EP2288800A1 - Piston for an internal combustion engine - Google Patents

Piston for an internal combustion engine

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Publication number
EP2288800A1
EP2288800A1 EP09765817A EP09765817A EP2288800A1 EP 2288800 A1 EP2288800 A1 EP 2288800A1 EP 09765817 A EP09765817 A EP 09765817A EP 09765817 A EP09765817 A EP 09765817A EP 2288800 A1 EP2288800 A1 EP 2288800A1
Authority
EP
European Patent Office
Prior art keywords
piston
level
cooling channel
outflow
axis
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.)
Granted
Application number
EP09765817A
Other languages
German (de)
French (fr)
Other versions
EP2288800B1 (en
Inventor
Marcus Freidhager
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.)
Federal Mogul Nuernberg GmbH
Original Assignee
Federal Mogul Nuernberg GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Federal Mogul Nuernberg GmbH filed Critical Federal Mogul Nuernberg GmbH
Priority to PL09765817T priority Critical patent/PL2288800T3/en
Publication of EP2288800A1 publication Critical patent/EP2288800A1/en
Application granted granted Critical
Publication of EP2288800B1 publication Critical patent/EP2288800B1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/105—Salt cores
    • 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

Abstract

A piston (10) for an internal combustion engine comprises at least one cooling channel (24) located only in the area of at least one inflow and at least one outflow (14) at a low level (12) comparatively removed from the base of the piston and at a constant higher level (16) closer to the piston base, said cooling channel comprising steep inclines (18) between the areas located at the low (12) and at the high level (16).

