EP1063409B1 - Piston for an internal combustion engine - Google Patents

Piston for an internal combustion engine Download PDF

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Publication number
EP1063409B1
EP1063409B1 EP00111733A EP00111733A EP1063409B1 EP 1063409 B1 EP1063409 B1 EP 1063409B1 EP 00111733 A EP00111733 A EP 00111733A EP 00111733 A EP00111733 A EP 00111733A EP 1063409 B1 EP1063409 B1 EP 1063409B1
Authority
EP
European Patent Office
Prior art keywords
inlet
piston
openings
cooling
outlet
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.)
Revoked
Application number
EP00111733A
Other languages
German (de)
French (fr)
Other versions
EP1063409A3 (en
EP1063409A2 (en
Inventor
Wolfgang Hanke
Gregor Müller
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.)
KS Kolbenschmidt GmbH
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7912487&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1063409(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Publication of EP1063409A2 publication Critical patent/EP1063409A2/en
Publication of EP1063409A3 publication Critical patent/EP1063409A3/en
Application granted granted Critical
Publication of EP1063409B1 publication Critical patent/EP1063409B1/en
Anticipated expiration legal-status Critical
Revoked 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 piston for an internal combustion engine with an annular arranged cooling channel, which has inlet and outlet openings, cooling oil through a cooling oil nozzle as a free oil jet via an inlet channel into the inlet opening and can thus be fed into the cooling channel and through at least one drain opening can be discharged via a drain channel.
  • Such a piston is known for example from DE 43 40 891 A1.
  • the cooling oil is connected to the motor housing by a cooling oil syringe from the crank chamber through the free interior of the piston through as free Oil jet injected into the inlet opening of the cooling channel.
  • the Cooling oil jet captured as well as possible at all piston stroke positions become.
  • there is a cooling oil inlet opening which is elongated in the passage cross section and an outlet opening is provided. Seen in the cooling channel level is the inlet opening with respect to one that runs through the inlet opening Center axis offset.
  • Such a piston has the disadvantage that in engines with mutually arranged Cooling oil nozzles two piston designs (one design with one after inlet opening offset on the right and a version with one offset to the left Inlet opening) must be used. This means a lot of effort.
  • the outlet opening has an elongated passage cross section the disadvantage that a high leakage oil flow and thus a reduced Cooling effect takes place.
  • the present invention is based on the object Improve pistons of the type described above so that it is universal is usable and inexpensive to manufacture and has an improved cooling effect having.
  • cooling channel has at least three openings, in which Cooling channel level seen from the one drain opening two mutually Inlet openings to be used are arranged such that the openings in Relative to a central axis extending through the drain opening arranged symmetrically are.
  • the piston is universal in engines with reciprocal arranged cooling nozzles can be used.
  • the piston can both for engines with parallel to the cylinder axis and with splashing inclined to it Cooling nozzles, as well as gasoline and diesel engines are used.
  • the Opening that cannot be supplied with cooling oil through a cooling nozzle serves as additional drain opening. This results in comparison to, for example slot-shaped drain opening an improved cooling effect.
  • a piston 1 has a ring-shaped arrangement in its piston head region Cooling channel 2 on.
  • This cooling channel 2 has two mutually usable inlet openings 3, 5, which are arranged symmetrically to the central axis and a drain opening 4.
  • These openings 3, 4, 5 are inlet and outlet channels 6, 7, 8, respectively assigned.
  • the channels 6, 7, 8 are advantageously rotationally symmetrical, the channels 6, 7, 8 at least in one facing away from the cooling channel Section 9 can be conical.
  • the diameter of the openings 3, 4, 5 can be approx. 1/25 to approx. 1/5 of the piston diameter.
  • the inlet and outlet channels 6, 7, 8 can be inclined up to approx. 15 ° with respect to the piston axis.
  • the openings 3, 4, 5 can be sharp-edged, chamfered or rounded his.
  • a cooling oil nozzle (not shown) is used Cooling oil is injected into the inlet channel 7 and thus into the inlet opening 3. The cooling oil arrives in the cooling channel 2 and can via the drain opening 4 and the associated drain channel 6 and via the opening 5 and the associated channel 8 drain.

