EP1984613A1 - Multiple-part steel piston for an internal combustion engine having a cooling duct - Google Patents

Multiple-part steel piston for an internal combustion engine having a cooling duct

Info

Publication number
EP1984613A1
EP1984613A1 EP07703220A EP07703220A EP1984613A1 EP 1984613 A1 EP1984613 A1 EP 1984613A1 EP 07703220 A EP07703220 A EP 07703220A EP 07703220 A EP07703220 A EP 07703220A EP 1984613 A1 EP1984613 A1 EP 1984613A1
Authority
EP
European Patent Office
Prior art keywords
piston
ring element
ring
web
designed
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
EP07703220A
Other languages
German (de)
French (fr)
Other versions
EP1984613B1 (en
Inventor
Andreas Rehl
Rainer Freeser
Emmerich Ottliczky
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.)
KS Kolbenschmidt GmbH
Original Assignee
KS Kolbenschmidt 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 KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Priority to PL07703220T priority Critical patent/PL1984613T3/en
Publication of EP1984613A1 publication Critical patent/EP1984613A1/en
Application granted granted Critical
Publication of EP1984613B1 publication Critical patent/EP1984613B1/en
Active 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 
    • F02F3/0015—Multi-part pistons
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • 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 with a cooling channel according to the features of the preamble of claim 1.
  • Pistons with a cooling channel for internal combustion engines are known in principle.
  • cooling channel piston said piston is provided behind the ring field coaxially and radially circumferentially, a cooling passage, circulated by the engine oil for cooling the upper portion of the piston.
  • DE 103 25 914 A1 or DE 100 47 258 C2 has already become known to attach a ring element to a piston body.
  • the contact areas of the ring element are designed at least once paragraph-shaped to the piston body and the ring element is permanently attached to the piston body.
  • the paragraph-shaped design of the contact areas has the advantage that the ring element is guided both during placement and after attachment to the piston body and is guided guided, so that tilting can be avoided.
  • the heel-shaped abutment areas also increase the strength of the piston crown and the upper piston part, after the ring element has been permanently attached to the piston body. Through this both form-fitting and material-locking connection easier assembly and increased strength is given.
  • Another advantage of the invention lies in the fact that the wall thicknesses of the components involved, in particular of the ring member and the piston body (in particular the wall thickness in the transition region from the cooling channel to a combustion bowl) over the prior art can be reduced because of the placement of the ring element on the piston body only small forces are required, which are significantly lower than those forces that would be required, as if the ring member to be bolted to the piston body.
  • by appropriate shaping of both the Kobengrund stresses and the ring element can be realized in advance the desired and sufficiently large cross-section of the cooling channel.
  • a piston 1 which consists of a piston upper part 2 and a piston lower part 3.
  • the finished piston 1 may be in one piece or consist of the initially separate parts 2, 3, which are joined together.
  • the invention is also applied to a piston head of a pendulum piston.
  • piston upper part 2 a ring field with a plurality of annular grooves 4 and a radially surrounding cooling channel 5 arranged behind it is provided in a manner known per se. Not necessarily also a combustion chamber trough 6 is arranged behind the cooling channel 5. Depending on the design of the piston 1, such a combustion bowl 6 is present or not. In addition or as an alternative to a combustion bowl 6, one or more valve pockets may also be present.
  • the piston lower part 3 has, in a manner also known per se, at least one piston shaft 7, in particular a cylinder-shaped piston skirt, and a pin bore 8 for receiving a piston pin.
  • the lower web 11 on which the lower peripheral edge of the ring element 9 rests, designed paragraph-shaped.
  • the lower web 11 protrudes almost horizontally from the piston main body, on the one hand to pretend the position of the ring member 9 on the piston body and on the other hand the height to reduce the piston, since in this embodiment, the piston skirt and the piston hub can go out almost perpendicular and at right angles from the lower web 11.
  • a piston which can be used for the operation of high-speed, high-pressure diesel engines with outputs greater than 80 kW per liter and ignition pressures above 200 bar.

