EP0115758A1 - Port-controlled two-stroke internal combustion engine - Google Patents

Port-controlled two-stroke internal combustion engine Download PDF

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Publication number
EP0115758A1
EP0115758A1 EP83890236A EP83890236A EP0115758A1 EP 0115758 A1 EP0115758 A1 EP 0115758A1 EP 83890236 A EP83890236 A EP 83890236A EP 83890236 A EP83890236 A EP 83890236A EP 0115758 A1 EP0115758 A1 EP 0115758A1
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EP
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Prior art keywords
piston
channel
combustion engine
internal combustion
air
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EP83890236A
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German (de)
French (fr)
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Alfred Rabl
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Individual
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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
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • F02B25/20—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18
    • 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
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • F02B25/20—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18
    • F02B25/22—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18 by forming air cushion between charge and combustion residues
    • 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

Definitions

  • the invention relates to a slot-controlled two-stroke internal combustion engine with a crankcase purge pump and a purge air supply device, the purge air and the fuel mixture being fed separately to the combustion chamber via channels.
  • Valves for the suction of purge air arranged on the fuel mixture overflow channels are known. In these, the purge air was sucked into the crankcase and leaned the fuel mixture too much. There was not much left as a real purging air supply before the fuel mixture when changing the gas and the expected success was therefore lacking.
  • the subject of the invention is characterized in that the fuel mixture flows into the crankcase, and that the piston has an opening which intermittently communicates with a channel supplying purge air provided in the cylinder wall and allows fresh air to flow in to the piston crown when the piston is moving upwards, and that close to it Piston bottom and / or in the cylinder wall, a channel is provided through which the compressed air flows from the area of the piston head into the cylinder chamber at the end of the piston exit.
  • the two-stroke internal combustion engine according to Example 1 with the well-known reverse purging has an inlet channel 2 arranged on the cylinder 1 for the fuel mixture and on both sides of the outlet channel 4 fuel mixture overflow channels 3 and purge air overflow channels 16.
  • the outside of the piston 5 has a channel 10 which runs parallel to the longitudinal axis and opens into the piston cavity at its upper end.
  • the channel 10 is connected to the channel 9 on the cylinder wall 1.
  • the outside end of the channel 9 connects to the channel 11 with an interposed check valve 12 on.
  • the channel 11 opens into the carburetor 6 between the carburetor nozzle 17 and a throttle valve 13. If the piston goes down, the channel 15 in the piston 5 is connected to the purge air overflow channel 16 in the cylinder wall 1.
  • the bore 15 ends after the piston head 23, which means only air can safely enter the combustion chamber via the channels 16.
  • the two-stroke internal combustion engine according to the invention operates in the following manner: in the illustration according to FIG. 1, the piston 5 is in the intake position, the fuel mixture passing under the pistons 5 into the crankcase space of the crankcase 7 via the carburetor 6 and the inlet duct 2. However, this does not also reach the piston cavity 8 because purging air is sucked into the piston cavity via the channels 9 and 10.
  • the purpose of the channel 11 is that the purge air is also controlled with the fuel mixture by the throttle 13.
  • an air filter, a check valve 12 and only one channel guide into the piston cavity are sufficient.
  • the purge air intake can also be done separately, regardless of the carburetor, if you want to do without co-control.
  • the channel 10 sweeps with a piston 5 sliding down a web 14 in the intake duct 2, whereby a connection from the duct 10 to the intake duct 2 is prevented.
  • the carburetor 6 can just as well be a carburetor with a throttle piston, which also controls the purge air intake.
  • FIG. 2 shows how a channel in the piston is suitable for the air inlet into the piston cavity as well as for the air overflow into the combustion chamber.
  • the piston has a channel 20 which opens into the piston cavity 8 at its upper end with an opening 21.
  • the channel 20 is connected to the air overflow channel 18 and the valve 24, as a result of which air enters the piston cavity 8.
  • fuel mixture passes through opening 25 from a carburetor, not shown, into crankcase 7.
  • a carburetor not shown
  • crankcase 7 As piston 5 moves downward, air in the piston cavity and fuel mixture in the crankcase compress.
  • the combustion mixture flows through the channel 26 and air via the channel 18 into the combustion chamber. The air prevents the fuel mixture from flowing out into outlet 4.
  • the purge air construction shown in FIG. 2 can be operated without leaving the scope of the invention instead of the overflow channel 26 with the overflow channels 3 as shown in FIG.
  • the main idea of the invention is that there is an opening in the piston, which is periodically connected to a supply opening for fresh air in the cylinder, so that fresh air can get into the upper part of the interior of the piston, from where it through a Cylinder wall provided overflow channel or compressed through the opening 15 is transferred into the cylinder.
  • both openings ie the opening 15 and the channel 16
  • the overflow channel 16 and the opening 15 could then be omitted.
  • both measures could also be present together.
  • fresh air will flow through the overflow channel 18 and through the opening 21 into the interior of the piston in the position of the piston shown.
  • Channel 26 replaced.
  • Channel 25 corresponds to intake channel 6 and channel 3 to channel 26. However, either channel 3 or channel 26 could also be present.

