EP0088136A1 - Regulating screw for a mixture formation device - Google Patents

Regulating screw for a mixture formation device Download PDF

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Publication number
EP0088136A1
EP0088136A1 EP82101729A EP82101729A EP0088136A1 EP 0088136 A1 EP0088136 A1 EP 0088136A1 EP 82101729 A EP82101729 A EP 82101729A EP 82101729 A EP82101729 A EP 82101729A EP 0088136 A1 EP0088136 A1 EP 0088136A1
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EP
European Patent Office
Prior art keywords
regulating
regulating screw
section
cone
fuel
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Granted
Application number
EP82101729A
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German (de)
French (fr)
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EP0088136B1 (en
Inventor
Bernd Findeisen
Otto Noelle
Hermann Strell
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Pierburg GmbH
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Pierburg GmbH
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Priority to DE8282101729T priority Critical patent/DE3261665D1/en
Priority to EP19820101729 priority patent/EP0088136B1/en
Publication of EP0088136A1 publication Critical patent/EP0088136A1/en
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Publication of EP0088136B1 publication Critical patent/EP0088136B1/en
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    • 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
    • F02M3/00—Idling devices for carburettors
    • F02M3/02—Preventing flow of idling fuel
    • F02M3/04—Preventing flow of idling fuel under conditions where engine is driven instead of driving, e.g. driven by vehicle running down hill
    • F02M3/05—Pneumatic or mechanical control, e.g. with speed regulation