Description

Kolben für einen Verbrennungsmotor Piston for an internal combustion engine
Technisches GebietTechnical area
Die Erfindung betrifft einen Kolben für einen Verbrennungsmotor .The invention relates to a piston for an internal combustion engine.
Auf dem Gebiet der Verbrennungsmotoren muss allgemein für eine ausreichende Kühlung der Kolben gesorgt werden. Ferner erhohen sich fortlaufend die spezifischen Leistungen der Motoren, insbesondere bei Dieselmotoren, was zu immer höheren Kolbentemperaturen fuhrt. Dies kann die Lebensdauer und die Festigkeit beeinträchtigen. Insofern ist: insbesondere an kritischen Stellen, wie z.B. dem Muldenrand und der obersten Ringnut des Kolbens für eine effiziente Kühlung zu sorgen.In the field of internal combustion engines must be provided in general for a sufficient cooling of the piston. Furthermore, the specific performances of the engines are continuously increasing, especially in diesel engines, which leads to ever higher piston temperatures. This can affect the life and strength. In this respect: especially at critical points, e.g. the bowl rim and the top annular groove of the piston for efficient cooling.
Stand der TechnikState of the art
Aus der JP 2002 221086 geht ein Kolben hervor, bei dem der Kuhlkanal im Bereich der Bolzennaben in Richtung derselben abgesenkt ist .From JP 2002 221086, a piston emerges in which the cooling channel in the region of the pin bosses is lowered in the direction of the same.
Die WO 03/098022 betrifft einen Kolben, bei dem sich der Kuhlkanal vom Ein- zum Auslass kontinuierlich in Richtung auf ein niedrigeres Niveau erweitert. Darstell-ung der ErfindungWO 03/098022 relates to a piston in which the cooling channel widens continuously from the inlet to the outlet in the direction of a lower level. Presentation of the invention
Der Erfindung liegt die Aufgabe zugrunde, einen Kolben für einen Verbrennungsmotor zu schaffen, der im Hinblick auf die Kühlung, insbesondere der kritischen Bereiche, verbessert ist.The invention has for its object to provide a piston for an internal combustion engine, which is improved in terms of cooling, in particular the critical areas.
Die Losung dieser Aufgabe erfolgt durch den im Anspruch 1 beschriebenen Kolben.The solution of this task is carried out by the piston described in claim 1.
Demzufolge weist dieser zumindest einen Kύhlkanal auf, der sich ausschließlich im Bereich zumindest eines Zu- und zumindest eines Abflusses auf einem vergleichweise niedrigen, von dem Kolbenboden vergleichweise entfernten Niveau, und im übrigen auf einem gleichbleibend höheren, vergleichsweise naher zu dem Kolbenboden gelegenen Niveau befindet. Durch die Anordnung auf dem vergleichweise "hohen" Niveau kann der Kuhlkanal in seinem überwiegenden Verlauf besonders nah an den kritischen Stellen, wie z.B. dem Muldenrand und der obersten Ringnut ausgebildet werden. Insbesondere kann sich der Kuhlkanal weitgehend vollständig auf dem Niveau eines Ringtragers befinden, so dass dieser kritische Bereich besonders effizient gekühlt werden kann. Dies gilt in gleicher Weise für den sich in Richtung der Rotationsachse des Kolbens anschließenden Bereich der Brennraummulde. Auch bezüglich dieser kann der Kuhlkanal in dem erfindungsgemaßen Kolben weitgehend vollständig auf dem Niveau der Brennraummulde ausgebildet werden, so dass hier eine besonders gute Kühlwirkung erfolgt.Accordingly, this has at least one cooling channel which is located exclusively in the region of at least one inlet and at least one outlet at a comparatively low level, which is comparatively remote from the piston crown, and moreover at a consistently higher level, which is comparatively closer to the piston crown. By being placed at the comparatively "high" level, the cooling channel, in its predominant course, can be particularly close to the critical points, e.g. the trough edge and the uppermost annular groove are formed. In particular, the cooling channel can be largely completely at the level of a ring carrier, so that this critical region can be cooled particularly efficiently. This applies equally to the area of the combustion bowl which adjoins in the direction of the axis of rotation of the piston. Also with regard to this, the cooling channel in the piston according to the invention can be formed largely completely at the level of the combustion bowl, so that a particularly good cooling effect takes place here.
