WO2012116987A1 - Piston refroidi et son procédé de fabrication - Google Patents

Piston refroidi et son procédé de fabrication Download PDF

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Publication number
WO2012116987A1
WO2012116987A1 PCT/EP2012/053363 EP2012053363W WO2012116987A1 WO 2012116987 A1 WO2012116987 A1 WO 2012116987A1 EP 2012053363 W EP2012053363 W EP 2012053363W WO 2012116987 A1 WO2012116987 A1 WO 2012116987A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
separating element
oil
cooling channel
unprocessed
Prior art date
Application number
PCT/EP2012/053363
Other languages
German (de)
English (en)
Inventor
Matthias Laqua
Original Assignee
Ks Kolbenschmidt 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 Ks Kolbenschmidt Gmbh filed Critical Ks Kolbenschmidt Gmbh
Priority to JP2013555850A priority Critical patent/JP6005071B2/ja
Priority to KR1020137021638A priority patent/KR20140007381A/ko
Priority to CN2012800078927A priority patent/CN103380283A/zh
Priority to EP12706571.2A priority patent/EP2681436A1/fr
Publication of WO2012116987A1 publication Critical patent/WO2012116987A1/fr

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 
    • F02F3/0015—Multi-part pistons
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together

Definitions

  • the invention relates to a piston of an internal combustion engine, comprising a piston head and a cooling channel, in which a separating element is positioned with at least one opening, whereby a pressure space between a part of the wall of the cooling channel and the separating element is formed with the oil under pressure by means of at least one oil inlet is filled, wherein the oil exits the opening and impinges at least on a portion of the cooling channel, so that the piston is cooled, and a method for producing a piston of an internal combustion engine, which is cooled after production of the piston by sprayed oil, said Oil from a pressure chamber through at least one opening of a separating element, which is positioned in a cooling channel of the piston and thereby forms in the cooling channel with oil via at least one oil inlet fillable pressure space between a part of the wall of the cooling channel and the separating element, at least targeted to a range of the cooling duct is injected as by pressure generated in the oil-filled pressure chamber.
  • a two-part piston in the cooling channel of which an annular partition wall arranged parallel to the piston bottom is provided, which has one or more nozzle-like openings which are arranged such that their respective exit jet aligns with the underside of the piston crown is.
  • the space located below the partition is preferably completely filled with cooling oil, so that at the at least one nozzle-like opening a particularly high cooling pressure is applied and the cooling oil jet with ejection from the opening undergoes optimal acceleration.
  • the dividing wall is between the inner or outer support surface of the two-part piston and the support surface associated therewith arranged so that it is particularly easy to assemble and fasten.
  • the dividing wall is designed as a wall part integrated in the piston head or in the piston shaft, which is also molded during the production of the piston.
  • the dividing wall is arranged in the region of the cooling channel formed by the piston skirt.
  • a disadvantage of this piston known from the prior art is that the partition for the piston is manufactured as a separate component and is therefore manufactured independently of the piston production.
  • a partition wall which has already been cast into the piston also has the disadvantage that the dividing wall and the cooling channel of the piston can only be processed to a limited extent after the casting process.
  • the object of the invention is therefore to provide a good coolable piston, which is simple and inexpensive to produce and which does not have the above-mentioned disadvantages of the prior art.
  • the object is achieved in that the unprocessed separating element can be positioned on the wall of the later cooling channel, so that the separating element can be machined in the production of the piston, thereby eliminating the processing of the piston separate processing of the separating element.
  • the separating element can be positioned in the unprocessed state on the wall of the subsequent cooling channel of the piston, so that a separate production of the piston production of the separating element is eliminated, since the separating element is processed in the production of the piston.
  • the separator, as well as the piston simple and inexpensive to produce.
  • an automatic machining of the piston together with the separating element is possible, thereby reducing production costs and, in addition, reducing the production time.
  • the piston consists of an upper part and a lower part. It is possible to manufacture the upper part and the lower part separately, for example by means of a primary shaping production method, for example by means of casting, by means of a forming manufacturing method, for example by forging, and / or by means of a metal-cutting manufacturing method, for example by means of turning, milling and / or grinding.
  • the upper part and the lower part of the piston consist in a further advantageous embodiment of a same light metal material, such as aluminum, magnesium or their alloys, or of a same metallic material, such as a steel material or a material for casting.
  • a same light metal material such as aluminum, magnesium or their alloys
  • a same metallic material such as a steel material or a material for casting.
  • the upper part and the lower part each consist of a different one of the aforementioned materials.
  • the upper part adjoins the lower part in the assembled state in a further advantageous embodiment, at least on a common, corresponding bearing surface of the upper part and the lower part, so that the upper part and the lower part are easily positionable.
