EP1815123B1 - Piston muni d'un canal de refroidissement pour moteur a combustion interne et procede de production dudit piston - Google Patents

Piston muni d'un canal de refroidissement pour moteur a combustion interne et procede de production dudit piston Download PDF

Info

Publication number
EP1815123B1
EP1815123B1 EP05826464A EP05826464A EP1815123B1 EP 1815123 B1 EP1815123 B1 EP 1815123B1 EP 05826464 A EP05826464 A EP 05826464A EP 05826464 A EP05826464 A EP 05826464A EP 1815123 B1 EP1815123 B1 EP 1815123B1
Authority
EP
European Patent Office
Prior art keywords
piston
cooling duct
salt core
coil
mold
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.)
Ceased
Application number
EP05826464A
Other languages
German (de)
English (en)
Other versions
EP1815123A1 (fr
Inventor
Peter Heidrich
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 EP1815123A1 publication Critical patent/EP1815123A1/fr
Application granted granted Critical
Publication of EP1815123B1 publication Critical patent/EP1815123B1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/105—Salt cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0009—Cylinders, pistons
    • B22D19/0027—Cylinders, pistons pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0072—Casting in, on, or around objects which form part of the product for making objects with integrated channels
    • 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
    • F02F2200/00—Manufacturing
    • F02F2200/06—Casting

Definitions

  • the invention relates to a piston with a cooling channel for an internal combustion engine according to the preamble of claim 1 and a method for producing the piston according to the preamble of the independent claim. 3
  • a piston for an internal combustion engine which has in its radial outer region and near the piston head an annular cooling channel, on the inner wall in the interior of the cooling channel protruding projections are formed, which consist of the same material as the piston.
  • the use of a soluble core is required, which has a very complicated structured surface, which has the disadvantage that the production of the known piston is very complicated and expensive.
  • a simple helix is used, which, in order to attach projections to the inner wall of the cooling channel, will wind around a salt core used to make the cooling channel.
  • Fig. 1 shows a piston 1 made of aluminum in section, which has a molded into its piston crown 2 combustion bowl 3 and on the piston bottom facing away from the underside two opposing shaft elements 4, 4 ', of which pin bosses 5 are held with hub holes 6. In the vicinity of the piston bottom is located on the radial outer side 8 of the piston 1, a ring portion. 7
  • the piston 1 an annular and dashed lines shown cooling channel 9, in the oil inlet opening 10 via a cooling oil 11 is introduced, which expires via an oil drain opening 12 in the direction of arrow 13 from the cooling channel 9 again.
  • a rib element not shown in the figures can be arranged in the direction of the cooling oil jet 11 behind the oil feed opening 10 on the inside of the cooling channel 9 facing the piston crown be substantially cross-sectionally has the shape of a triangle whose tip points downward in the direction of the cooling oil jet 11, and from the legs of the cooling oil bounces 11 and is passed in equal parts in the two cooling channel halves.
  • Dashed lines are drawn in Fig. 1 a arranged in the cooling channel 9, spiral helix 15 made of spring steel, which rests against the wall of the cooling channel 9, and whose purpose is firstly to swirl the cooling oil flowing through the cooling channel 9, whereby at the same time a larger amount of oil comes into contact with the cooling channel wall as in a cooling channel without protrusions, so that the heat dissipation in the piston 1 with the coil 15 according to the invention in the cooling channel 9 is improved over a conventional piston having a cooling passage with a smooth inner surface.
  • the heat dissipation via the cooling oil is improved by the standing with the wall of the cooling channel 9 in thermal contact coil 15 which determines the cooling effect surface of the cooling channel 9, since in this case 15 of the additional heat of the piston. 1 is received and passed over the surface of the cooling oil.
  • the coil 15 can be arranged according to the invention in the cooling channel of a cooled ring carrier.
  • the method of introducing the coil 15 in the cooling channel 9, is based on Fig. 2 explained. Shown is a donut-shaped salt core 16, on the outer surface of the helix 15 is arranged. This salt core 16 is placed in a mold for pistons and cast aluminum, wherein the salt core 16 plays the role of a placeholder for the cooling channel 9. Subsequently, in the finished cast piston blank during the fine machining of the piston 1, the oil inlet and the oil drain opening 10 and 12 are introduced, via which the salt of the salt core 16 is washed out of the cooling channel 9. Remains the coil 15, which is connected to the inner wall of the cooling channel 9 and thereby improves the cooling effect of the guided through the cooling channel 9 oil.
  • the salt core 16 is first prepared by filling in a form corresponding to the salt core 16 salt granules, which is subjected to a pressing pressure which solidifies the salt and thereby forms the salt core 16. On the salt core 16, the helix 15 is then wound up.
  • either the shape for the salt core can have a helical formation directed into the interior of the shape, such that a spiral groove results when the salt core is pressed on its surface, in which the helix 15 comes to lie on the salt core 16 during winding.
  • the salt core 16 can be selected for the pressing of the salt core 16 a Fom with smooth inner surface, so that in this case results in a salt core 16 with a smooth surface.
  • the coil 15 then forms in the cooling channel 9 of the finished cast piston 1 a helical, inwardly directed projection, which serves to improve the cooling effect of the cooling oil.
  • a shape for the salt core 16 is selected, whose inner diameter is equal to the radial diameter r 1 of the slightly prestressed helix 15, which is therefore smaller than the radial diameter of the relaxed helix 15th
  • the slightly biased by twisting about its longitudinal axis coil 15 is inserted and also filled with salt granules, after which the salt core 16 is pressed with inserted coil 15.
  • the salt core 16 is solidified such that the coil 15 remains in the salt core 16 after the pressing process. If, after pouring the piston 1 using this salt core 16, the salt is washed out, the coil 15 adheres under prestress to the inner surface of the cooling channel 9 and thereby contributes to improving the cooling effect of the cooling oil.