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

Abstract

The engine has a crankcase scavenging pump and a scavenging air feed device. Along with the usual equipment for intake into the crankcase (7) of the combustible mixture via a carburettor, further channels (9, 10 and 20, 21) are provided in the cylinder wall (1) and on the piston (5) for the intake of air into the piston chamber (8). <IMAGE>

Description

Die Erfindung betrifft eine schlitzgesteuerte Zweitaktbrennkraftmaschine mit Kurbelkastenspülpumpe und einer Spülluftvorlageeinrichtung, wobei die Spülluft und das Brenngemisch voneinander getrennt über Kanäle dem Brennraum zugeführt werden.The invention relates to a slot-controlled two-stroke internal combustion engine with a crankcase purge pump and a purge air supply device, the purge air and the fuel mixture being fed separately to the combustion chamber via channels.

An den Brenngemischüberströmkanälen angeordnete Ventile für die Ansaugung von Spülluft sind bekannt. Bei diesen wurde die Spülluft in den Kurbelkasten eingesaugt und magerte das Brenngemisch zu sehr ab. Als echte Spülluftvorlage vor dem Brenngemisch beim Gaswechsel blieb nicht viel übrig und der erwartete Erfolg blieb daher aus.Valves for the suction of purge air arranged on the fuel mixture overflow channels are known. In these, the purge air was sucked into the crankcase and leaned the fuel mixture too much. There was not much left as a real purging air supply before the fuel mixture when changing the gas and the expected success was therefore lacking.

Diese Nachteile können vermieden werden, wenn in den Kurbelkasten Brenngemisch und in den Kolbenhohlraum Luft eingebracht wird und diese geschichtet bleiben bis sie beim Gaswechselvorgang getrennt in den Brennraum übersetzen können. Die Spülluft soll beim Übersetzen in den Brennraum durch entsprechende Führung und Anordnung der Spülluft-überströmkanäle das Brenngemisch vor dem Austritt in den Auslaß behindern und selbst anstatt dem Brenngemisch in den Auslaß verloren gehen.These disadvantages can be avoided if air is introduced into the crankcase combustion mixture and into the piston cavity and these remain layered until they can translate separately into the combustion chamber during the gas exchange process. The purge air should be at the over put in the combustion chamber by appropriate guidance and arrangement of the purge air overflow channels obstruct the fuel mixture before it exits into the outlet and are lost instead of the fuel mixture in the outlet.