  • the upper part is connected in a further advantageous embodiment with the lower part in the assembled state of the piston, for example by means of at least one screw connection, welded connection, press connection, clamp connection or the like.
  • the unprocessed separating element is attached to the upper part, so that the separating element in the context of the processing of the upper part is editable.
  • the unprocessed separating element is attached to the lower part, so that the separating element in the context of the processing of the lower part is machined. It is possible that the unprocessed separating element on the upper part or the lower part by means of at least a screw connection, welded joint, press connection, clamp connection or the like is attached.
  • the unprocessed separating element is annular. It is possible that the unprocessed separating element is composed of several individual pieces, for example, the composite result in a circumferential ring shape. Alternatively, it is possible that the piston has a plurality of unprocessed separating elements as individual parts, which are each inserted into a cooling channel formed interrupted. In a particularly preferred embodiment, the unprocessed separating element is formed as a one-piece ring, so that the one-piece ring can be positioned in a circumferential cooling channel.
  • the unprocessed separating element may for example consist of a light metal material, such as aluminum, magnesium or their alloys, or of a metallic material, such as a steel material or a material for casting.
  • the opening of the separating element is formed nozzle-shaped after processing of the separating element. It is possible that the unprocessed separating element already has partially prefabricated openings, which are machined nozzle-shaped in the context of processing. Alternatively, it is possible that the unprocessed separating element has no openings, so that the openings are incorporated only in the context of processing in the separating element.
  • the oil emerging from the opening of the separating element is targeted to at least one region of the wall of the cooling channel, in particular to at least one region on the underside of the piston crown and / or to at least one region of the wall opposite the ring section, is alignable.
  • the nozzle-shaped opening of the separating element can, for example, have the shape of a cone, funnel, tube, the shape of a Venturi nozzle or the like.
  • the number of openings and / or the diameter of the openings in the separating element varies.
  • the separating element is sealed to the wall of the cooling channel by means of at least one sealing element, preferably by means of an O-ring. If the unprocessed separating element is attached to the upper part and the upper part is connected to the separately machined lower part after the common processing of both the upper part and the separating element, it is possible that the gap forming between the separating element and the lower part is sealed by means of a sealing element are.
  • the surface of the lower part, which touches the sealing element directly made particularly accurate fit.
  • the area of the separating element, which receives the sealing element for example an O-ring, is made particularly precisely fitting.
  • the separating element may, for example, have a groove or the like for receiving an O-ring.
  • a tailor-made production means a production in which, for example, a particularly good surface quality and a particularly high accuracy of fit are achieved.
  • the separating element in which the separating element is fastened to the lower part, it is possible that the gap which forms between the upper part and the separating element after assembly of the piston is sealed with a sealing element, such as an O-ring.
  • a sealing element such as an O-ring.
  • the coming into contact with the sealing element surface of the upper part is made particularly accurate fit.
  • the separating element can in this alternative Embodiment, for example, for receiving an O-ring have a groove or the like.
  • the piston has at least one pin bore, which in addition to the function of receiving the pin also fills the oil inlet with oil.
  • the oil inlet of the piston can be filled via a separate oil supply.
  • the invention claims a method for producing a piston of an internal combustion engine, wherein the unprocessed separating element is positioned on the wall of the later cooling channel of the piston prior to processing of the piston so that the separating element works together with the piston during the production of the piston is, thereby eliminating the processing of the piston separate processing of the separating element.
  • the piston is preferably made of an upper part and a lower part.
  • the unprocessed separating element is preferably attached to the upper part, so that subsequently the separating element is processed together with the upper part.
  • the unprocessed separating element is preferably fastened to the lower part, so that subsequently the separating element is processed together with the lower part.
  • the separating element is preferably sealed to the wall of the cooling channel by means of at least one sealing element, preferably by means of an O-ring.
  • the oil inlet of the piston is preferably filled with oil by means of at least one pin bore of the piston.
  • the Olzulauf of the piston is filled via a separate oil supply.
  • FIG. 1 shows a finished piston 1 of an internal combustion engine, which consists of a top part 2 and a bottom part 3.
  • the upper part 2 has a peripheral over the circumference of the piston ring portion 4 with three annular grooves for receiving unillustrated piston rings, a combustion bowl 5 in the region of the piston head 14 and a part of the cooling channel 9 in the form of a recess.
