EP0781910A1 - Gas operating device for mounting on soil densification machine used internal combustion engines with membrane carburettor - Google Patents

Gas operating device for mounting on soil densification machine used internal combustion engines with membrane carburettor Download PDF

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Publication number
EP0781910A1
EP0781910A1 EP96120893A EP96120893A EP0781910A1 EP 0781910 A1 EP0781910 A1 EP 0781910A1 EP 96120893 A EP96120893 A EP 96120893A EP 96120893 A EP96120893 A EP 96120893A EP 0781910 A1 EP0781910 A1 EP 0781910A1
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EP
European Patent Office
Prior art keywords
actuator
valve
shut
carburetor
stop position
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Granted
Application number
EP96120893A
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German (de)
French (fr)
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EP0781910B1 (en
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Wacker Werke GmbH and Co KG
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Wacker Werke GmbH and Co KG
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    • 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
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/02—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for hand-held tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/04—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by mechanical control linkages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/04—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling rendering engines inoperative or idling, e.g. caused by abnormal conditions
    • 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
    • F02M17/00—Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
    • F02M17/02—Floatless carburettors
    • F02M17/04—Floatless carburettors having fuel inlet valve controlled by diaphragm
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • 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
    • Y10S123/00—Internal-combustion engines
    • Y10S123/11—Antidieseling

Definitions

  • the invention relates to a gas actuation device for attachment to soil compaction equipment, a membrane carburetor and a lockable connection between a fuel tank and the carburetor internal combustion engines having an actuator that can be used to change the carburetor position in several switching positions, from full load to idling in a switching position stopping the engine and back, is movable.
  • float carburettors are not suitable for applications where they are exposed to inclinations and / or strong vibrations, because this creates the risk of flooding or the carburetors are exposed to heavy wear. Soil compacting devices are often exposed to such operating situations, which is why their engines are preferably equipped with membrane carburettors.
  • Membrane carburettors of the simple series which only have one membrane for fuel control, but also carburettors with an additional second membrane for fuel delivery are much more suitable for vibration machines, however, due to the strong vibrations, but also due to wear and contamination, it cannot be assumed with certainty that these carburetors are absolutely reliably sealed after the engines are stopped.
  • shut-off device located in the line connection between the mostly higher fuel tank and the carburetor is reliably closed after the engine is stopped. Otherwise there is a risk that the motor will be flooded, e.g. in hanging engines, that the gasoline-oil mixture runs into the cylinder head, or that in the case of standing engines, the mixture flows into the crankcase of the engine.
  • the invention has for its object to provide a gas actuation device of the type described in such a way that after the engine has been stopped, the interruption of the line connection between the fuel tank and the carburetor is reliably ensured, regardless of whether the operator of the device is in need of stopping the engine is aware that the fuel tap or the respective shut-off device in the fuel line must be moved into the locked position.
  • a blocking position is arranged in the movement path of the actuator between the idle position and the stop position and is designed such that the line connection between the fuel tank and the carburetor is interrupted when passing the blocking position from the idling position to the stop position and when passing the blocking position this line connection is opened again in the opposite direction.
  • the operator only has to actuate a single control element for motor control, the individual switch positions of the control element having a logical sequence.
  • the actuator can be switched from full throttle to idle and the motor output can be increased again at any time by moving the actuator in opposite directions. If the engine is to be stopped, the movement of the actuator continues from the full throttle position to the idle position in the same direction, ie the idle position is left in the direction of the stop position. This movement initially leads to a position in which the shut-off device in the fuel line is brought into the closed position, as a result of which the engine comes to a standstill when the amount of fuel on the carburetor side of the shut-off device has been used up.
  • a short-circuit button which can be actuated by this is arranged in the movement path of the actuator.
  • a switch for switching off the interrupter line is provided instead of a short-circuit button. Since the actuator has to be transferred from the stop position to a position assigned to engine operation for the engine start, the short circuit is thus also canceled or the interrupter line is switched on again, the shut-off device is opened again and the line connection between the fuel tank and the carburetor is restored.
  • An advantageous embodiment consists in a gas actuating device with a mechanically actuated shut-off valve arranged in the line connection between the fuel tank and the carburetor, in that a mechanical actuating connection suitable for actuating the shut-off valve between the actuating element and the shut-off valve comprises a first actuator connected to the shut-off valve, which via a control cam is adjustably connected to a second actuator belonging to the actuator, according to an advantageous development the first actuator being biased into its position assigned to the open position of the shut-off valve is and under the effect of this bias in the path of the second actuator that it is pressed by this second actuator against the action of the bias in its associated position of the shut-off valve, as long as the actuator in a following the idle position and up to the stop position, including this, leading, blocking path section.
  • the actuator comprises a pivot lever which has a control cam on which the first actuator bears in an approximately radial direction with respect to the lever axis under the action of the pretension.
  • first actuator rests under the action of the bias against a stop limiting its movement and that the second actuator is assigned to the first actuator in such a way that there is an operative connection between the two actuators as long as the actuator is in its blocking path section located.
  • DD 80589 shows and describes a fuel switching device for carburetors of internal combustion engines, which in such a carburetor switches off the idling device after switching off the ignition or in overrun mode, the switching off being carried out by means of an electromagnetic valve.
  • a soil compactor 10 which is only represented by a tubular section of its frame, is operated by an internal combustion engine for gasoline fuel, of which a part of the gasifier 12 can be seen in FIG. 2, the throttle valve of which can be actuated by a lever 14.
  • a bowden cable 16 acts on the lever 14, the other end of which is connected to an adjusting lever 22 which can be pivoted about an axis 20 (FIG. 1) and together with this forms an adjusting element 18 for controlling the motor.
  • Fig. 1 this is provided with a handle 24 (Fig.3) adjusting lever 22 in its one end position, the full load position D, from which it in Fig.
  • the lever 14 is provided with an eccentric cam 26 which actuates a short-circuit button 28 when the stop position is reached and thereby immediately stops the motor.
  • Fig. 2 denotes the starting device for the engine.
  • a fuel line 32 leads from a fuel tank 30 (FIG. 3) to a shut-off valve 34 and from its outlet 36 to the carburetor 12.
  • the shut-off valve 34 contains a valve slide 40, which is biased into the open position by a spring 39 and which emerges from the valve housing 42 in one protrudes in the radial direction with respect to the axis 20 and to which a control cam 44 is assigned on the actuating lever 22.
  • This control curve 44 has a cam-like elevation 46, which is suitable for pushing the valve slide 40 into its blocking position against the action of the valve spring 39 when the actuating lever 24 reaches position B starting from position C. In the locked position of the valve slide 40, the supply of the carburetor 12 from the fuel tank 30 is completely interrupted.

