EP1185775A2 - Cooled piston for internal combustion engines - Google Patents

Cooled piston for internal combustion engines

Info

Publication number
EP1185775A2
EP1185775A2 EP00940175A EP00940175A EP1185775A2 EP 1185775 A2 EP1185775 A2 EP 1185775A2 EP 00940175 A EP00940175 A EP 00940175A EP 00940175 A EP00940175 A EP 00940175A EP 1185775 A2 EP1185775 A2 EP 1185775A2
Authority
EP
European Patent Office
Prior art keywords
wall part
cooled piston
piston
piston according
cooled
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
EP00940175A
Other languages
German (de)
French (fr)
Other versions
EP1185775B1 (en
Inventor
Detlef Jacobi
Rolf Wellandt
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
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 GmbH filed Critical Mahle GmbH
Publication of EP1185775A2 publication Critical patent/EP1185775A2/en
Application granted granted Critical
Publication of EP1185775B1 publication Critical patent/EP1185775B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 cooled piston for internal combustion engines with the features according to the preamble of claim 1.
  • Such pistons are known from DD 252 638 AI and DE 41 34 530 AI, in which the wall part serving to cover the downwardly open annular cooling channel is designed as an open sheet metal ring which, using its elastic deformation according to the Seeger ring Principle, ie under prestress in the radial direction, in a groove on the inner circumference of the piston ring zone or on the outer circumference of the combustion chamber wall.
  • a piston head part is known from DE 42 08 037 C2, in which the cooling channel, which is open at the bottom, is covered by a radially fixed tensioned disk spring which is divided at least in two parts on its circumference and which bears freely on supports radially on the inside and outside on axially opposite sides.
  • a piston with a cooling channel in the piston head in which a baffle plate covering the lower open end of the cooling channel is provided, the ends of which are bent vertically upwards in the area of the division by a certain level of cooling oil in the cooling channel to keep .
  • a disadvantage of the above statements is that the supply of the cooling oil for the cooling channel is not satisfactorily solved to the desired extent.
  • the invention is therefore based on the object to improve the supply of the cooling oil in order to cheap catch or. Achieve filling level in the cooling channel.
  • FIG. 2 is a side view of a wall part according to the invention
  • FIG. 3 shows a top view of the wall part according to FIG. 2
  • Fig. 4 is a side view of the twisted ends of the wall part
  • Fig. 5 is a plan view of a second embodiment of the wall part
  • Fig. 6 is a side view of another embodiment of the feed opening of the wall part
  • FIG. 7 is a plan view of FIG .. 6
  • a cooled piston 1 with a cooling channel 3 running in an annular manner in the piston head 2 is closed at its end open towards the piston skirt 4 by a wall part 5, for example a two-part disc spring.
  • the wall part 5 is provided with a first radial division 6 in the region of the oil supply and with a second radial division 7 in the region of the oil drain.
  • the wall part 5 is provided on the one hand with a recess 8, 9, which extends approximately over half the radial width of the wall part 5.
  • a further improvement in the supply of cooling oil can also be achieved by profiling the sections 10, 11, e.g. through a U-shaped design that acts as a gutter.
  • the wall part 5, which has been divided radially once, is on one side at its division 14 for deflecting the cooling oil flow with an obliquely upward direction
  • a drain hole 16 is provided in the wall part 5 as a drain according to about 360.
  • an upwardly narrowing opening 17 is provided in the wall part 5 for supplying the cooling oil, the gap width 18 of which is less than or equal to the diameter 19 of the supplied oil jet.

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)

Abstract

The invention relates to a cooled piston (1) for internal combustion engines. The inventive piston is provided with an annular cooling channel (3) on the periphery of the piston head. Said cooling channel, at its end that is open towards the piston shaft, is closed by a correspondingly shaped wall part (5) that is radially split at least once. The aim of the invention is to improve the supply of cooling oil in the cooling channel. To this end, the wall part at the end allocated to the split (6) is provided with a respective recess and with an upturned S-bend section (10, 11) that serves to deflect the cooling oil jet.

