EP2027381B1 - Mehrteiliger gekühlter kolben für einen verbrennungsmotor - Google Patents

Mehrteiliger gekühlter kolben für einen verbrennungsmotor Download PDF

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Publication number
EP2027381B1
EP2027381B1 EP07785519A EP07785519A EP2027381B1 EP 2027381 B1 EP2027381 B1 EP 2027381B1 EP 07785519 A EP07785519 A EP 07785519A EP 07785519 A EP07785519 A EP 07785519A EP 2027381 B1 EP2027381 B1 EP 2027381B1
Authority
EP
European Patent Office
Prior art keywords
piston
cooling channel
upper region
threaded bolt
combustion engine
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 - Fee Related
Application number
EP07785519A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2027381A2 (de
Inventor
Rainer Scharp
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 EP2027381A2 publication Critical patent/EP2027381A2/de
Application granted granted Critical
Publication of EP2027381B1 publication Critical patent/EP2027381B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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 
    • F02F3/16—Pistons  having cooling means
    • 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 multi-part piston for an internal combustion engine according to the preamble of claim.
  • a multi-part cooled piston for an internal combustion engine which consists of a piston upper part and a piston lower part.
  • a threaded bolt is arranged, and in the upper region of the piston lower part a threaded bore is introduced, so that the two piston parts on the threaded bolt and the threaded bore are screwed together.
  • the upper portion of the piston lower part is in this case formed so thin-walled that it deforms plate spring-like when screwing piston upper part and piston lower part, so that on the threaded bolt and the threaded bore a bias is applied, which consolidates and secures the screw connection formed thereby.
  • the disadvantage here is that in the deformation of the upper portion of the piston lower part near the threaded hole voltage-related cracks can occur, which solve the screw and damage to the piston and thus the engine, in which the piston is installed, can lead.
  • the invention is based on the problem to avoid the mentioned disadvantage of the prior art.
  • the problem is solved with the standing in the characterizing part of claim characteristics.
  • a multi-part cooled piston 1 which consists of a piston upper part 2 with a combustion bowl 3 and with an annular wall 4 with ring portion 5 and a piston base 6, a box-shaped piston shaft 7 and two associated pin bosses 8, each with a pin bore 9 has for receiving a piston pin, not shown in the figure.
  • the upper piston part 2 and the lower piston part 6 delimit an outer annular cooling channel 10 and an inner cooling channel 11 arranged concentrically therewith, wherein the outer cooling channel 10 has at least one inflow opening 12 for introducing cooling oil and is connected to the inner cooling channel 11 via at least one overflow channel 13 ,
  • the overflow channel 13 may be formed as a bore.
  • the inner cooling channel 11 has at least one drain hole 14, via which the cooling oil can escape from the inner cooling channel 11.
  • the upper piston part 2 and the lower piston part 6 can be made of steel.
  • the piston upper part 2 supports, on the one hand, an annular support surface 15 arranged on its underside on an upper support surface 16 of an annular support rib 17 of the piston lower part 6 and, on the other hand, a cross-sectional surface 18 located on the underside of the annular wall 4 on an upper cross-sectional surface 19 of an annular one Supporting web 20 of the piston lower part 6.
  • the support surfaces 15 and 16 form an inner, planar and horizontally arranged, or roof or plate-shaped support 21 and the cross-sectional surfaces 18 and 19 to the inner support 21 coaxially arranged and horizontally lying, or also roof. or dish-shaped outer pad 22.
  • the support web 20 is viewed in section as a radially inwardly and upwardly directed step, so that the piston upper part 2 via a in the inside the lower end of the annular wall 4 introduced and complementary to the support web 20 shaped recess 23 can be centered relative to the piston lower part 6 by the recess 23 of the annular wall 4 of the piston upper part 2 is pushed onto the support web 20 of the piston lower part 6.
  • the inner diameter of the recess 23 is larger by a certain tolerance than the outer diameter of the cylindrical end face 24 of the support web 20, so that a trouble-free mounting of the piston upper part 2 is ensured on the piston lower part 6.
  • the underside of the upper piston part 2 has a centrally located and coaxial with the piston axis 25 blind hole 26 with internal thread 28.
  • the region 31 between the annular support rib 17 of the piston lower part 6, which defines the inner cooling channel 11 together with the piston upper part 2, is formed relatively thin-walled and is provided in its center with a coaxial with the piston axis 25 and upwardly directed threaded bolt 29, the upper End 27 has an external thread 30 which fits into the internal thread 28 of the blind hole 26.
  • the upper piston part 2 is centered over the recess 23 and the support web 20 relative to the lower piston part 6 and then rotated about the piston axis 25, wherein the blind hole 26 is screwed onto the threaded bolt 29.
  • the elasticity of the relatively thin-walled region 31 causes it to deform like a disk spring when the piston top and bottom are screwed together, ie, the inner center of the region 31 provided with the threaded bolt 29 bulges in the direction of the piston upper part 2.
  • the tensile stress exerted on the unthreaded shank 32 of the threaded bolt 29 during assembly leads to an elastic extension of the shank 29.
EP07785519A 2006-06-13 2007-06-08 Mehrteiliger gekühlter kolben für einen verbrennungsmotor Expired - Fee Related EP2027381B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006027354A DE102006027354A1 (de) 2006-06-13 2006-06-13 Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
PCT/DE2007/001015 WO2007143969A2 (de) 2006-06-13 2007-06-08 Mehrteiliger gekühlter kolben für einen verbrennungsmotor

