EP2229521A2 - Piston en deux parties pour moteur à combustion interne - Google Patents

Piston en deux parties pour moteur à combustion interne

Info

Publication number
EP2229521A2
EP2229521A2 EP08861287A EP08861287A EP2229521A2 EP 2229521 A2 EP2229521 A2 EP 2229521A2 EP 08861287 A EP08861287 A EP 08861287A EP 08861287 A EP08861287 A EP 08861287A EP 2229521 A2 EP2229521 A2 EP 2229521A2
Authority
EP
European Patent Office
Prior art keywords
piston
axial direction
expansion sleeve
yield strength
bolt
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.)
Withdrawn
Application number
EP08861287A
Other languages
German (de)
English (en)
Inventor
Wolfgang Issler
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 International GmbH
Original Assignee
Mahle International 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 International GmbH filed Critical Mahle International GmbH
Publication of EP2229521A2 publication Critical patent/EP2229521A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/005—Pistons; Trunk pistons; Plungers obtained by assembling several pieces
    • 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 
    • F02F3/0015—Multi-part pistons
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/02—Elasticity

Definitions

  • the invention relates to a two-part piston for an internal combustion engine according to the preamble of claim 1.
  • a two-part piston for an internal combustion engine which consists of an upper part with a coaxially arranged on the underside of its piston head pin having an external thread, and a lower part, at the bottom part radially inside a coaxially arranged and elastically stretchable in the axial direction expansion sleeve is formed.
  • Fig. 1 is a sectional view of a two-part piston, the upper part and the lower part are screwed together by means of a nut with molded compression sleeve, and
  • Fig. 2 is an assembly aid, whereby the yield strength of a piston attached to the lower part expansion sleeve is increased by a permanent elongation.
  • a two-part, cooled piston 1 which consists of an upper part 2 and a lower part 3.
  • the upper part 2 and the lower part 3 may be made of steel or of another metallic material.
  • a piston head 4 bounds the axial top side of the upper part 2, the radially inner region of which has a combustion bowl 5.
  • an annular wall 6 is integrally formed, the outer surface piston crown side forms a top land 7, which is followed by a shaft ring side 8 with annular grooves for receiving piston rings, not shown in the figure.
  • pin bosses 9, 9 1 On the underside of the lower part 3 facing away from the piston bottom 4 are two pin bosses 9, 9 1 , each with a pin bore 10, 10 "whose end faces 11 are set back relative to the annular wall 6 in the direction of the piston axis 12.
  • the pin bosses 9, 9 1 are over Piston shaft elements 13, 13 'connected together.
  • the upper part 2 and the lower part 3 of the piston 1 are connected via an inner support 14 and via a concentrically arranged outer support 15 with each other.
  • the inner support 14 is formed by a bearing surface 16 arranged on the side of the upper part 2 facing away from the combustion bowl 5 and by a bearing surface 18 arranged on a piston-bottom side on an annular support rib 17 of the lower part 3.
  • the outer support 15 is formed by a bottom surface of the annular wall 6 delimiting support surface 19 and a piston bottom side on an annular support web 20 of the lower part 3 arranged support surface 21.
  • cooling channel 22 From the upper part 2 and the lower part 3 of the piston 1 a arranged in the piston bottom edge portion of the piston 1 cooling channel 22 is formed, the radially outer boundary of the annular wall 6, the radially inner boundary part of the support rib 17 and partly from the piston head 4 and the axially lower Limitation of the lower part 3 of the piston 1 are formed. Cooling oil is introduced into the cooling channel 22 via inlet openings 23.
  • the piston 1 has a further, coaxial with the piston axis 12 arranged, annular cooling channel 24, which has a smaller radial diameter than the outer cooling channel 22 and is disposed within the outer cooling channel 22 as seen in the radial direction.
  • Axial above the inner cooling channel 24 is bounded by the piston head 4, radially outwardly from the support rib 17 and radially below by a thin-walled and elastically yielding, upper bottom part 25 of the lower part 3, to which radially inward an axially upwardly directed expansion sleeve 26 is integrally formed, whose axially upper, first opening 27 is provided with a so far radially inwardly directed curl 28 that the underside of the flange 28 can serve as a stop for an integrally formed on a nut 29 compression sleeve 30.
