EP0855499B1 - Piston refroidi par un liquide - Google Patents

Piston refroidi par un liquide Download PDF

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Publication number
EP0855499B1
EP0855499B1 EP98100989A EP98100989A EP0855499B1 EP 0855499 B1 EP0855499 B1 EP 0855499B1 EP 98100989 A EP98100989 A EP 98100989A EP 98100989 A EP98100989 A EP 98100989A EP 0855499 B1 EP0855499 B1 EP 0855499B1
Authority
EP
European Patent Office
Prior art keywords
piston
coolant
openings
channel
liquid
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
EP98100989A
Other languages
German (de)
English (en)
Other versions
EP0855499A1 (fr
Inventor
Stephan Thieme
Edgar Martin
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.)
Federal Mogul Nuernberg GmbH
Original Assignee
Federal Mogul Nuernberg 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 Federal Mogul Nuernberg GmbH filed Critical Federal Mogul Nuernberg GmbH
Publication of EP0855499A1 publication Critical patent/EP0855499A1/fr
Application granted granted Critical
Publication of EP0855499B1 publication Critical patent/EP0855499B1/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 
    • F02F3/16—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 invention relates to a liquid-cooled piston for Internal combustion engines.
  • the pistons of internal combustion engines are due to the in the Combustion chamber takes place high thermal burns Subjected to loads. Here it is particularly at Diesel engines and supercharged engines conveniently Cooling of the pistons by the supply of coolant To ensure voids in the piston.
  • DE 34 44 661 A1 describes a liquid-cooled piston known that several in addition to an annular coolant channel Has blind holes that are from the annular Branch off the coolant duct in the direction of the piston crown. Furthermore, several are arranged radially in a star shape extending coolant channels formed, and in The intersection of these coolant channels is a drain opening intended. There is thus also for this known piston the disadvantage that the coolant in that area after drains below, which is the highest thermal load is subjected, so that the cooling is insufficient. Further has the described arrangement of coolant channels very complicated shape, so that this piston only with an undesirable amount of effort and extremely complicated, multi-armed casting cores can be produced. This disadvantage remains in particular also for an embodiment of the DE 34 44 661 A1 known piston, in which Crossing point of the radially extending coolant channels none Drain opening is formed.
  • the prior art known liquid-cooled pistons is the present Invention, the object of a liquid-cooled To create pistons for an internal combustion engine, in which a sufficient cooling of the piston in all areas is guaranteed, and in addition at a low Manufacturing effort to manufacture and with a low Installation effort is to be installed.
  • two ring segment-shaped formed in an upper piston part Coolant channels are provided, each with respect to a Piston pin axis symmetrical point for coolant supply and openings to the coolant drain to a crankcase have.
  • Piston pin axis the advantage that when installing the Do not pay attention to the orientation of the piston got to.
  • are in the segment of a ring Coolant channels at locations related to the Piston pin axis are arranged symmetrically, openings provided, and the areas of the openings are through the radially extending connecting channel connected to each other.
  • the piston is consequently symmetrical to the piston pin axis trained, and each of the ring segment-shaped Coolant channels formed openings can be used as a or used as a drain hole.
  • each of the ring segment-shaped Coolant channels formed openings can be used as a or used as a drain hole.
  • the coolant is drained from the Piston according to the invention in no way in a medium Area of the piston, the particularly high thermal Is subject to loads.
  • Through the flow of the Coolant through the connection channel below the The combustion chamber trough is appropriately discharged to the Pistons transfer heat, and the coolant is in one Marginal area drained, which to a lesser extent anyway is subject to thermal stress. This allows in expediently always sufficient heat dissipation respectively.
  • connecting channel it is preferred that this at least is inclined in some areas.
  • Design of the connecting channel can be advantageous an adaptation of the course of the connecting channel to the shape the combustion chamber trough or the piston crown as a whole.
