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EP3262289A1 - Piston de moteur à combustion interne - Google Patents

Piston de moteur à combustion interne

Info

Publication number
EP3262289A1
EP3262289A1 EP16706855.0A EP16706855A EP3262289A1 EP 3262289 A1 EP3262289 A1 EP 3262289A1 EP 16706855 A EP16706855 A EP 16706855A EP 3262289 A1 EP3262289 A1 EP 3262289A1
Authority
EP
European Patent Office
Prior art keywords
piston
cooling oil
cooling
cooling channel
piston according
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Withdrawn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
EP16706855.0A
Other languages
German (de)
English (en)
Inventor
Joachim Schmidt
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 EP3262289A1 publication Critical patent/EP3262289A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/10—Cooling by flow of coolant through 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 
    • F02F3/16—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 piston for an internal combustion engine having a piston head and a piston skirt, having a arranged in the piston head, annular grooves for receiving piston rings having circumferential annular portion and a piston head in the amount of the annular portion circumferential cooling channel having inlet openings and drain holes for cooling oil.
  • the object of the present invention is to further develop a generic piston so that improved cooling is achieved by means of cooling oil.
  • the solution is that at least in the region of an inlet opening for cooling oil, a cavity for receiving cooling oil is provided, which opens into the cooling channel.
  • the piston according to the invention is characterized in that an additional shaker effect is achieved in the region of at least one inlet opening for cooling oil, since the cooling oil can move freely in the cavity provided according to the invention and is moved up and down in the cavity during engine operation due to the stroke movement of the piston , This results in an improved heat transfer from Piston head in the direction of the piston skirt, where the heat is dissipated over a large area.
  • the height (H) of the cavity and the height (h) of the cooling channel in the ratio 5: 2 are formed to each other to obtain an optimally improved heat transfer.
  • a further advantageous development provides that the cross-sectional area (Q) of the cavity and the cross-sectional area (q) of the cooling channel in the ratio 4: 1, 2 to 4: 1, 5 are formed to each other. Also with this measure, an optimized heat transfer is achieved.
  • the piston according to the invention advantageously has a pressure side (DS) and a counter-pressure side (GDS), wherein an inlet opening for cooling oil in the region of the pressure side (DS) and the counter-pressure side (GDS) is provided. If both inlet openings are provided with a cavity according to the invention, the heat generated during engine operation is removed even more efficiently.
  • the cooling channel may have additional bores and / or ribs for controlling the residence time of the cooling oil accommodated in the cooling channel.
  • the compression height KH of the piston according to the invention is preferably 30 to 35 mm, preferably 32 mm, so that such a piston is suitable for use in motor racing.
  • the piston according to the invention is preferably designed as a box piston for reasons of weight savings.
  • those in the piston skirt provided with hub bores equipped piston hubs be provided with support ribs in order to increase the rigidity of the piston in itself.
  • the piston according to the invention is preferably made of a material based on aluminum in order to further reduce the moving mass of the piston during engine operation.
  • the piston according to the invention can be produced from a piston upper part and a piston lower part in order to optimally adapt the selection of suitable materials to the loads of the piston during engine operation.
  • the piston upper part and the piston lower part are preferably firmly connected to one another by means of a high-temperature-resistant adhesive based on epoxy or ceramic.
  • the joining seam between the upper piston part and the lower piston part is preferably arranged between the first annular groove and the second annular groove of the annular part.
  • Figure 1 shows an embodiment of a piston according to the invention in
  • Figure 2 is a section along the line II - II in Figure 1;
  • Figure 3 is a section along the line III - III in Figure 1;
  • FIG. 4 shows a plan view of the piston according to FIG. 1.
  • Figures 1 to 4 show an embodiment of a piston 10 according to the invention.
  • the piston 10 is formed in the embodiment as a box piston.
  • the piston 10 has a piston head 1 1 with a piston head 12, a combustion bowl 13, a circumferential top land 14 and a circumferential ring portion 15 with annular grooves 16 a, 16 b, 16 c for receiving piston rings (not shown).
  • a circumferential cooling channel 17 is provided in the amount of the ring section .
  • the piston 10 also has a piston shaft 18, which is provided in known manner with piston hubs 19, in which hub bores 21 for receiving a piston pin (not shown) are introduced.
  • the piston hubs 19 are connected to each other via running surfaces 22a, 22b.
  • the illustrated embodiment of the piston 10 according to the invention has in its inner space 10a on its pressure side DS and its counter-pressure side GDS, which are defined by its running surfaces 22a, 22b, depending on a cavity 24a, 24b.
  • Each cavity 24a, 24b is provided with an inlet opening 23a, 23b for cooling oil (see FIG.
  • Each cavity 24a, 24b projects into the interior 10a of the piston 10 in the direction of the piston bosses 19 and opens in the region of the piston head 1 1 in the circumferential cooling channel 17.
  • each cavity 24a, 24b and the inner wall of its associated tread 22a, 22b form a feed hopper 25a, 25b for cooling oil, which opens via the corresponding inlet opening 23a, 23b in the respective cavity 24a, 24b (see Figure 1).
  • the cavities 24a, 24b act as shaker spaces, in which the cooling oil is moved up and down in known manner ("shaker effect"), resulting in improved heat removal from the region of the piston head 1 1 in the direction the piston stem 18, where the heat is dissipated via the raceways 22a, 22b.
  • each cavity 24a, 24b and the height h of the cooling channel 17 is approximately 5: 2 to each other.
  • the cross-sectional area (Q) of each cavity 24a, 24b and the cross-sectional area (q) of the cooling channel 17 are formed in the embodiment approximately in the ratio 4: 1, 35.
  • the cooling channel 17 of the illustrated embodiment of a piston according to the invention has, in a manner known per se, drain openings 26 for cooling oil, through which the cooling oil is directed in the direction of the interior 10a of the piston 10.
  • the cooling channel 17 of the illustrated embodiment of a piston 10 according to the invention also has, in a conventional manner, additional bores 27 and ribs 28 for controlling the residence time of the cooling oil received in the cooling passage 17 during engine operation.
  • the embodiment of the piston 10 according to the invention shown in the figures is formed from a piston upper part 31 and a piston lower part 32, preferably made of a material based on aluminum and fixed by means of a high temperature resistant (up to 300 ° C) adhesive based on epoxy resins or ceramics connected with each other.
  • the joining seam 34 between the upper piston part 31 and the lower piston part 32 is arranged in the exemplary embodiment between the first annular groove 16a and the second annular groove 16b.
  • the piston 10 has in the embodiment a compression height KH of 32 mm and is suitable in this embodiment for use in motor racing.
  • the piston hubs 19 have support ribs 33 in the region of the hub bores 21.
  • the support ribs 33 support the piston head 1 1 in the region below its ring portion 15 relative to the piston boss 19, such that the risk of deformation of the piston head 1 1 in the region of its ring portion 15 during engine operation is at least reduced.

