EP2893177A1 - Piston for an internal combustion engine - Google Patents

Piston for an internal combustion engine

Info

Publication number
EP2893177A1
EP2893177A1 EP13765618.7A EP13765618A EP2893177A1 EP 2893177 A1 EP2893177 A1 EP 2893177A1 EP 13765618 A EP13765618 A EP 13765618A EP 2893177 A1 EP2893177 A1 EP 2893177A1
Authority
EP
European Patent Office
Prior art keywords
piston
base plate
closure element
collar
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.)
Granted
Application number
EP13765618.7A
Other languages
German (de)
French (fr)
Other versions
EP2893177B1 (en
Inventor
Timo Linke
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 EP2893177A1 publication Critical patent/EP2893177A1/en
Application granted granted Critical
Publication of EP2893177B1 publication Critical patent/EP2893177B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F02F3/225—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid the liquid being directed into blind holes
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • 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
    • F01P1/00—Air cooling
    • F01P1/04—Arrangements for cooling pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/18—Other cylinders
    • F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
    • 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
    • F02F2003/0053—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by soldering
    • 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
    • F02F2003/0061—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by welding
    • 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

Definitions

  • the present invention relates to a piston for an internal combustion engine, which has a piston skirt and a piston head with a circumferential annular portion and with a sealed with a closure element circumferential cooling channel, wherein between the piston head and the piston skirt, a circumferential recess is formed.
  • a generic piston is known, for example, from DE 44 46 726 A1 and is also referred to as a "piston with a thermally decoupled piston shaft.” Such pistons are characterized by high strength and high heat resistance due to the thermal decoupling of the piston head and piston shaft.
  • the object of the present invention is to develop a generic piston so that the cooling channel is closed in a particularly simple manner.
  • the solution consists in that the closure element consists of at least two sub-elements, that each sub-element has a radially oriented base plate and at least one circumferential collar axially aligned at the outer edge of the base plate, which is received in at least one outer fold extending below the ring portion.
  • the idea according to the invention consists of accurately fitting a closure element consisting of at least two partial elements into the outer fold arranged below the annular section.
  • the at least two sub-elements are structurally very simple and easy to manufacture. The need to set up a spring preload is eliminated.
  • the at least two sub-elements are fastened in the usual way on the piston. Since no disturbing voltages occur, the closure element designed according to the invention is securely and permanently held on the piston.
  • the at least one collar and / or the at least one base plate is expediently attached to the piston by welding, gluing or soldering.
  • the at least one collar is arranged flush with the outer contour of the piston head to ensure the fit accuracy in the cylinder in the mounted state.
  • Each sub-element expediently has exactly one continuous collar.
  • the sub-elements can also have two or more spaced-apart collars.
  • At least one oil inlet and / or oil outlet opening is provided in at least one base plate in order to ensure the cooling oil circulation in the cooling channel.
  • This at least one oil inlet and / or oil outlet opening is preferably formed in the end regions of two adjacent sub-elements. The necessary recesses in the end regions can be formed directly during the manufacturing process of the sub-elements.
  • the free edge of the at least one base plate is preferably arranged at a distance from the piston.
  • the free space between base plate and piston can then serve as an additional cooling outlet.
  • the closure element is expediently designed as a sheet metal component. It can also be designed as a spring plate. In this case, if desired, the free edge of at least one base plate may be biased against the piston.
  • Figure 1 shows an embodiment of a piston according to the invention in section, wherein the right half opposite the left half is shown rotated by 90 °;
  • Figure 2 is an enlarged perspective view of an embodiment of a closure element.
  • FIG. 1 shows an exemplary embodiment of a piston 10 according to the invention.
  • the piston 10 has a piston main body 11 and a piston ring element 12. Both components can be made of any metallic material that is suitable for joining the components.
  • the piston main body 11 and the piston ring element 12 together form the piston head 13 and the piston shaft 14 of the piston 10.
  • the piston base body 11 has the piston shaft 14, which is provided in known manner with hubs 15 and hub bores 16 for receiving a piston pin (not shown) and with running surfaces 17.
  • the piston main body 11 further forms an inner part 17a of a piston head 17 and a combustion recess 18th
  • the piston ring member 12 forms an outer portion 17b of the piston crown 17 and further includes a circumferential land land 19 and a circumferential ring portion 21 for receiving piston rings (not shown).
  • the hubs 15 of the piston main body 11 are attached via hub connections 22 on the underside of the piston head 13.
  • the piston skirt 14 is separated from the ring section 21 by a circumferential annular recess 23. Thus, the piston skirt 14 is thermally decoupled from the piston head 13.
  • the piston base body 11 and the piston ring element 12 are joined together by joining, in the exemplary embodiment preferably by means of laser welding.
  • a joining seam 26 is formed in the region of the piston head 17, which in this embodiment runs parallel to the central axis M of the piston 10.
  • the piston base body 11 and the piston ring element 12 together form a circumferential cooling channel 24, which is arranged between the combustion bowl 18 and the ring section 21 and is closed by a closure element 25.
  • the closure element 26 is designed in the embodiment as a sheet metal component and consists of two sub-elements 27, 28. Each sub-element has a radially oriented base plate 29 with a free edge 29a and exactly one axially aligned circumferential collar 31 which is disposed on the outer edge of the respective base plate 29. Recesses are provided in the end regions 27a, 27b, 28a, 28b of the subelements 27, 28, which together form an oil inlet or oil outlet opening 32, 33.
  • each circumferential collar 31 is received in an outer fold 34 which is formed in the piston ring member 11 below the ring portion 21.
  • Each collar 31 is formed flush with the outer contour of the piston ring member 11.
  • Each sub-element 27, 28 is secured in the region of its base plate 29 and / or in the region of its collar 31 by means of welding to the piston ring element 11.
  • the free edge 29 a of each base plate 29 is spaced from the piston 10.

