EP1063409A2 - Piston for an internal combustion engine - Google Patents

Piston for an internal combustion engine Download PDF

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Publication number
EP1063409A2
EP1063409A2 EP00111733A EP00111733A EP1063409A2 EP 1063409 A2 EP1063409 A2 EP 1063409A2 EP 00111733 A EP00111733 A EP 00111733A EP 00111733 A EP00111733 A EP 00111733A EP 1063409 A2 EP1063409 A2 EP 1063409A2
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EP
European Patent Office
Prior art keywords
inlet
piston
openings
cooling
channel
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.)
Granted
Application number
EP00111733A
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German (de)
French (fr)
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EP1063409A3 (en
EP1063409B1 (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
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Publication date
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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.
  • 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 on the right and a version with one on 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 opposite 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)

Abstract

The piston has a ring-shaped cooling channel with at least three apertures (3,4,5). An outlet aperture (4) is positioned opposite to two alternately useable intake apertures (3,5) in such a way, that the intakes are positioned symmetrically relative to a central axis extending through the outlet. Intake and outlet channels (6,7,8) are rotary-symmetrical, and are conical in an area away from the cooling channel. The diameter of the apertures is approx. 1/25 to 1/5 of the piston diameter.

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. Here 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 an elongated cooling oil inlet opening 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 on the right and a version with one on 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 according to the invention by a piston of the type mentioned solved that the cooling channel has at least three openings, in which Cooling channel level seen from the one drain opening opposite 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)

    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, dadurch gekennzeichnet, daß der Kühlkanal (2) zumindest drei Öffnungen (3, 4, 5) aufweist, wobei in der Kühlkanalebene gesehen der einen Ablauföffnung (4) gegenüberliegend zwei wechselseitig zu nutzende Zulauföffnungen (3, 5) derart angeordnet sind, daß die Öffnungen (3, 5) in Bezug auf eine durch die Ablauföffnung (4) verlaufende Mittelachse symmetrisch angeordnet sind.Having piston for an internal combustion engine having an annularly arranged cooling channel inlet and outlet openings, whereby cooling oil can be supplied through a cooling oil nozzle as a free oil jet via an inlet channel in the inlet opening and therefore into the cooling duct and is discharged through at least one discharge opening via a discharge channel, characterized characterized in that the cooling channel (2) has at least three openings (3, 4, 5), wherein, seen in the cooling channel plane, two mutually usable inlet openings (3, 5) are arranged opposite the one outlet opening (4) in such a way that the openings ( 3, 5) are arranged symmetrically with respect to a central axis running through the drain opening (4). Kolben nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Zulauf- und Ablaufkanäle (6, 7, 8) rotationssymmetrisch ausgeführt sind.Piston according to claim 1 or 2, characterized in that the inlet and outlet channels (6, 7, 8) are rotationally symmetrical. Kolben nach Anspruch 3, dadurch gekennzeichnet, daß die Zulauf- und Ablaufkanäle (6, 7, 8) zumindest in einem vom Kühlkanal abgewandten Abschnitt (9) konisch ausgeführt sind.Piston according to claim 3, characterized in that the inlet and outlet channels (6, 7, 8) are conical at least in a section (9) facing away from the cooling channel. Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Durchmesser der Öffnungen (3, 4, 5) ca.1/25 ― ca.1/5 des Kolbendurchmessers beträgt.Piston according to one of the preceding claims, characterized in that the diameter of the openings (3, 4, 5) is approximately 1/25 - approximately 1/5 of the piston diameter. Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Zulauf- bzw. Ablaufkanäle (6, 7, 8) bis zu ca. 15° in Bezug auf die Kolbenachse geneigt sind. Piston according to one of the preceding claims, characterized in that the inlet and outlet channels (6, 7, 8) are inclined up to approximately 15 ° with respect to the piston axis. Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Öffnungen (3, 4, 5) der Zu- und Ablaufkanäle (6, 7, 8) scharfkantig, angefast oder abgerundet ausgeführt sind.Piston according to one of the preceding claims, characterized in that the openings (3, 4, 5) of the inlet and outlet channels (6, 7, 8) are of sharp-edged, chamfered or rounded design.
    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
    DE19929102 1999-06-24
    DE19929102A DE19929102A1 (en) 1999-06-24 1999-06-24 Pistons for an internal combustion engine

    Publications (3)

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

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    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)

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

    Cited By (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2006027157A1 (en) 2004-09-09 2006-03-16 Federal-Mogul Nürnberg GmbH Piston for a combustion engine, and combustion engine
    EP1790881A3 (en) * 2005-11-24 2008-03-05 Dong Yang Piston Co., Ltd. Piston
    WO2010020231A2 (en) * 2008-08-19 2010-02-25 Mahle International Gmbh Cooling duct for a piston of a combustion engine
    CN104948338A (en) * 2015-06-30 2015-09-30 山东滨州渤海活塞股份有限公司 Piston with two-in-one-out reverse circulating cooling oil cavity and manufacturing method thereof
    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
    WO2024036547A1 (en) * 2022-08-18 2024-02-22 Cummins Inc. Internal combustion engine cast iron piston

    Families Citing this family (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102016221352A1 (en) 2016-10-28 2018-05-03 Mahle International Gmbh Method for producing a piston

    Citations (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE4340891A1 (en) 1993-12-01 1995-06-08 Mahle Gmbh Reciprocating pistons for internal combustion engines made in particular of light metal

    Family Cites Families (3)

    * 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
    DE19618625C1 (en) * 1996-05-09 1997-10-23 Daimler Benz Ag Liquid-cooled pistons for internal combustion engines

    Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE4340891A1 (en) 1993-12-01 1995-06-08 Mahle Gmbh Reciprocating pistons for internal combustion engines made in particular of light metal

    Cited By (9)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2006027157A1 (en) 2004-09-09 2006-03-16 Federal-Mogul Nürnberg GmbH Piston for a combustion engine, and combustion engine
    EP1790881A3 (en) * 2005-11-24 2008-03-05 Dong Yang Piston Co., Ltd. Piston
    WO2010020231A2 (en) * 2008-08-19 2010-02-25 Mahle International Gmbh Cooling duct for a piston of a combustion engine
    WO2010020231A3 (en) * 2008-08-19 2010-04-15 Mahle International Gmbh Cooling duct for a piston of a combustion engine
    JP2012500354A (en) * 2008-08-19 2012-01-05 マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング Piston cooling passage for internal combustion engines
    CN104948338A (en) * 2015-06-30 2015-09-30 山东滨州渤海活塞股份有限公司 Piston with two-in-one-out reverse circulating cooling oil cavity and manufacturing method thereof
    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
    WO2024036547A1 (en) * 2022-08-18 2024-02-22 Cummins Inc. Internal combustion engine cast iron piston

    Also Published As

    Publication number Publication date
    PL340320A1 (en) 2001-01-02
    EP1063409A3 (en) 2001-09-19
    DE50007347D1 (en) 2004-09-16
    EP1063409B1 (en) 2004-08-11
    DE19929102A1 (en) 2000-12-28

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