Definitions

  • the invention relates to a regulating screw of a mixture generator for internal combustion engines for the cross-sectional determination of a throttle point in a flow channel for fuel, air or fuel-air mixture with a regulating cone, a thread and a key attachment.
  • Such regulating screws are required, for example, for the idle speed setting, which must be carried out taking into account the emission standards defined by the exhaust gas legislation, and for the readjustment, with the friction power changing with the running time of the engines, the idling speed.
  • a carburetor is known from the information leaflet of the Deutsche Vergaser Deutschen, Neuss, downdraft carburetor 31-34 PICT-5, pages 10 to 13, images 11 to 14, print 4/75, which is equipped with a so-called additional mixture system.
  • This additional mixture system allows the readjustment of the idling speed, which is necessary for running-in engines, to be possible with only one regulating screw, whereby the screw responsible for compliance with emissions standards remains sealed at the factory. This is possible because the two fuel supply systems are coordinated so that a so-called CO line is established when the mixture throughput is adjusted.
  • the object of the invention is therefore to equip a carburetor with a device with which the errors mentioned can be avoided.
  • the carburetor is equipped with a regulating screw, in which the regulating cone is arranged between outlet openings of a flow channel axially penetrating the regulating cone, which cooperates as a throttle point with a closure body, which with a chamber in the key approach against a chamber in a lid sealing membrane is connected and the throttle cross section is adjusted at a corresponding pressure difference between the chambers against the force of a spring, the spring for the use of the regulating screw in certain engine-related tasks being arranged to act on the closure body or to open the spring on the Locking body is arranged to act and the lid has an atmosphere connection or has a control line connection.
  • the advantages that can be achieved by the invention result from the possibility of using the regulating screw for various engine technology tasks, which can be achieved in particular with a carburetor with an additional mixture system. It is the idle speed control dependent on the idling system pressure or the intake pressure of the internal combustion engine, a boost increase in the fuel mixture delivery for better combustion and thus a reduction in the pollutant content in the exhaust gas, while pursuing the philosophy of fuel economy cut-off, a better load acceptance in the transition from idle to load operation by additional mixture delivery and one Low-force adjustment due to the division of the cross-section into fixed and variable components, whereby a low-hysteresis and precise adjustment is achieved.
  • Another advantage is likely to be the retrofit and the cheaper carburetor, by eliminating the usual additional equipment such as valves, throttle valve actuators, etc.
  • Embodiments of the invention are shown schematically in the drawing and are described below.
  • Fig. 1 of the drawing shows a known carburetor 1 in partial section with an additional mixture system for providing the fuel mixture required for idling operation, which is equipped with all the systems necessary for proper operation, even if they are not shown, with a throttle valve 3 downstream of one Main mixture outlet 2 arranged in an intake duct 4 and a channel 5 bypassing the throttle valve 3 with a fuel emulsion inlet 6, a throttle point 7 which interacts with a regulating cone 8 of a regulating screw 9 and a second fuel emulsion inlet 10 arranged downstream of the throttle point 7, which is controlled by an idling mixture regulating screw 11.
  • An outlet section 12 of the channel 5 forms a valve seat 13, which optionally interacts with an electromagnetic valve cone 14 for the anti-diesel shutdown.
  • Fig. 2 shows a regulating screw 9 in the version as it is required for example for idle speed control.
  • the regulating screw 9 consists of a screw body 16 with the regulating cone 8, a thread 15 and a key attachment 17.
  • the regulating cone 8 has a flow channel 18 arranged in the adjustment direction, which acts as a throttle point 19 between the outlet 20 on the slim part of the regulating cone 8 and a part 21 of the flow channel 18, which exits through transverse openings 22 in the thick part of the regulating cone 8, acts.
  • the continuation of the flow channel 18, 21 forms a guide 23 for a valve rod 24, which is connected by means of two diaphragm plates 25, 26 to a diaphragm 27 and at its other end has a receiving groove 28 for a soft material ring 29, which acts as a closure body 30 with the throttle point 19 cooperates, the membrane responding to the difference in pressures in the atmosphere and in the additional mixture system upstream of the throttle points 7, 19.
  • the membrane 27 is held in a recess 32 of a chamber 33 in the region of the key extension 17 by means of a cover 31, the chamber 33 having a shoulder 34 for receiving a spring 35 and being connected to the guide 23.
  • the spring 35 is supported with its other end under tension on the membrane plate 25 and loads the valve stem 24 in the opening direction.
  • the cover 31 has a chamber 36 which is connected to the atmosphere via a connection 37.
  • Fig. 3 shows a regulating screw for the same application, but the diaphragm 27 to the difference in the pressures in the intake line of the internal combustion engine downstream of the mixture generator 1, via a control line connection 38 of the diaphragm 27, and responds in the additional mixture system in front of the throttling points 7, 19 .
  • the spring 35 is supported in the opening 31, the spring 35 is supported in the cover 31 and the closure body 30 is arranged in the flow direction behind the throttle point 19 in accordance with the above-mentioned action — the spring 35 loads the valve rod 24 in the opening direction.
  • An embodiment of the regulating screw as would be provided for a thrust increase, would consist of the combination of the two embodiments shown, i. H. the closure body 30 is arranged as in FIG. 2 and the spring 35 is arranged as shown in FIG. 3.
  • the regulating screw is screwed into the normal position for the setting of the carburetor 1 with the throttle point 19 closed, as prescribed.
  • a pressure difference on the diaphragm 27 becomes effective by a corresponding pressurization of the diaphragm 27, so that the closure body 30 changes the cross section of the throttle point 19 as a function thereof, so that an additional cross section is released for that determined by the positioning of the screw or is closed.

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  • 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)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

1. A regulating screw for a mixture-forming device for internal combustion engines, for controlling the open cross-section of a constricted orifice in a channel through which flows a stream of fuel, air or fuel-air mixture, the regulating screw having a regulating cone for setting a fixed open cross-section, a screw thread and an adjustment head, characterised in that the regulating cone (8) is situated between apertures (20 and 22) of an internal channel (18) which penetrates axially through the regulating cone (8), the internal channel (18) having a constricted passage (19) whose open cross-section is controlled by a flow-adjustor (30) connected to a diaphragm (27) which is retained by a cap (31) in an adjustment head (17), the diaphragm (27) separating a chamber (33) in the adjustment head (17) from a chamber (36) under the cap (31), the diaphragm (27) responding, against the influence of a spring (35), to a pressure difference in the chambers (33, 36) by varying the open cross-section of the constricted passage (19).