Abstract

The internal combustion engine has a membrane carburettor to provide controlled operation despite vibrations. The single control lever (18) regulates the engine speed between full throttle (D) and idling (C). To stop the engine the control is moved to past the idling setting to a stop position (A). To reach the stop position the control passes a position (B) at which the fuel feed is completely shut off. The fuel line valve is operated from the throttle control via a simple cam drive. When the control is moved away from the stop position into a drive position the fuel line is opened again.

Description

Die Erfindung betrifft eine Gasbetätigungsvorrichtung für zum Anbau an Bodenverdichtungsgeräte bestimmte, einen Membranvergaser und eine absperrbare Verbindung zwischen einem Treibstofftank und dem Vergaser aufweisende Verbrennungsmotoren mit einem Stellorgan, das zur Veränderung der Vergaserstellung wahlweise in mehrere Schaltstellungen, von Vollast über Leerlauf in eine den Motor stoppende Schaltstellung und zurück, bewegbar ist.The invention relates to a gas actuation device for attachment to soil compaction equipment, a membrane carburetor and a lockable connection between a fuel tank and the carburetor internal combustion engines having an actuator that can be used to change the carburetor position in several switching positions, from full load to idling in a switching position stopping the engine and back, is movable.

Viertaktmotoren der kleineren Bauweise, aber auch Zweitaktmotoren werden üblicherweie mit Schwimmervergasern ausgerüstet. Schwimmervergaser eignen sich jedoch nicht für Einsatzzwecke, wo sie Schräglagen und/oder starken Vibrationen ausgesetzt sind, weil dadurch die Gefahr einer Überflutung beteht bzw. die Vergaser starkem Verschleiß ausgesetzt sind. Bodenverdichtungsgeräte sind häufig derartigen Betriebssituationen ausgesetzt, weshalb ihre Motoren bevorzugt mit Membranvergasern ausgerüstet werden.Four-stroke engines of the smaller design, but also two-stroke engines are usually equipped with float carburettors. However, float carburettors are not suitable for applications where they are exposed to inclinations and / or strong vibrations, because this creates the risk of flooding or the carburetors are exposed to heavy wear. Soil compacting devices are often exposed to such operating situations, which is why their engines are preferably equipped with membrane carburettors.

