DE1035964B - Two-stroke internal combustion engine with direct current flushing - Google Patents
Two-stroke internal combustion engine with direct current flushingInfo
- Publication number
- DE1035964B DE1035964B DEH30064A DEH0030064A DE1035964B DE 1035964 B DE1035964 B DE 1035964B DE H30064 A DEH30064 A DE H30064A DE H0030064 A DEH0030064 A DE H0030064A DE 1035964 B DE1035964 B DE 1035964B
- Authority
- DE
- Germany
- Prior art keywords
- cylinder
- pair
- direct current
- combustion engine
- inlet channels
- 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.)
- Pending
Links
Classifications
-
- 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
- F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging
- F02B25/04—Engines having ports both in cylinder head and in cylinder wall near bottom of piston stroke
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
- F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
-
- 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
Landscapes
- 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)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
Z'weitaktbrennkraftmaschine mit Gleichstromspülung Das Hauptpatent betrifft die Ausbildung einer Zweitaktbrennkraftmaschirie mit Gleichstrornspülung und im Zvlinderkopf angeordnetem Auslaßorgan, bei welcher an dem vom Zylinderkopf abgewandten Ende des Arbeitszylinders mehrere Paare von einander diametral gegenüberliegenden, kolbengesteuerten Einlaßkanälen angeordnet sind, die jeweils an gedachten, zum Zylinderumfang konzentrischen und in gleichen Abständen übereinanderliegenden Kreisen tangieren, wobei die zu einem Paar gehörigen Einlaßkanäle in ihrer horizontalen und vertikalen Richtung gleich, von Lnderen paarweisen Einlaßkanälen jedoch verschieden ausgebildet sind und die einander benachbarten Einlaßkanalpaare kontinuierlich ihre horizontale und -ertikale Richtung in der Weise ändern, daß das den Zylinderumfang tangierende Einlaßkanalpaar zur Horizontalebene die größte Neigung besitzt, und bei der ferner die Einlaßkanalpaare, ausgehend von dem den kleinsten gedachten Kreis tangierenden und die geringste Neigung zur Horizontalebene aufweisenden Paar, eine zunehmende düsenartige Verengung besitzen.Two-stroke internal combustion engine with direct current purging The main patent concerns the formation of a two-stroke combustion engine with direct current purging and the outlet member arranged in the cylinder head, in which on that of the cylinder head opposite end of the working cylinder several pairs of diametrically opposite one another, piston-controlled intake ports are arranged, each of the imaginary, to the cylinder circumference are tangent to concentric circles lying on top of each other at equal intervals, the inlet channels belonging to a pair in their horizontal and vertical Same direction, but different from other paired inlet channels are and the adjacent pairs of inlet channels continuously their horizontal and change the vertical direction in such a way that the one tangent to the cylinder circumference Inlet channel pair to the horizontal plane has the greatest inclination, and furthermore the inlet channel pairs, starting from the one tangent to the smallest imaginary circle and the pair exhibiting the least inclination to the horizontal plane, an increasing one have nozzle-like constriction.
Aufgabe dieser Anordnung ist es, daß sich die verschiedenen Spülluftströme aneinander abstützen oder ineinander eingreifen und dadurch im Zylinder allitlählich eine allgemein nach oben gerichtete, kreisende Spülluftbewegung erreicht wird, wobei die durch Reibung des rotierenden Spülstromes an der Zylinderwand entstehenden Geschwindigkeitsverluste ausge--lichen werden und die aufsteigende Spülluftfront der Form des Zylinderkopfes bei seinem Erreichen angepaßt und damit das Ausschieben der verbrannten Altgase durch die im Zylinderkopf liegenden Auslaßöffnungen begünstigt wird.The task of this arrangement is that the various scavenging air flows support each other or engage in each other and thereby allitlählich in the cylinder a generally upward, circular motion of the purge air is achieved, wherein the speed losses caused by the friction of the rotating flushing flow on the cylinder wall and the rising scavenging air front of the shape of the cylinder head adjusted when it is reached and thus pushing out the burnt waste gases is favored by the outlet openings in the cylinder head.
Die im Hauptpatent beschriebene Ausführung ,verwendet einen schalen- oder halbkugelförinig ausgebildeten Brennraum und einen glatten oder leichtgewölbten Kolbenboden.The design described in the main patent uses a shell or hemispherical combustion chamber and a smooth or slightly arched one Piston crown.
Die Zusatzerfindung besteht demgegenüber darin, daß der zentral angeordnete Verbrennungsratim einen Durchmesser aufweist, der kleiner ist als der Zylinderdurchrnesser, so daß eine an sich bekannte Quetsch-Nvirkung in den Verbrennungsraum hinein und eine Erhöhung der Winkelgeschwindigkeit der um die Zylinderachse rotierenden Spülluftströme entsteht.The additional invention consists in the fact that the centrally arranged Combustion rate has a diameter which is smaller than the cylinder diameter, so that a known squeezing effect into the combustion chamber and an increase in the angular velocity of the purge air flows rotating around the cylinder axis arises.