Description

Die Erfindung betrifft eine Regulierschraube eines Gemischbildners für Brennkraftmaschinen für die Querschnittsbestimmung einer Drosselstelle in einem Strömungskanal für Brennstoff, Luft oder Brennstoff-Luft-Gemisch mit einem Regulierkonus, einem Gewinde und einem Schlüsselansatz.The invention relates to a regulating screw of a mixture generator for internal combustion engines for the cross-sectional determination of a throttle point in a flow channel for fuel, air or fuel-air mixture with a regulating cone, a thread and a key attachment.

Derartige Regulierschrauben werden beispielsweise für die Leerlaufeinstellung, die unter Berücksichtigung der durch die Abgasgesetzgebung festgelegten Emissionsnormen vorgenommen werden muß, und für die Nachregulierung, bei veränderter Reibleistung mit der Laufzeit der Motoren, der Leerlaufdrehzahl benötigt.Such regulating screws are required, for example, for the idle speed setting, which must be carried out taking into account the emission standards defined by the exhaust gas legislation, and for the readjustment, with the friction power changing with the running time of the engines, the idling speed.

Aus der Informationsschrift der Deutschen Vergaser Gesellschaft, Neuss, Fallstromvergaser 31-34 PICT-5, Seite 10 bis 13, Bild 11 bis 14, Druck 4/75, ist ein Vergaser bekannt, der mit einem sogenannten Zusatzgemischsystem ausgestattet ist. Dieses Zusatzgemischsystem erlaubt es, daß die Nachregulierung der Leerlaufdrehzahl, die bei eingelaufenen Motoren notwendig wird, mit nur einer Regulierschraube möglich ist, wobei die für die Emissionsnormen-Einhaltung verantwortliche Schraube werkseitig verplomt bleibt. Dies ist möglich, da die beiden brennstoffzuführenden Systeme so abgestimmt sind, daß sich eine sogenannte CO-Gerade bei einer Verstellung des Gemischdurchsatzes einstellt. Bei Einsatz eines Motors in einem Kraftfahrzeug treten oft in bestimmten Betriebsphasen Fehler auf, beispielsweise Drehzahleinbruch nach Schub und Bremsen, erhöhter Schadstoffausstoß im Schub, Leerlaufdrehzahlschwankungen etc., die als Schub- bzw. Leerlaufprobleme bekannt sind und zu deren Beseitigung diverse Vorschläge gemacht wurden. Hierfür ist aus der DE-PS 19 61 438 eine Drehzahlsteuereinrichtung und aus dem DE-GM 70 39 342 eine Zusatzgemischleitung eines Vergasers bekannt, wobei letztere einen Durchgangsquerschnitt aufweist, der selbsttätig mit steigendem Saugrohrdruck vergrößert und mit fallendem verkleinert wird, wodurch eine konstante Leerlaufdrehzahl unabhängig von wechselnden Belastungen des Motors durch Zusatzaggregate (Automatikgetriebe, Klimaanlage, Servolenkung usw.) erreicht werden soll. Diese Einrichtungen als Zusatzeinrichtungen sind teuer und in ihrer Wirkung unbefriedigend, da sie für die Steuerung des gesamten Querschnitts ausgelegt sind, wodurch eine Verstellung im ungünstigen Bereich Verstellweg zur Flächenänderung bedingt ist, hohe Verstellkräfte benötigt werden und eine große Hysterese im Ansprechverhalten vorhanden ist.A carburetor is known from the information leaflet of the Deutsche Vergaser Gesellschaft, Neuss, downdraft carburetor 31-34 PICT-5, pages 10 to 13, images 11 to 14, print 4/75, which is equipped with a so-called additional mixture system. This additional mixture system allows the readjustment of the idling speed, which is necessary for running-in engines, to be possible with only one regulating screw, whereby the screw responsible for compliance with emissions standards remains sealed at the factory. This is possible because the two fuel supply systems are coordinated so that a so-called CO line is established when the mixture throughput is adjusted. When using an engine in a motor vehicle, errors often occur in certain operating phases, such as a drop in engine speed after coasting and braking, increased pollutant emissions during coasting, idling speed fluctuations, etc., which are known as thrust or idling problems and various proposals have been made to remedy them. For this is from DE-PS 19 61 438 a speed control device and from DE-GM 70 39 342 an additional mixture known line of a carburetor, the latter having a passage cross section, which is automatically increased with increasing intake manifold pressure and decreased with falling, whereby a constant idling speed regardless of changing loads on the engine by additional units (automatic transmission, air conditioning, power steering, etc.) is to be achieved. These devices as additional devices are expensive and their effect is unsatisfactory, since they are designed for the control of the entire cross-section, which means that an adjustment in the unfavorable range requires an adjustment path to change the area, high adjustment forces are required and there is a large hysteresis in the response behavior.

