EP1238191A1 - Bottom covering of a cooling chamber for pistons of internal combustion engines - Google Patents

Bottom covering of a cooling chamber for pistons of internal combustion engines

Info

Publication number
EP1238191A1
EP1238191A1 EP00988687A EP00988687A EP1238191A1 EP 1238191 A1 EP1238191 A1 EP 1238191A1 EP 00988687 A EP00988687 A EP 00988687A EP 00988687 A EP00988687 A EP 00988687A EP 1238191 A1 EP1238191 A1 EP 1238191A1
Authority
EP
European Patent Office
Prior art keywords
cover
pistons
cooling chamber
standpipe
internal combustion
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
EP00988687A
Other languages
German (de)
French (fr)
Other versions
EP1238191B1 (en
Inventor
Klaus Keller
Peter Kemnitz
Roland Lochmann
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 EP1238191A1 publication Critical patent/EP1238191A1/en
Application granted granted Critical
Publication of EP1238191B1 publication Critical patent/EP1238191B1/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/921—Snap-fit

Definitions

  • the invention relates to a lower cover of a cooling space for pistons of internal combustion engines according to the preamble of claim 1.
  • Such covers are e.g. B. is known from US 4,377,967 A or from DD-PS 91162.
  • a standpipe 38 is shown, which is to ensure a certain level above the cover or in the bowl 70.
  • the standpipe is made of metal and is connected to the cover by soldering or welding.
  • DE-PS 91162 an injection tube 15 protrudes both upwards into the cooling channel and as a tubular inlet downwards in the direction of an oil spray nozzle 17. The type of attachment of the injection tube to the cooling channel is not discernible. It can be assumed that the injection tube is also welded or soldered to the sheet metal cooling duct 13.
  • the invention is therefore concerned with the problem of simply attaching a standpipe or an inlet to a lower cooling chamber cover of a piston. This problem is solved by the characterizing feature of claim 1.
  • Advantageous further developments are the subject of the dependent claims.
  • the snap-in or clip-in of a standpipe or an inlet pipe into the cover provides a very simple and cost-saving attachment.
  • the component to be clipped is advantageously made of plastic, since in plastic the resiliently engaging parts can be molded simultaneously with the manufacture of the standpipe. Plastic injection molding is useful as the manufacturing process. For higher loads, the component to be clipped in can also consist of metal.
  • clip-in standpipes according to the invention have a cross-section that deviates from the shape of a circular ring, in particular oval.
  • the application is particularly intended for approximately circular lower covers of cooling channels, which according to DE 4208037 C is formed by a radially fixed tensioned disc spring which is at least two-part on its circumference and which rests freely on supports radially on the inside and outside on axially opposite sides, as in the following shown in Fig. 1.
  • the lower cover of the cooling space can also be provided in one piece with the piston base body, e.g. in the case of welded pistons, in particular pistons produced by friction welding.
  • Fig. 1 shows an inventive lower cover of a cold room in a piston
  • Fig. 2 is a clip into a cold room cover standpipe (cross section, top view).
  • a pendulum shaft piston 1 has a cooling channel 2, which is closed at the bottom by a cover 3 in the form of a two-part plate spring.
  • a standpipe 4 - which is also designed as an inlet - is fixed in the cover 3 by snapping it into place.
  • the standpipe 4 is inserted into the cover 3 from below during assembly.
  • the area with the locking lugs 5 is elastically deformed inward and springs as soon as the contact surface 6 abuts the cover 3 into the latching position by the standpipe 4 snapping into the cover 3 with the groove lying directly below the locking lugs 5.
  • the standpipe is flared.

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)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The aim of the invention is to provide an easy fastening of a tubular supply or a vertical pipe in a bottom covering of a cooling chamber for pistons of internal combustion engines, e.g. in a circular covering of a cooling channel of an articulated-skirt piston. To this end, the vertical tube or the tubular supply is clipped into the bottom covering or is fastened thereto by a detent connection.

