EP0151313B1 - Gas powered engine - Google Patents

Gas powered engine Download PDF

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Publication number
EP0151313B1
EP0151313B1 EP84116383A EP84116383A EP0151313B1 EP 0151313 B1 EP0151313 B1 EP 0151313B1 EP 84116383 A EP84116383 A EP 84116383A EP 84116383 A EP84116383 A EP 84116383A EP 0151313 B1 EP0151313 B1 EP 0151313B1
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EP
European Patent Office
Prior art keywords
gas
valve
piston
engine
shut
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84116383A
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German (de)
French (fr)
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EP0151313A1 (en
Inventor
Peter A. Dr.Sc.Techn. Neukomm
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PEWA TECHNIC AG
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PEWA TECHNIC AG
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Priority to AT84116383T priority Critical patent/ATE31343T1/en
Publication of EP0151313A1 publication Critical patent/EP0151313A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B25/00—Regulating, controlling, or safety means
    • F01B25/02—Regulating or controlling by varying working-fluid admission or exhaust, e.g. by varying pressure or quantity
    • 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
    • F02B75/34—Ultra-small engines, e.g. for driving models
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H29/00—Drive mechanisms for toys in general
    • A63H29/10—Driving mechanisms actuated by flowing media
    • A63H29/16—Driving mechanisms actuated by flowing media by steam or compressed air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B17/00—Reciprocating-piston machines or engines characterised by use of uniflow principle
    • F01B17/02—Engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B29/00—Machines or engines with pertinent characteristics other than those provided for in preceding main groups
    • F01B29/08—Reciprocating-piston machines or engines not otherwise provided for
    • F01B29/10—Engines