Aufgabe der Erfindung ist es daher einen Vergaser mit einer Vorrichtung auszustatten, mit der die genannten Fehler vermieden werden können.The object of the invention is therefore to equip a carburetor with a device with which the errors mentioned can be avoided.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Vergaser mit einer Regulierschraube ausgestattet ist, bei der der Regulierkonus zwischen Austrittsöffnungen eines den Regulierkonus axial durchdringenden Strömungskanals angeordnet ist, der als Drosselstelle mit einem Verschlußkörper zusammenwirkt, der mit einer eine Kammer im Schlüsselansatz gegen eine Kammer in einem Deckel abdichtenden Membrane verbunden ist und bei einer entsprechenden Druckdifferenz zwischen den Kammern gegen die Kraft einer Feder den Drosselquerschnitt bestimmend verstellt wird, wobei für den Einsatz der Regulierschraube bei bestimmten motortechnischen Aufgaben die Feder schließend auf den Verschlußkörper einwirkend angeordnet ist oder die Feder öffnend auf den Verschlußkörper einwirkend angeordnet ist und der Deckel einen Atmosphärenanschluß aufweist oder einen Steuerleitungsanschluß aufweist.This object is achieved in that the carburetor is equipped with a regulating screw, in which the regulating cone is arranged between outlet openings of a flow channel axially penetrating the regulating cone, which cooperates as a throttle point with a closure body, which with a chamber in the key approach against a chamber in a lid sealing membrane is connected and the throttle cross section is adjusted at a corresponding pressure difference between the chambers against the force of a spring, the spring for the use of the regulating screw in certain engine-related tasks being arranged to act on the closure body or to open the spring on the Locking body is arranged to act and the lid has an atmosphere connection or has a control line connection.

Die durch die Erfindung erzielbaren Vorteile ergeben sich aus der Einsatzmöglichkeit der Regulierschraube für diverse Aufgaben der Motortechnik, die insbesondere mit einem Vergaser mit einem Zusatzgemischsystem gelöst werden können. Es ist die Leerlaufdrehzahlregelung abhängig vom Leerlaufsystemdruck oder vom Ansaugdruck der Brennkraftmaschine, eine Schubanhebung der Brenngemischförderung für eine bessere Verbrennung und damit Verringerung des Schadstoffgehaltes im Abgas, bei Verfolgung der Philosophie Schubabschaltung Brennstoffeinsparung, eine bessere Lastannahme im übergang vom Leerlauf- zum Lastbetrieb durch Zusatzgemischförderung und eine durch die Aufteilung des Querschnitts in feste und variable Anteile bedingte kraftarme Verstellung, wodurch eine hysteresearme und genaue Verstellung erreicht wird. Ein weiterer Vorteil dürfte durch die Nachrüstbarkeit und durch die Verbilligung des Vergasers, durch Wegfall von bisher üblichen Zusatzeinrichtungen, wie Ventilen, Drosselklappenanstellern usw., gegeben sein.The advantages that can be achieved by the invention result from the possibility of using the regulating screw for various engine technology tasks, which can be achieved in particular with a carburetor with an additional mixture system. It is the idle speed control dependent on the idling system pressure or the intake pressure of the internal combustion engine, a boost increase in the fuel mixture delivery for better combustion and thus a reduction in the pollutant content in the exhaust gas, while pursuing the philosophy of fuel economy cut-off, a better load acceptance in the transition from idle to load operation by additional mixture delivery and one Low-force adjustment due to the division of the cross-section into fixed and variable components, whereby a low-hysteresis and precise adjustment is achieved. Another advantage is likely to be the retrofit and the cheaper carburetor, by eliminating the usual additional equipment such as valves, throttle valve actuators, etc.