Abstract

The present invention relates to a piston (10) for an internal combustion engine, the piston having a piston stem (14) and a piston head (13) with an encircling ring section (21) and with an encircling cooling duct (24) which is closed by a closure element (26), wherein an encircling recess (23) is formed between the piston head (13) and the piston stem (14). According to the invention, it is provided that the closure element (26) consists of at least two partial elements (27, 28), that each partial element (27, 28) has a radially aligned base plate (29) and at least one encircling collar (31) which is aligned axially on the outer edge (29a) of the base plate (29) and is accommodated in at least one outer fold (34) running below the ring section (21).

Description

Kolben für einen Verbrennungsmotor  Piston for an internal combustion engine
Die vorliegende Erfindung betrifft einen Kolben für einen Verbrennungsmotor, der einen Kolbenschaft sowie einen Kolbenkopf mit einer umlaufenden Ringpartie und mit einem mit einem Verschlusselement verschlossenen umlaufenden Kühlkanal aufweist, wobei zwischen dem Kolbenkopf und dem Kolbenschaft eine umlaufende Ausnehmung ausgebildet ist. The present invention relates to a piston for an internal combustion engine, which has a piston skirt and a piston head with a circumferential annular portion and with a sealed with a closure element circumferential cooling channel, wherein between the piston head and the piston skirt, a circumferential recess is formed.
Ein gattungsgemäßer Kolben ist bspw. aus der DE 44 46 726 A1 bekannt und wird auch als„Kolben mit thermisch entkoppeltem Kolbenschaft" bezeichnet. Derartige Kolben zeichnen sich durch eine hohe Festigkeit und aufgrund der thermischen Entkopplung von Kolbenkopf und Kolbenschaft durch eine hohe Wärmebeständigkeit aus. A generic piston is known, for example, from DE 44 46 726 A1 and is also referred to as a "piston with a thermally decoupled piston shaft." Such pistons are characterized by high strength and high heat resistance due to the thermal decoupling of the piston head and piston shaft.
Aus der DE 10 2004 019 010 A1 ist ein Verschlusselement in Form einer zweigeteilten Tellerfeder bekannt, die im entspannten Zustand umfangsseitig eine unterschiedliche, ortsabhängige, nach radial außen wirkende Federkraft aufweist. In montiertem Zustand liegt die Tellerfeder mit einerkonstanten Flächenpressung an ihren im Kühlkanal ausgeformten Auflagern an, wodurch in diesem Bereich ein übermäßiger Verschleiß vermieden wird. From DE 10 2004 019 010 A1 discloses a closure element in the form of a two-part disc spring is known, which has in the relaxed state circumferentially a different, location-dependent, radially outwardly acting spring force. In the assembled state, the diaphragm spring bears against its supports formed in the cooling channel with a constant surface pressure, which avoids excessive wear in this area.
Die Aufgabe der vorliegenden Erfindung besteht darin, einen gattungsgemäßen Kolben so weiterzuentwickeln, dass der Kühlkanal auf besonders einfache Weise verschlossen ist. The object of the present invention is to develop a generic piston so that the cooling channel is closed in a particularly simple manner.
Die Lösung besteht darin, dass das Verschlusselement aus mindestens zwei Teilelementen besteht, dass jedes Teilelement eine radial ausgerichtete Grundplatte und mindestens einen am äußeren Rand der Grundplatte axial ausgerichteten umlaufenden Kragen aufweist, der in mindestens einem unterhalb der Ringpartie verlaufenden äußeren Falz aufgenommen ist. The solution consists in that the closure element consists of at least two sub-elements, that each sub-element has a radially oriented base plate and at least one circumferential collar axially aligned at the outer edge of the base plate, which is received in at least one outer fold extending below the ring portion.
Bestätigungskopiel Die erfindungsgemäße Idee besteht darin, ein aus mindestens zwei Teilelementen bestehendes Verschlusselement passgenau in den unterhalb der Ringpartie angeordneten äußeren Falz aufzunehmen. Die mindestens zwei Teilelemente sind strukturell sehr einfach aufgebaut und leicht herzustellen. Die Notwendigkeit, eine Federvorspannung einzurichten, entfällt. Die mindestens zwei Teilelemente werden in üblicher Weise am Kolben befestigt. Da keine störenden Spannungen auftreten, ist das erfindungsgemäß ausgestaltete Verschlusselement sicher und dauerhaft am Kolben gehalten. Bestätigungskopiel The idea according to the invention consists of accurately fitting a closure element consisting of at least two partial elements into the outer fold arranged below the annular section. The at least two sub-elements are structurally very simple and easy to manufacture. The need to set up a spring preload is eliminated. The at least two sub-elements are fastened in the usual way on the piston. Since no disturbing voltages occur, the closure element designed according to the invention is securely and permanently held on the piston.
Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen. Advantageous developments emerge from the subclaims.
Der mindestens eine Kragen und/oder die mindestens eine Grundplatte ist zweckmäßigerweise durch Schweißen, Kleben oder Löten am Kolben befestigt. The at least one collar and / or the at least one base plate is expediently attached to the piston by welding, gluing or soldering.
Vorzugsweise ist der mindestens eine Kragen bündig mit der Außenkontur des Kolbenkopfes angeordnet, um im montierten Zustand die Passgenauigkeit im Zylinder zu gewährleisten. Preferably, the at least one collar is arranged flush with the outer contour of the piston head to ensure the fit accuracy in the cylinder in the mounted state.
Jedes Teilelement weist zweckmäßigerweise genau einen durchgehenden Kragen auf. Die Teilelemente können aber auch zwei oder mehrere voneinander beabstan- dete Krägen aufweisen. Each sub-element expediently has exactly one continuous collar. However, the sub-elements can also have two or more spaced-apart collars.
Vorteilhafterweise ist in mindestens einer Grundplatte mindestens eine Öleintritts- und/oder Ölaustrittsöffnung vorgesehen, um die Kühlölzirkulation im Kühlkanal zu gewährleisten. Diese mindestens eine Öleintritts- und/oder Ölaustrittsöffnung ist bevorzugt in den Endbereichen zweier benachbarter Teilelemente ausgebildet. Die hierfür nötigen Ausnehmungen in den Endbereichen können während des Herstellungsprozesses der Teilelemente direkt mit eingeformt werden. Advantageously, at least one oil inlet and / or oil outlet opening is provided in at least one base plate in order to ensure the cooling oil circulation in the cooling channel. This at least one oil inlet and / or oil outlet opening is preferably formed in the end regions of two adjacent sub-elements. The necessary recesses in the end regions can be formed directly during the manufacturing process of the sub-elements.
Der freie Rand der mindestens einen Grundplatte ist bevorzugt vom Kolben beabstandet angeordnet. Der freie Raum zwischen Grundplatte und Kolben kann dann als zusätzliche Kühlaustrittsöffnung dienen. Das Verschlusselement ist zweckmäßigerweise als Blechbauteil ausgebildet. Es kann auch als Federblech ausgebildet sein. In diesem Fall kann, falls dies erwünscht ist, der freie Rand mindestens einer Grundplatte unter Vorspannung am Kolben anliegen. The free edge of the at least one base plate is preferably arranged at a distance from the piston. The free space between base plate and piston can then serve as an additional cooling outlet. The closure element is expediently designed as a sheet metal component. It can also be designed as a spring plate. In this case, if desired, the free edge of at least one base plate may be biased against the piston.
Ein Ausführungsbeispiel der vorliegenden Erfindung wird im Folgenden anhand der beigefügten Zeichnungen näher erläutert. Es zeigen in einer schematischen, nicht maßstabsgetreuen Darstellung: An embodiment of the present invention will be explained in more detail below with reference to the accompanying drawings. In a schematic, not to scale representation:
Figur 1 ein Ausführungsbeispiel eines erfindungsgemäßen Kolbens im Schnitt, wobei die rechte Hälfte gegenüber der linken Hälfte um 90° gedreht dargestellt ist; Figure 1 shows an embodiment of a piston according to the invention in section, wherein the right half opposite the left half is shown rotated by 90 °;
Figur 2 eine vergrößerte perspektivische Darstellung eines Ausführungsbeispiels eines Verschlusselements. Figure 2 is an enlarged perspective view of an embodiment of a closure element.
Figur 1 zeigt ein Ausführungsbeispiel eines erfindungsgemäßen Kolbens 10. Der Kolben 10 weist einen Kolbengrundkörper 11 und ein Kolbenringelement 12 auf. Beide Bauteile können aus jedem beliebigen metallischen Werkstoff bestehen, der zum Fügen der Bauteile geeignet ist. Der Kolbengrundkörper 11 und das Kolbenringelement 12 bilden zusammen den Kolbenkopf 13 und den Kolbenschaft 14 des Kolbens 10. FIG. 1 shows an exemplary embodiment of a piston 10 according to the invention. The piston 10 has a piston main body 11 and a piston ring element 12. Both components can be made of any metallic material that is suitable for joining the components. The piston main body 11 and the piston ring element 12 together form the piston head 13 and the piston shaft 14 of the piston 10.
