EP1926902B1 - Piston, en particulier piston a canal de refroidissement, comportant au moins trois zones de soudure par friction - Google Patents

Piston, en particulier piston a canal de refroidissement, comportant au moins trois zones de soudure par friction Download PDF

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Publication number
EP1926902B1
EP1926902B1 EP05784012A EP05784012A EP1926902B1 EP 1926902 B1 EP1926902 B1 EP 1926902B1 EP 05784012 A EP05784012 A EP 05784012A EP 05784012 A EP05784012 A EP 05784012A EP 1926902 B1 EP1926902 B1 EP 1926902B1
Authority
EP
European Patent Office
Prior art keywords
joining
piston
cooling
webs
duct
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
EP05784012A
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German (de)
English (en)
Other versions
EP1926902A1 (fr
Inventor
Volker Gniesmer
Gerhard Luz
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
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KS Kolbenschmidt GmbH
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Application filed by KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Publication of EP1926902A1 publication Critical patent/EP1926902A1/fr
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Publication of EP1926902B1 publication Critical patent/EP1926902B1/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 
    • F02F3/0015—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 cooling channel piston of an internal combustion engine according to the features of the preamble of patent claim 1.
  • a cooling channel piston of an internal combustion engine which consists of exactly two parts. These parts are an upper part, which here has a radially encircling ring field and a combustion bowl. As a further part, a lower part is provided, which receives the piston skirt and the pin bore. At the lower edge of the ring field and at the deepest vertex of the combustion chamber trough radially two circumferential joining webs are present on the upper part, which correspond in position and extension with two joint webs of the lower part. These two separately producible parts are inseparably connected to each other by means of a joining process, which is a friction welding process. Thereafter, a one-piece cooling channel piston is available, which can be installed in the internal combustion engine, optionally after it has been finished.
  • the Patent Abstracts of Japan JP 52 031213 A show a cooling channel piston, wherein a cooling channel is arranged radially behind a ring field of a piston and is located completely in the lower part of the piston.
  • a flat-forming upper part is arranged on the upper side of the cooling channel piston, which together with the correspondingly shaped lower part of the cooling channel piston forms a further multiplicity of small cooling channels, which are concentrically nested in one another and connected to one another.
  • cooling channel piston of an internal combustion engine having an upper part and a lower part known, wherein the upper part together with the lower part forms at least one radially behind a ring field arranged cooling channel.
  • this cooling channel piston upper part and lower part are only connected to each other via two radially encircling and corresponding joining webs.
  • the invention is therefore the object of developing a genericdekanalkolben such that it has improved properties in terms of its strength and long-term stability.
  • a cooling channel piston of an internal combustion engine is provided with an upper part and a lower part which can be produced separately and joined together in a friction welding process, wherein the upper part together with the lower part forms at least one cooling channel arranged radially behind a ring field and wherein furthermore the upper part is at least three radially surrounding joining webs and the lower part also has at least three radially surrounding joining webs which are brought together during a joining operation and over which the upper part is firmly connected to the lower part.
  • two joining webs of the upper part and the lower part are arranged coaxially within four joining webs, so that the upper part with the lower part not only two joining areas, as it was previously known, but three (or possibly even more) joining areas are connected.
  • top and bottom can be made in the same or different processes (such as forging, casting, pressing, extrusion, and the like) and made of the same or different materials.
  • the upper part may be made of a more heat-resistant material than the lower part.
  • Weight aspects also play a role here.
  • the upper part made of a lightweight material (such as aluminum), while the lower part of a ferrous material (for example, gray cast iron) consists.
  • the invention provides that the upper part and the lower part are designed such that they form a further cooling channel with the further joining webs.
  • the cooling channel piston not only has a cooling channel lying almost directly behind the annular field, but also at least one further cooling channel within which a cooling medium (in particular engine oil) can circulate, around the piston head (in particular the region below the combustion chamber recess) ) to be able to cool.
  • a cooling medium in particular engine oil
  • three cooling areas can be created, which is an outer and a middle cooling channel and the third area is below the apex of the combustion bowl.
  • the joining webs in three different joint areas have approximately the same cross-section. This will be within the piston crown achieved a nearly equal structural strength.
  • the almost same cross-section also has an advantageous effect on the joining process, since always the same amounts of energy applied and not consuming coordinated with each other.
  • FIG. 1 shows a cooling channel piston having an upper part 2 and a lower part 3.
  • the upper part 2 has in known manner a combustion bowl 4 and a radially encircling ring field 5 with unspecified annular grooves.
  • the lower part 3 is added, which in turn has a pin bore 6 and a piston skirt 7.
  • the upper part 2 is in particular connected to the lower part 3 with a friction welding process in three joining regions 8 to 10.
  • a joining web 11 of the upper part 2 and a joining web 12 of the lower part 3 are opposite.
  • a joining web 13 of the upper part 2 and a joining web 14 of the lower part 3 are opposite.
  • a joining web 15 of the upper part 2 and a joining web 16 of the lower part 3 are arranged.
  • the first joining area 11 is in a first joining plane 17 and the second joining regions 9, 10 are both arranged in a second joining plane 18.
  • the upper part 2 and the lower part 13 are designed so that they form a lying behind the ring field 5 cooling channel 19 with their radially surrounding joining webs 11.
  • the two further joining areas 9, 10 create a cavity between them which leads to a better distribution of forces and to a reduction in weight in the piston crown.
  • FIG. 2 shows the cooling channel piston 1, which also has three joining areas 8 to 10 with associated joining webs 11 to 16.
  • the first joining region 8 is located approximately below the annular field 5, while the second joining region 9 is present approximately at the lowest vertex of the combustion chamber trough 4.
  • the third joining region 10 is arranged with its mutually opposite joining webs 15, 16 on the axis of movement of the stroke of the cooling channel piston 1 during its operation. This in turn leads to the already in FIG. 1 described cooling channel 19, while here, due to the design of the upper part 2 and the lower part 3 with the joining webs 13 to 16 coaxially behind the cooling channel 19 lying further cooling channel 21 is created.
  • the openings for the supply and the flow of the circulating in the cooling channel 19, 21 cooling medium are present, but omitted here for the sake of clarity (as well as in the other figures).
  • the joining webs 11 to 17 have different cross-sections and lie in different joining planes 17, 18, 20.
  • FIG. 3 shows the cooling channel piston 1, in which also three joining regions 8 to 10 are present, wherein the joining webs 11 to 16 have almost the same cross-section, but in three different joining planes 17, 18, 20 are arranged. Again, two cooling channels 19, 21 are available again.
  • FIG. 4 shows the cooling channel piston 1 with three joining areas 8 to 10 and the associated joining webs 11 to 16, wherein the joining webs have almost the same cross-section, but (stepped) in three mutually different joining plane 17, 18, 20 are arranged. Due to the design of the lower part 2 not only two cooling channels 19, 21 are formed, but it is in the inner region 22 (which extends below the upper vertex of the combustion bowl 4) realized another closed space, which can also act as a cooling area.

