DE673510C - Downdraft carburetor for internal combustion engines - Google Patents

Downdraft carburetor for internal combustion engines

Info

Publication number
DE673510C
DE673510C DED73761D DED0073761D DE673510C DE 673510 C DE673510 C DE 673510C DE D73761 D DED73761 D DE D73761D DE D0073761 D DED0073761 D DE D0073761D DE 673510 C DE673510 C DE 673510C
Authority
DE
Germany
Prior art keywords
valve
internal combustion
combustion engines
fuel
cone
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
DED73761D
Other languages
German (de)
Inventor
Bailey Pollard Dawes
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of DE673510C publication Critical patent/DE673510C/en
Expired legal-status Critical Current

Links

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
    • F02M7/22—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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/36—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for adding fluids other than exhaust gas to the recirculation passage; with reformers
    • 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
    • F02M9/12—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 other specific means for controlling the passage, or for varying cross-sectional area, of fuel-air mixing chambers
    • F02M9/127—Axially movable throttle valves concentric with the axis of the mixture 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
    • F02M9/12—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 other specific means for controlling the passage, or for varying cross-sectional area, of fuel-air mixing chambers
    • F02M9/127—Axially movable throttle valves concentric with the axis of the mixture passage
    • F02M9/133—Axially movable throttle valves concentric with the axis of the mixture passage the throttle valves having mushroom-shaped bodies
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M2026/001—Arrangements; Control features; Details
    • F02M2026/002—EGR valve being controlled by vacuum or overpressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

Fallstromvergaser für Brennkraftmaschinen Die Erfindung betrifft einen Fallstromvergaser für Brennkraftmaschinen, bei dem die Verbrennungsluft über- eizz sich ihrem Strömungsdruck entsprechend öffnendes Ventil zur Gemischkammer strömt und bei dem das Ventil ein in der vertikalen Achse der Kammer liegendes Nadelventil verstellt.Downdraft carburetors for internal combustion engines The invention relates to a Downdraft carburetors for internal combustion engines, in which the combustion air over- eizz The valve that opens according to its flow pressure flows to the mixture chamber and in which the valve is a needle valve lying in the vertical axis of the chamber adjusted.

Gemäß der Erfindung wird über der- Einspritzöffnung des Brennstoffnadelventils an der Ventilstange eine Kegelfläche derart angeordnet, daß sie bei Leerlaufstellung mit der Düsenmündung einen kegelförmigen Spalt bildet, daß sie sich aber ,auf die Düsenmündung absperrend auflegt, wenn das von der Verbrennungsluft beeinflußte Ventil geschlossen ist. Durch diese Ausgestaltung des Nadelventils wird erzielt, daß beim Leerlauf der Drennsboffstrahl durch Aufprall ,auf die Kegelfläche in Kegelmantelform sehr fein zerstäubt und mit der Verbrennungsluft gut durchgemischt wird, so daß eine gute Verbrennung gesichert ist. Das Aufsetzen des Kegels auf die Düsenmündung des Nadelventils bei nicht arbeitendem Motor sichert. zweckmäßig gegen Verluste flüssigen Brennstoffs.According to the invention is above the injection port of the fuel needle valve a conical surface arranged on the valve rod in such a way that it is in the idle position with the nozzle mouth forms a conical gap, but that it is on the Shut off nozzle orifice when the valve is influenced by the combustion air closed is. This configuration of the needle valve ensures that when Idling of the Drennsboffstrahl due to impact on the conical surface in the shape of a cone very finely atomized and mixed well with the combustion air so that a good burn is assured. Placing the cone on the nozzle mouth of the needle valve when the engine is not working. expedient against losses liquid fuel.

Die Erfindung ist durch die Zeichnung beispielsweise dargestellt, und zwar ist Fig. i ein senkrechter Schnitt durch die Vergaserachse; Fig. 2 ein Schnitt -nach Linie 2-2 in Fig. i, Fig.3 in größerem Maßstabe ein Schnitt durch das Nadelventil selbst.The invention is illustrated by the drawing, for example, namely Fig. i is a vertical section through the carburetor axis; Fig. 2 a Section - according to line 2-2 in Fig. I, Fig.3 on a larger scale a section through the needle valve itself.

