CH209214A - Internal combustion piston machine with compression of an air charge, in particular for fuel in the form of dust. - Google Patents
Internal combustion piston machine with compression of an air charge, in particular for fuel in the form of dust.Info
- Publication number
- CH209214A CH209214A CH209214DA CH209214A CH 209214 A CH209214 A CH 209214A CH 209214D A CH209214D A CH 209214DA CH 209214 A CH209214 A CH 209214A
- Authority
- CH
- Switzerland
- Prior art keywords
- piston
- dust
- fuel
- internal combustion
- annular
- Prior art date
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 16
- 230000006835 compression Effects 0.000 title claims description 9
- 238000007906 compression Methods 0.000 title claims description 9
- 239000000446 fuel Substances 0.000 title claims description 6
- 239000000428 dust Substances 0.000 title claims description 5
- 238000005056 compaction Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
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
- F02B45/00—Engines characterised by operating on non-liquid fuels other than gas; Plants including such engines
- F02B45/02—Engines characterised by operating on non-liquid fuels other than gas; Plants including such engines operating on powdered fuel, e.g. powdered coal
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Description
Br ennkraftkolbenmaschine mit Verdichtung einer Luftladung, insbesondere für staubförmige Brennstoffe. Die Erfindung bezieht sich auf eine Brennkraftkolbenmaschine mit Verdichtung einer Luftladung, insbesondere für staubför mige Brennstoffe.
Erfindungsgemäss werden am Ende des Verdiahtungshubess zwischen Kolbenboden und Zylinderdeckel ein oder mehrere Ringräume vom Brennraum ab getrennt, welche :diesen umschliessen. Am Ende des Verdichtungshubes ist die Verbin dung zwischen dem zweckmässig möglichst weit aussen angelegten Ringraum und dem Brennraum nahezu aufgehoben.
Beim Ab- #,värt3gang ,des Kolbens dehnt sich die in :dem Ringraum verdichtete Luft gegen :die Zy- lindera.xe aus, fängt das in dem Brennraum befindliche, sich ausdehnende Brenngemis:
ah auf und bringt es durch Gegenströmung zum ,Stillstand. Es wird hierdurch verhütet, dass das Brenngemisch gleich zu Beginn des Deh nungshubes mit der Zylinderwand in Berüh rung kommt. Dies- Wirkung ist bei Brenn- staubmotoren von besonderer Bedeutung, da der :Staub nach Möglichkeit nioht an :die Zy linderwand gelangen darf, um eine Verbin dung mit d:em ;Schmieröl zu verhindern.
Bei einer erfindungsgemäss ausgebildeten Brennkraftmaschine füx staubförmige Brenn stoffe wird so zu Beginn ,
des Dehnungshubes der während der Verbrennung gegen die Zy linderwand geworfene Staub durch die aus dem Ringraum austretende Luft aufgehalten und gegen die Zylindermitte zurückgeblasen. Gleichzeitig wird dem aus der Vorkammer austretenden Brenngemisch aus dem Ring raum ein zweites Mal heisse, hochkompri- mierte und sauerstoffreiche Luft auf grosser Fläche verteilt entgegengeworfen,
so dass hierdurch die restlose Verbrennung sehr ge fördert wird.
Der Ringraum kann zum Beispiel dureh einander gegenüberliegende ausgerundete Rinbgnuten des Kolbenbodens und Zylinder- deekels gebildet ,sein und ein ringförmiger Vorsprung auf der innern Seite der im Zy linderdeckel vorgesehenen Ringnut kann bei der innern Beti enzungskante der im Kolben boden vorgesehenen Ringnut in letztere hin einragen. Durch diese Ausbildung des Ring raumes wird beim Verdichtungshub eine Wirbelung innerhalb des Ringraumes erzielt, wodurch die Sperrwirkung der in dem Ring raum befindlichen Luft. noch erhöht wird.
In der Zeichnung ist ein Ausführungsbei- spiel des Erfindungsgegenstandes schema tisch dargestellt.
Der Kolben 1 besitzt an seinem Boden eine ringförmige abgerundete Nut ? und in der Mitte eine Mulde 3, in die am Ende des Verdichtungshubes eine Vorkammer 4 hin einragt. In dem Zylinderdeckel 5 ist gleich falls eine Ringnut 6 angeordnet und auf der innern .Seite dieser Nut ein ringförmiger Vorsprung 7, der bei der innern Begrenzungs kante 8 der im Kolben 1 befindlichen Ring nut 2 in diese hineinragt.
