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EP2655840B1 - Piston for an internal combustion engine - Google Patents

Piston for an internal combustion engine Download PDF

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Publication number
EP2655840B1
EP2655840B1 EP11833595.9A EP11833595A EP2655840B1 EP 2655840 B1 EP2655840 B1 EP 2655840B1 EP 11833595 A EP11833595 A EP 11833595A EP 2655840 B1 EP2655840 B1 EP 2655840B1
Authority
EP
European Patent Office
Prior art keywords
piston
piston component
closing element
component
circumferential
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.)
Not-in-force
Application number
EP11833595.9A
Other languages
German (de)
French (fr)
Other versions
EP2655840A2 (en
Inventor
Rainer Scharp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle International GmbH
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Mahle International GmbH
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Filing date
Publication date
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Publication of EP2655840A2 publication Critical patent/EP2655840A2/en
Application granted granted Critical
Publication of EP2655840B1 publication Critical patent/EP2655840B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping

Definitions

  • the present invention relates to a piston for an internal combustion engine having a first piston component and a second piston component, wherein the first piston component and the second piston component form an open to the second piston component, circumferential cooling channel, which is closed by means of a peripheral closure element.
  • Pistons with such a cooling channel are known per se.
  • the cooling channel of such a piston is closed by means of a circumferential, two-part sheet metal ring.
  • the disadvantage of this arrangement is that two loosely additional components for the preparation of the cooling channel are required.
  • WO 2007/093289 A1 discloses a piston for an internal combustion engine with a piston ring part, which forms an outer circumferential cooling channel with a piston main body and is welded or soldered thereto.
  • the document DE 10 2004 057 624 A1 discloses a piston for an internal combustion engine, with a downwardly-opening circumferential cooling channel, which is closed by a separate, designed as a ring cooling channel cover.
  • the object of the present invention is therefore to design a piston with such a cooling channel so that its production is simplified.
  • the solution consists in that the closure element is integrally connected to the first piston component and extends radially in the direction of the second piston component, that the second piston component has a radially extending in the direction of the first piston component, integrally formed, circumferential support flange that the closure element below Pretension rests on the support flange or that the closure element with a circumferential lower edge supported on an end face of the support flange under bias, that the first piston member has a wall portion of a combustion bowl and the second piston member has a bottom portion of a combustion bowl, that the first piston member and the second piston member are connected to each other by means of a Reibsch rawvons, wherein a joining seam in the region of the combustion bowl is arranged.
  • the closure element is designed as a one-piece structural element of the first piston component and the support flange as an integral structural element with the second piston component.
  • the closure element is biased on the support flange to seal the cooling channel particularly reliable, so that a joining method for connecting the closure element and support flange is not necessary.
  • the first and the second piston component according to the invention are connected to one another by means of a friction welding process.
  • the resulting joint seam is arranged in the region of a combustion bowl. This makes it possible to provide a particular thermally reinforced piston crown or trough edge, depending on the material only of the first closure element. It follows that the first piston component has a wall region of the combustion bowl, while the second piston component has a bottom region of the combustion bowl.
  • the radial width of the closure element and the support flange can be sized equal or different sizes.
  • the radial width of the support flange can be greater than the radial width of the closure element.
  • the end face of the support flange is arranged inclined in the direction of the closure element in order to optimize the sealing of the cooling channel.
  • the closure element and the support flange can also be connected to each other by means of a joining process, for example. Welding or soldering.
  • At least one coolant inlet opening and at least one coolant outlet opening are expediently provided in the closure element and / or in the support flange.
  • the first piston component is a piston ring element which has at least a part of a piston crown, a circumferential crown land and a circumferential annular band provided with annular grooves.
  • the closure element is connected to the first piston component in the region of a lower free end of the annular band.
  • the second piston component is preferably designed as a piston main body, particularly preferably for a box piston, which has at least one piston shaft with piston hubs which are provided with hub bores.
  • the piston skirt is thermally decoupled from the ring band.
  • FIG. 1 shows a first embodiment of a piston 10 according to the invention.
