EP1583896A1 - Mehrteiliger gekühlter kolben für einen verbrennungsmotor - Google Patents

Mehrteiliger gekühlter kolben für einen verbrennungsmotor

Info

Publication number
EP1583896A1
EP1583896A1 EP03770881A EP03770881A EP1583896A1 EP 1583896 A1 EP1583896 A1 EP 1583896A1 EP 03770881 A EP03770881 A EP 03770881A EP 03770881 A EP03770881 A EP 03770881A EP 1583896 A1 EP1583896 A1 EP 1583896A1
Authority
EP
European Patent Office
Prior art keywords
piston
piston part
threaded
threaded bore
threaded bolt
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
EP03770881A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1583896B1 (de
Inventor
Rainer Scharp
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 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
Application filed by Mahle GmbH filed Critical Mahle GmbH
Publication of EP1583896A1 publication Critical patent/EP1583896A1/de
Application granted granted Critical
Publication of EP1583896B1 publication Critical patent/EP1583896B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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 
    • F02F3/0015—Multi-part pistons
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together

Definitions

  • the invention relates to a multi-part cooled piston for an internal combustion engine according to the preamble of the claim.
  • a piston which is used in a diesel engine and which consists of an upper piston part and a lower piston part.
  • the upper piston part is screwed onto the lower piston part during assembly of the piston via a threaded bolt attached centrally to the upper piston part and a threaded hole machined into the lower piston part.
  • a threaded bolt attached centrally to the upper piston part and a threaded hole machined into the lower piston part.
  • a lock nut To achieve a permanent assembly connection, it is necessary to secure the screw connection using a lock nut.
  • the disadvantage here is that when the piston is assembled, only a short piece of the threaded bolt appears between the pin hubs, making it difficult to screw a lock nut onto it.
  • the invention is based on the problem of designing the upper and lower parts of a multi-part, cooled piston in such a way that the upper piston part can be easily mounted on the lower piston part without the additional use of a lock nut or other securing means.
  • a multi-part cooled piston 1 which consists of an upper piston part 2, which has a combustion bowl 3 and an annular wall 4 with a ring section 5, and a lower piston part 6, which has a box-shaped piston shaft 7 and two pin bosses 8 connected to it
  • 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, the outer cooling channel 10 having at least one inflow opening 12 for introducing cooling oil and via at least one overflow channel 13 with the inner cooling channel 11 is connected, this overflow channel 13 can be designed as a bore.
  • two opposing overflow channels 13 can be provided here.
  • the inner cooling duct 11 has at least one drain hole 14, through which the cooling oil can exit the inner cooling duct 11.
  • the upper piston part 2 is here on the one hand via an annular support surface 15, which is arranged on the side of the upper piston part 2 facing away from the combustion bowl 3, on an upper support surface 16 of an annular support rib 17 of the lower piston part 6 and on the other hand via an on the underside of the ring wall 4 located cross-sectional area 18 mounted on an upper cross-sectional area 19 of an annular support web 20 of the piston lower part 6.
  • the support surfaces 15 and 16 form an inner, flat and horizontally arranged, or roof or plate-shaped support 21 and the cross-sectional surfaces 18 and 19 an outer support 22 which is arranged coaxially and horizontally with respect to the inner support 21 and is also roof-shaped or plate-shaped.
  • the support web 20 is of stepped design so that the upper piston part 2 can be centered via a cylindrical recess 23 machined into the inside of the lower part of the ring wall 4 in that when the upper and lower parts of the piston are assembled, the inner wall of the cylindrical recess 23 with the cylindrical one
  • the end face 24 of the support web 20 comes into contact, it being necessary for the inside diameter of the cylindrical recess 23 to be larger than the outside diameter of the cylindrical end face 24 of the support web 20 by a tolerance measure such that problem-free mounting of the upper part 2 on the lower part 6 is ensured ,
  • the upper piston part 2 On the side facing away from the combustion bowl 3, the upper piston part 2 has a bolt 26 arranged centrally and coaxially to the longitudinal axis 25 of the piston 1, the end 27 of which is provided with a thread 28.
  • the area 31 between the annular support rib 17 of the lower piston part 6, which, together with the upper piston part 2, delimits the inner cooling channel 11, is relatively thin-walled and is provided in its center with a bore 29 arranged coaxially with the longitudinal axis 25 of the piston 1, which opens up the thread 28 of the bolt 26 has a suitable internal thread 30.
  • both the contact surfaces 15 and 16 of the inner support 21 and the cross-sectional areas 18 and 19 of the outer support 22 are pressed against one another, as a result of which the inner and the outer cooling channels 10 and 11 are sealed.
  • the strength of the assembly of the upper and lower parts of the piston is increased to such an extent that an additional nut or lock nut is not required to achieve a permanent assembly connection. Tests have shown that sufficient preloading of the two parts of the piston is ensured under all conceivable operating conditions.
  • the upper piston part 2 can consist of an oxidation-resistant and / or heat-resistant material. Steels with chrome contents> 4% from the material groups of the chemically resistant steels are typically used. DIN EN 10027-2 (steel group numbers 1.4x xx), such as stainless, high-temperature or heat-resistant steels, as well as from the material group of alloyed tool steels, such as alloyed hot-work steels.
  • the lower piston part 6 consists of a precipitation hardening ferritic-pearlitic steel or tempering steel, the steel grades 38MnVS6 or 42CrMo4 being typically used (according to the German steel-iron material sheet 101).
EP03770881A 2002-12-06 2003-09-24 Mehrteiliger gekühlter kolben für einen verbrennungsmotor Expired - Fee Related EP1583896B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10257022A DE10257022A1 (de) 2002-12-06 2002-12-06 Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
DE10257022 2002-12-06
PCT/DE2003/003170 WO2004053319A1 (de) 2002-12-06 2003-09-24 Mehrteiliger gekühlter kolben für einen verbrennungsmotor

