EP2196657B1 - Piston for a combustion engine - Google Patents

Piston for a combustion engine Download PDF

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Publication number
EP2196657B1
EP2196657B1 EP09014204.3A EP09014204A EP2196657B1 EP 2196657 B1 EP2196657 B1 EP 2196657B1 EP 09014204 A EP09014204 A EP 09014204A EP 2196657 B1 EP2196657 B1 EP 2196657B1
Authority
EP
European Patent Office
Prior art keywords
piston
cover plates
cooling duct
annular wall
openings
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
EP09014204.3A
Other languages
German (de)
French (fr)
Other versions
EP2196657A1 (en
Inventor
Sascha-Oliver Boczek
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
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 EP2196657A1 publication Critical patent/EP2196657A1/en
Application granted granted Critical
Publication of EP2196657B1 publication Critical patent/EP2196657B1/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

Definitions

  • the invention relates to a piston for an internal combustion engine according to the preamble of claim 1.
  • all openings located on the underside of the cooling channel are closed in a simple and fast manner with two semicircular cover plates.
  • Fig. 1 shows a piston 1 for an internal combustion engine in section along the line I in Fig. 2 , which is made of steel and manufactured by casting. But the piston 1 can also be made of a light metal such as aluminum or magnesium. It has a piston head 2 with a centrally disposed combustion bowl 3 and with a radially outwardly formed on the piston head 2 annular wall 4, in the radially outer ring part 5 is formed for receiving in the figures, not shown piston rings.
  • the piston head 2, the combustion bowl 3 and the annular wall 4 define a circumferential cooling channel 6. Furthermore, the piston 1 on the piston bottom facing away from the bottom two pin bosses 7 and 8 with recessed in the direction of the piston axis 15 relative to the annular wall 4 end faces 23, 24, the one downwardly open cavity 16 radially outwardly limit, whose upper boundary is formed by the part of the piston crown 2, which also limits the combustion bowl 3.
  • the pin hubs 7 and 8 are over in Fig. 1 not shown connecting walls of two opposite shaft elements connected to each other, of which in FIG. 1 because of the position of the cutting plane, the shaft member 9 is shown.
  • FIG. 2 shown bottom view of the piston 1 can be seen the shaft members 9 and 10, which are connected via the recessed in the direction of the piston axis 15 connecting walls 11, 12, 13 and 14 with the pin bosses 7 and 8.
  • Fig. 3 shows that the shaft elements 9, 10 are connected exclusively via the connecting walls 12, 14 with the pin bosses 8 and have no direct connection to the annular wall 4, for example via a shank connection. Consequently, the piston 1 has recesses 17 and 18 between the shaft elements 9 and 10 and the annular wall 4.
  • the cooling channel 6 is bounded on its underside by ribs 19, which, as in Fig. 1 dashed lines is shown and Fig. 2 clearly shows, lie between kidney-shaped openings 20, wherein the ribs 19 and the openings 20 are distributed uniformly over the circumference.
  • a piston with a downwardly open Cooling channel increase the ribs 19, the strength of the piston crown 2 and prevent deformation of the piston crown 2 in engine operation due to the pressure of the combustion gases.
  • a lost core for example a sand core, is used to form the cooling channel 6, which can be very easily removed from the cooling channel 6 via the openings 20 after completion of the casting process, ie can be washed out in the case of a sand core.
  • the cooling channel 6 is closed by means of two semicircular cover plates 21 and 22, which are welded thereto for this purpose on the underside of the cooling channel 6. (This shows Fig. 2 the underside of the cooling channel 6 without cover plates.) It is also possible to fasten the cover plates 21 and 22 by means of screws on the underside of the cooling channel 6.
  • Fig. 1 is dashed lines that the cover plates 21 and 22 originally have a conical shape, before being placed on the mounting of the bottom of the ribs 19 and deformed under tension to the extent that they are in the Fig. 1 and 3 take on a flat plane. This results in the cover plates 21, 22, a bias that prevents fluttering of the cover plates in engine operation in the rapid reciprocation of the piston 1.
  • cover plates 21, 22 in the figures are shown on ⁇ lzulauf- and oil drain holes.
  • These openings can also be located in the joints of the cover plates, wherein opposing joints each have a semi-circular recess, which face each other so that they form a circular opening.

Description

Die Erfindung betrifft einen Kolben für einen Verbrennungsmotor nach dem Oberbegriff des Anspruches 1.The invention relates to a piston for an internal combustion engine according to the preamble of claim 1.