  • connection channel can its course to the bottom one in the piston crown trained combustion bowl can be adjusted.
  • This Measure can be a particularly reliable cooling of the piston in the particularly heated area of the combustion chamber trough respectively.
  • the connecting channel can be special be brought close to the piston crown for cooling to accomplish this area, at the same time the Coolant supply to the bottom of the Connection channel, in the area of the ring segment Cooling channels arranged openings in a simple manner can be guaranteed.
  • each provided deflection devices are a coolant jet directed at the opening depending on the stroke height of the piston in the cylinder the ring segment-shaped coolant channels or Connection channel distracts.
  • the described Deflection device is, for example, a rib-like projection that in the area of the opening bottom, that is, the zone closest to the piston crown, is trained.
  • FIG. 1 is a schematic Top view of the piston 10 according to the invention the course of the Coolant channels shown.
  • outer half of the upper piston part of the Piston 10 each have a ring segment-shaped coolant channel 12a and 12b trained.
  • Coolant channels 12a and 12b are diametrically opposite one another on two opposite, symmetrical to the piston pin axis 14
  • In the 1 are the mouths of the openings 16a, 16b and 18 drawn in dashed lines.
  • this connecting channel 20 is in its Course not open to the crankcase. Rather, the Connection channel 20 only in the area of the openings 16a, 16b and 18 with the ring segment-shaped channels 12a and 12b in Connection. As a result, the coolant is supplied via a of the two openings 16a and 16b each in the ring segment-shaped coolant channels 12a, 12b or over the Opening 18 in the connecting channel 20.
  • the coolant that enters the connection channel 20 cools due to the heat transfer from the surrounding areas of the Piston upper part, which is below the piston crown and in particular in the area of the combustion chamber trough Zones of the piston.
  • the coolant is drained through the other opening 18.
  • the Pistons through the corresponding arrangement of the openings 16a, 16b and the connecting channel 20 to the piston pin axis 14 completely symmetrical, so that the installation of the piston is simplified can not be by the orientation of the piston 10 must be observed.
  • connection channel 20 in the area of the openings 16a, 16b, 18, of which only the Openings 16a and 18 are shown, with (not in Fig. 2 shown) is connected to ring segment-shaped channel 12a, extends upwards from the area of the opening 18, inclined in the direction of the piston crown 24 and is thereby on adapted the shape of the combustion chamber trough 22.
  • the piston crown 24 is in a central section is comparatively minor except while the recess towards the edge areas becomes larger to form an annular combustion chamber trough.
  • the connecting channel 20 is from the edge region rising towards the middle of the piston educated. Due to the symmetrical shape of the The combustion chamber trough 22 also runs to the connecting channel 20 Piston pin axis symmetrical, so that there is largely roof-like course of the connecting channel 20 sets.
  • connection channel 20 from the combustion chamber trough 22 Due to the comparatively small distance of the Connection channel 20 from the combustion chamber trough 22 can thereby good heat dissipation can be ensured.
  • connection channel 20 Due to the comparatively small distance of the Connection channel 20 from the combustion chamber trough 22 can thereby good heat dissipation can be ensured.
  • Deflection devices 26 in the form of a rounded projection or a rib. Due to the lifting height of the piston 10 in the Cylinder bushing provide these deflectors 26 on the the coolant jet (not shown) strikes for one Deflection of the coolant jet as shown in FIG Fig. 3 in the left or right ring segment-shaped Coolant channel 12a, 12b or in the connecting channel 20 (where, as already mentioned, the right ring segment Coolant channel 12b is not shown).
  • the Deflection devices 26 are each at the bottom of the opening 16a, 16b, 18, that is to say on the opposite of the coolant inlet Side of the opening 16a, 16b, 18 formed and have the dashed lines in Fig. 1 in Fig. 1 drawn shape.
  • opening 16a, 16b, 18, which ensures that the oil is drained obstructs the corresponding rib 26 the outflow of the cooling oil so that the Piston 10 according to the invention can be designed symmetrically and can be installed in any orientation in order for the opening 16a, 16b, 18 used as the inlet opening to use advantageous effect of the ribs 26.

