EP1546536A1 - Piston monobloc a conduite de refroidissement pour moteur a combustion interne - Google Patents

Piston monobloc a conduite de refroidissement pour moteur a combustion interne

Info

Publication number
EP1546536A1
EP1546536A1 EP03769202A EP03769202A EP1546536A1 EP 1546536 A1 EP1546536 A1 EP 1546536A1 EP 03769202 A EP03769202 A EP 03769202A EP 03769202 A EP03769202 A EP 03769202A EP 1546536 A1 EP1546536 A1 EP 1546536A1
Authority
EP
European Patent Office
Prior art keywords
piston
cooling channel
bores
circumference
cooling
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
EP03769202A
Other languages
German (de)
English (en)
Other versions
EP1546536B1 (fr
Inventor
Hans-Jürgen Köhnert
Peter Kemnitz
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 GmbH
Original Assignee
Mahle 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=31502553&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1546536(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mahle GmbH filed Critical Mahle GmbH
Publication of EP1546536A1 publication Critical patent/EP1546536A1/fr
Application granted granted Critical
Publication of EP1546536B1 publication Critical patent/EP1546536B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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 
    • F02F3/16—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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel

Definitions

  • the invention relates to a one-piece cooling channel piston for an internal combustion engine, with a piston head forged from steel, which comprises a combustion bowl in the piston crown, an annular wall with a ring section and a closed cooling channel running around the ring section, a piston shaft being connected to the hubs attached to the piston head.
  • Generic one-piece cooling channel pistons are known for example from EP 0 799 373 B1 or DE 100 13 395 C1.
  • a piston blank is produced by forging, an annular recess and the cooling channel which is open at the bottom are machined, and the outer contour of the piston is then finished.
  • the axial height of the annular recess corresponds at least to the axial height of the cooling channel. This is necessary because a hook-shaped turning tool has to be inserted into the recess in order to produce the cooling channel which is open at the bottom, and the cooling channel has to be turned out in its desired shape by corresponding axial and radial infeed.
  • a disadvantage of these pistons is that the height of the hook-shaped turning tool determines the height of the cooling channel to be reached and thus the amount of heat to be dissipated from the piston crown due to high wall thicknesses.
  • the recess for introducing the turning tool would have to be enlarged, but this would be accompanied by an undesirable increase in the overall height of the piston.
  • the invention is therefore based on the object of specifying an improved piston concept for a one-piece cooling channel piston, with which inexpensive manufacture of a low piston height is ensured and with which piston deformation due to the action of high gas pressures and temperatures can be effectively counteracted.
  • a cooling channel formed in the piston head has bores that are distributed around its circumference and are oriented toward the piston crown with such spacing from one another that the piston material between the bores forms support ribs for the piston crown.
  • the cooling channel can be shaped closer to the piston crown or combustion bowl and still has excellent dimensional stability with a low piston height.
  • the arrangement of the support ribs results in a type of chamber formation in the cooling channel, i. H. Generation of shaker rooms, which extends the length of time the cooling oil stays and thus improves the heat dissipation of the piston areas to be cooled.
  • the cooling effect can be further improved by an increased number of bores in the areas of the cooling channel in which the focal jets strike the piston crown.
  • Fig. 1 shows a piston according to the invention in cross section, cut in the pin direction
  • FIG. 2 shows a piston according to the invention in a bottom view, cut along the line II in FIG. 1;
  • Fig. 3 shows a piston according to the invention in cross section, cut transversely to
  • FIG. 4 shows a piston according to the invention, cut along the line 1V-IV
  • FIG. 1 shows a piston according to the invention in perspective view.
  • Fig. 6 shows a piston according to the invention, cut along the line IV-IV
  • the one-piece cooling channel piston consists of a forged piston head 1 made of steel or forgeable Al alloy with a combustion bowl 3 in its piston crown 2, an annular wall 4 with ring section 11, a closed cooling channel 7 running around the ring section 11, a piston skirt 9 with the is attached to the piston head 1 attached hubs 12.
  • the piston is produced in accordance with EP 0 799 373 B1, wherein before the cooling channel 7 is closed by means of a cover 13, holes 14 are provided in the cooling channel 7 according to the invention, which are arranged symmetrically distributed on the circumference and in the direction of the piston crown 2, ie parallel to Piston longitudinal axis K are introduced.
  • the depth h ß of the holes 14 is a maximum of a quarter of the total height H of the cooling channel 7, so that an unobstructed cooling oil circuit remains guaranteed. This construction creates shaker spaces for the cooling oil, which increase the cooling effect.
  • the cooling oil inlet 5 and the cooling oil outlet 10 are arranged opposite each other in a cooling duct cover 13, which consists of a two-part spring element.
  • the cooling channel cover 13 closes the cooling channel 7 at its end open towards the piston skirt 9.
  • the material regions designated between the bores 14 form supporting ribs 8, the width of which is determined by the spacing of the bores 14.
  • the bores 14 are spaced apart from one another in the cooling channel 7 in such a way that this corresponds to at least half the diameter of the bores 14, the bore diameters being all identical. It is of course at the discretion of the person skilled in the art to also different bore holes to use a knife, in which case the distance should correspond to half the largest bore diameter in order to counteract piston deformation during engine operation.
  • the bores 14 and thus the support ribs 8 are, as shown in FIG. 4, distributed radially symmetrically over the circumference of the cooling channel 7.
  • the number of bores 14 and thus the distribution of the support ribs 8 can be designed in such a way that a larger number of support ribs 8 is arranged in the pressure-counter pressure direction D or GD than transversely thereto, i. that is, an asymmetrical circumferential distribution in the cooling channel 7 takes place.
  • the distribution of the bores 14 and thus the support ribs 8 in the cooling channel 7, if this is characterized according to the quadrants I-IV formed by the main piston axes KH, can be such that within a quadrant a symmetrical (FIG.
  • asymmetrical or partially symmetrical distribution (Fig. 6) is provided, or the distribution is dependent on the local temperature distribution in the piston crown.
  • the cooling effect can be further improved by an increased number of bores in the areas of the cooling channel 7 in which the combustion jets of the ignited fuel hit the piston crown 2. In this way, the stresses on the piston that occur can be better countered in the event of a load.
  • the bores 14 can be realized by round bores, as shown in FIGS. 4 and 6, or by elongated bores (not shown), which are oriented with their long side in the direction from the center of the piston radially outward to the piston wall. With these respective exemplary embodiments of the bore arrangements it is achieved that they have different distances and thus the material designed as support ribs 8 is enlarged. It is decisive for the spacing of the bores that this corresponds from the bore axis to the bore axis on the circumference at least half of the largest bore diameter used. To further influence the heat dissipation from the combustion bowl 3, the tips of the bores 14 can be round or, as shown in FIG. 1, angled.
  • the axes of the bores 14 can be arranged parallel to the longitudinal piston axis K and / or, ie in combination, at an acute angle thereto, the bores preferably pointing in the direction of the piston crown 2 or combustion bowl 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