Gleichzeitig kann den Erfordernissen am Zu™ und Abfluss bei dem erfindungsgemaßen Kolben besonders gut Rechnung getragen werden. In diesen Bereichen ist es nämlich vorteilhaft, wenn der Querschnitt des Kuhlkanals gegenüber seinem übrigen Verlauf etwas vergrößert ist, um einen gunstigen Zu- und Abfluss zu gewahrleisten. Ein m dieser Weise vergrößerter Zu- und Abfluss kann bei dem erfindungsgeraaßen Kolben dadurch besonders einfach ausgebildet werden, dass sich der Kuhlkanal im Bereich zumindest eines Zu- und zumindest eines Abflusses auf einem niedrigeren, d.h. von dem Kolbenboden weiter entfernten Niveau befindet. Der Kuhlkanal wird somit m diesen Zonen aus dem Bereich zwischen der obersten Ringnut und der Brennraummulde etwas abgesenkt, so dass die Querschnittsvergroßerung des Kuhlkanals vorgesehen werden kann, ohne die Festigkeit zu gefährden. Sowohl zu der obersten Ringnut als auch zu der Brennraummulde kann nämlich eine ausreichende Materialdicke beibehalten werden, um den Festigkeitsanforderungen weiterhin zu genügen.At the same time, the requirements for the flow and outflow in the piston according to the invention can be particularly well taken into account. In fact, in these areas it is advantageous if the cross-section of the cooling channel is slightly larger than its remaining course in order to ensure a favorable inflow and outflow. A m this way enlarged inflow and outflow can in the erfindungsgeraaßen piston thereby be formed particularly simple that the Kuhlkanal is in the range of at least one inlet and at least one outflow on a lower, that is farther from the piston crown level. The cooling channel is thus slightly lowered in these zones from the region between the uppermost annular groove and the combustion bowl, so that the cross-sectional enlargement of the cooling channel can be provided without endangering the strength. Namely, a sufficient material thickness can be maintained both to the uppermost annular groove and to the combustion bowl in order to continue to meet the strength requirements.
Dadurch, dass sich der Kuhlkanal ausschließlich im Bereich des Zu- und zumindest eines Abflusses auf dem niedrigeren Niveau befindet, und im übrigen auf im Wesentlichen demselben, höheren Niveau verbleibt, kann über weitgehend den gesamten Umfang eine besonders effiziente Kühlung der kritischen Bereiche an der obersten Ringnut und der Brennrauminulde gewährleistet werden. Eb sei erwannt, dass αer Kuhlkanal weitere Zu™ und Abflüsse aufweisen kann. Insbesondere können in seinem Verlauf ein oder mehrere Abflüsse, bevorzugt mit vergleichsweise kleinem Querschnitt, vorgesehen werden, um die Lagerung zwischen Pleuel und Kolbenbolzen zu schmieren. Im Bereich dieser Abflüsse muss sich der Kuhlkanal jedoch nicht notwendigerweise auf das niedrigere Niveau begeben, weil hier keine Verbreiterung notwendig ist.Because the cooling channel is located only in the region of the inlet and at least one outflow at the lower level, and remains at substantially the same, higher level, can be over largely the entire circumference of a particularly efficient cooling of the critical areas at the top Ring groove and the combustion chamber recess are guaranteed. It should be noted that the cooling channel may have additional flows and outflows. In particular, one or more drains, preferably with a comparatively small cross-section, may be provided in its course, in order to lubricate the bearing between connecting rod and piston pin. In the area of these outflows, however, the cooling channel does not necessarily have to go to the lower level because no broadening is necessary here.
Bevorzugte Weiterbildungen des erfmdungsgemaßen Kolbens sind m den weiteren Ansprüchen beschrieben.Preferred developments of the piston according to the invention are described in the further claims.
Im Hinblick auf die Anordnung des Kuhlkanals auf dem höheren Niveau hat es sich bei ersten Versuchen als gunstig erwiesen, wenn die ünterkante des Kuhlkanals auf diesem Niveau im Wesentlichen auf derselben Hohe ist, wie die Unterkante eines Rmgtragers für die oberste Ringnut. Hierdurch kann eine besonders gute Kühlung der genannten kritischen Bereiche erzielt werden.With regard to the arrangement of the Kuhlkanals at the higher level, it has proved in first attempts to be favorable if the ünterkante the Kuhlkanals at this level is substantially at the same height as the lower edge of a Rmgtragers for the uppermost annular groove. This can be a particularly good cooling of said critical areas can be achieved.
Dies gilt in gleicher Weise und ermöglicht darüber hinaus die gewünschte Querschnittsvergroßerung des Kuhlkanals im Bereich des Zu- und Abflusses, wenn sich das genannte untere Niveau etwa 3 - 5 mm, insbesondere 3,5 - 4 mm und besonders bevorzugt etwa 3,8 mm unterhalb des genannten höheren Niveaus befindet .This applies in the same way and also allows the desired cross-sectional enlargement of the cooling channel in the region of the inflow and outflow, when said lower level is about 3-5 mm, in particular 3.5-4 mm and particularly preferably about 3.8 mm below of the said higher level.