Publications (2)

Publication Number Publication Date
EP2027381A2 EP2027381A2 (de) 2009-02-25
EP2027381B1 true EP2027381B1 (de) 2010-08-18

Family

ID=38626907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07785519A Expired - Fee Related EP2027381B1 (de) 2006-06-13 2007-06-08 Mehrteiliger gekühlter kolben für einen verbrennungsmotor

Country Status (7)

Country Link
US (1) US8201537B2 (zh)
EP (1) EP2027381B1 (zh)
JP (1) JP2009540201A (zh)
KR (1) KR20090018628A (zh)
CN (1) CN101466937B (zh)
DE (2) DE102006027354A1 (zh)
WO (1) WO2007143969A2 (zh)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008045456A1 (de) * 2008-09-02 2010-03-04 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102009027148B4 (de) 2009-06-24 2015-02-12 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor mit Kühlkanalsystem
CN102667127B (zh) * 2009-11-25 2014-05-28 丰田自动车株式会社 内燃机用活塞以及内燃机
DE102010009891A1 (de) * 2010-03-02 2011-09-08 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102011013139A1 (de) * 2011-03-04 2012-09-06 Mahle International Gmbh Kolben für einen Verbrennungsmotor
US8973484B2 (en) * 2011-07-01 2015-03-10 Mahle Industries Inc. Piston with cooling gallery
BR112015001186A2 (pt) * 2012-07-20 2017-07-04 Federal Mogul Corp pistão com passagem de esfriamento de óleo e método de sua construção
CN102943717A (zh) * 2012-12-06 2013-02-27 湖南江滨机器（集团）有限责任公司 钢顶铝裙组合活塞
KR101383121B1 (ko) * 2013-07-01 2014-04-09 삼영기계주식회사 피스톤 조립체
CN105986923B (zh) * 2015-02-09 2019-02-19 强哲菲 一种双油腔钢活塞及其加工方法
US10294887B2 (en) * 2015-11-18 2019-05-21 Tenneco Inc. Piston providing for reduced heat loss using cooling media
CN113202654A (zh) * 2021-05-18 2021-08-03 大昌汽车部件(苏州)有限公司 一种组合式发动机活塞及其锻造工艺

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1903219A (en) * 1928-08-17 1933-03-28 Hugh G Landis Electric heater
US2024269A (en) * 1933-06-20 1935-12-17 Bernard Renee Piston
US2198771A (en) * 1937-04-19 1940-04-30 Gen Motors Corp Welded two-piece light alloy piston
US2398577A (en) * 1944-06-01 1946-04-16 George V Bratzel Piston for internal-combustion engines
DE2914456A1 (de) 1979-04-10 1980-10-23 Schmidt Gmbh Karl Gebauter kolben fuer brennkraftmaschinen
WO1983002300A1 (en) 1981-12-28 1983-07-07 Alco Power Inc Prestressed composite piston
DE3719469A1 (de) 1987-06-11 1988-12-29 Mahle Gmbh Gebauter fluessigkeitsgekuehlter kolben fuer verbrennungsmotoren
DE4131275C2 (de) * 1991-09-20 1998-04-09 Mahle Gmbh Gebauter flüssigkeitsgekühlter Kolben
FI102559B1 (fi) * 1995-03-09 1998-12-31 Waertsilae Nsd Oy Ab Polttomoottorin mäntäyksikkö
DE19846496A1 (de) * 1998-10-09 2000-04-13 Mahle Gmbh Kolben für einen Verbrennungsmotor
DE10257022A1 (de) 2002-12-06 2004-06-17 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
DE102004027974A1 (de) * 2004-06-08 2005-12-29 Mahle Gmbh Gebauter Kolben und Verfahren zur Vermeidung von Beschädigungen in Kontakt zueinander stehender Flächen des Oberteiles und des Unterteiles des Kolbens
DE102004029877A1 (de) * 2004-06-19 2006-01-05 Mahle Gmbh Gebauter Kolben für einen Verbrennungsmotor
DE102004030218A1 (de) * 2004-06-22 2006-01-19 Mahle Gmbh Gebauter Kolben für einen Verbrennungsmotor

Also Published As

Publication number Publication date
DE102006027354A1 (de) 2007-12-20
EP2027381A2 (de) 2009-02-25
US8201537B2 (en) 2012-06-19
CN101466937B (zh) 2011-07-06
US20110155080A1 (en) 2011-06-30
CN101466937A (zh) 2009-06-24
KR20090018628A (ko) 2009-02-20
WO2007143969A2 (de) 2007-12-21
WO2007143969A3 (de) 2008-02-28
JP2009540201A (ja) 2009-11-19
DE502007004798D1 (de) 2010-09-30

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