DE898827C - Oval internal combustion engine piston, in particular light metal piston - Google Patents
Oval internal combustion engine piston, in particular light metal pistonInfo
- Publication number
- DE898827C DE898827C DEM9802A DEM0009802A DE898827C DE 898827 C DE898827 C DE 898827C DE M9802 A DEM9802 A DE M9802A DE M0009802 A DEM0009802 A DE M0009802A DE 898827 C DE898827 C DE 898827C
- Authority
- DE
- Germany
- Prior art keywords
- piston
- combustion engine
- internal combustion
- light metal
- particular light
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/06—Arrangements for cooling pistons
- F01P3/08—Cooling of piston exterior only, e.g. by jets
-
- 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
- F02F3/00—Pistons
- F02F3/02—Pistons having means for accommodating or controlling heat expansion
- F02F3/022—Pistons having means for accommodating or controlling heat expansion the pistons having an oval circumference or non-cylindrical shaped skirts, e.g. oval
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
Die Erfindung betrifft einen ovalen, insbesondere aus Leichtmetall bestehenden Brennkraftmaschinenkolben mit längs geschlitzten und durch Querschlitze gegenüber dem Kolbenkopf beweglich gemachten Manteltragflächen sowie mit in dem längs geschlitzten Mantelteil .derart eingebetteten (z. B. eingegossenen) gelenkbildenden Elementen mit kreisrundem Querschnitt, daß - deren Außenfläche sich formschlüssig in den Mantel einfügt.The invention relates to an oval, in particular made of light metal existing internal combustion engine pistons with longitudinally slotted and transverse slits with respect to the piston head made movable lateral support surfaces as well as in the Longitudinally slotted casing part embedded in this way (e.g. cast-in) joint-forming Elements with a circular cross-section that - the outer surface of which is form-fitting inserts into the coat.
Bei einer bekannten derartigen Kolbenausführung bestehen die gelenkbildenden Elemente aus geschlitzten Hülsen, welche als Spreizfedern wirken, die die geschlitzten Mantelteile abstützen und am Einfallen verhindern.In a known piston design of this type, the joint-forming ones exist Elements made of slotted sleeves, which act as expanding springs, which the slotted Support shell parts and prevent them from collapsing.
Der Erfindung liegt die Erkenntnis zugrunde, daß eine elastische Abstützung schon durch die Gelenkwirkung solcher Elemente auch dann gewährleistet ist, wenn die gelenkbildenden Elemente nicht in sich selbst federnd ausgebildet sind.The invention is based on the knowledge that an elastic support the joint action of such elements also guarantees if the joint-forming elements are not inherently resilient.
Es wird daher erfindungsgemäß vorgeschlagen, die formschlüssig in dem längs geschlitzten Mantelteil eines Kolbens der eingangs beschriebenen Art eingefügten Elemente aus einer urigeschlitzten Hülse oder Walze zu bilden.It is therefore proposed according to the invention that the form-fitting in inserted into the longitudinally slotted casing part of a piston of the type described above To form elements from a traditionally slotted sleeve or roller.
In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes in Fig. i in Ansicht und in Fig. 2 im Querschnitt dargestellt.The drawing shows an embodiment of the subject matter of the invention shown in Fig. i in view and in Fig. 2 in cross section.
Es handelt sich hierbei um einen sogenannten T-iSchlitzkolben, bei dem der Mantel i vom Kopfteil 2 durch zwei Ouerschlitze 3 teilweise abgetrennt ist und bei dem außerdem die eine Tragfläche des Mantels einen Längsschlitz 4 aufweist. Im Bereich dieses Schlitzes 4 ist der Mantel i wulstartig verstärkt, und in den Wulst ist eine zylindrische Hülse 5 eingegossen.This is a so-called T-i slotted flask the jacket i is partially separated from the head part 2 by two Ouerschlitze 3 and in which, in addition, the one supporting surface of the casing has a longitudinal slot 4. In the area of this slot 4, the jacket i is reinforced in the manner of a bead, and in the A cylindrical sleeve 5 is cast in the bead.
Gegen diese Hülse stützen sich die den Längsschlitz begrenzenden Kanten schon bei Zimmertemperatur gegeneinander ab, die Wärmedehnung des Mantels kann also nicht durch entsprechende Schließung des Schlitzes kompensiert werden. Die dem Längsschlitz benachbarten Mantelteile können aber dem Gegendruck der Zylinderlaufbahn gelenkig ausweichen. Die auftretenden Kräfte wirken sich auf dem Kolbenmantel tangential, d. h. in Richtung der Bolzenachse aus und unterstützen dadurch die bei allen quer geschlitzten Kolben schon an sich vorhandene Tendenz zur vorzugsweisen Dehnung in dieser Richtung, in der sie wegen der vorgesehenen Schaftovalität unschädlich ist. Infolgedessen ist es möglich, in der. quer zur Bolzenachse gerichteten Durchmesserebene noch wesentlich kleinere Einbauspiele vorzusehen als bei allen vorbekannten Schlitzmantelkolbenbauarten.The edges delimiting the longitudinal slot are supported against this sleeve already at room temperature against each other, so the thermal expansion of the jacket can cannot be compensated for by closing the slot accordingly. The one in the longitudinal slot adjacent shell parts can, however, be articulated to the counterpressure of the cylinder liner evade. The forces that occur act tangentially on the piston skirt, d. H. in the direction of the bolt axis and thereby support the transversal slotted piston already has a tendency towards preferential elongation in this direction, in which it is harmless due to the intended ovality of the shaft. As a result, it is possible in the. Diameter plane directed transversely to the bolt axis still provide significantly smaller installation clearances than with all known slotted jacket piston designs.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM9802A DE898827C (en) | 1951-06-08 | 1951-06-08 | Oval internal combustion engine piston, in particular light metal piston |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM9802A DE898827C (en) | 1951-06-08 | 1951-06-08 | Oval internal combustion engine piston, in particular light metal piston |
Publications (1)
Publication Number | Publication Date |
---|---|
DE898827C true DE898827C (en) | 1953-12-03 |
Family
ID=7294854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM9802A Expired DE898827C (en) | 1951-06-08 | 1951-06-08 | Oval internal combustion engine piston, in particular light metal piston |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE898827C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011042264A1 (en) * | 2009-10-07 | 2011-04-14 | Federal-Mogul Nürnberg GmbH | Piston for an internal combustion engine, and internal combustion engine having a piston |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2167287A (en) * | 1934-02-10 | 1939-07-25 | Leon A Witter | Piston skirt expander |
US2218737A (en) * | 1939-04-03 | 1940-10-22 | Hastings Mfg Co | Piston skirt expander |
DE863273C (en) * | 1951-03-13 | 1953-01-15 | Mahle Kg | Internal combustion engine pistons made of light metal |
-
1951
- 1951-06-08 DE DEM9802A patent/DE898827C/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2167287A (en) * | 1934-02-10 | 1939-07-25 | Leon A Witter | Piston skirt expander |
US2218737A (en) * | 1939-04-03 | 1940-10-22 | Hastings Mfg Co | Piston skirt expander |
DE863273C (en) * | 1951-03-13 | 1953-01-15 | Mahle Kg | Internal combustion engine pistons made of light metal |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011042264A1 (en) * | 2009-10-07 | 2011-04-14 | Federal-Mogul Nürnberg GmbH | Piston for an internal combustion engine, and internal combustion engine having a piston |
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