  • the piston 10 consists of a first piston member 11 and a second piston member 12.
  • the first piston member 11 is formed as a piston ring member and the second piston member 12 as a piston body for a box piston.
  • Other divisions are also conceivable as long as the ring band 15 (see below) at least in the region of its free end 24 (see below) is formed by the first piston member 11. Both components can be made of any suitable metallic material.
  • the first piston component 11 has a piston bottom 13 and a circumferential top land 14 and a circumferential annular band 15 with annular grooves for receiving piston rings (not shown).
  • the first piston component 11 also forms a wall region 16 'of a combustion bowl 16.
  • the second piston member 12 forms in the present embodiment, a thermally decoupled from the annular band 15 piston skirt 17, which is provided in a conventional manner with hubs 18 and hub bores 19 for receiving a piston pin (not shown).
  • the hubs 18 are connected to each other via running surfaces 21.
  • the second piston component 12 also forms a bottom region 16 "of the combustion bowl 16.
  • the hubs 18 are connected via hub connections 22 on the underside of the combustion bowl 16.
  • the first piston component 11 and the second piston component 12 are connected to one another via a joining seam 27, in the exemplary embodiment by means of friction welding.
  • the annular band 15 has a closure element 25 at its free lower end 24.
  • the closure element 25 extends radially in the direction of the second piston component 12 and, in the exemplary embodiment, is connected in one piece with the free end 24 of the annular band 15 of the first piston component 11.
  • the second piston component 12 has, in the exemplary embodiment approximately at the level of the hub connections 22, a circumferential bearing flange 26, which is integral with the second piston component 12.
  • the closure element 25 and the support flange 26 are dimensioned such that after the joining of the first piston component 11 and the second piston component 12, the closure element 25 rests on the support flange 26.
  • the closure element 25 can in this case rest tension-free or under pretension on the support flange 26. In the latter case, a particularly reliable sealing of the cooling channel 23 is given.
  • the closure element 25 and the support flange 26 may also be joined together by joining, for example. Welding or soldering.
  • the radial width of the closure member 25 is sized larger than the radial width of the support flange 26 and extends in this particular case almost over the entire cross section of the cooling channel 23. Therefore, the openings 28 for the access and the flow of the coolant in the closure element 25th brought in.
  • FIG. 2 shows a further embodiment of a piston 110 according to the invention.
  • the piston 110 largely corresponds to the piston 10 according to FIG. 1 , so that the same reference numerals are provided for the same structural elements and in this regard to the description FIG. 1 is referenced.
  • the main difference to that in FIG. 1 illustrated embodiment is that the radial width of the closure member 125 dimensioned smaller than the radial width of the support flange 126.
  • the support flange 126 extends almost over the entire cross section of the cooling channel 23. Therefore, the openings 28 for the access or the Drain the coolant introduced in the support flange 126.
  • FIG. 3 shows a further embodiment of a piston 210 according to the invention.
  • the piston 210 largely corresponds to the piston 10 according to FIG. 1 , so that the same reference numerals are provided for the same structural elements and in this regard to the description FIG. 1 is referenced.
  • the main difference to that in FIG. 1 illustrated embodiment is that the radial width of the closure element 225 in about the radial Width of the support flange 226 corresponds. Therefore, the openings 28 for the access and the discharge of the coolant are introduced both in the closure element 225 and in the support flange 226.
  • FIG. 4 shows a detailed view of another embodiment of a piston 310 according to the invention.
  • the piston 310 largely corresponds to the piston 10 according to FIG. 1 , so that the same reference numerals are provided for the same structural elements and in this regard to the description FIG. 1 is referenced.
  • closure member 325 has a circumferential lower edge 329 and the support flange 326 has an end face 331.
  • the end face 331 of the support flange 326 is arranged inclined in the direction of the closure element 325.
  • the circumferential lower edge 329 of the closure element 325 is supported, possibly under prestress, on the end face 331 of the support flange 326.
  • the openings 28 for the access or the discharge of the coolant are in this case introduced into the closure element 325.

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

Description

Die vorliegende Erfindung betrifft einen Kolben für einen Verbrennungsmotor mit einem ersten Kolbenbauteil und einem zweiten Kolbenbauteil, wobei das erste Kolbenbauteil und das zweite Kolbenbauteil einen zum zweiten Kolbenbauteil hin offenen, umlaufenden Kühlkanal bilden, welcher mittels eines umlaufenden Verschlusselements verschlossen ist.The present invention relates to a piston for an internal combustion engine having a first piston component and a second piston component, wherein the first piston component and the second piston component form an open to the second piston component, circumferential cooling channel, which is closed by means of a peripheral closure element.