Abstract

The invention relates to a piston (1) which comprises a piston upper part (2) and a piston lower part (3), wherein there are an annular field which is formed by an annular element (9) and has annular grooves (4), a cooling duct (5) which runs behind the latter coaxially and radially and, in particular, a combustion-chamber recess (6) in the region of the piston upper part (2), and the piston lower part (3) has at least one piston skirt (7) and a corresponding pin hole (8), wherein there is provision according to the invention for the contact regions of the annular element (9) on the piston basic body to be designed with at least one shoulder shape and for the annular element (9) to be joined to the piston basic body non-releasably.

Description

Seite 1 page 1
Mehrteiliger Stahlkolben für einen Verbrennungsmotor mit einem KühlkanalMulti-part steel piston for an internal combustion engine with a cooling channel
Beschreibungdescription
Die Erfindung betrifft einen Kolben für einen Verbrennungsmotor mit einem Kühlkanal gemäß den Merkmalen des Oberbegriffes des Patentanspruches 1.The invention relates to a piston for an internal combustion engine with a cooling channel according to the features of the preamble of claim 1.
Kolben mit einem Kühlkanal für Verbrennungsmotore sind grundsätzlich bekannt. Bei solchen, auch Kühlkanalkolben genannten Kolben ist hinter dem Ringfeld koaxial und radial umlaufend, ein Kühlkanal vorgesehen, durch den Motoröl zur Kühlung des oberen Bereiches des Kolbens zirkuliert.Pistons with a cooling channel for internal combustion engines are known in principle. In such, also cooling channel piston said piston is provided behind the ring field coaxially and radially circumferentially, a cooling passage, circulated by the engine oil for cooling the upper portion of the piston.
Es ist bekannt, solche Kühlkanäle durch einen verlorenen Kern herzustellen.It is known to produce such cooling channels through a lost core.
Außerdem ist es bekannt, einen zugänglichen Bereich des Kolbenbodens mit einer umlaufenden Vertiefung zu versehen, die anschließend mit einem Verschlusselement, wie z.B. einem Blechstreifen, verschlossen wird.Moreover, it is known to provide an accessible area of the piston crown with a circumferential recess, which is then connected to a closure element, such as a cap. a metal strip, is closed.
Die erstgenannte Konstruktion hat sich in der Praxis zwar bewährt, aber den Nachteil, dass ein vollständiges Entfernen des verlorenen Kerns erforderlich ist, um das Eindringen von Fremdkörpern, die den verlorenen Kern gebildet haben, in den Motoröl-Kreislauf des Verbrennungsmotors zu vermeiden. Die zweitgenannte Methode hat den Nachteil, dass hierdurch recht hoch bauende Kolben entstehen, da die radial umlaufende Vertiefung mit einem entsprechenden Werkzeug von unten eingebracht werden muss. Seite 2The former design has been proven in practice, but the disadvantage that a complete removal of the lost core is required to prevent the ingress of foreign bodies, which have formed the lost core in the engine oil circuit of the internal combustion engine. The second-mentioned method has the disadvantage that in this way quite high-build piston arise because the radially encircling depression must be introduced with a corresponding tool from below. Page 2
Um diese beschriebenen Nachteile zu vermeiden, ist aus der DE 103 25 914 A1 oder der DE 100 47 258 C2 schon bekannt geworden, an einem Kolbengrundkörper ein Ringelement anzufügen.To avoid these disadvantages described, DE 103 25 914 A1 or DE 100 47 258 C2 has already become known to attach a ring element to a piston body.