Der Kolbengrundkörper 11 weist den Kolbenschaft 14 auf, der in an sich bekannter Weise mit Naben 15 und Nabenbohrungen 16 zur Aufnahme eines Kolbenbolzens (nicht dargestellt) sowie mit Laufflächen 17 versehen ist. Der Kolbengrundkörper 11 bildet ferner einen inneren Teil 17a eines Kolbenbodens 17 sowie eine Verbrennungsmulde 18. The piston base body 11 has the piston shaft 14, which is provided in known manner with hubs 15 and hub bores 16 for receiving a piston pin (not shown) and with running surfaces 17. The piston main body 11 further forms an inner part 17a of a piston head 17 and a combustion recess 18th
Das Kolbenringelement 12 bildet einen äußeren Teil 17b des Kolbenbodens 17 und weist ferner einen umlaufenden Feuersteg 19 und eine umlaufende Ringpartie 21 zur Aufnahme von Kolbenringen (nicht dargestellt) auf. Die Naben 15 des Kolbengrundkörpers 11 sind über Nabenanbindungen 22 an der Unterseite des Kolbenkopfs 13 angehängt. Der Kolbenschaft 14 ist durch eine umlaufende ringförmige Ausnehmung 23 von der Ringpartie 21 getrennt. Somit ist der Kolbenschaft 14 vom Kolbenkopf 13 thermisch entkoppelt. The piston ring member 12 forms an outer portion 17b of the piston crown 17 and further includes a circumferential land land 19 and a circumferential ring portion 21 for receiving piston rings (not shown). The hubs 15 of the piston main body 11 are attached via hub connections 22 on the underside of the piston head 13. The piston skirt 14 is separated from the ring section 21 by a circumferential annular recess 23. Thus, the piston skirt 14 is thermally decoupled from the piston head 13.
Der Kolbengrundkörper 11 und das Kolbenringelement 12 sind durch Fügen, im Ausführungsbeispiel bevorzugt mittels Laserschweißen, miteinander verbunden. The piston base body 11 and the piston ring element 12 are joined together by joining, in the exemplary embodiment preferably by means of laser welding.
Dadurch ist im Bereich des Kolbenbodens 17 eine Fügenaht 26 gebildet, welche in diesem Ausführungsbeispiel parallel zur Mittelachse M des Kolbens 10 verläuft. As a result, a joining seam 26 is formed in the region of the piston head 17, which in this embodiment runs parallel to the central axis M of the piston 10.
Der Kolbengrundkörper 11 und das Kolbenringelement 12 bilden zusammen einen umlaufenden Kühlkanal 24, der zwischen der Verbrennungsmulde 18 und der Ringpartie 21 angeordnet und mit einem Verschlusselement 25 verschlossen ist. The piston base body 11 and the piston ring element 12 together form a circumferential cooling channel 24, which is arranged between the combustion bowl 18 and the ring section 21 and is closed by a closure element 25.
Figur 2 zeigt eine vergrößerte perspektivische Darstellung des Verschlusselements 26 des Kolbens 10. Das Verschlusselement 26 ist im Ausführungsbeispiel als Blechbauteil ausgeführt und besteht aus zwei Teilelementen 27, 28. Jedes Teilelement weist eine radial ausgerichtete Grundplatte 29 mit einem freien Rand 29a und genau einen axial ausgerichteten umlaufenden Kragen 31 auf, der am äußeren Rand der jeweiligen Grundplatte 29 angeordnet ist. In den Endbereichen 27a, 27b, 28a, 28b der Teilelemente 27, 28 sind Ausnehmungen vorgesehen, die zusammen je eine Öleintritts- bzw. Ölaustrittsöffnung 32, 33 bilden. 2 shows an enlarged perspective view of the closure element 26 of the piston 10. The closure element 26 is designed in the embodiment as a sheet metal component and consists of two sub-elements 27, 28. Each sub-element has a radially oriented base plate 29 with a free edge 29a and exactly one axially aligned circumferential collar 31 which is disposed on the outer edge of the respective base plate 29. Recesses are provided in the end regions 27a, 27b, 28a, 28b of the subelements 27, 28, which together form an oil inlet or oil outlet opening 32, 33.
Aus Figur 1 ist zu entnehmen, dass jeder umlaufende Kragen 31 in einen äußeren Falz 34 aufgenommen ist, der im Kolbenringelement 11 unterhalb der Ringpartie 21 ausgeformt ist. Jeder Kragen 31 ist bündig mit der Außenkontur des Kolbenringelements 11 ausgebildet. Jedes Teilelement 27, 28 ist im Bereich seiner Grundplatte 29 und/oder im Bereich seines Kragens 31 mittels Schweißen am Kolbenringelement 11 befestigt. Im Ausführungsbeispiel ist der freie Rand 29a jeder Grundplatte 29 vom Kolben 10 beabstandet angeordnet. From Figure 1 it can be seen that each circumferential collar 31 is received in an outer fold 34 which is formed in the piston ring member 11 below the ring portion 21. Each collar 31 is formed flush with the outer contour of the piston ring member 11. Each sub-element 27, 28 is secured in the region of its base plate 29 and / or in the region of its collar 31 by means of welding to the piston ring element 11. In the exemplary embodiment, the free edge 29 a of each base plate 29 is spaced from the piston 10.