Der Fallstromvergaser besitzt ein zweiteiliges Gehäuse i, 2. Im Teil i ist die Mischkammer 4 angeordnet und im Teil 2, dem die Luft bei 6 zufließt, die Drossel 7. Zwischen den beiden Teilen i, 2 liegt lein selbsttätiges Kegelventil 18, das sich nach Maßgabe der Strömungsenergie der zuströmenden Luft mehr,oder weniger weit öffnet und parallel zu dem zwei nicht Gegenstand der Erfindung bildende regelbare Umgehungskanäle 35 und 39 bei der dargestellten Ausführungsform vorgesehen sind.The downdraft carburetor has a two-part housing i, 2. In part i, the mixing chamber 4 is arranged and in part 2, to which the air flows in at 6, the throttle 7. Between the two parts i, 2 there is an automatic cone valve 1 8, which is opens to a greater or lesser extent depending on the flow energy of the inflowing air and is provided parallel to the two controllable bypass channels 35 and 39 , which are not the subject of the invention, in the embodiment shown.

. Die Brennstoffzuführung erfolgt am unteren Ende der Mischkammer q. durch eine Leitung j o und ein Ansatzstück i i, dessen Mündung 12 durch ein Nadelventil 13 gesteuert wird. Das Gebilde i o bis 13 liegt in einem Gehäuse 14, dessen Innenraum 15 zur Vorwärmung des Brennstoffs und zur Unterstützung der Zerstäubung Heißluft, Gas oder Dampf durch eine Leitung 16 zugeführt werden kann. Beispielsweise kann die Leitung 16 an den Auspuff der Brennkraftmaschine angeschlossen sein.. The fuel is supplied at the lower end of the mixing chamber q. through a line j o and an extension piece i i, the mouth 12 of which through a needle valve 13 is controlled. The structure i o to 13 lies in a housing 14, the interior of which 15 to preheat the fuel and to support the atomization of hot air, Gas or steam can be supplied through line 16. For example, can the line 16 must be connected to the exhaust of the internal combustion engine.

Das Nadelventil 13 sitzt am unteren Ende einer Stange 22, die eine Feder 34 nach unten zu treiben sucht und die über einen doppelarmigen Hebel 3o mit dem Kegelventil 18 gekuppelt ist. Bei stillstehendem Motor schließt sich das Ventil 18, und die Feder 34 treibt das Nadelventil 13 ganz nach unten, so, daß es die Spritzöffnung 12 abschließt, während nach Anlaufen des Motors entsprechend dem öffnungsweg des Ventils 18 auch das Nadelventil mehr oder weniger weit angehoben wird.The needle valve 13 is seated at the lower end of a rod 22, which tends to drive down a spring 34 and which is coupled via a two-armed lever 3o with the plug valve 1 8. When the engine is at a standstill, the valve 18 closes and the spring 34 drives the needle valve 13 all the way down so that it closes the injection opening 12, while after the engine has started, the needle valve is raised to a greater or lesser extent according to the opening path of the valve 18 .

