DE3205935A1 - Secondary air feed - Google Patents

Secondary air feed

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Publication number
DE3205935A1
DE3205935A1 DE19823205935 DE3205935A DE3205935A1 DE 3205935 A1 DE3205935 A1 DE 3205935A1 DE 19823205935 DE19823205935 DE 19823205935 DE 3205935 A DE3205935 A DE 3205935A DE 3205935 A1 DE3205935 A1 DE 3205935A1
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DE
Germany
Prior art keywords
carburetor
air
liquid fuel
gas
bore
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Withdrawn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
DE19823205935
Other languages
German (de)
Inventor
Erich A. 7406 Mössingen Dolderer
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.)
Hopt Karl GmbH
Original Assignee
Hopt Karl GmbH
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Filing date
Publication date
Application filed by Hopt Karl GmbH filed Critical Hopt Karl GmbH
Priority to DE19823205935 priority Critical patent/DE3205935A1/en
Publication of DE3205935A1 publication Critical patent/DE3205935A1/en
Withdrawn legal-status Critical Current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
    • F02M23/00—Apparatus for adding secondary air to fuel-air mixture
    • F02M23/04—Apparatus for adding secondary air to fuel-air mixture with automatic control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0602—Control of components of the fuel supply system
    • F02D19/0613—Switch-over from one fuel to another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • F02D19/0647—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
    • 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
    • F02M13/00—Arrangements of two or more separate carburettors; Carburettors using more than one fuel
    • F02M13/08—Carburettors adapted to use liquid and gaseous fuels, e.g. alternatively
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0239—Pressure or flow regulators therefor
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/04—Gas-air mixing apparatus
    • F02M21/047—Venturi mixer
    • 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
    • F02M7/14—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel spray nozzle
    • F02M7/16—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel spray nozzle operated automatically, e.g. dependent on exhaust-gas analysis
    • F02M7/17—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel spray nozzle operated automatically, e.g. dependent on exhaust-gas analysis by a pneumatically adjustable piston-like element, e.g. constant depression carburettors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

Carburettors for liquid fuels (petrol), comprising a housing (1), the venturi (2), the nozzle holder (3), are provided for operation with gaseous fuel with a bypass (9) controllable by a solenoid valve (10), by means of which it is possible to open a bypass from the inlet (11) of the carburettor parallel to the air flow through the venturi (2), the total cross-section of the venturi (2) and bypass (9) being increased so that as a result the filling of the engine is also increased. This has a favourable effect on the performance in gas operation. <IMAGE>

Description

Sekundärluft-Zuführung Secondary air supply

In steigendem Maße werden Verbrennungsmotoren durch Treibgase wie z.B. LPG, Methan oder Wasserstoff angetrieben.Increasingly, combustion engines are driven by propellants such as e.g. LPG, methane or hydrogen powered.

Diese Antriebsart stellt keine Neuheit dar, es wurden schon vor ca. 50 Jahren hierüber Untersuchungen angestellt.This type of drive is not a novelty, it was already approx. Investigated about this for 50 years.

Z.Zt. werden speziell Kraftfahrzeuge für den sogenannten Zweistoffbetrieb ausgerüstet. Hier kann wahlweise mit einem Flüssigtreibstoff wie Benzin und Super-Benzin oder mit einem der oben genannten gasförmigen Treibstoffe gefahren werden.Currently are specially designed for the so-called dual fuel operation equipped. Here you can either use a liquid fuel such as gasoline or super gasoline or be driven with one of the above-mentioned gaseous fuels.

Sofern zur Aufbereitung des flüssigen Treibstoffes ein Vergaser verwendet wird, tritt speziell beim Gasbetrieb im oberen Drehzahlbereich ein Leistungsabfall auf.If a carburetor is used to process the liquid fuel there is a drop in performance, especially in gas operation in the upper speed range on.

In der VDI-Zeitschrift, Band 81, Nr. 47 vom 20. November 1937 veröffentlicht Prof. Rixmann einen Bericht, der betitelt ist: "Der Leistungsabfall gasbetriebener Fahrzeugmotoren und die Wege zu seiner Verminderung". In diesem Bericht weist Prof.Published in the VDI-Zeitschrift, Volume 81, No. 47 of November 20, 1937 Prof. Rixmann published a report entitled: "The drop in performance of gas-powered Vehicle engines and the ways to reduce them ". In this report, Prof.

