EP1546535B1 - Piston refroidi compose de plusieurs parties pour moteur a combustion interne - Google Patents

Piston refroidi compose de plusieurs parties pour moteur a combustion interne Download PDF

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Publication number
EP1546535B1
EP1546535B1 EP03769200A EP03769200A EP1546535B1 EP 1546535 B1 EP1546535 B1 EP 1546535B1 EP 03769200 A EP03769200 A EP 03769200A EP 03769200 A EP03769200 A EP 03769200A EP 1546535 B1 EP1546535 B1 EP 1546535B1
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EP
European Patent Office
Prior art keywords
piston
pistons
fact
holes
accordance
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
EP03769200A
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German (de)
English (en)
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EP1546535A1 (fr
Inventor
Peter Kemnitz
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
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Filing date
Publication date
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Application filed by Mahle GmbH filed Critical Mahle GmbH
Publication of EP1546535A1 publication Critical patent/EP1546535A1/fr
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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 
    • F02F3/16—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
    • F02F3/003—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 
    • F02F3/0084—Pistons  the pistons being constructed from specific materials
    • 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 according to the preamble of claim 1.
  • a multi-part cooled piston for an internal combustion engine is 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.
  • a pendulum piston which consists of a piston body with a piston upper part and formed thereon with pin bosses and a separate shaft part, which is connected by means of piston pin with the piston body.
  • the pendulum piston has an annular cooling channel, which is bounded partly by the upper piston part and partly by the shaft part, and also has no technical features that improve the cooling effect of flowing in the cooling channel cooling oil.
  • the invention is therefore based on the object to provide a multi-part cooled piston, which is inexpensive to produce with a sufficient dimensional stability and a cooling system with improved cooling effect.
  • 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 a kind of chamber formation in the cooling channel, d. h., A generation of shaker chambers, whereby an extension of the residence time of the cooling oil and thus an 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 (upper, towards the piston head) part of a cooling channel 7 and a piston lower part 2, the (lower, the piston shaft 9 out ) Part of a cooling channel 7, a piston shaft 9 and hub supports 6, as shown 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 is at most half the total height H of the cooling channel 7, so that an unhindered cooling oil circuit is ensured.
  • 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 distribution can be designed such that in pressure-back pressure direction D, GD of the piston 20, a larger number of holes 14 and thus support ribs 8 is arranged, as transverse to it, ie, a single-ended circumferential distribution in Cooling channel 7 takes place.
  • the distribution of the bores 14 and thus of the support ribs 8 in the cooling channel 7 when it is characterized according to the quadrant formed by the piston main axes K H I - IV be such that within a quadrant a symmetric ( Figure 6 ) or unbalanced distribution (not shown) is provided, which in the opposite quadrant, ie I. and III. or II. and IV., finds again.
  • 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 pointing in the direction of the combustion bowl 3.
  • 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 the lower piston part 2 are permanently connected to each other via the supporting and annular ribs 10 and 5 by means of a welding or soldering process, subsequently finishing the piston 20 to a piston which can be used in a motor by means of machining.
  • the upper piston part 1 is advantageously made 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.
  • the outer piston wall regions between two piston parts 1 and 2 form a bearing surface, which is characterized by a few tenths of a millimeter wide gap 13. This can remain open or be sealed by means of a temperature-resistant sealing ring, which is positioned before joining both piston parts 1 and 2 on one of the bearing surfaces, for example, the piston lower part 2.

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  • 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)

Abstract

L'invention concerne un piston (20) refroidi composé de plusieurs parties pour un moteur à combustion interne. Ce piston comprend une partie supérieure (1) en acier, dotée d'une cavité de combustion (3) et d'une paroi annulaire (4) avec une partie segments (11), et une partie inférieure (2) comportant un fût de piston (9) en caisson, un moyeu (12) pour recevoir l'axe reliant le piston (20) à la bielle ainsi que les supports de moyeu (6) associés au fût de piston (9). L'invention vise à fabriquer ce piston de manière rentable en lui conférant une grande stabilité de forme et un système de refroidissement amélioré. A cet effet, une conduite de refroidissement (7) façonnée dans la partie supérieure (1) du piston comporte des orifices (14) répartis sur sa périphérie et orientés vers la tête de piston, le matériau du piston situé entre ces orifices (14) forme des nervures-supports (8) qui, dans le sens radial à l'axe longitudinal du piston (K), constituent des parties d'une nervure circulaire (5). La partie inférieure (2) du piston comprend une rainure portante (10) annulaire périphérique associée aux supports de moyeu (6). La partie supérieure (1) et la partie inférieure (2) du piston sont assemblées de manière non libérable au moyen de la nervure circulaire et de la rainure portante (5, 10).

