EP1922478B1 - Piston en plusieurs parties, refroidi par liquide - Google Patents

Piston en plusieurs parties, refroidi par liquide Download PDF

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Publication number
EP1922478B1
EP1922478B1 EP06775919A EP06775919A EP1922478B1 EP 1922478 B1 EP1922478 B1 EP 1922478B1 EP 06775919 A EP06775919 A EP 06775919A EP 06775919 A EP06775919 A EP 06775919A EP 1922478 B1 EP1922478 B1 EP 1922478B1
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EP
European Patent Office
Prior art keywords
piston
cooling channel
radially
contact surface
channel
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.)
Active
Application number
EP06775919A
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German (de)
English (en)
Other versions
EP1922478A1 (fr
Inventor
Dieter Messmer
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
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Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP1922478A1 publication Critical patent/EP1922478A1/fr
Application granted granted Critical
Publication of EP1922478B1 publication Critical patent/EP1922478B1/fr
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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
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together
    • 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 
    • 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 built, liquid-cooled piston according to the preamble of claim.
  • the publication DE 41 31 275 A1 is a built, liquid-cooled piston known, which consists of a piston head forming the upper part and a piston skirt having the lower part.
  • the upper part and the lower part are connected to each other by a Dehnschraube, wherein between the head of the expansion screw and a support of the expansion screw serving collar of the lower part a sleeve is arranged, which has radial bores, can flow through the accumulated in an inner cooling oil cooling oil.
  • the expansion screw has a relatively large footprint, which prevents a reduction in the compression height and thus a reduction in the axial dimensions of the piston.
  • the unimpeded removal of cooling oil from the inner cooling space requires an additional sleeve with radial bores, which makes the assembly of the piston known from the prior art rather complicated.
  • US 3 465 651 A discloses a built-in, liquid-cooled piston having a top having a piston crown, an annular wall, a crown land and a ring portion, and a base having bolt bosses with bolt holes and shank members.
  • Upper part and lower part are connected to each other via a radially outer and a radially inner annular bearing surface, wherein between the radially outer and the radially inner bearing surface an outer cooling channel and radially inside the inner bearing surface is an inner cooling channel.
  • the outer cooling channel is connected by an oil supply to the piston interior and by an overflow channel with the inner cooling channel. The return of the coolant from the inner cooling channel into the piston interior takes place through a plurality of channels, which are formed in the lower part.
  • the upper part has on the side facing away from the piston bottom along the piston axis a bolt with an external thread, wherein the upper part and the lower part are screwed together by screwing a hex nut on the external thread of the bolt.
  • the disadvantage here is the complicated structure, in particular of the lower part, in which a plurality of channels for coolant must be formed. For this purpose, suitable casting cores or several subsequent processing steps are required.
  • FIGS. 1 and 2 is a two-piece, constructed, liquid-cooled piston 1, which consists of a top part 2 and a lower part 3.
  • the upper part 2 and the lower part 3 may be made of aluminum, steel or cast iron with nodular graphite (GGG cast iron according to DIN 1693).
  • GGG cast iron nodular graphite
  • an annular wall 5 is formed, the outer surface piston bottom side forms a top land 6, what the shaft side a ring section 7 connects with annular grooves for receiving piston rings, not shown in the figures.
  • pin bosses 8, 8 'each having a pin bore 9, 9' are arranged at the bottom of the lower part 3 facing away from the piston head 4.
  • the radially outer end surfaces 29, 29 'of the pin bosses 8, 8' relative to the annular wall 5 are offset radially inward.
  • the pin bosses 8, 8 ' are connected to each other via shaft elements 10, 10'.
  • the upper part 2 and the lower part 3 of the piston 1 are connected via a radially inner, annular support 11 and a concentric thereto, radially outer, annular support 12 with each other.
  • the radially outer support 12 is formed by the piston bottom side end face of a radially outer circumferential support web 14, the piston crown side partly to the shaft members 10, 10 '( Fig. 1 ) and partly to the pin bosses 8, 8 '( Fig. 2 ) is formed.
  • the support 12 has the shape of a radially inward and axially directed in the direction of the piston head 4 stage 30.
  • the upper part 2 and the lower part 3 can thereby be coaxially aligned with each other, that the inside of the lower end face of the annular wall 5 has a cylindrical recess 31 whose inner shape is complementary to the shape of the step 30 of the outer support 12, so Assembly of the piston 1, the step 30 is inserted into the recess 31, whereby the coaxial alignment of the upper and lower part of the piston 1 is achieved.
  • the inner support 11 is of the annular, piston bottom side end of a radially encircling within the support bar 14 and as the support web 14 partly to the shaft members 10, 10 '( Fig. 1 ) and partly to the pin bosses 8, 8 '( Fig. 2 ) formed submanding foot 15.
  • the upper part 2 of the piston 1 is located on a side facing away from the piston bottom Anformung 32, wherein the piston bottom facing away from end of Anformung 32 rests on the inner support 11 and at least approximately the same radial diameter as the inner support 11.
  • an outer cooling channel 13 is arranged in the piston bottom side edge region of the piston 1 is formed, the radially outer boundary partly of the annular wall 5 and partly of the support web 14, the radially inner boundary of the sub-base 15, the axially upper boundary of the piston head 4 and the axially lower boundary of the lower part 3 of the piston 1 are formed. Cooling oil is introduced into the outer cooling channel 13 via at least one oil feed channel 16 opening into the piston interior 28.
  • the piston 1 has a further, coaxially to the piston axis 17 arranged, annular, inner cooling channel 18, which has a smaller radial diameter than the outer cooling channel 13, and which, viewed in the radial direction, is disposed within the outer cooling channel 13.
  • Anformung 33 axially downwardly from a further explained below in more detail hex nut 19 and radially inwardly bounded by a cylindrically shaped bolt 20 which is arranged on the underside of the piston head 4 coaxial with the piston axis 17.
  • the outer cooling channel 13 is connected to the inner cooling channel 18.
  • the outer cooling channel 13 and the inner cooling channel 18 may also be connected to each other via introduced into the lower part of the foot 15 holes.
  • the lateral surface of the bolt 20 has a piston bottom facing away end portion with an external thread 23 (FIG. Fig. 2 ), which corresponds to the internal thread 34 of the hex nut 19, so that the hex nut 19 can be screwed onto the external thread 23 of the bolt 20.
  • the hexagonal nut 19 consists of a threaded portion 24 with the internal thread 34 and a radially outer cross-section hexagonal outer surface and a piston crown side integrally formed thereon collar 25, in the present embodiment, two radially arranged and opposing holes, or milling 26, 27, the connect the inner cooling channel 18 with the piston interior 28. If the hexagonal nut 19 is screwed tight, the piston-bottom-side end face of the collar 25 bears against the end face of the molding 33 facing away from the piston crown.