Rixmann nach, daß der Leistungsabfall beim Gasbetrieb im oberen Drehzahlbereich kompensiert werden kann, ja, sogar bei bestimmten Anordnungen des Gesamtsystems zu einer Leistungssteigerung führt (s. beigefügter Bericht). Die von Prof. Rixmann beschriebenen Wege lassen sich bei derzeitigen, modernen Vergasern nicht mehr realisieren und führen zu einem erhöhten Bauaufwand.Rixmann found that the drop in performance in gas operation in the upper speed range can be compensated, yes, even with certain arrangements of the overall system leads to an increase in performance (see attached report). Prof. Rixmann's described Paths can be found with current, modern carburetors can no longer be realized and lead to increased construction costs.

In der Erfindung werden Wege beschrieben, wie die von Prof.The invention describes ways in which Prof.

Rixmann geforderten Bedingungen eines wirtschaftlichen Wirkungsgrades und eines hohen Liefergrades auch bei Verwendung eines Vergasers für den Flüssigkraftstoff-Betrieb erreicht werden können.Rixmann required conditions of economic efficiency and a high degree of delivery even when using a carburetor for liquid fuel operation can be achieved.

Es steht fest, daß die Drosselwirkung eines Vergasers, sei es durch den im Vergaser eingesetzten Lufttrichter, oder durch die Verwendung eines Schiebers (Stromberg-Vergaser) einen starken Einfluß auf den Liefergrad, das Mischungsverhältnis und den wirtschaftlichen Wirkungsgrad mit sich bringt.It is clear that the throttling effect of a carburetor, be it through the air funnel installed in the carburetor, or by using a slide (Stromberg carburetor) has a strong influence on the degree of delivery, the mixing ratio and brings economic efficiency with it.

In seiner Arbeit weist Prof. Rixmann darauf hin, daß für einen optimalen Gasbetrieb zusätzlich Luft zugeführt werden muß, um die Drosselwirkung des Lufttrichters, bzw. des Schiebers, zu reduzieren.In his work, Prof. Rixmann points out that for an optimal Gas operation, additional air must be supplied to reduce the throttling effect of the air funnel, or the slide to reduce.

Figur 1 zeigt einen Vergaser mit Lufttrichter und zusätzlicher Luftzuführung vor der Drosselklappe beim Gasbetrieb.Figure 1 shows a carburetor with an air funnel and additional air supply in front of the throttle valve in gas operation.

Figur 2 zeigt ein solches System, jedoch unter Verwendung eines Zwischenflansches.Figure 2 shows such a system, but using an intermediate flange.

Figur 3 zeigt eine Anordnung bei einem membrangesteuerten Schiebervergaser (Stromberg-Vergaser).Figure 3 shows an arrangement in a diaphragm-controlled slide carburetor (Stromberg carburetor).

Figur 1 Das Vergasergehäuse ist mit 1 bezeichnet. In diesem Vergasergehäuse ist der Lufttrichter 2 eingesetzt, welcher den Querschnitt des Vergasergehäuses 1 reduziert. An der engsten Stelle des Lufttrichters 2 endet der sogenannte Düsenstock 3. An dessen oberem Ende tritt beim Durchströmen der Luft durch den Vergaser Kraftstoff aus. Die engste Stelle zwischem dem Teil 3 und dem Teil 2 ist mit 4 bezeichnet. Hier tritt der stärkste Unterdruck auf.FIG. 1 The carburetor housing is denoted by 1. In this carburetor housing the air funnel 2 is inserted, which has the cross-section of the carburetor housing 1 reduced. At the narrowest point of the air funnel 2 ends so-called nozzle assembly 3. At its upper end occurs when the air flows through out of fuel through the carburetor. The narrowest point between part 3 and the Part 2 is labeled 4. This is where the strongest negative pressure occurs.

Die Drosselklappenwelle zur Regelung der Gemischzufuhr ist mit 5 bezeichnet, die Drosselklappe mit 6. Im Drosselklappenflansch 7 ist die Bohrung 8 angebracht. Diese Bohrung 8 wird über eine Verbindung 9 mit der Luftzuführung 11 vor dem Lufttrichter 2 verbunden.The throttle valve shaft for regulating the mixture supply is denoted by 5, the throttle valve with 6. The hole 8 is made in the throttle valve flange 7. This bore 8 is via a connection 9 with the air supply 11 in front of the air funnel 2 connected.