Der Erfindungsgegenstand ist dadurch gekennzeichnet, daß das Brenngemisch in den Kurbelkasten einströmt, und daß der Kolben eine Öffnung aufweist, welche intermittierend mit einem in der Zylinderwand vorgesehenen Spülluft zuführenden Kanal in Verbindung tritt und beim Aufwärtsgang des Kolbens Frischluft zum Kolbenboden einströmen läßt und daß nahe dem Kolbenboden und bzw. oder in der Zylinderwand ein Kanal vorgesehen ist, durch welchen am Ende des Kolbenniederganges die komprimierte Luft aus dem Bereich des Kolbenbodens in den Zylinderraum strömt.The subject of the invention is characterized in that the fuel mixture flows into the crankcase, and that the piston has an opening which intermittently communicates with a channel supplying purge air provided in the cylinder wall and allows fresh air to flow in to the piston crown when the piston is moving upwards, and that close to it Piston bottom and / or in the cylinder wall, a channel is provided through which the compressed air flows from the area of the piston head into the cylinder chamber at the end of the piston exit.

In der Zeichnung sind zwei Ausführungsbeispiele des Erfindungsgegenstandes im Schnitt dargestellt.In the drawing, two exemplary embodiments of the subject matter of the invention are shown in section.

Die erfindungsgemäße Zweitaktbrennkraftmaschine nach Beispiel Figur 1 mit der allgemein bekannten Umkehrspülung besitzt einen am Zylinder 1 angeordneten Einlaßkanal 2 für das Brenngemisch und beiderseits des Auslaßkanales 4 Brenngemisch-Uberströmkanäle 3 und Spülluft-Überströmkanäle 16. Hierbei ist durch die Schnittzeichnung bedingt nur je ein Kanal 3 und 16 ersichtlich. Der Kolben 5 weist außenseitig einen parallel zur Längsachse verlaufenden Kanal 10 auf, der an seinem oberen Ende in den Kolbenhohlraum mündet. Während eines Teiles der Hubbewegung ist der Kanal 10 mit dem Kanal 9 auf der Zylinderwand 1 in Verbindung. Das außenseitige Ende des Kanales 9 schließt an den Kanal 11 mit zwischengeschalteten Rückschlagventil 12 an. Der Kanal 11 mündet im Vergaser 6 zwischen Vergaserdüse 17 und einer Drosselklappe 13. Geht der Kolben nach unten erfolgt eine Verbindung des Kanals 15 im Kolben 5 mit dem Spülluft-Überströmkanal 16 in der Zylinderwand 1. Die Bohrung 15 endet nach dem Kolbenboden 23, womit sicher nur Luft über die Kanäle 16 in den Brennraum gelangt.The two-stroke internal combustion engine according to Example 1 with the well-known reverse purging has an inlet channel 2 arranged on the cylinder 1 for the fuel mixture and on both sides of the outlet channel 4 fuel mixture overflow channels 3 and purge air overflow channels 16. Here, due to the sectional drawing, only one channel 3 and 16 can be seen. The outside of the piston 5 has a channel 10 which runs parallel to the longitudinal axis and opens into the piston cavity at its upper end. During part of the lifting movement, the channel 10 is connected to the channel 9 on the cylinder wall 1. The outside end of the channel 9 connects to the channel 11 with an interposed check valve 12 on. The channel 11 opens into the carburetor 6 between the carburetor nozzle 17 and a throttle valve 13. If the piston goes down, the channel 15 in the piston 5 is connected to the purge air overflow channel 16 in the cylinder wall 1. The bore 15 ends after the piston head 23, which means only air can safely enter the combustion chamber via the channels 16.

Die erfindungsgemäße Zweitaktbrennkraftmaschine arbeitet in folgender Weise: in der Darstellung nach Fig. 1 ist der Kolben 5 in Ansaugstellung, wobei über den Vergaser 6 und dem Einlaßkanal 2 das Brenngemisch unter den Kolben 5 in den Kurbelkastenraum des Kurbelkastens 7 gelangt. Dieses gelangt jedoch nicht auch in den Kolbenhohlraum 8, weil über die Kanäle 9 und 10 in den Kolbenhohlraum Spülluft gesaugt wird.The two-stroke internal combustion engine according to the invention operates in the following manner: in the illustration according to FIG. 1, the piston 5 is in the intake position, the fuel mixture passing under the pistons 5 into the crankcase space of the crankcase 7 via the carburetor 6 and the inlet duct 2. However, this does not also reach the piston cavity 8 because purging air is sucked into the piston cavity via the channels 9 and 10.