Ausführungsbeispiele der Erfindung sind in der Zeichnung schematisch dargestellt und werden im folgenden beschrieben.Embodiments of the invention are shown schematically in the drawing and are described below.

Es zeigen:

  • Fig. 1 einen Vergaser mit einem Zusatzgemischsystem und einer erfindungsgemäßen Regulierschraube,
  • Fig. 2 ein Ausführungsbeispiel einer Regulierschraube,
  • Fig. 3 ein weiteres Ausführungsbeispiel der Regulierschraube.
Show it:
  • 1 shows a carburetor with an additional mixture system and a regulating screw according to the invention,
  • 2 shows an embodiment of a regulating screw,
  • Fig. 3 shows another embodiment of the regulating screw.

Fig. 1 der Zeichnung zeigt einen bekannten Vergaser 1 im Teilschnitt mit einem Zusatzgemischsystem für die Bereitstellung des für den Leerlaufbetrieb notwendigen Brenngemischs, der mit allen für einen ordentlichen Betrieb notwendigen Systemen ausgestattet ist, auch wenn sie nicht dargestellt sind, mit einer Drosselklappe 3 stromab eines Hauptgemischaustritts 2 in einem Ansaugkanal 4 angeordnet und einen die Drosselklappe 3 umgehenden Kanal 5 mit einem Brennstoffemulsionseintritt 6, einer Drosselstelle 7, die mit einem Regulierkonus 8 einer Regulierschraube 9 zusammenwirkt und einem zweiten Brennstoffemulsionseintritt 10 stromab der Drosselstelle 7 angeordnet, der von einer Leerlaufgemischregulierschraube 11 kontrolliert wird. Ein Austrittsabschnitt 12 des Kanals 5 bildet einen Ventilsitz 13, der ggfs. mit einem Elektromagnetventilkonus 14 für die Antidieselabschaltung zusammenwirkt.Fig. 1 of the drawing shows a known carburetor 1 in partial section with an additional mixture system for providing the fuel mixture required for idling operation, which is equipped with all the systems necessary for proper operation, even if they are not shown, with a throttle valve 3 downstream of one Main mixture outlet 2 arranged in an intake duct 4 and a channel 5 bypassing the throttle valve 3 with a fuel emulsion inlet 6, a throttle point 7 which interacts with a regulating cone 8 of a regulating screw 9 and a second fuel emulsion inlet 10 arranged downstream of the throttle point 7, which is controlled by an idling mixture regulating screw 11. An outlet section 12 of the channel 5 forms a valve seat 13, which optionally interacts with an electromagnetic valve cone 14 for the anti-diesel shutdown.

