EP0186821A1 - Carburateur à venturi variable - Google Patents

Carburateur à venturi variable Download PDF

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Publication number
EP0186821A1
EP0186821A1 EP85115744A EP85115744A EP0186821A1 EP 0186821 A1 EP0186821 A1 EP 0186821A1 EP 85115744 A EP85115744 A EP 85115744A EP 85115744 A EP85115744 A EP 85115744A EP 0186821 A1 EP0186821 A1 EP 0186821A1
Authority
EP
European Patent Office
Prior art keywords
section
mixing tube
channel
rollers
opposite directions
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.)
Withdrawn
Application number
EP85115744A
Other languages
German (de)
English (en)
Inventor
Bernhard Klein
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.)
Schaeffler Engineering GmbH
Original Assignee
AFT Atlas Fahrzeugtechnik GmbH
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 AFT Atlas Fahrzeugtechnik GmbH filed Critical AFT Atlas Fahrzeugtechnik GmbH
Publication of EP0186821A1 publication Critical patent/EP0186821A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F02M7/18—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel-metering orifice
    • 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
    • F02M9/10—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 valves, or like controls, of elastic-wall type for controlling the passage, or for varying cross-sectional area, of fuel-air mixing chambers or of the entry passage
    • F02M9/103—Mechanical control

Definitions

  • the invention relates to a carburetor with a mixing tube arranged at the narrowest point of a venturi channel, wherein in a plane going approximately through the outlet mouth of the mixing tube and oriented perpendicular to the axis of the venturi channel, two slides can be pivoted in opposite directions to change the flow cross section.
  • a carburetor of this type is described in DE-A-2 714 507 and the corresponding US-A-4 206 158.
  • the venturi channel has an essentially rectangular cross section. When the slide moves, the ratio of the sides of the rectangle changes very greatly, so that the flow geometry changes greatly.
  • the object of the invention is to ensure the same flow geometry and thus constant mixture preparation at all flows.
  • rollers which are aligned parallel to one another and are arranged so as to be rotatable in opposite directions to one another, the cylindrical peripheral surfaces of which touch one another and which in each case have a channel with a semicircular cross-section which runs out in the circumferential direction.
  • the invention differs from the prior art in that the profiles of the rollers change the flow cross section in each case concentrically to the mouth of the mixing tube. This results in a substantially constant flow geometry at the mouth of the mixing tube, so that a constant mixture formation is ensured.
  • a circular flow cross-section is ensured in that the channel has a segment with a semi-circular one Cross section and with a crescent-shaped, tapering in the circumferential direction.
  • the cross section essentially retains the circular shape and only changes to the similar elliptical shape.
  • rollers carry meshing gears.
  • a metering of the fuel supply in accordance with the flow cross-section is ensured in that the mixing tube opens into the circumferential surface of an actuating chamber in which a rotatable actuating piston with an inclined head surface is arranged, which, when it rotates, blocks the outlet opening of the mixing tube.
  • the fuel supply is coupled to the flow cross section in that a spur gear seated on the actuating piston engages with the gear wheel of a roller.
  • the carburetor 1 is a so-called venturi gasifier with a venturi channel 2 and a mixing tube 3 opening coaxially into the venturi channel.
  • a venturi gasifier with a venturi channel 2 and a mixing tube 3 opening coaxially into the venturi channel.
  • two rollers 4 are rotatably arranged parallel to one another , which engage with each other with gear wheels 5, so that the rollers 4 can rotate in opposite directions relative to the engagement of the gear wheels 5.
  • a roller 4 is coupled via a radial arm 19 to a tension element 6 of a throttle cable and a return spring 7. According to the actuation of the tension element 6, the rollers 4 are pivoted in opposite directions to one another.
  • the rollers 4 have channels 8 which are aligned symmetrically to one another.
  • Each trough 8 is a segment cutout with a semicircular cross section, the trough being aligned perpendicular to the axis of the relevant roller 4 according to Q e.
  • Each trough 8 ends at one end in the circumferential direction in a sickle-shaped section 9.
  • the channels 8 in the orientation shown in FIG. 4 form a channel with a circular cross-section in the extension of the inlet funnel 10 of the venturi channel 2.
  • the mixing tube 3 opens centrally within this channel.
  • the DJf connects to the channel in the usual way fusor 11. 3 and 4, the position of the rollers for the largest flow cross-section and in dash-dotted lines for the smallest flow cross-section is indicated in solid lines.
  • the rollers 4 are pivoted against each other.
  • the flow cross section of the carburetor is largest and circular. If the tension element 6 is not actuated, the return spring 7 becomes effective.
  • Corresponding to the rotation of the rollers there is an oval-shaped, decreasing cross-section in which the mixing tube lies centrally.
  • the tapering sections 9 of the channel 8 again ensure a circular cross-section with the smallest flow cross-section, as indicated by dash-dotted lines.
  • the cross-section of the central channel continuously decreases in accordance with the rotation of the rollers.
  • the cross section is always centered around the mouth of the mixing tube 3. As a result, the flow conditions and thus the mixture formation are always the same.
  • the mixing tube 3 is connected to an outlet opening 12 in the peripheral wall of an actuating chamber 13.
  • An actuating piston 14 is rotatably arranged within the actuating chamber 13 and has a bevelled head surface 15.
  • the actuating piston 14 carries at the end a spur gear 16 which meshes with a gear 5 of a roller 4 so that the actuating piston 14 is pivoted synchronously with the rotation of the rollers 4.
  • a tube 17 extends into the actuating chamber 13, which plunges into a float chamber 18 and through which the fuel flows.
  • the outlet opening 12 is partially opened and closed in accordance with the rotation of the rollers 4 and the rotation of the actuating piston 14, so that the fuel supply is metered in accordance with the effective opening of the venturi channel 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Catching Or Destruction (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Disintegrating Or Milling (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
EP85115744A 1984-12-15 1985-12-11 Carburateur à venturi variable Withdrawn EP0186821A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843445841 DE3445841A1 (de) 1984-12-15 1984-12-15 Venturivergaser
DE3445841 1984-12-15

