EP3262289A1 - Piston for an internal combustion engine - Google Patents

Piston for an internal combustion engine

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Publication number
EP3262289A1
EP3262289A1 EP16706855.0A EP16706855A EP3262289A1 EP 3262289 A1 EP3262289 A1 EP 3262289A1 EP 16706855 A EP16706855 A EP 16706855A EP 3262289 A1 EP3262289 A1 EP 3262289A1
Authority
EP
European Patent Office
Prior art keywords
piston
cooling oil
cooling
cooling channel
piston according
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.)
Withdrawn
Application number
EP16706855.0A
Other languages
German (de)
French (fr)
Inventor
Joachim Schmidt
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
Original Assignee
Mahle International 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 Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP3262289A1 publication Critical patent/EP3262289A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/10—Cooling by flow of coolant through pistons
    • 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

Definitions

  • the present invention relates to a piston for an internal combustion engine having a piston head and a piston skirt, having a arranged in the piston head, annular grooves for receiving piston rings having circumferential annular portion and a piston head in the amount of the annular portion circumferential cooling channel having inlet openings and drain holes for cooling oil.
  • the object of the present invention is to further develop a generic piston so that improved cooling is achieved by means of cooling oil.
  • the solution is that at least in the region of an inlet opening for cooling oil, a cavity for receiving cooling oil is provided, which opens into the cooling channel.
  • the piston according to the invention is characterized in that an additional shaker effect is achieved in the region of at least one inlet opening for cooling oil, since the cooling oil can move freely in the cavity provided according to the invention and is moved up and down in the cavity during engine operation due to the stroke movement of the piston , This results in an improved heat transfer from Piston head in the direction of the piston skirt, where the heat is dissipated over a large area.
  • the height (H) of the cavity and the height (h) of the cooling channel in the ratio 5: 2 are formed to each other to obtain an optimally improved heat transfer.
  • a further advantageous development provides that the cross-sectional area (Q) of the cavity and the cross-sectional area (q) of the cooling channel in the ratio 4: 1, 2 to 4: 1, 5 are formed to each other. Also with this measure, an optimized heat transfer is achieved.
  • the piston according to the invention advantageously has a pressure side (DS) and a counter-pressure side (GDS), wherein an inlet opening for cooling oil in the region of the pressure side (DS) and the counter-pressure side (GDS) is provided. If both inlet openings are provided with a cavity according to the invention, the heat generated during engine operation is removed even more efficiently.
  • the cooling channel may have additional bores and / or ribs for controlling the residence time of the cooling oil accommodated in the cooling channel.
  • the compression height KH of the piston according to the invention is preferably 30 to 35 mm, preferably 32 mm, so that such a piston is suitable for use in motor racing.
  • the piston according to the invention is preferably designed as a box piston for reasons of weight savings.
  • those in the piston skirt provided with hub bores equipped piston hubs be provided with support ribs in order to increase the rigidity of the piston in itself.
  • the piston according to the invention is preferably made of a material based on aluminum in order to further reduce the moving mass of the piston during engine operation.
  • the piston according to the invention can be produced from a piston upper part and a piston lower part in order to optimally adapt the selection of suitable materials to the loads of the piston during engine operation.