Weiter wird erfindungsgemäß vorgeschlagen, entweder, wie be;m Gegenstand des Hauptpatents vorgesehen, innere Gemischbildung oder auch äußere Geinischbildung vorzusehen.It is further proposed according to the invention either, as in the subject matter of the main patent provided, internal mixture formation or external Geinischbildung to be provided.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt.An exemplary embodiment of the invention is shown in the drawing.
Abb. 1 zeigt schematisch einen Längsschnitt durch den Arbeitszylinder, die Spülschlitze und den Verbrennungsrauni einer Zweitaktbrennkraftmaschine; Abb. 2 und 3 zeigen die Ausbildung der Spülschlitze der Maschine, wobei 1 bis 6 die paarweise angeordneten Schlitze kennzeichnen.Fig. 1 shows schematically a longitudinal section through the working cylinder, the scavenging slots and the combustion chamber of a two-stroke internal combustion engine; Fig. 2 and 3 show the design of the rinsing slots of the machine, with 1 to 6 identifying the slots arranged in pairs.
In Abb. 1 bezeichnet 7 deri Kolben in der dem Verbrennungsraum abgewandten Totlage, 8 den Kolben in der oberen (inneren) Totlage, 9 den Verbrennungsraum, der einen Durchmesser aufweist, welcher kleiner ist als der Zylinderdurchmesser, 10 den Zwischenraum zwischen Zylinderkopfboden und Kolben, der sich mit geringstmöglichem Abstand dem Zylinderkopf nähert, 11 das im Zylinderkopf angeordnete Auslaßorgan, das in diesem Fall z. B. als Walzenschieber dargestellt ist.In Fig. 1 , 7 denotes the piston in the dead position facing away from the combustion chamber, 8 the piston in the upper (inner) dead position, 9 the combustion chamber, which has a diameter which is smaller than the cylinder diameter, 10 the space between the cylinder head base and the piston, which approaches the cylinder head with the smallest possible distance, 11 the outlet member arranged in the cylinder head, which in this case z. B. is shown as a roller valve.
Die erfindungsgemäße Anordnung verbessert die Wirkung des Gegenstandes des Hauptpatents, da sie bei innerer und äußerer Gemischbildung einen hohen Spülwirkungsgrad gewährleistet, d. h. eine weitgehende Annäherung an die reine Verdrängerspülung und gleichzeitig eine Spülströmung, die anfangs gerichtet und wenig verwirbelt ist, aber in der Nähe des oberen Kolbentotpunktes, d. h. vor der Zündung eine hohe Verwirbelung und Strömungsgeschwindigkeit im Verbrennungsraum ergibt.The arrangement according to the invention improves the effect of the subject matter of the main patent, since it ensures a high flushing efficiency with internal and external mixture formation, ie. H. a close approximation to the pure displacement flushing and at the same time a flushing flow that is initially directed and little swirled, but near the top dead center of the piston, d. H. there is a high turbulence and flow velocity in the combustion chamber before ignition.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH30064A DE1035964B (en) | 1956-02-20 | 1956-02-20 | Two-stroke internal combustion engine with direct current flushing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH30064A DE1035964B (en) | 1956-02-20 | 1956-02-20 | Two-stroke internal combustion engine with direct current flushing |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1035964B true DE1035964B (en) | 1958-08-07 |
Family
ID=7151272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEH30064A Pending DE1035964B (en) | 1956-02-20 | 1956-02-20 | Two-stroke internal combustion engine with direct current flushing |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1035964B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001025607A1 (en) * | 1999-10-05 | 2001-04-12 | Man B & W Diesel A/S | Cylinder liner comprising scavenge ports |
FR3020657A1 (en) * | 2014-05-05 | 2015-11-06 | Renault Sas | THERMAL ENGINE TWO-STROKE MOTOR VEHICLE WITH WRINKLING LIGHT WITH RIGHT SIDE EDGES |
-
1956
- 1956-02-20 DE DEH30064A patent/DE1035964B/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001025607A1 (en) * | 1999-10-05 | 2001-04-12 | Man B & W Diesel A/S | Cylinder liner comprising scavenge ports |
FR3020657A1 (en) * | 2014-05-05 | 2015-11-06 | Renault Sas | THERMAL ENGINE TWO-STROKE MOTOR VEHICLE WITH WRINKLING LIGHT WITH RIGHT SIDE EDGES |
FR3020656A1 (en) * | 2014-05-05 | 2015-11-06 | Renault Sas | "THERMAL MOTOR TWO-STROKE AUTOMOTIVE VEHICLE WITH INJECTED LIGHT" |
WO2015170020A3 (en) * | 2014-05-05 | 2016-04-28 | Renault S.A.S | Two-stroke thermal engine of a motor vehicle, comprising twisted inlet ports |
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