DE102011121241A1 - Cylinder head of three-stroke combustion engine, has case valve provided to separate piston and annular spaces at first clock cycle of cylinder, positioned on piston surface at second cycle and arranged in seat at compression phase - Google Patents
Cylinder head of three-stroke combustion engine, has case valve provided to separate piston and annular spaces at first clock cycle of cylinder, positioned on piston surface at second cycle and arranged in seat at compression phase Download PDFInfo
- Publication number
- DE102011121241A1 DE102011121241A1 DE102011121241A DE102011121241A DE102011121241A1 DE 102011121241 A1 DE102011121241 A1 DE 102011121241A1 DE 102011121241 A DE102011121241 A DE 102011121241A DE 102011121241 A DE102011121241 A DE 102011121241A DE 102011121241 A1 DE102011121241 A1 DE 102011121241A1
- Authority
- DE
- Germany
- Prior art keywords
- cylinder head
- sleeve valve
- piston
- cylinder
- sleeve
- 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.)
- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 13
- 238000007906 compression Methods 0.000 title claims abstract description 13
- 230000006835 compression Effects 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000000446 fuel Substances 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 2
- 230000002000 scavenging effect Effects 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000010926 purge Methods 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L5/00—Slide valve-gear or valve-arrangements
- F01L5/04—Slide valve-gear or valve-arrangements with cylindrical, sleeve, or part-annularly shaped valves
- F01L5/045—Piston-type or cylinder-type valves arranged above the piston and coaxial with the cylinder axis
-
- 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
- F02B41/00—Engines characterised by special means for improving conversion of heat or pressure energy into mechanical power
- F02B41/02—Engines with prolonged expansion
- F02B41/06—Engines with prolonged expansion in compound cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L21/00—Use of working pistons or pistons-rods as fluid-distributing valves or as valve-supporting elements, e.g. in free-piston machines
- F01L21/04—Valves arranged in or on piston or piston-rod
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L5/00—Slide valve-gear or valve-arrangements
- F01L5/22—Multiple-valve arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
Die Erfindung betrifft den Zylinderkopf eines Verbrennungsmotors mit einem inneren Kolbenraum, einem Ringraum und einem die Räume trennenden Hülsenventil.The invention relates to the cylinder head of an internal combustion engine with an inner piston chamber, an annular space and a sleeve valve separating the spaces.
Der Stand der Technik zeigt Verbrennungsmotore, die im Zweitakt- und im Viertaktprozess arbeiten. Sie werden immer mit einem Hubkolben betrieben, der sein maximales Hubraumvolumen beim Ansaugen, Verdichten, Expandieren und Ausstoßen beibehält. Da der Expansionsraum dem Verdichtungsraum gleich ist, geht viel Brennenergie, die zur optimalen Nutzung einen größeren Expansionsraum benötig durch den Auspuff verloren. Versuche diesen Vorgang, wie Expansionsraum-Verlängerung beim Gegenkolbenmotor und andere, sind technisch sehr aufwändig und führen zu keinem wesentlich verbesserten Ergebnis.The prior art shows internal combustion engines operating in two-stroke and four-stroke processes. They are always operated with a reciprocating piston, which maintains its maximum displacement in the intake, compression, expansion and ejection. Since the expansion space is equal to the compression space, much burning energy that requires a larger expansion space through the exhaust is lost for optimal use. Try this process, such as expansion space extension in the opposed piston engine and others, are technically very complex and do not lead to a much improved result.
Der Erfindung liegt die Aufgabe zugrunde, den Hubraum, zum Beispiel des Zweitakt-Otto-Motors, so zu gestalten, dass der Expansionsraum ein wesentlich größeres Arbeitsvolumen als der des Verdichtungsraumes aufweist, wobei dieser Vorgang bei einer einzigen Kurbelwellenumdrehung erfolgen soll.The invention has for its object to make the displacement, for example, the two-stroke gasoline engine, so that the expansion space has a much larger working volume than that of the compression chamber, this process should be carried out at a single crankshaft revolution.
