WO2015074760A1 - Ring support for a piston of an internal combustion engine, and piston for an internal combustion engine - Google Patents

Ring support for a piston of an internal combustion engine, and piston for an internal combustion engine Download PDF

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Publication number
WO2015074760A1
WO2015074760A1 PCT/EP2014/003107 EP2014003107W WO2015074760A1 WO 2015074760 A1 WO2015074760 A1 WO 2015074760A1 EP 2014003107 W EP2014003107 W EP 2014003107W WO 2015074760 A1 WO2015074760 A1 WO 2015074760A1
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WO
WIPO (PCT)
Prior art keywords
cooling channel
ring carrier
piston
air outlet
channel part
Prior art date
Application number
PCT/EP2014/003107
Other languages
German (de)
French (fr)
Inventor
Ulrich Bischofberger
Stefan Gaiselmann
Original Assignee
Mahle International Gmbh
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Publication date
Application filed by Mahle International Gmbh filed Critical Mahle International Gmbh
Publication of WO2015074760A1 publication Critical patent/WO2015074760A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/09—Pistons; Trunk pistons; Plungers with means for guiding fluids
    • 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 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • 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 
    • F02F3/0015—Multi-part pistons

Definitions

  • the present invention relates to a ring carrier for a piston of an internal combustion engine having a ring carrier part and a cooling channel part which is fixedly connected to the ring carrier part and forms a closed cooling channel together with the ring carrier part.
  • the present invention further relates to a piston with such a ring carrier.
  • a generic ring carrier is known from DE 100 57 366 AI.
  • the ring carrier part usually consists of an austenitic cast iron with lamellar graphite. These materials are also known under the name NiResist.
  • the cooling duct part generally consists of a steel sheet, for example of a V2A steel. The cooling channel part is welded in a manner known per se and, as described in DE 100 57 366 A1, to the ring carrier part.
  • Such a ring carrier is inserted before the casting of a piston for an internal combustion engine in the mold and surrounded with the casting material.
  • the ring carrier When manufacturing aluminum alloy pistons, the ring carrier must be treated in advance to form a bonding layer between the ring carrier materials and the piston material.
  • the ring carrier is affiniert in known manner, i. E. in a so-called Alfin bath, for example, immersed in an aluminum-silicon melt.
  • Alfin bath for example, immersed in an aluminum-silicon melt.
  • a so-called, consisting of iron aluminides Alfin layer forms on the ring carrier.
  • This Alfin Wein represents the desired bonding layer between the piston material and the ring carrier materials.
  • CONFIRMATION COPY of oxide skins on the ring carrier part which adhere to the cooling of the ring carrier at this and represent defects in the ring carrier bond on the finished piston.
  • DE 100 57 366 A1 proposes to solve this problem, to pressurize the cooling channel before Alfinieren in an evacuated vacuum vessel over a period of at least 24 hours with negative pressure.
  • the cooling channel is evacuated at least to such an extent that the high temperatures acting on the ring carrier when Alfinieren no longer lead to an overpressure in the cooling channel, so that no air can escape through the ring carrier part.
  • the evacuation of the cooling channel is not only very complex and costly, but that the ring carrier must be very quickly alfi- ned after evacuation and poured into the piston. Since this can not always be optimally realized, the ring carrier is additionally stored under reduced pressure, which further complicates the processing. Furthermore, care must be taken that the cooling channel part is welded in a gas-tight manner to the ring carrier part in order to prevent ambient air from flowing into the cooling channel during the evacuation.
  • the object of the present invention is to provide a generic ring carrier that can be further processed in the simplest possible way, in particular can be poured into a piston for an internal combustion engine while avoiding defects in the ring carrier bond.
  • the object of the present invention is further to provide a piston with such a ring carrier.
  • the cooling channel part is provided with at least one air outlet opening with a diameter of 0.5 mm maximum.
  • the subject of the present patent application is also a piston with a ring carrier according to the invention. It has been found that during the Alfinierens trapped in the cooling duct air escapes through the at least one air outlet opening, while the aluminum-based material of the Alfin bath can not penetrate through the air outlet openings in the cooling channel due to its viscosity. It is assumed that the oxygen content of the escaping air reacts with the aluminum material outside the ring carrier and forms an oxide skin, which reliably prevents the inflow of the alfin bath into the cooling channel.
  • the further processing of the ring carrier according to the invention is decisively simplified, namely by eliminating both the evacuation of the cooling channel and the storage of the ring carrier under negative pressure and the time pressure for Alfinieren and pouring.
