EP0561817B1 - Piston compose refroidi pour moteurs a combustion interne - Google Patents

Piston compose refroidi pour moteurs a combustion interne Download PDF

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Publication number
EP0561817B1
EP0561817B1 EP91920243A EP91920243A EP0561817B1 EP 0561817 B1 EP0561817 B1 EP 0561817B1 EP 91920243 A EP91920243 A EP 91920243A EP 91920243 A EP91920243 A EP 91920243A EP 0561817 B1 EP0561817 B1 EP 0561817B1
Authority
EP
European Patent Office
Prior art keywords
piston
ring
wall
wall part
component
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.)
Expired - Lifetime
Application number
EP91920243A
Other languages
German (de)
English (en)
Other versions
EP0561817A1 (fr
Inventor
Peter Kemnitz
Gotthard Stuska
Wolfgang Bierkant
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
Priority claimed from DE19904039752 external-priority patent/DE4039752A1/de
Priority claimed from DE19904039754 external-priority patent/DE4039754A1/de
Application filed by Mahle GmbH filed Critical Mahle GmbH
Publication of EP0561817A1 publication Critical patent/EP0561817A1/fr
Application granted granted Critical
Publication of EP0561817B1 publication Critical patent/EP0561817B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02F3/0069—Multi-part pistons the crown and skirt being interconnected by the gudgeon pin
    • 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 multi-part, cooled piston for internal combustion engines according to the preamble of claim 1.
  • Such a piston is known for example from DD 252 638 A.
  • the annular wall parts for covering an annular cooling channel are slotted rings which are inserted in an exciting manner on the inside or outside.
  • the edge of the ring radially distant from the clamping point is axially unsupported in one direction.
  • the invention is primarily concerned with the problem of creating an annular cover wall which is at the same time securely locked radially inside and outside against axial displacement. Furthermore, the cover wall should be simple, non-destructive and securely attachable.
  • the ring-shaped has at least two separate ring segments on its circumference
  • Wall part radially inside and outside each have a circumferential collar with which it engages radially braced radially inside and outside in correspondingly form-fitting recesses on the inner circumference of the outer annular rib of the piston or the hub support lying inside the piston.
  • the radial bracing takes place through an elastic deformation of the collar in the direction perpendicular to the longitudinal axis of the piston. This elastic deformation of the collar in the installed state is very important after the solution according to the invention. Due to the internal and external receptacle, the wall part can be securely fastened to the piston head part in a simple snap lock.
  • the double clamping also enables thin wall thicknesses for the wall part, since it has no freely oscillating areas, as is the case with the annular connecting part according to the above-mentioned document.
  • the annular wall part is divided at least once on its circumference, ie that there are at least two ring segments. Only such a division enables the use of the annular wall part in piston head parts, the hubs have, the outer diameter of which project significantly beyond the inner diameter of the radial inner seal of the cooling channel. In these cases, ring-shaped covers of the type according to DD 252 638 A cannot be installed. Those previously known ring seals are slotted radially only once, so that a spread ring is formed. However, such a ring can only be radially expanded to a small extent if it is to retain its clamping action and should not be damaged in terms of material when it is spread apart.
  • this dimension is not sufficient to be able to mount such a ring. This is a very serious difference in the execution according to the known aforementioned font. This difference is particularly serious because a cover ring divided into, for example, two separate halves could not be attached in a functionally reliable manner according to the document given there.
  • a head part 1 and a shaft are connected in an articulated manner via a piston pin.
  • the shaft and the piston pin are not shown.
  • an outer ring wall 3 containing the grooves for the piston rings extends from the bottom 2 of the piston head.
  • an annular rib 4 connects hubs 5 to the piston crown 2.
  • annular ring Cavity 6 is covered by a wall part designed as a sheet metal ring 7 to form a closed cooling oil chamber.
  • This sheet metal ring 7 has an upwardly curved ring surface 8 with collars 9, 10 formed thereon on the outer and inner circumference.
  • the sheet metal ring 7 is preloaded on the one hand with its outer collar 8 in a corresponding recess 11 on the inner circumference of the ring wall 3 and on the other hand with its inner collar 10 in a corresponding recess 12 on the outer circumference of the annular rib 4 or the hub 5.
  • they In order to be able to elastically deform the collars 9, 10, they have longitudinal slots 13, 14 distributed over the inner and outer circumference, which extend over the entire length of the collars 9, 10.
  • the collars 9, 10 are bent toward one another at their open ends 15, 16.
  • a nose 17 protruding from the collar 9 is formed on the sheet metal ring 7 and protrudes into a corresponding recess 18 provided in the ring wall 3.
  • the sheet metal ring 7 can be made in two parts (parting lines 19) and have recesses 20, 21 for supplying and removing cooling oil.
  • the sheet metal ring 7 should be made of a resilient material, e.g. Spring steel.