Description

Untere Abdeckung eines Kühlraumes für Kolben von Verbrennungsmotoren Bottom cover of a cold room for pistons of internal combustion engines
Die Erfindung betrifft eine untere Abdeckung eines Kühlraumes für Kolben von Verbrennungsmotoren nach dem Oberbegriff des Anspruchs 1.The invention relates to a lower cover of a cooling space for pistons of internal combustion engines according to the preamble of claim 1.
Derartige Abdeckungen sind z. B. bekannt aus der US 4,377,967 A oder aus der DD-PS 91162. In Fig. 4 und Fig. 5 der US 4,377,967 ist ein Standrohr 38 dargestellt, das eine bestimmte Füllhöhe oberhalb der Abdeckung bzw. in dem Napf 70 gewährleisten soll. Das Standrohr besteht aus Metall und ist durch Löten oder Schweißen mit der Abdeckung verbunden. Bei der DE-PS 91162 ragt ein Einspritzröhrchen 15 sowohl nach oben in den Kühlkanal hinein als auch als rohrartiger Zulauf nach unten in Richtung einer Öl-Spritzdüse 17. Die Art der Befestigung des Einspritzröhrchens am Kühlkanal ist nicht erkennbar. Es ist davon auszugehen, daß das Einspritzröhrchen ebenfalls mit dem Blechkühlkanal 13 verschweißt oder verlötet ist.Such covers are e.g. B. is known from US 4,377,967 A or from DD-PS 91162. In Fig. 4 and Fig. 5 of US 4,377,967 a standpipe 38 is shown, which is to ensure a certain level above the cover or in the bowl 70. The standpipe is made of metal and is connected to the cover by soldering or welding. In DE-PS 91162 an injection tube 15 protrudes both upwards into the cooling channel and as a tubular inlet downwards in the direction of an oil spray nozzle 17. The type of attachment of the injection tube to the cooling channel is not discernible. It can be assumed that the injection tube is also welded or soldered to the sheet metal cooling duct 13.
Das Verschweißen oder Verlöten eines Standrohres bzw. eines Zulaufes in der Abdeckung stellt jedoch einen aufwendigen Fertigungsschritt dar.However, welding or soldering a standpipe or an inlet in the cover represents a complex manufacturing step.
Die Erfindung beschäftigt sich daher mit dem Problem, ein Standrohr bzw. einen Zulauf auf einfache Weise an einer unteren Kühlraumabdeckung eines Kolbens zu befestigen. Dieses Problem wird gelöst durch das kennzeichnende Merkmal des Anspruchs 1. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche . Durch das Einrasten bzw. Einclipsen eines Standrohres oder eines Zulaufrohres in die Abdeckung ist eine sehr einfache und kostensparende Befestigung gegeben.The invention is therefore concerned with the problem of simply attaching a standpipe or an inlet to a lower cooling chamber cover of a piston. This problem is solved by the characterizing feature of claim 1. Advantageous further developments are the subject of the dependent claims. The snap-in or clip-in of a standpipe or an inlet pipe into the cover provides a very simple and cost-saving attachment.
Das einzuclipsende Bauteil besteht vorteilhaft aus Kunststoff, da bei Kunststoff die federnd einrastenden Teile gleichzeitig mit der Herstellung des Standrohres angeformt werden können. Als Herstellverfahren ist KunststoffSpritzgießen zweckmäßig. Für höhere Belastungen kann das einzuclipsende Bauteil auch aus Metall bestehen.The component to be clipped is advantageously made of plastic, since in plastic the resiliently engaging parts can be molded simultaneously with the manufacture of the standpipe. Plastic injection molding is useful as the manufacturing process. For higher loads, the component to be clipped in can also consist of metal.
Vorteilhaft weisen erfindungsgemäße einclipsbare Standrohre einen von der Kreisringform abweichenden, insbesondere ovalen Querschnitt auf .Advantageously, clip-in standpipes according to the invention have a cross-section that deviates from the shape of a circular ring, in particular oval.
Die Anwendung ist insbesondere vorgesehen für etwa kreisringförmige untere Abdeckungen von Kühlkanälen, die gemäß DE 4208037 C durch eine auf ihrem Umfang mindestens zweigeteilte, radial fixierte gespannte Tellerfeder gebildet ist, die radial innen und außen an axial entgegengesetzten Seiten frei an Auflagern anliegt, wie im folgenden in Fig. 1 dargestellt .The application is particularly intended for approximately circular lower covers of cooling channels, which according to DE 4208037 C is formed by a radially fixed tensioned disc spring which is at least two-part on its circumference and which rests freely on supports radially on the inside and outside on axially opposite sides, as in the following shown in Fig. 1.
Die untere Abdeckung des Kühlraumes kann aber auch einstük- kig mit Kolbengrundkörper vorliegen, z.B. bei geschweißten Kolben, insbesondere durch Reibschweißen hergestellten Kolben.The lower cover of the cooling space can also be provided in one piece with the piston base body, e.g. in the case of welded pistons, in particular pistons produced by friction welding.
Die Erfindung wird im folgenden anhand einer Zeichnung näher erläutert. Es zeigt:The invention is explained in more detail below with reference to a drawing. It shows:
Fig. 1 eine erfindungsgemäße untere Abdeckung eines Kühlraums in einem KolbenFig. 1 shows an inventive lower cover of a cold room in a piston
Fig. 2 ein in eine Kühlraumabdeckung einclipsbares Standrohr (Querschnitt, Draufsicht) . Ein Pendelschaftkolben 1 weist einen Kühlkanal 2 auf, der nach unten durch eine Abdeckung 3 in Form einer zweigeteilten Tellerfeder verschlossen ist. In der Abdeckung 3 ist ein Standrohr 4 - das auch als Zulauf ausgebildet ist - durch Einrasten fixiert.Fig. 2 is a clip into a cold room cover standpipe (cross section, top view). A pendulum shaft piston 1 has a cooling channel 2, which is closed at the bottom by a cover 3 in the form of a two-part plate spring. A standpipe 4 - which is also designed as an inlet - is fixed in the cover 3 by snapping it into place.
Das Standrohr 4 wird bei der Montage von unten in die Abdeckung 3 eingeschoben. Dabei wird der Bereich mit den Rastnasen 5 elastisch nach innen verformt und federt, sobald die Anlagefläche 6 an der Abdeckung 3 anliegt, in die Einrastposition, indem das Standrohr 4 mit der direkt unterhalb der Rastnasen 5 liegenden Nut in die Abdeckung 3 einrastet. In seinem unteren Bereich 7 ist das Standrohr trichterförmig aufgeweitet. The standpipe 4 is inserted into the cover 3 from below during assembly. The area with the locking lugs 5 is elastically deformed inward and springs as soon as the contact surface 6 abuts the cover 3 into the latching position by the standpipe 4 snapping into the cover 3 with the groove lying directly below the locking lugs 5. In its lower area 7, the standpipe is flared.