Claims

Patentansprüche claims
1. Kolben (10) für einen Verbrennungsmotor, der einen Kolbenschaft (14) sowie einen Kolbenkopf (13) mit einer umlaufenden Ringpartie (21) und mit einem mit einem Verschlusselement (26) verschlossenen umlaufenden Kühlkanal (24) aufweist, wobei zwischen dem Kolbenkopf (13) und dem Kolbenschaft (14) eine umlaufende Ausnehmung (23) ausgebildet ist, dadurch gekennzeichnet, dass das Verschlusselement (26) aus mindestens zwei Teilelementen (27, 28) besteht, dass jedes Teilelement (27, 28) eine radial ausgerichtete Grundplatte (29) und mindestens einen am äußeren Rand (29a) der Grundplatte (29) axial ausgerichteten umlaufenden Kragen (31) aufweist, der in mindestens einem unterhalb der Ringpartie (21) verlaufenden äußeren Falz (34) aufgenommen ist. A piston (10) for an internal combustion engine having a piston skirt (14) and a piston head (13) with a circumferential ring portion (21) and with a closure element (26) closed circumferential cooling channel (24), wherein between the piston head (13) and the piston skirt (14) a circumferential recess (23) is formed, characterized in that the closure element (26) consists of at least two sub-elements (27, 28) that each sub-element (27, 28) has a radially oriented base plate (29) and at least one on the outer edge (29 a) of the base plate (29) axially aligned circumferential collar (31) which is received in at least one below the ring portion (21) extending outer fold (34).
2. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass der mindestens eine Kragen (31) und/oder die mindestens eine Grundplatte (29) am Kolben (10) durch Schweißen, Kleben oder Löten befestigt ist. 2. Piston according to claim 1, characterized in that the at least one collar (31) and / or the at least one base plate (29) on the piston (10) is fixed by welding, gluing or soldering.
3. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass der mindestens eine Kragen (31) bündig mit der Außenkontur des Kolbenkopfes (13) angeordnet ist. 3. Piston according to claim 1, characterized in that the at least one collar (31) is arranged flush with the outer contour of the piston head (13).
4. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass jedes Teilelement (27, 28) genau einen durchgehenden Kragen (31) aufweist. 4. Piston according to claim 1, characterized in that each sub-element (27, 28) has exactly one continuous collar (31).
5. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass in mindestens einer Grundplatte (29) mindestens eine Öleintritts- und/oder Ölaustrittsöffnung (32, 33) vorgesehen ist. 5. Piston according to claim 1, characterized in that in at least one base plate (29) at least one oil inlet and / or oil outlet opening (32, 33) is provided.