Aus der Offenlegungsschrift DE 10 2006 053 179 A1 ist ein Stahlkolben für einen Verbrennungsmotor bekannt, der einen Kühlkanal mit zwei oder mehr verschließbaren und auf dessen Unterseite angeordneten Öffnungen aufweist. Für jede einzelne Öffnung ist hierzu ein separates Verschlussteil vorgesehen, das in die jeweilige Öffnung formschlüssig eingesetzt wird. Nachteilig ist hierbei der Aufwand, der damit verbunden ist, dass zum einen eine Vielzahl von Verschlusselementen erforderlich ist, um eine größere Anzahl von Öffnungen zu verschließen, und dass zum anderen die Form der Verschlusselemente genau der Form der Öffnungen angepasst sein muss, um die Öffnungen hermetisch zu verschließen.From the publication DE 10 2006 053 179 A1 a steel piston for an internal combustion engine is known, which has a cooling channel with two or more closable and arranged on the underside of the openings. For each individual opening, a separate closure part is provided for this purpose, which is inserted in a form-fitting manner into the respective opening. The disadvantage here is the expense associated with the fact that on the one hand a plurality of closure elements is required to close a larger number of openings, and on the other hand that the shape of the closure elements must be exactly adapted to the shape of the openings to the openings hermetically seal.

Diese Nachteile des genannten Standes der Technik zu vermeiden, ist Aufgabe der Erfindung. Gelöst wird diese Aufgabe mit den im Kennzeichen des Hauptanspruches stehenden Merkmalen.To avoid these disadvantages of the cited prior art is the object of the invention. This problem is solved with the features in the characterizing part of the main claim.

Erfindungsgemäß werden hierbei auf einfache und schnelle Weise alle auf der Unterseite des Kühlkanals befindlichen Öffnungen mit zwei halbkreisförmigen Abdeckblechen verschlossen.According to the invention, all openings located on the underside of the cooling channel are closed in a simple and fast manner with two semicircular cover plates.

Zweckmäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.

Ein Ausführungsbeispiel der Erfindung wird im Folgenden anhand der Zeichnungen beschrieben. Es zeigen

Fig. 1
einen Schnitt durch einen Kolben entlang der Linie I in Fig. 2,
Fig. 2
eine Unteransicht des Kolbens gemäß Fig. 1 und
Fig. 3
einen Schnitt durch den Kolben entlang der Linie III in Fig. 1.
An embodiment of the invention will be described below with reference to the drawings. Show it
Fig. 1
a section through a piston along the line I in Fig. 2 .
Fig. 2
a bottom view of the piston according to Fig. 1 and
Fig. 3
a section through the piston along the line III in Fig. 1 ,

Fig. 1 zeigt einen Kolben 1 für einen Verbrennungsmotor im Schnitt entlang der Linie I in Fig. 2, der aus Stahl besteht und im Gießverfahren hergestellt ist. Der Kolben 1 kann aber auch aus einem Leichtmetall wie beispielsweise aus Aluminium oder aus Magnesium hergestellt sein. Er weist einen Kolbenboden 2 mit einer mittig angeordneten Verbrennungsmulde 3 und mit einer radial außen an den Kolbenboden 2 angeformte Ringwand 4 auf, in die radial außen eine Ringpartie 5 zur Aufnahme in den Figuren nicht dargestellter Kolbenringe eingeformt ist. Fig. 1 shows a piston 1 for an internal combustion engine in section along the line I in Fig. 2 , which is made of steel and manufactured by casting. But the piston 1 can also be made of a light metal such as aluminum or magnesium. It has a piston head 2 with a centrally disposed combustion bowl 3 and with a radially outwardly formed on the piston head 2 annular wall 4, in the radially outer ring part 5 is formed for receiving in the figures, not shown piston rings.

Der Kolbenboden 2, die Verbrennungsmulde 3 und die Ringwand 4 begrenzen einen umlaufenden Kühlkanal 6. Weiterhin weist der Kolben 1 auf der kolbenbodenabgewandten Unterseite zwei Bolzennaben 7 und 8 mit in Richtung der Kolbenachse 15 gegenüber der Ringwand 4 zurückgesetzten Stirnflächen 23, 24 auf, die einen nach unten offenen Hohlraum 16 radial außen begrenzen, dessen obere Begrenzung von dem Teil des Kolbenbodens 2 gebildet wird, der auch die Verbrennungsmulde 3 begrenzt. Die Bolzennaben 7 und 8 werden über in Fig. 1 nicht dargestellte Verbindungswände von zwei einander gegenüberliegenden Schaftelementen miteinander verbunden, von denen in Figur 1 wegen der Lage der Schnittebene das Schaftelement 9 dargestellt ist.The piston head 2, the combustion bowl 3 and the annular wall 4 define a circumferential cooling channel 6. Furthermore, the piston 1 on the piston bottom facing away from the bottom two pin bosses 7 and 8 with recessed in the direction of the piston axis 15 relative to the annular wall 4 end faces 23, 24, the one downwardly open cavity 16 radially outwardly limit, whose upper boundary is formed by the part of the piston crown 2, which also limits the combustion bowl 3. The pin hubs 7 and 8 are over in Fig. 1 not shown connecting walls of two opposite shaft elements connected to each other, of which in FIG. 1 because of the position of the cutting plane, the shaft member 9 is shown.