Description

Gekühlter Kolben für Verbrennungsmotoren Cooled pistons for internal combustion engines
Die Erfindung betrifft einen gekühlten Kolben für Verbrennungsmotoren mit den Merkmalen nach dem Oberbegriff des Anspruchs 1.The invention relates to a cooled piston for internal combustion engines with the features according to the preamble of claim 1.
Derartige Kolben sind aus der DD 252 638 AI und der DE 41 34 530 AI bekannt, bei denen das zur Abdeckung des nach unten offenen ringförmig umlaufenden Kühlkanals dienende Wandteil als offener Blechring ausgebildet ist, der unter Ausnutzung seiner elastischen Verformung nach dem Seeger-Ring-Prinzip, d.h. unter Vorspannung in radialer Richtung, in einer Nut am Innenumfang der Kolbenringzone bzw. am Außenumfang der Brennraumwandung liegt.Such pistons are known from DD 252 638 AI and DE 41 34 530 AI, in which the wall part serving to cover the downwardly open annular cooling channel is designed as an open sheet metal ring which, using its elastic deformation according to the Seeger ring Principle, ie under prestress in the radial direction, in a groove on the inner circumference of the piston ring zone or on the outer circumference of the combustion chamber wall.
Aus der DE 42 08 037 C2 ist ein Kolbenkopfteil bekannt, bei dem der unten offene Kühlkanal durch eine auf ihrem Umfang mindestens zweigeteilte radial fixierte gespannte Tellerfeder, die radial innen und außen an axial entgegengesetzten Seiten frei an Auflagern anliegt, abgedeckt ist.A piston head part is known from DE 42 08 037 C2, in which the cooling channel, which is open at the bottom, is covered by a radially fixed tensioned disk spring which is divided at least in two parts on its circumference and which bears freely on supports radially on the inside and outside on axially opposite sides.
Aus der DE 39 91 677 Tl ist ein Kolben mit Kühlkanal im Kolbenkopf bekannt, bei dem eine das untere offene Ende des Kühlkanals abdeckende Prallplatte vorgesehen ist, deren Enden im Bereich der Teilung senkrecht nach oben abgebogen sind, um ein gewisses Niveau an Kühlöl im Kühlkanal zu halten .From DE 39 91 677 Tl a piston with a cooling channel in the piston head is known, in which a baffle plate covering the lower open end of the cooling channel is provided, the ends of which are bent vertically upwards in the area of the division by a certain level of cooling oil in the cooling channel to keep .
Nachteilig an den obigen Ausführungen ist, daß die Zuführung des Kühlöles für den Kühlkanal nicht in dem gewünschten Maße befriedigend gelöst ist. Der Erfindung liegt daher die Aufgabe zugrunde, die Zuführung des Kühlöles zu verbessern, um einen günstigen Fangbzw. Füllgrad im Kühlkanal zu erreichen.A disadvantage of the above statements is that the supply of the cooling oil for the cooling channel is not satisfactorily solved to the desired extent. The invention is therefore based on the object to improve the supply of the cooling oil in order to cheap catch or. Achieve filling level in the cooling channel.
Gelöst wird diese Aufgabe bei einem gattungsgemäßen Kolben durch die Merkmale nach dem kennzeichnenden Teil des Patentanspruchs 1.This object is achieved in a generic piston by the features according to the characterizing part of patent claim 1.
Weitere zweckmäßige Ausgestaltungen nach der Erfindung sind in den Unteransprüchen enthalten.Further expedient configurations according to the invention are contained in the subclaims.
Die Erfindung wird nachfolgend anhand in der Zeichnung dargestellter Ausführungsbeispiele näher erläutert.The invention is explained in more detail below with reference to exemplary embodiments shown in the drawing.
Es zeigtIt shows
Fig. 1 einen Kolben in Seitenansicht im Teilschnitt,1 is a piston in side view in partial section,
Fig. 2 ein erfindungsgemäßes Wandteil in Seitenansicht,2 is a side view of a wall part according to the invention,
Fig. 3 eine Draufsicht des Wandteils nach Fig. 23 shows a top view of the wall part according to FIG. 2
Fig. 4 eine Seitenansicht der vertwisteten Enden des WandteilsFig. 4 is a side view of the twisted ends of the wall part
Fig. 5 eine Draufsicht einer zweiten Ausführung des WandteilsFig. 5 is a plan view of a second embodiment of the wall part