Publications (2)

Publication Number Publication Date
EP1583896A1 true EP1583896A1 (de) 2005-10-12
EP1583896B1 EP1583896B1 (de) 2006-05-17

Family

ID=32115585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03770881A Expired - Fee Related EP1583896B1 (de) 2002-12-06 2003-09-24 Mehrteiliger gekühlter kolben für einen verbrennungsmotor

Country Status (10)

Country Link
US (1) US6729291B1 (zh)
EP (1) EP1583896B1 (zh)
JP (1) JP4414894B2 (zh)
KR (1) KR101067577B1 (zh)
CN (1) CN100339584C (zh)
BR (2) BR0310142B1 (zh)
DE (2) DE10257022A1 (zh)
HK (1) HK1084169A1 (zh)
RU (1) RU2313679C2 (zh)
WO (1) WO2004053319A1 (zh)

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GB2365507B (en) 2000-08-02 2004-09-15 Federal Mogul Technology Ltd Engine piston and manufacture
DE10337961A1 (de) * 2003-08-19 2005-04-21 Mahle Gmbh Mehrteiliger Kolben für einen Verbrennungsmotor
DE102004061778A1 (de) * 2004-09-29 2006-04-06 Ks Kolbenschmidt Gmbh Einfach-Reibschweißung
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
DE102005042003A1 (de) * 2005-09-05 2007-03-08 Mahle International Gmbh Gebauter, flüssigkeitsgekühlter Kolben
DE502006008456D1 (de) * 2005-12-17 2011-01-13 Mahle Int Gmbh Zweiteiliger kolben für einen verbrennungsmotor
DE102005061899A1 (de) * 2005-12-23 2007-06-28 Mahle International Gmbh Mehrteiliger Kolben für eine Verbrennungsmotor
DE102006002949A1 (de) * 2006-01-21 2007-08-02 Ks Kolbenschmidt Gmbh Kühlkanalkolben für eine Brennkraftmaschine
DE102006013906A1 (de) * 2006-03-25 2007-10-18 Mahle International Gmbh Mehrteiliger Kolben für einen Verbrennungsmotor
DE102006027354A1 (de) * 2006-06-13 2007-12-20 Mahle International Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
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US7533601B2 (en) 2006-12-12 2009-05-19 Mahle Technology, Inc. Multi-part piston for a combustion engine
DE102007060472A1 (de) * 2007-12-14 2009-06-18 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
DE102007061601A1 (de) * 2007-12-20 2009-06-25 Mahle International Gmbh Kolben für einen Verbrennungsmotor sowie Verfahren zu seiner Herstellung
EA016702B1 (ru) * 2008-10-24 2012-06-29 Государственное Научное Учреждение "Физико-Технический Институт Национальной Академии Наук Беларуси" Способ изготовления охлаждающего канала поршня двигателя внутреннего сгорания
DE102008056203A1 (de) * 2008-11-06 2010-05-12 Mahle International Gmbh Mehrteiliger Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
CN101761384B (zh) * 2008-11-10 2013-03-06 扬动股份有限公司 发动机活塞连杆结构