Kolben mit einem derartigen Kühlkanal sind an sich bekannt. Der Kühlkanal eines solchen Kolbens wird mittels eines umlaufenden, zweiteiligen Blechrings verschlossen. Der Nachteil dieser Anordnung besteht darin, dass zwei lose zusätzliche Bauteile zur Herstellung des Kühlkanals erforderlich sind.Pistons with such a cooling channel are known per se. The cooling channel of such a piston is closed by means of a circumferential, two-part sheet metal ring. The disadvantage of this arrangement is that two loosely additional components for the preparation of the cooling channel are required.

Das Dokument WO 2007/093289 A1 offenbart einen Kolben für einen Verbrennungsmotor mit einem Kolbenringteil, welches mit einem Kolbengrundkörper einen äußeren umlaufenden Kühlkanal bildet und mit diesem verschweißt oder verlötet ist.The document WO 2007/093289 A1 discloses a piston for an internal combustion engine with a piston ring part, which forms an outer circumferential cooling channel with a piston main body and is welded or soldered thereto.

Das Dokument DE 10 2004 057 624 A1 offenbart einen Kolben für einen Verbrennungsmotor, mit einem nach unten offenen umlaufenden Kühlkanal, der von einer separaten, als Ring ausgebildeten Kühlkanalabdeckung verschlossen ist.The document DE 10 2004 057 624 A1 discloses a piston for an internal combustion engine, with a downwardly-opening circumferential cooling channel, which is closed by a separate, designed as a ring cooling channel cover.

Die Aufgabe der vorliegenden Erfindung besteht somit darin, einen Kolben mit einem derartigen Kühlkanal so auszubilden, dass seine Herstellung vereinfacht wird.The object of the present invention is therefore to design a piston with such a cooling channel so that its production is simplified.

Die Lösung besteht darin, dass das Verschlusselement mit dem ersten Kolbenbauteil einstückig verbunden ist und sich radial in Richtung des zweiten Kolbenbauteils erstreckt, dass das zweite Kolbenbauteil einen sich radial in Richtung des ersten Kolbenbauteils erstreckenden, einstückig ausgebildeten, umlaufenden Auflageflansch aufweist, dass das Verschlusselement unter Vorspannung auf dem Auflageflansch aufliegt oder dass das Verschlusselement sich mit einer umlaufenden Unterkante an einer Stirnfläche des Auflageflanschs unter Vorspannung abstützt, dass das erste Kolbenbauteil einen Wandbereich einer Brennraummulde aufweist und das zweite Kolbenbauteil einen Bodenbereich einer Brennraummulde aufweist, dass das erste Kolbenbauteil und das zweite Kolbenbauteil mittels eines Reibschweißverfahrens miteinander verbunden sind, wobei eine Fügenaht im Bereich der Brennraummulde angeordnet ist.The solution consists in that the closure element is integrally connected to the first piston component and extends radially in the direction of the second piston component, that the second piston component has a radially extending in the direction of the first piston component, integrally formed, circumferential support flange that the closure element below Pretension rests on the support flange or that the closure element with a circumferential lower edge supported on an end face of the support flange under bias, that the first piston member has a wall portion of a combustion bowl and the second piston member has a bottom portion of a combustion bowl, that the first piston member and the second piston member are connected to each other by means of a Reibschweißverfahrens, wherein a joining seam in the region of the combustion bowl is arranged.

Erfindungsgemäß ist also vorgesehen, dass das Verschlusselement als einstückiges Strukturelement des ersten Kolbenbauteils und der Auflageflansch als einstückiges Strukturelement mit dem zweiten Kolbenbauteil ausgebildet ist. Damit wird kein Ringblech zum Verschließen des Kühlkanals mehr benötigt, so dass ein Montageschritt zur Herstellung des erfindungsgemäßen Kolbens entfällt und der Kolben keine losen Bauteile mehr aufweist.According to the invention, it is thus provided that the closure element is designed as a one-piece structural element of the first piston component and the support flange as an integral structural element with the second piston component. Thus, a ring plate for closing the cooling channel is no longer needed, so that an assembly step for the production of the piston according to the invention is eliminated and the piston no longer has loose components.