Definitions

  • the present invention relates to a gas engine with a cylindrical working space closed by a gas inlet valve designed as an openable check valve and a piston reciprocating therein, and with a gas supply channel leading from a compressed gas container to the gas inlet valve.
  • Such a gas engine is known from GB-A-1 553 678.
  • a piston is arranged so that it can move back and forth in a cylindrical working space.
  • the piston is connected via a connecting rod to a crankshaft that carries the propeller of a model airplane.
  • the cylinder head has a central bore that can be closed by a gas inlet valve.
  • a ball located in the cylinder head on the side facing away from the cylinder space and behind the central bore on a valve seat serves as the valve body.
  • the cylinder head is connected via a gas supply channel to a compressed gas container containing carbon dioxide. The gas pressure pushes the ball onto the valve seat and keeps the gas inlet valve closed.
  • the gas inlet valve works like a check valve.
  • the gas inlet valve is pushed open by means of an extension formed on the top of the piston and opened in order to allow gas to flow into the working space.
  • the approach hits the ball when the piston is in the top dead center area at the end of its backward stroke and at the start of its working stroke and lifts it off the valve seat.
  • the piston can stop in the course of its reverse stroke shortly before reaching the top dead center area or in the dead center area. In this case, restarting the engine is difficult because the piston has to perform at least one partial stroke against full gas pressure when starting. It can also happen that the gas engine starts in the wrong direction for this reason. In the case of toys, such as toy cars and other driven devices with a reduction gear between the motor shaft and the motor starting point, a restart can even become impossible.
  • a reduction in compression in the cylinder mentioned in DE-C-253 141 during starting of the engine by keeping a purge valve open would lead to a large loss of drive gas because drive gas would escape through the open purge valve.
  • the object of the invention is to provide a gas engine of the type mentioned, which is easy and always startable in the desired direction of rotation in all positions of the piston in the cylinder and also in the presence of a step-down gear between the motor shaft and the motor starting point, the handling of the motor should be easy when starting.
  • a multi-way shut-off device arranged in the gas supply channel is provided with two valve closure parts which can be connected to one another and can be brought into two positions, of which the first in the second position of the multi-way shut-off device, in the start position of the gas engine, the inlet side of the gas inlet valve with one outside connects the opening air duct and closes the air duct in the operating position and acts as a check valve and keeps both valve closure parts under the pressure prevailing in the compressed gas container in the operating position and the second valve closure part closes the compressed gas container in the starting position and in the operating position the gas supply duct between the Releases the inlet side of the gas inlet valve and the pressure gas container, the two valve closure parts being able to be pushed from the outside against the force acting on the check valve from the operating position into the starting position.
  • the two valve closure parts are provided on one of the two effective areas of the valve closure parts, provided with longitudinal grooves in a longitudinally displaceable manner by means of two O-rings which are axially spaced apart and held in parallel in stationary parts and serve as a valve seat cylindrical pin formed, the part provided with longitudinal grooves when the valve is open and the cylindrical part without longitudinal grooves in the O-ring when the valve is closed.
  • the single figure shows a gas engine with a reusable shut-off device in the starting position in section.
  • the piston 1 of the gas engine shown is guided to and fro in a cylinder 2 and is connected via a connecting rod 3 to a crankshaft 5 mounted in a crankshaft housing 4.
  • the crankshaft 5 can drive the wheels of a toy car or directly the propeller of a model airplane via a gear, not shown.
  • the application of the gas engine is by no means limited to toys.
  • the cylinder head 6 is screwed onto an extension of the cylinder 2 and, on its part which projects into the bore of the cylinder 2 and is provided with an O-ring 7, carries a gas inlet valve 9 which is tightly guided in the cylinder bore by an O-ring 8.
  • the closure part of the gas inlet valve 9 consists of a ball 12 that can be pushed through a gas inlet opening 11 by an extension 10 formed on the top of the piston 1.
  • the gas inlet valve 9 moves in the cylinder bore, thereby causing the valve to open and thus the speed of the gas engine can be regulated.
  • the gas released in the cylinder chamber escapes through the exhaust opening 32 when the piston 1 is in the lowest position.
  • a gas supply channel 14 is provided between the gas inlet valve 9 and a compressed gas container 13 containing a suitable drive gas.
  • the compressed gas container 13 is a commercially available carbon dioxide cartridge with liquefied gas, which is screwed onto the crankshaft housing 4 by means of a sleeve 15.
  • This reusable shut-off device 16 has an actuating button 17 which is accessible from the outside and which can assume a depressed starting position and an operating position shown in broken lines in the figure. In the starting position, the inlet side of the gas inlet valve 9 is vented via an air duct 18 leading to the outside and the compressed gas container 13 is closed.
  • the reusable shut-off device 16 is equipped with two valve closure parts 19, 20 connected to one another.
  • the two closure parts 19, 20 are formed on a cylindrical pin 21 which can block the flow of gas through two O-rings 22, 23 serving as valve seats. The space between the two O-rings 22, 23 communicates with the inlet side of the gas inlet valve 9.
  • the sides of the O-rings 22, 23 facing away from this space are in gas connection with the compressed gas container 13 or with the air duct 18.
  • the cylindrical pin 21 is longitudinally displaceable up to the stops and has partial longitudinal grooves 24 in the two effective areas of the valve closure parts 19, 20. If the valve for ventilation of the cylinder space between the inlet side of the gas inlet valve 9 and the air duct 18 is to be opened, the pin 21 is pressed into the O-ring 22 until the longitudinal grooves 24 come to rest in the region of the O-ring . Through the longitudinal grooves 24, the gas can escape from the gas inlet valve 9 via the air duct 18. In this position of the pin 21, however, the cylindrical part of the closure part 20 reaches the area of the O-ring 23 and closes the compressed gas container 13.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Glass Compositions (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Gas Separation By Absorption (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Toys (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Fluid-Driven Valves (AREA)
  • Check Valves (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

