EP2321513B1 - Piston pour un moteur à combustion interne - Google Patents

Piston pour un moteur à combustion interne Download PDF

Info

Publication number
EP2321513B1
EP2321513B1 EP09776111A EP09776111A EP2321513B1 EP 2321513 B1 EP2321513 B1 EP 2321513B1 EP 09776111 A EP09776111 A EP 09776111A EP 09776111 A EP09776111 A EP 09776111A EP 2321513 B1 EP2321513 B1 EP 2321513B1
Authority
EP
European Patent Office
Prior art keywords
piston
width
friction welding
welding seam
wall
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
EP09776111A
Other languages
German (de)
English (en)
Other versions
EP2321513B2 (fr
EP2321513A1 (fr
Inventor
Peter Kemnitz
Carmen Klusch
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
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Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP2321513A1 publication Critical patent/EP2321513A1/fr
Publication of EP2321513B1 publication Critical patent/EP2321513B1/fr
Application granted granted Critical
Publication of EP2321513B2 publication Critical patent/EP2321513B2/fr
Not-in-force legal-status Critical Current
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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
    • 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

Definitions

  • the present invention relates to a piston for an internal combustion engine, having a piston lower part and a piston upper part, which are joined together by friction welding and form an outer circumferential cooling channel, wherein the piston upper part has an annular groove provided with annular ring portion whose inner wall delimiting the peripheral outer cooling channel.
  • a generic piston is in the US 6,557,514 B1 disclosed.
  • the outer peripheral friction weld between the piston lower part and the piston upper part is arranged in the region of the ring part between two annular grooves.
  • stresses are built up during friction welding, which affect the stability of the piston.
  • a friction welded piston is also used in the US 2003/0051694 A1 shown.
  • the object of the present invention is thus to further develop a generic piston so that the risk of tension is reduced and the stability of the piston is improved.
  • the solution consists in a piston having the features of claim 1.
  • the invention provides that below the ring section an outer circumferential friction weld is provided whose width is at most equal to the wall thickness between the respective groove bottom of the annular grooves and the inner wall of the ring section.
  • the piston according to the invention is very stable despite the significantly reduced width of the friction weld seam (and, concomitantly, the significantly reduced wall thickness of the ring section in the area of the friction weld seam) compared with the prior art.
  • the piston according to the invention has improved flexibility.
  • the piston according to the invention can better absorb the forces acting on the piston crown in the combustion process and derive more uniformly about its structure.
  • Another great advantage of the piston according to the invention is that a material and weight saving is achieved by reducing the wall thickness in the region of the outer circumferential friction weld.
  • the width of the outer circumferential friction weld is preferably the same as the wall thickness between the respective groove bottom of the annular grooves and the inner wall of the ring portion, whereby an optimal power flow with optimum material utilization can be achieved.
  • the piston according to the invention has between an inner region and the outer circumferential cooling channel supporting elements, which are connected to each other via an inner circumferential friction weld.
  • the width of the inner peripheral friction weld may be greater than or equal to or less than the width of the outer circumferential friction weld.
  • the width of the inner friction weld is less than previously known in the art. Nevertheless, the piston according to the invention is very stable for the reasons described above.
  • the piston lower part and the piston upper part form a depression along at least one friction welding seam into which a possibly formed welding bead is received in order to maximize the possible along the friction welding seam to obtain a uniform surface and in particular not to reduce the size of the cooling channel and the cooling oil flow not by turbulence u.
  • a possibly formed welding bead is received in order to maximize the possible along the friction welding seam to obtain a uniform surface and in particular not to reduce the size of the cooling channel and the cooling oil flow not by turbulence u.
  • FIGS. 1 and 2A show a first embodiment of an inventive- ⁇ en piston 10.
  • the piston 10 has a piston lower part 15 and a piston upper part 12, which are interconnected by friction welding.
  • the piston lower part and the piston upper part 12 may be made of any metallic material that is amenable to machining by friction welding.
  • the piston lower part 15 has a piston shaft 14 and provided with hub bores 17 pin bosses 16.
  • the piston upper part 12 has a piston bottom 13, which is provided in the exemplary embodiment with a combustion bowl 11.
  • an outer circumferential fire bar 18 connects.
  • a circumferential ring portion 20 is provided, which is provided in the embodiment with three circumferential annular grooves 21, 22, 23 for piston rings (not shown).
  • the piston lower part 15 and the piston upper part 12 also together form an outer circumferential cooling channel 19.
  • the piston upper part 12 is provided with a circumferential outer support member 25 and a circumferential inner support member 27.
  • the lower piston part 15 is likewise provided with a circumferential outer support element 26 and a circumferential inner support element 28.
  • the outer support elements 25, 26 form an outer circumferential friction weld 29 below the ring section 20, while the inner support elements 27, 28 form an inner circumferential friction weld 30 below the piston head 13.
  • the inner support elements 27, 28 separate the outer circumferential cooling channel 19 from an inner region 24 of the piston 10.
  • the inner wall 20 'of the annular portion 20 forms the outer wall of the outer circumferential cooling channel 19th
  • the outer Reibsch spat 29 has a width b1, which is the same in the embodiment in the context of the usual manufacturing tolerances as the wall thickness d of the ring portion 20 between the respective groove bottom 21 ', 22', 23 'of the annular grooves 21, 22, 23 and the inner wall 20 'of the ring section 20.
  • the inner friction weld 30 has a width b2, which in the embodiment according to the FIGS. 1 and 2A in the context of the usual manufacturing tolerances is smaller than the width b1 of the outer friction weld 29. But the width b2 can also be exactly as large as the width b1.
  • the outer and inner support elements 26, 28 and 25, 27 of the lower piston part 15 and the piston upper part 12 are configured in the embodiment in the region of the friction welds 30, 29 such that the outer circumferential cooling channel 19 and the inner region 24 aligned, in the exemplary embodiment rotating , Troughs 31 are formed.
  • the Sch undulste 32 are added, which may arise during the Reibsch dovorgangs.
  • the surfaces of the walls of the cooling channel 19 are comparatively smooth.
  • the volume of the cooling channel 19 for receiving cooling oil remains unaffected.
  • the cooling oil in the cooling channel 19 can flow substantially without interference. The cooling effect of the cooling oil thus remains substantially preserved in this advantageous embodiment of the piston according to the invention.
  • FIG. 2B shows in one with the FIG. 2A
  • the piston 110 differs from the piston 10 only in that the internal friction weld 130 has a width b3, which is greater than the width b1 of the outer friction weld 29 in the context of the usual manufacturing tolerances.