Erfindungsgemäß liegt das Verschlusselement unter Vorspannung auf dem Auflageflansch auf, um den Kühlkanal besonders zuverlässig abzudichten, so dass ein Fügeverfahren zum Verbinden von Verschlusselement und Auflageflansch nicht notwendig ist.According to the invention the closure element is biased on the support flange to seal the cooling channel particularly reliable, so that a joining method for connecting the closure element and support flange is not necessary.

Das erste und das zweite Kolbenbauteil sind erfindungsgemäß mittels eines Reibschweißverfahrens miteinander verbunden. Hierbei ist die resultierende Fügenaht im Bereich einer Brennraummulde angeordnet. Dies erlaubt es, einen insbesondere thermisch verstärkten Kolbenboden bzw. Muldenrand vorzusehen, abhängig vom Werkstoff lediglich des ersten Verschlusselements. Daraus ergibt sich, dass das erste Kolbenbauteil einen Wandbereich der Brennraummulde aufweist, während das zweite Kolbenbauteil einen Bodenbereich der Brennraummulde aufweist.The first and the second piston component according to the invention are connected to one another by means of a friction welding process. Here, the resulting joint seam is arranged in the region of a combustion bowl. This makes it possible to provide a particular thermally reinforced piston crown or trough edge, depending on the material only of the first closure element. It follows that the first piston component has a wall region of the combustion bowl, while the second piston component has a bottom region of the combustion bowl.

Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.Advantageous developments emerge from the subclaims.

Die radiale Breite des Verschlusselements und des Auflageflanschs kann gleich oder unterschiedlich groß bemessen sein. Insbesondere kann die radiale Breite des Auflageflanschs größer als die radiale Breite des Verschlusselements sein.The radial width of the closure element and the support flange can be sized equal or different sizes. In particular, the radial width of the support flange can be greater than the radial width of the closure element.

Es ist zweckmäßig, dass die Stirnfläche des Auflageflanschs in Richtung auf das Verschlusselement geneigt angeordnet ist, um die Abdichtung des Kühlkanals zu optimieren. Das Verschlusselement und der Auflageflansch können aber auch mittels eines Fügeverfahrens, bspw. Schweißen oder Löten, miteinander verbunden sein.It is expedient that the end face of the support flange is arranged inclined in the direction of the closure element in order to optimize the sealing of the cooling channel. But the closure element and the support flange can also be connected to each other by means of a joining process, for example. Welding or soldering.

Im Verschlusselement und/oder im Auflageflansch sind zweckmäßigerweise mindestens eine Kühlmittelzutrittsöffnung und mindestens eine Kühlmittelaustrittsöffnung vorgesehen.At least one coolant inlet opening and at least one coolant outlet opening are expediently provided in the closure element and / or in the support flange.

Eine besonders bevorzugte Weiterbildung besteht darin, dass das erste Kolbenbauteil ein Kolbenringelement ist, welches zumindest einen Teil eines Kolbenbodens, einen umlaufenden Feuersteg sowie ein mit Ringnuten versehenes umlaufendes Ringband aufweist. In diesem Fall ist es besonders zweckmäßig, wenn das Verschlusselement im Bereich eines unteren freien Endes des Ringbands mit dem ersten Kolbenbauteil verbunden ist.A particularly preferred development consists in that the first piston component is a piston ring element which has at least a part of a piston crown, a circumferential crown land and a circumferential annular band provided with annular grooves. In this case, it is particularly expedient if the closure element is connected to the first piston component in the region of a lower free end of the annular band.

Das zweite Kolbenbauteil ist bevorzugt als Kolbengrundkörper, besonders bevorzugt für einen Kastenkolben, ausgebildet, der zumindest einen Kolbenschaft mit Kolbennaben, die mit Nabenbohrungen versehen sind, aufweist.The second piston component is preferably designed as a piston main body, particularly preferably for a box piston, which has at least one piston shaft with piston hubs which are provided with hub bores.