A piston of a gas engine is reciprocatingly guided in a cylinder. A gas inlet valve whose valve closure component consists of a ball is situated in the cylinder head. The ball is pushed open in the top dead-center position of the piston by a protrusion formed on the upper portion of the piston in order to admit propellant gas into an expansion chamber formed by the cylinder. The gas engine must be set into operation by turning a crankshaft. If the piston accidentally lies near top dead-center when starting, the piston must be moved against full gas pressure. In order to alleviate starting, a shut-off device is provided which has a start position and an operational position. The shut-off device connects the inlet side of the gas inlet valve with an air conduit opening into ambient air and obturates a pressurized gas container in the start position. The shut-off device obturates the air conduit and clears a gas supply conduit leading from the pressurized gas container to the inlet side of the gas inlet valve in the operational position. With the help of this shut-off device, it is possible to start even gas motors equipped with gear-reduction transmissions.

Description

Die vorliegende Erfindung betrifft einen Gasmotor mit einem durch ein als aufstossbares Rückschlagventil ausgebildetes Gaseinlassventil abgeschlossenen zylindrischen Arbeitsraum und einem darin hin-und hergehenden Kolben sowie mit einem von einem Druckgasbehälter zum Gaseinlassventil führenden Gaszufuhrkanal.The present invention relates to a gas engine with a cylindrical working space closed by a gas inlet valve designed as an openable check valve and a piston reciprocating therein, and with a gas supply channel leading from a compressed gas container to the gas inlet valve.

AusderGB-A-1 553 678 ist ein solcher Gasmotor bekannt. Bei diesem Motor ist ein Kolben in einem zylindrischen Arbeitsraum hin-und herbeweglich angeordnet. Der Kolben ist über eine Pleuelstange mit einer Kurbelwelle verbunden, die den Propeller eines Modellflugzeuges trägt. Der Zylinderkopf weist eine mittige Bohrung auf, die durch ein Gaseinlassventil verschliessbar ist. Als Ventilkörper dient eine im Zylinderkopf an der dem Zylinderraum abgekehrten Seite, hinter der mittigen Bohrung an einem Ventilsitz liegende Kugel. Der Zylinderkopf steht über einen Gaszuführungskanal mit einem Kohlendioxid enthaltenden Druckgasbehälter in Verbindung. Der Gasdruck drückt die Kugel auf den Ventilsitz und hält das Gaseinlassventil geschlossen. Das Gaseinlassventil funktioniert wie ein Rückschlagventil. Das Gaseinlassventil wird mittels eines an der Kolbenoberseite gebildeten Ansatzes aufgestossen und geöffnet, um Gas in den Arbeitsraum einströmen zu lassen. Der Ansatz stösst, wenn der Kolben sich bei Beendigung seines Rückwärtshubes und bei Beginn seines Arbeitshubes im oberen Totpunktbereich befindet, gegen die Kugel und hebt diese vom Ventilsitz ab. Beim Abstellen des Motors kann der Kolben im Laufe seines Rückwärtshubes kurz vor dem Erreichen des oberen Totpunktbereiches oder im Totpunktbereich stehen bleiben. Ein Wiederstarten des Motors ist in diesem Fall mit Schwierigkeiten verbunden, weil der Kolben beim Starten mindestens einen Teilhub gegen den vollen Gasdruck durchführen muss. Es kann auch vorkommen, dass der Gasmotor aus diesem Grund in der falschen Drehrichtung ansprigt. Bei Spielzeugen, wie Spielzeugautos und anderen angetriebenen Vorrichtungen mit einem untersetzenden Getriebe zwischen der Motorenwelle und der Motoranwurfstelle kann ein Wiederstarten sogar unmöglich werden. Eine in der DE-C-253 141 erwähnte Kompressionsverminderung im Zylinder während dem Anwerfen des Motors durch Offenhalten eines Spülventils würde zu einem grossen Antriebsgasverlust führen, weil durch das offene Spülventil Antriebsgas entweichen würde.Such a gas engine is known from GB-A-1 553 678. In this motor, a piston is arranged so that it can move back and forth in a cylindrical working space. The piston is connected via a connecting rod to a crankshaft that carries the propeller of a model airplane. The cylinder head has a central bore that can be closed by a gas inlet valve. A ball located in the cylinder head on the side facing away from the cylinder space and behind the central bore on a valve seat serves as the valve body. The cylinder head is connected via a gas supply channel to a compressed gas container containing carbon dioxide. The gas pressure pushes the ball onto the valve seat and keeps the gas inlet valve closed. The gas inlet valve works like a check valve. The gas inlet valve is pushed open by means of an extension formed on the top of the piston and opened in order to allow gas to flow into the working space. The approach hits the ball when the piston is in the top dead center area at the end of its backward stroke and at the start of its working stroke and lifts it off the valve seat. When the engine is switched off, the piston can stop in the course of its reverse stroke shortly before reaching the top dead center area or in the dead center area. In this case, restarting the engine is difficult because the piston has to perform at least one partial stroke against full gas pressure when starting. It can also happen that the gas engine starts in the wrong direction for this reason. In the case of toys, such as toy cars and other driven devices with a reduction gear between the motor shaft and the motor starting point, a restart can even become impossible. A reduction in compression in the cylinder mentioned in DE-C-253 141 during starting of the engine by keeping a purge valve open would lead to a large loss of drive gas because drive gas would escape through the open purge valve.