  • the expansion sleeve 26 forms the radially inner boundary of the inner cooling channel 24.
  • the expansion sleeve 26 has a second opening 43 on its side opposite the first
  • a cylindrical bolt 31 is formed with a lateral surface on the underside of the piston head 4, which has a piston end remote end region with an external thread 32 which corresponds to the internal thread of the nut 29, so that the nut 29 can be screwed onto the external thread 32 ,
  • the axial length of the bolt 31 corresponds approximately to the axial length of the sleeve 29 provided with the compression sleeve 30.
  • the radial diameter of the bolt 31 and in particular its external thread 32 are smaller than the radial diameter of the first opening 27 of the expansion sleeve 26, so that the bolt 31 easily in the first opening 27 is inserted.
  • the radial inner diameter of the compression sleeve 30 is greater than the radial outer diameter of the external thread 32 of the bolt 31st
  • the radial diameter of the pin 31 is formed in a region between the outer thread 32 and the underside of the piston head 4 is smaller than the diameter of the external thread 32 and also less than the inner diameter of the compression sleeve 30, so that between the compression sleeve 30 and the pin 31 an annular cooling space 33 results.
  • cooling oil is introduced into the outer cooling channel 22, which flows via a connecting channel 34 into the inner cooling channel 24, from where part of the oil flows through an opening 35 in the upper bottom part 25 of the lower part 3 back into the crankcase.
  • a small portion of the oil flows through a gap 36 between the flange 28 and the lower surface of the piston head 4 and the first opening 27 of the expansion sleeve 26 in the cooling chamber 33, from where it is incorporated into the external thread 32 of the bolt 31 and parallel to the piston axis 12 lying drainage channels flows back into the crankcase, of which in Fig. 1, a drain passage 37 is shown. This causes a very good cooling of the thermally highly loaded upper part 2 of the piston. 1
  • the bolt 31 arranged on the underside of the piston head 4 is first guided through the first opening 27 of the expansion sleeve 26, which is formed on the second opening 43 in the upper bottom part 25 of the piston lower part 3.
  • the upper part 2 and the lower part 3 of the piston 1 are aligned coaxially with each other, which is achieved in that the support web 20 in section has the shape of a radially inwardly and axially directed in the direction of the piston head 4 stage , And that the lower end face of the annular wall 6 on the inside has a cylindrical recess 38, the inner shape of the outer shape of the support web 20 corresponds, so that during assembly of upper and lower part 2, 3 of the piston 1, the support web 20 inserted into the recess 38 is, and thus upper part 2 and lower part 3 are aligned coaxially.
  • the compression sleeve 30 of the nut 29 is slid over the external thread 32 of the bolt 31 until the internal thread of the nut 29 comes into contact with the external thread 32 of the bolt 31.
  • the mother 29 is now so far on the external thread 32 is screwed until the upper end face of the compression sleeve 30 comes into contact with the flange 28 of the expansion sleeve 26.
  • a threaded bolt 41 may be used with an outer diameter of FIG. 2, which is slightly smaller than the inner diameter of the first opening 27 in which the expansion sleeve 26 piston crown side limiting crimping 28, so that the threaded bolt 41 without problems through the first opening 27 and the second opening 43 can be passed.
  • a tensile force is exerted on the threaded bolt 41 in the direction of the arrow 40, which exerts a controlled tensile stress on the expansion sleeve 26 via the nut 42 resting on the flanging 28 in order to increase the expansion sleeve 26 in the axial direction by approximately 1% of its length stretch.
  • the piston 1 is in this case mounted in a mounting device, not shown in Fig. 2.
  • the yield strength of the compression sleeve 30 material can be increased by subjecting the compression sleeve 30 to a calculated compressive force that compresses the compression sleeve 30 by approximately 1% of its length.