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 (6)

  1. Piston (10, 110) pour moteur à combustion interne, comportant une partie inférieure de piston (15) et une partie supérieure de piston (12), qui sont reliées ensemble par soudure par friction et forment un canal de refroidissement périphérique externe (19), la partie supérieure de piston (12) présentant une partie annulaire périphérique (20) dotée de gorges annulaires (21, 22, 23), la paroi interne (20') de la partie annulaire délimitant le canal de refroidissement périphérique externe (19), caractérisé en ce que sous la partie annulaire (20) est prévue une soudure par friction périphérique externe (29), dont la largeur (b1) est au plus égale à l'épaisseur de paroi (d) entre le fond de gorge respectif (21', 22', 23') des gorges annulaires (21, 22, 23) et la paroi interne (20') de la partie annulaire (20).
  2. Piston selon la revendication 1, caractérisé en ce que la largeur (b1) de la soudure par friction périphérique externe (29) est égale à l'épaisseur de paroi (d) entre le fond de gorge respectif (21', 22', 23') des gorges annulaires (21, 22, 23) et la paroi interne (20') de la partie annulaire (20).
  3. Piston selon la revendication 1 ou 2, caractérisé en ce qu'entre une zone interne (24) du piston (10, 110) et le canal de refroidissement périphérique externe (19) est prévue une soudure par friction périphérique interne (30, 130).
  4. Piston selon la revendication 3, caractérisé en ce que la largeur (b3) de la soudure par friction périphérique interne (130) est au moins égale à la largeur (b1) de la soudure par friction périphérique externe (29).
  5. Piston selon la revendication 3, caractérisé en ce que la largeur (b2) de la soudure par friction périphérique interne (30) est inférieure à la largeur (b1) de la soudure par friction périphérique externe (29).
  6. Piston selon l'une des revendications précédentes, caractérisé en ce que la partie inférieure de piston (15) et la partie supérieure de piston (12) forment le long d'au moins une soudure par friction (29 ; 30, 130) une cavité (31), dans laquelle est logé un cordon de soudure (32) éventuellement formé.
EP09776111.8A 2008-09-02 2009-08-26 Piston pour un moteur à combustion interne Not-in-force EP2321513B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008045456A DE102008045456A1 (de) 2008-09-02 2008-09-02 Kolben für einen Verbrennungsmotor
PCT/DE2009/001189 WO2010025703A1 (fr) 2008-09-02 2009-08-26 Piston pour un moteur à combustion interne

Publications (3)

Publication Number Publication Date
EP2321513A1 EP2321513A1 (fr) 2011-05-18
EP2321513B1 true EP2321513B1 (fr) 2012-02-01
EP2321513B2 EP2321513B2 (fr) 2016-12-21

Family

ID=41606146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09776111.8A Not-in-force EP2321513B2 (fr) 2008-09-02 2009-08-26 Piston pour un moteur à combustion interne

Country Status (8)