Bei der DE 103 25 914 A1 ist vorgesehen, dass das Ringelement mittels einer Schraubverbindung an dem Kolbengrundkörper befestigt wird. Dies hat aber den Nachteil, dass sowohl der Kolbengrundkörper als auch das Ringelement nach ihrer jeweiligen getrennten Herstellung aufwändig bearbeitet werden müssen, da am Kolbengrundkörper ein Außengewinde und korrespondierend dazu am Ringelement ein Innengewinde geschnitten werden müssen. Da im Stand der Technik der Kolbengrundkörper aus geschmiedetem Stahl besteht, kann dessen Außengewinde nicht mit Herstellung des Kolbengrundkörpers eingebracht werden, sondern dies muss nachträglich erfolgen. Da geschmiedeter Stahl aber die für Verbrennungsmotoren erforderliche Festigkeit und Zähigkeit aufweist, ist dies ein umständlicher und lang andauernder Prozess, der die Herstellungskosten eines solchen Kolbens in nachteiliger Weise erhöht. Außerdem kann es beim Aufschrauben des Ringelementes auf den Kolbengrundkörper sehr schnell zu Verkantungen kommen, so dass dadurch die Gefahr besteht, dass entweder der Kolbengrundkörper oder das Ringelement oder beide Bauteile nicht mehr brauchbar sind.In DE 103 25 914 A1 it is provided that the ring element is fastened by means of a screw connection to the piston main body. However, this has the disadvantage that both the piston base body and the ring element must be laboriously processed after their respective separate production, since an external thread and correspondingly on the ring element an internal thread must be cut on the piston body. Since in the prior art, the piston body consists of forged steel, its external thread can not be introduced with the production of the piston body, but this must be done later. However, since forged steel has the strength and toughness required for internal combustion engines, this is a cumbersome and long-lasting process that disadvantageously increases the manufacturing cost of such a piston. In addition, when the ring element is screwed onto the piston base body, tilting can occur very quickly, so that there is a risk that either the piston main body or the ring element or both components will no longer be usable.
Bei der DE 100 47 258 C2 liegt das Ringelement stumpf an dem Kolbengrundkörper an, so dass beim Aufsetzen keine Führung gegeben ist und nach dem Fügen die Steifigkeit nicht ausreichend hoch ist.In DE 100 47 258 C2, the ring element is butt against the piston body, so that no contact is made during placement and after joining the rigidity is not sufficiently high.
Der Erfindung liegt daher die Aufgabe zu Grunde, einen gattungsgemäßen Kolben dahingehend zu verbessern, dass die eingangs geschilderten Nachteile vermieden werden. Seite 3The invention is therefore based on the object to improve a generic piston to the effect that the initially described disadvantages are avoided. Page 3
Diese Aufgabe ist dadurch gelöst, dass die Anlagebereiche des Ringelementes an den Kolbengrundkörper zumindest einmal absatzförmig gestaltet sind und das Ringelement unlösbar an dem Kolbengrundkörper angefügt ist. Die absatzförmige Gestaltung der Anlagebereiche hat den Vorteil, dass das Ringelement sowohl beim Aufsetzen als auch nach dem Anbringen an dem Kolbengrundkörper geführt wird und geführt gelagert ist, so dass Verkantungen vermieden werden. Die absatzförmigen Anlagebereiche erhöhen darüber hinaus die Festigkeit des Kolbenbodens bzw. des Kolbenoberteils, nachdem das Ringelement unlösbar an dem Kolbengrundkörper angefügt worden ist. Durch diese sowohl formschlüssige als auch materialschlüssige Verbindung ist eine einfachere Montage und eine erhöhte Festigkeit gegeben. Ein weiterer Vorteil der Erfindung ist darin zu sehen, dass die Wandstärken der beteiligten Bauelemente, insbesondere des Ringelements und des Kolbengrundkörpers (insbesondere die Wandstärke