Membranvergaser der einfachen Baureihe, die nur eine Membran zur Treibstoffregelung aufweisen, aber auch Vergaser mit einer zusätzlichen zweiten Membran zur Treibstoffförderung sind für Vibrationsmaschinen wesentlich besser geeignet, jedoch kann aufgrund der starken Vibrationen, aber auch wegen Verschleiß und Verschmutzung, nicht mit Sicherheit davon ausgegangen werden, daß diese Vergaser nach dem Stillsetzen der Motoren absolut zuverlässig dicht sind.Membrane carburettors of the simple series, which only have one membrane for fuel control, but also carburettors with an additional second membrane for fuel delivery are much more suitable for vibration machines, however, due to the strong vibrations, but also due to wear and contamination, it cannot be assumed with certainty that these carburetors are absolutely reliably sealed after the engines are stopped.

Insbesondere bei längerer Arbeitsunterbrechung ist es daher notwendig, daß die in der Leitungsverbindung zwischen dem meist höher gelegenen Treibstofftank und dem Vergaser befindliche Absperrvorrichtung nach dem Stillsetzen des Motors zuverlässig geschlossen wird. Andernfalls besteht die Gefahr, daß der Motor überflutet wird, so z.B. bei hängenden Motoren, daß das Benzin-Öl-Gemisch in den Zylinderkopf läuft, oder daß bei stehend angeordneten Motoren das Gemisch in das Kurbelgehäuse des Motors fließt.Particularly when there is a long break in work, it is therefore necessary that the shut-off device located in the line connection between the mostly higher fuel tank and the carburetor is reliably closed after the engine is stopped. Otherwise there is a risk that the motor will be flooded, e.g. in hanging engines, that the gasoline-oil mixture runs into the cylinder head, or that in the case of standing engines, the mixture flows into the crankcase of the engine.

In beiden Fällen ergeben sich aufgrund des Treibstoffüberschusses Startschwierigkeiten.In both cases, there are starting difficulties due to the excess fuel.

Der Erfindung liegt die Aufgabe zugrunde, eine Gasbetätiungsvorrichtung der eingangs beschriebenen Art so auszubilden, daß nach dem Stillsetzen des Motors die Unterbrechung der Leitungsverbindung zwischen Treibstofftank und Vergaser zuverlässig gewährleistet ist, unabhängig davon, ob der das Gerät Bedienende sich jeweils beim Stillsetzen des Motors der Notwendigkeit bewußt ist, daß der Benzinhahn bzw. die jeweils vorgesehene Absperrvorrichtung in der Treibstoffleitung in Sperrstellung überführt werden muß.The invention has for its object to provide a gas actuation device of the type described in such a way that after the engine has been stopped, the interruption of the line connection between the fuel tank and the carburetor is reliably ensured, regardless of whether the operator of the device is in need of stopping the engine is aware that the fuel tap or the respective shut-off device in the fuel line must be moved into the locked position.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß in der Bewegungsbahn des Stellorgans zwischen der Leerlaufstellung und der Stoppstellung eine Sperrstellung angeordnet und derart gestaltet ist, daß beim Passieren der Sperrstellung von der Leerlauf- zur Stoppstellung die Leitungsverbindung zwischen Treibstofftank und Vergaser unterbrochen und beim Passieren der Sperrstellung in Gegenrichtung diese Leitungsverbindung wieder geöffnet wird.This object is achieved in that a blocking position is arranged in the movement path of the actuator between the idle position and the stop position and is designed such that the line connection between the fuel tank and the carburetor is interrupted when passing the blocking position from the idling position to the stop position and when passing the blocking position this line connection is opened again in the opposite direction.