Mit dem Kanal 11 wird bezweckt, daß die Spülluft gleichermaßen mit dem Brenngemisch von der Drossel 13 mitgesteuert wird. Zudem genügt ein Luftfilter, ein Rückschlagventil 12 und nur eine Kanalführung in den Kolbenhohlraum. Die Spülluftansaugung kann auch gesondert, unabhängig vom Vergaser erfolgen, wenn man auf die Mitsteuerung verzichten will. Der Kanal 10 überstreicht mit abwärtsgleitendem Kolben 5 einen Steg 14 im Ansaugkanal 2, womit eine Verbindung vom Kanal 10 zum Ansaugkanal 2 unterbunden ist.The purpose of the channel 11 is that the purge air is also controlled with the fuel mixture by the throttle 13. In addition, an air filter, a check valve 12 and only one channel guide into the piston cavity are sufficient. The purge air intake can also be done separately, regardless of the carburetor, if you want to do without co-control. The channel 10 sweeps with a piston 5 sliding down a web 14 in the intake duct 2, whereby a connection from the duct 10 to the intake duct 2 is prevented.

Der Vergaser 6 kann ebensogut ein Vergaser mit Drosselkolben sein, der die Spülluftansaugung mitsteuert.The carburetor 6 can just as well be a carburetor with a throttle piston, which also controls the purge air intake.

Geht der Kolben 5 nach unten, wird zunächst die Luft im Kolbenhohlraum 8 und das Brenngemisch im Kurbelkasten 7 verdichtet, wobei die Schichtung zum größten Teil aufrecht erhalten bleibt. Mit Öffnung des Auslasses 4 strömt das Altgas aus dem Brennraum. Sobald die Öffnungen 15 im Kolben 5 mit den überströmkanälen 16 in Verbindung kommen, und die obere Kolbenkante die Überströmkanten 3 freigibt, strömt die Luft über die Luft-Überströmkanäle 16 und das Brenngemisch über die Brenngemisch-Überströmkanäle 3 in den Brennraum. Die zwischen Auslaß und Brenngemisch vorgelagerte Luft hat einen kurzen Weg zum Auslaß und geht daher anstelle des Brenngemisches in den Auslaß verloren. Mit der Figur 2 wird aufgezeigt, wie ein Kanal im Kolben für den Lufteinlaß in den Kolbenhohlraum wie auch für die Luftüberströmung in den Brennraum geeignet ist.If the piston 5 goes down, the air in the piston cavity 8 and the fuel mixture in the crankcase 7 are first compressed, the stratification being the greatest Part is maintained. When the outlet 4 opens, the waste gas flows out of the combustion chamber. As soon as the openings 15 in the piston 5 come into contact with the overflow channels 16 and the upper piston edge releases the overflow edges 3, the air flows via the air overflow channels 16 and the fuel mixture via the fuel mixture overflow channels 3 into the combustion chamber. The air upstream between the outlet and the fuel mixture has a short path to the outlet and is therefore lost in the outlet instead of the fuel mixture. FIG. 2 shows how a channel in the piston is suitable for the air inlet into the piston cavity as well as for the air overflow into the combustion chamber.