Wenngleich dies für die Kuhlleistung nicht unbedingt erforderlich ist, wird aufgrund der vorangehend geschilderten Umstände bevorzugt, dass der Querschnitt des Kuhlkanals im Bereich zumindest eines Zu- und/oder Abflusses gegenüber dem Rest des Kuhlkanals vergrößert ist.Although this is not absolutely necessary for the cooling performance, due to the circumstances described above, it is preferred that the cross-section of the cooling channel in the area of at least one inflow and / or outflow be enlarged relative to the remainder of the cooling channel.
Im Hinblick auf den Übergang von dem niedrigen zu dem höheren Niveau und umgekehrt wird ein allmählicher, geneigter Anstieg mit Knicken oder Stufen zwischen dem beispielsweise schrägen Anstieg und dem Bereich auf dem höheren bzw. niedrigeren Niveau vorgesehen.With respect to the transition from the lower level to the higher level and vice versa, a gradual, inclined rise is provided with kinks or steps between, for example, the inclined rise and the higher or lower level area.
Diejenigen Bereiche des Kühlkanals, die sich auf dem niedrigeren Niveau befinden, einschließlich der geneigten Übergänge zu dem höheren Niveau, können jeweils einen Winkel von etwa 50 - 70°, insbesondere etwa 60 - 65° einschließen.Those portions of the cooling channel that are at the lower level, including the inclined transitions to the higher level, may each include an angle of about 50-70 degrees, more preferably about 60-65 degrees.
Für die Querschnittsgestalt des Kuhlkanals wird derzeit bevorzugt, dass diese weitgehend oval ist, wobei sich die längere Achse des Ovals weitgehend in Richtung der Rotationsachse des Kolbens erstreckt, jedoch gegenüber dieser etwas geneigt sein kann. Für diese Neigung wird derzeit ein Winkel von etwa 7° und/oder eine Neigung, die an der Oberseite nach außen gerichtet ist, bevorzugt. Durch die im Allgemeinen ovale Gestaltung kann eine effiziente Kühlung des Bereichs "zwischen" oberster Ringnut und Brennraummulde gewahrleistet werden, und es können gleichzeitig die notwendigen Materialdicken eingehalten werden. Die Neigung unterstutzt diesen Effekt im Hinblick auf die typische Gestalt einer Brennraummulde.For the cross-sectional shape of the cooling channel is currently preferred that this is largely oval, with the longer axis of the oval extends substantially in the direction of the axis of rotation of the piston, but may be slightly inclined relative to this. For this inclination is currently an angle of about 7 ° and / or a slope, which is directed at the top to the outside, preferred. Due to the generally oval design, efficient cooling of the area "between" upper annular groove and combustion bowl can be ensured, and at the same time the necessary material thicknesses are maintained. The inclination supports this effect in view of the typical shape of a combustion bowl.
Schließlich wird derzeit ferner bevorzugt, dass sich Zu- und Abfluss diametral gegenüberliegen. Hierdurch, sowie durch eine derzeit ferner bevorzugte Symmetrie bezüglich der Rotationsachse des Kolbens kann der Kolben in einer beliebigen Orientierung eingebaut werden, und eine beliebige Öffnung kann als Zu™ oder Abfluss genutzt werden.Finally, it is currently further preferred that inflow and outflow be diametrically opposed. Thereby, as well as by a currently further preferred symmetry with respect to the axis of rotation of the piston, the piston can be installed in any orientation, and any opening can be used as an outlet or drain.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Nachfolgend wird ein beispielhaft m den Figuren dargestelltes Ausfuhrungsbeispiel naher erläutert. Es zeigen:In the following, an exemplary embodiment illustrated in the figures will be explained in more detail. Show it:
Fig. 1 eine perspektivische Darstellung eines Salzkerns, der bei der Herstellung des erfindungsgemaßen Kolbens verwendet Wxrd;Fig. 1 is a perspective view of a salt core used in the manufacture of the piston according to the invention Wxrd;
Fig. 2 eine geschnittene Seitenansicht eines Teils des m Fig. 1 gezeigten Salzkerns; undFIG. 2 is a side sectional view of a portion of the salt core shown in FIG. 1; FIG. and
Fig. 3 eine Schnittansicht des erfindungsgemaßen Kolbens.Fig. 3 is a sectional view of the inventive piston.
Ausführliche Beschreibung einer bevorzugten Ausfuhrungsform der ErfindungDetailed description of a preferred embodiment of the invention