Aufgabe der Erfindung ist es, einen Gasmotor der eingangs erwähnten Art anzugeben, der in allen Stellungen des Kolbens im Zylinder und auch beim Vorliegen eines untersetzenden Getriebes zwischen der Motorenwelle und der Motoranwurfstelle leicht und immer in der gewünschten Drehrichtung startbar ist, wobei die Handhabung des Motors beim Anwerfen einfach sein soll.The object of the invention is to provide a gas engine of the type mentioned, which is easy and always startable in the desired direction of rotation in all positions of the piston in the cylinder and also in the presence of a step-down gear between the motor shaft and the motor starting point, the handling of the motor should be easy when starting.

Die gestellte Aufgabe ist dadurch gelöst, dass eine im Gaszufuhrkanal angeordnete Mehrwegabsperrvorrichtung mit zwei miteinander verbundenen in zwei Stellungen bringbaren Ventil-Verschlussteilen vorgesehen ist, wovon der erste in der zweiten Stellung der Mehrwegabsperrvorrichtung, in der Startstellung des Gasmotors die Einlassseite des Gaseinlassventils mit einem ins Freie mündenden Luftkanal verbindet und in der Betriebsstellung den Luftkanal verschliesst und als Rückschlagventil wirkt und dabei beide Ventil-Verschlussteile unter dem im Druckgasbehälter herrschenden Druck in der Betriebsstellung hält und der zweite Ventil-Verschlussteil in der Startstellung den Druckgasbehälter verschliesst und in der Betriebsstellung den Gaszufuhrkanal zwischen der Einlasseite des Gaseinlassventils und dem Druckgashälter freigibt, wobei die beiden Ventil-Verschlussteile von aussen gegen die auf das Rückschlagventil wirkende Kraft aus der Betriebsstellung in die Startstellung stossbar sind.The object is achieved in that a multi-way shut-off device arranged in the gas supply channel is provided with two valve closure parts which can be connected to one another and can be brought into two positions, of which the first in the second position of the multi-way shut-off device, in the start position of the gas engine, the inlet side of the gas inlet valve with one outside connects the opening air duct and closes the air duct in the operating position and acts as a check valve and keeps both valve closure parts under the pressure prevailing in the compressed gas container in the operating position and the second valve closure part closes the compressed gas container in the starting position and in the operating position the gas supply duct between the Releases the inlet side of the gas inlet valve and the pressure gas container, the two valve closure parts being able to be pushed from the outside against the force acting on the check valve from the operating position into the starting position.