Landscapes

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

Claims (6)

  1. Piston refroidi par un liquide (10), destiné aux moteurs à combustion interne, avec :
    au moins un conduit (12a, 12v) à liquide de refroidissement en forme de segment annulaire, conçu dans une partie supérieure du piston, possédant, dans des régions symétriques à un axe de l'arbre du piston (14) des orifices (16a, 16b) pour l'introduction du liquide de refroidissement et pour l'évacuation du liquide de refroidissement vers un compartiment à vilebrequin et
    un conduit de liaison (20), fermé dans son trajet vers le compartiment à vilebrequin, s'étendant de manière pratiquement radiale, et relié aux conduits en forme de segments annulaires (12a, 12b), dans la région des orifices (16a, 16 b, 18).
  2. Piston refroidi par un liquide, destiné aux moteurs à combustion interne, selon la revendication 1, caractérisé en ce que le conduit de liaison (20) présente des inclinaisons au moins dans certaines zones.
  3. Piston refroidi par un liquide, destiné aux moteurs à combustion interne, selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le conduit de liaison (20) est conçu de manière adaptée à son trajet le long du fond d'une cavité (22) du compartiment de combustion, qui est formée dans un fond du piston.
  4. Piston refroidi par liquide, destiné aux moteurs à combustion interne, selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le conduit de liaison (20) s'étend en majeure partie au-dessus du niveau des conduits (12a, 12b) à liquide de refroidissement en forme de segments annulaires.
  5. Piston refroidi par liquide, destiné aux moteurs à combustion interne, selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que, dans la région des orifices (16a, 16b, 18) des conduits à liquide de refroidissement (12a, 12b, 20) est prévu respectivement un dispositif de déviation (26), qui dévie un jet de liquide de refroidissement dirigé sur les orifices (16a, 16b, 18), en fonction d'une hauteur de levée du piston (10), dans un cylindre de l'un des deux conduits (12a, 12b) à liquide de refroidissement en forme de segment annulaire ou dans le conduit de liaison (20).
  6. Piston refroidi par liquide, destiné aux moteurs à combustion interne, selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que les sections des conduits à liquide de refroidissement (12a, 12b, 20) sont conçues de manière à s'élargir, à une distance des orifices (16a, 16b, 18).
EP98100989A 1997-01-28 1998-01-21 Piston refroidi par un liquide Expired - Lifetime EP0855499B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19703001 1997-01-28
DE19703001A DE19703001C2 (de) 1997-01-28 1997-01-28 Flüssigkeitsgekühlter Kolben

Publications (2)

Publication Number Publication Date
EP0855499A1 EP0855499A1 (fr) 1998-07-29
EP0855499B1 true EP0855499B1 (fr) 2002-04-03

Family

ID=7818556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98100989A Expired - Lifetime EP0855499B1 (fr) 1997-01-28 1998-01-21 Piston refroidi par un liquide

Country Status (3)

