EP0009318B1 - Vergaser - Google Patents

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Publication number
EP0009318B1
EP0009318B1 EP19790301645 EP79301645A EP0009318B1 EP 0009318 B1 EP0009318 B1 EP 0009318B1 EP 19790301645 EP19790301645 EP 19790301645 EP 79301645 A EP79301645 A EP 79301645A EP 0009318 B1 EP0009318 B1 EP 0009318B1
Authority
EP
European Patent Office
Prior art keywords
fuel
air
carburettor
cam
adjustable
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
Application number
EP19790301645
Other languages
English (en)
French (fr)
Other versions
EP0009318A1 (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 a carburettor.
  • a suction carburettor mounted at the entrance to the engine inlet manifold simultaneously to control the admission of air and fuel.
  • 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.
  • air is drawn through the venturi and past the metering jet, its velocity increases and the pressure at the venturi is reduced in proportion to the air flow. Meanwhile the pressure acting on the fuel bowl is substantially atmospheric, so that the resultant pressure differences forces the fuel through the metering jet into the air stream where it is atomized by the high velocity air.
  • the venturi and fuel jet sizes have been selected, the amount of fuel drawn from the jet depends on the pressure drop produced by the venturi.
  • US - A - 3 102 152 describes a fuel-handling device injecting fuel into the air stream of an engine by means of a positive pressure, having a metering system to regulate the fuel when the engine is idling and having a second metering system to regulate the fuel when the engine is running.
  • This floatless device comprises a fuel inlet, a throttle control means by which the area or an air passage is progressively opened and closed to vary said area, an adjustable self-regulating pressure means via which fuel is fed from said fuel inlet to air passage and one fuel outlet to the air passage adapted to admit air from the atmosphere and discharge it to an engine.
  • US - A - 3 331 360 describes an anti-smog carburettor and comprises two separate fuel outlets to an air passage. The first outlet controls the fuel flow rate at engine speeds above the idle range, the second outlet controls the fuel flow rate at engine speeds in the idle range.
  • a floatless carburettor having in combination a fuel inlet, two separate fuel passageway and 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, an adjustable self-regulating pressure means via which fuel is fed from the said fuel inlet to the carburettor and wherein each of said fuel passageways is adjustable by a valve, one fuel outlet being an idling outlet and the other having a V shaped throat variable in area that is progressively increased and decreased as the opening of said air passage is progressively increased and decreased in area, said V shaped throat and said air passage opening both cooperating with said throttle control means that directly opens and closes said opening of said air passage and via an adjustable flat cam.
  • a floatless carburettor is seen to comprise a body 10 having an integral extension 10A screwed at 11 E to a flange body 11 D having a flange 11 provided with bolt fixing holes 11 A, 11 B ( Figure 3) and screwed to the body at 11 C.
  • Engine manifold air enters as shown by arrows A1.
  • A2 Figure 2
  • ports 12A. 12B. in an accelerator sleeve 12 that is provided with throttle control means in the form of an integral lever arm 12C having at its extremity a bolt fixing hole 12D.
  • the manifold 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 11 D 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 1 A) 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 1 5G. 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, which is a main 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 1 5p 1, 1 5p2, 1 5p3.
  • 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 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 24A 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 and at its most narrow toward the upper part as shown in Figure 1.
  • a hexagonal headed screwed member 24G retains the spring 24C and has an orifice that receives the said stem 24E.
  • the linkage comprises a lifter arm 25 co-operating with a serrated nut 24H, and locknut 24H z screwed onto a screw threaded part 24K of stem 24B.
  • 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 11 D.
  • the box 25D has a screw cap spring seat 25E.
  • the rod 25B rests upon flat face 26A of a cam 26 that is adjustable in its inclination to axis A ( Figure 3) as shown by line Yl Y2 in the plane of the flat face 26A of cam 26.
  • 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 a to a line Z-25F normal to line Y1-Y2.
  • 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 27Ap, 27B P 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 27Ap, 27B P .
  • 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 which 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.
  • the carburettor of the invention will not catch fire.

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)

Claims (4)

1. Schwimmerloser Vergaser, der in Kombination aufweist: einen Kraftstoffeinlaß (14), zwei getrennte Kraftstoffdurchgänge (16, 19)L und -ausgänge (F2, F3) zu einem Luftdurchgang, der ausgebildet ist, um Luft aus der Umgebung einzulassen und an einen Motor abzugeben, eine Drosselregeleinrichtung, mit der die Fläche des Luftdurchgangs fortschreitend geöffnet und geschlossen wird, im diese Fläche zu verändern, eine einstellbare, selbstregulierende Druckeinrichtung (15), über die Kraftstoff von dem Kraftstoffeinlaß (14) zu dem Vergaser geführt wird, und in welchem jeder Kraftstoffdurchgang (16, 19) durch ein Ventil (17, 24) einstellbar ist, wobei ein Kraftstoffausgang (F2) ein Leerlaufausgang ist und der andere (F3) eine V-förmige Engstelle (24F) hat, die in der Fläche veränderbar ist, die fortschreitend vergrößert und verkleinert wird, wenn die Öffnung des Luftdurchgangs (13A, 13B) in der Fläche fortschreitend vergrößert oder verkleinert wird, wobei beide sowohl die V-förmige Engstelle (24F) als auch die Luftdurchgangsöffnung (13A, 13B) mit der Drosselregeleinrichtung zusammenwirken, die unmittelbar die Öffnung des Luftdurchgangs aufmacht und schließt und über einen einstellbaren, flachen Nocken (26) der V-förmigen Engstelle (24F) eine lineare Bewegung aufgibt, um am Austritt ein Luft/Kraftstoffverhältnis zu schaffen, das durch den Nocken (26) für jeden vorgegebenen Motor, an dem der Vergaser angebracht ist, verschieden im voraus festlegbar ist und das nach seiner Festlegung automatisch mit dem Öffnen und Schließen der Drosselregeleinrichtung über den Nocken (26) veränderbar ist.
2. Schwimmerloser Vergaser nach Anspruch 1, dadurch gekennzeichnet, daß die einstellbare, selbstregulierende Druckeinrichtung (15) ein einstellbares Kugelventil (1 5A) und einen Kompensationsnapf (15E) aufweist, der durch einen Gegendruck des Kraftstoffs betätigt wird.
3. Schwimmerloser Vergaser nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, daß der Kraftstoff von der V-Engstelle (24F) von der Neigung (a) des Nockens (26), der Tiefe und Breite der V-Rille und der linearen Bewegung der Engstelle in ihrer Bohrung abhängig ist, wobei die Bewegung durch die Neigung gesteuert wird.
4. Schwimmerloser Vergaser nach Anspruch 3, dadurch gekennzeichnet, daß die Neigung des Nockens (26) mittels mindestens eines Exzenters (27A, 27B) einstellbar ist.
EP19790301645 1978-09-27 1979-08-14 Vergaser Expired EP0009318B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131083B (en) * 1982-11-24 1986-01-22 Albert Saunders Carburettor
WO1992016056A1 (en) * 1991-02-27 1992-09-17 Fujitsu Ten Limited Circuit for sensing pulse-like noise in am receiver
JP2001280197A (ja) * 2000-03-29 2001-10-10 Walbro Japan Inc ロータリ絞り弁式気化器

Family Cites Families (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

Also Published As

Publication number Publication date
JPS5546087A (en) 1980-03-31
EP0009318A1 (de) 1980-04-02
GB2030215A (en) 1980-04-02
DE2962288D1 (en) 1982-04-15

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