EP1546534B1 - Piston refroidi compos de plusieurs parties pour moteur combustion interne - Google Patents

Piston refroidi compos de plusieurs parties pour moteur combustion interne Download PDF

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Publication number
EP1546534B1
EP1546534B1 EP03769201.9A EP03769201A EP1546534B1 EP 1546534 B1 EP1546534 B1 EP 1546534B1 EP 03769201 A EP03769201 A EP 03769201A EP 1546534 B1 EP1546534 B1 EP 1546534B1
Authority
EP
European Patent Office
Prior art keywords
piston
boreholes
cooling channel
piston part
ring
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
EP03769201.9A
Other languages
German (de)
English (en)
Other versions
EP1546534A1 (fr
Inventor
Hans-Jürgen Köhnert
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 EP1546534A1 publication Critical patent/EP1546534A1/fr
Application granted granted Critical
Publication of EP1546534B1 publication Critical patent/EP1546534B1/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 
    • F02F3/0084—Pistons  the pistons being constructed from specific materials
    • 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
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • 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
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • F02F2003/0061—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by welding
    • 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 an internal combustion engine, with a steel forged piston upper part comprising a combustion recess in the piston crown and a ring wall with ring portion, and a piston lower part having a piston skirt, hubs for receiving the piston connecting the piston rod with the piston and includes hub supports connected to the piston skirt, such as from WO 8002 308 A , or the DE 3707462 is known.
  • a multi-part cooled piston for an internal combustion engine is further from the JP 61175255 A known.
  • This piston shows at the level of the ring portion of the piston a number of ribs, between which a heat-insulating plate for minimizing the heat transfer from the combustion bowl to the ring section is arranged.
  • the invention is therefore based on the object to provide a piston concept for a multi-part cooled piston, with which a cost-effective production is ensured and can be counteracted with the effect of a piston deformation due to the effect of high gas pressures and temperatures.
  • a cooling channel formed in the upper part of the piston has bores directed towards the piston crown on its circumference, the piston material present between the bores Support ribs forming radially to the piston longitudinal axis each form sections of a circumferential annular rib.
  • a piston lower part has an annular circumferential support rib connected to the hub supports and a joining surface. The piston upper part and the lower piston part are connected to the joining surfaces of ring and support ribs inseparably with each other by means of a welding or soldering process, wherein the cooling channel can be closed by a cooling channel cover.
  • the cooling channel can be formed closer to the piston crown or combustion bowl and nevertheless has excellent dimensional stability.
  • the arrangement of the support ribs provides some sort of chamber formation in the cooling channel, i. Generation of shaker chambers, whereby an extension of the residence time of the cooling oil and thus improved heat dissipation of the piston areas to be cooled is achieved.
  • the multi-part cooled piston 20 consists of a forged piston upper part 1 with a combustion bowl 3, ring wall 4 with ring portion 11 and a cooling channel 7 and a piston lower part 2, the piston shaft 9 and hub supports 6, as from Fig. 5 can be seen.
  • holes 14 are provided in the cooling channel 7, which are arranged distributed symmetrically on the circumference and in the direction of the piston crown, ie parallel to the piston longitudinal axis K, are introduced.
  • the depth h B of the holes 14 is a maximum of half the total height H of the cooling channel 7, so that an unhindered cooling oil circuit is ensured.
  • the respective oil inlet and oil outlet is not shown.
  • the cooling channel cover 13 which consists of a two-part, with an oil inlet and oil outlet (not shown) provided spring element, the closure of the cooling channel 7 takes place at its end open towards the piston skirt 9.
  • FIGS. 3 and 4 show, between the holes 14 designated as support ribs 8 material areas go radially to the piston longitudinal axis K in sections of an annular rib 5, which forms the annular rib 5 in its entirety.
  • the holes 14 and thus the support ribs 8 are, as in Fig. 4 represented, distributed radially symmetrically over the circumference of the cooling channel 7 arranged.
  • the number of holes and thus distribution of the support ribs 8 may be designed such that in pressure-back pressure direction D and GD, a larger number of support ribs 8 is arranged as transverse thereto, ie, a single-ended circumferential distribution takes place in the cooling channel 7.
  • the holes 14 can thereby by round holes, as in the FIGS. 4 and 6 shown, or oblong holes (not shown), which are aligned with its long side in the direction of the piston center radially outward to the piston wall.
  • the tips of the holes 14 may be round or, as in Fig. 1 shown to be angled.
  • the axes of the holes 14 can, as Fig. 1 shows, parallel to the piston longitudinal axis K and / or, that is, in combination, to be arranged at an acute angle thereto, the bores 14 preferably in the direction of the combustion bowl 3 show.
  • annular circumferential support rib 10 is formed, as seen from Fig. 3 can be seen, which corresponds in their geometric dimensions with the annular rib 5.
  • the upper piston part 1 and lower piston part 2 is connected to each other via the support and annular ribs 10 and 5 by means of a welding or soldering process.
  • the upper piston part 1 is advantageously formed of an oxidation-resistant and / or heat-resistant material and the lower piston part 2 of a precipitation-hardening ferritic-pearlitic steel or tempered 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)
  • Fuel-Injection Apparatus (AREA)