  • the ring carrier according to the invention can be further processed at any time interval for its production.
  • the at least one opening opening provided according to the invention is expediently introduced into the ring carrier part before the ring carrier part and the cooling channel part are connected. This can be done, for example, in a conventional manner by means of a pulsed laser beam. Subsequently, the ring carrier part is welded in a known manner with the cooling channel part.
  • the at least one air outlet opening expediently has a diameter of not more than 0.1 mm, depending on the viscosity of the particular Alfin bath used.
  • the cooling passage part can be provided in the cooling passage part exactly one air outlet opening.
  • a plurality of air outlet openings can be provided in the cooling channel part, which can expediently be distributed uniformly over the cooling channel part and preferably have a small diameter, in particular of not more than 0.1 mm. This reliably prevents even materials of a low-viscosity Alfin bath from entering the cooling channel can penetrate and at the same time the majority of the air contained in the cooling channel during Alfinierens can escape from the cooling channel.
  • the diameter of the air outlet openings is preferably dimensioned according to the total cross-sectional area formed thereby, which is required in order to allow the majority of the air contained in the cooling channel to emerge from the cooling channel during alfinishing.
  • the material of the cooling passage part preferably has a maximum thickness of 0.8 mm, as is customary, for example, for pistons for commercial vehicles.
  • the material of the cooling channel part has a thickness of 0.3 mm to 0.4 mm, as is customary, for example, for passenger car pistons.
  • Figure 1 shows a first embodiment of a ring carrier according to the invention
  • Figure 2 shows another embodiment of a ring carrier according to the invention
  • Figure 3 is an enlarged detail of a piston with an inventive
  • FIGS 1 and 2 show in a schematic, not to scale representation of two embodiments of a ring carrier 10, 1 according to the invention 10.
  • the ring carrier 10 according to Figure 1 has a ring carrier part 1 1 and a cooling channel part 12.
  • the ring carrier part consists in the embodiment of a NiResist material, that is, an austenitic cast iron with lamellar graphite.
  • the cooling channel part 12 consists of a V2A steel sheet and has a thickness of 0.3 mm to 0.4 mm.
  • the ring carrier part 1 1 and the cooling channel part 12 are welded together in a conventional manner, wherein the edges of the cooling channel part 12 are connected by welds 13 with the ring carrier part 1 1.
  • the cooling channel 12 has an air outlet opening 16 with a diameter of 0.1 mm maximum.
  • the air outlet opening 16 may, for example, be introduced into the cooling channel part 12 in a manner known per se with pulsed laser radiation.
  • the cooling channel member 12 has a plurality of air outlet openings 16 1, which are distributed uniformly over the cooling channel 12 in the embodiment and a maximum diameter of 0.1 mm exhibit.
  • FIG. 3 shows by way of example an enlarged section of a piston 20 with a ring carrier 10 according to the invention according to FIG. 1, which has an air outlet opening 16.
  • the piston 20 has a piston head 21 and a piston shaft 27 in a conventional manner.
  • the piston head 21 has a piston head 22 with a combustion bowl 23, a circumferential top land 24 and a peripheral ring 25 with annular grooves for receiving piston rings (not shown).
  • the uppermost annular groove 26 is formed by the ring carrier 10 according to the invention.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The invention relates to a ring support (10, 110) for a piston of an internal combustion engine, comprising a ring support part (11) and a cooling channel part (12) which is rigidly connected to the ring support part (11) and together with the ring support part (11) forms a closed cooling channel (15). According to the invention, the cooling channel part (12) is provided with at least one air outlet opening (16, 116) with a maximum diameter of 0.1 mm. The invention further relates to a piston (20) with such a ring support (10, 110).

Description

Ringträger für einen Kolben eines Verbrennungsmotors sowie Kolben für einen Verbrennungsmotor  Ring carrier for a piston of an internal combustion engine and pistons for an internal combustion engine
Beschreibung description
Die vorliegende Erfindung betrifft einen Ringträger für einen Kolben eines Verbrennungsmotors mit einem Ringträgerteil und einem Kühlkanalteil, das mit dem Ringträgerteil fest verbunden ist und zusammen mit dem Ringträgerteil einen geschlossenen Kühlkanal bildet. Die vorliegende Erfindung betrifft ferner einen Kolben mit einem derartigen Ringträger. The present invention relates to a ring carrier for a piston of an internal combustion engine having a ring carrier part and a cooling channel part which is fixedly connected to the ring carrier part and forms a closed cooling channel together with the ring carrier part. The present invention further relates to a piston with such a ring carrier.