Der Bedienende muß bei dieser Konstruktion zur Motorsteuerung nur ein einziges Stellorgan betätigen, wobei die einzelnen Schaltstellungen des Stellorgans eine logische Reihenfolge aufweisen. Bei einer kurzen Arbeitsunterbrechung kann das Stellorgan von der Vollgasstellung in den Leerlauf überführt werden und durch eine gegenläufige Bewegung des Stellorgans kann die Motorleistung jederzeit wieder erhöht werden. Soll der Motor stillgesetzt werden, wird die Bewegung des Stellorgans von der Vollgasstellung in die Leerlaufstellung in gleicher Richtung fortgesetzt, d.h. die Leerlaufstellung wird in Richtung auf die Stoppstellung verlassen. Diese Bewegung führt zunächst in eine Position, in der die Absperrvorrichtung in der Treibstoffleitung in die Schließstellung überführt wird, wodurch der Motor zu Stillstand kommt, wenn die auf der Vergaserseite der Absperrvorrichtung befindliche Treibstoffmenge verbraucht ist. Soll der Motor sofort stillgesetzt werden, wird die Bewegung des Stellorgans weiter in der gleichen Richtung fortgesetzt, bis die Stoppstellung erreicht wird, wo nach einer bevorzugten Ausgestaltung in der Bewegungsbahn des Stellorgans ein durch dieses betätigbarer Kurzschlußknopf angeordnet ist. Die gleiche Wirkung wird erzielt, wenn nach einer anderen Variante statt eines Kurzschlußknopfs ein Schalter zum Abschalten der Unterbrecherleitung vorgesehen ist. Da für den Motorstart das Stellorgan aus der Stoppstellung wieder in eine dem Motorbetrieb zugeordnete Stellung überführt werden muß, wird damit zugleich der Kurzschluß aufgehoben bzw. die Unterbrecherleitung wieder zugeschaltet, die Absperrvorrichtung wird wieder geöffnet und die Leitungsverbindung zwischen dem Treibstofftank und dem Vergaser wiederhergestellt.In this construction, the operator only has to actuate a single control element for motor control, the individual switch positions of the control element having a logical sequence. In the event of a brief interruption of work, the actuator can be switched from full throttle to idle and the motor output can be increased again at any time by moving the actuator in opposite directions. If the engine is to be stopped, the movement of the actuator continues from the full throttle position to the idle position in the same direction, ie the idle position is left in the direction of the stop position. This movement initially leads to a position in which the shut-off device in the fuel line is brought into the closed position, as a result of which the engine comes to a standstill when the amount of fuel on the carburetor side of the shut-off device has been used up. If the motor is to be stopped immediately, the movement of the actuator continues in the same direction until the stop position is reached, where, according to a preferred embodiment, a short-circuit button which can be actuated by this is arranged in the movement path of the actuator. The same effect is achieved if, according to another variant, a switch for switching off the interrupter line is provided instead of a short-circuit button. Since the actuator has to be transferred from the stop position to a position assigned to engine operation for the engine start, the short circuit is thus also canceled or the interrupter line is switched on again, the shut-off device is opened again and the line connection between the fuel tank and the carburetor is restored.

Eine vorteilhafte Ausgestaltung besteht bei einer Gasbetätigungsvorrichtung mit einem in der Leitungsverbindung zwischen Treibstofftank und Vergaser angeordneten, mechanisch betätigbaren Absperrventil darin, daß eine zur Betätigung des Absperrventils geeignete mechanische Stellverbindung zwischen dem Stellorgan und dem Absperrventil ein erstes, mit dem Absperrventil verbundenes Stellglied umfaßt, das über eine Steuerkurve mit einem zweiten, zum Stellorgan gehörenden Stellglied verstellbar verbunden ist, wobei nach einer vorteilhaften Weiterbildung das erste Stellglied in seine der Öffnungsstellung des Absperrventils zugeordnete Stellung vorgespannt ist und unter der Wirkung dieser Vorspannung derart in die Bahn des zweiten Stellglieds ragt, daß es von diesem zweiten Stellglied gegen die Wirkung der Vorspannung in seine der Sperrstellung des Absperrventils zugeordnete Stellung gedrückt wird, solange sich das Stellorgan in einem auf die Leerlaufstellung folgenden und bis zur Stoppstellung, diese einschließend, führenden, sperrenden Bahnabschnitt befindet.An advantageous embodiment consists in a gas actuating device with a mechanically actuated shut-off valve arranged in the line connection between the fuel tank and the carburetor, in that a mechanical actuating connection suitable for actuating the shut-off valve between the actuating element and the shut-off valve comprises a first actuator connected to the shut-off valve, which via a control cam is adjustably connected to a second actuator belonging to the actuator, according to an advantageous development the first actuator being biased into its position assigned to the open position of the shut-off valve is and under the effect of this bias in the path of the second actuator that it is pressed by this second actuator against the action of the bias in its associated position of the shut-off valve, as long as the actuator in a following the idle position and up to the stop position, including this, leading, blocking path section.