Zwischen dem Nadelventil 13 und der Stange 22 ist eine Kegelfläche 52 angeordnet, die in der Schließstellung der Ventile 18 und 13 sich auf eine Fläche 17 am oberen Ende des Gehäuses 14 aufsetzt. Wird das Nadelventil bei geringen Motorgeschwindigkeiten leicht geöffnet, so bildet sich zwischen 17 und dem Kegel 52 ein enger Ringspalt, der den Durchtritt für die bei 16 zugeführte Luft o. dgl. freigibt. Der aus der Spritzdüse 12 ausströmende Brennstoff wird an dieser Stelle bei geringen öffnungen des Ventils 18 (und demnach auch bei geringen Drosselöffnungen und im besonderen Leerlauf) besonders fein zerstäubt. Dadurch, daß bei geschlossenem Ventil 18 und nichtlaufender Maschine der Kegel 52 sich auf den Sitz 17 aufsetzt, werden auch Brennstoffverluste verhindert.Between the needle valve 13 and the rod 22 there is a conical surface 52 which, in the closed position of the valves 18 and 13, rests on a surface 17 at the upper end of the housing 14. If the needle valve is opened slightly at low engine speeds, a narrow annular gap is formed between 17 and the cone 52 , which opens the passage for the air or the like supplied at 16. The fuel flowing out of the spray nozzle 12 is atomized particularly finely at this point if the valve 18 has small openings (and therefore also if the throttle openings are small and in particular when it is idling). Because the cone 52 rests on the seat 17 when the valve 18 is closed and the engine is not running, fuel losses are also prevented.

Claims (1)

PATENTANSPRUCH: Fallstromvergaser, bei dem die Verbrennungsluft über ein entsprechend dem Strömungsdruck der Luft sich öffnendes Kegelventil zur Mischkammer strömt und in Verbindung mit dem Kegelventil ein. Brennstoffnadelventil, das in der vertikalen Achse der Mischkammer liegt, verstellt wird, dadurch gekennzeichnet, daß über der Einspritzöffnung an der Ventilstange des Brennstoffventils (i i, 13) eine Kegelfläche (52) derart angeordnet ist, daß sie bei Leerlaufstellung mit der Düsenmündung einen kegelförmigen Spalt bildet und bei geschlossenem Kegelventil sich auf die Düsenmündung absperrend auflegt.PATENT CLAIM: Downdraft carburetor, in which the combustion air over a cone valve to the mixing chamber that opens according to the flow pressure of the air flows in and in connection with the cone valve. Fuel needle valve that is included in the vertical axis of the mixing chamber is adjusted, characterized in that that above the injection opening on the valve rod of the fuel valve (i i, 13) a conical surface (52) is arranged such that it is in the idle position with the The nozzle orifice forms a conical gap and when the cone valve is closed hangs up on the nozzle opening to shut off.
DED73761D 1935-10-25 1936-10-25 Downdraft carburetor for internal combustion engines Expired DE673510C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US481139XA 1935-10-25 1935-10-25

Publications (1)

Publication Number Publication Date
DE673510C true DE673510C (en) 1939-03-23

Family

ID=21952810

Family Applications (1)

Application Number Title Priority Date Filing Date
DED73761D Expired DE673510C (en) 1935-10-25 1936-10-25 Downdraft carburetor for internal combustion engines

Country Status (3)

Country Link
DE (1) DE673510C (en)
FR (1) FR812489A (en)
GB (1) GB481139A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747986C (en) * 1940-10-11 1944-10-23 Carburettor with needle control
FR2434274A1 (en) * 1978-08-21 1980-03-21 Bussery Guy Carburettor for petrol engine - uses vacuum in inlet chamber to actuate mechanism to increase fuel flow during acceleration
EP0728935A1 (en) * 1995-02-21 1996-08-28 Tk Carburetor Co., Ltd. Carburetor having metering valve with improved air-fuel ratio adjusting performance

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20130554A1 (en) * 2013-10-09 2015-04-10 Telair S R L CARBURETOR, FOR THE SUPPLY OF BURNING MOTORS.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747986C (en) * 1940-10-11 1944-10-23 Carburettor with needle control
FR2434274A1 (en) * 1978-08-21 1980-03-21 Bussery Guy Carburettor for petrol engine - uses vacuum in inlet chamber to actuate mechanism to increase fuel flow during acceleration
EP0728935A1 (en) * 1995-02-21 1996-08-28 Tk Carburetor Co., Ltd. Carburetor having metering valve with improved air-fuel ratio adjusting performance

Also Published As

Publication number Publication date
GB481139A (en) 1938-03-07
FR812489A (en) 1937-05-11

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