Landscapes

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

Abstract

L'invention concerne un piston (1) en deux parties pour moteur à combustion interne, comportant une partie supérieure (2) qui présente, sur la face inférieure de la tête de piston (4), un axe (31) à filet externe (32), ainsi qu'une partie inférieure (3) présentant un élément tête (25) sur lequel est façonnée radialement à l'intérieur une douille extensible (26) axialement élastique, dans laquelle est introduit l'axe (31) pour le vissage de la partie supérieure (2) et de la partie inférieure (3). Pour une meilleure résistance, le matériau de la douille extensible (26) a une limite d'élasticité apparente supérieure à celle du reste du matériau du piston. L'augmentation de la limite d'élasticité apparente est obtenue par un allongement rémanent de la douille extensible (26) d'environ 1% de sa longueur dans l'axe.
EP08861287A 2007-12-14 2008-12-01 Piston en deux parties pour moteur à combustion interne Withdrawn EP2229521A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007060472A DE102007060472A1 (de) 2007-12-14 2007-12-14 Zweiteiliger Kolben für einen Verbrennungsmotor
PCT/DE2008/001997 WO2009076928A2 (fr) 2007-12-14 2008-12-01 Piston en deux parties pour moteur à combustion interne

Publications (1)

Publication Number Publication Date
EP2229521A2 true EP2229521A2 (fr) 2010-09-22

Family

ID=40680003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08861287A Withdrawn EP2229521A2 (fr) 2007-12-14 2008-12-01 Piston en deux parties pour moteur à combustion interne

Country Status (7)

Country Link
US (1) US8113105B2 (fr)
EP (1) EP2229521A2 (fr)
JP (1) JP2011506816A (fr)
KR (1) KR101531436B1 (fr)
CN (1) CN101896711B (fr)
DE (1) DE102007060472A1 (fr)
WO (1) WO2009076928A2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8403865B2 (en) 2004-02-05 2013-03-26 Earlysense Ltd. Prediction and monitoring of clinical episodes
US8585607B2 (en) 2007-05-02 2013-11-19 Earlysense Ltd. Monitoring, predicting and treating clinical episodes
US9883809B2 (en) 2008-05-01 2018-02-06 Earlysense Ltd. Monitoring, predicting and treating clinical episodes
DE102008058190A1 (de) * 2008-11-20 2010-05-27 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
DE102011100470A1 (de) * 2011-05-04 2012-11-08 Ks Kolbenschmidt Gmbh Verfahren zur Herstellung eines Kühlkanalkolbens und zugehöriger Kolben
US8544441B2 (en) * 2011-08-04 2013-10-01 Federal-Mogul Ignition Company Piston including a pair of cooling chambers
US9291119B2 (en) * 2013-03-14 2016-03-22 Mahle International Gmbh Piston assembly with preloaded support surfaces
US11156186B2 (en) * 2019-05-02 2021-10-26 Woodward, Inc. Multiple piece piston
CN114645798B (zh) * 2022-03-14 2023-02-28 北京理工大学 一种活塞销孔衬套结构

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR752700A (fr) * 1932-06-30 1933-09-28 Tête chaude de piston isolée pour moteur à combustion interne fonctionnant suivant le cycle diesel
DE1016062B (de) * 1955-10-28 1957-09-19 Maschf Augsburg Nuernberg Ag Kolben fuer Brennkraftmaschinen
GB1166477A (en) * 1965-10-30 1969-10-08 Nippon Kokan Kk Method for Improving the Mechanical Strength of Elongate Ferrous Metal Workpieces
DE2914456A1 (de) * 1979-04-10 1980-10-23 Schmidt Gmbh Karl Gebauter kolben fuer brennkraftmaschinen
JPH01121552A (ja) * 1987-11-06 1989-05-15 Ngk Insulators Ltd 内燃機関のピストン
IT1240526B (it) * 1990-07-31 1993-12-17 Borgo Nova S.P.A. Perfezionamento relativo a pistoni, in genere.
DE4129746C2 (de) * 1991-09-06 1994-04-14 Man B & W Diesel Ag Gebauter Kolben für Hubkolbenmaschinen
CN2138701Y (zh) * 1992-10-08 1993-07-21 铁道部大连机车车辆工厂 柴油机钢顶铁裙组合活塞
FI102559B1 (fi) * 1995-03-09 1998-12-31 Waertsilae Nsd Oy Ab Polttomoottorin mäntäyksikkö
JPH1182152A (ja) * 1997-09-12 1999-03-26 Yamaha Motor Co Ltd アルミニウム合金製シリンダブロック及びその製造方法
DE19814223A1 (de) * 1998-03-31 1999-10-07 Schloemann Siemag Ag Verfahren zur Herstellung von mikrolegierten Baustählen
DE19910582A1 (de) * 1999-03-10 2000-09-28 Mahle Gmbh Gebauter Kolben
CN2573702Y (zh) * 2002-08-16 2003-09-17 大连机车研究所 280/285系列机车柴油机用钢顶铝裙活塞的改进
DE10257022A1 (de) * 2002-12-06 2004-06-17 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
DE10337961A1 (de) * 2003-08-19 2005-04-21 Mahle Gmbh Mehrteiliger Kolben für einen Verbrennungsmotor
DE102004030218A1 (de) * 2004-06-22 2006-01-19 Mahle Gmbh Gebauter Kolben für einen Verbrennungsmotor
DE102005060548A1 (de) 2005-05-10 2006-12-28 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
DE102005041409A1 (de) * 2005-09-01 2007-03-08 Mahle International Gmbh Zweiteiliger Kolben für einen Verbrennungsmotor
DE102005042003A1 (de) * 2005-09-05 2007-03-08 Mahle International Gmbh Gebauter, flüssigkeitsgekühlter Kolben
KR101279842B1 (ko) * 2005-12-17 2013-06-28 말레 인터내셔널 게엠베하 내연 기관용 투피스형 피스톤
DE102007019931A1 (de) * 2007-04-27 2008-10-30 Mahle International Gmbh Verfahren zum Verschrauben zweier Metallteile