Die in Fig. 2 dargestellte Unteransicht des Kolbens 1 lässt die Schaftelemente 9 und 10 erkennen, die über die in Richtung der Kolbenachse 15 zurückgesetzten Verbindungswände 11, 12, 13 und 14 mit den Bolzennaben 7 und 8 verbunden sind.In the Fig. 2 shown bottom view of the piston 1 can be seen the shaft members 9 and 10, which are connected via the recessed in the direction of the piston axis 15 connecting walls 11, 12, 13 and 14 with the pin bosses 7 and 8.

Fig. 3 zeigt, dass die Schaftelemente 9, 10 ausschließlich über die Verbindungswände 12, 14 mit den Bolzennaben 8 verbunden sind und keine direkte Verbindung mit der Ringwand 4 beispielsweise über eine Schaftanbindung aufweisen. Demzufolge weist der Kolben 1 zwischen den Schaftelementen 9 und 10 und der Ringwand 4 Ausnehmungen 17 und 18 auf. Fig. 3 shows that the shaft elements 9, 10 are connected exclusively via the connecting walls 12, 14 with the pin bosses 8 and have no direct connection to the annular wall 4, for example via a shank connection. Consequently, the piston 1 has recesses 17 and 18 between the shaft elements 9 and 10 and the annular wall 4.

Der Kühlkanal 6 ist auf seiner Unterseite von Rippen 19 begrenzt, die, wie in Fig. 1 gestrichelt eingezeichnet ist und Fig. 2 deutlich zeigt, zwischen nierenförmigen Öffnungen 20 liegen, wobei die Rippen 19 und die Öffnungen 20 gleichmäßig über den Umfang verteilt sind. Gegenüber einem Kolben mit einem nach unten offenen Kühlkanal erhöhen die Rippen 19 die Festigkeit des Kolbenbodens 2 und verhindern eine Verformung des Kolbenbodens 2 im Motorbetrieb auf Grund des Druckes der Verbrennungsgase. Bei der Herstellung des Kolbens 1 wird zur Ausformung des Kühlkanals 6 ein verlorener Kern, beispielsweise ein Sandkern, verwendet, der nach Beendigung des Gießvorganges sehr leicht über die Öffnungen 20 aus dem Kühlkanal 6 entfernt, d.h., im Falle eines Sandkerns ausgewaschen werden kann.The cooling channel 6 is bounded on its underside by ribs 19, which, as in Fig. 1 dashed lines is shown and Fig. 2 clearly shows, lie between kidney-shaped openings 20, wherein the ribs 19 and the openings 20 are distributed uniformly over the circumference. Opposite a piston with a downwardly open Cooling channel increase the ribs 19, the strength of the piston crown 2 and prevent deformation of the piston crown 2 in engine operation due to the pressure of the combustion gases. In the production of the piston 1, a lost core, for example a sand core, is used to form the cooling channel 6, which can be very easily removed from the cooling channel 6 via the openings 20 after completion of the casting process, ie can be washed out in the case of a sand core.