Nach einer zweckmäßigen ersten Variante umfaßt das Stellorgan einen Schwenkhebel, der einen Steuernocken aufweist, an dem das erste Stellglied unter Wirkung der Vorspannung in einer in Bezug auf die Stellhebelachse etwa radialen Richtung anliegt.According to an expedient first variant, the actuator comprises a pivot lever which has a control cam on which the first actuator bears in an approximately radial direction with respect to the lever axis under the action of the pretension.

Eine andere Variante besteht darin, daß das erste Stellglied unter der Wirkung der Vorspannung an einem seine Bewegung begrenzenden Anschlag anliegt und daß das zweite Stellglied dem ersten Stellglied derart zugeordnet ist, daß eine Wirkverbindung zwischen beiden Stellgliedern besteht, solang sich das Stellorgan in seinem sperrenden Bahnabschnitt befindet.Another variant is that the first actuator rests under the action of the bias against a stop limiting its movement and that the second actuator is assigned to the first actuator in such a way that there is an operative connection between the two actuators as long as the actuator is in its blocking path section located.

Die DD 80589 zeigt und beschreibt eine Kraftstoffschaltvorrichtung für Vergaser von Brennkraftmaschinen, die bei einem solchen Vergaser die Leerlaufeinrichtung nach Ausschalten der Zündung bzw. im Schubbetrieb abschaltet, wobei die Abschaltung mittels eines Elektromagnetventils erfolgt.DD 80589 shows and describes a fuel switching device for carburetors of internal combustion engines, which in such a carburetor switches off the idling device after switching off the ignition or in overrun mode, the switching off being carried out by means of an electromagnetic valve.

Aus der US-PS 2,619,185 ist es bekannt, in die Kraftstoffleitung eines Kraftfahrzeugs eine Einrichtung einzufügen, die den Kraftfluß durch die Leitung abhängig von der Lage des Kraftfahrzeugs unterbricht, wenn dieses z.B. bei einem Unfall umgestoßen wird oder sich überschlägt.From US Pat. No. 2,619,185 it is known to insert a device into the fuel line of a motor vehicle which interrupts the flow of force through the line depending on the position of the motor vehicle, e.g. is knocked over or rolls over in an accident.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispiels der Erfindung wird diese näher dargestellt.Using an embodiment of the invention shown in the drawing, this is shown in more detail.

Es zeigt:

Fig. 1
eine die Gasbetätigungsvorrichtung des Antriebsmotors zeigende, seitliche Detailansicht eines Bo denverdichtungsgeräts,
Fig. 2
eine Detailansicht des Antriebsmotors mit dem Vergaser und der Startvorrichtung,
Fig. 3
eine teilweise nach der Linie III-III in Fig. 1 geschnittene Ansicht und
Fig. 4
eine Detailansicht ähnlich Fig. 1, teilweise geschnitten nach der Linie IV-IV in Fig. 3.
It shows:
Fig. 1
a detailed side view of the soil compression device showing the gas actuation device of the drive motor,
Fig. 2
a detailed view of the drive motor with the carburetor and the starting device,
Fig. 3
a partially cut along the line III-III in Fig. 1 and
Fig. 4
2 shows a detailed view similar to FIG. 1, partially cut along the line IV-IV in FIG. 3.