  • the piston upper part and the piston lower part are preferably firmly connected to one another by means of a high-temperature-resistant adhesive based on epoxy or ceramic.
  • the joining seam between the upper piston part and the lower piston part is preferably arranged between the first annular groove and the second annular groove of the annular part.
  • Figure 1 shows an embodiment of a piston according to the invention in
  • Figure 2 is a section along the line II - II in Figure 1;
  • Figure 3 is a section along the line III - III in Figure 1;
  • FIG. 4 shows a plan view of the piston according to FIG. 1.
  • Figures 1 to 4 show an embodiment of a piston 10 according to the invention.
  • the piston 10 is formed in the embodiment as a box piston.
  • the piston 10 has a piston head 1 1 with a piston head 12, a combustion bowl 13, a circumferential top land 14 and a circumferential ring portion 15 with annular grooves 16 a, 16 b, 16 c for receiving piston rings (not shown).
  • a circumferential cooling channel 17 is provided in the amount of the ring section .
  • the piston 10 also has a piston shaft 18, which is provided in known manner with piston hubs 19, in which hub bores 21 for receiving a piston pin (not shown) are introduced.
  • the piston hubs 19 are connected to each other via running surfaces 22a, 22b.
  • the illustrated embodiment of the piston 10 according to the invention has in its inner space 10a on its pressure side DS and its counter-pressure side GDS, which are defined by its running surfaces 22a, 22b, depending on a cavity 24a, 24b.
  • Each cavity 24a, 24b is provided with an inlet opening 23a, 23b for cooling oil (see FIG.
  • Each cavity 24a, 24b projects into the interior 10a of the piston 10 in the direction of the piston bosses 19 and opens in the region of the piston head 1 1 in the circumferential cooling channel 17.
  • each cavity 24a, 24b and the inner wall of its associated tread 22a, 22b form a feed hopper 25a, 25b for cooling oil, which opens via the corresponding inlet opening 23a, 23b in the respective cavity 24a, 24b (see Figure 1).
  • the cavities 24a, 24b act as shaker spaces, in which the cooling oil is moved up and down in known manner ("shaker effect"), resulting in improved heat removal from the region of the piston head 1 1 in the direction the piston stem 18, where the heat is dissipated via the raceways 22a, 22b.
  • each cavity 24a, 24b and the height h of the cooling channel 17 is approximately 5: 2 to each other.
  • the cross-sectional area (Q) of each cavity 24a, 24b and the cross-sectional area (q) of the cooling channel 17 are formed in the embodiment approximately in the ratio 4: 1, 35.
  • the cooling channel 17 of the illustrated embodiment of a piston according to the invention has, in a manner known per se, drain openings 26 for cooling oil, through which the cooling oil is directed in the direction of the interior 10a of the piston 10.
  • the cooling channel 17 of the illustrated embodiment of a piston 10 according to the invention also has, in a conventional manner, additional bores 27 and ribs 28 for controlling the residence time of the cooling oil received in the cooling passage 17 during engine operation.
  • the embodiment of the piston 10 according to the invention shown in the figures is formed from a piston upper part 31 and a piston lower part 32, preferably made of a material based on aluminum and fixed by means of a high temperature resistant (up to 300 ° C) adhesive based on epoxy resins or ceramics connected with each other.
  • the joining seam 34 between the upper piston part 31 and the lower piston part 32 is arranged in the exemplary embodiment between the first annular groove 16a and the second annular groove 16b.
  • the piston 10 has in the embodiment a compression height KH of 32 mm and is suitable in this embodiment for use in motor racing.
  • the piston hubs 19 have support ribs 33 in the region of the hub bores 21.
  • the support ribs 33 support the piston head 1 1 in the region below its ring portion 15 relative to the piston boss 19, such that the risk of deformation of the piston head 1 1 in the region of its ring portion 15 during engine operation is at least reduced.