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

La présente invention concerne un piston (10) d'un moteur à combustion interne, comprenant une tête de piston (11) et une jupe de piston (18), une partie annulaire (15) circonférentielle présentant, dans la tête de piston (11), des gorges circulaires (16a, 16b, 16c) destinées au logement des segments de piston et, dans la tête de piston (11), un canal de refroidissement (17) circonférentiel au niveau de la partie annulaire (15), ledit canal de refroidissement présentant des orifices d'entrée (23a, 23b) et des orifices de sortie (26, 27) destinés à l'huile de refroidissement. Selon l'invention, au moins dans la zone d'un orifice d'entrée (23a, 23b) destiné à l'huile de refroidissement, un espace vide (24a, 24b) destiné à recevoir l'huile de refroidissement aboutit dans le canal de refroidissement (17).
EP16706855.0A 2015-02-26 2016-02-26 Piston de moteur à combustion interne Withdrawn EP3262289A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015002322.5A DE102015002322A1 (de) 2015-02-26 2015-02-26 Kolben für einen Verbrennungsmotor
PCT/EP2016/054104 WO2016135301A1 (fr) 2015-02-26 2016-02-26 Piston de moteur à combustion interne

Publications (1)

Publication Number Publication Date
EP3262289A1 true EP3262289A1 (fr) 2018-01-03

Family

ID=55443246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16706855.0A Withdrawn EP3262289A1 (fr) 2015-02-26 2016-02-26 Piston de moteur à combustion interne

Country Status (5)

Country Link
US (1) US20180038265A1 (fr)
EP (1) EP3262289A1 (fr)
JP (1) JP2018507977A (fr)
DE (1) DE102015002322A1 (fr)
WO (1) WO2016135301A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018100336A1 (de) * 2018-01-09 2019-07-11 Man Truck & Bus Ag Kolben für eine Brennkraftmaschine
US20190264633A1 (en) * 2018-02-28 2019-08-29 Tenneco Inc. Dual gallery two stroke piston
CN111502856A (zh) * 2020-04-30 2020-08-07 上海建桥学院 一种柴油机活塞头及其数控加工工艺
CN114251152B (zh) 2020-09-22 2022-12-20 马勒汽车技术（中国）有限公司 内燃机的销连接副的润滑机构

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2238372A5 (fr) * 1973-07-19 1975-02-14 Dampers
DE3403624A1 (de) * 1984-02-02 1985-08-08 Kolbenschmidt AG, 7107 Neckarsulm Gebauter, fluessigkeitsgekuehlter kolben fuer brennkraftmaschinen
JPH0942052A (ja) * 1995-08-02 1997-02-10 Komatsu Ltd スカート給油型ピストン
FI106396B (fi) * 1998-11-19 2001-01-31 Wecometal Oy Polttomoottorin mäntä
BR0304869A (pt) * 2002-05-15 2004-08-17 Deltahawk Inc Pistão de lubrificação de pino de êmbolo e resfriado por lubrificante
DE10244511A1 (de) * 2002-09-25 2004-04-15 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
US7406941B2 (en) * 2004-07-21 2008-08-05 Federal - Mogul World Wide, Inc. One piece cast steel monobloc piston
DE102004057558A1 (de) * 2004-11-30 2006-06-01 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102006013884A1 (de) * 2006-03-25 2007-09-27 Mahle International Gmbh Kolben für einen Verbrennungsmotor
US20120304956A1 (en) * 2011-06-06 2012-12-06 Kai Wang Piston with weld hardened ring groove and method of construction thereof
US8739755B2 (en) * 2011-10-24 2014-06-03 Mahle International Gmbh Piston for an internal combustion engine
DE102012017217A1 (de) * 2012-08-31 2014-05-15 Mahle International Gmbh Kolben für einen Verbrennungsmotor

Also Published As

Publication number Publication date
US20180038265A1 (en) 2018-02-08
DE102015002322A1 (de) 2016-09-01
JP2018507977A (ja) 2018-03-22
WO2016135301A1 (fr) 2016-09-01

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