Vorzugsweise ist der Kolbenschaft zum Ringband thermisch entkoppelt ausgebildet.Preferably, the piston skirt is thermally decoupled from the ring band.

Ausführungsbeispiele der vorliegenden Erfindung werden im Folgenden anhand der beigefügten Zeichnungen näher erläutert. Es zeigen in einer schematischen, nicht maßstabsgetreuen Darstellung:

Figur 1
ein Ausführungsbeispiel eines erfindungsgemäßen Kolbens im Schnitt;
Figur 2
ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Kolbens im Schnitt;
Figur 3
ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Kolbens im Schnitt;
Figur 4
eine Detailansicht eines weiteren Ausführungsbeispiels eines erfindungsgemäßen Kolbens im Schnitt.
Embodiments of the present invention are explained in more detail below with reference to the accompanying drawings. In a schematic, not to scale representation:
FIG. 1
an embodiment of a piston according to the invention in section;
FIG. 2
a further embodiment of a piston according to the invention in section;
FIG. 3
a further embodiment of a piston according to the invention in section;
FIG. 4
a detailed view of another embodiment of a piston according to the invention in section.

Figur 1 zeigt ein erstes Ausführungsbeispiel eines erfindungsgemäßen Kolbens 10. Der Kolben 10 besteht aus einem ersten Kolbenbauteil 11 und einem zweiten Kolbenbauteil 12. Im vorliegenden Ausführungsbeispiel ist das erste Kolbenbauteil 11 als Kolbenringelement und das zweite Kolbenbauteil 12 als Kolbengrundkörper für einen Kastenkolben ausgebildet. Andere Aufteilungen sind ebenfalls denkbar, solange das Ringband 15 (siehe unten) zumindest im Bereich seines freien Endes 24 (siehe unten) vom ersten Kolbenbauteil 11 gebildet ist. Beide Bauteile können aus jedem geeigneten metallischen Werkstoff bestehen. FIG. 1 shows a first embodiment of a piston 10 according to the invention. The piston 10 consists of a first piston member 11 and a second piston member 12. In the present embodiment, the first piston member 11 is formed as a piston ring member and the second piston member 12 as a piston body for a box piston. Other divisions are also conceivable as long as the ring band 15 (see below) at least in the region of its free end 24 (see below) is formed by the first piston member 11. Both components can be made of any suitable metallic material.

Das erste Kolbenbauteil 11 weist im Ausführungsbeispiel einen Kolbenboden 13 sowie einen umlaufenden Feuersteg 14 und ein umlaufendes Ringband 15 mit Ringnuten zur Aufnahme von Kolbenringen (nicht dargestellt) auf. Das erste Kolbenbauteil 11 bildet ferner einen Wandbereich 16' einer Brennraummulde 16.In the exemplary embodiment, the first piston component 11 has a piston bottom 13 and a circumferential top land 14 and a circumferential annular band 15 with annular grooves for receiving piston rings (not shown). The first piston component 11 also forms a wall region 16 'of a combustion bowl 16.

Das zweite Kolbenbauteil 12 bildet im vorliegenden Ausführungsbeispiel einen vom Ringband 15 thermisch entkoppelten Kolbenschaft 17, der in an sich bekannter Weise mit Naben 18 und Nabenbohrungen 19 zur Aufnahme eines Kolbenbolzens (nicht dargestellt) versehen ist. Die Naben 18 sind über Laufflächen 21 miteinander verbunden. Das zweite Kolbenbauteil 12 bildet ferner einen Bodenbereich 16" der Brennraummulde 16. Die Naben 18 sind über Nabenanbindungen 22 an der Unterseite der Brennraummulde 16 angebunden.The second piston member 12 forms in the present embodiment, a thermally decoupled from the annular band 15 piston skirt 17, which is provided in a conventional manner with hubs 18 and hub bores 19 for receiving a piston pin (not shown). The hubs 18 are connected to each other via running surfaces 21. The second piston component 12 also forms a bottom region 16 "of the combustion bowl 16. The hubs 18 are connected via hub connections 22 on the underside of the combustion bowl 16.

Das erste Kolbenbauteil 11 und das zweite Kolbenbauteil 12 sind über eine Fügenaht 27 miteinander verbunden, im Ausführungsbeispiel mittels Reibschweißen.The first piston component 11 and the second piston component 12 are connected to one another via a joining seam 27, in the exemplary embodiment by means of friction welding.