L'invention concerne un piston monobloc à conduite de refroidissement pour un moteur à combustion interne. Ce piston comprend une tête de piston (1) en acier forgé, pourvue d'une cavité de combustion (3) dans le fond (2), une paroi annulaire (4) avec une partie segments (11) et une conduite de refroidissement (7) fermée usinée à hauteur de la partie segments (11). Le fût du piston (9) est relié au moyeu (12) accroché à la tête de piston (1). L'invention vise à fabriquer ce piston de manière rentable en lui conférant une grande stabilité de forme et un système de refroidissement amélioré. A cet effet, la conduite de refroidissement (7) comporte des orifices (14) orientés vers le fond de piston (2) et répartis sur sa périphérie avec des espacements tels que le matériau du piston situé entre ces orifices (14) forme des nervures-supports (8) pour le fond de piston (2).
EP03769202A 2002-09-25 2003-09-19 Piston monobloc a conduite de refroidissement pour moteur a combustion interne Expired - Lifetime EP1546536B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10244510 2002-09-25
DE10244510A DE10244510A1 (de) 2002-09-25 2002-09-25 Einteiliger Kühlkanalkolben für einen Verbrennungsmotor
PCT/DE2003/003116 WO2004029443A1 (fr) 2002-09-25 2003-09-19 Piston monobloc a conduite de refroidissement pour moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1546536A1 true EP1546536A1 (fr) 2005-06-29
EP1546536B1 EP1546536B1 (fr) 2009-06-03

Family

ID=31502553

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03769202A Expired - Lifetime EP1546536B1 (fr) 2002-09-25 2003-09-19 Piston monobloc a conduite de refroidissement pour moteur a combustion interne

Country Status (8)