Wie die Figuren 1 und 3 zeigen, wird der Kühlkanal 6 mittels zweier halbkreisförmiger Abdeckbleche 21 und 22 verschlossen, die hierzu an die Unterseite des Kühlkanals 6 angeschweißt werden. (Hierbei zeigt Fig. 2 die Unterseite des Kühlkanals 6 ohne Abdeckbleche.) Es ist auch möglich, die Abdeckbleche 21 und 22 mittels Schrauben an der Unterseite des Kühlkanals 6 zu befestigen. In Fig. 1 ist gestrichelt eingezeichnet, dass die Abdeckbleche 21 und 22 ursprünglich eine konische Form haben, bevor sie bei der Montage von unten auf die Rippen 19 aufgelegt und unter Spannung insoweit verformt werden, bis sie die in den Fig. 1 und 3 eingezeichnete ebene Form annehmen. Hierdurch ergibt sich in den Abdeckblechen 21, 22 eine Vorspannung, die im Motorbetrieb bei den schnellen Hin- und Herbewegungen des Kolbens 1 ein Flattern der Abdeckbleche verhindert. Zum Ein- und Ausleiten von Kühlöl weisen die Abdeckbleche 21, 22 in den Figuren nicht dargestellte Ölzulauf- und Ölablauföffnungen auf. Diese Öffnungen können sich auch in den Stoßstellen der Abdeckbleche befinden, wobei einander gegenüberliegende Stoßstellen je eine halbkreisförmige Ausnehmung aufweisen, die so einander gegenüberliegen, dass sie eine kreisförmige Öffnung bilden.As the FIGS. 1 and 3 show, the cooling channel 6 is closed by means of two semicircular cover plates 21 and 22, which are welded thereto for this purpose on the underside of the cooling channel 6. (This shows Fig. 2 the underside of the cooling channel 6 without cover plates.) It is also possible to fasten the cover plates 21 and 22 by means of screws on the underside of the cooling channel 6. In Fig. 1 is dashed lines that the cover plates 21 and 22 originally have a conical shape, before being placed on the mounting of the bottom of the ribs 19 and deformed under tension to the extent that they are in the Fig. 1 and 3 take on a flat plane. This results in the cover plates 21, 22, a bias that prevents fluttering of the cover plates in engine operation in the rapid reciprocation of the piston 1. For introducing and discharging cooling oil, the cover plates 21, 22 in the figures, not shown on Ölzulauf- and oil drain holes. These openings can also be located in the joints of the cover plates, wherein opposing joints each have a semi-circular recess, which face each other so that they form a circular opening.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Kolbenpiston
22
Kolbenbodenpiston crown
33
Verbrennungsmuldecombustion bowl
44
Ringwandring wall
55
Ringpartiering belt
66
Kühlkanalcooling channel
7,87.8
Bolzennabepin boss
9, 109, 10
Schaftelementshaft element
11,12,13,1411,12,13,14
Verbindungswandconnecting wall
1515
Kolbenachsepiston axis
1616
Hohlraumcavity
17, 1817, 18
Ausnehmungrecess
1919
Ripperib
2020
Öffnungopening
21,2221.22
AbdeckblechCover plate
23, 2423, 24
Stirnfläche der Bolzennabe 7, 8End face of the pin boss 7, 8

Claims (4)

  1. A piston (1) for an internal combustion engine
    - with a piston head (2),
    - with an annular wall (4) on the outside, in the radial direction, of the bottom of the piston head (2),
    - with two piston pin bosses (7, 8) on the bottom of the piston head (2), the two piston pin bosses (7, 8) having end faces (23, 24) that are set back, in the direction of the piston axis (15), with respect to the annular wall (4),
    - with two skirt elements (9, 10) that are opposite one another and connected with the piston pin bosses (7, 8), the skirt elements (9, 10) and the annular wall (4) having peripheral recesses (17, 18) located between them in the area of the skirt elements (9, 10), and with a cooling duct (6) that is close to the piston head (2) and arranged toward the outside in the radial direction, and that is bordered on the outside in the radial direction by the annular wall (4) and on the bottom by ribs (19) that are uniformly distributed over the perimeter and that have openings (20) lying between them,
    characterised in that all openings (20) of the cooling duct (6) are closed with two semicircular cover plates (21, 22) that are fastened to its bottom, the cover plates (21, 22) having at least one oil supply opening and at least one oil drain opening in and/or between them.
  2. A piston (1) according to claim 1, characterized in that the cover plates (21, 22) are welded on to the bottom of the cooling duct (6).
  3. A piston (1) according to claim 1, characterized In that the cover plates (21, 22) are screwed on to the bottom of the cooling duct (6).
  4. A piston (1) according to any one of claims 1 through 3, characterized in that the cover plates (21, 22), which have a conical shape in the unstressed state, are, when fastened to the bottom of the cooling duct (6), mechanically prestressed and have a planar shape.
EP09014204.3A 2008-12-13 2009-11-13 Piston for a combustion engine Not-in-force EP2196657B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008062219A DE102008062219A1 (en) 2008-12-13 2008-12-13 Piston for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP2196657A1 EP2196657A1 (en) 2010-06-16
EP2196657B1 true EP2196657B1 (en) 2017-05-31

Family

ID=41564009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09014204.3A Not-in-force EP2196657B1 (en) 2008-12-13 2009-11-13 Piston for a combustion engine

Country Status (3)