Fig. 2 zeigt eine Regulierschraube 9 in der Ausführung, wie sie beispielsweise für die Leerlaufdrehzahlregelung benötigt wird. Die Regulierschraube 9 besteht aus einem Schraubenkörper 16 mit dem Regulierkonus 8,einem Gewinde 15 und einem Schlüsselansatz 17. Der Regulierkonus 8 weist einen in Verstellrichtung angeordneten Strömungskanal 18 auf, der als Drosselstelle 19 zwischen dem Austritt 20 am schlanken Teil des Regulierkonusses 8 und einem Teil 21 des Strömungskanals 18, der durch Queröffnungen 22 am dicken Teil des Regulierkonusses 8 austritt, wirkt. Die Fortsetzung des Strömungskanals 18, 21 bildet eine Führung 23 für eine Ventilstange 24, die mittels zweier Membranteller 25, 26 mit einer Membrane 27 verbunden ist und an ihrem anderen Ende eine Aufnahmenut 28 für einen Weichstoffring 29 aufweist, der als Verschlußkörper 30 mit der Drosselstelle 19 zusammenwirkt, wobei die Membrane auf die Differenz der Drücke in der Atmosphäre und im Zusatzgemischsystem vor den Drosselstellen 7, 19 anspricht.Fig. 2 shows a regulating screw 9 in the version as it is required for example for idle speed control. The regulating screw 9 consists of a screw body 16 with the regulating cone 8, a thread 15 and a key attachment 17. The regulating cone 8 has a flow channel 18 arranged in the adjustment direction, which acts as a throttle point 19 between the outlet 20 on the slim part of the regulating cone 8 and a part 21 of the flow channel 18, which exits through transverse openings 22 in the thick part of the regulating cone 8, acts. The continuation of the flow channel 18, 21 forms a guide 23 for a valve rod 24, which is connected by means of two diaphragm plates 25, 26 to a diaphragm 27 and at its other end has a receiving groove 28 for a soft material ring 29, which acts as a closure body 30 with the throttle point 19 cooperates, the membrane responding to the difference in pressures in the atmosphere and in the additional mixture system upstream of the throttle points 7, 19.

Die Membrane 27 ist mittels eines Deckels 31 in einer Ausnehmung 32 einer Kammer 33 im Bereich des Schlüsselansatzes 17 gehalten, wobei die Kammer 33 einen Absatz 34 für die Aufnahme einer Feder 35 aufweist und mit der Führung 23 verbunden ist. Die Feder 35 stützt sich mit ihrem anderen Ende unter Spannung an dem Membranteller 25 ab und belastet die Ventilstange 24 in öffnungsrichtung. Der Deckel 31 weist eine Kammer 36 auf, die mit der Atmosphäre über einen Anschluß 37 verbunden ist.The membrane 27 is held in a recess 32 of a chamber 33 in the region of the key extension 17 by means of a cover 31, the chamber 33 having a shoulder 34 for receiving a spring 35 and being connected to the guide 23. The spring 35 is supported with its other end under tension on the membrane plate 25 and loads the valve stem 24 in the opening direction. The cover 31 has a chamber 36 which is connected to the atmosphere via a connection 37.

Fig. 3 zeigt eine Regulierschraube für den gleichen Anwendungsfall, wobei jedoch die Membrane 27 auf die Differenz der Drücke in der Ansaugleitung der Brennkraftmaschine stromab des Gemischbildners 1, über einen Steuerleitungsanschluß 38 der Membrane 27 zugeleitet,und im Zusatzgemischsystem vor den Drosselstellen 7, 19 anspricht. Hierbei ist entsprechend der genannten Wirkung -die Feder 35 belastet die Ventilstange 24 in öffnungsrichtung- die Feder 35 im Deckel 31 abgestützt und der Verschlußkörper 30 in Strömungsrichtung hinter der Drosselstelle 19 angeordnet.Fig. 3 shows a regulating screw for the same application, but the diaphragm 27 to the difference in the pressures in the intake line of the internal combustion engine downstream of the mixture generator 1, via a control line connection 38 of the diaphragm 27, and responds in the additional mixture system in front of the throttling points 7, 19 . In this case, the spring 35 is supported in the opening 31, the spring 35 is supported in the cover 31 and the closure body 30 is arranged in the flow direction behind the throttle point 19 in accordance with the above-mentioned action — the spring 35 loads the valve rod 24 in the opening direction.