In Fig. 1 ist zunächst m einer perspektivischen Ansicht der Salzkern 20 gezeigt, der zur Herstellung des erfindungsgemaßen Kolbens verwendet wird. Der Salzkern weist, wie dies für den spateren Kuhlkanal gilt, bei der gezeigten Ausfuhrungsform zwei diametral gegenüberliegende Bereiche auf, die hinsichtlich ihres Querschnitts gegenüber dem übrigen Kuhlkanal verbreitert sind und spater als Zu- und Abfluss 14 genutzt werden. Wie bereits in Fig. 1 durch die strichpunktierte Linie angedeutet ist, befindet sich der Kύhlkanal im Bereich von Zu- und Abfluss 14 auf einem niedrigeren Niveau, als der übrige Kuhlkanal. Die Bereiche des Kuhlkanals auf dem höheren Niveau gehen jeweils in der Umgebung vom Zu- und Abfluss 14 und auf beiden Seiten desselben durch Schrägen 18 von dem höheren 16 auf das niedrigere Niveau 12 über. Für Zu- und Abfluss 14 ist in Fig. 1 zusatzlich zu erkennen, dass die Verbreiterung des Querschnitts bei der besagten Ausführungsform in Richtung der Rotationsachse 22 (vgl. Fig. 2) erfolgt.In Fig. 1 m is first shown a perspective view of the salt core 20, which is used for the preparation of the inventive piston. The salt core, as is true for the later Kuhlkanal, in the embodiment shown on two diametrically opposite regions, which are widened in cross section with respect to the rest of the cooling channel and later be used as inflow and outflow 14. As already indicated in Fig. 1 by the dotted line, there is the Cooling channel in the region of inflow and outflow 14 at a lower level than the rest of the cooling channel. The areas of the cooling channel at the higher level in each case in the vicinity of the inflow and outflow 14 and on both sides of the same by sloping 18 from the higher 16 to the lower level 12 over. For inflow and outflow 14, it can additionally be seen in Fig. 1 that the broadening of the cross-section in the said embodiment takes place in the direction of the axis of rotation 22 (see Fig. 2).
In Fig. 2 sind ferner erneut die beiden Niveaus 12 und 16, sowie im Bereich des gezeigten Zu- oder Abflusses 14 die Schrägen 18 zu erkennen. Insbesondere ist anzumerken, dass der Querschnitt des Kuhlkanals mit Ausnahme des vergrößerten Bereichs am Zu- und Abfluss, jedoch einschließlich der Schrägen 18 weitgehend gleich bleibt. Bei der gezeigten Ausfuhrungsform des Kuhlkanals ist der Querschnitt weitgehend oval, wobei die längere Achse weitgehend parallel oder allenfalls mit einem spitzen Winkel zu der Rotationsachse 22 des Kolbens verläuft. Bei der gezeigten Ausfuhrungsform ist zwischen der Rotationsachse 22 des Kolbens und der längeren Achse des Ovals, das den Querschnitt des Kuhlkanals bildet, ein Winkel α von beispielsweise etwa 7° ausgebildet.2, the two levels 12 and 16, as well as in the region of the inflow or outflow 14 shown, the slopes 18 are further recognizable. In particular, it should be noted that the cross section of the cooling channel with the exception of the enlarged area at the inlet and outlet, but including the slopes 18 remains largely the same. In the embodiment of the cooling channel shown, the cross section is largely oval, with the longer axis extending substantially parallel or possibly at an acute angle to the axis of rotation 22 of the piston. In the embodiment shown, an angle α of, for example, about 7 ° is formed between the axis of rotation 22 of the piston and the longer axis of the oval, which forms the cross section of the cooling channel.
In Fig. 3 ist ergänzend zu erkennen, wie der Kuhlkanal 24 durch die erfindungsgernaße Maßnahme in gunstiger Weise auf das Niveau eines Ringtragers 26 und der Brennraummulde 28 gebracht werden kann. Durch die in Richtung der Rotationsachse 22 des Kolbens 10 ovale Form passt der Kuhlkanal 24 in den Bereich zwischen dem Ringtrager 26 und der Brennraummulde 28 und kann diese kritischen Zonen besonders effizient kühlen, ohne die Festigkeit durch zu geringe Materialdicken zu gefährden. In Fig. 3 ist insbesondere zu erkennen, dass der Kuhlkanal 24 sich bei der gezeigten Ausfuhrungsform im Hinblick auf seine ünterkante weitgehend auf dem Niveau der ünterkante des Ringtragers 26 und sogar ein wenig oberhalb des Bodens der Brennraummulde 28 befindet. Wie in Kombination mit Fig. 2 zu erkennen ist, können die Bereiche an Zu- und Abfluss auch bei der Gestaltung gemäß Fig. 3 vergrößert werden, ohne die Materialdicke zwischen Ringtrager 26 und Brennraummulde 28 zu gefährden, da der Kuhlkanal 24 in diesen Bereichen auf das niedrigere Niveau 12 abgesenkt ist. In Fig. 3 can be seen in addition to how the Kuhlkanal 24 can be brought by the erfindungsgernaße measure in a favorable manner to the level of a ring carrier 26 and the combustion bowl 28. By virtue of the oval shape in the direction of the axis of rotation 22 of the piston 10, the cooling channel 24 fits into the region between the annular carrier 26 and the combustion bowl 28 and can cool these critical zones particularly efficiently without jeopardizing the strength due to material thicknesses which are too low. In particular, it can be seen in FIG. 3 that, in the embodiment shown, the cooling channel 24 is largely at the level of the lower edge of the annular carrier 26 and even slightly above the bottom of the combustion bowl 28 with respect to its lower edge located. As can be seen in combination with Fig. 2, the areas of inflow and outflow can be increased even in the design of FIG. 3, without jeopardizing the material thickness between ring carrier 26 and combustion bowl 28, since the cooling channel 24 in these areas the lower level 12 is lowered.