Der Kolben weist wie in Figur 1 einen Kanal 20 auf, der an seinem oberen Ende mit einer Öffnung 21 in den Kolbenhohlraum 8 mündet. Beim Aufwärtsgang des Kolbens 5 ist der Kanal 20 mit dem Luft-Uberstrcmkanal 18 und dem Ventil 24 in Verbindung, wodurch Luft in den Kolbenhohlraum 8 gelangt. Zugleich gelangt Brenngemisch über die Öffnung 25 aus einem Vergaser, nicht gezeichnet, in den Kurbelkasten 7. Mit Abwärtsgang des Kolbens 5 verdichten Luft im Kolbenhchlraum und Brenngemisch im Kurbelkasten. Sobald die Uberströmkanäle 18 und 26 durch die Kolbenkante freigegeben sind, strömt das Brenngemisch über den Kanal 26 und Luft über den Kanal 18 in den Brennraum. Dabei behindert die Luft das Brenngemisch vor dem Ausströmen in den Auslaß 4.As in FIG. 1, the piston has a channel 20 which opens into the piston cavity 8 at its upper end with an opening 21. When the piston 5 is in the upward direction, the channel 20 is connected to the air overflow channel 18 and the valve 24, as a result of which air enters the piston cavity 8. At the same time, fuel mixture passes through opening 25 from a carburetor, not shown, into crankcase 7. As piston 5 moves downward, air in the piston cavity and fuel mixture in the crankcase compress. As soon as the overflow channels 18 and 26 are cleared by the piston edge, the combustion mixture flows through the channel 26 and air via the channel 18 into the combustion chamber. The air prevents the fuel mixture from flowing out into outlet 4.

Man kann die nach Figur 2 dargestellte Spülluftkonstruktion ohne den Rahmen der Erfindung zu verlassen anstatt mit dem Überströmkanal 26 mit den Überströmkanälen 3 wie in Figur 1 dargestellt betreiben.The purge air construction shown in FIG. 2 can be operated without leaving the scope of the invention instead of the overflow channel 26 with the overflow channels 3 as shown in FIG.

Der wesentliche Gedanke der Erfindung liegt darin, daß im Kolben eine Öffnung vorhanden ist, welche mit einer Zufuhröffnung für Frischluft im Zylinder taktweise in Verbindung gebracht wird, sodaß Frischluft in den oberen Teil des Innenraumes des Kolbens gelangen kann, von wo sie durch einen in der Zylinderwand vorgesehenen überströmkanal oder durch die Öffnung 15 komprimiert in den Zylinder überführt wird. Es können aber auch beide Durchbrechungen, d.h. die Öffnung 15 und der Kanal 16 gemeinsam vorhanden sein. Bei der Ausführungsform nach Figur 2 könnte dann der überströmkanal 16 und die Öffnung 15 wegfallen. Als dritte Variante könnten auch beide Maßnahmen gemeinsam vorhanden sein. Bei der Ausführungsform nach Figur 2 wird in der dargestellten Lage des Kolbens Frischluft über den Überströmkanal 18 und über die Öffnung 21 in das Kolbeninnere strömen. Ein Ausströmen von Frischluft in den Zylinder 19 ist nicht möglich, da die Frischluft am Einströmen durch das Altgas gehindert wird. Geht der Kolben nunmehr nach oben, überdeckt er den Umlenkkanal 18, es strömt Frischluft durch die Öffnung 21 noch in das Kolbeninnere hinein, solange bis die Öffnung 21 außerhalb des überströmkanals 18 zu liegen kommt. Beim Niedergehen des Kolbens wird die Luft im Kolbeninneren komprimiert und sobald der Kolben die Lage nach Figur 2 erreicht hat, d.h., daß er den Überströmkanal in Richtung zum Zylinder freigibt, wird die komprimierte Luft des Innenraumes des Kolbens über den überströmkanal 18 in den Zylinderraum einströmen. Bei dieser Ausführungsform ist der Überströmkanal 16 durch den Überströmkanal 18 ersetzt. Es können natürlich, wie gesagt, beide Kanäle nebeneinander vorhanden sein. Der Frischgaskanal 3 der Figur 1 ist bei der Ausführungsform nach Figur 2 durch denThe main idea of the invention is that there is an opening in the piston, which is periodically connected to a supply opening for fresh air in the cylinder, so that fresh air can get into the upper part of the interior of the piston, from where it through a Cylinder wall provided overflow channel or compressed through the opening 15 is transferred into the cylinder. However, both openings, ie the opening 15 and the channel 16, can also be present together. In the embodiment according to FIG. 2, the overflow channel 16 and the opening 15 could then be omitted. As a third variant, both measures could also be present together. In the embodiment according to FIG. 2, fresh air will flow through the overflow channel 18 and through the opening 21 into the interior of the piston in the position of the piston shown. An outflow of fresh air into the cylinder 19 is not possible because the fresh air is prevented from flowing in through the waste gas. If the piston now goes up, it covers the deflection channel 18, fresh air flows through the opening 21 into the interior of the piston until the opening 21 comes to lie outside the overflow channel 18. When the piston descends, the air inside the piston is compressed and as soon as the piston has reached the position according to FIG. 2, ie that it releases the overflow channel towards the cylinder, the compressed air of the interior of the piston will flow into the cylinder chamber via the overflow channel 18 . In this embodiment, the overflow channel 16 is replaced by the overflow channel 18. Of course, as I said, both channels can exist side by side. In the embodiment according to FIG. 2, the fresh gas duct 3 in FIG