Claims (8)

  1. Piston refroidi en plusieurs parties (20) pour un moteur à combustion, avec une partie supérieure de piston (1) forgée en acier, comprenant une cavité de combustion (3) dans le fond de piston et une paroi annulaire (4) avec des parties d'anneau (11), et avec une partie inférieure de piston (2) comprenant une tige de piston (9), des bossages (12) destinés à recevoir l'axe de piston reliant le piston (10) à la bielle, ainsi que des appuis de bossage (6) reliés à la tige de piston (9), dans lequel la partie supérieure de piston comporte une nervure annulaire (5) circonférentielle et la partie inférieure de piston (2) comporte une nervure de support (10) annulaire périphérique reliée aux appuis de bossage (6), avec une surface d'assemblage, dans lequel la partie supérieure (1) et la partie inférieure (2) sont reliées de façon non-détachable au moyen des surfaces d'assemblage des nervures annulaire et de support (5, 10), et le canal de refroidissement (7) peut être fermé au moyen d'un couvercle de canal de refroidissement (13),
    caractérisé en ce que
    un canal de refroidissement (7) moulé dans la partie supérieure de piston (1) comporte des perçages (14) répartis sur son pourtour et orientés vers le fond de piston, sachant que le matériau de piston présent entre les perçages (14) forme des nervures d'appui (8) formant respectivement des sections de la nervure annulaire périphérique (5) radialement vers l'axe longitudinal de piston (K).
  2. Piston (20) selon la revendication 1, caractérisé en ce que les perçages (14) sont répartis de façon radialement symétrique et/ou asymétrique sur le pourtour du canal de refroidissement (7).
  3. Piston (20) selon la revendication 1 ou 2, caractérisé en ce que les perçages (14) présentent une profondeur (hB) mesurant au maximum la moitié de la hauteur totale (H) du canal de refroidissement (7).
  4. Piston (20) selon la revendication 1 à 3, caractérisé en ce qu'au moins une partie des axes des perçages (14) s'étendent parallèlement à l'axe longitudinal de piston (K).
  5. Piston (20) selon la revendication 4, caractérisé en ce que les axes des perçages (14) s'étendent en formant un angle aigu par rapport à l'axe longitudinal de piston (K).
  6. Piston (20) selon la revendication 5, caractérisé en ce que les perçages (14) présentent une forme cylindrique ou oblongue.
  7. Piston (20) selon la revendication 1, caractérisé en ce que la liaison non-détachable entre la partie supérieure et la partie inférieure de piston (1, 2) est une liaison par soudage ou par brasage.
  8. Piston (20) selon la revendication 1, caractérisé en ce que la partie inférieure de piston (1) est constituée d'un matériau résistant à la corrosion et/ou résistant à la chaleur.
EP03769201.9A 2002-09-25 2003-09-19 Piston refroidi compos de plusieurs parties pour moteur combustion interne Expired - Lifetime EP1546534B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10244511A DE10244511A1 (de) 2002-09-25 2002-09-25 Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
DE10244511 2002-09-25
PCT/DE2003/003115 WO2004029440A1 (fr) 2002-09-25 2003-09-19 Piston refroidi composé de plusieurs parties pour moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP1546534A1 EP1546534A1 (fr) 2005-06-29
EP1546534B1 true EP1546534B1 (fr) 2014-11-19

Family

ID=31984026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03769201.9A Expired - Lifetime EP1546534B1 (fr) 2002-09-25 2003-09-19 Piston refroidi compos de plusieurs parties pour moteur combustion interne

Country Status (8)