Mittels des Magnetventils 10 kann die Leitung 9 geöffnet oder geschlossen werden. Diese Bohrung 8 wird im Folgenden als Sekundärluft-Bohrung bezeichnet.The line 9 can be opened or closed by means of the solenoid valve 10 will. This bore 8 is referred to below as a secondary air bore.

Das Magnetventil 10 ist stromöffnend ausgebildet.The solenoid valve 10 is designed to open current.

Bei 12 tritt das Kraftstoff-Luftgemisch, in diesem Fall Flüssigkraftstoff + Luft, in Richtung Ansaugrohr aus.At 12, the fuel-air mixture occurs, in this case liquid fuel + Air, in the direction of the intake pipe.

Beim Flüssigkraftstoffbetrieb ist das Magnetventil 10 stromlos und somit geschlossen. Die Bohrung 8 ist damit abgesperrt, der Vergaser arbeitet ohne Sekundärluft über die Bohrung 8, die Flüssigkraftstoff-Gemischbildung wird nicht beeinflusst.During liquid fuel operation, the solenoid valve 10 is de-energized and thus closed. The bore 8 is blocked, the carburetor works without Secondary air through the hole 8, the liquid fuel mixture formation is not influenced.

Sofern im Gasbetrieb gefahren wird, ist das Magnetventil 10 erregt. Beim Öffnen der Drosselklappe 6 wird Luft durch die engste Stelle des Lufttrichters 2 (4) angesaugt, gleichzeitig strömt über die Leitung 9 und das Magnetventil 10 sowie die Bohrung 8 Sekundärluft nach dem Lufttrichter 2bei geöffneter Drosselklappe 6 in das Ansaugrohr. Der gasförmige Treibstoff wird direkt in das Ansaugrohr unter leichtem Überdruck zugeführt.If the drive is in gas mode, the solenoid valve 10 is energized. When the throttle valve 6 is opened, air is drawn through the narrowest part of the air funnel 2 (4) is sucked in, at the same time flows through the line 9 and the solenoid valve 10 as well as the hole 8 secondary air after the air funnel 2 with the throttle valve open 6 in the suction pipe. The gaseous fuel is taken directly into the intake pipe supplied with a slight overpressure.

Bedingt durch diese Anordnung, wird der Strömungswiderstand im Bereich 4 praktisch über die Leitung 9, das Magnetventil 10 und die Bohrung 8 reduziert.Due to this arrangement, the flow resistance is in the area 4 practically reduced via the line 9, the solenoid valve 10 and the bore 8.

Diese Anordnung führt dazu, daß beim Gasbetrieb der Leistungsabfall im oberen Drehzahlbereich auf jeden Fall reduziert wird.This arrangement leads to the fact that the performance drop in gas operation is definitely reduced in the upper speed range.

Figur 2 Figur 2 zeigt ein anderes System, welches zwischen das Vergasergehäuse 1 und den Drosselklappenflansch 13 eingeflanscht wird. Zu diesem Zweck ist zwischen 1 und 13 der u-förmig gestaltete Ring 14 festgeklemmt und gedichtet. Er befindet sich somit zwischen dem Lufttrichter 2 und der Drosselklappe 6. Aus diesem Teil 14 kann überl5 Zusatzluft austreten, sofern das Magnetventil 10 erregt ist. Diese Zusatzluft 18 wird zugeführt durch den Anschluß 16 über die konische Vergüngung 19 in den Raum 15.Figure 2 Figure 2 shows another system which is placed between the carburetor housing 1 and the throttle valve flange 13 is flanged. For this purpose is between 1 and 13, the U-shaped ring 14 clamped and sealed. He is located thus between the air funnel 2 and the throttle valve 6. From this part 14 can escape overl5 additional air if the solenoid valve 10 is energized. These Additional air 18 is supplied through the connection 16 via the conical enlargement 19 to room 15.

Auch hier wird bei geöffnetem Magnetventil der Effekt erzielt, daß hinter dem Lufttrichter 2 beim Gasbetrieb zusätzlich Luft zugeführt wird, wodurch die Drosselwirkung des Lufttrichters 2 abgebaut wird.Here too, when the solenoid valve is open, the effect is achieved that behind the air funnel 2 in gas operation, additional air is supplied, whereby the throttling effect of the air funnel 2 is reduced.

Figur 3 In das Vergasergehäuse 20 tritt durch die Bohrung 21 die Luft ein. Der Schieber 22 ist im Gehäuse 20 bei 23 geführt.FIG. 3 The air enters the carburetor housing 20 through the bore 21 a. The slide 22 is guided in the housing 20 at 23.