Landscapes

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

Claims (6)

  1. Piston (1) pour un moteur à combustion
    - avec un fond de piston (2),
    - avec un canal de refroidissement (9) annulaire, agencé dans la région extérieure radiale du piston (1) et près du fond de piston (2),
    - avec une ouverture d'arrivée d'huile (10) débouchant dans le canal de refroidissement (9), et une ouverture d'évacuation d'huile (12) débouchant dans le canal de refroidissement (9), et
    - avec des saillies agencées sur la paroi intérieure du canal de refroidissement (9) et s'enfonçant à l'intérieur du canal de refroidissement (9),
    caractérisé en ce que les saillies sont formées par une spirale (15) hélicoïdale agencée dans le canal de refroidissement (9) et reliée à la paroi intérieure du canal de refroidissement (9).
  2. Piston (1) selon la revendication 1, caractérisé en ce que la spirale (15) est constituée d'acier à ressort.
  3. Procédé pour la fabrication d'un piston (1) avec un canal de refroidissement (9) pour un moteur à combustion, dans lequel des saillies sont prévues sur la paroi intérieure du canal de refroidissement (9), caractérisé par les étapes de procédé suivantes :
    - fabrication d'un noyau de sel (16) torique, comportant une spirale (15) agencée dans des renfoncements hélicoïdaux de sa surface extérieure,
    - insertion du noyau de sel (16) dans un moule pour le piston (1), à l'endroit où le canal de refroidissement (9) doit être formé,
    - remplissage du moule avec un matériau de moulage pour la fabrication d'une pièce brute de piston avec un canal de refroidissement (9),
    - traitement de finition de la pièce brute de piston, pour la fabrication du piston (1),
    - intégration d'une ouverture d'arrivée d'huile (10) débouchant dans le canal de refroidissement (9), ainsi que d'une ouverture d'évacuation d'huile (12) débouchant dans le canal de refroidissement (9),
    - rinçage du sel du noyau de sel (16), par l'ouverture d'arrivée d'huile (10) et l'ouverture d'évacuation d'huile (12), la spirale (15) demeurant reliée à la paroi intérieure du canal de refroidissement (9) et formant les saillies sur la paroi intérieure du canal de refroidissement (9).
  4. Procédé selon la revendication 4,
    caractérisé par les étapes de procédé suivantes :
    - fabrication du noyau de sel (16) par compression du noyau de sel (16) à l'aide d'un moule, dont la surface intérieure présente une saillie en spirale s'enfonçant à l'intérieur du moule,
    - enroulement de la spirale (15) sur le noyau de sel (16), de manière à ce que la spirale (15) repose dans une rainure formée par la saillie et agencée dans la surface extérieure du noyau de sel (16).
  5. Procédé selon la revendication 4,
    caractérisé par les étapes de procédé suivantes :
    - fabrication du noyau de sel (16) par compression du noyau de sel (16), à l'aide d'un moule avec une surface intérieure lisse,
    - intégration d'une rainure en forme de spirale dans la surface extérieure du noyau d sel (16),
    - enroulement de la spirale (15) sur le noyau de sel (16), de manière à ce que la spirale (15) repose dans la rainure.
  6. Procédé selon la revendication 4,
    caractérisé par les étapes de procédé suivantes :
    - fabrication du noyau de sel (16) par insertion de la spirale (15), précontrainte et présentant donc un diamètre radial r1 réduit, dans un moule, pour le pressage du noyau de sel (16), où le diamètre intérieur du moule est égal au diamètre radial r1 de la spirale (15) précontrainte,
    - remplissage du moule avec des granulés de sel,
    - pressage du noyau de sel avec une spirale (15) intégrée.
EP05826464A 2004-11-25 2005-11-24 Piston muni d'un canal de refroidissement pour moteur a combustion interne et procede de production dudit piston Ceased EP1815123B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410056870 DE102004056870A1 (de) 2004-11-25 2004-11-25 Kolben mit einem Kühlkanal für einen Verbrennungsmotor und Verfahren zur Herstellung des Kolbens
PCT/DE2005/002118 WO2006056185A1 (fr) 2004-11-25 2005-11-24 Piston muni d'un canal de refroidissement pour moteur a combustion interne et procede de production dudit piston

