EP0150542A2 - Piston assemblé, refroidi par liquide, pour moteurs à combustion interne - Google Patents

Piston assemblé, refroidi par liquide, pour moteurs à combustion interne Download PDF

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Publication number
EP0150542A2
EP0150542A2 EP84201953A EP84201953A EP0150542A2 EP 0150542 A2 EP0150542 A2 EP 0150542A2 EP 84201953 A EP84201953 A EP 84201953A EP 84201953 A EP84201953 A EP 84201953A EP 0150542 A2 EP0150542 A2 EP 0150542A2
Authority
EP
European Patent Office
Prior art keywords
piston
cooling
cooling channel
tongue
combustion chamber
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Withdrawn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
EP84201953A
Other languages
German (de)
English (en)
Other versions
EP0150542A3 (fr
Inventor
Horst Dr. Moebus
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.)
Kolbenschmidt AG
Original Assignee
Kolbenschmidt AG
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 Kolbenschmidt AG filed Critical Kolbenschmidt AG
Publication of EP0150542A2 publication Critical patent/EP0150542A2/fr
Publication of EP0150542A3 publication Critical patent/EP0150542A3/fr
Withdrawn legal-status Critical Current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 
    • F02F3/0015—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
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • 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
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel

Definitions

  • the invention relates to a built, liquid-cooled piston for internal combustion engines, in particular diesel engines, the lower part, preferably formed from an aluminum piston alloy, with the upper part, preferably made of iron material, clamped by means of screws and in the case of an annular web running concentrically on the inside of the upper part and a surface of the lower part opposite this, an annular flange provided with a tongue protruding into the outer cooling channel is clamped, the annular web being open both to the radially inner boundary of the connection plane of the two piston components, which is located in the upper part in the area behind the top land and at least part of the ring section Cooling channel forms, as well as a central, connected to the cooling channel via radially arranged coolant bores, open to the connecting plane of the two piston components, internal cooling space and carrying the threaded bores for the screws, and that the cooling channel and cooling space are connected to the coolant circulation system.
  • Such a piston type known from DE-OS 27 23 619 is particularly suitable for use in internal combustion engines machines, preferably medium-speed diesel engines, with the highest engine output and / or heavy oil operation.
  • the cooling takes place by forced or injection cooling, the cooling oil flow being able to take place radially from the outside inwards or vice versa.
  • the design of this piston construction is based on the knowledge that, in the case of built pistons with forced or injection cooling with shaker chambers in a standard design, the highest temperature of the piston crown of over 350 to 400 ° C on the outer oblique edge of the combustion chamber bowl due to the shape of the combustion chamber bowl - due to the design the jet of fuel injected - occurs.
  • Temperatures of 240 to 270 ° C can occur in the area of the inner wall of the outer cooling channel wetted by the cooling oil, which are noticeable by yellow to blue tarnishing on the steel surface of the upper piston part and are already close to or above the flash point of commercially available cooling oils for diesel engines.
  • Experience with such pistons in operation confirms the assumption that the cooling oil cokes very quickly in the area of the outer cooling duct and forms an insulating oil carbon layer, which reduces the cooling effect in such a way that the temperatures of the combustion chamber wall of the cooling duct are substantially increased and so that the strength values of the piston material decrease, the creep resistance is reduced and the thermal deformation is increased. As observed several times, this can lead to permanent deformations.
  • the tongue of the oil guide ring forms a comparatively narrow annular gap with the wall of the cooling channel on the combustion chamber side.
  • the quantity of cooling oil reduced by the throttling leads to a reduced shaker effect and cooling in the area of the ring field, in particular the first piston ring groove, and to an increase in the temperature in this area as a result of heat conduction from the top land downwards, as a result of which a temperature in the piston ring groove from 140 to 160 ° C is achieved.
  • Such temperatures prevent the wet corrosion of the piston and the piston rings even during partial load operation or idling.
  • the tongue can be curved outwards so that its inner side surface forms a comparatively long annular gap with the wall of the cooling channel on the combustion chamber side, as a result of which the absorption of the amount of heat incident is further increased.
  • the tongue can consist of a thermobimetal or with a regulating device of the same type, e.g. a thermostat, so that, depending on the amount of heat to be dissipated, the height of the annular gap between the tongue and the combustion chamber wall of the cooling channel can automatically increase or decrease in order to keep the optimum piston temperature constant regardless of the load in the way a thermostat works.
  • a thermostat works.
  • the piston designed according to the invention is shown as an example in the drawing and explained below.
  • the piston shown in detail in Fig. 1 consists of a eutectic aluminum-silicon alloy or spheroidal graphite cast iron piston lower part 1 and the piston upper part 2 made of steel, which are interconnected via tie rods, not shown.
  • annular flange 9 is clamped between the annular web 4 and the opposite contact surface of the lower piston part 1, on the edge of the cooling channel side of which a tongue 10 protruding into the cooling channel 7, the inner side surface of which forms a comparatively narrow annular gap 11 with the wall of the cooling channel 7 on the combustion chamber side.
  • the cooling oil flows in the cooling chamber 8 and from there via the radial in the annular rib 4 attached to openings 13 into the cooling channel 7.
  • the arrangement of the tongue 10 enters the cooling oil through between the side face of the tongue and the combustion chamber side wall of the cooling channel formed annular gap 11 in the outer part of the cooling channel 7 and flows from there through the drain opening 14.
  • the cooling oil flows via the feed line 15 and the ring flange 17 projecting into the cooling channel 7 into the inner part of the cooling channel 7.
  • the outwardly curved tongue 18 protruding into the cooling channel 7 forms with the inner side surface the combustion chamber-side wall of the cooling channel has an annular gap 19. After emerging from the annular gap 19, the cooling oil flows from the cooling channel 7 via the openings 20 made radially in the annular flange 17 into the cooling chamber 8 and from there via the outlet 21 into the crank chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP84201953A 1984-02-02 1984-12-28 Piston assemblé, refroidi par liquide, pour moteurs à combustion interne Withdrawn EP0150542A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843403624 DE3403624A1 (de) 1984-02-02 1984-02-02 Gebauter, fluessigkeitsgekuehlter kolben fuer brennkraftmaschinen
DE3403624 1984-02-02