Publications (1)

Publication Number Publication Date
EP0186821A1 true EP0186821A1 (fr) 1986-07-09

Family

ID=6252892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115744A Withdrawn EP0186821A1 (fr) 1984-12-15 1985-12-11 Carburateur à venturi variable

Country Status (3)

Country Link
EP (1) EP0186821A1 (fr)
JP (1) JPS62129555A (fr)
DE (1) DE3445841A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7102078B2 (en) 2004-06-24 2006-09-05 I F M Electronic Gmbh Housing for holding electrical and/or electronic components

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR547335A (fr) * 1922-02-16 1922-12-07 Carburateur à diffuseur extensible
GB621142A (en) * 1946-07-09 1949-04-05 John Percival Beeston Improvements in or relating to valves
DE2049765A1 (de) * 1969-10-10 1971-04-22 Kendig, Willard Zareh, Yettem, CaUf(VStA) Kraftstoff Dosiervorrichtung fur Brennkraftmaschinen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1013223A (en) * 1973-07-30 1977-07-05 Dresser Industries Fuel introduction device for internal combustion engine
GB1502984A (en) * 1975-03-14 1978-03-08 Ford Motor Co Variable venturi carburettor
US4206158A (en) * 1976-04-05 1980-06-03 Ford Motor Company Sonic flow carburetor with fuel distributing means
US4231971A (en) * 1979-04-11 1980-11-04 Dresser Industries, Inc. Flow method and device
US4305892A (en) * 1979-08-08 1981-12-15 Borg-Warner Corporation Carburetor
DE3200744A1 (de) * 1982-01-13 1983-07-21 Werner Karl-Heinz 2000 Hamburg Hintze Vergaserdiffusor aus nicht starrem material, fuer ottomotoren

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR547335A (fr) * 1922-02-16 1922-12-07 Carburateur à diffuseur extensible
GB621142A (en) * 1946-07-09 1949-04-05 John Percival Beeston Improvements in or relating to valves
DE2049765A1 (de) * 1969-10-10 1971-04-22 Kendig, Willard Zareh, Yettem, CaUf(VStA) Kraftstoff Dosiervorrichtung fur Brennkraftmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7102078B2 (en) 2004-06-24 2006-09-05 I F M Electronic Gmbh Housing for holding electrical and/or electronic components

Also Published As

Publication number Publication date
JPS62129555A (ja) 1987-06-11
DE3445841A1 (de) 1986-06-19

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Inventor name: KLEIN, BERNHARD