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009076928A3 *

Also Published As

Publication number Publication date
JP2011506816A (ja) 2011-03-03
CN101896711B (zh) 2012-08-08
US20090151556A1 (en) 2009-06-18
DE102007060472A1 (de) 2009-06-18
KR101531436B1 (ko) 2015-06-24
CN101896711A (zh) 2010-11-24
US8113105B2 (en) 2012-02-14
WO2009076928A2 (fr) 2009-06-25
KR20100098664A (ko) 2010-09-08
WO2009076928A3 (fr) 2009-10-29

Similar Documents

Publication Publication Date Title
EP1960653B1 (fr) Piston en deux pieces pour moteur a combustion interne
EP2229521A2 (fr) Piston en deux parties pour moteur à combustion interne
WO2007025529A1 (fr) Piston en deux parties pour moteur a combustion interne
WO2005124137A1 (fr) Piston compose conçu pour un moteur a combustion interne
EP1922478B1 (fr) Piston en plusieurs parties, refroidi par liquide
WO2005124136A1 (fr) Piston compose conçu pour un moteur a combustion interne
DE3521178C2 (fr)
EP1489314A2 (fr) Articulation à rotule
DE102005060548A1 (de) Zweiteiliger Kolben für einen Verbrennungsmotor
EP2189644B1 (fr) Piston en deux parties pour un moteur à combustion
EP2352905A1 (fr) Dispositif de montage comportant un tirant et procédé correspondant pour un système de rotor d'une turbomachine axiale
EP1660769B1 (fr) Piston en plusieurs parties destine a un moteur a combustion interne
DE102016119064A1 (de) Kolben mit Außenverschraubung
DE4413217A1 (de) Kraftstoffeinspritzdüse für Brennkraftmaschinen
DE102005055822B4 (de) Hülsenanordnung
AT524593B1 (de) Fluidkolben-Vorrichtung
EP2982893B1 (fr) Dispositif de serrage de tuyau
DE102012015504B4 (de) Bauteil mit Einschraubabschnitt und damit ausgestattete Baugruppe
EP1336722B1 (fr) Tringlerie et son procédé de fabrication
DE102021006219B3 (de) Brems- und/oder Klemmvorrichtung mit kolbenbelastbarem Scheibenelement
AT524567B1 (de) Längenverstellbare Pleuelstange mit kompaktem Ablassventil
DE102016207738B4 (de) Kraftstoffhochdruckpumpe und Abdichteinrichtung
DE10141176A1 (de) Lösbare Verbindung zum Kuppeln eines Gaswechselventils einer Brennkraftmaschine mit einem Aktor
DE102013106630B4 (de) Verbindungsanordnung zur Verbindung eines Stellelements eines Aktuators mit einem Stellglied sowie Aktuator
AT501335B1 (de) Ventilbetätigungseinrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20100702

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20160701