  • the underside of the piston crown 14 can be seen according to FIG.
  • the lower part 3 contains in the example a plurality of oil inlets 15, which open into a further recess which forms part of the cooling channel 9.
  • the lower part 3 according to FIG. 1 has two bolt holes 6 which receive a bolt, by means of which a connecting rod 7 is connected to the lower part 3 or the piston 1.
  • the two pin holes 6 also fill the oil feeds 15 continuously with oil.
  • the upper part 2 is positioned on the lower part 3 in the region of a plurality of corresponding contact surfaces, the upper part 2 being fixedly connected to the lower part 3 by means of a plurality of screw connections 8.
  • an unprocessed separating element 10 Prior to assembly of the piston 1 according to Figure 1, an unprocessed separating element 10 is positioned on the wall of the cooling channel 9 of the unprocessed lower part 3, which has a plurality of openings 13 after its processing.
  • the separating element 10 By attaching the unprocessed separating element 10 to the unprocessed lower part 3, the separating element 10 in the context of processing the lower part 3 with editable, whereby the processing of the piston 1 separate processing of the separating element 10 is omitted.
  • the attached to the lower part 3 separating element 10 is formed in the embodiment as a one-piece ring, so that the separating element 10, the cooling channel 9 over its entire circumference in two areas, namely a reduced cooling channel 9 ' and a pressure chamber 1 1, divides.
  • FIG. 1 shows the finished separating element 10.
  • the resulting between a part of the wall of the cooling channel 9 and the separator 10 pressure chamber 1 1 is filled with oil under pressure by means of the oil feeds 15.
  • the O-ring 12 is positioned according to FIG. 1 in a groove which has the processed separating element 10.
  • the openings 13 of the processed separating element 10 are nozzle-shaped, tubular in the example, according to FIG.
  • the number of openings 13 and the diameter of the openings 13 in the processed partition member 10 varies over the entire circumference of the cooling channel 9.
  • the production of the piston 1 according to FIG. 1 will be described in more detail below, which is produced inter alia from an upper part 2 and a lower part 3.
  • an unprocessed separating element 10 and an unprocessed lower part 3 are produced on the one hand.
  • the unprocessed, designed as a ring separator 10 is positioned on the wall of the subsequent cooling channel 9 of the lower part 3 before the subsequent processing of the unprocessed lower part 3.
  • the unprocessed separating element 10 is thus to be seen after the attachment to the unprocessed lower part 3 as a contour of the unprocessed lower part 3.
  • the unprocessed separating element 10 attached to the unprocessed lower part 3 is processed together with the unprocessed lower part 3 in the course of the production of the lower part 3. This eliminates the separate processing of the unprocessed separating element 10 and the unprocessed lower part 3.
  • the unprocessed separating element 10 has no openings 13.
  • the openings 13 are thus introduced during processing and machined with.
  • the bolt holes 6, the oil feeds 15 and the shaft elements (not shown) of the piston 1 introduced and edited.
  • the oil inlets 15 are holes in the embodiment.
  • the upper part 2 is manufactured and processed. According to FIG. 1, as part of the processing of the upper part 2, for example, the combustion chamber trough 5 and the ring section 4 are introduced.
  • the areas of the subsequent cooling channel 9 in the form of a respective recess and the corresponding bearing surfaces for upper part 2 and lower part 3 are introduced and processed.
  • the region of the upper part 2 on the wall of the subsequent cooling channel 9 is machined to fit, to which an O-ring 12 for sealing the subsequent pressure chamber 1 1 is applied.
  • the separating element 10 is sealed to the wall of the cooling channel 9 by means of at least the O-ring 12 according to Figure 1, which circulates as the separating element 10, the entire cooling channel 9.
  • the oil present in the pressure chamber 11 by means of the supply under pressure continuously exits the openings 13.
  • the oil flows continuously with a certain pressure and a certain volume flow through the oil feeds 15 into the pressure chamber 1 1, so that a pressure in the pressure chamber 1 1 is formed, which escapes through the openings 13 by means of continuous ejection of the oil.
  • the oil is distributed over the entire circumference of the pressure chamber 11 in the piston 1.
  • the piston 1 By the oil exiting the openings 13 and at least to a portion of the wall of the reduced cooling channel 9 ' , in particular at least a portion of the underside of the piston head 14 and at least a portion of the ring section 4 opposite wall, impinges, the piston 1 is continuous and well chilled.
  • the targeted cooling of the piston 1 by means of the oil jets emerging from the openings 13 in particular reduces the surface temperature in the region of the combustion bowl 5 and the region of the ring section 4.
  • the temperature of the piston 1 during operation of the piston 1 in an internal combustion engine is also reduced by the escaping oil steels.
  • the ejection of the located under pressure in the pressure chamber 1 1 oil from the pressure chamber 1 1 is further enhanced by a so-called shaker effect during the movement and operation of the piston 1 in the internal combustion engine.
  • the shaker effect By means of the shaker effect, the oil is ejected from the pressure chamber 1 1 due to the upward and downward movement of the piston 1 in the internal combustion engine, but especially in the downward movement of the piston 1 in the direction of connecting rod 7, due to its inertia from the openings 13.

