DE1055292B - Two-stroke engine, especially a small engine, the piston and cylinder of which are made of light metal - Google Patents
Two-stroke engine, especially a small engine, the piston and cylinder of which are made of light metalInfo
- Publication number
- DE1055292B DE1055292B DEZ6216A DEZ0006216A DE1055292B DE 1055292 B DE1055292 B DE 1055292B DE Z6216 A DEZ6216 A DE Z6216A DE Z0006216 A DEZ0006216 A DE Z0006216A DE 1055292 B DE1055292 B DE 1055292B
- Authority
- DE
- Germany
- Prior art keywords
- piston
- cylinder
- engine
- light metal
- layer
- 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
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/02—Surface coverings of combustion-gas-swept parts
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0403—Refractory metals, e.g. V, W
- F05C2201/0406—Chromium
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electroplating Methods And Accessories (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
Zweitaktmotor, insbesondere Kleinmotor, dessen Kolben und Zylinder aus Leichtmetall bestehen Die Aufgabe der Erfindung ist es, einen Motor zu schaffen, der gute Laufeigenschaften besitzt, dessen Reibungsverluste also auf ein Minimum beschränkt sind und dessen Standfestigkeit gegenüber den bekannten Motoren erhöht wird.Two-stroke engine, especially a small engine, its pistons and cylinders consist of light metal The object of the invention is to create a motor, which has good running properties, so its friction losses are kept to a minimum are limited and its stability increased compared to the known engines will.
Es sind schon verschiedene Maßnahmen getroffen worden, um dieses Ziel zu erreichen. Es wurde z. B. die Lauffläche des Zylinders mit einer hart verchromten Schicht überzogen, um einen frühzeitigen Verschleiß des Zylinders zu verhindern. Diese verchromte Lauffläche hat aber den Nachteil, daß sie den Schmierfilm nicht festhält und dadurch der Kolben Neigung zum Klemmen zeigte. Zur Beseitigung dieses Nachteiles wurde die verchromte Lauffläche mit Vertiefungen versehen, z. B. gekordelt, damit sich das Öl in den mechanisch hergestellten Vertiefungen besser halten konnte. Das Herstellen dieser Vertiefungen erfordert aber zusätzliche Arbeitsgänge, die die Herstellung des Motors verteuern.Various measures have already been taken to achieve this goal to reach. It was z. B. the running surface of the cylinder with a hard chrome-plated Coated to prevent premature cylinder wear. However, this chrome-plated running surface has the disadvantage that it does not have the lubricating film and thereby the piston showed a tendency to jam. To eliminate this The disadvantage was the chrome-plated tread with depressions, z. B. corded, so that the oil could hold better in the mechanically produced depressions. However, the production of these wells requires additional operations make the engine more expensive.
Weiterhin besteht ein Nachteil darin, daß die Kanten der Vertiefungen durch die wärme des Motors zum Springen neigen und die abgesprungenen hart verchromten Teile zwischen Zylinderlauffläche und Kolbenlauffläche gelangen, wodurch Vertiefungen, wie z. B. Rillen, an der Kolbenlauffläche hervorgerufen werden. Die Laufsicherheit des Kolbens wird also beeinträchtigt.Furthermore, there is a disadvantage that the edges of the depressions Tend to jump due to the heat of the engine and the hard chrome-plated ones that have jumped off Parts get between the cylinder running surface and the piston running surface, causing depressions, such as B. grooves, are caused on the piston running surface. The running safety of the piston is thus impaired.