Ein Bodenverdichtungsgerät 10, das nur durch ein rohrförmiges Teilstück seines Rahmens dargestellt ist, wird durch einen Verbrennungsmotor für Vergaserkraftstoff betrieben, von dem in Fig. 2 ein Teil des Vergasers 12 zu sehen ist, dessen Drosselklappe durch einen Hebel 14 betätigbar ist. Am Hebel 14 greift ein Bowdenzug 16 an, dessen anderes Ende mit einem um eine Achse 20 (Fig. 1) verschwenkbaren Stellhebel 22 verbunden ist und mit diesem zusammen ein Stellorgan 18 zur Steuerung des Motors bildet. In Fig. 1 befindet sich dieser mit einem Handgriff 24 (Fig.3) versehene Stellhebel 22 in seiner einen Endstellung, der Vollaststellung D, aus der er in Fig. 1 entgegen dem Uhrzeigersinn aufeinanderfolgend in eine Leerlaufstellung C, eine das Schließen der Kraftstoffleitung veranlassende Stellung B und seine andere Endstellung A bewegbar ist, wobei in dieser Stellung A der Motor sofort stillgesetzt wird, indem entweder die Zündung kurzgeschlossen oder der Unterbrecherkreis abgeschaltet wird. Die Stellbewegung des Stellhebels 22 wird durch den Bowdenzug 16, dessen Verlauf zwischen dem Stellhebel 22 und dem Hebel 14 der Drosselklappe durch eine die Fig. 1 und 2 verbindende strichpunktierte Linie symbolisch dargestellt ist, auf diesen Hebel 14 übertragen.A soil compactor 10, which is only represented by a tubular section of its frame, is operated by an internal combustion engine for gasoline fuel, of which a part of the gasifier 12 can be seen in FIG. 2, the throttle valve of which can be actuated by a lever 14. A bowden cable 16 acts on the lever 14, the other end of which is connected to an adjusting lever 22 which can be pivoted about an axis 20 (FIG. 1) and together with this forms an adjusting element 18 for controlling the motor. In Fig. 1 this is provided with a handle 24 (Fig.3) adjusting lever 22 in its one end position, the full load position D, from which it in Fig. 1 counterclockwise in an idling position C, one causing the fuel line to close Position B and its other end position A can be moved, in which position A the engine is stopped immediately by either shorting the ignition or switching off the interrupter circuit. The actuating movement of the actuating lever 22 is transmitted to this lever 14 by the Bowden cable 16, the course of which between the actuating lever 22 and the lever 14 of the throttle valve is symbolically represented by a dash-dotted line connecting FIGS. 1 and 2.

Der Hebel 14 ist mit einem Exzenternocken 26 versehen, der beim Erreichen der Stoppstellung einen Kurzschlußknopf 28 betätigt und dadurch den Motor sofort stillsetzt.The lever 14 is provided with an eccentric cam 26 which actuates a short-circuit button 28 when the stop position is reached and thereby immediately stops the motor.

In Fig. 2 bezeichnet 29 die Startvorrichtung für den Motor.In Fig. 2, 29 denotes the starting device for the engine.

Von einem Kraftstofftank 30 (Fig. 3) führt eine Kraftstoffleitung 32 zu einem Absperrventil 34 und von dessen Ausgang 36 weiter zum Vergaser 12. Das Absperrventil 34 enthält einen durch eine Feder 39 in die Öffnungsstellung vorgespannten Ventilschieber 40, der aus dem Ventilgehäuse 42 in einer in Bezug auf die Achse 20 radialen Richtung herausragt und dem am Stellhebel 22 eine Steuerkurve 44 zugeordnet ist. Diese Steuerkurve 44 weist eine nockenartige Erhebung 46 auf, die geeignet ist, den Ventilschieber 40 entgegen der Wirkung der Ventilfeder 39 in seine Sperrstellung zu drücken, wenn der Stellhebel 24 ausgehend von der Stellung C die Stellung B erreicht. In der Sperrstellung des Ventilschiebers 40 ist die Versorgung des Vergasers 12 aus dem Kraftstofftank 30 vollständig unterbrochen.A fuel line 32 leads from a fuel tank 30 (FIG. 3) to a shut-off valve 34 and from its outlet 36 to the carburetor 12. The shut-off valve 34 contains a valve slide 40, which is biased into the open position by a spring 39 and which emerges from the valve housing 42 in one protrudes in the radial direction with respect to the axis 20 and to which a control cam 44 is assigned on the actuating lever 22. This control curve 44 has a cam-like elevation 46, which is suitable for pushing the valve slide 40 into its blocking position against the action of the valve spring 39 when the actuating lever 24 reaches position B starting from position C. In the locked position of the valve slide 40, the supply of the carburetor 12 from the fuel tank 30 is completely interrupted.

Claims (7)