Bei Stillstand des Verbrennungsmotors befindet sich der Schieber 22 in tiefster Stellung. Mit steigender Drehzahl wird beim Flüssigbrennstoffbetrieb der Schieber 22 nach oben angehoben, wodurch die Düsennadel 24 bei 25 infolge ihres konischen Querschnitts immer mehr Flüssigkraftstoff austreten läßt.When the internal combustion engine is at a standstill, the slide 22 is located in the lowest position. With increasing speed, the liquid fuel operation the slide 22 is raised upwards, whereby the nozzle needle 24 at 25 as a result of her conical cross-section allows more and more liquid fuel to escape.

Diese Hubbewegung des Schiebers wird durch eine nicht skizzierte Unterdruckbohrung im Vergaser in den Raum 26 über der Rollmembran 27 zugeführt. Die Rollmembran 27 ist zwischen dem Dekkel 28 und dem Gehäuse 20 durch Klemmen befestigt. Die Verbindung mit dem Schieber 22 geschieht durch Schrauben 35 und dem Membranteller 29. Auf den Schieber 22 wirkt die Druckfeder 30.This stroke movement of the slide is caused by a vacuum hole (not shown) in the carburetor in the space 26 above the rolling diaphragm 27. The rolling diaphragm 27 is fixed between the cover 28 and the housing 20 by clamping. The connection with the slide 22 is done by screws 35 and the Membrane plate 29. The compression spring 30 acts on the slide 22.

Im Deckel 28 ist der Entlüftungsanschluß 31 eingeschraubt. An diesem Entlüftungsanschluß 31 ist das 3/2-Wege-Magnetventil 32 mittels des Schlauchs 33 angeschlossen. Der Anschluß des Magnetventils ist über den Schlauch 33 mit dem Ansaugrohr verbunden. Die Drosselklappenwelle ist mit 5, die Drosselklappe mit 6 bezeichnet.The vent connection 31 is screwed into the cover 28. At this The vent connection 31 is the 3/2-way solenoid valve 32 by means of the hose 33 connected. The connection of the solenoid valve is via the hose 33 with the suction pipe tied together. The throttle valve shaft is denoted by 5 and the throttle valve is denoted by 6.

Das Magnetventil 32 verbindet in erregtem Zustand das Saugrohr 34 mit dem Raum 26 über der Rollmembran 27. In stromlosem Zustand ist -der Raum 26 über der Rollmembran 27 über eine nicht skizzierte Drossel mit der Außenluft verbunden.The solenoid valve 32 connects the suction pipe 34 in the excited state with the space 26 above the rolling diaphragm 27. In the de-energized state, space 26 is Connected to the outside air via the rolling diaphragm 27 via a throttle (not shown).

Sofern der Motor gestartet wird, steht der Unterdruck des Saugrohrs 34 über das im Gasbetrieb erregte Magnetventil 32 und die Teile 33 am Raum 26 über der Rollmembran 27 an. Entgegen der Rückstellkraft der Feder 30 wird durch den Saugrohrunterdruck der Schieber 22 voll angehoben, so daß der Durchlassquerschnitt der Bohrung 21 voll geöffnet ist. Dadurch kann beim Gasbetrieb die maximal benötigte Luftmenge 1 zugeführt werden.As long as the engine is started, there is negative pressure in the intake manifold 34 via the solenoid valve 32, which is excited in gas operation, and the parts 33 in space 26 the rolling diaphragm 27. Counter to the restoring force of the spring 30 is caused by the intake manifold vacuum the slide 22 is fully raised, so that the passage cross section of the bore 21 is full is open. As a result, the maximum amount of air 1 required can be supplied in gas operation will.

Claims (1)