DE102008058190A1 (de) 2008-11-20 2010-05-27 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
DE102009015820A1 (de) * 2009-04-01 2010-10-07 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
JP2013501193A (ja) * 2009-08-06 2013-01-10 フェデラル−モーグル コーポレイション 低熱伝導度ピストンおよびその構築方法
US8327537B2 (en) * 2009-12-23 2012-12-11 Federal Mogul Corporation Reinforced dual gallery piston and method of construction
US9334957B2 (en) 2009-12-23 2016-05-10 Federal-Mogul Corporation Piston having dual gallery, method of construction, and piston body portions thereof
DE102010053925A1 (de) * 2010-12-09 2012-06-14 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
US10753310B2 (en) * 2012-02-10 2020-08-25 Tenneco Inc. Piston with enhanced cooling gallery
CN102996280B (zh) * 2012-06-13 2014-11-26 北京理工大学 一种基于空腔隔热的钛合金活塞及其设计方法
DE102012014194A1 (de) * 2012-07-18 2014-01-23 Mahle International Gmbh Verfahren zur Herstellung eines Kolbens
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
US9291119B2 (en) * 2013-03-14 2016-03-22 Mahle International Gmbh Piston assembly with preloaded support surfaces
RU2540194C1 (ru) * 2013-09-25 2015-02-10 Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) Поршень форсированного дизельного двигателя
CN104832315A (zh) * 2014-07-21 2015-08-12 北汽福田汽车股份有限公司 发动机活塞和具有其的发动机
CN104458498A (zh) * 2014-11-25 2015-03-25 浙江大学 一种可拆装油腔内芯的内冷活塞
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
JP6131977B2 (ja) * 2015-03-24 2017-05-24 マツダ株式会社 金属製基材上に樹脂含有皮膜を有するワークの加工方法
US20180355818A1 (en) * 2015-10-08 2018-12-13 Ks Kolbenschmidt Gmbh Piston Having Outer Thread
US10294887B2 (en) 2015-11-18 2019-05-21 Tenneco Inc. Piston providing for reduced heat loss using cooling media
CN109312688A (zh) 2016-05-04 2019-02-05 Ks科尔本施密特有限公司 活塞
RU2657401C1 (ru) * 2017-03-28 2018-06-13 Евгений Куртович Гауэр Тепловой двигатель
CN107755699A (zh) * 2017-11-03 2018-03-06 湖南江滨机器（集团）有限责任公司 一种钢活塞的制作方法

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Also Published As

Publication number Publication date
BR0310142B1 (pt) 2013-02-19
JP4414894B2 (ja) 2010-02-10
KR101067577B1 (ko) 2011-09-27
BR0317030A (pt) 2005-10-25
RU2005121255A (ru) 2006-06-10
KR20050084180A (ko) 2005-08-26
WO2004053319A1 (de) 2004-06-24
DE10257022A1 (de) 2004-06-17
CN100339584C (zh) 2007-09-26
JP2006509152A (ja) 2006-03-16
HK1084169A1 (en) 2006-07-21
CN1714232A (zh) 2005-12-28
RU2313679C2 (ru) 2007-12-27
EP1583896B1 (de) 2006-05-17
US6729291B1 (en) 2004-05-04
DE50303408D1 (de) 2006-06-22

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