Ein gattungsgemäßer Ringträger ist aus der DE 100 57 366 AI bekannt. Das Ringträgerteil besteht üblicherweise aus einem austenitischen Gusseisen mit Lamellengraphit. Diese Werkstoffe sind auch unter dem Namen NiResist bekannt. Das Kühlkanalteil besteht im Allgemeinen aus einem Stahlblech, bspw. aus einem V2A-Stahl. Das Kühlkanalteil ist in an sich bekannter Weise und wie auch in der DE 100 57 366 A1 beschrieben mit dem Ringträgerteil verschweißt. A generic ring carrier is known from DE 100 57 366 AI. The ring carrier part usually consists of an austenitic cast iron with lamellar graphite. These materials are also known under the name NiResist. The cooling duct part generally consists of a steel sheet, for example of a V2A steel. The cooling channel part is welded in a manner known per se and, as described in DE 100 57 366 A1, to the ring carrier part.
Ein derartiger Ringträger wird vor dem Gießen eines Kolbens für einen Verbrennungsmotor in die Gießform eingelegt und mit dem Gießwerkstoff umgössen. Bei der Herstellung von Kolben aus einer Aluminiumlegierung muss der Ringträger vorher behandelt werden, damit eine Bindeschicht zwischen den Ringträgerwerkstoffen und dem Kol benwerkstoff entsteht. Hierzu wird der Ringträger in an sich bekannter Weise affiniert, d.h. in ein so genanntes Alfin-Bad, bspw. in eine Aluminium-Silizium-Schmelze getaucht. Dadurch bildet sich auf dem Ringträger eine so genannte, aus Eisenaluminiden bestehende Alfin-Schicht. Diese Alfinschicht stellt die gewünschte Bindeschicht zwischen dem Kolbenwerkstoff und den Ringträgerwerkstoffen dar. Such a ring carrier is inserted before the casting of a piston for an internal combustion engine in the mold and surrounded with the casting material. When manufacturing aluminum alloy pistons, the ring carrier must be treated in advance to form a bonding layer between the ring carrier materials and the piston material. For this purpose, the ring carrier is affiniert in known manner, i. E. in a so-called Alfin bath, for example, immersed in an aluminum-silicon melt. As a result, a so-called, consisting of iron aluminides Alfin layer forms on the ring carrier. This Alfinschicht represents the desired bonding layer between the piston material and the ring carrier materials.
Dabei hat sich gezeigt, dass aufgrund der hohen Temperatur im Alfin-Bad der Gasdruck im Kühlkanal ansteigt. Aufgrund des Überdrucks und der Gasdurchlässigkeit des NiResist- Werkstoffs kann zumindest ein Teil der im Kühlkanal eingeschlossenen Luft durch das Ringträgerteil entweichen. Der in der austretenden Luft enthaltene Luftsauerstoff führt zur Bildung It has been shown that due to the high temperature in the Alfin bath, the gas pressure in the cooling channel increases. Due to the overpressure and the gas permeability of the NiResist material, at least part of the air trapped in the cooling channel can escape through the ring carrier part. The atmospheric oxygen contained in the exiting air leads to the formation
BESTÄTIGUNGSKOPIE von Oxidhäuten auf dem Ringträgerteil, die nach dem Abkühlen des Ringträgers an diesem anhaften und am fertigen Kolben Fehlstellen in der Ringträgerbindung darstellen. CONFIRMATION COPY of oxide skins on the ring carrier part, which adhere to the cooling of the ring carrier at this and represent defects in the ring carrier bond on the finished piston.
Die DE 100 57 366 A1 schlägt zur Lösung dieses Problems vor, den Kühlkanal vor dem Alfinieren in einem evakuierbaren Unterdruckbehälter über einen Zeitraum von mindestens 24 Stunden mit Unterdruck zu beaufschlagen. Dadurch wird der Kühlkanal zumindest so weit evakuiert, dass die beim Alfinieren auf den Ringträger einwirkenden hohen Temperaturen nicht mehr zu einem Überdruck im Kühlkanal führen, so dass keine Luft mehr über das Ringträgerteil entweichen kann. DE 100 57 366 A1 proposes to solve this problem, to pressurize the cooling channel before Alfinieren in an evacuated vacuum vessel over a period of at least 24 hours with negative pressure. As a result, the cooling channel is evacuated at least to such an extent that the high temperatures acting on the ring carrier when Alfinieren no longer lead to an overpressure in the cooling channel, so that no air can escape through the ring carrier part.