PATENTANSPRÜCHE Anspruch Vergaser für Flüssigtreibstoff, durch welchen beim Gasbetrieb die Verbrennungsluft zur Verbrennung des Gases oder das Gas-Luftgemisch durchgesaugt wird dadurch gekennzeichnet, daß der für den Gasbetrieb benötigte Durchlaßquerschnitt 4, er wird begrenzt durch den Lufttrichter 2 und den Düsenstock 3, unter V.erwendung von gesteuerten Elementen über einen Bypass zu 4 der Strömungswiderstand bei 4 verringert wird. PATENT CLAIMS claim carburetor for liquid fuel through which in gas operation, the combustion air to burn the gas or the gas-air mixture sucked through is characterized in that the passage cross-section required for gas operation 4, it is limited by the air funnel 2 and the nozzle holder 3, using V. of controlled elements via a bypass to 4, the flow resistance at 4 is reduced will. Anspruch 2 Vergaser für Flüssigtreibstoff nach Anspruch 1 dadurch gekennzeichnet, daß nach Figur 2 vor dem Lufttrichter eines Steigstrom-, Flachstrom- oder Fallstromvergasers mittels des Kanals 9 über das Magnetventil 10, stromöffnend, durch die Bohrung 8 zwischen Lufttrichter 2 und Drosselklappe 6 zugeführt werden kann, so daß zum Querschnitt 4 eine Parallelströmung über 9 erreicht wird, wodurch der Gesamt-Strömungswiderstand reduziert wird.Claim 2 carburetor for liquid fuel according to claim 1 thereby characterized that according to Figure 2 in front of the air funnel of an ascending flow, flat flow or downdraft carburetor by means of channel 9 via solenoid valve 10, current-opening, through the bore 8 between the air funnel 2 and the throttle valve 6 can, so that a parallel flow through 9 is achieved to the cross section 4, whereby the total flow resistance is reduced. Anspruch 3 Vergaser für Flüssigtreibstoff nach Anspruch 1 dadurch gekennzeichnet, daß nach Fig. 2 zwischen das Vergasergehäuse 1 und den Drosselklappenflansch 13 der Ring 14 geklemmt und gedichtet ist und über die absperrbare Bohrung 16 durch die konische Verjüngung 19 in den Raum 15 beim Gasbetrieb Sekundärluft zwischen Drosselklappe 6 und Lufttrichter 2 zugeführt werden kann.Claim 3 carburetor for liquid fuel according to claim 1 thereby characterized in that according to Fig. 2 between the carburetor housing 1 and the throttle valve flange 13 the ring 14 is clamped and sealed and through the lockable bore 16 the conical taper 19 in the space 15 secondary air between the gas operation Throttle valve 6 and air funnel 2 can be supplied. Anspruch 4 Vergaser für Flüssigtreibstoff nach Anspruch 1 dadurch gekennzeichnet, daß beim Gasbetrieb beim membrangesteuerten Schiebervergaser nach Fig. 3 über die absperrbare Leitung 33 der Unterdruck des Saugrohr 34 auf die Rollmembran 27 wirkt, so daß im gesamten Leerlauf-Teil- und Vollastbetrieb, bedingt durch den Unterdruck das Saugrohrs 34, der Schieber 22 die Bohrung 21 voll freigibt.Claim 4 carburetor for liquid fuel according to claim 1 thereby characterized that after gas operation with the diaphragm-controlled slide carburetor 3 shows the negative pressure of the suction pipe 34 on the rolling diaphragm via the lockable line 33 27 acts so that in the entire idle partial and full load operation, due to the Negative pressure in the suction pipe 34, the slide 22 fully exposes the bore 21.
DE19823205935 1982-02-19 1982-02-19 Secondary air feed Withdrawn DE3205935A1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672824A1 (en) * 1994-03-14 1995-09-20 Yamaha Hatsudoki Kabushiki Kaisha Gas-fuelled engine
US8512035B2 (en) 2010-03-09 2013-08-20 Honeywell Technologies Sarl Mixing device for a gas burner
US8668491B2 (en) 2009-10-06 2014-03-11 Honeywell Technologies Sarl Regulating device for gas burners
JP2014509717A (en) * 2011-04-01 2014-04-21 ハイドロジェン エナジー システムズ エルエルシー Mixing block

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672824A1 (en) * 1994-03-14 1995-09-20 Yamaha Hatsudoki Kabushiki Kaisha Gas-fuelled engine
US5755203A (en) * 1994-03-14 1998-05-26 Yamaha Hatsudoki Kabushiki Kaisha Charge-forming system for gaseous fueled engine
US8668491B2 (en) 2009-10-06 2014-03-11 Honeywell Technologies Sarl Regulating device for gas burners
US8512035B2 (en) 2010-03-09 2013-08-20 Honeywell Technologies Sarl Mixing device for a gas burner
JP2014509717A (en) * 2011-04-01 2014-04-21 ハイドロジェン エナジー システムズ エルエルシー Mixing block
EP2694793A4 (en) * 2011-04-01 2014-09-10 Hydrogen Energy Systems Llc Mixing block

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