Publications (2)

Publication Number Publication Date
EP1815123A1 EP1815123A1 (fr) 2007-08-08
EP1815123B1 true EP1815123B1 (fr) 2013-01-09

Family

ID=35994678

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05826464A Ceased EP1815123B1 (fr) 2004-11-25 2005-11-24 Piston muni d'un canal de refroidissement pour moteur a combustion interne et procede de production dudit piston

Country Status (3)

Country Link
EP (1) EP1815123B1 (fr)
DE (1) DE102004056870A1 (fr)
WO (1) WO2006056185A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006056012A1 (de) * 2006-11-28 2008-05-29 Ks Kolbenschmidt Gmbh Variabel gestalteter Kühlkanal für einen Kolben
DE102007044105A1 (de) 2007-04-27 2008-10-30 Mahle International Gmbh Gießkern zur Bildung eines Kühlkanals in einem gießtechnisch hergestellten Kolben
KR101371313B1 (ko) 2012-05-03 2014-03-10 자동차부품연구원 엔진피스톤 냉각 갤러리 성형용 솔트코어 및 그 제조방법
DE102012217939A1 (de) * 2012-10-01 2014-04-03 Mahle International Gmbh Verfahren zur Herstellung von Kernen für die gießtechnische Herstellung von Werkstücken