Claims

Patentansprüche claims
1. Untere Abdeckung eines Kühlraumes für Kolben von Verbrennungsmotoren, insbesondere etwa kreisringförmige Abdeckung oder Teil einer insgesamt etwa kreisringförmigen Abdeckung, mit einem rohrartigen Zulauf und/oder einem rohrartigen Standrohr, die jeweils an der Abdek- kung befestigt sind, dadurch gekennzeichnet, daß der rohrartige Zulauf und/oder das Standrohr durch eine Rastverbindung oder durch Einclipsen an der Abdek- kung befestigt sind/ist.1. Lower cover of a cooling chamber for pistons of internal combustion engines, in particular approximately circular cover or part of an overall approximately circular cover, with a tubular inlet and / or a tubular standpipe, which are each attached to the cover, characterized in that the tubular Inlet and / or the standpipe are / are attached to the cover by a snap-in connection or by clipping.
2. Untere Abdeckung eines Kühlraumes für Kolben nach Anspruch 1, dadurch gekennzeichnet, daß der rohrartige Zulauf oder das Standrohr aus Kunststoff bestehen.2. Lower cover of a cooling chamber for pistons according to claim 1, characterized in that the tubular inlet or the standpipe are made of plastic.
3. Untere Abdeckung eines Kühlraumes für Kolben nach Anspruch 1 oder 2 , dadurch gekennzeichnet, daß der Querschnitt des rohrartigen Zulaufs bzw. des3. Lower cover of a cooling chamber for pistons according to claim 1 or 2, characterized in that the cross section of the tubular inlet or the
Standrohrs von der Kreisringform abweicht.Standpipe deviates from the circular ring shape.
4. Untere Abdeckung eines Kühlraumes für Kolben nach Anspruch 3, dadurch gekennzeichnet, daß der Querschnitt oval ist. 4. Lower cover of a cooling chamber for pistons according to claim 3, characterized in that the cross section is oval.
EP00988687A 1999-12-17 2000-12-05 Bottom covering of a cooling chamber for pistons of internal combustion engines Expired - Lifetime EP1238191B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19960913 1999-12-17
DE19960913A DE19960913A1 (en) 1999-12-17 1999-12-17 Bottom cover of a cold room for pistons of internal combustion engines
PCT/DE2000/004358 WO2001044645A1 (en) 1999-12-17 2000-12-05 Bottom covering of a cooling chamber for pistons of internal combustion engines

Publications (2)

Publication Number Publication Date
EP1238191A1 true EP1238191A1 (en) 2002-09-11
EP1238191B1 EP1238191B1 (en) 2005-07-20

Family

ID=7933039

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00988687A Expired - Lifetime EP1238191B1 (en) 1999-12-17 2000-12-05 Bottom covering of a cooling chamber for pistons of internal combustion engines

Country Status (6)