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

Pour, dans un piston composé refroidi (1), fermer, de façon étanche et facilement, le bas de la cavité annulaire (9) de la tête (2) et destinée à l'huile de refroidissement, il est prévu une bague en tôle (8), laquelle s'applique d'une part avec son collet (15) dans un évidement (16) de la paroi annulaire (5), et laquelle s'appuie d'autre part par l'intermédiaire d'un étrier de retenue (18), sous précontrainte, contre la douille de l'axe (8).

Claims (5)

  1. Piston composé refroidi pour moteurs à combustion interne, composé d'une partie de tête avec des moyeux, conformés sur cette dernière, pour loger l'axe de piston assemblant le piston avec la bielle, d'une paroi annulaire externe, prolongée sur une première extrémité par le fond de la tête de piston et ouverte sur sa seconde extrémité, pour recevoir une rainure annulaire de piston, au moins, avec un espace creux prolongeant dans le sens radial interne cette paroi annulaire, ouvert sur la seconde extrémité de cette dernière, et entourant les moyeux et/ou leurs éléments supports, prévus vers le fond de la partie de tête, et qui peuvent être notamment une sorte de nervure annulaire, cet espace creux étant fermé par une section de paroi annulaire, à peu près au niveau de la seconde extrémité de cette dernière, pour former un compartiment de passage d'huile de refroidissement, la section de paroi étant serrée par précontrainte entre des supports, prévus sur les moyeux et/ou des éléments de supportage de la partie de tête, d'une part, et dans le sens radial externe sur la paroi annulaire, d'autre part, supports sur lesquels elle repose librement, et avec une tige de piston uniquement assemblée par l'axe de piston avec la partie de tête, caractérisé en ce que la section de paroi (7) est une surface annulaire (8), partagée dans le sens radial, une fois au moins, sur son pourtour, avec des collerettes (9, 10) périphériques, conformées sur les pourtours interne et externe, et fendues dans le sens radial, côtés interne et externe, par des découpes (13), cette section s'engageant sous précontrainte par ses collerettes (9), conformées sur le pourtour externe, dans un évidement (11) prévu sur le pourtour interne de la paroi annulaire (3), d'une part, par sa collerette (10), conformée sur le pourtour interne, dans un évidement (12) des moyeux (5) et/ou leurs éléments supports (4), prévus vers le fond de la partie de tête, d'autre part.
  2. Piston composé suivant la revendication 1, caractérisé en ce que la section de paroi (7) présente comme sécurité anti-rotation un ergot au moins (17), dépassant de la collerette externe (9), et pénétrant dans un évidement (18), prévu sur la paroi annulaire (3).
  3. Piston composé suivant l'une des revendications 1 ou 2, caractérisé en ce que les extrémités (15, 16) des deux collerettes (9, 10) sont pliées vers l'intérieur l'une par rapport à l'autre.
  4. Piston composé suivant l'une quelconque des revendications précédentes, caractérisé en ce que la section de paroi (7) est un anneau de tôle.
  5. Piston composé suivant l'une quelconque des revendications précédentes, caractérisé en ce que la section de paroi (7) se compose de deux parties similaires.
EP91920243A 1990-12-13 1991-11-23 Piston compose refroidi pour moteurs a combustion interne Expired - Lifetime EP0561817B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4039752 1990-12-13
DE4039754 1990-12-13
DE19904039752 DE4039752A1 (de) 1990-12-13 1990-12-13 Mehrteiliger, gekuehlter kolben fuer verbrennungsmotoren
DE19904039754 DE4039754A1 (de) 1990-12-13 1990-12-13 Mehrteiliger, gekuehlter kolben fuer verbrennungsmotoren
PCT/DE1991/000928 WO1992010659A1 (fr) 1990-12-13 1991-11-23 Piston compose refroidi pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP0561817A1 EP0561817A1 (fr) 1993-09-29
EP0561817B1 true EP0561817B1 (fr) 1995-04-12

Family

ID=25899262

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91920243A Expired - Lifetime EP0561817B1 (fr) 1990-12-13 1991-11-23 Piston compose refroidi pour moteurs a combustion interne

Country Status (6)

Country Link
US (1) US5357920A (fr)
EP (1) EP0561817B1 (fr)
JP (1) JP3224389B2 (fr)
BR (1) BR9107164A (fr)
DE (1) DE59105206D1 (fr)
WO (1) WO1992010659A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005037175A1 (de) * 2005-08-06 2007-02-08 Mahle International Gmbh Kolben für einen Verbrennungsmotor sowie Abdeckring für den Kühlkanal eines solchen Kolbens