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 (1)

  1. Piston (1) en plusieurs parties, refroidi par un liquide,
    - comportant une partie supérieure (2) qui comprend une tête de piston (4) et une paroi annulaire (5) pourvue d'un segment de feu (5) et d'un ensemble annulaire (7), et
    - comportant une partie inférieure (3) qui comprend des bossages d'axe (8, 8') pourvus d'alésages d'axe (9, 9') et d'éléments de tige (10, 10'),
    - la partie supérieure (2) et la partie inférieure (3) étant en liaison l'une avec l'autre par l'intermédiaire d'un appui annulaire radialement extérieur (12) et d'un appui annulaire radialement intérieur (11),
    - un canal de refroidissement (13) extérieur étant disposé entre l'appui extérieur (12) et l'appui intérieur (11), et un canal de refroidissement (18) intérieur étant disposé radialement à l'intérieur de l'appui intérieur (11),
    - l'espace intérieur (28) du piston étant relié au canal de refroidissement (13) extérieur par l'intermédiaire d'au moins un canal d'alimentation d'huile (16), et le canal de refroidissement (13) extérieur étant relié au canal de refroidissement (18) intérieur par l'intermédiaire d'au moins un canal de trop-plein (22, 22'),
    - dans lequel un boulon (20) pourvu d'un filetage extérieur (23) est agencé sur le côté inférieur de la tête de piston (4), détourné de la tête de piston, coaxialement à l'axe de piston (17), et
    - dans lequel la partie supérieure (2) et la partie inférieure (3) du piston (1) sont assemblées l'une avec l'autre par vissage au moyen d'un écrou hexagonal (19) apte à se visser sur le filetage extérieur (23) du boulon (20),
    caractérisé en ce que
    l'écrou hexagonal (19) comprend du côté tête de piston une collerette (25) pourvue d'au moins un alésage ou fraisage (26, 27) disposé radialement qui relie le canal de refroidissement (18) intérieur à l'espace intérieur (28) du piston.
EP06775919A 2005-09-05 2006-09-02 Piston en plusieurs parties, refroidi par liquide Active EP1922478B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005042003A DE102005042003A1 (de) 2005-09-05 2005-09-05 Gebauter, flüssigkeitsgekühlter Kolben
PCT/DE2006/001548 WO2007028364A1 (fr) 2005-09-05 2006-09-02 Piston en plusieurs parties, refroidi par liquide

Publications (2)

Publication Number Publication Date
EP1922478A1 EP1922478A1 (fr) 2008-05-21
EP1922478B1 true EP1922478B1 (fr) 2013-03-27

