EP2321513A1 - Kolben für einen verbrennungsmotor - Google Patents
Kolben für einen verbrennungsmotorInfo
- Publication number
- EP2321513A1 EP2321513A1 EP09776111A EP09776111A EP2321513A1 EP 2321513 A1 EP2321513 A1 EP 2321513A1 EP 09776111 A EP09776111 A EP 09776111A EP 09776111 A EP09776111 A EP 09776111A EP 2321513 A1 EP2321513 A1 EP 2321513A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- width
- friction weld
- outer circumferential
- annular
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 238000003466 welding Methods 0.000 claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 239000011324 bead Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
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 disclosed in US 6,557,514 B1.
- 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.
- 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 circumferential friction weld may be greater than or equal to or less than the width of the outer circumferential friction weld. Both Reibsch spall requireharmen be formed in one operation.
- 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 a 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 a 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.
- FIG. 1 shows a first embodiment of a piston according to the invention in section, wherein the left half of the representation opposite the right half is rotated by 90 °.
- FIG. 2A is an enlarged fragmentary view of the piston of FIG. 1; FIG.
- Fig. 2B is an enlarged partial view of another embodiment of a piston according to the invention.
- Figures 1 and 2A show a first embodiment of a piston 10 according to the invention.
- 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 is smaller in the embodiment according to Figures 1 and 2A within the usual manufacturing tolerances 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 a further exemplary embodiment of a piston 110 in a representation comparable to 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 within the usual manufacturing tolerances b1 of the outer friction weld 29.
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)
Abstract
Description
Claims
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 (de) | 2008-09-02 | 2009-08-26 | Kolben für einen verbrennungsmotor |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2321513A1 true EP2321513A1 (de) | 2011-05-18 |
EP2321513B1 EP2321513B1 (de) | 2012-02-01 |
EP2321513B2 EP2321513B2 (de) | 2016-12-21 |
Family
ID=41606146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09776111.8A Not-in-force EP2321513B2 (de) | 2008-09-02 | 2009-08-26 | Kolben für einen verbrennungsmotor |
Country Status (8)
Country | Link |
---|---|
US (1) | US8434400B2 (de) |
EP (1) | EP2321513B2 (de) |
JP (1) | JP5631314B2 (de) |
CN (1) | CN202165174U (de) |
AT (1) | ATE543996T1 (de) |
BR (1) | BRPI0918059A2 (de) |
DE (1) | DE102008045456A1 (de) |
WO (1) | WO2010025703A1 (de) |
Families Citing this family (8)
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)
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 |
-
2008
- 2008-09-02 DE DE102008045456A patent/DE102008045456A1/de not_active Withdrawn
-
2009
- 2009-07-15 US US12/460,196 patent/US8434400B2/en not_active Expired - Fee Related
- 2009-08-26 CN CN2009901005768U patent/CN202165174U/zh not_active Expired - Lifetime
- 2009-08-26 EP EP09776111.8A patent/EP2321513B2/de not_active Not-in-force
- 2009-08-26 BR BRPI0918059A patent/BRPI0918059A2/pt not_active Application Discontinuation
- 2009-08-26 JP JP2011525402A patent/JP5631314B2/ja not_active Expired - Fee Related
- 2009-08-26 WO PCT/DE2009/001189 patent/WO2010025703A1/de active Application Filing
- 2009-08-26 AT AT09776111T patent/ATE543996T1/de active
Non-Patent Citations (1)
Title |
---|
See references of WO2010025703A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2321513B2 (de) | 2016-12-21 |
EP2321513B1 (de) | 2012-02-01 |
WO2010025703A1 (de) | 2010-03-11 |
US8434400B2 (en) | 2013-05-07 |
JP5631314B2 (ja) | 2014-11-26 |
JP2012501408A (ja) | 2012-01-19 |
CN202165174U (zh) | 2012-03-14 |
DE102008045456A1 (de) | 2010-03-04 |
US20100050862A1 (en) | 2010-03-04 |
BRPI0918059A2 (pt) | 2015-12-01 |
ATE543996T1 (de) | 2012-02-15 |
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