Der diese Aufgabe lösende, erfindungsgemäße Zweitaktmotor mit dem dazugehörenden Verfahren hat eine plane Kolbenoberfläche mit einer V-förmigen Ringnut, in der das Hülsenventil bei weichem Aufsetzen hermetisch dichtend anliegt und somit den inneren Kolbenraum von dem Ringraum mit den Auslassschlitzen trennt. Der Kolben fährt während der Brennstoffeinspritzung mit dem Hülsenventil zum oberen Totpunkt, wobei der innere Kolbenraum mit einem Kraftstoffluftgemisch gefüllt ist und der umschließende Ringraum nach Überfahren der Auslassschlitze nur noch reine Spülluft beinhaltet. Nach Erreichen des optimalen Verdichtungsdruckes des Kraftstoffluftgemisches wird die Zündung eingeleitet. Dabei ist das Hülsenventil beim Einfahren in den Zylinderkopf mit Kolbenringen abgedichtet und wird mit einer Führungseinrichtung entsprechend der Arbeitstakte bewegt, wobei im eingefahrenen Zustand das Hülsenventil durch entsprechend ausgeformte Dichtkegel den Hülsenraum hermetisch abdichtet. In dieser Position ist der Kolben im oberen Totpunkt, das Kaftstofftluftgemisch im kugelförmigen Brennraum ist gezündet, dehnt sich über den gesamten Zylinderraum aus und treibt den Kolben in Richtung des unteren Totpunkts. Vor dem unteren Totpunkt gibt der Kolben die Auslassöffnung frei und das Abgas strömt aus dem gesamten Zylinderraum aus. Das Einlassventil öffnet sich, die Spülluft strömt unter Überdruck in den Zylinder ein und spült das restliche Abgas aus. Im Zeitpunkt des Erreichens des unteren Totpunktes setzt das Hülsenventil wieder in der V-förmigen Ringnut auf und dichtet so den inneren Kolbenraum, der mit Spülluft gefüllt ist, ab. Dieser Arbeitsprozess läuft über eine Kurbelwellenumdrehung ab und beginnt wieder neu mit dem Verdichtungsvorgang und der Kraftstoffeinspritzung.The solving this problem, two-stroke engine according to the invention with the associated method has a flat piston surface with a V-shaped annular groove in which the sleeve valve hermetically sealed in soft touch and thus separates the inner piston chamber of the annulus with the outlet slots. The piston moves during the fuel injection with the sleeve valve to top dead center, wherein the inner piston chamber is filled with a fuel-air mixture and the enclosing annular space includes after passing through the exhaust ports only pure purging air. After reaching the optimum compression pressure of the fuel air mixture, the ignition is initiated. In this case, the sleeve valve is sealed when entering the cylinder head with piston rings and is moved with a guide device according to the power strokes, hermetically sealed in the retracted state, the sleeve valve by appropriately shaped sealing cone the sleeve space. In this position, the piston is at top dead center, the Kaftstofftluftgemisch in the spherical combustion chamber is ignited, extends over the entire cylinder chamber and drives the piston in the direction of bottom dead center. Before the bottom dead center, the piston releases the outlet opening and the exhaust gas flows out of the entire cylinder space. The inlet valve opens, the purge air flows under pressure into the cylinder and flushes out the remaining exhaust gas. At the time of reaching the bottom dead center, the sleeve valve resumes in the V-shaped annular groove and thus seals the inner piston chamber which is filled with purging air from. This working process takes place over a crankshaft revolution and starts again with the compression process and the fuel injection.
Die Ausführungen werden anhand der Zeichnungen an einem Ausführungsbeispiel dargestellt.The embodiments are illustrated with reference to the drawings of an embodiment.
Ein in
Der Zylinderkopf
Das Hülsenventil
Der Kolben
Der Restdruck im Zylinder
Der Kolben
In der Nähe des oberen Totpunktes wird die Zündung über die Zündkerze
Die unterschiedlichen Verdichtungsdrücke von Ringraum
Nach Aufheben der Zweiteilung der Kolbenfläche
Die im Aufwärtsgang über den Einlasskanal
Der beschriebene Funktionsablauf erfolgt über eine 360 Grad Kurbelwellenumdrehung und beginnt mit dem Gaswechsel erneut.The functional sequence described is carried out over a 360 degree crankshaft revolution and starts again with the gas exchange.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Zylinderkopfcylinder head
- 22
- Kolbenpiston
- 33
- Hülsenventilsleeve valve
- 44
- Zylindercylinder
- 55
- Einlassventilintake valve
- 66
- unterer Totpunktbottom dead center
- 77
- V-förmige RingnutV-shaped ring groove
- 88th
- innerer Kolbenrauminner piston chamber
- 99
- oberer TotpunktTop Dead Center
- 1010
- Kurbelgehäusecrankcase
- 1111
- Ringraumannulus
- 1212
- Brennstoff-EinspritzventilFuel injector
- 1313
- Zündkerzespark plug
- 1414
- Kolbenflächepiston area
- 1515
- Abgaskanalexhaust duct
- 1616
- Spülluftpurge air
- 1717
- Einlasskanalinlet channel
- 1818
- Halbkugel-BrennraumHemispherical combustion chamber
- 1919
- Kolbenringepiston rings
- 2020
- ZylinderkopfdeckelCylinder head cover
- 2121
- Totraumdead space
- 2222
- Bohrungdrilling
- 2323
- Ringspaltannular gap
- 2424
- Zylindercylinder
- 2525
- Kugel-BrennraumBall combustion chamber
- 2626
- Auslasskanalexhaust port
Claims (17)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011121241A DE102011121241A1 (en) | 2011-12-14 | 2011-12-14 | Cylinder head of three-stroke combustion engine, has case valve provided to separate piston and annular spaces at first clock cycle of cylinder, positioned on piston surface at second cycle and arranged in seat at compression phase |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011121241A DE102011121241A1 (en) | 2011-12-14 | 2011-12-14 | Cylinder head of three-stroke combustion engine, has case valve provided to separate piston and annular spaces at first clock cycle of cylinder, positioned on piston surface at second cycle and arranged in seat at compression phase |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102011121241A1 true DE102011121241A1 (en) | 2013-06-20 |
Family
ID=48521946
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102011121241A Withdrawn DE102011121241A1 (en) | 2011-12-14 | 2011-12-14 | Cylinder head of three-stroke combustion engine, has case valve provided to separate piston and annular spaces at first clock cycle of cylinder, positioned on piston surface at second cycle and arranged in seat at compression phase |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102011121241A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112555022A (en) * | 2020-12-28 | 2021-03-26 | 高勇立 | Four-to-two moving cylinder two-stroke engine |
-
2011
- 2011-12-14 DE DE102011121241A patent/DE102011121241A1/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112555022A (en) * | 2020-12-28 | 2021-03-26 | 高勇立 | Four-to-two moving cylinder two-stroke engine |
CN112555022B (en) * | 2020-12-28 | 2022-04-05 | 高勇立 | Four-to-two moving cylinder two-stroke engine |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R081 | Change of applicant/patentee |
Owner name: OBERZOM S.A., LU Free format text: FORMER OWNER: KATHMANN, PETER BERNHARD, LUXEMBOURG, LU |
|
R082 | Change of representative | ||
R005 | Application deemed withdrawn due to failure to request examination |