EP0054457A1 - Vergaser mit zentraler Gemischzugabe - Google Patents

Vergaser mit zentraler Gemischzugabe Download PDF

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Publication number
EP0054457A1
EP0054457A1 EP81401875A EP81401875A EP0054457A1 EP 0054457 A1 EP0054457 A1 EP 0054457A1 EP 81401875 A EP81401875 A EP 81401875A EP 81401875 A EP81401875 A EP 81401875A EP 0054457 A1 EP0054457 A1 EP 0054457A1
Authority
EP
European Patent Office
Prior art keywords
carburetor
air
circuit
centralizer
interior
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
EP81401875A
Other languages
English (en)
French (fr)
Other versions
EP0054457B1 (de
Inventor
Yves Martineau
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.)
OFFERTA DI LICENZA AL PUBBLICO
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0054457A1 publication Critical patent/EP0054457A1/de
Application granted granted Critical
Publication of EP0054457B1 publication Critical patent/EP0054457B1/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
    • F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
    • F02M19/08—Venturis
    • 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
    • Y10S261/39—Liquid feeding nozzles

Definitions

  • the carburetors have a combustion air passage duct provided with a Venturi-shaped part at the neck of which opens an inlet passage for an air-petrol emulsion.
  • a mixing centralizer is provided which divides the combustion air passage into an internal circuit and an external circuit, an air-petrol emulsion inlet pipe opening laterally into the circuit inside, and which is placed so that its downstream edge is at the neck of the air passage.
  • the quantity of petrol admitted into the air passage duct depends on the vacuum which is generated by the internal circuit at the level of the inlet duct of the air-petrol emulsion.
  • the centering devices are most often currently constituted by a simple cylindrical tube in which the emulsion inlet duct opens laterally.
  • centralizers whose internal circuit has the shape of a Venturi, the emulsion inlet conduits opening approximately at the Venturi neck.
  • the flow of air in the interior circuit generates a greater depression at the Venturi neck of the centering device, which allows more gas to be drawn in.
  • This type of centering device is more stable than the previous one.
  • the present invention relates to a centralizing carburetor whose operation is improved compared to the known device.
  • This carburetor is characterized in that the interior air circuit essentially comprises a cylindrical part with a thin wall on the upstream side, and a frustoconical part with a thin wall on the downstream side.
  • the cylindrical and frustoconical parts advantageously have substantially the same height.
  • the inclination of the internal face of the frustoconical part is preferably the same as that of the divergent part forming a diffuser of the air passage duct of the carburetor.
  • a carburetor comprising in the usual manner a fuel tank 1 and an air passage duct (2) which comprises a neck (3) followed by a diffuser (3a) and an adjustment butterfly (4) arranged downstream of the neck.
  • a centralizer (5) is arranged in the passage (2), upstream from the neck (3), and allows this neck to be admixed with an aix-essence emulsion which arrives via a conduit (6).
  • the centralizer 5 comprises a body (7), preferably of light alloy, which is traversed by a thin-walled conduit, with parallel faces, of vertical axis and of circular section.
  • the upper part (8a) of this conduit is cylindrical externally and internally.
  • Its lower part (8b) is tapered internally and externally; its taper is the same as that of the diffuser (3a) of the carburetor.
  • the two parts (8a) and (8b) are substantially the same height.
  • the body (7) is crossed by a horizontal element (9).
  • This element (9) projects laterally on either side of the body (7) and its outer section has the shape of a rectangle whose upper edge is rounded (see Figure 4). It is pierced with a right angle duct which comprises an inlet portion (lOa) opening opposite the passage (6), and an outlet portion (lOb) which opens approximately at the center of the vertical duct (8a-8b) and is directed downward.
  • the inlet portion (10a) has a rectangular cross section with a rounded upper edge, like the element (9). This section is decreasing from the inlet of the conduit to its connection with the outlet portion (10b).
  • This outlet portion is frustoconical and thus forms a diffuser; its taper is the same as that of the internal face of the lower part (8b) of the centralizer duct.
  • the horizontal element (9) further comprises, on the side opposite to the inlet portion (10a) a blind recess (11) in which is housed a spring (12) placing the centering device in abutment on the wall of the carburetor in which opens the passage (6).
  • This centering device is arranged in the air passage duct of the carburetor (2) so that the base of the body (7) is at the level of the neck (3) of this duct.
  • the centralizer divides the air flow passing through the conduit (2) into an external circuit which passes around the centralizer and into an internal circuit which passes through the conduit (8a-8b).
  • the internal circuit generates a vacuum in the pipe 10b so that air-fuel emulsion is drawn into the passage (6) and enters the pipe (2).
  • the centering device which has just been described promotes the flow rate of the interior air circuit to the centering device over the flow rate of the exterior air circuit.
  • the air which passes inside the centralizer and which contains the aspirated gasoline arrives to circumvent the butterfly, on two opposite sides of this one and mixes with the air of the external circuit, as shown in Figure 1.
  • the air charged with gasoline is maintained by the air of the external circuit in the part central duct 2. It crosses the butterfly asymmetrically, predominantly on the side of the lower downstream edge of this butterfly.
  • the flow rate of the interior air circuit is favored by the centralizer according to the invention, it corresponds to a lower depression at the neck 3 so that the resulting mixture downstream of the butterfly valve 4 is both poorer and more homogeneous.
  • the main jet of the carburetor being adjusted for optimal operation at normal speed, the mixture is optimized for a greater speed range than with the usual centralizers; furthermore, transient operation does not present any instabilities.