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)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un piston (1) d'un moteur à combustion interne, comprenant un culot de piston (14) et un canal de refroidissement (9) dans lequel est positionné un élément de séparation (10) pourvu d'au moins une ouverture (13), grâce auquel une chambre de pression (11) se forme entre une partie de la paroi du canal de refroidissement (9) et de l'élément de séparation (10), laquelle chambre est remplie d'huile sous pression au moyen d'un conduit d'amenée huile (15), l'huile sortant de l'ouverture (13) et arrivant sur au moins une région du canal de refroidissement (9e) de sorte que le piston puisse être refroidi. Selon l'invention, l'élément de séparation (10) non usiné peut être positionné sur la paroi du futur canal de refroidissement (9) de sorte que l'élément de séparation (10) puisse être usiné simultanément à la fabrication du piston (1), l'usinage de l'élément de séparation (10) distinct de l'usinage du piston (1) étant ainsi supprimé. L'invention concerne également un procédé de fabrication d'un tel piston (1) de moteur à combustion interne.
PCT/EP2012/053363 2011-03-01 2012-02-28 Piston refroidi et son procédé de fabrication WO2012116987A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2013555850A JP6005071B2 (ja) 2011-03-01 2012-02-28 冷却されたピストンと、該ピストンの製造方法
KR1020137021638A KR20140007381A (ko) 2011-03-01 2012-02-28 냉각식 피스톤 및 이를 제조하기 위한 방법
CN2012800078927A CN103380283A (zh) 2011-03-01 2012-02-28 冷却的活塞及其制造方法
EP12706571.2A EP2681436A1 (fr) 2011-03-01 2012-02-28 Piston refroidi et son procédé de fabrication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011012758A DE102011012758A1 (de) 2011-03-01 2011-03-01 Gekühlter Kolben und Verfahren zu dessen Herstellung
DE102011012758.5 2011-03-01