Fig. 6 eine Seitenansicht einer weiteren Ausführung der Zufuhröffnung des WandteilsFig. 6 is a side view of another embodiment of the feed opening of the wall part
Fig. 7 eine Draufsicht nach Fig. 6. Ein gekühlter Kolben 1 mit einem im Kolbenkopf 2 ringförmig umlaufenden Kühlkanal 3 ist an seinem zum Kolbenschaft 4 hin offenen Ende durch ein Wandteil 5, z.B. eine zweigeteilte Tellerfeder, verschlossen. Das Wandteil 5 ist im Bereich der Ölzufuhr mit einer ersten radialen Teilung 6 und im Bereich des Ölablaufs mit einer zweiten radialen Teilung 7 versehen. An seinem der Teilung 6 zugeordneten Ende des Wandteiles 5 ist dieses jeweils einerseits mit einer Aussparung 8, 9, die sich etwa über die Hälfte der radialen Breite des Wandteiles 5 erstreckt, versehen. Andererseits ist - ebenfalls sich etwa über die Hälfte der radialen Breite des Wandteiles 5 erstreckend - ein Teilstück 10, 11 S-förmig 12 so nach oben abgebogen, daß eine gute Zufuhr des Kühlöls in den Kühlkanal 3 gewährleistet ist, um den gewünschten Fang- bzw. Füllgrad zu erreichen.7 is a plan view of FIG .. 6 A cooled piston 1 with a cooling channel 3 running in an annular manner in the piston head 2 is closed at its end open towards the piston skirt 4 by a wall part 5, for example a two-part disc spring. The wall part 5 is provided with a first radial division 6 in the region of the oil supply and with a second radial division 7 in the region of the oil drain. At its end of the wall part 5 assigned to the division 6, the wall part 5 is provided on the one hand with a recess 8, 9, which extends approximately over half the radial width of the wall part 5. On the other hand - also extending over about half the radial width of the wall part 5 - a section 10, 11 S-shaped 12 bent upwards so that a good supply of the cooling oil is guaranteed in the cooling channel 3 in order to achieve the desired catch or Achieve degree of filling.
Eine weitere Verbesserung der Zuführung von Kühlöl kann auch noch durch Profilierung der Teilstücke 10, 11 erreicht werden, z.B. durch eine U-förmige Ausbildung, die als Rinne wirkt .A further improvement in the supply of cooling oil can also be achieved by profiling the sections 10, 11, e.g. through a U-shaped design that acts as a gutter.
In einer weiteren Ausgestaltung durch zusätzliches Vertwi- sten 13 der Enden der abgebogenen Teilstücke 10, 11 kann einerseits - je nach Richtung der Vertwistung - eine verbesserte Füllung des Kühlkanals bzw. andererseits eine zusätzliche Anspritzung der umliegenden Kolbenflächen erreicht werden.In a further embodiment, by additional twisting 13 of the ends of the bent sections 10, 11, on the one hand - depending on the direction of the twisting - an improved filling of the cooling channel or, on the other hand, an additional gating of the surrounding piston surfaces can be achieved.
Gemäß einem Ausführungsbeispiel nach Fig. 5 ist das einmal radial geteilte Wandteil 5 an seiner Teilung 14 zur Ablenkung des Kühlölstromes einseitig mit einem schräg nach obenAccording to an embodiment according to FIG. 5, the wall part 5, which has been divided radially once, is on one side at its division 14 for deflecting the cooling oil flow with an obliquely upward direction
S-förmig abgebogenen Endstück 15 versehen. Als Ablauf nach o ca. 360 ist im Wandteil 5 eine Abiaufbohrung 16 vorgesehen. Gemäß einem weiteren Ausführungsbeispiel nach Fig. 6 und Fig. 7 ist zur Zufuhr des Kühlöls eine sich nach oben verengende Öffnung 17 im Wandteil 5 vorgesehen, deren Spaltbreite 18 kleiner oder gleich dem Durchmesser 19 des zugeführten Ölstrahls ist.Provided S-shaped bent end piece 15. A drain hole 16 is provided in the wall part 5 as a drain according to about 360. According to a further exemplary embodiment according to FIGS. 6 and 7, an upwardly narrowing opening 17 is provided in the wall part 5 for supplying the cooling oil, the gap width 18 of which is less than or equal to the diameter 19 of the supplied oil jet.
Mit einer derartigen Ausführung wird auf konstruktiv einfache Weise eine verbesserte Zufuhr von Kühlöl in den Kühlkanal erreicht. With an embodiment of this type, an improved supply of cooling oil into the cooling channel is achieved in a structurally simple manner.