Gasbetätigungsvorrichtung für zum Anbau an Bodenverdichtungsgeräte (10) bestimmte, einen Membranvergaser (12) und eine absperrbare Verbindung (32) zwischen einem Treibstofftank (30) und dem Vergaser (12) aufweisende Verbrennungsmotoren mit einem Stellorgan (18), das zur Veränderung der Vergaserstellung wahlweise in mehrere Schaltstellungen, von Vollast (D) über Leerlauf (C) in eine den Motor stoppende Schaltstellung (A) und zurück, bewegbar ist, dadurch gekennzeichnet, daß in der Bewegungsbahn des Stellorgans (18) zwischen der Leerlaufstellung (C) und der Stoppstellung (A) eine Sperrstellung (B) angeordnet und derart gestaltet ist, daß beim Passieren der Sperrstellung (B) von der Leerlauf- (C) zur Stoppstellung (A) die Leitungsverbindung (32) zwischen Treibstofftank (30) und Vergaser (12) unterbrochen und beim Passieren der Sperrstellung in Gegenrichtung diese Leitungsverbindung (32) wieder geöffnet wird.Gas actuating device for internal combustion engines having a membrane carburetor (12) and a lockable connection (32) between a fuel tank (30) and the carburetor (12) and having an actuator (18) which can be used to change the carburetor position can be moved into several switching positions, from full load (D) via idling (C) to a switching position (A) stopping the engine, and back, characterized in that in the movement path of the actuator (18) between the idling position (C) and the stop position (A) a blocking position (B) is arranged and designed such that when passing the blocking position (B) from idle (C) to stop position (A) the line connection (32) between the fuel tank (30) and carburetor (12) is interrupted and when passing the blocking position in the opposite direction, this line connection (32) is opened again. Vorrichtung nach Anspruch 1 mit einem in der Leitungsverbindung (32) zwischen Treibstofftank (30) und Vergaser (12) angeordneten, mechanisch betätigbaren Absperrventil (34), dadurch gekennzeichnet, daß eine zur Betätigung des Absperrventils (34) geeignete mechanische Stellverbindung zwischen dem Stellorgan (18) und dem Absperrventil (34) ein erstes, mit dem Absperrventil (34) verbundenes Stellglied (40) umfaßt, das über eine Steuerkurve (44) mit einem zweiten, zum Stellorgan (18) gehörenden Stellglied (22) verstellbar verbunden ist.Apparatus according to claim 1 with a mechanically operable shut-off valve (34) arranged in the line connection (32) between the fuel tank (30) and the carburetor (12), characterized in that a mechanical actuating connection suitable for actuating the shut-off valve (34) between the actuator ( 18) and the shut-off valve (34) comprises a first actuator (40) connected to the shut-off valve (34), which is adjustably connected via a control cam (44) to a second actuator (22) belonging to the actuator (18). Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß das erste Stellglied (40) in seine der Öffnungsstellung des Absperrventils (34) zugeordnete Stellung vorgespannt ist und unter der Wirkung dieser Vorspannung (39) derart in die Bahn des zweiten Stellglieds (22) ragt, daß es von diesem zweiten Stellglied (22) gegen die Wirkung der Vorspannung (39) in seine der Sperrstellung des Absperrventils (34) zugeordnete Stellung gedrückt wird, solange sich das Stellorgan (18) in einem auf die Leerlaufstellung (C) folgenden und bis zur Stoppstellung (A), diese einschließend, führenden, sperrenden Bahnabschnitt befindet.Apparatus according to claim 2, characterized in that the first actuator (40) is biased into its position assigned to the open position of the shut-off valve (34) and under the action of this pretension (39) protrudes into the path of the second actuator (22) such that it is pressed by this second actuator (22) against the action of the pretension (39) into its position associated with the blocking position of the shut-off valve (34) as long as the actuator (18) is in a blocking path section following the idle position (C) and including the stop position (A), including this. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Stellorgan (18) einen Schwenkhebel (22) umfaßt, der einen Steuernocken (46) aufweist, an dem das erste Stellglied (40) unter Wirkung der Vorspannung (39) in einer in Bezug auf die Stellhebelachse (20) etwa radialen Richtung anliegt.Apparatus according to claim 3, characterized in that the actuator (18) comprises a pivot lever (22) having a control cam (46) on which the first actuator (40) under the action of the bias (39) in one with respect to the Adjustment lever axis (20) abuts approximately radial direction. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das erste Stellglied (40) unter der Wirkung der Vorspannung (39) an einem seine Bewegung begrenzenden Anschlag anliegt und daß das zweite Stellglied (22) dem ersten Stellglied (40) derart zugeordnet ist, daß eine Wirkverbindung zwischen beiden Stellgliedern (22, 40) besteht, solange sich das zweite Stellglied (22) in seinem sperrenden Bahnabschnitt befindet.Apparatus according to claim 3, characterized in that the first actuator (40) under the action of the bias (39) abuts a stop limiting its movement and that the second actuator (22) is associated with the first actuator (40) such that a There is an operative connection between the two actuators (22, 40) as long as the second actuator (22) is in its blocking path section. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in der Stoppstellung (A) in der Bewegungsbahn des Stellorgans (18) ein durch dieses betätigbarer Kurzschlußknopf (28) angeordnet ist.Device according to one of the preceding claims, characterized in that a short-circuit button (28) which can be actuated by this is arranged in the stop position (A) in the path of movement of the actuator (18). Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß in der Stoppstellung in der Bewegungsbahn des Stellorgans ein Schalter angeordnet ist, der die Unterbrecherleitung unterbricht, so lange sich das Stellorgan in der Stoppstellung befindet.Device according to one of claims 1 to 5, characterized in that a switch is arranged in the stop position in the movement path of the actuator, which interrupts the interrupter line as long as the actuator is in the stop position.
EP96120893A 1995-12-29 1996-12-27 Gas operating device for mounting on soil densification machine used in internal combustion engines with membrane carburettor Expired - Lifetime EP0781910B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19549113A DE19549113C1 (en) 1995-12-29 1995-12-29 Gas actuation device for internal combustion engines with membrane carburettors intended for attachment to soil compaction equipment
DE19549113 1995-12-29