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  • 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)
  • Pressure Welding/Diffusion-Bonding (AREA)

Claims (8)

  1. Piston à canal de refroidissement (1) d'un moteur à combustion interne, comprenant une partie supérieure (2) et une partie inférieure (3) qui peuvent être fabriquées séparément l'une de l'autre et qui peuvent ensuite être assemblées dans une opération de soudage par friction, la partie supérieure (2) formant, conjointement avec la partie inférieure (3), au moins un canal de refroidissement (19) disposé radialement derrière un champ annulaire (5), et la partie supérieure (2) présentant en outre au moins trois nervures d'assemblage (11, 13, 15) radialement circonférentielles et la partie inférieure (3) présentant également au moins trois nervures d'assemblage (12, 14) radialement circonférentielles, qui, pendant une opération d'assemblage, sont rapprochées les unes des autres et par le biais desquelles la partie supérieure (2) est connectée fixement à la partie inférieure (3).
  2. Piston à canal de refroidissement (1) dans lequel la partie supérieure (2) et la partie inférieure (3) sont réalisées de telle sorte qu'elles forment avec leurs nervures d'assemblage (11 à 14) un canal de refroidissement (19), selon la revendication 1, caractérisé en ce que la partie inférieure (3) et la partie supérieure (2) sont configurées de telle sorte qu'elles forment avec leurs autres nervures d'assemblage (15, 16) au moins un autre canal de refroidissement (21).
  3. Piston ou piston à canal de refroidissement (1) selon la revendication 1 ou 2, caractérisé en ce que les nervures d'assemblage (11 à 16) présentent, dans trois régions d'assemblage identiques (8 à 10), ou dans des régions d'assemblage différentes les unes des autres (8 à 10), approximativement une section transversale identique.
  4. Piston ou piston à canal de refroidissement (1) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les faces d'appui des nervures d'assemblage tournées les unes vers les autres (11 à 16) se situent dans trois plans d'assemblage identiques.
  5. Piston ou piston à canal de refroidissement (1) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les faces d'appui des nervures d'assemblage tournées les unes vers les autres (11 à 16) se situent dans trois plans d'assemblage différents.
  6. Piston ou piston à canal de refroidissement (1) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les faces d'appui des nervures d'assemblage tournées les unes vers les autres (11 à 16) se situent dans deux plans d'assemblage identiques et dans un plan d'assemblage différent de ceux-ci.
  7. Piston ou piston à canal de refroidissement (1) selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la partie supérieure (2) se compose du même matériau que la partie inférieure (3).
  8. Piston ou piston à canal de refroidissement (1) selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la partie supérieure (2) se compose d'un matériau différent de celui de la partie inférieure (3).
EP05784012A 2005-09-17 2005-09-17 Piston, en particulier piston a canal de refroidissement, comportant au moins trois zones de soudure par friction Not-in-force EP1926902B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2005/010061 WO2007031107A1 (fr) 2005-09-17 2005-09-17 Piston, en particulier piston a canal de refroidissement, comportant au moins trois zones de soudure par friction