In der Praxis hat sich herausgestellt, dass das Evakuieren des Kühlkanals nicht nur sehr aufwändig und kostspielig ist, sondern dass der Ringträger nach dem Evakuieren sehr zügig alfi- niert und in den Kolben eingegossen werden muss. Da dies nicht immer optimal verwirklicht werden kann, wird der Ringträger zusätzlich unter Unterdruck aufbewahrt, was die Verarbeitung noch weiter kompliziert. Ferner ist darauf zu achten, dass das Kühlkanalteil gasdicht mit dem Ringträgerteil verschweißt ist, um zu vermeiden, dass während des Evakuierens Umgebungsluft in den Kühlkanal nachströmt. In practice, it has been found that the evacuation of the cooling channel is not only very complex and costly, but that the ring carrier must be very quickly alfi- ned after evacuation and poured into the piston. Since this can not always be optimally realized, the ring carrier is additionally stored under reduced pressure, which further complicates the processing. Furthermore, care must be taken that the cooling channel part is welded in a gas-tight manner to the ring carrier part in order to prevent ambient air from flowing into the cooling channel during the evacuation.
Die Aufgabe der vorliegenden Erfindung besteht darin, einen gattungsgemäßen Ringträger bereit zu stellen, der auf möglichst einfache Weise weiterverarbeitet werden kann, insbesondere unter Vermeidung von Fehlstellen in der Ringträgerbindung in einen Kolben für einen Verbrennungsmotor eingegossen werden kann. Die Aufgabe der vorliegenden Erfindung besteht ferner darin, einen Kolben mit einem derartigen Ringträger bereitzustellen. The object of the present invention is to provide a generic ring carrier that can be further processed in the simplest possible way, in particular can be poured into a piston for an internal combustion engine while avoiding defects in the ring carrier bond. The object of the present invention is further to provide a piston with such a ring carrier.
Die Lösung besteht darin, dass das Kühlkanalteil mit mindestens einer Luftaustrittsöffnung mit einem Durchmesser von maximal 0,5 mm versehen ist. The solution is that the cooling channel part is provided with at least one air outlet opening with a diameter of 0.5 mm maximum.
Gegenstand der vorliegenden Patentanmeldung ist ferner ein Kolben mit einem erfindungsgemäßen Ringträger. Es hat sich herausgestellt, dass während des Alfinierens die im Kühlkanal eingeschlossene Luft durch die mindestens eine Luftaustrittsöffnung entweicht, während der aluminiumbasierte Werkstoff des Alfin-Bades aufgrund seiner Viskosität nicht durch die Luftaustrittsöffnungen in den Kühlkanal eindringen kann. Es wird angenommen, dass der Sauerstoffanteil der entweichenden Luft mit dem Aluminiumwerkstoff außerhalb des Ringträgers reagiert und eine Oxidhaut bildet, die das Einströmen des Alfin-Bades in den Kühlkanal zuverlässig verhindert. The subject of the present patent application is also a piston with a ring carrier according to the invention. It has been found that during the Alfinierens trapped in the cooling duct air escapes through the at least one air outlet opening, while the aluminum-based material of the Alfin bath can not penetrate through the air outlet openings in the cooling channel due to its viscosity. It is assumed that the oxygen content of the escaping air reacts with the aluminum material outside the ring carrier and forms an oxide skin, which reliably prevents the inflow of the alfin bath into the cooling channel.
Damit wird die Weiterverarbeitung des erfindungsgemäßen Ringträgers entscheidend vereinfacht, indem nämlich sowohl das Evakuieren des Kühlkanals als auch die Aufbewahrung des Ringträgers unter Unterdruck sowie der Zeitdruck zum Alfinieren und Eingießen entfallen. Der erfindungsgemäße Ringträger kann in beliebigem zeitlichem Abstand zu seiner Herstellung weiterverarbeitet werden. Thus, the further processing of the ring carrier according to the invention is decisively simplified, namely by eliminating both the evacuation of the cooling channel and the storage of the ring carrier under negative pressure and the time pressure for Alfinieren and pouring. The ring carrier according to the invention can be further processed at any time interval for its production.