Publications (2)

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EP0781910A1 true EP0781910A1 (en) 1997-07-02
EP0781910B1 EP0781910B1 (en) 2000-06-07

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US (1) US5720250A (en)
EP (1) EP0781910B1 (en)
JP (1) JP3977469B2 (en)
DE (2) DE19549113C1 (en)
ES (1) ES2147890T3 (en)

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WO2011120705A1 (en) 2010-04-01 2011-10-06 Bomag Gmbh Gas-actuated device for a soil compacting machine and soil compacting machine having such a gas-actuated device
DE102021110788A1 (en) 2021-04-27 2022-10-27 Wacker Neuson Produktion GmbH & Co. KG Fuel supply device for an internal combustion engine

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US7165536B2 (en) * 2004-06-14 2007-01-23 Tecumseh Products Company Evaporative emissions control system for small internal combustion engines
JP2007278239A (en) 2006-04-11 2007-10-25 Mikasa Sangyo Co Ltd Throttle adjusting device for vibration compacting machine
US8408183B2 (en) * 2008-04-22 2013-04-02 Briggs & Stratton Corporation Ignition and fuel shutoff for engine
JP5344760B2 (en) * 2009-10-28 2013-11-20 株式会社日立建機カミーノ Small compacting machine
DE102010005597A1 (en) * 2010-01-25 2011-07-28 BOMAG GmbH, 56154 Soil compacting device with removable fuel line
DE102010014898A1 (en) 2010-04-14 2011-10-20 Bomag Gmbh Tank stop valve for alternate interruption and release of fuel connection between fuel tank and combustion engine of soil compaction device, has piston that is supported by valve housing in axially movable manner
DE102011100155A1 (en) * 2011-05-02 2012-11-08 Bomag Gmbh Actuating device for a soil compacting device with an internal combustion engine, soil compacting device with such an actuating device and actuating means
DE102015115654B4 (en) 2015-09-17 2018-10-31 Meflex Telecontrol Gmbh & Co. Kg Encoder for the mixture adjustment of an internal combustion engine
US11326566B2 (en) 2017-03-02 2022-05-10 Briggs & Stratton, Llc Transport valve system for outdoor power equipment
EP3369920B1 (en) * 2017-03-02 2021-09-22 Briggs & Stratton Corporation Transport valve system for outdoor power equipment
US11111861B2 (en) 2017-03-03 2021-09-07 Briggs & Stratton, Llc Engine speed control system

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DE102006026387B4 (en) * 2005-07-06 2007-12-27 Dynapac Compaction Equipment Ab actuator
WO2011120705A1 (en) 2010-04-01 2011-10-06 Bomag Gmbh Gas-actuated device for a soil compacting machine and soil compacting machine having such a gas-actuated device
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DE102021110788A1 (en) 2021-04-27 2022-10-27 Wacker Neuson Produktion GmbH & Co. KG Fuel supply device for an internal combustion engine

Also Published As

Publication number Publication date
DE59605395D1 (en) 2000-07-13
US5720250A (en) 1998-02-24
DE19549113C1 (en) 1997-07-31
JPH09195855A (en) 1997-07-29
ES2147890T3 (en) 2000-10-01
EP0781910B1 (en) 2000-06-07
JP3977469B2 (en) 2007-09-19

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