Claims

Patentansprüche claims
1. Kolben (10) für einen Verbrennungsmotor, mit zumindest einem Kuhlkanal (24), der sich ausschließlich im Bereich zumindest eines Zu- und zumindest eines Abflusses (14) auf einem niedrigen, von dem Kolbenboden vergleichsweise entfernten Niveau (12) und im Übrigen auf einem gleichbleibend höheren, näher zum Kolbenboden gelegenen Niveau (16) befindet, und der zwischen den auf dem niedrigen (12) und dem hohen Niveau (16) gelegenen Bereichen schräge Anstiege (18) aufweist.1. piston (10) for an internal combustion engine, with at least one Kuhlkanal (24) located exclusively in the region of at least one inlet and at least one outflow (14) on a low, relatively remote from the piston head level (12) and the rest is at a consistently higher, closer to the piston crown level (16), and between the low (12) and the high level (16) located areas inclined slopes (18).
2. Kolben (10) nach Anspruch 1, dadurch gekennzeichnet, dass sich der Kuhlkanal (24) auf seinem höheren Niveau2. Piston (10) according to claim 1, characterized in that the cooling channel (24) at its higher level
(16) mit seiner Unterkante im Wesentlichen auf demselben Niveau wie eine Unterkante eines Ringtragers (26) befindet .(16) with its lower edge substantially at the same level as a lower edge of a ring carrier (26).
3. Kolben (10) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass sich das niedrige Niveau etwa 3 - 5 mm, insbesondere etwa 3,5 - 4 mm und bevorzugt etwa 3,8 mm unterhalb des höheren Niveaus (16) befindet,3. piston (10) according to claim 1 or 2, characterized in that the low level is about 3 - 5 mm, in particular about 3.5 - 4 mm and preferably about 3.8 mm below the higher level (16),
4. Kolben (10) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Kuhlkanal im Bereich zumindest eines Zu- und/oder Abflusses (14) einen gegenüber dem restlichen Verlauf des Kuhlkanals (24) vergrößerten Querschnitt aufweist.4. piston (10) according to any one of the preceding claims, characterized in that the Kuhlkanal in the region of at least one inflow and / or outflow (14) has a relation to the remaining course of the Kuhlkanals (24) enlarged cross-section.
5. Kolben (10) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Bereiche des Kuhlkanals (24) auf dem niedrigen Niveau (12), einschließlich der geneigten Übergänge (18), zu dem höheren Niveau (16) einen Winkel von etwa 50 - 70°, insbesondere etwa 60 - 65° abdecken. Piston (10) according to one of the preceding claims, characterized in that the areas of the cooling channel (24) at the low level (12) including the inclined transitions (18) to the higher level (16) are at an angle of approximately 50 - 70 °, in particular about 60 - 65 ° cover.
6. Kolben (10) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Kuhlkanal (28) einen ovalen Querschnitt mit einer längeren Achse, die im Wesentlichen in Richtung der Rotationsachse (22} des Kolbens (10) verlauft, aufweist.6. Piston (10) according to any one of the preceding claims, characterized in that the cooling channel (28) has an oval cross-section with a longer axis which extends substantially in the direction of the axis of rotation (22} of the piston (10).
7. Kolben (10) nach Anspruch 6, dadurch gekennzeichnet, dass die im Querschnitt längere Achse des Kuhlkanals bezüglich der Rotationsachse (22) des Kolbens (10) um etwa 5 - 10°, insbesondere etwa 7° nach außen geneigt ist .7. piston (10) according to claim 6, characterized in that the cross-sectionally longer axis of the Kuhlkanals with respect to the axis of rotation (22) of the piston (10) by about 5 - 10 °, in particular about 7 ° is inclined outwardly.
8. Kolben (10) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass sich Zu- und Abfluss (14) diametral gegenüberliegen. 8. piston (10) according to any one of the preceding claims, characterized in that inlet and outlet (14) are diametrically opposed.
EP09765817A 2008-06-20 2009-06-15 Piston for an internal combustion engine Not-in-force EP2288800B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09765817T PL2288800T3 (en) 2008-06-20 2009-06-15 Piston for an internal combustion engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008002571A DE102008002571A1 (en) 2008-06-20 2008-06-20 Piston for an internal combustion engine
PCT/EP2009/057349 WO2009153237A1 (en) 2008-06-20 2009-06-15 Piston for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP2288800A1 true EP2288800A1 (en) 2011-03-02
EP2288800B1 EP2288800B1 (en) 2012-08-08

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Country Status (9)

Country Link
US (1) US9382869B2 (en)
EP (1) EP2288800B1 (en)
JP (1) JP2011524958A (en)
CN (2) CN105804882A (en)
BR (1) BRPI0914149A2 (en)
DE (1) DE102008002571A1 (en)
ES (1) ES2392490T3 (en)
PL (1) PL2288800T3 (en)
WO (1) WO2009153237A1 (en)

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Publication number Priority date Publication date Assignee Title
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JP2011524958A (en) 2011-09-08
ES2392490T3 (en) 2012-12-11
PL2288800T3 (en) 2012-12-31
US9382869B2 (en) 2016-07-05
WO2009153237A1 (en) 2009-12-23
CN102046953A (en) 2011-05-04
BRPI0914149A2 (en) 2015-10-20
US20110180025A1 (en) 2011-07-28
EP2288800B1 (en) 2012-08-08
DE102008002571A1 (en) 2009-12-31
CN105804882A (en) 2016-07-27

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