im Übergangsbereich von dem Kühlkanal zu einer Brennraummulde) gegenüber dem Stand der Technik verringert werden können, da zum Aufsetzen des Ringelementes auf den Kolbengrundkörper nur geringe Kräfte erforderlich sind, die deutlich geringer ausfallen als diejenigen Kräfte, die erforderlich wären, als wenn das Ringelement auf dem Kolbengrundkörper festgeschraubt werden soll. Außerdem lässt sich durch entsprechende Formgebung sowohl des Kobengrundkörpers als auch des Ringelements schon vorab der gewünschte und ausreichend große Querschnitt des Kühlkanals realisieren. Mit dem erfindungsgemäßen Kolben werden also mehrere Vorteile erzielt, nämlich Festigkeitssteigerung, einfachere Herstellung und Montage, geringere Kolbenhöhe und auch eine Gewichtsersparnis auf Grund der geschilderten Verringerungen der Wandstärken.This object is achieved in that the contact areas of the ring element are designed at least once paragraph-shaped to the piston body and the ring element is permanently attached to the piston body. The paragraph-shaped design of the contact areas has the advantage that the ring element is guided both during placement and after attachment to the piston body and is guided guided, so that tilting can be avoided. The heel-shaped abutment areas also increase the strength of the piston crown and the upper piston part, after the ring element has been permanently attached to the piston body. Through this both form-fitting and material-locking connection easier assembly and increased strength is given. Another advantage of the invention lies in the fact that the wall thicknesses of the components involved, in particular of the ring member and the piston body (in particular the wall thickness in the transition region from the cooling channel to a combustion bowl) over the prior art can be reduced because of the placement of the ring element on the piston body only small forces are required, which are significantly lower than those forces that would be required, as if the ring member to be bolted to the piston body. In addition, by appropriate shaping of both the Kobengrundkörpers and the ring element can be realized in advance the desired and sufficiently large cross-section of the cooling channel. With the piston according to the invention thus several advantages are achieved, namely increase in strength, ease of manufacture and assembly, lower piston height and also a weight saving due to the described reductions in wall thicknesses.
Ein Ausführungsbeispiel der Erfindung, auf das diese jedoch nicht beschränkt ist, ist in den beiden Figuren 1 und 2 gezeigt und im Folgenden beschrieben: Seite 4An embodiment of the invention, to which, however, is not limited, is shown in the two figures 1 and 2 and described below: page 4
In diesen Figuren ist ein Kolben 1 gezeigt, der aus einem Kolbenoberteil 2 und einem Kolbenunterteil 3 besteht. Der fertige Kolben 1 kann einstückig sein oder aus den zunächst voneinander getrennten Teilen 2, 3 bestehen, die zusammengefügt werden. Außerdem ist es denkbar, dass die Erfindung auch bei einem Kolbenkopf eines Pendelschaftkolbens angewendet wird.In these figures, a piston 1 is shown, which consists of a piston upper part 2 and a piston lower part 3. The finished piston 1 may be in one piece or consist of the initially separate parts 2, 3, which are joined together. In addition, it is conceivable that the invention is also applied to a piston head of a pendulum piston.