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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)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

The present invention relates to a piston (10) for an internal combustion engine, having a piston head (11) and a piston skirt (18), having a circumferential ring belt (15) which is arranged in the piston head (11) and has ring grooves (16a, 16b, 16c) for receiving piston rings, and a cooling duct (17) which runs around in the piston head (11) at the level of the ring belt (15) and has feed openings (23a, 23b) and discharge openings (26, 27) for cooling oil. It is provided according to the invention that a cavity (24a, 24b) for receiving cooling oil is provided at least in the region of a feed opening (23a, 23b) for cooling oil, which cavity (24a, 24b) opens into the cooling duct (17).

Description

Kolben für einen Verbrennungsmotor  Piston for an internal combustion engine
Die vorliegende Erfindung betrifft einen Kolben für einen Verbrennungsmotor mit einem Kolbenkopf und einem Kolbenschaft, mit einer im Kolbenkopf angeordneten, Ringnuten zur Aufnahme von Kolbenringen aufweisenden umlaufenden Ringpartie und einem im Kolbenkopf in Höhe der Ringpartie umlaufenden Kühlkanal, welcher Zulauföffnungen und Ablauföffnungen für Kühlöl aufweist. The present invention relates to a piston for an internal combustion engine having a piston head and a piston skirt, having a arranged in the piston head, annular grooves for receiving piston rings having circumferential annular portion and a piston head in the amount of the annular portion circumferential cooling channel having inlet openings and drain holes for cooling oil.
Gattungsgemäße Kolben sind bekannt. Moderne Kolben zeichnen sich durch eine geringe Bauhöhe und damit eine geringe Kompressionshöhe aus. Daher ist eine effektive Kühlung des Kolbens im Motorbetrieb mittels Kühlöl immer schwieriger zu realisieren, da für einen funktionsgerechten Kühlkanal immer weniger Raum vorhanden ist. Generic pistons are known. Modern pistons are characterized by a low height and thus a low compression height. Therefore, an effective cooling of the piston in engine operation by means of cooling oil is increasingly difficult to realize because less and less space is available for a functional cooling duct.
Die Aufgabe der vorliegenden Erfindung besteht darin, einen gattungsgemäßen Kolben so weiterzuentwickeln, dass eine verbesserte Kühlung mittels Kühlöl erzielt wird. The object of the present invention is to further develop a generic piston so that improved cooling is achieved by means of cooling oil.
Die Lösung besteht darin, dass zumindest im Bereich einer Zulauföffnung für Kühlöl ein Hohlraum zur Aufnahme von Kühlöl vorgesehen ist, welcher in den Kühlkanal mündet. The solution is that at least in the region of an inlet opening for cooling oil, a cavity for receiving cooling oil is provided, which opens into the cooling channel.
Der erfindungsgemäße Kolben zeichnet sich dadurch aus, dass im Bereich mindestens einer Zulauföffnung für Kühlöl ein zusätzlicher Shaker-Effekt erzielt wird, da sich das Kühlöl im erfindungsgemäß vorgesehenen Hohlraum frei bewegen kann und im Motorbetrieb aufgrund der Hubbewegung des Kolbens im Hohlraum auf und ab bewegt wird. Daraus resultiert ein verbesserter Wärmetransport vom Kolbenkopf in Richtung des Kolbenschafts, wo die Wärme großflächig abgeleitet wird. The piston according to the invention is characterized in that an additional shaker effect is achieved in the region of at least one inlet opening for cooling oil, since the cooling oil can move freely in the cavity provided according to the invention and is moved up and down in the cavity during engine operation due to the stroke movement of the piston , This results in an improved heat transfer from Piston head in the direction of the piston skirt, where the heat is dissipated over a large area.
Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen. Vorzugsweise sind die Höhe (H) des Hohlraums und die Höhe (h) des Kühlkanals im Verhältnis 5:2 zueinander ausgebildet, um einen optimal verbesserten Wärmetransport zu erhalten. Advantageous developments emerge from the subclaims. Preferably, the height (H) of the cavity and the height (h) of the cooling channel in the ratio 5: 2 are formed to each other to obtain an optimally improved heat transfer.