Das Ringband 15 des ersten Kolbenbauteils 11 bildet zusammen mit dem zweiten Kolbenbauteil 12 in an sich bekannter Weise einen zum Kolbenschaft 17 hin offenen, umlaufenden Kühlkanal 23. Zum Verschließen des Kühlkanals 23 weist das Ringband 15 an seinem freien unteren Ende 24 ein Verschlusselement 25 auf. Das Verschlusselement 25 erstreckt sich radial in Richtung des zweiten Kolbenbauteils 12 und ist im Ausführungsbeispiel einstückig mit dem freien Ende 24 des Ringbands 15 des ersten Kolbenbauteils 11 verbunden. Das zweite Kolbenbauteil 12 weist, im Ausführungsbeispiel etwa in Höhe der Nabenanbindungen 22, einen umlaufenden Auflageflansch 26 auf, der mit dem zweiten Kolbenbauteil 12 einstückig ist.The annular band 15 of the first piston component 11, together with the second piston component 12, forms a circumferential cooling channel 23 which is open towards the piston shaft 17. For closing the cooling channel 23, the annular band 15 has a closure element 25 at its free lower end 24. The closure element 25 extends radially in the direction of the second piston component 12 and, in the exemplary embodiment, is connected in one piece with the free end 24 of the annular band 15 of the first piston component 11. The second piston component 12 has, in the exemplary embodiment approximately at the level of the hub connections 22, a circumferential bearing flange 26, which is integral with the second piston component 12.

Das Verschlusselement 25 und der Auflageflansch 26 sind so bemessen, dass nach dem Fügen des ersten Kolbenbauteils 11 und des zweiten Kolbenbauteils 12 das Verschlusselement 25 auf dem Auflageflansch 26 aufliegt. Das Verschlusselement 25 kann hierbei spannungsfrei oder unter Vorspannung auf dem Auflageflansch 26 aufliegen. Im letzteren Fall ist eine besonders zuverlässige Abdichtung des Kühlkanals 23 gegeben. Das Verschlusselement 25 und der Auflageflansch 26 können auch zusätzlich durch Fügen, bspw. Schweißen oder Löten, miteinander verbunden sein.The closure element 25 and the support flange 26 are dimensioned such that after the joining of the first piston component 11 and the second piston component 12, the closure element 25 rests on the support flange 26. The closure element 25 can in this case rest tension-free or under pretension on the support flange 26. In the latter case, a particularly reliable sealing of the cooling channel 23 is given. The closure element 25 and the support flange 26 may also be joined together by joining, for example. Welding or soldering.

In dem in Figur 1 dargestellten Ausführungsbeispiel ist die radiale Breite des Verschlusselements 25 größer bemessen als die radiale Breite des Auflageflansches 26 und erstreckt sich in diesem Einzelfall nahezu über den gesamten Querschnitt des Kühlkanals 23. Daher sind die Öffnungen 28 für den Zutritt bzw. den Ablauf des Kühlmittels im Verschlusselement 25 eingebracht.In the in FIG. 1 illustrated embodiment, the radial width of the closure member 25 is sized larger than the radial width of the support flange 26 and extends in this particular case almost over the entire cross section of the cooling channel 23. Therefore, the openings 28 for the access and the flow of the coolant in the closure element 25th brought in.

Figur 2 zeigt ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Kolbens 110. Der Kolben 110 entspricht weitgehend dem Kolben 10 gemäß Figur 1, so dass für gleiche Strukturelemente dieselben Bezugszeichen vorgesehen sind und diesbezüglich auf die Beschreibung zu Figur 1 verwiesen wird. FIG. 2 shows a further embodiment of a piston 110 according to the invention. The piston 110 largely corresponds to the piston 10 according to FIG. 1 , so that the same reference numerals are provided for the same structural elements and in this regard to the description FIG. 1 is referenced.