Country Link
US (1) US8434400B2 (fr)
EP (1) EP2321513B2 (fr)
JP (1) JP5631314B2 (fr)
CN (1) CN202165174U (fr)
AT (1) ATE543996T1 (fr)
BR (1) BRPI0918059A2 (fr)
DE (1) DE102008045456A1 (fr)
WO (1) WO2010025703A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010033879A1 (de) * 2010-08-10 2012-02-16 Mahle International Gmbh Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor sowie Kolben für einen Verbrennungsmotor
US9216474B2 (en) 2012-04-24 2015-12-22 Industrial Parts Depot, Llc Two-piece friction-welded piston
DE102012008947A1 (de) * 2012-05-05 2013-11-07 Mahle International Gmbh Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor
US9243709B2 (en) * 2013-03-14 2016-01-26 Mahle International Gmbh Welded piston assembly
CN103437898A (zh) * 2013-09-22 2013-12-11 中国北方发动机研究所(天津) 一种带环形槽的柴油机活塞
US10449621B2 (en) * 2014-05-01 2019-10-22 Mahle International Gmbh Magnetic arc welded piston assembly
US10711732B2 (en) * 2017-01-19 2020-07-14 Industrial Parts Depot, Llc Reduced height piston
CN114810410B (zh) * 2022-05-10 2023-08-18 潍柴动力股份有限公司 一种活塞及发动机

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2537182A1 (de) * 1975-08-21 1977-03-03 Motoren Turbinen Union Kolben
US5769306A (en) * 1996-05-31 1998-06-23 The Boeing Company Weld root closure method for friction stir welds
US6213379B1 (en) * 1997-08-27 2001-04-10 Lockheed Martin Corporation Friction plug welding
US5934174A (en) * 1998-10-02 1999-08-10 Cummins Engine Company, Inc. Lightweight articulated piston head and method of making the piston head
JP2003025076A (ja) † 2001-07-09 2003-01-28 Riken Tanzou Kk 内燃機関のピストン製造方法
US6539910B1 (en) * 2001-09-19 2003-04-01 Federal-Mogul World Wide, Inc. Closed gallery piston having con rod lubrication
US6557514B1 (en) 2001-10-23 2003-05-06 Federal-Mogul World Wide, Inc. Closed gallery monobloc piston having oil drainage groove
DE10210570A1 (de) * 2002-03-09 2003-09-18 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
DE10228103A1 (de) 2002-06-24 2004-01-15 Bayer Cropscience Ag Fungizide Wirkstoffkombinationen
DE10244512A1 (de) * 2002-09-25 2004-04-15 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
US6825450B2 (en) * 2002-11-06 2004-11-30 Federal-Mogul World Wide, Inc. Piston and method of manufacture
DE10325914B4 (de) * 2003-06-07 2012-08-02 Mahle Gmbh Kolben für einen Verbrennungsmotor
US7563748B2 (en) 2003-06-23 2009-07-21 Cognis Ip Management Gmbh Alcohol alkoxylate carriers for pesticide active ingredients
US7005620B2 (en) * 2003-11-04 2006-02-28 Federal-Mogul World Wide, Inc. Piston and method of manufacture
US7104183B2 (en) * 2004-07-07 2006-09-12 Karl Schmidt Unisia, Inc. One-piece steel piston
DE102004061778A1 (de) * 2004-09-29 2006-04-06 Ks Kolbenschmidt Gmbh Einfach-Reibschweißung
JP2006150397A (ja) * 2004-11-29 2006-06-15 Hitachi Metals Ltd リングプロジェクション溶接方法およびリングプロジェクション溶接部材
US8011288B2 (en) * 2005-09-17 2011-09-06 Ks Kolbenschmidt Gmbh Piston, especially cooling channel piston, comprising three friction-welded zones
DE102006027354A1 (de) * 2006-06-13 2007-12-20 Mahle International Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
DE102007027162A1 (de) * 2007-06-13 2008-12-18 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
DE102008011922A1 (de) * 2008-02-29 2009-09-03 Ks Kolbenschmidt Gmbh Kolben für Brennkraftmaschinen, hergestellt mittels eines Multi-Orbitalen Reibschweißverfahrens

Also Published As

Publication number Publication date
JP2012501408A (ja) 2012-01-19
US20100050862A1 (en) 2010-03-04
ATE543996T1 (de) 2012-02-15
CN202165174U (zh) 2012-03-14
US8434400B2 (en) 2013-05-07
DE102008045456A1 (de) 2010-03-04
BRPI0918059A2 (pt) 2015-12-01
EP2321513B2 (fr) 2016-12-21
WO2010025703A1 (fr) 2010-03-11
EP2321513A1 (fr) 2011-05-18
JP5631314B2 (ja) 2014-11-26

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