EP2173996A1 - Piston assemblé - Google Patents

Piston assemblé

Info

Publication number
EP2173996A1
EP2173996A1 EP08786391A EP08786391A EP2173996A1 EP 2173996 A1 EP2173996 A1 EP 2173996A1 EP 08786391 A EP08786391 A EP 08786391A EP 08786391 A EP08786391 A EP 08786391A EP 2173996 A1 EP2173996 A1 EP 2173996A1
Authority
EP
European Patent Office
Prior art keywords
piston
thread
internal combustion
cooling channel
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.)
Withdrawn
Application number
EP08786391A
Other languages
German (de)
English (en)
Inventor
Achim Fedyna
Gottfried Schnaitmann
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 EP2173996A1 publication Critical patent/EP2173996A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/10—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass 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
    • 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 present invention relates to a built, in particular two-part piston of an internal combustion engine with a Kolbenober- and a piston lower part according to the preamble of claim 1.
  • such pistons can be designed in two parts, wherein a piston upper part and a piston lower part in a be made separately in a forging process.
  • An advantage of this variant is that a cooling channel can be closed directly by the geometric shape of the Kolbenober- and -Schteils.
  • the disadvantage is that after closing the cooling channel processing of the joint is excluded. If, for example, a welding method is used as joining method in which a high heat input leads to a melting of the joining zone and thus to a connection, this can result in a joining seam being produced by the joining, which is for example pronounced as a bead. This bead can not be removed later and may affect the cooling medium flow and thus the cooling effect negatively.
  • a generic piston is known for example from DE 102 09 168 B4 and DE 41 34 530 C2.
  • the present invention is concerned with the problem of providing an improved embodiment of a generic piston, which in particular overcomes the known from the prior art disadvantages, such as a cooling effect negatively influencing weld bead with.
  • the invention is based on the general idea to connect a Kolbenober- and -unterteil a two-piece piston built together via a thread, that is to screw together.
  • the piston upper part encloses together with the piston lower part a cooling channel or a cooling channel structure, wherein the cooling channel or the cooling channel structure after joining, that is, after screwing the two piston parts together, is sealed.
  • the upper piston part and the lower piston part are made of the same material or at least have materials with the same coefficients of thermal expansion.
  • a thread on the upper piston part and / or on the lower piston part are produced with oversize and screwed together both piston parts by means of a thermal joining process.
  • a screw connection of the two piston parts with one another is only possible if at least one of the two piston parts is heated or cooled and can be screwed onto the thread of the other piston part due to the thermal expansion or thermal contraction.
  • a subsequent cooling or warming up the thread of a piston part is shrunk onto the thread of the other piston part and thereby joined gas-tight. Further, in particular costly sealing methods are therefore not required.
  • the piston according to the invention may comprise a fine thread, which is sealed by a subsequent bonding or soldering the screwing.
  • a thermal heating or cooling process is dispensed with and the sealing of the thread is sealed only by its geometric configuration as a fine thread with subsequent gluing or soldering. This makes it possible to dispense with a heating or cooling device for thermal joining.
  • FIG. 1 shows a piston upper part of a built-up piston according to the invention
  • Fig. 4 is a detail view of a thread between Kolbenober- and -unterteil.
  • 1 shows a piston upper part 1 of a piston 3 (see FIG. 3) constructed from this and a piston lower part 2 (see FIG.
  • the piston 3 can be arranged in an otherwise not shown internal combustion engine, in particular in a motor vehicle. Connected, the two piston parts 1 and 2 via a thread 4, which in particular further joining methods, such as welding, unnecessary.
  • the thread 4 of the upper piston part 1 is formed as an internal thread
  • the thread 4 of the lower piston part 2 according to FIG. 2 is designed as a complementary external thread.
  • the joint 5 that is, the thread 4
  • the joint 5 must be gas-tight, in particular sealed against so-called blow-by gases.
  • the upper piston part 1 and the lower piston part 2 when bolted together, enclose a cooling channel 7 or a cooling channel structure, wherein the cooling channel 7 surrounds an upper part of the piston lower part 2 in a ring shape.
  • the cooling channel 7 is acted upon during operation of the internal combustion engine with a cooling medium, in particular with engine oil, and is flowed through by this.
  • the thread 4 must also be tight. compared to the cooling medium, so for example tight against engine oil, be formed.
  • a collar 8 is arranged on the lower piston part 2, which has an annular sealing edge 9.
  • the upper piston part 1 has a sealing contour 10, in particular a sealing groove, facing the sealing edge 9 of the piston lower part 2, in / on which the sealing edge 9 rests tightly when the piston upper and lower parts 1, 2 are completely screwed together.
  • a further joint 5 'between the upper piston part 1 and the lower piston part 2 is sealed at finished built-piston 3.
  • a passage opening 11, in particular a bore can be provided in the piston lower part 2, which connects the cooling channel 7 with a cooling circuit.
  • a thread 4 on the upper piston part 1 and / or on the lower piston part 2 can be made with oversize and the two piston parts 1 and 2 are bolted together by means of a thermal joining process.
  • the piston upper part 1 is heated and screwed on the piston lower part 2 in a warm state. After cooling the upper piston part 1 shrinks the latter, whereby a dense thermal joint seat can be achieved.
  • the same can be achieved, for example, by cooling the lower piston part 2, as a result of which it contracts and can be easily screwed to the piston upper part 1. at a subsequent warming of the piston lower part 2, this expands and thus also forms a dense thermal joint seat the piston upper part.
  • the thread 4 is formed as a fine thread and is sealed by a screwing subsequent gluing or soldering.
  • the two piston parts 1 and 2 are screwed together in a cold state, wherein the gas-tightness is generated by the above-mentioned subsequent soldering or gluing of the thread 4.
  • Such a thread 4 between the upper piston part 1 and the lower piston part 2 also allows a very precise alignment of the two piston parts 1 and 2 to each other, so that the two piston parts 1 and 2 can be performed finished in many areas before joining with each other. After joining then only the areas of the piston parts 1 and 2 are to be reworked, which are linked via tolerance information, such as squareness or parallelism, directly to each other.
  • the upper piston part 1 and the lower piston part 2 are made of the same material or at least of materials with the same coefficient of thermal expansion. This ensures the tightness of the joints 5 and 5 'in the temperature ranges in question.
  • FIG. 4 a detailed representation of the thread 4 on the upper piston part 1 and on the lower piston part 2 is finally shown, wherein an oversize, that is, an overlap of the flank diameter of the two threads 4 is visible.