Claims

Patentansprüche claims
Gekühlter Kolben für Verbrennungsmotoren mit einem im Kolbenkopf ringförmig umlaufenden Kühlkanal, der an seinem zum Kolbenschaft hin offenen Ende durch ein entsprechend geformtes und am Kolben befestigtes mindestens einmal radial geteiltes Wandteil verschlossen ist, dadurch gekennzeichnet, daß das Wandteil (5) mindestens ein zur Ablenkung des Kühlölstrahles dienendes schräg zum Kühlölstrahl ausgerichtetes Teilstück aufweist.Cooled piston for internal combustion engines with an annular cooling channel in the piston head, which is closed at its open end towards the piston skirt by a correspondingly shaped and at least once radially divided wall part fastened to the piston, characterized in that the wall part (5) has at least one for deflecting the Cooling oil jet serving portion oriented obliquely to the cooling oil jet.
Gekühlter Kolben nach Anspruch 1, dadurch gekennzeichnet, daß das Wandteil (5) an seinen der Teilung (6) zugeordneten Enden jeweils eine Aussparung (8, 9) und ein zur Ablenkung des Kühlölstrahles dienendes schräg zum Kühlölstrahl ausgerichtetes Teilstück (10, 11) aufweist.A cooled piston according to claim 1, characterized in that the wall part (5) has at its ends assigned to the division (6) a recess (8, 9) and a section (10, 11) which is oriented obliquely to the cooling oil jet and serves to deflect the cooling oil jet .
Gekühlter Kolben nach Anspruch 2 , dadurch gekennzeichnet, daß das abgebogene Teilstück (10, 11) des einen Endes des Wandteils (5) die Aussparung (8, 9) des anderen Endes des Wandteils (5) im Bereich der Teilung (6) überdeckt .Cooled piston according to claim 2, characterized in that the bent section (10, 11) of one end of the wall part (5) covers the recess (8, 9) of the other end of the wall part (5) in the region of the division (6).
Gekühlter Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das abgebogene Teilstück (10, 11) etwa S-förmig (12) verläuft. Cooled piston according to one of the preceding claims, characterized in that the bent section (10, 11) extends approximately S-shaped (12).
5. Gekühlter Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Enden der abgebogenen Teilstücke (10, 11) vertwistet (13) sind.5. Cooled piston according to one of the preceding claims, characterized in that the ends of the bent sections (10, 11) are twisted (13).
6. Gekühlter Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die abgebogenen Teilstücke (10, 11) profiliert, z.B. U-förmig ausgebildet sind.6. Cooled piston according to one of the preceding claims, characterized in that the bent sections (10, 11) profiled, e.g. Are U-shaped.
7. Gekühlter Kolben nach Anspruch 1, dadurch gekennzeichnet, daß zur Ölzufuhr im Wandteil (5) eine sich nach oben verengende Öffnung (17) vorgesehen ist, deren Spaltbreite (18) kleiner oder gleich dem Durchmesser (19) des zugeführten Ölstrahls ist.7. A cooled piston according to claim 1, characterized in that for the oil supply in the wall part (5) an upwardly narrowing opening (17) is provided, the gap width (18) is less than or equal to the diameter (19) of the supplied oil jet.
8. Gekühlter Kolben nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß gegenüber der ersten Teilung (6) des Wandteils (5) eine zweite Teilung (7) für den Olablauf vorgesehen ist . 8. Cooled piston according to one of the preceding claims, characterized in that a second division (7) is provided for the oil drain compared to the first division (6) of the wall part (5).
EP00940175A 1999-06-11 2000-05-05 Cooled piston for internal combustion engines Expired - Lifetime EP1185775B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19926567 1999-06-11
DE19926567A DE19926567A1 (en) 1999-06-11 1999-06-11 Cooled pistons for internal combustion engines
PCT/DE2000/001456 WO2000077377A2 (en) 1999-06-11 2000-05-05 Cooled piston for internal combustion engines