Publications (2)

Publication Number Publication Date
EP0150542A2 true EP0150542A2 (fr) 1985-08-07
EP0150542A3 EP0150542A3 (fr) 1985-08-14

Family

ID=6226576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84201953A Withdrawn EP0150542A3 (fr) 1984-02-02 1984-12-28 Piston assemblé, refroidi par liquide, pour moteurs à combustion interne

Country Status (5)

Country Link
US (1) US4587932A (fr)
EP (1) EP0150542A3 (fr)
JP (1) JPS60182342A (fr)
DE (1) DE3403624A1 (fr)
DK (1) DK48485A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103362682A (zh) * 2013-08-06 2013-10-23 安徽江淮汽车股份有限公司 一种柴油发动机活塞

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6165056A (ja) * 1984-09-05 1986-04-03 Mitsubishi Heavy Ind Ltd 内燃機関のピストン冷却装置
DE4018252A1 (de) * 1990-06-07 1991-12-12 Man B & W Diesel Ag Oelgekuehlter kolben
FI102559B1 (fi) * 1995-03-09 1998-12-31 Waertsilae Nsd Oy Ab Polttomoottorin mäntäyksikkö
DE19618625C1 (de) * 1996-05-09 1997-10-23 Daimler Benz Ag Flüssigkeitsgekühlter Kolben für Verbrennungsmotoren
DE19703001C2 (de) * 1997-01-28 1998-12-03 Alcan Gmbh Flüssigkeitsgekühlter Kolben
US6003479A (en) * 1997-05-12 1999-12-21 Evans; Mark M. Piston construction
US6170454B1 (en) 1998-07-31 2001-01-09 Techniphase Industries, Inc. Piston apparatus and methods
GB9909033D0 (en) * 1999-04-19 1999-06-16 Seneca Tech Ltd Piston coolant path
US6250275B1 (en) 1999-08-16 2001-06-26 Caterpillar Inc. Internal combustion engine piston pin lubrication
ES2266011T3 (es) 1999-10-08 2007-03-01 Federal-Mogul Corporation Piston con doble galeria.
WO2003004851A1 (fr) * 2001-07-06 2003-01-16 A.I.M.L. Gmbh Support annulaire refroidi pour segments de piston a refroidissement interne et procede de fabrication associe
DE10134293B4 (de) * 2001-07-14 2009-06-04 Mahle Gmbh Gekühlter Ringträger für einen Kolben
US6532913B1 (en) 2001-11-27 2003-03-18 Caterpillar Inc Piston cooling fin
DE10244512A1 (de) * 2002-09-25 2004-04-15 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
EP1452250B1 (fr) * 2003-03-01 2008-11-12 KS Kolbenschmidt GmbH Méthode de fabrication d'un piston à canal de refroidissement avec collet déformable
DE102004031513A1 (de) * 2004-06-30 2006-01-26 Ks Kolbenschmidt Gmbh Verfahren zur Herstellung eines Kühlkanalkolbens für eine Brennkraftmaschine
DE102004061778A1 (de) * 2004-09-29 2006-04-06 Ks Kolbenschmidt Gmbh Einfach-Reibschweißung
US20070074695A1 (en) * 2005-10-04 2007-04-05 Mahle Technology, Inc. Piston having improved cooling characteristics
GB2431218B (en) * 2005-10-11 2010-06-09 Ford Global Tech Llc Piston with oil drain onto outer surface of skirt
US7299772B1 (en) * 2006-06-22 2007-11-27 Caterpillar Inc. Cooling gallery fan assembly for a piston