Kanal 26 ersetzt. Der Kanal 25 entspricht dem Ansaugkanal 6 und der Kanal 3 dem Kanal 26. Es könnte aber auch entweder der Kanal 3 oder der Kanal 26 vorhanden sein.Channel 26 replaced. Channel 25 corresponds to intake channel 6 and channel 3 to channel 26. However, either channel 3 or channel 26 could also be present.

Claims (6)

1. Schlitzgesteuerte Zweitaktbrennkraftmaschine mit Kurbelkastenspülpumpe und einer Spülluftvorlageeinrichtung, wobei die Spülluft und das Brenngemisch voneinander getrennt über Kanäle dem Brennraum zugeführt werden, dadurch gekennzeichnet, daß das Brenngemisch in den Kurbelkasten einströmt, und daß der Kolben (5) eine Öffnung (10 bzw. 21) aufweist, welche intermittierend mit einem in der Zylinderwand vorgesehenen Spülluft zuführenden Kanal (9 bzw. 18) in Verbindung tritt und beim Aufwärtsgang des Kolbens (5) Frischluft zum Kolbenboden (23) einströmen läßt und daß nahe dem Kolbenboden (23) und bzw. oder in der Zylinderwand ein Kanal (15, 16 bzw. 18, 21) vorgesehen ist, durch welchen am Ende des Kolbenniederganges die komprimierte Luft aus dem Bereich des Kolbenbodens in den Zylinderraum strömt.1. Slot-controlled two-stroke internal combustion engine with crankcase flushing pump and a purge air supply device, the purge air and the combustion mixture being fed separately to the combustion chamber via channels, characterized in that the combustion mixture flows into the crankcase and that the piston (5) has an opening (10 and 21 ) which intermittently communicates with a channel (9 or 18) supplying purge air in the cylinder wall and which allows fresh air to flow in to the piston crown (23) when the piston (5) is upward and that near the piston crown (23) and or or a channel (15, 16 or 18, 21) is provided in the cylinder wall, through which the compressed air flows from the area of the piston head into the cylinder space at the end of the piston depression. 2. Zweitaktbrennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Kolben (5) außenseitig einen längsverlaufenden Kanal (10 bzw. 20) aufweist, welcher in die Öffnung (21) des Kolbens mündet und zum Frischluft führenden Kanal (18 bzw. 9) hin offen ist.2. Two-stroke internal combustion engine according to claim 1, characterized in that the piston (5) on the outside has a longitudinal channel (10 or 20) which opens into the opening (21) of the piston and leading to fresh air channel (18 or 9) is open. 3. Zweitaktbrennkraftmaschine nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß der Kanal (9) in der Zylinderwand (1) mit einem Kanal (11) im Vergaser (6) verbunden ist und von einer der Vergaserdüse (17) vorgeschalteten Drossel (13), Drosselkolben od.dgl. mitgesteuert wird.3. Two-stroke internal combustion engine according to claims 1 and 2, characterized in that the channel (9) in the cylinder wall (1) with a channel (11) in the carburetor (6) is connected and from one of the carburetor nozzle (17) upstream throttle (13th ), Throttle piston or the like. is also controlled. 4. Zweitaktbrennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der nahe dem Boden (23) des Kolbens (5) in dessen Innenraum (8) mündende Kanal (15) unter den Kolbenringen (22) austritt.4. Two-stroke internal combustion engine according to claim 1, characterized in that the near the bottom (23) of the piston (5) in its interior (8) opening channel (15) under the piston rings (22). 5. Zweitaktbrennkraftmaschine nach den Ansprüchenl und 3, dadurch gekennzeichnet, daß in der Ansaugöffnung (2) ein Mittelsteg (14) angeordnet ist.5. Two-stroke internal combustion engine according to claims 1 and 3, characterized in that a central web (14) is arranged in the intake opening (2). 6. Zweitaktbrennkraftmaschine nach den Ansprüchen 1, 2 und 4, dadurch gekennzeichnet, daß ein luftführender Überströmkanal (18) sowie ein Brenngemisch führender Überströmkanal (26) vorgesehen sind, die in einer Ebene übereinander angeordnet sind.6. Two-stroke internal combustion engine according to claims 1, 2 and 4, characterized in that an air-carrying overflow channel (18) and a combustion mixture leading overflow channel (26) are provided, which are arranged one above the other in one plane.
EP83890236A 1983-01-07 1983-12-28 Port-controlled two-stroke internal combustion engine Withdrawn EP0115758A1 (en)