Da das Ringträgerteil einfacher zu handhaben ist als der fertige Ringträger, wird die erfin- öungsgemäß vorgesehene mindestens eine iuftaustnttsöffnung zweckmäßigerweise vor dem Verbinden von Ringträgerteil und Kühlkanalteil in das Ringträgerteil eingebracht. Dies kann bspw. in an sich bekannter Weise mittels eines gepulsten Laserstrahls erfolgen. Anschließend wird das Ringträgerteil auf an sich bekannte Weise mit dem Kühlkanalteil verschweißt. Since the ring carrier part is easier to handle than the finished ring carrier, the at least one opening opening provided according to the invention is expediently introduced into the ring carrier part before the ring carrier part and the cooling channel part are connected. This can be done, for example, in a conventional manner by means of a pulsed laser beam. Subsequently, the ring carrier part is welded in a known manner with the cooling channel part.
Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen. Advantageous developments emerge from the subclaims.
Die mindestens eine Luftaustrittsöffnung weist zweckmäßigerweise einen Durchmesser von maximal 0,1 mm auf, abhängig von der Viskosität des jeweils verwendeten Alfin-Bades. The at least one air outlet opening expediently has a diameter of not more than 0.1 mm, depending on the viscosity of the particular Alfin bath used.
Es kann genau eine Luftaustrittsöffnung im Kühlkanalteil vorgesehen sein. Es können aber auch mehrere Luftaustrittsöffnungen im Kühlkanalteil vorgesehen sein, die zweckmäßigerweise gleichmäßig über das Kühlkanalteil verteilt sein können und vorzugsweise einen geringen Durchmesser, insbesondere von maximal 0,1 mm aufweisen. Dadurch wird zuverlässig verhindert, dass auch Werkstoffe eines Alfin-Bades mit geringer Viskosität nicht in den Kühlkanal eindringen können und zugleich der Großteil der im Kühlkanal enthaltenen Luft während des Alfinierens aus dem Kühlkanal austreten kann. It can be provided in the cooling passage part exactly one air outlet opening. However, it is also possible for a plurality of air outlet openings to be provided in the cooling channel part, which can expediently be distributed uniformly over the cooling channel part and preferably have a small diameter, in particular of not more than 0.1 mm. This reliably prevents even materials of a low-viscosity Alfin bath from entering the cooling channel can penetrate and at the same time the majority of the air contained in the cooling channel during Alfinierens can escape from the cooling channel.
Vorzugsweise bemisst sich der Durchmesser der Luftaustrittsöffnungen nach der hierdurch gebildeten Gesamtquerschnittsfläche, die erforderlich ist, um den Großteil der im Kühlkanal enthaltenen Luft während des Alfinierens aus dem Kühlkanal austreten zu lassen. The diameter of the air outlet openings is preferably dimensioned according to the total cross-sectional area formed thereby, which is required in order to allow the majority of the air contained in the cooling channel to emerge from the cooling channel during alfinishing.
Der Werkstoff des Kühlkanalteils weist bevorzugt eine Dicke von maximal 0,8 mm auf, wie es bspw. für Kolben für Nutzfahrzeuge üblich ist. Besonders bevorzugt weist der Werkstoff des Kühlkanalteils eine Dicke von 0,3 mm bis 0,4 mm auf, wie es bspw. für PKW-Kolben üblich ist. The material of the cooling passage part preferably has a maximum thickness of 0.8 mm, as is customary, for example, for pistons for commercial vehicles. Particularly preferably, the material of the cooling channel part has a thickness of 0.3 mm to 0.4 mm, as is customary, for example, for passenger car pistons.