Publications (2)

Publication Number Publication Date
EP1926902A1 EP1926902A1 (fr) 2008-06-04
EP1926902B1 true EP1926902B1 (fr) 2010-04-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05784012A Not-in-force EP1926902B1 (fr) 2005-09-17 2005-09-17 Piston, en particulier piston a canal de refroidissement, comportant au moins trois zones de soudure par friction

Country Status (5)

Country Link
US (1) US8011288B2 (fr)
EP (1) EP1926902B1 (fr)
AT (1) ATE464466T1 (fr)
DE (1) DE502005009435D1 (fr)
WO (1) WO2007031107A1 (fr)

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US9238283B2 (en) * 2008-07-24 2016-01-19 Ks Kolbenschmidt Gmbh Friction welded steel piston having optimized cooling channel
DE102008045456A1 (de) † 2008-09-02 2010-03-04 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102008055848A1 (de) 2008-11-04 2010-05-06 Ks Kolbenschmidt Gmbh Kühlkanalkolben einer Brennkraftmaschine mit einem Verschlusselement, das den Kühlkanal verschließt
DE102009058176A1 (de) * 2008-12-15 2011-01-13 Ks Kolbenschmidt Gmbh Einteiliger Kolben aus Stral mit optimiertem Mehrkomponentenkühlsystem
US9334957B2 (en) 2009-12-23 2016-05-10 Federal-Mogul Corporation Piston having dual gallery, method of construction, and piston body portions thereof
US8327537B2 (en) 2009-12-23 2012-12-11 Federal Mogul Corporation Reinforced dual gallery piston and method of construction
US9856820B2 (en) 2010-10-05 2018-01-02 Mahle International Gmbh Piston assembly
US8973484B2 (en) * 2011-07-01 2015-03-10 Mahle Industries Inc. Piston with cooling gallery
DE102011116332A1 (de) * 2011-07-05 2013-01-10 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102012206392A1 (de) * 2012-04-18 2013-10-24 Mahle International Gmbh Kolben für eine Brennkraftmaschine
WO2014004906A1 (fr) * 2012-06-27 2014-01-03 Mahle International Gmbh Piston doté d'une rampe de refroidissement et chambre à collerette fermée
KR101449304B1 (ko) * 2013-06-27 2014-10-08 현대자동차주식회사 자동차 엔진용 피스톤의 제조 방법
MX2018013353A (es) 2016-05-04 2019-02-20 Ks Kolbenschmidt Gmbh Piston.
US11067033B2 (en) * 2017-05-17 2021-07-20 Tenneco Inc. Dual gallery steel piston
DE102017210818A1 (de) * 2017-06-27 2018-12-27 Mahle International Gmbh Verfahren zur Herstellung eines Kolbens für eine Brennkraftmaschine aus einem Kolbenoberteil und aus einem Kolbenunterteil
CN114278455B (zh) * 2020-09-27 2023-12-19 马勒汽车技术（中国）有限公司 具有分流式内冷流道的活塞
WO2022098433A1 (fr) * 2020-11-05 2022-05-12 Industrial Parts Depot, Llc Piston à trois soudures

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Also Published As

Publication number Publication date
US8011288B2 (en) 2011-09-06
ATE464466T1 (de) 2010-04-15
US20080229923A1 (en) 2008-09-25
EP1926902A1 (fr) 2008-06-04
DE502005009435D1 (de) 2010-05-27
WO2007031107A1 (fr) 2007-03-22

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