Country Link
US (1) US6722263B2 (en)
EP (1) EP1238191B1 (en)
JP (1) JP2003517139A (en)
BR (1) BR0016461B1 (en)
DE (2) DE19960913A1 (en)
WO (1) WO2001044645A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016066600A1 (en) * 2014-10-30 2016-05-06 Mahle International Gmbh Cooling channel cover and piston provided with a cooling channel cover
US9689343B2 (en) 2012-08-01 2017-06-27 Mahle International Gmbh Piston
JP2017535715A (en) * 2014-10-30 2017-11-30 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ＭＡＨＬＥ Ｉｎｔｅｒｎａｔｉｏｎａｌ ＧｍｂＨ Piston with cooling passage cover and cooling passage cover

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US6401595B1 (en) * 2000-10-18 2002-06-11 Caterpillar Inc. Piston for an internal combustion engine and method of assembly
DE10214830A1 (en) 2002-04-04 2004-01-08 Mahle Gmbh Oil inlet for a piston of an internal combustion engine provided with a cooling channel
DE10221561A1 (en) * 2002-05-15 2004-01-08 Mahle Gmbh Cooled piston for 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
DE10346819A1 (en) * 2003-10-06 2005-04-21 Mahle Gmbh One-piece piston for an internal combustion engine
US6920860B2 (en) * 2003-10-06 2005-07-26 Mahle Gmbh Cooling channel cover for a one-piece piston of an internal combustion engine
US6892690B2 (en) * 2003-10-06 2005-05-17 Mahle Gmbh Cooling channel cover for a one-piece piston of 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
DE102004029926B4 (en) * 2004-06-21 2007-09-20 Federal-Mogul Nürnberg GmbH Piston for an internal combustion engine
DE102004029927B4 (en) * 2004-06-21 2006-07-13 Federal-Mogul Nürnberg GmbH Piston for internal combustion engine, has cooling conduit with base, inlet and outlet openings, and flanges provided in area of openings, where flanges extend above base of cooling conduit
DE102004057624A1 (en) * 2004-11-30 2006-06-01 Mahle International Gmbh Piston for internal combustion engine, has cooling duct which is closed by cooling duct cover that is provided with tongue in radial inner zone, where tongue engages into recess that is molded into bottom part of piston
DE102007050213A1 (en) * 2007-10-20 2009-04-23 Mahle International Gmbh Piston for an internal combustion engine
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US8347842B2 (en) * 2008-02-19 2013-01-08 Federal-Mogul Corporation Coolable piston for internal combustion engine
US9238283B2 (en) * 2008-07-24 2016-01-19 Ks Kolbenschmidt Gmbh Friction welded steel piston having optimized cooling channel
DE102009056922B4 (en) * 2009-12-03 2019-03-14 Mahle International Gmbh Inlet funnel for the cooling channel of a piston
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DE102011106379A1 (en) * 2011-07-04 2013-01-10 Mahle International Gmbh Piston for an internal combustion engine
MX2016013321A (en) * 2014-04-09 2017-01-18 Ks Kolbenschmidt Gmbh Elongated cooling channel inlet for cooling channel pistons, and method for operating the same.
US9920869B2 (en) * 2014-05-22 2018-03-20 United Technologies Corporation Cooling systems for gas turbine engine components
KR20170095297A (en) 2014-12-19 2017-08-22 페더럴-모걸 엘엘씨 Piston with cooling gallery having enhaced oil inlet and method of construction thereof
USD886155S1 (en) 2015-12-18 2020-06-02 Mahle International Gmbh Piston for an internal combustion engine
US10227948B2 (en) 2015-12-18 2019-03-12 Mahle International Gmbh Piston for an internal combustion engine
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US9689343B2 (en) 2012-08-01 2017-06-27 Mahle International Gmbh Piston
WO2016066600A1 (en) * 2014-10-30 2016-05-06 Mahle International Gmbh Cooling channel cover and piston provided with a cooling channel cover
CN107110064A (en) * 2014-10-30 2017-08-29 马勒国际有限公司 Cooling duct cover piece and the piston for being provided with cooling duct cover piece
JP2017535715A (en) * 2014-10-30 2017-11-30 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ＭＡＨＬＥ Ｉｎｔｅｒｎａｔｉｏｎａｌ ＧｍｂＨ Piston with cooling passage cover and cooling passage cover
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Also Published As

Publication number Publication date
US20020178910A1 (en) 2002-12-05
US6722263B2 (en) 2004-04-20
WO2001044645A1 (en) 2001-06-21
DE19960913A1 (en) 2001-06-21
BR0016461A (en) 2002-08-27
EP1238191B1 (en) 2005-07-20
JP2003517139A (en) 2003-05-20
DE50010778D1 (en) 2005-08-25
BR0016461B1 (en) 2008-11-18

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