Vorteilhafterweise sind die zwei Ventil-Verschlussteile an einem durch zwei in ortsfesten Teilen axial beabstandet und parallel gehaltene, als Ventilsitz dienende O-Ringe längsverschiebbar durchgeführten, mindestens in der Betriebsstellung an einem Anschlag anstehenden, in den beiden Wirkbereichen der Ventil-Verschlussteile teilweise mit Längsnuten versehenen zylindrischen Stift ausgebildet, wobei beim geöffneten Ventil jeweils der mit Längsnuten versehene Teil und beim geschlossenen Ventil der zylindrische Teil ohne Längsnuten im O-Ring liegt.Advantageously, the two valve closure parts are provided on one of the two effective areas of the valve closure parts, provided with longitudinal grooves in a longitudinally displaceable manner by means of two O-rings which are axially spaced apart and held in parallel in stationary parts and serve as a valve seat cylindrical pin formed, the part provided with longitudinal grooves when the valve is open and the cylindrical part without longitudinal grooves in the O-ring when the valve is closed.

Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels näher beschrieben.The invention is described in more detail below using an exemplary embodiment.

Die einzige Figur zeigt einen Gasmotor mit einer Mehrwegabsperrvorrichtung in der Startstellung im Schnitt.The single figure shows a gas engine with a reusable shut-off device in the starting position in section.

Der Kolben 1 des dargestellten Gasmotors ist in einem Zylinder 2 hin- und herbeweglich geführt und über eine Pleuelstange 3 mit einer in einem Kurbelwellengehäuse 4 gelagerten Kurbelwelle 5 verbunden. Die Kurbelwelle 5 kann über ein nicht gezeigtes Getriebe die Räder eines Spielzeugautos oder direkt den Propeller eines Modellflugzeuges antreiben. Die Anwendung des Gasmotors ist aber keineswegs auf Spielzeuge beschränkt. Der Zylinderkopf 6 ist auf eine Verlängerung des Zylinders 2 aufgeschraubt und trägt an seinem in die Bohrung des Zylinders 2 ragenden mit einem O-Ring 7 versehenen Teil ein in der Zylinderbohrung durch einen O-Ring 8 dicht geführtes Gaseinlassventil 9. Der Verschlussteil des Gaseinlassventils 9 besteht aus einer durch einen an der Oberseite des Kolbens 1 gebildeten Fortsatz 10 durch eine Gaseinlassöffnung 11 aufstossbaren Kugel 12. Durch Ein- und Ausschrauben des Zylinderkopfes 6 verschiebt sich das Gaseinlassventil 9 in der Zylinderbohrung, wodurch der Zeitpunkt der Ventilöffnung und somit die Drehzahl des Gasmotors reguliert werden kann. Das im Zylinderraum entspannte Gas entweicht bei der untersten Stellung des Kolbens 1 über die Auspufföffnung 32.The piston 1 of the gas engine shown is guided to and fro in a cylinder 2 and is connected via a connecting rod 3 to a crankshaft 5 mounted in a crankshaft housing 4. The crankshaft 5 can drive the wheels of a toy car or directly the propeller of a model airplane via a gear, not shown. The application of the gas engine is by no means limited to toys. The cylinder head 6 is screwed onto an extension of the cylinder 2 and, on its part which projects into the bore of the cylinder 2 and is provided with an O-ring 7, carries a gas inlet valve 9 which is tightly guided in the cylinder bore by an O-ring 8. The closure part of the gas inlet valve 9 consists of a ball 12 that can be pushed through a gas inlet opening 11 by an extension 10 formed on the top of the piston 1. By screwing the cylinder head 6 in and out, the gas inlet valve 9 moves in the cylinder bore, thereby causing the valve to open and thus the speed of the gas engine can be regulated. The gas released in the cylinder chamber escapes through the exhaust opening 32 when the piston 1 is in the lowest position.