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)
  • Spray-Type Burners (AREA)
EP81401875A 1980-12-15 1981-11-26 Vergaser mit zentraler Gemischzugabe Expired EP0054457B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8026853A FR2496177B1 (fr) 1980-12-15 1980-12-15 Carburateur a centreur de melange
FR8026853 1980-12-15

Publications (2)

Publication Number Publication Date
EP0054457A1 true EP0054457A1 (de) 1982-06-23
EP0054457B1 EP0054457B1 (de) 1985-01-16

Family

ID=9249212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401875A Expired EP0054457B1 (de) 1980-12-15 1981-11-26 Vergaser mit zentraler Gemischzugabe

Country Status (6)

Country Link
US (1) US4464313A (de)
EP (1) EP0054457B1 (de)
JP (1) JPS57165653A (de)
DE (1) DE3168401D1 (de)
ES (1) ES269987Y (de)
FR (1) FR2496177B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59160841U (ja) * 1983-04-15 1984-10-27 トヨタ自動車株式会社 気化器
US5273688A (en) * 1991-12-09 1993-12-28 Gilbert J. Eastin Carburetor air volume control
JP2000297703A (ja) * 1999-04-09 2000-10-24 Nippon Walbro:Kk 気化器の燃料ジエツト支持構造

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495299A (en) * 1947-09-30 1950-01-24 Bendix Aviat Corp Charge forming device
DE833882C (de) * 1950-09-02 1952-03-13 Hans Westermeier Vergaser fuer Brennkraftmaschinen

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1418756A (en) * 1922-06-06 Sidney d
DE595128C (de) * 1930-10-05 1934-04-06 Vesta Buchpruefungs Und Treuha Schwimmerloser Vergaser
US2152057A (en) * 1938-02-05 1939-03-28 Frank A Kane Nozzle
US2328764A (en) * 1940-07-26 1943-09-07 Bendix Aviat Corp Carburetor
IT454350A (de) * 1946-10-12
US2996290A (en) * 1959-03-23 1961-08-15 Munden Vernon Gasoline saver for internal combustion engines
US3648988A (en) * 1970-07-06 1972-03-14 Oliver D Dibert Carbureting device
DE2330709A1 (de) * 1973-06-16 1975-01-09 Audi Nsu Auto Union Ag Einrichtung zur kraftstoff-luftgemiwch-bildung bei brennkraftmaschinen
JPS524925A (en) * 1975-07-02 1977-01-14 Hitachi Ltd Jet carburetor
US4146596A (en) * 1975-07-31 1979-03-27 Nissan Motor Company, Limited Intake system of an internal combustion engine
JPS5314236A (en) * 1976-07-23 1978-02-08 Hitachi Ltd Carbureter
JPS53140820U (de) * 1977-04-14 1978-11-07

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495299A (en) * 1947-09-30 1950-01-24 Bendix Aviat Corp Charge forming device
DE833882C (de) * 1950-09-02 1952-03-13 Hans Westermeier Vergaser fuer Brennkraftmaschinen

Also Published As

Publication number Publication date
US4464313A (en) 1984-08-07
JPS57165653A (en) 1982-10-12
FR2496177A1 (fr) 1982-06-18
ES269987Y (es) 1984-01-16
FR2496177B1 (fr) 1985-10-11
EP0054457B1 (de) 1985-01-16
DE3168401D1 (en) 1985-02-28
ES269987U (es) 1983-07-01

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