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AT4583 1983-01-07
AT45/83 1983-01-07

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Cited By (3)

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DE3916063A1 (en) * 1988-05-26 1989-11-30 Kioritz Corp TWO-STROKE INTERNAL COMBUSTION ENGINE
AT400879B (en) * 1991-07-15 1996-04-25 Bombardier Rotax Gmbh TWO-STROKE INTERNAL COMBUSTION ENGINE WITH A CRANKCASE RINSE
US6817323B2 (en) 2001-02-01 2004-11-16 John Arthur Notaras Internal combustion engine

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DE2943496A1 (en) * 1978-12-13 1980-06-26 Zschopau Motorrad Veb Cylinder in two stroke IC engine - has baffle plate below piston forming chambers connected to inlet channels and overflow ducts
GB2115485A (en) * 1982-02-17 1983-09-07 Nat Res Dev Stratified charge two-stroke engines

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DE748415C (en) * 1937-06-24 1944-11-02 Mixture compressing two-stroke internal combustion engine
DE2621628A1 (en) * 1975-05-22 1976-12-09 Outboard Marine Corp TWO-STROKE COMBUSTION ENGINE
DE2943496A1 (en) * 1978-12-13 1980-06-26 Zschopau Motorrad Veb Cylinder in two stroke IC engine - has baffle plate below piston forming chambers connected to inlet channels and overflow ducts
GB2115485A (en) * 1982-02-17 1983-09-07 Nat Res Dev Stratified charge two-stroke engines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3916063A1 (en) * 1988-05-26 1989-11-30 Kioritz Corp TWO-STROKE INTERNAL COMBUSTION ENGINE
AT400879B (en) * 1991-07-15 1996-04-25 Bombardier Rotax Gmbh TWO-STROKE INTERNAL COMBUSTION ENGINE WITH A CRANKCASE RINSE
US6817323B2 (en) 2001-02-01 2004-11-16 John Arthur Notaras Internal combustion engine

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