Publications (2)

Publication Number Publication Date
EP1185775A2 true EP1185775A2 (en) 2002-03-13
EP1185775B1 EP1185775B1 (en) 2002-11-13

Family

ID=7910859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00940175A Expired - Lifetime EP1185775B1 (en) 1999-06-11 2000-05-05 Cooled piston for internal combustion engines

Country Status (6)

Country Link
US (1) US6647861B1 (en)
EP (1) EP1185775B1 (en)
JP (1) JP4473482B2 (en)
BR (1) BR0011493A (en)
DE (2) DE19926567A1 (en)
WO (1) WO2000077377A2 (en)

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WO2005035961A1 (en) * 2003-10-06 2005-04-21 Mahle Gmbh One-piece piston for an internal combustion engine

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DE10158607B4 (en) * 2001-11-29 2005-10-06 Federal-Mogul Nürnberg GmbH Liquid-cooled piston for internal combustion engine
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US6892690B2 (en) * 2003-10-06 2005-05-17 Mahle Gmbh Cooling channel cover for a one-piece piston of an internal combustion engine
US6938604B2 (en) * 2003-10-06 2005-09-06 Mahle Gmbh Cooling channel cover for a one-piece piston of an internal combustion engine
US6820582B1 (en) * 2003-10-06 2004-11-23 Mahle Gmbh Cooling channel cover for a one-piece piston of an internal combustion engine
DE10346822A1 (en) 2003-10-06 2005-04-21 Mahle Gmbh Piston for an internal combustion engine
DE102004019011A1 (en) * 2004-04-20 2005-11-17 Mahle Gmbh Cooling duct cover for a piston of an internal combustion engine
US8347842B2 (en) * 2008-02-19 2013-01-08 Federal-Mogul Corporation Coolable piston for internal combustion engine
US7762227B2 (en) * 2008-02-19 2010-07-27 Federal Mogul Corporation Coolable piston for internal combustion engine
DE102011076369A1 (en) * 2011-05-24 2012-11-29 Mahle International Gmbh Lower cover, particularly one- or multipart ring-shaped cover, for cooling channel of piston of internal combustion engine, has stand pipe-shaped inlet and stand pipe-shaped outlet, where inlet and outlet are formed in single piece
DE102012014195A1 (en) 2012-07-18 2014-01-23 Mahle International Gmbh Piston for an internal combustion engine
DE102012213558A1 (en) 2012-08-01 2014-02-06 Mahle International Gmbh piston
JP5844716B2 (en) * 2012-11-07 2016-01-20 本田技研工業株式会社 Piston of internal combustion engine
DE102013013962A1 (en) * 2013-08-23 2015-02-26 Mahle International Gmbh Assembly of a piston and a Anspritzdüse for an internal combustion engine
US20170051702A1 (en) * 2014-02-21 2017-02-23 Ks Kolbenschmidt Gmbh Piston with an open cooling chamber having a flow-effective oil guiding surface and method for cooling said piston
DE102014015947A1 (en) * 2014-10-30 2016-05-19 Mahle International Gmbh Cooling duct cover and piston provided with a cooling channel cover
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US7409903B2 (en) 2003-10-06 2008-08-12 Mahle Gmbh One-piece piston for an internal combustion engine

Also Published As

Publication number Publication date
DE50000766D1 (en) 2002-12-19
JP2003502557A (en) 2003-01-21
WO2000077377A3 (en) 2001-05-31
US6647861B1 (en) 2003-11-18
BR0011493A (en) 2002-05-14
WO2000077377A2 (en) 2000-12-21
EP1185775B1 (en) 2002-11-13
JP4473482B2 (en) 2010-06-02
DE19926567A1 (en) 2000-12-14

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