Ein Ausführungsbeispiel der vorliegenden Erfindung wird im Folgenden anhand der beigefügten Zeichnungen näher erläutert. Es zeigen in einer schematischen, nicht maßstabsgetreuen Darstellung : An embodiment of the present invention will be explained in more detail below with reference to the accompanying drawings. In a schematic, not to scale representation:
Figur 1 ein erstes Ausführungsbeispiel eines erfindungsgemäßen Ringträgers; Figure 1 shows a first embodiment of a ring carrier according to the invention;
Figur 2 ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Ringträgers; Figure 2 shows another embodiment of a ring carrier according to the invention;
Figur 3 eine vergrößerte Detaildarstellung eines Kolbens mit einem erfindungsgemäßen Figure 3 is an enlarged detail of a piston with an inventive
Ringträger gemäß Figur 1.  Ring carrier according to FIG. 1
Die Figuren 1 und 2 zeigen in einer schematischen, nicht maßstabsgetreuen Darstellung zwei Ausführungsbeispiele eines erfindungsgemäßen Ringträgers 10, 1 10. Der Ringträger 10 gemäß Figur 1 weist ein Ringträgerteil 1 1 und ein Kühlkanalteil 12 auf. Das Ringträgerteil besteht im Ausführungsbeispiel aus einem NiResist-Material, das heißt, einem austenitischen Gusseisen mit Lamellengraphit. Das Kühlkanalteil 12 besteht im Ausführungsbeispiel aus einem V2A- Stahlblech und weist eine Dicke von 0,3 mm bis 0,4 mm auf. Das Ringträgerteil 1 1 und das Kühlkanalteil 12 sind in an sich bekannter Weise miteinander verschweißt, wobei die Kanten des Kühlkanalteils 12 über Schweißnähte 13 mit dem Ringträgerteil 1 1 verbunden sind. Die radial zum Kühlkanalteil 12 weisende Fläche 14 des Ringträgerteils 1 1 und das Kühlkanalteil 12 umschließen einen Kühlkanal 15. Erfindungsgemäß weist das Kühlkanalteil 12 eine Luftaustrittsöffnung 16 mit einem Durchmesser von maximal 0,1 mm auf. Die Luftaustrittsöffnung 16 kann bspw. in an sich bekannter Weise mit gepulster Laserstrahlung in das Kühlkanalteil 12 eingebracht werden. Figures 1 and 2 show in a schematic, not to scale representation of two embodiments of a ring carrier 10, 1 according to the invention 10. The ring carrier 10 according to Figure 1 has a ring carrier part 1 1 and a cooling channel part 12. The ring carrier part consists in the embodiment of a NiResist material, that is, an austenitic cast iron with lamellar graphite. In the exemplary embodiment, the cooling channel part 12 consists of a V2A steel sheet and has a thickness of 0.3 mm to 0.4 mm. The ring carrier part 1 1 and the cooling channel part 12 are welded together in a conventional manner, wherein the edges of the cooling channel part 12 are connected by welds 13 with the ring carrier part 1 1. The radially to the cooling channel part 12 facing surface 14 of the annular support member 1 1 and the cooling channel part 12 enclose a cooling channel 15. According to the invention, the cooling channel 12 has an air outlet opening 16 with a diameter of 0.1 mm maximum. The air outlet opening 16 may, for example, be introduced into the cooling channel part 12 in a manner known per se with pulsed laser radiation.
Der einzige Unterschied zwischen dem Ringträger 10 gemäß Figur 1 und dem Ringträger 1 10 gemäß Figur 2 besteht darin, dass das Kühlkanalteil 12 mehrere Luftaustrittsöffnungen 1 16 aufweist, die im Ausführungsbeispiel gleichmäßig über das Kühlkanalteil 12 verteilt sind und einen Durchmesser von maximal 0,1 mm aufweisen. The only difference between the ring carrier 10 according to Figure 1 and the ring carrier 1 10 according to Figure 2 is that the cooling channel member 12 has a plurality of air outlet openings 16 1, which are distributed uniformly over the cooling channel 12 in the embodiment and a maximum diameter of 0.1 mm exhibit.
Figur 3 zeigt beispielhaft einen vergrößerten Ausschnitt eines Kolbens 20 mit einem erfindungsgemäßen Ringträger 10 gemäß Figur 1 , der eine Luftaustrittsöffnung 16 aufweist. Der Kolben 20 weist in an sich bekannter Weise einen Kolbenkopf 21 und einen Kolbenschaft 27 auf. Der Kolbenkopf 21 weist einen Kolbenboden 22 mit einer Verbrennungsmulde 23, einen umlaufenden Feuersteg 24 sowie eine umlaufende Ringpartie 25 mit Ringnuten zur Aufnahme von Kolbenringen (nicht dargestellt) auf. Die oberste Ringnut 26 wird durch den erfindungsgemäßen Ringträger 10 gebildet. FIG. 3 shows by way of example an enlarged section of a piston 20 with a ring carrier 10 according to the invention according to FIG. 1, which has an air outlet opening 16. The piston 20 has a piston head 21 and a piston shaft 27 in a conventional manner. The piston head 21 has a piston head 22 with a combustion bowl 23, a circumferential top land 24 and a peripheral ring 25 with annular grooves for receiving piston rings (not shown). The uppermost annular groove 26 is formed by the ring carrier 10 according to the invention.