Eine weitere vorteilhafte Weiterbildung sieht vor, dass die Querschnittsfläche (Q) des Hohlraums und die Querschnittsfläche (q) des Kühlkanals im Verhältnis 4:1 ,2 bis 4:1 ,5 zueinander ausgebildet sind. Auch mit dieser Maßnahme wird ein optimierter Wärmetransport erzielt. A further advantageous development provides that the cross-sectional area (Q) of the cavity and the cross-sectional area (q) of the cooling channel in the ratio 4: 1, 2 to 4: 1, 5 are formed to each other. Also with this measure, an optimized heat transfer is achieved.
Der erfindungsgemäße Kolben weist in vorteilhafter Weise eine Druckseite (DS) und eine Gegendruckseite (GDS) auf, wobei je eine Zulauföffnung für Kühlöl im Bereich der Druckseite (DS) und der Gegendruckseite (GDS) vorgesehen ist. Wenn beide Zulauföffnungen mit einem erfindungsgemäßen Hohlraum versehen sind, wird die im Motorbetrieb anfallende Wärmemenge noch effizienter abtransportiert. The piston according to the invention advantageously has a pressure side (DS) and a counter-pressure side (GDS), wherein an inlet opening for cooling oil in the region of the pressure side (DS) and the counter-pressure side (GDS) is provided. If both inlet openings are provided with a cavity according to the invention, the heat generated during engine operation is removed even more efficiently.
Der Kühlkanal kann zusätzliche Bohrungen und/oder Rippen zur Steuerung der Verweildauer des im Kühlkanal aufgenommenen Kühlöls aufweisen. The cooling channel may have additional bores and / or ribs for controlling the residence time of the cooling oil accommodated in the cooling channel.
Die Kompressionshöhe KH des erfindungsgemäßen Kolbens beträgt vorzugsweise 30 bis 35 mm, bevorzugt 32 mm, so dass ein derartiger Kolben zur Verwendung im Rennsport geeignet ist. The compression height KH of the piston according to the invention is preferably 30 to 35 mm, preferably 32 mm, so that such a piston is suitable for use in motor racing.
Der erfindungsgemäße Kolben ist aus Gründen der Gewichtsersparnis vorzugsweise als Kastenkolben ausgebildet. In diesem Fall können die im Kolbenschaft vorgesehenen, mit Nabenbohrungen ausgestatteten Kolbennaben mit Stützrippen versehen sein, um die Steifigkeit des Kolbens in sich zu erhöhen. The piston according to the invention is preferably designed as a box piston for reasons of weight savings. In this case, those in the piston skirt provided with hub bores equipped piston hubs be provided with support ribs in order to increase the rigidity of the piston in itself.
Der erfindungsgemäße Kolben ist vorzugsweise aus einem Werkstoff auf der Basis von Aluminium hergestellt, um die bewegte Masse des Kolbens im Motorbetrieb weiter zu reduzieren. The piston according to the invention is preferably made of a material based on aluminum in order to further reduce the moving mass of the piston during engine operation.
Der erfindungsgemäße Kolben kann aus einem Kolbenoberteil und einem Kolbenunterteil hergestellt sein, um die Auswahl geeigneter Werkstoffe optimal an die Belastungen des Kolbens im Motorbetrieb anzupassen. In diesem Fall sind das Kolbenoberteil und das Kolbenunterteil vorzugsweise mittels eines hochtem- peraturfesten Klebstoffs auf Epoxid- oder Keramikbasis fest miteinander verbunden. Die Fügenaht zwischen dem Kolbenoberteil und dem Kolbenunterteil ist bevorzugt zwischen der ersten Ringnut und der zweiten Ringnut der Ringpartie angeordnet. The piston according to the invention can be produced from a piston upper part and a piston lower part in order to optimally adapt the selection of suitable materials to the loads of the piston during engine operation. In this case, the piston upper part and the piston lower part are preferably firmly connected to one another by means of a high-temperature-resistant adhesive based on epoxy or ceramic. The joining seam between the upper piston part and the lower piston part is preferably arranged between the first annular groove and the second annular groove of the annular part.
Ein Ausführungsbeispiel der vorliegenden Erfindung wird im Folgenden anhand der beigefügten Zeichnungen näher beschrieben. Es zeigen in einer schematischen, nicht maßstabsgetreuen Darstellung: An embodiment of the present invention will be described below with reference to the accompanying drawings. In a schematic, not to scale representation:
Figur 1 ein Ausführungsbeispiel eines erfindungsgemäßen Kolbens im Figure 1 shows an embodiment of a piston according to the invention in
Schnitt, entlang der Linie I - 1 in Figur 4;  Section, along the line I - 1 in Figure 4;
Figur 2 einen Schnitt entlang der Linie II - II in Figur 1 ; Figure 2 is a section along the line II - II in Figure 1;
Figur 3 einen Schnitt entlang der Linie III - III in Figur 1 ; Figure 3 is a section along the line III - III in Figure 1;
Figur 4 eine Draufsicht auf den Kolben gemäß Figur 1 . Die Figuren 1 bis 4 zeigen ein Ausführungsbeispiel eines erfindungsgemäßen Kolbens 10. Der Kolben 10 ist im Ausführungsbeispiel als Kastenkolben ausgebildet. Der Kolben 10 weist einen Kolbenkopf 1 1 mit einem Kolbenboden 12, einer Verbrennungsmulde 13, einem umlaufenden Feuersteg 14 sowie einer umlaufenden Ringpartie 15 mit Ringnuten 16a, 16b, 16c zur Aufnahme von Kolbenringen (nicht darstellt) auf. In Höhe der Ringpartie ist ein umlaufender Kühlkanal 17 vorgesehen. FIG. 4 shows a plan view of the piston according to FIG. 1. Figures 1 to 4 show an embodiment of a piston 10 according to the invention. The piston 10 is formed in the embodiment as a box piston. The piston 10 has a piston head 1 1 with a piston head 12, a combustion bowl 13, a circumferential top land 14 and a circumferential ring portion 15 with annular grooves 16 a, 16 b, 16 c for receiving piston rings (not shown). In the amount of the ring section a circumferential cooling channel 17 is provided.
Der Kolben 10 weist ferner einen Kolbenschaft 18 auf, der in an sich bekannter Weise mit Kolbennaben 19 versehen ist, in welche Nabenbohrungen 21 zur Aufnahme eines Kolbenbolzens (nicht dargestellt) eingebracht sind. Die Kolbennaben 19 sind über Laufflächen 22a, 22b miteinander verbunden. The piston 10 also has a piston shaft 18, which is provided in known manner with piston hubs 19, in which hub bores 21 for receiving a piston pin (not shown) are introduced. The piston hubs 19 are connected to each other via running surfaces 22a, 22b.
Das dargestellte Ausführungsbeispiel des erfindungsgemäßen Kolbens 10 weist in seinem Innenraum 10a auf seiner Druckseite DS und seiner Gegendruckseite GDS, welche über seine Laufflächen 22a, 22b definiert sind, je einen Hohlraum 24a, 24b auf. Jeder Hohlraum 24a, 24b ist mit einer Zulauföffnung 23a, 23b für Kühlöl versehen (vgl. Figur 1 ). Jeder Hohlraum 24a, 24b ragt in den Innenraum 10a des Kolbens 10 in Richtung der Kolbennaben 19 und mündet im Bereich des Kolbenkopfes 1 1 in den umlaufenden Kühlkanal 17. Die Außenwand jedes Hohlraums 24a, 24b und die Innenwand der ihm zugeordneten Lauffläche 22a, 22b bilden einen Zulauftrichter 25a, 25b für Kühlöl, der über die entsprechende Zulauföffnung 23a, 23b in den jeweiligen Hohlraum 24a, 24b mündet (vgl. Figur 1 ). The illustrated embodiment of the piston 10 according to the invention has in its inner space 10a on its pressure side DS and its counter-pressure side GDS, which are defined by its running surfaces 22a, 22b, depending on a cavity 24a, 24b. Each cavity 24a, 24b is provided with an inlet opening 23a, 23b for cooling oil (see FIG. Each cavity 24a, 24b projects into the interior 10a of the piston 10 in the direction of the piston bosses 19 and opens in the region of the piston head 1 1 in the circumferential cooling channel 17. The outer wall of each cavity 24a, 24b and the inner wall of its associated tread 22a, 22b form a feed hopper 25a, 25b for cooling oil, which opens via the corresponding inlet opening 23a, 23b in the respective cavity 24a, 24b (see Figure 1).
Die Hohlräume 24a, 24b wirken erfindungsgemäß als Shaker-Räume, in denen das Kühlöl während des Motorbetriebs in an sich bekannter Weise auf und ab bewegt wird (so genannter„Shaker-Effekt"). Daraus resultiert erfindungsgemäß eine verbesserte Wärmeabfuhr aus der Region des Kolbenkopfes 1 1 in Richtung des Kolbenschafts 18, wo die Wärme über die Laufflächen 22a, 22b abgeleitet wird. According to the invention, the cavities 24a, 24b act as shaker spaces, in which the cooling oil is moved up and down in known manner ("shaker effect"), resulting in improved heat removal from the region of the piston head 1 1 in the direction the piston stem 18, where the heat is dissipated via the raceways 22a, 22b.