Der wesentliche Unterschied zu dem in Figur 1 dargestellten Ausführungsbeispiel besteht darin, dass die radiale Breite des Verschlusselements 125 kleiner bemessen als die radiale Breite des Auflageflansches 126. In diesem Ausführungsbeispiel erstreckt sich der Auflageflansch 126 nahezu über den gesamten Querschnitt des Kühlkanals 23. Daher sind die Öffnungen 28 für den Zutritt bzw. den Ablauf des Kühlmittels im Auflageflansch 126 eingebracht.The main difference to that in FIG. 1 illustrated embodiment is that the radial width of the closure member 125 dimensioned smaller than the radial width of the support flange 126. In this embodiment, the support flange 126 extends almost over the entire cross section of the cooling channel 23. Therefore, the openings 28 for the access or the Drain the coolant introduced in the support flange 126.

Figur 3 zeigt ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Kolbens 210. Der Kolben 210 entspricht weitgehend dem Kolben 10 gemäß Figur 1, so dass für gleiche Strukturelemente dieselben Bezugszeichen vorgesehen sind und diesbezüglich auf die Beschreibung zu Figur 1 verwiesen wird. FIG. 3 shows a further embodiment of a piston 210 according to the invention. The piston 210 largely corresponds to the piston 10 according to FIG. 1 , so that the same reference numerals are provided for the same structural elements and in this regard to the description FIG. 1 is referenced.

Der wesentliche Unterschied zu dem in Figur 1 dargestellten Ausführungsbeispiel besteht darin, dass die radiale Breite des Verschlusselements 225 in etwa der radialen Breite des Auflageflansches 226 entspricht. Daher sind die Öffnungen 28 für den Zutritt bzw. den Ablauf des Kühlmittels sowohl im Verschlusselement 225 als auch im Auflageflansch 226 eingebracht.The main difference to that in FIG. 1 illustrated embodiment is that the radial width of the closure element 225 in about the radial Width of the support flange 226 corresponds. Therefore, the openings 28 for the access and the discharge of the coolant are introduced both in the closure element 225 and in the support flange 226.

Figur 4 zeigt eine Detailansicht eines weiteren Ausführungsbeispiels eines erfindungsgemäßen Kolbens 310. Der Kolben 310 entspricht weitgehend dem Kolben 10 gemäß Figur 1, so dass für gleiche Strukturelemente dieselben Bezugszeichen vorgesehen sind und diesbezüglich auf die Beschreibung zu Figur 1 verwiesen wird. FIG. 4 shows a detailed view of another embodiment of a piston 310 according to the invention. The piston 310 largely corresponds to the piston 10 according to FIG. 1 , so that the same reference numerals are provided for the same structural elements and in this regard to the description FIG. 1 is referenced.

Der wesentliche Unterschied zu dem in Figur 1 dargestellten Ausführungsbeispiel besteht darin, dass das Verschlusselement 325 eine umlaufende Unterkante 329 und der Auflageflansch 326 eine Stirnfläche 331 aufweist. Die Stirnfläche 331 des Auflageflanschs 326 ist in Richtung auf das Verschlusselement 325 geneigt angeordnet. Die umlaufende Unterkante 329 des Verschlusselements 325 stützt sich, ggf. unter Vorspannung, an der Stirnfläche 331 des Auflageflanschs 326 ab. Die Öffnungen 28 für den Zutritt bzw. den Ablauf des Kühlmittels sind hierbei im Verschlusselement 325 eingebracht.The main difference to that in FIG. 1 illustrated embodiment is that the closure member 325 has a circumferential lower edge 329 and the support flange 326 has an end face 331. The end face 331 of the support flange 326 is arranged inclined in the direction of the closure element 325. The circumferential lower edge 329 of the closure element 325 is supported, possibly under prestress, on the end face 331 of the support flange 326. The openings 28 for the access or the discharge of the coolant are in this case introduced into the closure element 325.