Publications (1)

Publication Number Publication Date
WO2012116987A1 true WO2012116987A1 (fr) 2012-09-07

Family

ID=45774216

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/053363 WO2012116987A1 (fr) 2011-03-01 2012-02-28 Piston refroidi et son procédé de fabrication

Country Status (6)

Country Link
EP (1) EP2681436A1 (fr)
JP (1) JP6005071B2 (fr)
KR (1) KR20140007381A (fr)
CN (1) CN103380283A (fr)
DE (1) DE102011012758A1 (fr)
WO (1) WO2012116987A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113748263A (zh) * 2019-04-09 2021-12-03 Ks科尔本施密特有限公司 具有通向冷却通道中的漏斗形的进口的冷却通道活塞

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015215482A1 (de) * 2014-08-15 2016-02-18 Ks Kolbenschmidt Gmbh Kühlölring
KR20170107478A (ko) 2015-01-30 2017-09-25 페더럴-모걸 엘엘씨 냉각 갤러리용 냉각 인서트를 보유한 피스톤 및 그 제조 방법
DE102015215803A1 (de) * 2015-08-19 2017-02-23 Federal-Mogul Nürnberg GmbH Verfahren zur Herstellung zumindest eines Teils eines Stahl- oder Aluminiumkolbens für einen Verbrennungsmotor sowie Stahl- oder Aluminiumkolben für einen Verbrennungsmotor
DE102019215486A1 (de) * 2019-10-09 2021-04-15 Mahle International Gmbh Kolben für eine Brennkraftmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB348084A (en) * 1928-11-09 1931-04-28 Hugo Junkers Improvements in and relating to pistons for engines
EP0747591A1 (fr) * 1995-06-07 1996-12-11 New Sulzer Diesel Ag Piston refroidi par un liquide pour un moteur a combustion interne
DE102004038465A1 (de) * 2004-08-07 2006-02-23 Ks Kolbenschmidt Gmbh Kolben, insbesondere Kühlkanalkolben einer Brennkraftmaschine, mit zumindest drei Reibschweißzonen
WO2007110056A1 (fr) 2006-03-25 2007-10-04 Mahle International Gmbh Piston de moteur à combustion interne

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57206751A (en) * 1981-06-11 1982-12-18 Mitsubishi Heavy Ind Ltd Cooling device of piston
US4608947A (en) * 1985-07-05 1986-09-02 Klockner-Humboldt-Deutz Aktiengesellschaft Arrangement for cooling pistons and cylinder sleeves
JPS6217347A (ja) * 1985-07-16 1987-01-26 Mitsubishi Heavy Ind Ltd 内燃機関のピストン
US4986167A (en) * 1989-05-25 1991-01-22 Caterpillar Inc. Articulated piston with a cooling recess having a preestablished volume therein
EP1924765A1 (fr) * 2005-09-17 2008-05-28 KS Kolbenschmidt GmbH Piston, en particulier piston a canal de refroidissement d'un moteur a combustion interne, comportant au moins trois zones de soudure par friction
KR20120075455A (ko) * 2009-07-25 2012-07-06 카에스 콜벤슈미트 게엠베하 피스톤을 냉각시키기 위한 방법 및 냉각된 피스톤

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB348084A (en) * 1928-11-09 1931-04-28 Hugo Junkers Improvements in and relating to pistons for engines
EP0747591A1 (fr) * 1995-06-07 1996-12-11 New Sulzer Diesel Ag Piston refroidi par un liquide pour un moteur a combustion interne
DE102004038465A1 (de) * 2004-08-07 2006-02-23 Ks Kolbenschmidt Gmbh Kolben, insbesondere Kühlkanalkolben einer Brennkraftmaschine, mit zumindest drei Reibschweißzonen
WO2007110056A1 (fr) 2006-03-25 2007-10-04 Mahle International Gmbh Piston de moteur à combustion interne

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113748263A (zh) * 2019-04-09 2021-12-03 Ks科尔本施密特有限公司 具有通向冷却通道中的漏斗形的进口的冷却通道活塞

Also Published As

Publication number Publication date
KR20140007381A (ko) 2014-01-17
EP2681436A1 (fr) 2014-01-08
JP6005071B2 (ja) 2016-10-12
JP2014508887A (ja) 2014-04-10
CN103380283A (zh) 2013-10-30
DE102011012758A1 (de) 2012-09-06

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