Man hat auch bei Viertaktmotoren, deren Zylinder aus Gußeisen bestanden, die Kolbenböden aus thermischen Gründen eloxiert. Weiterhin wurde vorgeschlagen, den Zylinder oder den Kolben, insbesondere den ersten, mit einer Schicht aus reinem Aluminium, Graphit, Zinn od. dgl. zu überziehen, um die gewünschte gute Gleitfähigkeit des Kolbens zu erreichen. Die mit diesem Maßnahmen hergestellten Motoren entsprachen aber nicht den gestellten Anforderungen.In four-stroke engines, the cylinders of which were made of cast iron, the piston crowns anodized for thermal reasons. It was also suggested that the cylinder or the piston, especially the first, with a layer of pure Aluminum, graphite, tin or the like to be coated in order to achieve the desired good sliding properties to achieve the piston. The engines manufactured with this measure corresponded but not the requirements.
Man kennt ferner Leichtmetallkolben, die mit einer künstlich erzeugten Oxydschicht, d. h. einer Eloxalschicht, zwecks Erhöhung der Aufnahmefähigkeit der Schmierstoffe ausgebildet sind.One also knows light metal pistons that are artificially produced with an Oxide layer, d. H. an anodized layer to increase the absorption capacity of the Lubricants are formed.
Demgegenüber besteht die Erfindung in der Vereinigung folgender, je für sich bekannter Merkmale, nämlich, daß einerseits die Kolbenlaufbahn eine Eloxalschicht aufweist und daß andererseits die Zylinderlauffläche mit einer Chromschicht, vorzugsweise einer Hartchromschicht, versehen ist. Diese beiden Merkmale wirken in einer sehr vorteilhaften Weise zusammen. Die Chromschicht an der Zylinderlauffläche gibt dem Zylinder eine hohe Verschleißfestigkeit. Der Nachteil einer solchen verchromten Lauffläche, daß sie den Schmierfilm nicht festhält, wird jedoch ausgeglichen durch die gute Aufnahmefähigkeit des mit einer Eloxalschicht versehenen Kolbens. Es hat sich gezeigt, daß derartige Motoren den Anforderungen der Praxis vollauf Genüge tun und dabei sehr verschleißfest sind.In contrast, the invention consists in the union of the following, each features known per se, namely that on the one hand the piston raceway is an anodized layer and that on the other hand the cylinder surface with a chrome layer, preferably a hard chrome layer is provided. These two characteristics work in a very great way beneficial way together. The chrome layer on the cylinder surface gives that Cylinder high wear resistance. The disadvantage of such a chrome-plated Tread that it does not hold the lubricating film, however, is compensated by the good absorption capacity of the piston, which is provided with an anodized layer. It has It has been shown that such motors fully meet the requirements of practice do and are very wear-resistant.
Das Herstellen von Vertiefungen in der verchromten Lauffläche des Zylinders entfällt, da die Eloxalschicht am Kolben den Schmierstoff genügend aufnimmt, und zwar auch den Öldunst, der im Kraftstoffgemisch eines Zweitaktmotors enthalten ist. Es werden also die insbesondere der Reibung ausgesetzten Kolbenflächen besonders intensiv mit Schmierstoff versorgt.The creation of indentations in the chrome-plated running surface of the Cylinder is omitted because the anodized layer on the piston absorbs the lubricant sufficiently, including the oil vapor contained in the fuel mixture of a two-stroke engine is. The piston surfaces that are particularly exposed to friction are therefore special intensively supplied with lubricant.
Somit werden die Laufeigenschaften und auch die Lebensdauer eines derartigen Motors verbessert.Thus, the running properties and also the service life of a such a motor improved.
Die Erfindung betrifft in erster Linie schnelllaufende Kleinmotoren, wie sie für Mopeds, Kleinkrafträder, Außenbordmotoren, stationäre Motoren usw. Verwendung finden. Die Vorteile der Erfindung einschließlich des Vorteils der größeren Härte der Eloxalschicht gegenüber den bekannten aus Leichtmetall bestehenden Kolben, wirken sich insbesondere günstig aus bei einem Leichtmetallzylinder mit einer hart verchromten Lauffläche.The invention relates primarily to high-speed small motors, as used for mopeds, mopeds, outboard motors, stationary motors, etc. Find. The advantages of the invention including the advantage of greater hardness the anodized layer compared to the known pistons made of light metal act is particularly advantageous in the case of a light metal cylinder with a hard chrome-plated one Tread.