Country Link
US (1) US20100147250A1 (en)
EP (1) EP2196657B1 (en)
DE (1) DE102008062219A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8863647B2 (en) * 2011-05-04 2014-10-21 GM Global Technology Operations LLC Oil gallery piston with improved thermal conductivity
DE102011116332A1 (en) * 2011-07-05 2013-01-10 Mahle International Gmbh Piston for an internal combustion engine
US20130025561A1 (en) * 2011-07-28 2013-01-31 Dieter Gabriel Bowl rim and root protection for aluminum pistons
EP2623760B1 (en) 2012-01-27 2017-08-02 BRP-Rotax GmbH & Co. KG Piston for an internal combustion engine
DE102012203570A1 (en) * 2012-03-07 2013-09-12 Mahle International Gmbh Cast light metal piston, especially an aluminum piston
DE102012215541A1 (en) * 2012-08-31 2014-03-06 Mahle International Gmbh piston
JP2015532381A (en) * 2012-10-08 2015-11-09 コンポーネンタ フィンランド オサケ ユキチュア Piston of internal combustion engine
DE102014210875A1 (en) * 2014-06-06 2015-12-17 Federal-Mogul Nürnberg GmbH Piston and process for its production
JP2018505341A (en) 2015-01-30 2018-02-22 フェデラル−モーグル・リミテッド・ライアビリティ・カンパニーＦｅｄｅｒａｌ−Ｍｏｇｕｌ Ｌｌｃ Piston with sealed cooling gallery and method of construction

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4428330A (en) * 1982-09-08 1984-01-31 Kabushiki Kaisha Komatsu Seisakusho Piston for internal combustion engines
DE3643039A1 (en) * 1986-12-17 1988-06-30 Mahle Gmbh COOLABLE SUBMERSIBLE PISTON FOR COMBUSTION ENGINES
US4986167A (en) * 1989-05-25 1991-01-22 Caterpillar Inc. Articulated piston with a cooling recess having a preestablished volume therein
BR9005376A (en) * 1990-10-18 1992-06-16 Metal Leve Sa BIPARTITE EMBULE WITH POSTIC GALLERY CLOSING AND PROCESS FOR YOUR OBTAINING
DE4208037C2 (en) * 1992-03-13 1998-03-26 Mahle Gmbh Multi-part, cooled piston for internal combustion engines
DE4446726A1 (en) * 1994-12-24 1996-06-27 Mahle Gmbh Process for producing a one-piece cooling channel piston
GB2365507B (en) * 2000-08-02 2004-09-15 Federal Mogul Technology Ltd Engine piston and manufacture
DE10110889C1 (en) * 2001-03-07 2002-10-02 Ks Kolbenschmidt Gmbh Method for producing a cooling channel piston, and a cooling channel piston produced by the method
US6990890B2 (en) * 2002-11-06 2006-01-31 Federal-Mogul World Wide, Inc. Monobloc piston having open floor
DE10301367A1 (en) * 2003-01-16 2004-07-29 Mahle Gmbh Method for making shaker bores in the cooling channel of a one-piece piston
DE10358121A1 (en) * 2003-04-28 2004-11-25 Ks Kolbenschmidt Gmbh Piston for internal combustion engine, has cooling duct partially formed by stamped metal sheet, in which radial side of stamp used has sawtooth design
DE10326456A1 (en) * 2003-06-12 2004-12-30 Mahle Gmbh Pistons for an internal combustion engine
US6892690B2 (en) * 2003-10-06 2005-05-17 Mahle Gmbh Cooling channel cover for a one-piece piston of an internal combustion engine
US7406941B2 (en) * 2004-07-21 2008-08-05 Federal - Mogul World Wide, Inc. One piece cast steel monobloc piston
DE102004038946A1 (en) * 2004-08-11 2006-02-23 Mahle International Gmbh Cooling channel piston for an internal combustion engine with heat pipes
DE102004057624A1 (en) * 2004-11-30 2006-06-01 Mahle International Gmbh Piston for internal combustion engine, has cooling duct which is closed by cooling duct cover that is provided with tongue in radial inner zone, where tongue engages into recess that is molded into bottom part of piston
DE102006053179A1 (en) 2005-11-10 2007-05-16 Ks Kolbenschmidt Gmbh Method for manufacturing one-piece steel piston of internal combustion engine for private cars uses fine casting with casting mould and lost core shaped to form closable openings in coolant channel once they are removed
DE102007027162A1 (en) * 2007-06-13 2008-12-18 Mahle International Gmbh Two-piece piston for an internal combustion engine

Also Published As

Publication number Publication date
US20100147250A1 (en) 2010-06-17
DE102008062219A1 (en) 2010-06-17
EP2196657A1 (en) 2010-06-16

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