Im Kolbenoberteil 2 ist in an sich bekannter Weise ein Ringfeld mit mehreren Ringnuten 4 und einem dahinter angeordneten radial umlaufenden Kühlkanal 5 vorhanden. Nicht zwingend ist ebenfalls hinter den Kühlkanal 5 eine Brennraummulde 6 angeordnet. Je nach Bauart des Kolbens 1 ist eine solche Brennraummulde 6 vorhanden oder nicht. Ergänzend oder alternativ zu einer Brennraummulde 6 können auch eine oder mehrere Ventiltaschen vorhanden sein. Das Kolbenunterteil 3 weist in ebenfalls an sich bekannter Weise zumindest einen Kolbenschaft 7, insbesondere einen zylinderförmig ausgestalten Kolbenschaft, sowie eine Bolzenbohrung 8 zur Aufnahme eines Kolbenbolzens auf.In piston upper part 2, a ring field with a plurality of annular grooves 4 and a radially surrounding cooling channel 5 arranged behind it is provided in a manner known per se. Not necessarily also a combustion chamber trough 6 is arranged behind the cooling channel 5. Depending on the design of the piston 1, such a combustion bowl 6 is present or not. In addition or as an alternative to a combustion bowl 6, one or more valve pockets may also be present. The piston lower part 3 has, in a manner also known per se, at least one piston shaft 7, in particular a cylinder-shaped piston skirt, and a pin bore 8 for receiving a piston pin.
Nach der Herstellung eines Kolbengrundkörpers weist dieser einen oberen Steg 10 und einen unteren Steg 11 auf, die beide radial umlaufend gestaltet sind, wobei in besonders vorteilhafter Weise der obere Steg 10 im Durchmesser kleiner ist als der untere Steg 11. Dadurch ist es möglich, dass ein Ringelement 9, das separat von dem Kolbengrundkörper hergestellt worden ist, von oben (bei Betrachtung der Figur 1) über das Kolbenoberteil 2 des Kolbengrundkörpers aufzusetzen. Hierbei ist es in erfindungsgemäßer Weise von Vorteil, dass die Anlagebereiche des Ringelementes 9 an dem Kolbengrundkörper im Bereich sowohl einer oberen Fügestelle 12 als auch im Bereich einer unteren Fügestelle 13 zumindest einmal absatzförmig gestaltet sind.After the preparation of a piston body this has an upper web 10 and a lower web 11, which are both designed to be radially encircling, wherein in a particularly advantageous manner, the upper web 10 is smaller in diameter than the lower web 11. This makes it possible that a ring member 9, which has been made separately from the piston body, from above (as viewed in Figure 1) on the piston upper part 2 of the piston body to set. It is advantageous in the inventive manner that the contact areas of the ring element 9 are designed at least once paragraph-shaped on the piston body in the region of both an upper joint 12 and in the region of a lower joint 13.
Außerdem ist es vorgesehen, dass der nach unten weisende umlaufende Rand des Ringelementes 9 mit einem Absatz auf den unteren Steg 11 aufliegt. Dadurch ist die endgültige Lage des Ringelementes 9 an dem Kolbengrundkörper vorgegeben. Seite 5In addition, it is provided that the downwardly facing peripheral edge of the ring element 9 rests with a shoulder on the lower web 11. As a result, the final position of the ring element 9 is predetermined on the piston body. page 5
Zur Erhöhung der Festigkeit nach dem Fügen des Ringelementes 9 an den Kolbengrundkörper und zur Verbesserung der Führung beim Aufsetzen des Ringelementes 9 an den Kolbengrundkörper ist der obere Steg 10 und der korrespondierende Bereich des Ringelementes 9 mit einem Absatz 14 versehen. Ebenso ist der untere Steg 11 , auf dem der untere umlaufende Rand des Ringelementes 9 aufliegt, absatzförmig gestaltet. Von besonderem Vorteil ist die Gestaltung dieses Absatzes als Feder-Nut-Bereich 15. Hierzu ist weiterhin vorgesehen, dass der untere Steg 11 nahezu waagerecht von dem Kolbengrundkörper absteht, um einerseits die Lage des Ringelementes 9 an dem Kolbengrundkörper vorgeben zu können und andererseits die Bauhöhe des Kolbens zu reduzieren, da bei dieser Ausgestaltung der Kolbenschaft bzw. die Kolbennaben nahezu senkrecht und im rechten