Im dargestellten Ausführungsbeispiel ist die Höhe H jedes Hohlraums 24a, 24b und die Höhe h des Kühlkanals 17 etwa im Verhältnis 5:2 zueinander ausgebildet. Die Querschnittsfläche (Q) jedes Hohlraums 24a, 24b und die Querschnittsfläche (q) des Kühlkanals 17 sind im Ausführungsbeispiel etwa im Verhältnis 4:1 ,35 ausgebildet. In the illustrated embodiment, the height H of each cavity 24a, 24b and the height h of the cooling channel 17 is approximately 5: 2 to each other. The cross-sectional area (Q) of each cavity 24a, 24b and the cross-sectional area (q) of the cooling channel 17 are formed in the embodiment approximately in the ratio 4: 1, 35.
Der Kühlkanal 17 des dargestellten Ausführungsbeispiels eines erfindungsgemäßen Kolbens weist in an sich bekannter Weise Ablauföffnungen 26 für Kühlöl auf, durch welche das Kühlöl in Richtung des Innenraums 10a des Kolbens 10 geleitet wird. Dadurch wird zum Einen eine zusätzliche Kühlung der Unterseite 12a des Kolbenbodens 12 und zum Anderen eine zusätzliche Schmierung der Nabenbohrungen 21 und des im Motorbetrieb darin aufgenommenen Kolbenbolzens erzielt. The cooling channel 17 of the illustrated embodiment of a piston according to the invention has, in a manner known per se, drain openings 26 for cooling oil, through which the cooling oil is directed in the direction of the interior 10a of the piston 10. As a result, on the one hand additional cooling of the underside 12a of the piston crown 12 and, on the other hand, additional lubrication of the hub bores 21 and of the piston pin accommodated therein during engine operation are achieved.
Der Kühlkanal 17 des dargestellten Ausführungsbeispiels eines erfindungsgemäßen Kolbens 10 weist ferner in an sich bekannter Weise zusätzliche Bohrungen 27 und Rippen 28 zur Steuerung der Verweildauer des im Kühlkanal 17 im Motorbetrieb aufgenommenen Kühlöls auf. The cooling channel 17 of the illustrated embodiment of a piston 10 according to the invention also has, in a conventional manner, additional bores 27 and ribs 28 for controlling the residence time of the cooling oil received in the cooling passage 17 during engine operation.
Das in den Figuren dargestellte Ausführungsbeispiel des erfindungsgemäßen Kolbens 10 ist aus einem Kolbenoberteil 31 und einem Kolbenunterteil 32 gebildet, die vorzugweise einem Werkstoff auf der Basis von Aluminium hergestellt und mittels eines hochtemperaturfesten (bis 300°C) Klebstoffs auf der Basis von Epoxidharzen oder Keramiken fest miteinander verbunden. Die Fügenaht 34 zwischen dem Kolbenoberteil 31 und dem Kolbenunterteil 32 ist im Ausführungsbeispiel zwischen der ersten Ringnut 16a und der zweiten Ringnut 16b angeordnet. Der Kolben 10 weist im Ausführungsbeispiel eine Kompressionshöhe KH von 32 mm auf und ist in dieser Ausgestaltung zur Verwendung im Automobilrennsport geeignet. The embodiment of the piston 10 according to the invention shown in the figures is formed from a piston upper part 31 and a piston lower part 32, preferably made of a material based on aluminum and fixed by means of a high temperature resistant (up to 300 ° C) adhesive based on epoxy resins or ceramics connected with each other. The joining seam 34 between the upper piston part 31 and the lower piston part 32 is arranged in the exemplary embodiment between the first annular groove 16a and the second annular groove 16b. The piston 10 has in the embodiment a compression height KH of 32 mm and is suitable in this embodiment for use in motor racing.
Als zusätzliche Stabilisierung bzw. Versteifung des Kolbens 10 in weisen die Kolbennaben 19 im Bereich der Nabenbohrungen 21 Stützrippen 33 auf. Die Stützrippen 33 stützen den Kolbenkopf 1 1 im Bereich unterhalb seiner Ringpartie 15 gegenüber den Kolbennaben 19 ab, derart, dass die Gefahr von Verformungen des Kolbenkopfs 1 1 im Bereich seiner Ringpartie 15 während des Motorbetriebs zumindest reduziert ist. As an additional stabilization or stiffening of the piston 10, the piston hubs 19 have support ribs 33 in the region of the hub bores 21. The support ribs 33 support the piston head 1 1 in the region below its ring portion 15 relative to the piston boss 19, such that the risk of deformation of the piston head 1 1 in the region of its ring portion 15 during engine operation is at least reduced.