WO2010118223A2 (fr) * 2009-04-10 2010-10-14 Federal-Mogul Corporation Piston avec un jet de refroidissement en forme de couronne
US8065985B2 (en) * 2009-05-04 2011-11-29 Federal-Mogul Corporation Piston having a central cooling gallery with a contoured flange
US20110185889A1 (en) * 2010-02-03 2011-08-04 Florin Muscas Piston with central cooling gallery cooling feature
DE102010056220A1 (de) 2010-12-24 2012-06-28 Mahle International Gmbh Kolben für einen Verbrennungsmotor
DE102011119527A1 (de) * 2011-11-26 2013-05-29 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung
US8955486B2 (en) * 2012-02-10 2015-02-17 Federal Mogul Corporation Piston with enhanced cooling gallery
DE102012215541A1 (de) * 2012-08-31 2014-03-06 Mahle International Gmbh Kolben
DE102015002322A1 (de) * 2015-02-26 2016-09-01 Mahle International Gmbh Kolben für einen Verbrennungsmotor
US9797337B2 (en) 2015-07-10 2017-10-24 Mahle International Gmbh Oil-cooled piston for an internal combustion engine
EP3301284B1 (fr) * 2016-09-29 2020-11-25 Caterpillar Energy Solutions GmbH Piston avec dispositif de refroidissement
DE102018109205A1 (de) * 2017-04-19 2018-10-25 Ks Kolbenschmidt Gmbh Kolben in Strukturbauweise
US11067033B2 (en) 2017-05-17 2021-07-20 Tenneco Inc. Dual gallery steel piston
US10591059B2 (en) 2018-06-05 2020-03-17 Mahle International Gmbh Piston with cooling oil diverter
CN111622856A (zh) * 2019-02-28 2020-09-04 强莉莉 一种v型布置的活塞组
DE102019215486A1 (de) * 2019-10-09 2021-04-15 Mahle International Gmbh Kolben für eine Brennkraftmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1476433A1 (de) * 1964-09-08 1969-06-26 Dieselmotorenwerk Veb OElgekuehlter Kolben,vorzugsweise fuer Brennkraftmaschinen
NL6815749A (fr) * 1968-11-05 1970-05-08
DE2723619C2 (de) * 1977-05-25 1984-10-04 Karl Schmidt Gmbh, 7107 Neckarsulm Mehrteiliger, flüssigkeitsgekühlter Kolben für Brennkraftmaschinen
DE3008330A1 (de) * 1980-03-05 1981-09-17 Karl Schmidt Gmbh, 7107 Neckarsulm Fluessigkeitsgekuehlter kolben fuer brennkraftmaschinen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103362682A (zh) * 2013-08-06 2013-10-23 安徽江淮汽车股份有限公司 一种柴油发动机活塞
CN103362682B (zh) * 2013-08-06 2015-08-26 安徽江淮汽车股份有限公司 一种柴油发动机活塞

Also Published As

Publication number Publication date
DK48485D0 (da) 1985-02-01
JPS60182342A (ja) 1985-09-17
EP0150542A3 (fr) 1985-08-14
US4587932A (en) 1986-05-13
DK48485A (da) 1985-08-03
DE3403624A1 (de) 1985-08-08

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

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Withdrawal date: 19870127

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MOEBUS, HORST, DR.