6. Kolben nach Anspruch 5, dadurch gekennzeichnet, dass die mindestens eine Öleintritts- und/oder Ölaustrittsöffnung (32, 33) in den Endbereichen (27a, 27b; 28a, 28b) zweier benachbarter Teilelemente (27, 28) ausgebildet ist. 6. Piston according to claim 5, characterized in that the at least one oil inlet and / or oil outlet opening (32, 33) in the end regions (27a, 27b, 28a, 28b) of two adjacent sub-elements (27, 28) is formed.
7. Kolben nach Anspruch 1 , dadurch gekennzeichnet, dass der freie Rand (29a) der mindestens einen Grundplatte (29) vom Kolben (10) beabstandet angeordnet ist. 7. Piston according to claim 1, characterized in that the free edge (29 a) of the at least one base plate (29) from the piston (10) is arranged at a distance.
8. Kolben nach Anspruch 1, dadurch gekennzeichnet, dass das Verschlusselement (26) als Blechbauteil ausgebildet ist. 8. Piston according to claim 1, characterized in that the closure element (26) is designed as a sheet metal component.
9. Kolben nach Anspruch 8, dadurch gekennzeichnet, dass das Verschlusselement (26) als Federblech ausgebildet ist. 9. Piston according to claim 8, characterized in that the closure element (26) is designed as a spring plate.
10. Kolben nach Anspruch 9, dadurch gekennzeichnet, dass der freie Rand (29a) mindestens einer Grundplatte (29) unter Vorspannung am Kolben (10) anliegt. 10. Piston according to claim 9, characterized in that the free edge (29a) at least one base plate (29) under bias on the piston (10) rests.
EP13765618.7A 2012-07-18 2013-07-18 Piston for an internal combustion engine Not-in-force EP2893177B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012014195.5A DE102012014195A1 (en) 2012-07-18 2012-07-18 Piston for an internal combustion engine
PCT/DE2013/000402 WO2015007256A1 (en) 2012-07-18 2013-07-18 Piston for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP2893177A1 true EP2893177A1 (en) 2015-07-15
EP2893177B1 EP2893177B1 (en) 2016-12-28

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ID=49225980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13765618.7A Not-in-force EP2893177B1 (en) 2012-07-18 2013-07-18 Piston for an internal combustion engine

Country Status (7)

Country Link
US (1) US9784211B2 (en)
EP (1) EP2893177B1 (en)
JP (1) JP6195928B2 (en)
CN (1) CN104520567A (en)
BR (1) BR112015001068A2 (en)
DE (1) DE102012014195A1 (en)
WO (1) WO2015007256A1 (en)

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CN109595092A (en) * 2018-12-27 2019-04-09 滨州东海龙活塞有限公司 A kind of method for supporting of piston and piston ring groove

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Also Published As

Publication number Publication date
US9784211B2 (en) 2017-10-10
JP6195928B2 (en) 2017-09-13
CN104520567A (en) 2015-04-15
WO2015007256A1 (en) 2015-01-22
US20150322887A1 (en) 2015-11-12
JP2016515175A (en) 2016-05-26
BR112015001068A2 (en) 2017-06-27
DE102012014195A1 (en) 2014-01-23
EP2893177B1 (en) 2016-12-28
WO2015007256A8 (en) 2015-02-12

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