Claims

Ansprüche claims
1 . Kolben (10) für einen Verbrennungsmotor, mit einem Kolbenkopf (1 1 ) und einem Kolbenschaft (18), mit einer im Kolbenkopf (1 1 ) angeordneten, Ringnuten (16a, 16b, 16c) zur Aufnahme von Kolbenringen aufweisenden umlaufenden Ringpartie (15) und einem im Kolbenkopf (1 1 ) in Höhe der Ringpartie (15) umlaufenden Kühlkanal (17), welcher Zulauföffnungen (23a, 23b) und Ablauföffnungen (26, 27) für Kühlöl aufweist, dadurch gekennzeichnet, dass zumindest im Bereich einer Zulauföffnung (23a, 23b) für Kühlöl ein Hohlraum (24a, 24b) zur Aufnahme von Kühlöl vorgesehen ist, welcher in den Kühlkanal (17) mündet. 1 . Piston (10) for an internal combustion engine, with a piston head (1 1) and a piston shaft (18), with a in the piston head (1 1) arranged annular grooves (16 a, 16 b, 16 c) for receiving piston rings having circumferential annular portion (15) and a in the piston head (1 1) in the amount of the ring section (15) encircling the cooling channel (17), which inlet openings (23a, 23b) and drain openings (26, 27) for cooling oil, characterized in that at least in the region of an inlet opening (23a , 23b) for cooling oil, a cavity (24a, 24b) is provided for receiving cooling oil, which opens into the cooling channel (17).
2. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass die Höhe (H) des mindestens einen Hohlraums (24a, 24b) und die Höhe (h) des Kühlkanals (17) im Verhältnis 5:2 zueinander ausgebildet sind. 2. Piston according to claim 1, characterized in that the height (H) of the at least one cavity (24a, 24b) and the height (h) of the cooling channel (17) in the ratio 5: 2 are formed to each other.
3. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass die Querschnittsfläche (Q) des mindestens einen Hohlraums (24a, 24b) und die Querschnittsfläche (q) des Kühlkanals (17) im Verhältnis 4:1 ,2 bis 4:1 ,5 zueinander ausgebildet sind. 3. Piston according to claim 1, characterized in that the cross-sectional area (Q) of the at least one cavity (24a, 24b) and the cross-sectional area (q) of the cooling channel (17) in the ratio 4: 1, 2 to 4: 1, 5 to each other are formed.
4. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass er eine Druckseite (DS) und eine Gegendruckseite (GDS) aufweist, und dass je eine Zulauföffnung (23a, 23b) für Kühlöl im Bereich der Druckseite (DS) und der Gegendruckseite (GDS) vorgesehen ist. 4. Piston according to claim 1, characterized in that it has a pressure side (DS) and a counterpressure side (GDS), and that in each case an inlet opening (23a, 23b) for cooling oil in the region of the pressure side (DS) and the counterpressure side (GDS) is provided.
5. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass der Kühlkanal (17) Bohrungen (27) und/oder Rippen (28) zur Steuerung der Verweildauer des im Kühlkanal (17) aufgenommenen Kühlöls aufweist. 5. Piston according to claim 1, characterized in that the cooling channel (17) bores (27) and / or ribs (28) for controlling the residence time of the cooling channel (17) received cooling oil.
6. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass er eine Kompressionshöhe (KH) von 30 bis 35 mm aufweist.  6. Piston according to claim 1, characterized in that it has a compression height (KH) of 30 to 35 mm.
7. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass er als Kastenkolben ausgebildet ist. 7. Piston according to claim 1, characterized in that it is designed as a box piston.
8. Kolben nach Anspruch 7, dadurch gekennzeichnet, dass im Kolbenschaft (18) Nabenbohrungen (21 ) aufweisende Kolbennaben (19) vorgesehen sind und dass Stützrippen (33) im Bereich der Kolbennaben (19) vorgesehen sind. 8. Piston according to claim 7, characterized in that in the piston shaft (18) hub bores (21) having piston bosses (19) are provided and that support ribs (33) in the region of the piston bosses (19) are provided.
9. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass er aus einem 9. Piston according to claim 1, characterized in that it consists of a
Werkstoff auf der Basis von Aluminium hergestellt ist.  Material is made on the basis of aluminum.
10. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass er aus einem Kolbenoberteil (31 ) und einem Kolbenunterteil (32) hergestellt ist. 10. Piston according to claim 1, characterized in that it is made of a piston upper part (31) and a piston lower part (32).
1 1 . Kolben nach Anspruch 10, dadurch gekennzeichnet, dass das Kolbenoberteil (31 ) und das Kolbenunterteil (32) mittels eines hochtemperaturfesten Klebstoffs auf Epoxid- oder Keramikbasis fest verbunden sind. 1 1. Piston according to claim 10, characterized in that the upper piston part (31) and the lower piston part (32) are firmly connected by means of a high temperature resistant adhesive based on epoxy or ceramic.
12. Kolben nach Anspruch 10, dadurch gekennzeichnet, dass eine Fügenaht (34) vorgesehen ist, die zwischen der ersten Ringnut (16a) und der zweiten Ringnut (16b) der umlaufenden Ringpartie (15) angeordnet ist. 12. Piston according to claim 10, characterized in that a joining seam (34) is provided, which is arranged between the first annular groove (16a) and the second annular groove (16b) of the circumferential ring portion (15).
EP16706855.0A 2015-02-26 2016-02-26 Piston for an internal combustion engine Withdrawn EP3262289A1 (en)