Claims (9)

  1. Piston refroidi (20) constitué de plusieurs pièces pour un moteur à combustion interne, avec une partie supérieure de piston (1) en acier forgé, qui comprend une cavité de combustion (3) dans le corps de piston et une paroi annulaire (4) pourvue d'une partie annulaire (11), et avec une partie inférieure de piston (2), qui comprend une jupe de piston (9), des moyeux (12) servant à loger l'axe de piston reliant le piston (20) à la bielle ainsi que des supports de moyeux (6) reliés à la jupe de piston (9), dans lequel un canal de refroidissement (7) est formé à travers la partie supérieure de piston (1) et la partie inférieure de piston (2) et est délimité par celles-ci dans sa section transversale, dans lequel la partie supérieure de piston (1) présente une nervure annulaire périphérique (5) délimitée par la paroi intérieure du canal de refroidissement et la partie inférieure de piston (2) présente une nervure de support (10) annulaire périphérique reliée aux supports de moyeux (6), et dans lequel la partie supérieure de piston (1) et la partie inférieure de piston (2) sont reliées de manière inamovible au moyen de la rainure annulaire (5) et de la rainure de support (10),
    caractérisé en ce que
    - le canal de refroidissement (7) formé dans la partie supérieure de piston (1) présente sur sa périphérie des alésages (14) orientés vers le fond de piston, dans lequel le matériau de piston présent entre les alésages (14) forme des nervures d'appui (8), qui forment dans le sens radial à l'axe longitudinal de piston (K) respectivement des sections de la nervure annulaire périphérique (5), et
    - en ce que la paroi annulaire (4) délimitant le canal de refroidissement (7) forme un interstice (13) avec la partie inférieure de piston (2) sur sa section transversale de paroi.
  2. Piston (20) selon la revendication 1, caractérisé en ce que les alésages (14) sont répartis de manière symétrique et/ou non symétrique dans le sens radial sur la périphérie du canal de refroidissement (7).
  3. Piston (20) selon les revendications 1 et 2, caractérisé en ce que les alésages (14) présentent une profondeur (hB) qui représente au maximum la moitié de la hauteur totale (H) du canal de refroidissement (7).
  4. Piston (20) selon les revendications 1 à 3, caractérisé en ce qu'au moins une partie des axes des alésages (14) sont parallèles à l'axe longitudinal de piston (K).
  5. Piston (20) selon la revendication 4, caractérisé en ce que les axes des alésages (14) s'étendent selon un angle aigu par rapport à l'axe longitudinal de piston (K).
  6. Piston (20) selon la revendication 5, caractérisé en ce que les alésages (14) présentent une forme cylindrique ou une forme de trou ovale.
  7. Piston (20) selon la revendication 1, caractérisé en ce qu'un élément étanche (15) est agencé dans l'interstice (13).
  8. Piston (20) selon la revendication 1, caractérisé en ce que la liaison inamovible des parties supérieure et inférieure de piston (1, 2) est une liaison par soudage ou brasée.
  9. Piston (20) selon la revendication 1, caractérisé en ce que la partie supérieure de piston (1) se compose d'un matériau résistant à l'oxydation et/ou thermostable et la partie inférieure de piston (2) se compose d'un acier ferritique-perlitique ou d'un acier de traitement à durcissement par précipitation.
EP03769200A 2002-09-25 2003-09-19 Piston refroidi compose de plusieurs parties pour moteur a combustion interne Expired - Lifetime EP1546535B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10244512 2002-09-25
DE10244512A DE10244512A1 (de) 2002-09-25 2002-09-25 Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
PCT/DE2003/003114 WO2004029442A1 (fr) 2002-09-25 2003-09-19 Piston refroidi compose de plusieurs parties pour moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1546535A1 EP1546535A1 (fr) 2005-06-29
EP1546535B1 true EP1546535B1 (fr) 2011-08-31

Family

ID=31502554

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Application Number Title Priority Date Filing Date
EP03769200A Expired - Lifetime EP1546535B1 (fr) 2002-09-25 2003-09-19 Piston refroidi compose de plusieurs parties pour moteur a combustion interne

Country Status (8)

Country Link
US (1) US6698391B1 (fr)
EP (1) EP1546535B1 (fr)
JP (1) JP2006500505A (fr)
KR (1) KR20050057574A (fr)
CN (1) CN100353046C (fr)
BR (1) BR0314963B1 (fr)
DE (1) DE10244512A1 (fr)
WO (1) WO2004029442A1 (fr)

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JP6401188B2 (ja) 2013-02-18 2018-10-03 フェデラル−モーグル・リミテッド・ライアビリティ・カンパニーＦｅｄｅｒａｌ−Ｍｏｇｕｌ Ｌｌｃ 鋳造金属または粉末金属プロセスによって作られたピストンクラウンを有する複雑な形状のピストンオイルギャラリ
JP6359129B2 (ja) * 2014-07-02 2018-07-18 カーエス コルベンシュミット ゲゼルシャフト ミット ベシュレンクテル ハフツングＫＳ Ｋｏｌｂｅｎｓｃｈｍｉｄｔ ＧｍｂＨ 素材結合により接合されるクーリングチャンネル付きピストンにおける間隙幾何学形状
US10184422B2 (en) 2014-12-30 2019-01-22 Tenneco Inc. Reduced compression height dual gallery piston, piston assembly therewith and methods of construction thereof
US10247132B2 (en) * 2015-01-30 2019-04-02 Tenneco Inc. Piston with sealed cooling gallery and method of construction thereof
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EP3452712B1 (fr) 2016-05-04 2024-11-20 KS Kolbenschmidt GmbH Piston
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Also Published As

Publication number Publication date
KR20050057574A (ko) 2005-06-16
BR0314963B1 (pt) 2012-08-21
US6698391B1 (en) 2004-03-02
WO2004029442A1 (fr) 2004-04-08
EP1546535A1 (fr) 2005-06-29
HK1078917A1 (zh) 2006-03-24
DE10244512A1 (de) 2004-04-15
JP2006500505A (ja) 2006-01-05
CN100353046C (zh) 2007-12-05
CN1685143A (zh) 2005-10-19
BR0314963A (pt) 2005-08-02

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