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  • 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)
  • Lubrication Of Internal Combustion Engines (AREA)

Description

Die Erfindung betrifft einen Kolben für einen Verbrennungsmotor mit einem ringförmig angeordneten Kühlkanal, der Zulauf- und Ablauföffnungen aufweist, wobei Kühlöl durch eine Kühlöldüse als freier Ölstrahl über einen Zulaufkanal in die Zulauföffnung und damit in den Kühlkanal zuführbar ist und durch mindestens eine Ablauföffnung über einen Ablaufkanal abführbar ist.The invention relates to a piston for an internal combustion engine with an annular arranged cooling channel, which has inlet and outlet openings, cooling oil through a cooling oil nozzle as a free oil jet via an inlet channel into the inlet opening and can thus be fed into the cooling channel and through at least one drain opening can be discharged via a drain channel.

Ein derartiger Kolben ist beispielsweise aus der DE 43 40 891 A1 bekannt. Hierbei wird das Kühlöl durch eine fest mit dem Motorgehäuse verbundene Kühlölspritze vom Kurbelraum aus durch den freien Innenraum des Kolbens durch als freier Ölstrahl in die Zulauföffnung des Kühlkanals eingespritzt. Auf diese Weise soll der Kühlölstrahl bei sämtlichen Hubstellungen des Kolben möglichst gut aufgefangen werden. Dazu ist desweiteren eine im Durchtrittsquerschnitt langgestreckte Kühlölzulauföffnung und eine Auslaßöffnung vorgesehen. In der Kühlkanalebene gesehen ist dabei die Zulauföffnung hinsichtlich einer durch die Zulauföffnung verlaufenden Mittelachse versetzt angeordnet.Such a piston is known for example from DE 43 40 891 A1. in this connection the cooling oil is connected to the motor housing by a cooling oil syringe from the crank chamber through the free interior of the piston through as free Oil jet injected into the inlet opening of the cooling channel. In this way the Cooling oil jet captured as well as possible at all piston stroke positions become. In addition, there is a cooling oil inlet opening which is elongated in the passage cross section and an outlet opening is provided. Seen in the cooling channel level is the inlet opening with respect to one that runs through the inlet opening Center axis offset.

Ein derartiger Kolben weist den Nachteil auf, daß bei Motoren mit wechselseitig angeordneten Kühlöldüsen zwei Kolbenausführungen (eine Ausführung mit einer nach rechts versetzter Zulauföffnung und eine Ausführung mit einer nach links versetzten Zulauföffnung) eingesetzt werden müssen. Dies bedeutet einen hohen Aufwand. Zudem weist die einen langgestreckten Durchtrittsquerschnitt aufweisende Ablauföffnung den Nachteil auf, daß ein hoher Leckageöldurchfluß und damit eine verminderte Kühlwirkung stattfindet.Such a piston has the disadvantage that in engines with mutually arranged Cooling oil nozzles two piston designs (one design with one after inlet opening offset on the right and a version with one offset to the left Inlet opening) must be used. This means a lot of effort. In addition, the outlet opening has an elongated passage cross section the disadvantage that a high leakage oil flow and thus a reduced Cooling effect takes place.

Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, einen Kolben der vorstehend beschriebenen Art dahingehend zu verbessern, daß er universell einsetzbar und kostengünstig herzustellen ist und eine verbesserte Kühlwirkung aufweist.Proceeding from this, the present invention is based on the object Improve pistons of the type described above so that it is universal is usable and inexpensive to manufacture and has an improved cooling effect having.

Diese Aufgabe wird durch einen Kolben der genannten Art erfindungsgemäß dadurch gelöst, daß der Kühlkanal zumindest drei Öffnungen aufweist, wobei in der Kühlkanalebene gesehen der einen Ablauföffnung gegenüberliegend zwei wechselseitig zu nutzende Zulauföffnungen derart angeordnet sind, daß die Öffnungen in Bezug auf eine durch die Ablauföffnung verlaufende Mittelachse symmetrisch angeordnet sind.This object is achieved by a piston of the type mentioned according to the invention solved that the cooling channel has at least three openings, in which Cooling channel level seen from the one drain opening two mutually Inlet openings to be used are arranged such that the openings in Relative to a central axis extending through the drain opening arranged symmetrically are.