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1454468A (fr) * 1965-08-23 1966-02-11 Perfectionnements aux pistons de moteurs
DE1751342B1 (de) * 1968-05-14 1970-06-18 Alcan Aluminiumwerke Kolben mit im Kolbenkopf angeordnetem,ringfoermigem Kuehlkanal
JPS6072656A (ja) * 1983-09-30 1985-04-24 Nissan Motor Co Ltd ピストンの製造方法
JP2764071B2 (ja) * 1988-10-31 1998-06-11 イズミ工業株式会社 内燃機関用ピストンの製造方法
JP3568136B2 (ja) * 1995-10-02 2004-09-22 株式会社小松製作所 内燃機関用ピストンの冷却装置
DE19810937C1 (de) * 1998-03-13 1999-11-25 Daimler Chrysler Ag Kolben für eine Brennkraftmaschine
GB9909034D0 (en) * 1999-04-19 1999-06-16 Seneca Tech Ltd Piston coolant path
DE19926568A1 (de) * 1999-06-11 2000-12-14 Mahle Gmbh Gekühlter Kolben für Verbrennungsmotoren
DE19930630C1 (de) * 1999-07-02 2000-10-26 Federal Mogul Nuernberg Gmbh Flüssigkeitsgekühlter Kolben
DE10036481A1 (de) * 2000-07-20 2002-02-07 Metallwerke Harzgerode Gmbh Verfahren zur Herstellung von Aluminiumkolben
DE10158607B4 (de) * 2001-11-29 2005-10-06 Federal-Mogul Nürnberg GmbH Flüssigkeitsgekühlter Kolben für Verbrennungskraftmaschine
DE10319230A1 (de) * 2003-04-28 2004-11-18 Ks Kolbenschmidt Gmbh Kolben mit Kühlkanal mit verbesserter Durchsatzleistung

Also Published As

Publication number Publication date
EP1815123A1 (fr) 2007-08-08
WO2006056185A1 (fr) 2006-06-01
DE102004056870A1 (de) 2006-06-01

Similar Documents

Publication Publication Date Title
EP0685643B1 (fr) Pointeau pour une soupape à commande électromagnétique
EP1789673B1 (fr) Soupape d'injection de carburant
DE4112889C2 (de) Verfahren zur Herstellung eines Kolbenkopfes mit Kühlung für einen mehrteiligen, gegliederten Kolben für Verbrennungsmotore, sowie danach hergestellter Kolbenkopf
DE19740026B4 (de) Kraftstoffeinspritzventil
DE4005312C2 (fr)
WO1996020340A1 (fr) Procede de production d'un piston monobloc a canal de refroidissements
DE102008046115B4 (de) Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor
DE102005029417A1 (de) Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor
EP1636474B1 (fr) Procede de production d'un piston monobloc pour un moteur a combustion
DE10321198B4 (de) Kraftstoffeinspritzventil
DE102008028197A1 (de) Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
DE102019211440A1 (de) Motorgehäuse und Verfahren zur Herstellung eines Motorgehäuses
EP1636473B2 (fr) Piston pour un moteur a combustion interne et procede de coulee pour sa production
WO2010003398A1 (fr) Insert pour le piston d'un moteur à combustion interne et piston ou tête de piston équipé de l'insert
DE2100342A1 (de) Verfahren und Vorrichtung zur Herstellung einer gummiartigen ringförmigen Abdichtung
DE19807176A1 (de) Verfahren zur Herstellung eines Kolbens für Brennkraftmaschinen
DE19716702C2 (de) Metallische Gußformanordnung für einen Hubkolben sowie Hubkolben, insbesondere für Brennkraftmaschinen
EP1815123B1 (fr) Piston muni d'un canal de refroidissement pour moteur a combustion interne et procede de production dudit piston
EP1420938B1 (fr) Procede de fabrication d'un boitier tubulaire de clapet d'etranglement et d'un clapet d'etranglement
EP0505773B1 (fr) Piston d'amortisseur fait avec des pièces jointes, de forme différente
DE10015709B4 (de) Kolben mit einem ringförmigen Kühlkanal
DE3231998A1 (de) Kolben mit einlage
DE102004028426B4 (de) Einsatzkern und Verfahren zur Herstellung eines Zylinders für einen Verbrennungsmotor mit dem Einsatzkern
DE69722679T2 (de) Formwerkzeug zur Herstellung eines Zahnrades in Verbundbauweise und Verfahren zur Herstellung eines solchen Werkzeuges
AT3210U1 (de) Kolben für eine brennkraftmaschine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20070615

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HEIDRICH, PETER

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502005013413

Country of ref document: DE

Effective date: 20130307

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20131010

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502005013413

Country of ref document: DE

Effective date: 20131010

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 12

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20181130

Year of fee payment: 14

Ref country code: GB

Payment date: 20181130

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20190131

Year of fee payment: 14

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502005013413

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20191124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191130

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200603

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191124