EP2893177B1 - Piston pour moteur à combustion interne - Google Patents

Piston pour moteur à combustion interne Download PDF

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Publication number
EP2893177B1
EP2893177B1 EP13765618.7A EP13765618A EP2893177B1 EP 2893177 B1 EP2893177 B1 EP 2893177B1 EP 13765618 A EP13765618 A EP 13765618A EP 2893177 B1 EP2893177 B1 EP 2893177B1
Authority
EP
European Patent Office
Prior art keywords
piston
base plate
collar
piston according
sub
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
EP13765618.7A
Other languages
German (de)
English (en)
Other versions
EP2893177A1 (fr
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/fr
Application granted granted Critical
Publication of EP2893177B1 publication Critical patent/EP2893177B1/fr
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
    • 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, for example, from the DE 44 46 726 A1 known and is also referred to as "piston with thermally decoupled piston shaft". Such pistons are characterized by a high strength and due to the thermal decoupling of piston head and piston skirt by a high heat resistance.
  • a closure element in the form of a two-part disc spring known in the relaxed state circumferentially a different, location-dependent, radially outwardly acting spring force.
  • the diaphragm spring bears against its supports formed in the cooling channel with a constant surface pressure, which avoids excessive wear in this area.
  • 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 may 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.
  • FIG. 1 shows an 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 comprises 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. 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.
  • 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.
  • FIG. 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 arranged 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.

Landscapes

  • 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)

Claims (10)

  1. Piston (10) pour un moteur à combustion interne, qui présente une tige de piston (14) ainsi qu'une tête de piston (13) avec une partie annulaire (21) périphérique et un canal de refroidissement (24) périphérique fermé par un élément de fermeture (26), dans lequel un évidement (23) périphérique est réalisé entre la tête de piston (13) et la tige de piston (14), dans lequel
    l'élément de fermeture (26) est constitué d'au moins deux éléments partiels (27, 28), caractérisé en ce
    que chaque élément partiel (27, 28) présente une plaque de base (29) orientée de manière radiale et au moins un collet (31) périphérique orienté de manière axiale au niveau du bord (29a) extérieur de la plaque de base (29), lequel est logé dans au moins un pli (34) extérieur s'étendant en dessous de la partie annulaire (21).
  2. Piston selon la revendication 1, caractérisé en ce que l'au moins un collet (31) et/ou l'au moins une plaque de base (29) sont fixés au niveau du piston (10) par soudage, collage ou brasage.
  3. Piston selon la revendication 1, caractérisé en ce que l'au moins un collet (31) est disposé au même niveau que le contour extérieur de la tête de piston (13).
  4. Piston selon la revendication 1, caractérisé en ce que chaque élément partiel (27, 28) présente précisément un collet (31) continu.
  5. Piston selon la revendication 1, caractérisé en ce qu'au moins une ouverture d'entrée d'huile et/ou de sortie d'huile (32, 33) est prévue dans au moins une plaque de base (29).
  6. Piston selon la revendication 5, caractérisé en ce que l'au moins une ouverture d'entrée d'huile et/ou de sortie d'huile (32, 33) est réalisée dans les zones d'extrémité (27a, 27b ; 28a, 28b) de deux éléments partiels (27, 28) adjacents.
  7. Piston selon la revendication 1, caractérisé en ce que le bord (29a) libre de l'au moins une plaque de base (29) est disposé à distance du piston (10).
  8. Piston selon la revendication 1, caractérisé en ce que l'élément de fermeture (26) est réalisé sous la forme d'un composant en tôle.
  9. Piston selon la revendication 8, caractérisé en ce que l'élément de fermeture (26) est réalisé sous la forme d'une tôle élastique.
  10. Piston selon la revendication 9, caractérisé en ce que le bord (29a) libre au moins d'une plaque de base (29) repose sous précontrainte au niveau du piston (10).
EP13765618.7A 2012-07-18 2013-07-18 Piston pour moteur à combustion interne Not-in-force EP2893177B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012014195.5A DE102012014195A1 (de) 2012-07-18 2012-07-18 Kolben für einen Verbrennungsmotor
PCT/DE2013/000402 WO2015007256A1 (fr) 2012-07-18 2013-07-18 Piston pour moteur à combustion interne

Publications (2)

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

Family

ID=49225980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13765618.7A Not-in-force EP2893177B1 (fr) 2012-07-18 2013-07-18 Piston pour moteur à combustion interne