Auf diese Weise wird also erreicht, daß der Kolben universell bei Motoren mit wechselseitig angeordneten Kühldüsen eingesetzt werden kann. Dabei kann der Kolben sowohl bei Motoren mit parallel zur Zylinderachse als auch mit dazu geneigten spritzenden Kühldüsen, sowie bei Otto- und auch Dieselmotoren eingesetzt werden. Die Öffnung, die nicht durch eine Kühldüse mit Kühlöl versorgt werden kann, dient als zusätzliche Ablauflauföffnung. Dadurch ergibt sich im Vergleich zu einer beispielsweise langlochförmigen Ablauföffnung eine verbesserte Kühlwirkung.In this way it is achieved that the piston is universal in engines with reciprocal arranged cooling nozzles can be used. The piston can both for engines with parallel to the cylinder axis and with splashing inclined to it Cooling nozzles, as well as gasoline and diesel engines are used. The Opening that cannot be supplied with cooling oil through a cooling nozzle serves as additional drain opening. This results in comparison to, for example slot-shaped drain opening an improved cooling effect.

Vorteilhafte Ausführungen sind in den Unteransprüchen beschrieben.Advantageous designs are described in the subclaims.

Die Erfindung wird anhand eines in der Zeichnung dargestellten Ausführungsbeispiels in der nachfolgenden Beschreibung näher erläutert.The invention is based on an embodiment shown in the drawing explained in more detail in the following description.

Es zeigt:

  • Fig. 1
    eine perspektivische Ansicht des erfindungsgemäßen Kolbens im Schnitt und
  • Fig. 2
    eine Unteransicht des erfindungsgemäßen Kolbens.
    • It shows:
  • Fig. 1
    a perspective view of the piston according to the invention in section and
  • Fig. 2
    a bottom view of the piston according to the invention.

    • Ein Kolben 1 weist in seinem Kolbenkopfbereich einen ringförmig angeordneten Kühlkanal 2 auf. Dieser Kühlkanal 2 besitzt zwei wechselseitig zu nutzende Zulauföffnungen 3, 5, die symmetrisch zur Mittelachse angeordnet sind sowie eine Ablauföffnung 4. Diesen Öffnungen 3, 4, 5 sind jeweils Zulauf- bzw. Ablaufkanäle 6, 7, 8 zugeordnet. Die Kanäle 6, 7, 8 sind in vorteilhafter Weise rotationssymmetrisch ausgeführt, wobei die Kanäle 6, 7, 8 zumindest in einem vom Kühlkanal abgewandten Abschnitt 9 konisch ausgeführt sein können. Der Durchmesser der Öffnungen 3, 4, 5 kann ca. 1/25 bis ca. 1/5 des Kolbendurchmessers betragen. Die Zulauf- bzw. Ablaufkanäle 6, 7, 8 können bis zu ca. 15° im Bezug auf die Kolbenachse geneigt sein. Die Öffnungen 3, 4, 5 können scharfkantig, angefast oder abgerundet ausgeführt sein.A piston 1 has a ring-shaped arrangement in its piston head region Cooling channel 2 on. This cooling channel 2 has two mutually usable inlet openings 3, 5, which are arranged symmetrically to the central axis and a drain opening 4. These openings 3, 4, 5 are inlet and outlet channels 6, 7, 8, respectively assigned. The channels 6, 7, 8 are advantageously rotationally symmetrical, the channels 6, 7, 8 at least in one facing away from the cooling channel Section 9 can be conical. The diameter of the openings 3, 4, 5 can be approx. 1/25 to approx. 1/5 of the piston diameter. The inlet and outlet channels 6, 7, 8 can be inclined up to approx. 15 ° with respect to the piston axis. The openings 3, 4, 5 can be sharp-edged, chamfered or rounded his.

    Im vorliegenden Ausführungsbeispiel wird über eine nicht dargestellte Kühlöldüse Kühlöl in den Zulaufkanal 7 und damit in die Zulauföffnung 3 gespritzt. Das Kühlöl gelangt auf diese Weise in den Kühlkanal 2 und kann über die Ablauföffnung 4 und den zugehörigen Ablaufkanal 6 sowie über die Öffnung 5 und den zugehörigen Kanal 8 abfließen.In the present exemplary embodiment, a cooling oil nozzle (not shown) is used Cooling oil is injected into the inlet channel 7 and thus into the inlet opening 3. The cooling oil arrives in the cooling channel 2 and can via the drain opening 4 and the associated drain channel 6 and via the opening 5 and the associated channel 8 drain.

