CH239276A - Cylinder in air-cooled internal combustion engines. - Google Patents
Cylinder in air-cooled internal combustion engines.Info
- Publication number
- CH239276A CH239276A CH239276DA CH239276A CH 239276 A CH239276 A CH 239276A CH 239276D A CH239276D A CH 239276DA CH 239276 A CH239276 A CH 239276A
- Authority
- CH
- Switzerland
- Prior art keywords
- cylinder
- air
- internal combustion
- combustion engines
- cooling fins
- Prior art date
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
Zylinder bei luftgekühlten Brennkraftmaschinen. Bei querluftgekühlten Brennkraftmaschi- nen sind die mit Kühlrippen versehenen Zy linder einem Luftstrom ausgesetzt, der von einer Seite der Zylinder kommt, zwischen diesen auf die andere Motorseite hindurch gedrückt wird, erhitzt abgeht. Infolge dieser einseitigen Bestreichung der Zylinder mit Kühlluft werden diese nicht allseitig gleich mässig gekühlt und dehnen sich ungleich mässig aus, was zu vorzeitigem Verschleiss führt.
Gemäss der vorliegenden Erfindung wird dieser Nachteil dadurch vermindert, dass an der dem Kühlluftstrom nicht unmittelbar ausgesetzten Zylinderseite eine grössere Kühl fläche durch Verbreiterung der Kühlrippen und ausserdem eine grössere Wandstärke vor gesehen sind. Die Erfindung kann z. B. in der Weise ausgeführt sein, dass die Kühl rippen exzentrisch zur Zylinderaussenseite angeordnet sind, die ihrerseits vorzugsweise in gleichem Sinne exzentrisch zur Zylinder bohrung ist. In der Zeichnung ist in schematischer Weise ein Ausführungsbeispiel der Erfin dung veranschaulicht.
Es zeigen: Fig. 1 einen Querschnitt eines Zylinders längs der Linie I-I der Fig. 2 und Fig. 2 einen Längsschnitt längs der Linie II-II der Fig. 1.
Bei dem dargestellten Ausführungsbei spiel verläuft die kreiszylindrische Aussen wand 3 des Zylinders 1 etwas exzentrisch zur Bohrung 2, und die Rippen 4 von kreis förmigem Umfang weisen eine gleichgerich tete, aber noch grössere Exzentrizität zur Zy linderbohrung 2 auf.
Zweck dieser Anordnung ist, auf der in bezug auf den Kühlluftstrom hintern Seite durch die stärkere Wand mit grosser Wärme leitungsfähigkeit der dort grösseren Kühl fläche der Rippen eine grössere Wärmemenge zuzuführen als zur vordern, dem Luftstrom direkt entgegenstehenden Wand mit kleinerer Rippenfläche. Dadurch wird ermöglicht, dass sowohl die Vorder- als auch_ die Hinterwand des Zylinders an die Kühlluft annähernd gleiche Wärmemengen abgeben und ihre Temperatur sowie ihre Ausdehnung Bleich bleiben.
Der gezeichnete Zylinder lässt nicht nur ein leichtes Abgiessen, sondern auch die Be arbeitung des Zylindermantels aus einem Crussrohr von dem diesem entsprechendem <B>;</B> a ssern Durchmesser durch Drehen zu.
Cylinder in air-cooled internal combustion engines. In the case of internal combustion engines with cross-air cooling, the cylinders provided with cooling ribs are exposed to an air flow that comes from one side of the cylinder, is pressed between them to the other side of the engine, and exits heated. As a result of this one-sided coating of the cylinders with cooling air, they are not evenly cooled on all sides and expand unevenly, which leads to premature wear.
According to the present invention, this disadvantage is reduced in that on the cylinder side not directly exposed to the cooling air flow, a larger cooling surface is provided by widening the cooling ribs and also a larger wall thickness. The invention can e.g. B. be designed in such a way that the cooling ribs are arranged eccentrically to the cylinder outside, which in turn is preferably eccentric to the cylinder bore in the same sense. In the drawing, an embodiment of the inven tion is illustrated in a schematic manner.
1 shows a cross section of a cylinder along the line I-I in FIG. 2 and FIG. 2 shows a longitudinal section along the line II-II in FIG.
In the illustrated Ausführungsbei game, the circular cylindrical outer wall 3 of the cylinder 1 is somewhat eccentric to the bore 2, and the ribs 4 of circular circumference have a rectified, but even greater eccentricity to the cylinder bore 2 Zy.
The purpose of this arrangement is to supply a greater amount of heat on the rear side with respect to the cooling air flow through the thicker wall with high thermal conductivity of the larger cooling surface of the ribs than to the front wall with a smaller rib surface directly opposite the air flow. This enables both the front and the rear wall of the cylinder to give off approximately the same amount of heat to the cooling air and that their temperature and their expansion remain pale.
The cylinder shown allows not only easy pouring, but also the machining of the cylinder jacket from a Cruss tube of the corresponding diameter by turning.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE239276X | 1942-12-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH239276A true CH239276A (en) | 1945-09-30 |
Family
ID=5903819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH239276D CH239276A (en) | 1942-12-08 | 1943-11-13 | Cylinder in air-cooled internal combustion engines. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH239276A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE968358C (en) * | 1951-07-15 | 1958-02-06 | Anton Heinrich Alt | Cylinder for air-cooled internal combustion engines |
DE1030621B (en) * | 1955-03-03 | 1958-05-22 | Motorenfabrik Darmstadt G M B | Cylinder for air-cooled internal combustion engines |
DE1193306B (en) * | 1959-05-08 | 1965-05-20 | Kloeckner Humbodlt Deutz Ag | Cylinder for air-cooled internal combustion engines |
-
1943
- 1943-11-13 CH CH239276D patent/CH239276A/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE968358C (en) * | 1951-07-15 | 1958-02-06 | Anton Heinrich Alt | Cylinder for air-cooled internal combustion engines |
DE1030621B (en) * | 1955-03-03 | 1958-05-22 | Motorenfabrik Darmstadt G M B | Cylinder for air-cooled internal combustion engines |
DE1193306B (en) * | 1959-05-08 | 1965-05-20 | Kloeckner Humbodlt Deutz Ag | Cylinder for air-cooled internal combustion engines |
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