Family

ID=37460180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06775919A Active EP1922478B1 (fr) 2005-09-05 2006-09-02 Piston en plusieurs parties, refroidi par liquide

Country Status (7)

Country Link
US (1) US7934482B2 (fr)
EP (1) EP1922478B1 (fr)
JP (1) JP4838848B2 (fr)
KR (1) KR101279843B1 (fr)
CN (1) CN100572784C (fr)
DE (1) DE102005042003A1 (fr)
WO (1) WO2007028364A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007060472A1 (de) * 2007-12-14 2009-06-18 Mahle International Gmbh Zweiteiliger 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
DE102008055909A1 (de) * 2008-11-05 2010-05-06 Mahle International Gmbh Mehrteiliger Kolben für einen Verbrennungsmotor
US8371261B2 (en) * 2008-11-05 2013-02-12 Mahle International Gmbh Multi-part piston for an internal combustion engine and method for its production
US8161934B2 (en) 2008-11-05 2012-04-24 Mahle International Gmbh Multi-part piston for an internal combustion engine and method for its production
DE102008056203A1 (de) * 2008-11-06 2010-05-12 Mahle International Gmbh Mehrteiliger Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
EP2543849A1 (fr) 2010-03-02 2013-01-09 Toyota Jidosha Kabushiki Kaisha Dispositif de commande de pression de combustion
US9291119B2 (en) * 2013-03-14 2016-03-22 Mahle International Gmbh Piston assembly with preloaded support surfaces
US10449621B2 (en) * 2014-05-01 2019-10-22 Mahle International Gmbh Magnetic arc welded piston assembly
DE102016001926A1 (de) * 2016-02-18 2017-08-24 Man Truck & Bus Ag Kolben für eine Hubkolben-Verbrennungskraftmaschine
DE102021128787A1 (de) 2021-11-05 2023-05-11 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kolben für einen Verbrennungsmotor
DE102021128790A1 (de) 2021-11-05 2023-05-11 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kolbenanordnung für einen Verbrennungsmotor
CN114645798B (zh) * 2022-03-14 2023-02-28 北京理工大学 一种活塞销孔衬套结构

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1037133A (fr) * 1951-05-16 1953-09-15 Perfectionnements aux pistons de moteurs
FR1429327A (fr) 1964-12-29 1966-02-25 Hispano Suiza Sa Perfectionnements apportés aux pistons pour moteurs à combustion interne
US3465651A (en) * 1968-02-13 1969-09-09 Alco Products Inc Composite pistons
DE2914456A1 (de) * 1979-04-10 1980-10-23 Schmidt Gmbh Karl Gebauter kolben fuer brennkraftmaschinen
DE2936630C2 (de) * 1979-09-11 1985-05-09 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen Kolben für eine Brennkraftmaschine
DE3719469A1 (de) * 1987-06-11 1988-12-29 Mahle Gmbh Gebauter fluessigkeitsgekuehlter kolben fuer verbrennungsmotoren
IT1240526B (it) * 1990-07-31 1993-12-17 Borgo Nova S.P.A. Perfezionamento relativo a pistoni, in genere.
DE4131275C2 (de) * 1991-09-20 1998-04-09 Mahle Gmbh Gebauter flüssigkeitsgekühlter Kolben
CA2086133A1 (fr) * 1992-12-23 1994-06-24 Rex Edgell Piston pour moteur diesel alco, de serie 251
KR19990031997U (ko) * 1997-12-31 1999-07-26 정몽규 피스톤 냉각 구조
DE19846496A1 (de) * 1998-10-09 2000-04-13 Mahle Gmbh Kolben für einen Verbrennungsmotor
DE10022035A1 (de) * 2000-05-05 2001-11-08 Mahle Gmbh Verbrennungsmotor mit einem gebauten Kolben
DE10257022A1 (de) * 2002-12-06 2004-06-17 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
DE102004057624A1 (de) * 2004-11-30 2006-06-01 Mahle International Gmbh Mehrteiliger, gekühlter Kolben für einen Verbrennungsmotor
DE102005041409A1 (de) * 2005-09-01 2007-03-08 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor

Also Published As

Publication number Publication date
US20090139481A1 (en) 2009-06-04
DE102005042003A1 (de) 2007-03-08
EP1922478A1 (fr) 2008-05-21
CN101258319A (zh) 2008-09-03
JP4838848B2 (ja) 2011-12-14
KR20080043360A (ko) 2008-05-16
WO2007028364A1 (fr) 2007-03-15
CN100572784C (zh) 2009-12-23
US7934482B2 (en) 2011-05-03
JP2009507171A (ja) 2009-02-19
KR101279843B1 (ko) 2013-06-28

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