Applications Claiming Priority (2)

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DE102015002322.5A DE102015002322A1 (en) 2015-02-26 2015-02-26 Piston for an internal combustion engine
PCT/EP2016/054104 WO2016135301A1 (en) 2015-02-26 2016-02-26 Piston for an internal combustion engine

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EP3262289A1 true EP3262289A1 (en) 2018-01-03

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US (1) US20180038265A1 (en)
EP (1) EP3262289A1 (en)
JP (1) JP2018507977A (en)
DE (1) DE102015002322A1 (en)
WO (1) WO2016135301A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102018100336A1 (en) * 2018-01-09 2019-07-11 Man Truck & Bus Ag Piston for an internal combustion engine
US20190264633A1 (en) * 2018-02-28 2019-08-29 Tenneco Inc. Dual gallery two stroke piston
CN111502856A (en) * 2020-04-30 2020-08-07 上海建桥学院 Diesel engine piston head and numerical control machining process thereof
CN114251152B (en) * 2020-09-22 2022-12-20 马勒汽车技术（中国）有限公司 Lubrication mechanism for pin joint pair of internal combustion engine

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FR2238372A5 (en) * 1973-07-19 1975-02-14 Dampers
DE3403624A1 (en) * 1984-02-02 1985-08-08 Kolbenschmidt AG, 7107 Neckarsulm BUILT LIQUID-COOLED PISTON FOR INTERNAL COMBUSTION ENGINES
JPH0942052A (en) * 1995-08-02 1997-02-10 Komatsu Ltd Skirt lubricating piston
FI106396B (en) * 1998-11-19 2001-01-31 Wecometal Oy Internal combustion piston
WO2003098003A1 (en) * 2002-05-15 2003-11-27 Deltahawk, Inc. A lubricant-cooled and wristpin lubricating piston
DE10244511A1 (en) * 2002-09-25 2004-04-15 Mahle Gmbh Multi-part cooled piston for an internal combustion engine
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DE102004057558A1 (en) * 2004-11-30 2006-06-01 Mahle International Gmbh Piston for internal combustion engine has base component consisting of forged aluminum and ring element of ni-resist, with closed annular cooling passage located between base component and ring element
DE102006013884A1 (en) * 2006-03-25 2007-09-27 Mahle International Gmbh Internal combustion engine`s piston, has head with piston base exposed to focal ray and skirt, and circular partition wall arranged in cooling channel formed by skirt and arranged parallel to head, where wall has nozzle-like openings
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DE102012017217A1 (en) * 2012-08-31 2014-05-15 Mahle International Gmbh Piston for an internal combustion engine

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DE102015002322A1 (en) 2016-09-01
US20180038265A1 (en) 2018-02-08
WO2016135301A1 (en) 2016-09-01
JP2018507977A (en) 2018-03-22

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