Country Link
US (1) US5890416A (fr)
EP (1) EP0855499B1 (fr)
DE (2) DE19703001C2 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747746C1 (de) * 1997-10-29 1998-11-19 Alcan Gmbh Gekühlter Kolben für Verbrennungskraftmaschinen und Verbrennungskraftmaschinen mit derartigen Kolben
DE19903278A1 (de) 1999-01-28 2000-08-03 Mahle Gmbh Leichter Kastenkolben
DE19953384C1 (de) * 1999-11-06 2001-01-18 Federal Mogul Wiesbaden Gmbh Kolben
JP4686098B2 (ja) * 2000-03-23 2011-05-18 ピヴォタル エンジニアリング リミテッド 内燃機関のためのピストン
US6494170B2 (en) 2000-12-01 2002-12-17 Caterpillar Inc Two-piece piston assembly with skirt having pin bore oil ducts
DE102004043720A1 (de) * 2004-09-09 2006-03-30 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor sowie Verbrennungsmotor
DE102004056769A1 (de) * 2004-11-24 2006-06-01 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor und Kombination eines Kolbens mit einer Öleinspritzanordnung
DE202006020280U1 (de) * 2006-11-28 2008-02-21 Ks Kolbenschmidt Gmbh Kühlkanalkolben
DE102008002571A1 (de) * 2008-06-20 2009-12-31 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor
DE102008038324A1 (de) * 2008-08-19 2010-02-25 Mahle International Gmbh Kühlkanal eines Kolbens für einen Verbrennungsmotor
DE102009001888C5 (de) 2009-03-26 2019-12-24 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor
US9970384B2 (en) * 2009-11-06 2018-05-15 Federal-Mogul Llc Steel piston with cooling gallery and method of construction thereof
DE102009056922B4 (de) * 2009-12-03 2019-03-14 Mahle International Gmbh Zulauftrichter für den Kühlkanal eines Kolbens
DE102013013962A1 (de) 2013-08-23 2015-02-26 Mahle International Gmbh Baueinheit aus einem Kolben und einer Anspritzdüse für einen Verbrennungsmotor
KR101912764B1 (ko) * 2016-05-02 2018-10-29 동양피스톤 주식회사 내연 기관용 피스톤 및 냉각 채널 코어
GB2578803B (en) * 2019-04-04 2020-12-16 Cox Powertrain Ltd Marine outboard motor with piston cooling gallery

Family Cites Families (15)

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Publication number Priority date Publication date Assignee Title
DE150542C (fr) *
US1547687A (en) * 1922-07-07 1925-07-28 Fried Krupp Germaniawerft Ag Cooled composite piston for internal-combustion engines
FR1244830A (fr) * 1959-02-03 1960-10-28 Mahle Kg Piston en métal léger avec canaux de refroidissement et son procédé de fabrication
DE1207152B (de) * 1959-10-02 1965-12-16 Schmidt Gmbh Karl Fluessigkeitsgekuehlter Kolben geschmiedeter oder gepresster Ausfuehrung fuer Brennkraftmaschinen
DE1905609A1 (de) * 1969-02-05 1970-08-20 Schmidt Gmbh Karl Fluessigkeitsgekuehlter Kolben fuer Brennkraftmaschinen
DE2919638A1 (de) * 1979-05-16 1980-11-20 Schmidt Gmbh Karl Kolben fuer brennkraftmaschinen
IT1118774B (it) * 1979-06-12 1986-03-03 Ass Eng Italia Perfezionamento relativo aglistantuffi nei motori diesel
JPS5943944A (ja) * 1982-09-07 1984-03-12 Toyota Motor Corp オイル冷却ピストン
DE3403624A1 (de) * 1984-02-02 1985-08-08 Kolbenschmidt AG, 7107 Neckarsulm Gebauter, fluessigkeitsgekuehlter kolben fuer brennkraftmaschinen
JPS60192860A (ja) * 1984-03-14 1985-10-01 Toyota Motor Corp 内燃機関用ピストン
DE3444661A1 (de) * 1984-12-07 1986-06-12 Klöckner-Humboldt-Deutz AG, 5000 Köln Fluessigkeitsgekuehlter kolben
DD267084A1 (de) * 1987-12-07 1989-04-19 Schwermasch Liebknecht Veb K Gebauter fluessigkeitsgekuehlter kolben mit spritzoelzufuhr
DE4340891A1 (de) * 1993-12-01 1995-06-08 Mahle Gmbh Hubkolben für Verbrennungsmotoren aus insbesondere Leichtmetall
DE19618625C1 (de) * 1996-05-09 1997-10-23 Daimler Benz Ag Flüssigkeitsgekühlter Kolben für Verbrennungsmotoren
BR9601862A (pt) * 1996-06-20 1999-08-03 Metal Leve Sa Pistão para motor de combustão interna

Also Published As

Publication number Publication date
US5890416A (en) 1999-04-06
DE59803581D1 (de) 2002-05-08
DE19703001C2 (de) 1998-12-03
DE19703001A1 (de) 1998-08-27
EP0855499A1 (fr) 1998-07-29

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