Claims

Patentansprüche claims
1. Ringträger (10, 1 10) für einen Kolben eines Verbrennungsmotors mit einem Ringträgerteil (1 1 ) und einem Kühlkanalteil (12), das mit dem Ringträgerteil (1 1 ) fest verbunden ist und zusammen mit dem Ringträgerteil (1 1) einen geschlossenen Kühlkanal (15) bildet, dadurch gekennzeichnet, dass das Kühlkanalteil (12) mit mindestens einer Luftaustrittsöffnung (16, 1 16) mit einem Durchmesser von maximal 0,5 mm versehen ist. 1. ring carrier (10, 1 10) for a piston of an internal combustion engine having a ring carrier part (1 1) and a cooling channel part (12) fixedly connected to the ring carrier part (1 1) and together with the ring carrier part (1 1) a closed Cooling channel (15), characterized in that the cooling channel part (12) with at least one air outlet opening (16, 1 16) is provided with a maximum diameter of 0.5 mm.
2. Ringträger nach Anspruch 1 , dadurch gekennzeichnet, dass die mindestens eine Luftaustrittsöffnung (16, 1 16) im Kühlkanalteil (12) einen Durchmesser von maximal 0,1 mm aufweist. 2. Ring carrier according to claim 1, characterized in that the at least one air outlet opening (16, 1 16) in the cooling channel part (12) has a diameter of not more than 0.1 mm.
3. Ringträger nach Anspruch 1 , dadurch gekennzeichnet, dass genau eine Luftaustrittsöffnung (16) im Kühlkanalteil (12) vorgesehen ist. 3. ring carrier according to claim 1, characterized in that exactly one air outlet opening (16) in the cooling channel part (12) is provided.
4. Ringträger nach Anspruch 1 , dadurch gekennzeichnet, dass mehrere Luftaustrittsöffnungen (1 16) im Kühlkanalteil (12) vorgesehen sind. 4. ring carrier according to claim 1, characterized in that a plurality of air outlet openings (1 16) in the cooling channel part (12) are provided.
5. Ringträger nach Anspruch 4, dadurch gekennzeichnet, dass die Luftaustrittsöffnungen (1 16) gleichmäßig über das Kühlkanalteil (12) verteilt sind. 5. ring carrier according to claim 4, characterized in that the air outlet openings (1 16) evenly over the cooling channel part (12) are distributed.
6. Ringträger nach Anspruch 1 , dadurch gekennzeichnet, dass der Werkstoff des Kühlkanalteils (12) eine Dicke von maximal 0,8 mm aufweist. 6. Ring carrier according to claim 1, characterized in that the material of the cooling channel part (12) has a maximum thickness of 0.8 mm.
7. Ringträger nach Anspruch 1 , dadurch gekennzeichnet, dass der Werkstoff des Kühlkanalteils (12) eine Dicke von maximal 0,3 mm bis 0,4 mm aufweist. 7. ring carrier according to claim 1, characterized in that the material of the cooling channel part (12) has a thickness of at most 0.3 mm to 0.4 mm.
8. Kolben (20) für einen Verbrennungsmotor, mit einem Ringträger (10, 1 10), der einen Ringträgerteil (1 1 ) und einen Kühlkanalteil (12) aufweist, das mit dem Ringträgerteil (1 1 ) fest verbunden ist und zusammen mit dem Ringträgerteil (1 1 ) einen geschlossenen Kühlkanal (15) bildet, dadurch gekennzeichnet, dass das Kühlkanalteil (12) mit mindestens einer Luftaustrittsöffnung (16, 1 16) mit einem Durchmesser von maximal 0,5 mm versehen ist. 8. Piston (20) for an internal combustion engine, with a ring carrier (10, 1 10), which has a ring carrier part (1 1) and a cooling channel part (12) with the ring carrier part (1 1) is firmly connected and together with the ring carrier part (1 1) forms a closed cooling channel (15), characterized in that the cooling channel part (12) with at least one air outlet opening (16, 1 16) with a diameter of at most 0, 5 mm is provided.
9. Kolben nach Anspruch 8, dadurch gekennzeichnet, dass die mindestens eine Luftaustrittsöffnung (16, 1 16) im Kühlkanalteil (12) des Ringträgers (10, 1 10) einen Durchmesser von maximal 0,1 mm aufweist. 9. Piston according to claim 8, characterized in that the at least one air outlet opening (16, 1 16) in the cooling passage part (12) of the annular carrier (10, 1 10) has a diameter of not more than 0.1 mm.
10. Kolben nach Anspruch 8, dadurch gekennzeichnet, dass im Ringträger (10) genau eine Luftaustrittsöffnung (16) im Kühlkanalteil (12) vorgesehen ist. 10. Piston according to claim 8, characterized in that in the ring carrier (10) exactly one air outlet opening (16) in the cooling channel part (12) is provided.