Winkel von dem unteren Steg 11 ausgehen können.To increase the strength after joining the ring member 9 to the piston body and to improve the leadership when placing the ring member 9 to the piston body of the upper web 10 and the corresponding region of the ring member 9 is provided with a shoulder 14. Likewise, the lower web 11, on which the lower peripheral edge of the ring element 9 rests, designed paragraph-shaped. For this purpose, it is further provided that the lower web 11 protrudes almost horizontally from the piston main body, on the one hand to pretend the position of the ring member 9 on the piston body and on the other hand the height to reduce the piston, since in this embodiment, the piston skirt and the piston hub can go out almost perpendicular and at right angles from the lower web 11.
Nachdem das Ringelement 9 in der beschriebenen Art und Weise auf den Kolbengrundkörper aufgesetzt und durch Formschluss festgelegt worden ist, erfolgt ein Fügeprozess, in dem die obere und untere Fügestelle 12, 13 derart bearbeitet werden, dass das Ringelement 9 unlösbar mit dem Kolbengrundkörper verbunden wird. Hier kommt in besonders vorteilhafter Weise ein Schweißprozess oder ein Lötprozess in Frage. Auf Grund der dünnen zu verschweißenden Wandstärken im Bereich der Stege 10, 11 und zur Erzielung eines geringen Verzuges und kleiner Wärmeeinflusszonen bieten sich die Schweißprozesse Laserschweißen, Elektronikstrahlschweißen, Plasmaschweißen oder das WIG-Orbitalschweißen an. Werden hohe Kohlenstoffgehalte der zu verwendenden Stähle für Ringelement und Kolbengrundkörper verwendet, sollte ein Zusatzwerkstoff ausgewählt werden, der neben der erforderlichen Festigkeit auch eine ausreichende Zähigkeit und Verformbarkeit aufweist. Seite 6After the ring member 9 has been placed in the manner described on the piston body and fixed by positive engagement, a joining process in which the upper and lower joint 12, 13 are processed such that the ring member 9 is permanently connected to the piston body. Here comes in a particularly advantageous manner, a welding process or a soldering process in question. Due to the thin wall thicknesses to be welded in the region of the webs 10, 11 and to achieve a low distortion and small heat-affected zones, the welding processes laser welding, electronic beam welding, plasma welding or TIG orbital welding are suitable. If high carbon contents of the steels to be used are used for the ring element and the piston main body, an additional material should be selected which, in addition to the required strength, also has sufficient toughness and ductility. page 6
In besonders vorteilhafter Weise lässt sich mit der vorliegenden Erfindung ein Kolben realisieren, der für den Betrieb von schnell laufenden, hoch belasteten Dieselmotoren mit Leistungen größer als 80 kW pro Liter und Zünddrücken oberhalb 200 bar einsetzbar ist. In a particularly advantageous manner can be realized with the present invention, a piston which can be used for the operation of high-speed, high-pressure diesel engines with outputs greater than 80 kW per liter and ignition pressures above 200 bar.
Seite 7Page 7
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1. Kolben1st piston
2. Kolbenoberteil2nd piston upper part
3. Kolbenunterteil3rd piston lower part
4. Ringnut4. annular groove
5. Kühlkanal5. Cooling channel
6. Brennraummulde6. combustion bowl
7. Kolbenschaft7. Piston shaft
8. Bolzenbohrung8. Bolt hole
9. Ringelement9. ring element
10. oberer Steg10th upper bridge
11. unterer Steg11th lower jetty
12. obere Fügestelle12th upper joint
13. untere Fügestelle13th lower joint
14. Absatz14. Paragraph
15. Feder-Nut-Bereich15. tongue and groove area
16. Kolbenboden 16th piston bottom