Landscapes

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

Abstract

L'invention concerne un piston assemblé (3), en particulier en deux parties, d'un moteur à combustion interne, comprenant une partie supérieure de piston (1) et une partie inférieure de piston (2). L'invention est caractérisée en ce que la partie supérieure de piston (1) est assemblée avec la partie inférieure de piston (2) au moyen d'un filetage (4).
EP08786391A 2007-08-02 2008-07-24 Piston assemblé Withdrawn EP2173996A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007036236A DE102007036236A1 (de) 2007-08-02 2007-08-02 Gebauter Kolben
PCT/EP2008/059699 WO2009016089A1 (fr) 2007-08-02 2008-07-24 Piston assemblé

Publications (1)

Publication Number Publication Date
EP2173996A1 true EP2173996A1 (fr) 2010-04-14

Family

ID=39884618

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08786391A Withdrawn EP2173996A1 (fr) 2007-08-02 2008-07-24 Piston assemblé

Country Status (6)

Country Link
US (1) US20110168016A1 (fr)
EP (1) EP2173996A1 (fr)
JP (1) JP2010535306A (fr)
KR (1) KR20100061446A (fr)
DE (1) DE102007036236A1 (fr)
WO (1) WO2009016089A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009041392A1 (de) 2009-09-12 2011-05-26 Daimler Ag Kolben für eine Verbrennungskraftmaschine
DE102011083994A1 (de) 2010-10-05 2012-04-05 Ks Kolbenschmidt Gmbh Verbesserungen an einem Brennraummuldenrand und an einem Brennraummuldengrund eines Kolbens einer Brennkraftmaschine
DE102010056220A1 (de) * 2010-12-24 2012-06-28 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102010056218A1 (de) * 2010-12-24 2012-06-28 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102011115826A1 (de) * 2011-10-13 2013-04-18 Mahle International Gmbh Kolben für einen Verbrennungsmotor
EP2888466A1 (fr) * 2012-08-23 2015-07-01 KS Kolbenschmidt GMBH Assemblage d'un piston en acier en deux parties et procédé d'assemblage
CN105143732A (zh) * 2013-01-29 2015-12-09 马勒国际有限公司 具有第四环导槽和改良摩擦特性的钢制活塞
CN103912400A (zh) * 2014-04-09 2014-07-09 安徽科信矿山机械制造有限公司 一种发动机顶出活塞块
CN104747312A (zh) * 2015-02-16 2015-07-01 山东滨州渤海活塞股份有限公司 带内冷油腔结构的内燃机活塞及内燃机
MX2018013353A (es) 2016-05-04 2019-02-20 Ks Kolbenschmidt Gmbh Piston.
EP3488672B1 (fr) 2016-07-20 2021-10-20 Stackpole International Engineered Products, Ltd. Ensemble de pompe avec dispositif de commande intégré et moteur avec refroidissement actif interne