1 1. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass im Ringträger (1 10) mehrere Luftaustrittsöffnungen (1 16) im Kühlkanalteil (12) vorgesehen sind. 1 1. A piston according to claim 1, characterized in that in the ring carrier (1 10) a plurality of air outlet openings (1 16) in the cooling channel part (12) are provided.
12. Kolben nach Anspruch 1 1 , dadurch gekennzeichnet, dass die Luftaustrittsöffnungen (1 16) gleichmäßig über das Kühlkanalteil (12) des Ringträgers (1 10) verteilt sind. 12. Piston according to claim 1 1, characterized in that the air outlet openings (1 16) evenly over the cooling channel part (12) of the annular carrier (1 10) are distributed.
13. Kolben nach Anspruch 8, dadurch gekennzeichnet, dass der Werkstoff des Kühlkanalteils13. Piston according to claim 8, characterized in that the material of the cooling passage part
(12) des Ringträgers (10, 1 10) eine Dicke von maximal 0,8 mm aufweist. (12) of the ring carrier (10, 1 10) has a maximum thickness of 0.8 mm.
14. Kolben nach Anspruch 8, dadurch gekennzeichnet, dass der Werkstoff des Kühlkanalteils (12) des Ringträgers (10, 1 10) eine Dicke von 0,3 mm bis 0,4 mm aufweist. 14. Piston according to claim 8, characterized in that the material of the cooling channel part (12) of the annular carrier (10, 1 10) has a thickness of 0.3 mm to 0.4 mm.
PCT/EP2014/003107 2013-11-21 2014-11-20 Ring support for a piston of an internal combustion engine, and piston for an internal combustion engine WO2015074760A1 (en)

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DE102015221293B4 (en) * 2015-10-30 2022-11-17 Federal-Mogul Nürnberg GmbH Method of manufacturing a piston for an internal combustion engine and Pistons for an internal combustion engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6105540A (en) * 1997-11-12 2000-08-22 Mahle Gmbh Cooled ring carrier assembly
WO2002055912A1 (en) * 2001-01-11 2002-07-18 Mahle Gmbh Method for producing a ring support with a sheet metal cooling channel welded thereon
DE20210600U1 (en) * 2001-07-06 2002-12-05 A I M L Gmbh Coolable ring carrier for internally cooled piston rings
DE102006022413A1 (en) * 2006-05-13 2007-11-15 Ks Kolbenschmidt Gmbh Liquid-cooled piston for an internal combustion engine comprises an annular support cooling channel having an annular support for a piston ring and a cooling channel with a geometrically structured wall with reinforcement structures

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10057366A1 (en) 2000-11-18 2002-05-23 Mahle Gmbh Method for producing a piston with cooled ring carrier
DE10134293B4 (en) * 2001-07-14 2009-06-04 Mahle Gmbh Cooled ring carrier for a piston
DE60203122T2 (en) * 2001-07-30 2005-11-03 Roberto Oscar Appo METHOD OF ASSEMBLING A METAL RING THAT IS MOUNTED TO A BEARING BOND AND THUS SOLVED TO FORM THE RING-TYPE COOLING PIPE OF A COMBUSTION ENGINE PISTON, AND METHOD FOR PRODUCING THE RIBBED METAL RING
JP2003336541A (en) * 2002-05-20 2003-11-28 Mitsubishi Materials Corp Abrasion-resistant piston ring formed with cooling cavity, and method for manufacturing the same
DE10234539B4 (en) * 2002-07-30 2005-02-24 Ks Kolbenschmidt Gmbh Piston with an open-cast cooling channel ring carrier and method for its production
JP2005349458A (en) * 2004-06-14 2005-12-22 Toyota Motor Corp Casting, cast piston, and method for producing casting
JP2011157973A (en) * 2011-03-18 2011-08-18 Toyota Motor Corp Method of manufacturing piston with abrasion resistant ring for piston

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6105540A (en) * 1997-11-12 2000-08-22 Mahle Gmbh Cooled ring carrier assembly
WO2002055912A1 (en) * 2001-01-11 2002-07-18 Mahle Gmbh Method for producing a ring support with a sheet metal cooling channel welded thereon
DE20210600U1 (en) * 2001-07-06 2002-12-05 A I M L Gmbh Coolable ring carrier for internally cooled piston rings
DE102006022413A1 (en) * 2006-05-13 2007-11-15 Ks Kolbenschmidt Gmbh Liquid-cooled piston for an internal combustion engine comprises an annular support cooling channel having an annular support for a piston ring and a cooling channel with a geometrically structured wall with reinforcement structures

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