Zwischen dem Gaseinlassventil 9 und einem einen geeigneten Antriebsgas enthaltenden Druckgasbehälter 13 ist ein Gaszufuhrkanal 14 vorgesehen. Der Druckgasbehälter 13 ist eine handelsübliche Kohlendioxidpatrone mit verflüssigtem Gas, die mittels einer Hülse 15 am Kurbelwellengehäuse 4 angeschraubt ist.A gas supply channel 14 is provided between the gas inlet valve 9 and a compressed gas container 13 containing a suitable drive gas. The compressed gas container 13 is a commercially available carbon dioxide cartridge with liquefied gas, which is screwed onto the crankshaft housing 4 by means of a sleeve 15.

Gasmotoren müssen angeworfen werden. Wenn der Kolben 1 beim Anwerfen zufällig in der Nähe des oberen Totpunktes liegt, muss der Kolben 1 gegen den vollen Gasdruck bewegt werden. Diese Bewegung ist bei Gasmotoren mit direkt an der Kurbelwelle 5 angebrachtem Betriebsmittel, z.B. Propeller, zwar schwer, aber in den meisten Fällen doch durchführbar. Wenn zwischen der Kurbelwelle 5 und dem zum Anwerfen geeigneten Teil des Betriebsmittels ein Untersetzungsgetriebe angeordnet ist, kann ein Anwerfen des Gasmotors sogar unmöglich sein. Dies kann beispielsweise bei Spielzeugautos der Fall sein, wo die Reibung der Räder am Boden beim Anwerfen das erreichbare Drehmoment begrenzt. Um auch in solchen Fällen das Anwerfen des Gasmotors zu ermöglichen, ist in der Anordnung gemäss der Figur eine Mehrwegabsperrvorrichtung 16 vorgesehen. Diese Mehrwegabsperrvorrichtung 16 hat einen von aussen zugänglichen Betätigungsknopf 17, der eine niedergedrückte Startstellung und eine in der Figur gestrichelt dargestellte Betriebsstellung einnehmen kann. In der Startstellung wird die Einlassseite des Gaseinlassventils 9 über einen ins Freie führenden Luftkanal 18 entlüftet und der Druckgasbehälter 13 verschlossen. Zu diesem Zweck ist die Mehrwegabsperrvorrichtung 16 mit zwei miteinander verbunden Ventil-Verschlussteilen 19,20 ausgerüstet. Die beiden Verschlussteile 19, 20 sind an einem zylindrischen Stift 21 ausgebildet, der in zwei als Ventilsitze dienenden O-Ringen 22, 23 das Durchströmen des Gases sperren kann. Der Raum zwischen den beiden O-Ringen 22, 23 steht mit der Einlassseite des Gaseinlassventils 9 in Verbindung. Die diesem Raum abgekehrten Seiten der O-Ringe 22, 23 liegen mit dem Druckgasbehälter 13 bzw. mit dem Luftkanal 18 in Gasverbindung. Der zylindrische Stift 21 ist bis zu den Anschlägen längsverschiebbar und weist in den beiden Wirkbereichen der Ventil-Verschlussteile 19, 20 teilweise Längsnuten 24 auf. Wenn das Ventil zur Lüftung des Zylinderraumes zwischen der Einlassseite des Gaseinlassventils 9 und dem Luftkanal 18 geöffnet werden soll, so drückt man den Stift 21 so weit in den O-Ring 22 hinein, bis die Längsnuten 24 im Bereich des O-Ringes zu liegen kommen. Durch die Längsnuten 24 kann das Gas vom Gaseinlassventil 9 über den Luftkanal 18 entweichen. In dieser Stellung des Stiftes 21 gelangt aber der zylindrische Teil des Verschlussteils 20 in den Bereich des O-Ringes 23 und verschliesst den Druckgasbehälter 13. Beim Loslassen des Betätigungsknopfes 17 wird der Stift 21 durch den im Druckgasbehälter 13 herrschenden und auf die Stirnfläche des Stiftes 21 wirkenden Druck in die in der Figur gestrichelt gezeichnete Betriebsstellung geschoben. In dieser Betriebsstellung liegen die Längsnuten 24 im Bereich des O-Ringes 23, wodurch der Gaszufuhrkanal 14 vom Druckgasbehälter 13 bis zur Einlassseite des Gaseinlassventils 9 durchgehend offen ist. Der Luftkanal 18 ist durch den im Bereich des O-Ringes 22 liegenden zylindrischen Teil des Ventil-Verschlussteils 19 verschlossen.Gas engines must be started. If the piston 1 happens to be near top dead center when starting, the piston 1 must be moved against full gas pressure. This move Supply is difficult for gas engines with equipment attached directly to the crankshaft 5, for example propeller, but in most cases it can be carried out. If a reduction gear is arranged between the crankshaft 5 and the part of the equipment suitable for starting, starting the gas engine may even be impossible. This can be the case, for example, in toy cars, where the friction of the wheels on the ground limits the torque that can be achieved when starting. In order to enable the gas engine to be started even in such cases, a reusable shut-off device 16 is provided in the arrangement according to the figure. This reusable shut-off device 16 has an actuating button 17 which is accessible from the outside and which can assume a depressed starting position and an operating position shown in broken lines in the figure. In the starting position, the inlet side of the gas inlet valve 9 is vented via an air duct 18 leading to the outside and the compressed gas container 13 is closed. For this purpose, the reusable shut-off device 16 is equipped with two valve closure parts 19, 20 connected to one another. The two closure parts 19, 20 are formed on a cylindrical pin 21 which can block the flow of gas through two O-rings 22, 23 serving as valve seats. The space between the two O-rings 22, 23 communicates with the inlet side of the gas inlet valve 9. The sides of the O-rings 22, 23 facing away from this space are in gas connection with the compressed gas container 13 or with the air duct 18. The cylindrical pin 21 is longitudinally displaceable up to the stops and has partial longitudinal grooves 24 in the two effective areas of the valve closure parts 19, 20. If the valve for ventilation of the cylinder space between the inlet side of the gas inlet valve 9 and the air duct 18 is to be opened, the pin 21 is pressed into the O-ring 22 until the longitudinal grooves 24 come to rest in the region of the O-ring . Through the longitudinal grooves 24, the gas can escape from the gas inlet valve 9 via the air duct 18. In this position of the pin 21, however, the cylindrical part of the closure part 20 reaches the area of the O-ring 23 and closes the compressed gas container 13. When the actuating button 17 is released, the pin 21 is replaced by the one in the compressed gas container 13 and on the end face of the pin 21 acting pressure pushed into the operating position shown in dashed lines in the figure. In this operating position, the longitudinal grooves 24 lie in the area of the O-ring 23, as a result of which the gas supply channel 14 is continuously open from the compressed gas container 13 to the inlet side of the gas inlet valve 9. The air duct 18 is closed by the cylindrical part of the valve closure part 19 lying in the region of the O-ring 22.