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7221644U (de) * 1972-08-31 Soc Amo Kolben für Brennkraftmaschinen
US1329820A (en) * 1916-08-19 1920-02-03 Aluminum Castings Company Composite piston
US1357851A (en) * 1916-09-01 1920-11-02 Aluminium Castings Company Composite piston
DE341418C (de) * 1919-08-20 1921-10-01 Max Preuss Dipl Ing Kolben fuer Verbrennungsmotoren mit einsetzbarem Boden zur Veraenderung des Kompressionsraumes
DE420605C (de) * 1924-03-07 1925-10-29 Siemens Schuckertwerke G M B H Kolben fuer Verbrennungskraftmaschinen
US1940629A (en) * 1930-11-01 1933-12-19 Elektronmetall Gmbh Piston alloy
US1944708A (en) * 1931-11-10 1934-01-23 Ingersoll Rand Co Piston
FR805449A (fr) * 1936-04-24 1936-11-19 Piston à jupe d'étanchéité indépendante
US2159989A (en) * 1937-04-19 1939-05-30 Gen Motors Corp Welded two-piece light alloy piston
US2198771A (en) * 1937-04-19 1940-04-30 Gen Motors Corp Welded two-piece light alloy piston
GB521632A (en) * 1938-11-24 1940-05-27 Coventry Climax Eng Ltd Cooling of pistons for fluid-pressure engines
US2244008A (en) * 1939-06-16 1941-06-03 Gen Motors Corp Piston construction
US2581326A (en) * 1949-03-29 1952-01-01 Chrysler Corp Piston
US2772933A (en) * 1955-06-22 1956-12-04 Alco Products Inc Pistons
GB1542230A (en) * 1977-01-20 1979-03-14 Wellworthy Ltd Pistons
JPS5831463B2 (ja) * 1978-08-15 1983-07-06 トヨタ自動車株式会社 機関用組立式ピストン
BR9005376A (pt) 1990-10-18 1992-06-16 Metal Leve Sa Embolo bipartido com fechamento postico de galeria e processo para sua obtencao
US6003479A (en) * 1997-05-12 1999-12-21 Evans; Mark M. Piston construction
DE10209168B4 (de) 2002-03-01 2004-06-03 Ks Kolbenschmidt Gmbh Stahlkolben mit Kühlkanal
DE10307908B4 (de) * 2003-02-19 2005-03-03 Andreas Mozzi Mehrteiliger Kolben
DE10325914B4 (de) * 2003-06-07 2012-08-02 Mahle Gmbh Kolben für einen Verbrennungsmotor
DE10340292A1 (de) * 2003-09-02 2005-04-14 Mahle Gmbh Kolben für einen Verbrennungsmotor
DE10340291A1 (de) * 2003-09-02 2005-04-14 Mahle Gmbh Kolben für einen Verbrennungsmotor
DE102005044597A1 (de) * 2005-09-17 2007-03-29 Mahle International Gmbh Kolben für einen Verbrennungsmotor
US7600456B2 (en) * 2005-11-21 2009-10-13 Robert Bosch Gmbh Modular guard system for a power saw
US20070295299A1 (en) * 2006-06-12 2007-12-27 Mahle Technology, Inc. Piston for a combustion engine
DE102008038325A1 (de) * 2007-12-20 2009-06-25 Mahle International Gmbh Verfahren zum Befestigen eines Ringelementes auf einem Kolben für einen Verbrennungsmotor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009016089A1 *

Also Published As

Publication number Publication date
JP2010535306A (ja) 2010-11-18
KR20100061446A (ko) 2010-06-07
DE102007036236A1 (de) 2009-02-05
US20110168016A1 (en) 2011-07-14
WO2009016089A1 (fr) 2009-02-05

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