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4446726A1 (de) * 1994-12-24 1996-06-27 Mahle Gmbh Verfahren zur Herstellung eines einteiligen Kühlkanalkolbens
DE19501416A1 (de) * 1995-01-19 1996-07-25 Kolbenschmidt Ag Geschmiedeter oder gegossener Kolbenkopf eines mehrteiligen Kolbens
US5839352A (en) * 1996-08-07 1998-11-24 Cummins Engine Company, Inc. Articulated piston
DE19747944A1 (de) * 1997-10-30 1999-05-06 Mahle Gmbh Kolben mit zentralem Kühlraum
DE19926568A1 (de) * 1999-06-11 2000-12-14 Mahle Gmbh Gekühlter Kolben für Verbrennungsmotoren
DE19926567A1 (de) * 1999-06-11 2000-12-14 Mahle Gmbh Gekühlter Kolben für Verbrennungsmotoren
US6401595B1 (en) 2000-10-18 2002-06-11 Caterpillar Inc. Piston for an internal combustion engine and method of assembly
US6920860B2 (en) * 2003-10-06 2005-07-26 Mahle Gmbh Cooling channel cover for a one-piece piston of an internal combustion engine
US6820582B1 (en) * 2003-10-06 2004-11-23 Mahle Gmbh Cooling channel cover for a one-piece piston of an internal combustion engine
US6938604B2 (en) * 2003-10-06 2005-09-06 Mahle Gmbh Cooling channel cover for a one-piece piston of an internal combustion engine
US6892690B2 (en) * 2003-10-06 2005-05-17 Mahle Gmbh Cooling channel cover for a one-piece piston of an internal combustion engine
DE10346819A1 (de) * 2003-10-06 2005-04-21 Mahle Gmbh Einteiliger Kolben für einen Verbrennungsmotor
DE10346822A1 (de) * 2003-10-06 2005-04-21 Mahle Gmbh Kolben für einen Verbrennungsmotor
DE102004019011A1 (de) * 2004-04-20 2005-11-17 Mahle Gmbh Kühlkanalabdeckung für einen Kolben eines Verbrennungsmotors
DE102004019010A1 (de) * 2004-04-20 2005-11-17 Mahle Gmbh Kühlkanalabdeckung für einen Kolben eines Verbrennungsmotors
US7162990B1 (en) 2005-12-29 2007-01-16 Mahle Technology, Inc. Two-part piston for an internal combustion engine
US8347842B2 (en) * 2008-02-19 2013-01-08 Federal-Mogul Corporation Coolable piston for internal combustion engine
US7762227B2 (en) * 2008-02-19 2010-07-27 Federal Mogul Corporation Coolable piston for internal combustion engine
DE102010025507A1 (de) * 2010-06-29 2011-12-29 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102010053925A1 (de) * 2010-12-09 2012-06-14 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
DE102011013139A1 (de) * 2011-03-04 2012-09-06 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102011076369A1 (de) * 2011-05-24 2012-11-29 Mahle International Gmbh Untere Abdeckung eines Kühlkanals eines Kolbens
DE102011106381A1 (de) * 2011-07-04 2013-01-10 Mahle International Gmbh Kolben für einen Verbrennungsmotor
WO2013074651A1 (fr) * 2011-11-14 2013-05-23 Mahle International Gmbh Ensemble piston à jupe constituée de plusieurs pièces
US9429099B2 (en) 2011-11-14 2016-08-30 Mahle International Gmbh Piston assembly with multi-piece skirt
DE102012014195A1 (de) 2012-07-18 2014-01-23 Mahle International Gmbh Kolben für einen Verbrennungsmotor
BR112017016320A2 (pt) * 2015-01-30 2018-03-27 Fed Mogul Llc pistão com inserto de refrigeração de galeria de refrigeração e método de construção do mesmo
US11946434B1 (en) * 2023-02-08 2024-04-02 Innio Jenbacher Gmbh & Co Og System and method for enclosing piston cooling gallery

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1900521A (en) 1931-02-06 1933-03-07 James H Price Piston head guard
US4377967A (en) 1981-03-27 1983-03-29 Mack Trucks, Inc. Two-piece piston assembly
DD252638A1 (de) * 1986-09-17 1987-12-23 Ifa Motorenwerke Spritzoelgekuehlter eisenkolben fuer hubkolbenbrennkraftmaschinen
DE3643039A1 (de) * 1986-12-17 1988-06-30 Mahle Gmbh Kuehlbarer tauchkolben fuer verbrennungsmotoren
US4986167A (en) * 1989-05-25 1991-01-22 Caterpillar Inc. Articulated piston with a cooling recess having a preestablished volume therein
BR9005376A (pt) * 1990-10-18 1992-06-16 Metal Leve Sa Embolo bipartido com fechamento postico de galeria e processo para sua obtencao

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005037175A1 (de) * 2005-08-06 2007-02-08 Mahle International Gmbh Kolben für einen Verbrennungsmotor sowie Abdeckring für den Kühlkanal eines solchen Kolbens

Also Published As

Publication number Publication date
BR9107164A (pt) 1994-03-01
JP3224389B2 (ja) 2001-10-29
WO1992010659A1 (fr) 1992-06-25
US5357920A (en) 1994-10-25
JPH06503141A (ja) 1994-04-07
EP0561817A1 (fr) 1993-09-29
DE59105206D1 (de) 1995-05-18

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