Claims (2)

1. Gas powered engine, comprising a cylindrical combustion chamber closed by a gas inlet valve consisting of a pressure-openable non-retourn valve and a piston adapted to be axially reciprocated in said chamber, and a gas feed conduit connecting a tank filled with pressured gas to said gas inlet valve, characterised in that it comprises a multi-way stop-valve device (16) inserted in said gas feed conduit (14) and provided with two interconnected valve members (19, 20) adapted to be set in two positions, so that said first valve member (19) in the second position of said multi-way stop-valve device, when the gas powered engine is in its starting condition, connects the inlet side of said non-retourn valve (9) to a vent port (18) opening into the atmosphere, and closes said vent port (18) in the engine running condition and acts as a non-return valve to keep both valve members (19, 20) under the pressure existing in said pressured gas tank (13) whereas said second valve member (20), in the starting position, closes said gas tank and, in the running condition, opens said gas feed conduit (14) between the inlet side of said non-return valve (9) and said tank (13), whereby both valve members (19, 20) can be depressed from outside against the force exerted on said non-return valve (9) for swiching from the running position to the starting position.
2. The gas powered engine of Claim 1, characterised in that both valve members (19, 20) of said multi-way stop valve (16) are formed on a cylindrical rod (21) partially provided in said two operative sections of said valve members (19, 20) with longitudinal grooves (24), adapted to be slidably reciprocated in a pair of axially-spaced parallel O-ring seals (22, 23) acting as valve seats and disposed in fixed portions of the engine, said O-ring seals engaging stop means at least in the running position, so that when said non-return valve (9) is open each one of said operative sections of said valve members (19, 20) provided with longitudinal grooves (24) and, when said non-return valve (9) is closed, the cylindrical portion not provided with longitudinal grooves lies in said O-ring seal (22, 23).
EP84116383A 1984-01-25 1984-12-27 Gas powered engine Expired EP0151313B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84116383T ATE31343T1 (en) 1984-01-25 1984-12-27 GAS ENGINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH316/84 1984-01-25
CH316/84A CH662746A5 (en) 1984-01-25 1984-01-25 PRESSURE GAS ENGINE.