Country Link
US (1) US6789460B2 (fr)
EP (1) EP1546534B1 (fr)
JP (1) JP2006500506A (fr)
KR (1) KR20050057575A (fr)
CN (1) CN100390395C (fr)
BR (1) BR0314788B1 (fr)
DE (1) DE10244511A1 (fr)
WO (1) WO2004029440A1 (fr)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2295777B1 (fr) * 2003-03-31 2016-12-07 Hitachi Metals, Ltd. Piston pour machine à combustion et son procédé de fabrication
DE102004019011A1 (de) * 2004-04-20 2005-11-17 Mahle Gmbh Kühlkanalabdeckung für einen Kolben eines Verbrennungsmotors
WO2005121608A1 (fr) * 2004-06-08 2005-12-22 Savice Limited Piston, segment de piston et ensemble piston pour moteur a deux temps
US7406941B2 (en) * 2004-07-21 2008-08-05 Federal - Mogul World Wide, Inc. One piece cast steel monobloc piston
DE102004057625A1 (de) * 2004-11-30 2006-06-01 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
DE102004057624A1 (de) * 2004-11-30 2006-06-01 Mahle International Gmbh Mehrteiliger, gekühlter Kolben für einen Verbrennungsmotor
DE102005037175A1 (de) * 2005-08-06 2007-02-08 Mahle International Gmbh Kolben für einen Verbrennungsmotor sowie Abdeckring für den Kühlkanal eines solchen Kolbens
US20080271597A1 (en) * 2006-03-31 2008-11-06 Soul David F Methods and apparatus for operating an internal combustion engine
US8807109B2 (en) 2009-11-06 2014-08-19 Federal-Mogul Corporation Steel piston with cooling gallery and method of construction thereof
US9970384B2 (en) * 2009-11-06 2018-05-15 Federal-Mogul Llc Steel piston with cooling gallery and method of construction thereof
EP3267022B1 (fr) * 2009-11-10 2018-10-03 Federal-Mogul LLC Piston avec élément de fuite et procédé de prévention de défaillance catastrophique d'un moteur à combustion interne
DE102010015568A1 (de) * 2010-04-19 2011-10-20 Ks Kolbenschmidt Gmbh Kolbenoberteil eines gebauten oder geschweißten Kolbens mit erweiterten Kühlräumen
US9856820B2 (en) * 2010-10-05 2018-01-02 Mahle International Gmbh Piston assembly
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
DE102011013113A1 (de) 2011-03-04 2012-09-06 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
EP2726724B1 (fr) * 2011-06-29 2018-08-22 Federal-Mogul LLC Piston avec élément de support sous la tête
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
JP2014185522A (ja) * 2013-03-21 2014-10-02 Hitachi Automotive Systems Ltd 内燃機関のピストン
BR112015025346A2 (pt) * 2013-04-05 2017-07-18 Federal Mogul Corp pistão produzido através do uso de técnicas de fabricação de aditivos
KR101449304B1 (ko) * 2013-06-27 2014-10-08 현대자동차주식회사 자동차 엔진용 피스톤의 제조 방법
DE102015002322A1 (de) * 2015-02-26 2016-09-01 Mahle International Gmbh Kolben für einen Verbrennungsmotor
JP6401104B2 (ja) * 2015-04-22 2018-10-03 株式会社クボタ エンジンのピストン
US10711732B2 (en) * 2017-01-19 2020-07-14 Industrial Parts Depot, Llc Reduced height piston
US11519359B1 (en) 2022-04-04 2022-12-06 Caterpillar Inc. Low compression natural gas engine piston bowl for improved combustion stability
GB2700144A (en) * 2023-12-21 2025-10-22 Cummins Power Generation Inc Piston head and piston head assembly

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EP0019323A1 (fr) * 1979-05-16 1980-11-26 Karl Schmidt Gmbh Piston pour moteurs à combustion interne
DE3707462A1 (de) * 1987-03-07 1988-09-15 Man B & W Diesel Gmbh Oelgekuehlter, mehrteiliger tauchkolben fuer brennkraftmaschinen

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JPS6329104B2 (fr) * 1979-04-23 1988-06-10 Kyatapiraa Inc
DE3008330A1 (de) * 1980-03-05 1981-09-17 Karl Schmidt Gmbh, 7107 Neckarsulm Fluessigkeitsgekuehlter kolben fuer brennkraftmaschinen
FR2483521A1 (fr) * 1980-05-30 1981-12-04 Semt Piston de machine a pistons alternatifs, notamment de moteur a combustion interne
JPS61175255A (ja) 1985-01-30 1986-08-06 Mitsubishi Heavy Ind Ltd 内燃機関用断熱ピストン
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BR9005371A (pt) * 1990-10-18 1992-06-16 Metal Leve Sa Processo de fabricacao de embolo com galeria de refrigeracao
BR9005370A (pt) * 1990-10-18 1992-06-16 Metal Leve Sa Processo de fabricacao de embolo refrigerado
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DE19910582A1 (de) * 1999-03-10 2000-09-28 Mahle Gmbh Gebauter Kolben
DE19926568A1 (de) * 1999-06-11 2000-12-14 Mahle Gmbh Gekühlter Kolben für Verbrennungsmotoren

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
EP0019323A1 (fr) * 1979-05-16 1980-11-26 Karl Schmidt Gmbh Piston pour moteurs à combustion interne
DE3707462A1 (de) * 1987-03-07 1988-09-15 Man B & W Diesel Gmbh Oelgekuehlter, mehrteiliger tauchkolben fuer brennkraftmaschinen

Also Published As

Publication number Publication date
KR20050057575A (ko) 2005-06-16
US20040055460A1 (en) 2004-03-25
CN1685141A (zh) 2005-10-19
BR0314788B1 (pt) 2012-09-04
EP1546534A1 (fr) 2005-06-29
JP2006500506A (ja) 2006-01-05
HK1078915A1 (zh) 2006-03-24
US6789460B2 (en) 2004-09-14
BR0314788A (pt) 2005-07-26
WO2004029440A1 (fr) 2004-04-08
DE10244511A1 (de) 2004-04-15
CN100390395C (zh) 2008-05-28

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