Claims

Seite 8Mehrteiliger Stahlkolben für einen Verbrennungsmotor mit einem KühlkanalPatentansprüche Page 8Multi-piece steel piston for an internal combustion engine with a cooling channel patent claims
1. Kolben (1), der aus einem Kolbenoberteil (2) und einem Kolbenunterteil (3) besteht, wobei im Bereich des Kolbenoberteils (2) ein von einem Ringelement (9) gebildetes Ringfeld mit Ringnuten (4), ein dahinter koaxial und radial umlaufender Kühlkanal (5) und insbesondere eine Brennraummulde (6) vorhanden sind und das Kolbenunterteil (3) zumindest einen Kolbenschaft (7) und eine entsprechende Bolzenbohrung (8) aufweist, dadurch gekennzeichnet, dass die Anlagebereiche des Ringelementes (9) an dem Kolbengrundkörper zumindest einmal absatzförmig gestaltet sind und das Ringelement (9) unlösbar an dem Kolbengrundkörper angefügt ist.1. piston (1), which consists of a piston upper part (2) and a piston lower part (3), wherein in the region of the piston upper part (2) one of a ring element (9) formed ring field with annular grooves (4), behind a coaxial and radial Circumferential cooling channel (5) and in particular a combustion bowl (6) are present and the piston lower part (3) at least one piston skirt (7) and a corresponding pin bore (8), characterized in that the contact areas of the ring element (9) on the piston body at least once designed paragraph-shaped and the ring element (9) is permanently attached to the piston body.
2. Kolben (1) nach Anspruch 1 , dadurch gekennzeichnet, dass aus dem Kolbengrundkörper ein oberer Steg (10) und ein demgegenüber durchmessergrößerer unterer Steg (11) herausragt, die beide radial umlaufend gestaltet sind, wobei der nach unten weisende umlaufende Rand des Ringelementes (9) mit einem Absatz auf dem unteren Steg (11) aufliegt.2. Piston (1) according to claim 1, characterized in that from the piston main body an upper web (10) and a contrast larger diameter lower web (11) protrudes, both of which are designed to encircle radially, wherein the downwardly facing peripheral edge of the ring element (9) rests with a shoulder on the lower web (11).
3. Kolben (1) nach Anspruch 2, dadurch gekennzeichnet, dass der Absatz, mit dem der nach unten weisende umlaufende Rand des Ringelementes (9) auf dem unteren Steg (11) aufliegt, als Feder-Nut-Bereich ausgebildet ist.3. piston (1) according to claim 2, characterized in that the shoulder, with which the downwardly facing peripheral edge of the ring element (9) rests on the lower web (11), is designed as a tongue and groove area.
4. Kolben (1) nach Anspruch 1 , 2 oder3, dadurch gekennzeichnet, dass der untere Steg (11) nahezu waagerecht von dem Kolbengrundkörper absteht. Seite 94. piston (1) according to claim 1, 2 or3, characterized in that the lower web (11) projects almost horizontally from the piston body. Page 9
5. Kolben (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Ringelement (9) rotationssymetrisch ist und den gesammten Ringfeldbereich und den äußeren Rand des Kolbenbodens (16) bildet. 5. Piston (1) according to one of the preceding claims, characterized in that the ring element (9) is rotationally symmetrical and forms the entire ring field area and the outer edge of the piston head (16).
EP07703220.9A 2006-02-17 2007-02-02 Multiple-part steel piston for an internal combustion engine having a cooling duct Active EP1984613B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07703220T PL1984613T3 (en) 2006-02-17 2007-02-02 Multiple-part steel piston for an internal combustion engine having a cooling duct

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006007806 2006-02-17
PCT/EP2007/000891 WO2007093289A1 (en) 2006-02-17 2007-02-02 Multiple-part steel piston for an internal combustion engine having a cooling duct

Publications (2)

Publication Number Publication Date
EP1984613A1 true EP1984613A1 (en) 2008-10-29
EP1984613B1 EP1984613B1 (en) 2017-11-01

