2783033A (en) * 1954-03-08 1957-02-26 Eugene E Halik Floatless carburetor
US3102152A (en) * 1961-11-01 1963-08-27 Fuel Controls Corp Fuel-handling devices
US3161700A (en) * 1959-07-28 1964-12-15 Chrysler Corp Return flow carburetor
US3331360A (en) * 1966-07-22 1967-07-18 Robert L Fleming Anti-smog carburetor for internal combustion engines
US3640512A (en) * 1969-07-14 1972-02-08 Henri Morgenroth Meteringrod carburetor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE496591C (de) * 1928-12-15 1930-04-24 Rudolf Richter Vergaser
FR1042918A (fr) * 1951-04-25 1953-11-04 Carburateur
US2783033A (en) * 1954-03-08 1957-02-26 Eugene E Halik Floatless carburetor
US3161700A (en) * 1959-07-28 1964-12-15 Chrysler Corp Return flow carburetor
US3102152A (en) * 1961-11-01 1963-08-27 Fuel Controls Corp Fuel-handling devices
US3331360A (en) * 1966-07-22 1967-07-18 Robert L Fleming Anti-smog carburetor for internal combustion engines
US3640512A (en) * 1969-07-14 1972-02-08 Henri Morgenroth Meteringrod carburetor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131083A (en) * 1982-11-24 1984-06-13 Albert Saunders Carburettor
EP1138925A2 (de) * 2000-03-29 2001-10-04 Walbro Japan, Inc. Drehschiebervergaser
EP1138925A3 (de) * 2000-03-29 2002-08-21 Walbro Japan, Inc. Drehschiebervergaser

Also Published As

Publication number Publication date
JPS5546087A (en) 1980-03-31
EP0009318B1 (de) 1982-03-17
GB2030215A (en) 1980-04-02
DE2962288D1 (en) 1982-04-15

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