Claims (9)

  1. A piston (10, 110, 210, 310) for an internal combustion engine, comprising a first piston component (11) and a second piston component (12), wherein the first piston component (11) and the second piston component (12) form a circumferential cooling channel (23) which is open toward the second piston component (12) and which is closed by means of a circumferential closing element, characterized in that the closing element (25, 125, 225, 325) is integrally connected to the first piston component (11) and extends radially in the direction of the second piston component (12), that the second piston component (12) has a circumferential contact flange (26, 126, 226, 326) that is formed as one piece and extends radially in the direction of the first piston component (11), that the closing element (25, 125, 225) rests under bias on the contact flange (26, 126, 226), or that the closing element (325) is supported under bias on an end face (331) of the contact flange (326) with a circumferential bottom edge (329) of the closing element, that the first piston component (11) has a wall region (16') of a combustion chamber bowl (16) and the second piston component (12) has a crown region (16'') of a combustion chamber bowl (16), that first piston component (11) and the second piston component (12) are connected to one another by means of a friction welding method, wherein a joining seam (27) is arranged in the region of the combustion chamber bowl (16).
  2. The piston according to claim 1, characterized in that the radial width of the closing element (25, 125, 225, 325) and of the contact flange (26, 126, 226, 326) is dimensioned to be the same size or different sizes.
  3. The piston according to claim 1, characterized in that the end face (331) of the contact flange (326) is arranged inclined in the direction toward the closing element (325).
  4. The piston according to claim 1, characterized in that the closing element (25, 125, 225, 325) and the contact flange (26, 126, 226, 326) are connected to one another by means of a joining method.
  5. The piston according to claim 1, characterized in that at least one coolant inlet opening (28) and at least one coolant outlet opening (28) are provided in the closing element (25, 125, 225, 325) and/or in the contact flange (26, 126, 226, 326).
  6. The piston according to claim 1, characterized in that the first piston component (11) is piston ring element which has at least a part of a piston crown (13), a circumferential top land (14) as well as a circumferential ring belt (15) provided with ring grooves.
  7. The piston according to claim 1, characterized in that the closing element (25, 125, 225, 325) is connected to the first piston component (11) in the region of a lower free end of the ring belt (15).
  8. The piston according to claim 1, characterized in that the second piston component (12) is a piston base body that has at least one piston skirt (17) having piston pin bosses (18) that are provided with pin bores (19).
  9. The piston according to claim 1, characterized in that the piston skirt (17) is configured to be thermally uncoupled from the ring belt (15).
EP11833595.9A 2010-12-24 2011-12-15 Piston for an internal combustion engine Not-in-force EP2655840B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010056218A DE102010056218A1 (en) 2010-12-24 2010-12-24 Piston for an internal combustion engine
PCT/DE2011/002129 WO2012083929A2 (en) 2010-12-24 2011-12-15 Piston for an internal combustion engine

Publications (2)

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EP2655840A2 EP2655840A2 (en) 2013-10-30
EP2655840B1 true EP2655840B1 (en) 2015-06-03

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EP11833595.9A Not-in-force EP2655840B1 (en) 2010-12-24 2011-12-15 Piston for an internal combustion engine

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US (1) US20120160203A1 (en)
EP (1) EP2655840B1 (en)
CN (1) CN203604062U (en)
DE (1) DE102010056218A1 (en)
WO (1) WO2012083929A2 (en)

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KR20150063550A (en) * 2012-10-08 2015-06-09 콤포넨타 핀란드 오와이 A piston for an internal combustion engine
DE102013009164A1 (en) * 2013-05-31 2014-12-04 Mahle International Gmbh Piston for an internal combustion engine
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CN104747312A (en) * 2015-02-16 2015-07-01 山东滨州渤海活塞股份有限公司 Internal combustion engine piston with internal cooling oil cavity structure and internal combustion engine
CN104776221A (en) * 2015-03-17 2015-07-15 尹建 Reciprocating piton chain type connecting rod dead point-free engine piston-connecting rod unit
US11162453B2 (en) 2016-05-04 2021-11-02 Ks Kolbenschmidt Gmbh Piston
CN106979329A (en) * 2017-05-23 2017-07-25 湖南江滨机器（集团）有限责任公司 A kind of all-steel piston
DE102019215486A1 (en) * 2019-10-09 2021-04-15 Mahle International Gmbh Pistons for an internal combustion engine

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Also Published As

Publication number Publication date
EP2655840A2 (en) 2013-10-30
WO2012083929A3 (en) 2012-10-04
CN203604062U (en) 2014-05-21
WO2012083929A2 (en) 2012-06-28
US20120160203A1 (en) 2012-06-28
DE102010056218A1 (en) 2012-06-28

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