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Country Link
EP (1) EP1984613B1 (en)
DE (1) DE102007005268A1 (en)
PL (1) PL1984613T3 (en)
WO (1) WO2007093289A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102007044106A1 (en) * 2007-09-15 2009-03-19 Mahle International Gmbh Two-piece piston for an internal combustion engine
DE102008038325A1 (en) 2007-12-20 2009-06-25 Mahle International Gmbh Method for attaching a ring element on a piston for an internal combustion engine
DE102009025691A1 (en) 2009-06-20 2010-01-28 Daimler Ag Piston for internal combustion engine, particularly reciprocating internal combustion engine, has upper piston area, which has ring carrier with ring groove and piston bowl
DE102009041392A1 (en) 2009-09-12 2011-05-26 Daimler Ag Piston for internal combustion engine, particularly reciprocating piston engine, has upper piston area, which has ring carrier with ring groove and piston bowl
US8807109B2 (en) * 2009-11-06 2014-08-19 Federal-Mogul Corporation Steel piston with cooling gallery and method of construction thereof
US9970384B2 (en) 2009-11-06 2018-05-15 Federal-Mogul Llc Steel piston with cooling gallery and method of construction thereof
DE102010051033A1 (en) 2010-11-11 2012-05-16 Daimler Ag Liquid-cooled piston of an internal combustion engine
DE102010051681B4 (en) 2010-11-17 2019-09-12 Daimler Ag Method for producing a cooling channel piston
DE102010056218A1 (en) * 2010-12-24 2012-06-28 Mahle International Gmbh Piston for an internal combustion engine
DE102011013143A1 (en) 2011-03-04 2012-09-06 Mahle International Gmbh Piston for an internal combustion engine and method for its production
DE102011107656A1 (en) * 2011-07-12 2013-01-17 Mahle International Gmbh Method for producing a piston for an internal combustion engine and pistons for an internal combustion engine
US9593641B2 (en) * 2011-09-21 2017-03-14 Mahle International Gmbh Laser welded piston assembly
US20160061326A1 (en) * 2012-08-23 2016-03-03 Ks Kolbenschmidt Gmbh Joined connection on a two-piece steel piston and joining method
DE102012215300A1 (en) * 2012-08-29 2014-03-06 Federal-Mogul Nürnberg GmbH Steel/aluminum piston, used in motor, includes cooling channel and piston parts connected to along triangular weld seam produced by welding process, where seam is directed to cooling channel and cavity is formed by melting welding bead
DE102012220778A1 (en) * 2012-11-14 2014-05-15 Mahle International Gmbh Laser welding method for welding two elements e.g. plug and camshaft tube of motor component e.g. camshaft used in internal combustion engine, involves welding two elements of motor component with each other at adjustable welding depth
US9440310B2 (en) 2013-01-15 2016-09-13 Mahle International Gmbh Monolite piston laser welding spatter control
BR112015020267A2 (en) * 2013-02-22 2017-08-22 Mahle Int Gmbh PISTON ASSEMBLY WITH WELDING SUPPORT
DE102017109471A1 (en) 2016-05-04 2017-11-09 Ks Kolbenschmidt Gmbh piston
KR101874560B1 (en) * 2016-12-08 2018-07-04 동양피스톤 주식회사 Piston for vehicle engine and method for manufacturing the same
US10926362B2 (en) * 2018-12-13 2021-02-23 Caterpillar Inc. Remanufactured engine piston and method
DE102022102051A1 (en) 2022-01-28 2023-08-03 Ks Kolbenschmidt Gmbh Piston blank, piston and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3613521A (en) * 1968-11-07 1971-10-19 Komatsu Mfg Co Ltd Piston for internal combustion engine
BR8803970A (en) * 1988-07-15 1990-03-20 Metal Leve Sa REFRIGERATED ARTICULATED PUMP
IT1240526B (en) * 1990-07-31 1993-12-17 Borgo Nova S.P.A. IMPROVEMENT RELATING TO PISTONS, IN GENERAL.
DE19846152A1 (en) * 1998-10-07 2000-04-13 Mahle Gmbh Piston with piston base made of forged steel and a cooling channel
DE10128737B4 (en) * 2001-06-13 2005-08-18 Federal-Mogul Nürnberg GmbH Piston with dispersion-hardened piston upper part
US7104183B2 (en) * 2004-07-07 2006-09-12 Karl Schmidt Unisia, Inc. One-piece steel piston

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007093289A1 *

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DE102007005268A1 (en) 2007-08-30
EP1984613B1 (en) 2017-11-01
PL1984613T3 (en) 2018-04-30

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