Eine Ausführung der Regulierschraube, wie sie für eine Schubanhebung vorzusehen wäre, würde aus der Kombination der beiden gezeigten Ausführungen bestehen, d. h. der Verschlußkörper 30 ist angeordnet wie in Fig. 2 und die Feder 35 ist angeordnet wie in Fig. 3 gezeigt.An embodiment of the regulating screw, as would be provided for a thrust increase, would consist of the combination of the two embodiments shown, i. H. the closure body 30 is arranged as in FIG. 2 and the spring 35 is arranged as shown in FIG. 3.

Funktionfunction

Die Regulierschraube wird für die Einstellung des Vergasers 1 mit geschlossener Drosselstelle 19 in die normale Position geschraubt, wie es vorgegeben ist. Bei Betrieb des Motors wird je nach Einsatzart durch eine entsprechende Druckbeaufschlagung der Membrane 27 eine Druckdifferenz an der Membrane 27 wirksam, so daß der Verschlußkörper 30 den Querschnitt der Drosselstelle 19 davon abhängig verändert, so daß ein zusätzlicher Querschnitt zum durch die Positionierung der Schraube festgelegten freigegeben oder verschlossen wird. Hierbei ist der Einsatz der Regulierschraube 9 für andere Anwendungsfälle, z. B. der Steuerung von Korrekturluft, Zusatzbrennstoff u.a. ebenfalls vorgesehen.The regulating screw is screwed into the normal position for the setting of the carburetor 1 with the throttle point 19 closed, as prescribed. During operation of the engine, depending on the type of application, a pressure difference on the diaphragm 27 becomes effective by a corresponding pressurization of the diaphragm 27, so that the closure body 30 changes the cross section of the throttle point 19 as a function thereof, so that an additional cross section is released for that determined by the positioning of the screw or is closed. Here, the use of the regulating screw 9 for other applications, eg. B. the control of correction air, additional fuel etc. also provided.

Claims (5)

1. Regulierschraube eines Gemischbildners für Brennkraftmaschinen für die Querschnittsbestimmung einer Drosselstelle in einem Strömungskanal für Brennstoff, Luft oder Brennstoff-Luft-Gemisch mit einem Regulierkonus, einem Gewinde und einem Schlüsselansatz, dadurch gekennzeichnet, daß der Regulierkonus (8) zwischen Austrittsöffnungen (20,22) eines den Regulierkonus (8) axial durchdringenden Strömungskanals (18) angeordnet ist, der als Drosselstelle (19) mit einem Verschlußkörper (30) zusammenwirkt, der mit einer eine Kammer (33) im Schlüsselansatz (17) gegen eine Kammer (36) in einem Deckel (31) abdichtenden Membrane (27) verbunden ist und bei einer entsprechenden Druckdifferenz zwischen den Kammern (33,36) gegen die Kraft einer Feder (35) den Drosselquerschnitt bestimmend verstellt wird.1. regulating screw of a mixture generator for internal combustion engines for the cross-sectional determination of a throttle point in a flow channel for fuel, air or fuel-air mixture with a regulating cone, a thread and a key attachment, characterized in that the regulating cone (8) between outlet openings (20, 22 ) of the regulating cone (8) axially penetrating flow channel (18) is arranged, which cooperates as a throttle point (19) with a closure body (30) which with a chamber (33) in the key extension (17) against a chamber (36) in a cover (31) sealing membrane (27) is connected and at a corresponding pressure difference between the chambers (33,36) against the force of a spring (35) is adjusted determining the throttle cross section. 2. Regulierschraube nach Anspruch 1, dadurch gekennzeichnet, daß die Feder (35) schließend auf den Verschlußkörper (30) einwirkend angeordnet ist.2. Regulating screw according to claim 1, characterized in that the spring (35) is arranged to act on the closure body (30). 3. Regulierschraube nach Anspruch 1, dadurch gekennzeichnet, daß die Feder (35) öffnend auf den Verschlußkörper (30) einwirkend angeordnet ist.3. regulating screw according to claim 1, characterized in that the spring (35) is arranged opening to act on the closure body (30). 4. Regulierschraube nach Anspruch 1, dadurch gekennzeichnet, daß der Deckel (31) einen Atmosphärenanschluß (37) aufweist.4. regulating screw according to claim 1, characterized in that the cover (31) has an atmosphere connection (37). 5. Regulierschraube nach Anspruch 1, dadurch gekennzeichnet, daß der Deckel (31) einen Steuerleitungsanschluß (38) aufweist.5. regulating screw according to claim 1, characterized in that the cover (31) has a control line connection (38).
EP19820101729 1982-03-05 1982-03-05 Regulating screw for a mixture formation device Expired EP0088136B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8282101729T DE3261665D1 (en) 1982-03-05 1982-03-05 Regulating screw for a mixture formation device
EP19820101729 EP0088136B1 (en) 1982-03-05 1982-03-05 Regulating screw for a mixture formation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19820101729 EP0088136B1 (en) 1982-03-05 1982-03-05 Regulating screw for a mixture formation device