Country Link
US (1) US6698392B1 (fr)
EP (1) EP1546536B1 (fr)
JP (1) JP2006501392A (fr)
KR (1) KR20050057589A (fr)
CN (1) CN100368674C (fr)
BR (1) BR0314798B1 (fr)
DE (2) DE10244510A1 (fr)
WO (1) WO2004029443A1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10301367A1 (de) * 2003-01-16 2004-07-29 Mahle Gmbh Verfahren zum Einbringen von Shakerbohrungen in den Kühlkanal eines einteiligen Kolbens
FR2854089B1 (fr) * 2003-04-23 2006-05-19 Semt Pielstick Procede de fabrication d'un piston, outillage pour la mise en oeuvre de ce procede et piston ainsi obtenu
US7104183B2 (en) * 2004-07-07 2006-09-12 Karl Schmidt Unisia, Inc. One-piece steel piston
DE102004038946A1 (de) 2004-08-11 2006-02-23 Mahle International Gmbh Kühlkanalkolben für einen Verbrennungsmotor mit Wärmerohren
DE102004038945A1 (de) * 2004-08-11 2006-02-23 Mahle International Gmbh Leichtmetallkolben mit Wärmerohren
DE102006027810A1 (de) * 2006-06-16 2007-12-20 Mahle International Gmbh Verfahren zur Herstellung eines einteiligen Kolbens sowie damit hergestellter Kolben
JP5063634B2 (ja) 2009-03-12 2012-10-31 日立オートモティブシステムズ株式会社 内燃機関のピストン
EP2726724B1 (fr) * 2011-06-29 2018-08-22 Federal-Mogul LLC Piston avec élément de support sous la tête
EP2761210B1 (fr) * 2011-09-28 2016-11-30 KS Kolbenschmidt GmbH Piston en acier en deux parties pour moteurs à combustion interne
WO2013179146A1 (fr) 2012-05-30 2013-12-05 Gesenkschmiede Schneider Gmbh Piston forgé en une seule pièce et procédé de fabrication correspondant
JP6401188B2 (ja) 2013-02-18 2018-10-03 フェデラル−モーグル・リミテッド・ライアビリティ・カンパニーＦｅｄｅｒａｌ−Ｍｏｇｕｌ Ｌｌｃ 鋳造金属または粉末金属プロセスによって作られたピストンクラウンを有する複雑な形状のピストンオイルギャラリ
US9334958B2 (en) 2013-02-18 2016-05-10 Federal-Mogul Corporation Complex-shaped forged piston oil galleries
US10787991B2 (en) 2013-02-18 2020-09-29 Tenneco Inc. Complex-shaped forged piston oil galleries
DE102013009155A1 (de) * 2013-05-31 2014-12-04 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE202013102921U1 (de) 2013-07-03 2014-10-06 Gesenkschmiede Schneider Gmbh Zweiteiliger Kühlkanalkolben
US10584659B2 (en) 2015-03-23 2020-03-10 Tenneco Inc Robust, lightweight, low compression height piston and method of construction thereof
US20170058824A1 (en) * 2015-08-28 2017-03-02 Ks Kolbenschmidt Gmbh Piston with low overall height
US10316790B2 (en) * 2016-09-27 2019-06-11 TennecoInc. Piston ring-belt structural reinforcement via additive machining
DE102016225637A1 (de) * 2016-12-20 2018-06-21 Mahle International Gmbh Verfahren zum Herstellen eines einteiligen Kolbens für einen Verbrennungsmotor durch Schmieden
CN109268495B (zh) * 2018-11-19 2020-07-10 滨州渤海活塞有限公司 一种钢活塞与活塞销的组合及其加工工艺
DE102021128792B3 (de) 2021-11-05 2022-07-07 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kolben für einen Hubkolbenmotor, entsprechender Motor und Kraftfahrzeug mit einem solchen

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FR954188A (fr) * 1947-10-02 1949-12-20 Oerlikon Buehrle Ag Piston en métal léger pour moteurs à combustion interne
US3240193A (en) * 1964-07-30 1966-03-15 Gen Motors Corp Piston and piston cooling means
CH594818A5 (fr) * 1975-07-24 1978-01-31 Sulzer Ag
JPS57129237A (en) * 1981-02-03 1982-08-11 Mitsubishi Heavy Ind Ltd Piston of internal combustion engine
DE3444661A1 (de) * 1984-12-07 1986-06-12 Klöckner-Humboldt-Deutz AG, 5000 Köln Fluessigkeitsgekuehlter kolben
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DE3842321A1 (de) * 1988-12-16 1990-06-21 Kolbenschmidt Ag Kolben mit oelkuehlung fuer brennkraftmaschinen
US5144884A (en) * 1989-01-11 1992-09-08 Cummins Engine Company, Inc. Two-part piston assembly device
DE4010062A1 (de) * 1990-03-29 1991-10-02 Mahle Gmbh Gekuehlter tauchkolben fuer verbrennungsmotoren mit voneinander getrenntem kolbenoberteil und kolbenschaft
DE4014703A1 (de) * 1990-05-08 1991-11-14 Mahle Gmbh Gekuehlter tauchkolben fuer verbrennungsmotoren mit voneinander getrenntem kolbenoberteil und kolbenschaft
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Also Published As

Publication number Publication date
CN1685142A (zh) 2005-10-19
EP1546536B1 (fr) 2009-06-03
BR0314798B1 (pt) 2012-10-02
KR20050057589A (ko) 2005-06-16
US6698392B1 (en) 2004-03-02
DE50311581D1 (de) 2009-07-16
DE10244510A1 (de) 2004-04-08
HK1078916A1 (en) 2006-03-24
JP2006501392A (ja) 2006-01-12
WO2004029443A1 (fr) 2004-04-08
BR0314798A (pt) 2005-07-26
CN100368674C (zh) 2008-02-13

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