    Claims (6)

    1. Piston for an internal combustion engine having an annularly arranged cooling duct which has inlet and outlet openings, it being possible to feed cooling oil through a cooling-oil nozzle as a free oil jet via an inlet channel into the inlet opening and therefore into the cooling duct and to lead cooling oil away through at least one outlet opening via an outlet duot, characterized in that the cooling duct (2) has at least three openings (3, 4, 5), two inlet openings (3, 5) to be used alternately being arranged, as seen in the plane of the cooling duct, so as to lie opposite the one outlet opening (4), and in that the openings (3, 5) are arranged symmetrically with respect to a centre axis extending through the outlet opening (4).
    2. Piston according to Claim 1 or 2, characterized in that the inlet and outlet ducts (6, 7, 8) are of rotationally symmetrical design.
    3. Piston according to Claim 3, characterized in that the inlet and outlet ducts (6, 7, 8) are of conical design at least in a section (9) facing away from the cooling duct.
    4. Piston according to one of the preceding claims, characterized in that the diameter of the openings (3, 4, 5) is approximately 1/25 to approximately 1/5 of the piston diameter.
    5. Piston according to one of the preceding claims, characterized in that the inlet and outlet ducts (6, 7, 8) are inclined at an angle of up to approximately 15° with respect to the piston axis.
    6. Piston according to one of the preceding claims, characterized in that the openings (3, 4, 5) of the inlet and outlet ducts (6, 7, 8) are designed to be sharp-edged, bevelled or rounded.
    EP00111733A 1999-06-24 2000-06-02 Piston for an internal combustion engine Revoked EP1063409B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19929102A DE19929102A1 (en) 1999-06-24 1999-06-24 Pistons for an internal combustion engine
    DE19929102 1999-06-24

    Publications (3)

    Publication Number Publication Date
    EP1063409A2 EP1063409A2 (en) 2000-12-27
    EP1063409A3 EP1063409A3 (en) 2001-09-19
    EP1063409B1 true EP1063409B1 (en) 2004-08-11

    Family

    ID=7912487

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00111733A Revoked EP1063409B1 (en) 1999-06-24 2000-06-02 Piston for an internal combustion engine

    Country Status (3)

    Country Link
    EP (1) EP1063409B1 (en)
    DE (2) DE19929102A1 (en)
    PL (1) PL340320A1 (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102008038324A1 (en) 2008-08-19 2010-02-25 Mahle International Gmbh Cooling channel of a piston for an internal combustion engine
    US7748361B2 (en) 2004-09-09 2010-07-06 Federal-Mogul Nurnberg Gmbh Piston for a combustion engine, and combustion engine

    Families Citing this family (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    KR20070054920A (en) * 2005-11-24 2007-05-30 동양피스톤 주식회사 Piston
    CN104948338B (en) * 2015-06-30 2018-12-14 滨州渤海活塞有限公司 A kind of piston and preparation method thereof with Two In and One Out reverse circulation cooling oil chamber
    US10227948B2 (en) 2015-12-18 2019-03-12 Mahle International Gmbh Piston for an internal combustion engine
    USD886155S1 (en) 2015-12-18 2020-06-02 Mahle International Gmbh Piston for an internal combustion engine
    DE102016221352A1 (en) 2016-10-28 2018-05-03 Mahle International Gmbh Method for producing a piston
    WO2024036547A1 (en) * 2022-08-18 2024-02-22 Cummins Inc. Internal combustion engine cast iron piston

    Family Cites Families (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    IT1118774B (en) * 1979-06-12 1986-03-03 Ass Eng Italia IMPROVEMENT RELATED TO MUFFLERS IN DIESEL ENGINES
    DE3444661A1 (en) * 1984-12-07 1986-06-12 Klöckner-Humboldt-Deutz AG, 5000 Köln Liquid-cooled piston
    DE4340891A1 (en) 1993-12-01 1995-06-08 Mahle Gmbh Reciprocating pistons for internal combustion engines made in particular of light metal
    DE19618625C1 (en) * 1996-05-09 1997-10-23 Daimler Benz Ag Liquid-cooled pistons for internal combustion engines

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US7748361B2 (en) 2004-09-09 2010-07-06 Federal-Mogul Nurnberg Gmbh Piston for a combustion engine, and combustion engine
    DE102008038324A1 (en) 2008-08-19 2010-02-25 Mahle International Gmbh Cooling channel of a piston for an internal combustion engine

    Also Published As

    Publication number Publication date
    PL340320A1 (en) 2001-01-02
    DE50007347D1 (en) 2004-09-16
    DE19929102A1 (en) 2000-12-28
    EP1063409A3 (en) 2001-09-19
    EP1063409A2 (en) 2000-12-27

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