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EP0088136A1 true EP0088136A1 (en) 1983-09-14
EP0088136B1 EP0088136B1 (en) 1984-12-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5693263A (en) * 1995-04-26 1997-12-02 Cominco Engineering Services Ltd. Sparger for producing gas bubbles in a liquid

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1047341A (en) * 1951-12-28 1953-12-14 Improvement in carburetor systems
FR1367671A (en) * 1963-06-12 1964-07-24 Improvements to idle speed adjustment devices for internal combustion engines with carburettors
FR1405209A (en) * 1962-03-03 1965-07-09 Device eliminating the supply of fuel to heat engines, when they are in controlled deceleration, or driven
DE2008883A1 (en) * 1969-03-03 1970-09-10 Societe Industrielle de Brevets et d'Etudes S.I.B.E., Neuilly-sur-Seine, (Frankreich) Carburetors for internal combustion engines
DE2639069A1 (en) * 1975-09-05 1977-03-17 Billat Georges FUEL FLOW REGULATING DEVICE
FR2334831A1 (en) * 1975-10-14 1977-07-08 Albert Mazoin Slow running jet for automobile engine - has spring loaded needle valve to economise fuel during acceleration
DE2924084A1 (en) * 1979-06-15 1980-12-18 Arwit Greis Slow running valve for IC engine carburettor - has spring loaded piston to give intermittent flow to economise fuel

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1047341A (en) * 1951-12-28 1953-12-14 Improvement in carburetor systems
FR1405209A (en) * 1962-03-03 1965-07-09 Device eliminating the supply of fuel to heat engines, when they are in controlled deceleration, or driven
FR1367671A (en) * 1963-06-12 1964-07-24 Improvements to idle speed adjustment devices for internal combustion engines with carburettors
DE2008883A1 (en) * 1969-03-03 1970-09-10 Societe Industrielle de Brevets et d'Etudes S.I.B.E., Neuilly-sur-Seine, (Frankreich) Carburetors for internal combustion engines
DE2639069A1 (en) * 1975-09-05 1977-03-17 Billat Georges FUEL FLOW REGULATING DEVICE
FR2334831A1 (en) * 1975-10-14 1977-07-08 Albert Mazoin Slow running jet for automobile engine - has spring loaded needle valve to economise fuel during acceleration
DE2924084A1 (en) * 1979-06-15 1980-12-18 Arwit Greis Slow running valve for IC engine carburettor - has spring loaded piston to give intermittent flow to economise fuel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5693263A (en) * 1995-04-26 1997-12-02 Cominco Engineering Services Ltd. Sparger for producing gas bubbles in a liquid

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DE3261665D1 (en) 1985-02-07

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