Country Status (7)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109595092A (zh) * 2018-12-27 2019-04-09 滨州东海龙活塞有限公司 一种活塞及活塞环槽的支撑方法

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US4377967A (en) * 1981-03-27 1983-03-29 Mack Trucks, Inc. Two-piece piston assembly
DE3643039A1 (de) * 1986-12-17 1988-06-30 Mahle Gmbh Kuehlbarer tauchkolben fuer verbrennungsmotoren
BR8803970A (pt) 1988-07-15 1990-03-20 Metal Leve Sa Embolo articulado refrigerado
DE3991677T1 (de) * 1989-05-25 1991-06-06 Caterpillar Inc Gelenkiger kolben mit einer ein bestimmtes volumen aufweisenden kuehlausnehmung
US4986167A (en) 1989-05-25 1991-01-22 Caterpillar Inc. Articulated piston with a cooling recess having a preestablished volume therein
BR9005376A (pt) * 1990-10-18 1992-06-16 Metal Leve Sa Embolo bipartido com fechamento postico de galeria e processo para sua obtencao
JP3224389B2 (ja) * 1990-12-13 2001-10-29 マーレ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 内燃機関用の多部分から構成された冷却式ピストン
DE4124634A1 (de) * 1991-07-25 1993-01-28 Mahle Gmbh Mehrteiliger, gekuehlter kolben fuer verbrennungsmotoren
DE4430137B4 (de) * 1994-08-25 2004-07-22 Mahle Gmbh Mehrteiliger, gekühlter Kolben für Verbrennungsmotoren
DE4446726A1 (de) 1994-12-24 1996-06-27 Mahle Gmbh Verfahren zur Herstellung eines einteiligen Kühlkanalkolbens
DE19926567A1 (de) * 1999-06-11 2000-12-14 Mahle Gmbh Gekühlter Kolben für Verbrennungsmotoren
US6401595B1 (en) 2000-10-18 2002-06-11 Caterpillar Inc. Piston for an internal combustion engine and method of assembly
DE10110889C1 (de) 2001-03-07 2002-10-02 Ks Kolbenschmidt Gmbh Verfahren zur Herstellung eines Kühlkanalkolbens, sowie ein nach dem Verfahren hergestellter Kühlkanalkolben
DE10132446A1 (de) * 2001-07-04 2003-01-30 Ks Kolbenschmidt Gmbh Kolben, bestehend aus zusammengeschweißtem Ober- und Unterteil
DE10132447A1 (de) * 2001-07-04 2003-01-09 Ks Kolbenschmidt Gmbh Kolben mit angeschweißter Abdeckung des Kühlkanals
DE10301367A1 (de) 2003-01-16 2004-07-29 Mahle Gmbh Verfahren zum Einbringen von Shakerbohrungen in den Kühlkanal eines einteiligen Kolbens
DE10326456A1 (de) * 2003-06-12 2004-12-30 Mahle Gmbh Kolben für einen Verbrennungsmotor
DE102004019011A1 (de) 2004-04-20 2005-11-17 Mahle Gmbh Kühlkanalabdeckung für einen Kolben eines Verbrennungsmotors
DE102004019010A1 (de) 2004-04-20 2005-11-17 Mahle Gmbh Kühlkanalabdeckung für einen Kolben eines Verbrennungsmotors
DE102005037175A1 (de) 2005-08-06 2007-02-08 Mahle International Gmbh Kolben für einen Verbrennungsmotor sowie Abdeckring für den Kühlkanal eines solchen Kolbens
DE102006045728A1 (de) * 2006-09-27 2008-04-03 Mahle International Gmbh Einteiliger Kolben für einen Verbrennungsmotor
DE102008055908A1 (de) * 2008-11-05 2010-05-06 Mahle International Gmbh Mehrteiliger Kolben für einen Verbrennungsmotor

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Also Published As

Publication number Publication date
JP6195928B2 (ja) 2017-09-13
DE102012014195A1 (de) 2014-01-23
WO2015007256A1 (fr) 2015-01-22
US9784211B2 (en) 2017-10-10
BR112015001068A2 (pt) 2017-06-27
WO2015007256A8 (fr) 2015-02-12
EP2893177A1 (fr) 2015-07-15
JP2016515175A (ja) 2016-05-26
US20150322887A1 (en) 2015-11-12
CN104520567A (zh) 2015-04-15

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