Publications (2)

Publication Number Publication Date
EP0151313A1 EP0151313A1 (en) 1985-08-14
EP0151313B1 true EP0151313B1 (en) 1987-12-09

Family

ID=4184233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84116383A Expired EP0151313B1 (en) 1984-01-25 1984-12-27 Gas powered engine

Country Status (13)

Country Link
US (1) US4614085A (en)
EP (1) EP0151313B1 (en)
JP (1) JPS60175702A (en)
KR (1) KR850005548A (en)
AT (1) ATE31343T1 (en)
AU (1) AU3804185A (en)
BR (1) BR8500277A (en)
CH (1) CH662746A5 (en)
DE (1) DE3468057D1 (en)
DK (1) DK599484A (en)
FI (1) FI850257L (en)
NO (1) NO850276L (en)
ZA (1) ZA85380B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5878568A (en) * 1998-04-02 1999-03-09 Chuang; Chia-Chiung Pneumatic tool
NZ337744A (en) 1998-10-26 2001-04-27 Charles D Piston-to-cylinder seal for a pneumatic engine with pressure dependent, variable sealing diameter
US6626079B1 (en) * 2002-03-28 2003-09-30 Rehco, Llc Pneumatic motor
CN106669186A (en) * 2015-11-07 2017-05-17 马铿杰 Large-amplitude motion follow-up type five-degree-of-freedom airworthiness
CN111691925B (en) * 2020-06-24 2021-11-09 张谭伟 Air engine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE381677C (en) * 1923-09-22 Boaf Berlin Oranienburger Arma Compression cock with a rotary slide acting as a valve
DE253141C (en) *
US1189067A (en) * 1913-07-26 1916-06-27 Birge W Davenport Fluid-pressure engine-starter.
US4211083A (en) * 1971-09-22 1980-07-08 Takahiro Ueno Method for driving a vehicle driven by an internal combustion engine
DE3034854A1 (en) * 1976-10-26 1982-05-13 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen Starting air feed for diesel engine - has air feed transfer valve between cylinders closed while starting feed valves are open
GB1553678A (en) * 1977-05-18 1979-09-26 Harden Associated Ltd Engine
US4166441A (en) * 1977-08-09 1979-09-04 Grigsby Gilbert R Compressed air-actuated fluid injection apparatus

Also Published As

Publication number Publication date
NO850276L (en) 1985-07-26
DK599484A (en) 1985-07-26
JPS60175702A (en) 1985-09-09
FI850257L (en) 1985-07-26
CH662746A5 (en) 1987-10-30
EP0151313A1 (en) 1985-08-14
DK599484D0 (en) 1984-12-14
ATE31343T1 (en) 1987-12-15
KR850005548A (en) 1985-08-26
AU3804185A (en) 1985-08-01
BR8500277A (en) 1985-09-03
ZA85380B (en) 1985-09-25
FI850257A0 (en) 1985-01-21
US4614085A (en) 1986-09-30
DE3468057D1 (en) 1988-01-21

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