In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes dargestellt.The drawing shows an exemplary embodiment of the subject matter of the invention shown.
Die Lauffläche 1 eines aus Leichtmetall bestehenden Zylinders 2 eines luftgekühlten Zweitaktmotors ist hart verchromt. Der darin befindliche Kolben 3 ist an seiner Lauffläche mit einer Eloxalschicht 4 versehen. Eine gleiche Eloxalschicht 5 kann an den Lagerstellen im Kolben vorgesehen sein, die zur Aufnahme des Kolbenbolzens 6 dienen. Auf dem Kolbenbolzen ist ein Pleuel 7 gelagert.The running surface 1 of a cylinder 2 made of light metal air-cooled two-stroke engine is hard chrome plated. The piston 3 inside is provided with an anodized layer 4 on its running surface. The same anodized layer 5 can be provided at the bearings in the piston that are used to accommodate the Piston pin 6 serve. A connecting rod 7 is mounted on the piston pin.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEZ6216A DE1055292B (en) | 1957-07-24 | 1957-07-24 | Two-stroke engine, especially a small engine, the piston and cylinder of which are made of light metal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEZ6216A DE1055292B (en) | 1957-07-24 | 1957-07-24 | Two-stroke engine, especially a small engine, the piston and cylinder of which are made of light metal |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1055292B true DE1055292B (en) | 1959-04-16 |
Family
ID=7619688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEZ6216A Pending DE1055292B (en) | 1957-07-24 | 1957-07-24 | Two-stroke engine, especially a small engine, the piston and cylinder of which are made of light metal |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1055292B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988008926A1 (en) * | 1987-05-08 | 1988-11-17 | Oktan Ab | Provision for the combustion chamber surfaces of an internal combustion engine |
DE3812479A1 (en) * | 1988-04-15 | 1989-10-26 | Martin Ziegler | Piston for an internal combustion engine |
DE102006039679A1 (en) * | 2006-08-24 | 2008-02-28 | Audi Ag | Method for processing cylinder bearing surface of cylinder crankcase/cylinder sockets out of matrix existing from light metal with embedded hard material phase, by mechanically processing the bearing surface to put freely the material phase |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE538879C (en) * | 1930-10-19 | 1931-11-17 | Ver Aluminium Werke Akt Ges | Process for the production of surfaces that are resistant to sliding friction |
US2036740A (en) * | 1932-10-06 | 1936-04-07 | Aluminum Co Of America | Coated aluminum piston |
-
1957
- 1957-07-24 DE DEZ6216A patent/DE1055292B/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE538879C (en) * | 1930-10-19 | 1931-11-17 | Ver Aluminium Werke Akt Ges | Process for the production of surfaces that are resistant to sliding friction |
US2036740A (en) * | 1932-10-06 | 1936-04-07 | Aluminum Co Of America | Coated aluminum piston |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988008926A1 (en) * | 1987-05-08 | 1988-11-17 | Oktan Ab | Provision for the combustion chamber surfaces of an internal combustion engine |
US4941439A (en) * | 1987-05-08 | 1990-07-17 | Oktan Ab | Combustion chamber surfaces of an internal combustion engine |
DE3812479A1 (en) * | 1988-04-15 | 1989-10-26 | Martin Ziegler | Piston for an internal combustion engine |
DE102006039679A1 (en) * | 2006-08-24 | 2008-02-28 | Audi Ag | Method for processing cylinder bearing surface of cylinder crankcase/cylinder sockets out of matrix existing from light metal with embedded hard material phase, by mechanically processing the bearing surface to put freely the material phase |
DE102006039679B4 (en) * | 2006-08-24 | 2011-02-10 | Audi Ag | Method for machining cylinder running surfaces of a cylinder crankcase or cylinder liners |
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