Die Ringnuten 6 und 2 bilden am Ende des Verdichtungshubes einen Ringraum 9, in dem sich verdichtete Luft befindet. Beim Abwärtsgan:g des Kolbens 1 strömt die in dem Ringraum 9 befindliche verdichtete Luft wirbelnd über den Vorsprung 7 und die innere @egrenzunbskante 8 hinweg zur Mitte des Zylinderraumes und hält durch Gegen- strömung das Brenngemisch von der Zy- linderwand fern.
Auch bei Maschinen mit Luftspeiclier- räumen und bei Dieselmaschinen anderer Ausführungsart ist die Erfindung mit Er folg anwendbar, auch dann, wenn der Kolben boden einen zum Beispiel kegelförmigen Ver- drängeransatz besitzt.
Es können auch mehrere konzentrische Ringräume angeordnet werden. Der Ring raum kann allein durch eine entsprechende Ausnehmung im Kolben oder im Zylinder deckel gebildet werden.
Internal combustion piston machine with compression of an air charge, in particular for fuel in the form of dust. The invention relates to an internal combustion piston engine with compression of an air charge, in particular for staubför shaped fuels.
According to the invention, at the end of the twisting stroke between the piston crown and the cylinder cover, one or more annular spaces are separated from the combustion chamber, which: enclose it. At the end of the compression stroke, the connection between the annular space, which is expediently placed as far outside as possible, and the combustion chamber is almost eliminated.
When the piston goes down, the air compressed in the annular space expands against: the cylinder.xe, catches the expanding fuel in the combustion chamber:
ah and brings it to a standstill by countercurrent. This prevents the combustion mixture from coming into contact with the cylinder wall right at the beginning of the expansion stroke. This effect is of particular importance in the case of internal combustion engines, since the: Dust, if possible, is not allowed to reach the cylinder wall in order to prevent a connection with the lubricating oil.
In an internal combustion engine designed according to the invention for dust-like fuel, at the beginning
of the expansion stroke, the dust thrown against the cylinder wall during combustion is held up by the air emerging from the annular space and blown back towards the center of the cylinder. At the same time, hot, highly compressed and oxygen-rich air is thrown a second time against the combustion mixture emerging from the antechamber from the annulus, distributed over a large area,
so that the complete combustion is greatly promoted.
The annular space can, for example, be formed by opposing rounded grooves of the piston crown and cylinder cover, and an annular projection on the inside of the annular groove provided in the cylinder cover can protrude into the latter at the inner operating edge of the annular groove provided in the piston crown. Through this formation of the annular space, a vortex is achieved within the annular space during the compression stroke, whereby the blocking effect of the air in the annular space. is still increased.
An exemplary embodiment of the subject matter of the invention is shown schematically in the drawing.
The piston 1 has an annular rounded groove at its bottom? and in the middle a trough 3 into which an antechamber 4 protrudes at the end of the compression stroke. In the cylinder cover 5 an annular groove 6 is also arranged and on the inside .Side of this groove an annular projection 7, which protrudes at the inner boundary edge 8 of the ring groove 2 located in the piston 1 into this.
At the end of the compression stroke, the annular grooves 6 and 2 form an annular space 9 in which there is compressed air. On the downward movement of the piston 1, the compressed air in the annular space 9 flows in a swirling manner over the projection 7 and the inner boundary edge 8 to the center of the cylinder space and keeps the combustion mixture away from the cylinder wall by means of a counterflow.
The invention can also be used successfully in machines with air storage spaces and in diesel machines of other types, even when the piston head has a conical displacement attachment, for example.
Several concentric annular spaces can also be arranged. The ring space can be formed solely by a corresponding recess in the piston or in the cylinder cover.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE209214X | 1938-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH209214A true CH209214A (en) | 1940-03-31 |
Family
ID=5794654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH209214D CH209214A (en) | 1938-02-22 | 1938-11-26 | Internal combustion piston machine with compression of an air charge, in particular for fuel in the form of dust. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH209214A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE938102C (en) * | 1951-04-06 | 1956-01-19 | Daimler Benz Ag | Diesel engine with an antechamber |
| US2761431A (en) * | 1950-02-22 | 1956-09-04 | Daimler Benz Ag | Injection type internal combustion engine with precombustion chamber |
| US2804858A (en) * | 1952-09-04 | 1957-09-03 | Daimler Benz Ag | Precombustion diesel engine |
-
1938
- 1938-11-26 CH CH209214D patent/CH209214A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2761431A (en) * | 1950-02-22 | 1956-09-04 | Daimler Benz Ag | Injection type internal combustion engine with precombustion chamber |
| DE938102C (en) * | 1951-04-06 | 1956-01-19 | Daimler Benz Ag | Diesel engine with an antechamber |
| US2804858A (en) * | 1952-09-04 | 1957-09-03 | Daimler Benz Ag | Precombustion diesel engine |
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