EP0027445B1 - Oil cooled piston - Google Patents

Oil cooled piston Download PDF

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Publication number
EP0027445B1
EP0027445B1 EP79901340A EP79901340A EP0027445B1 EP 0027445 B1 EP0027445 B1 EP 0027445B1 EP 79901340 A EP79901340 A EP 79901340A EP 79901340 A EP79901340 A EP 79901340A EP 0027445 B1 EP0027445 B1 EP 0027445B1
Authority
EP
European Patent Office
Prior art keywords
ledge
wall
groove
piston
crown
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.)
Expired
Application number
EP79901340A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0027445A1 (en
EP0027445A4 (en
Inventor
John K. Amdall
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Publication of EP0027445A4 publication Critical patent/EP0027445A4/en
Publication of EP0027445A1 publication Critical patent/EP0027445A1/en
Application granted granted Critical
Publication of EP0027445B1 publication Critical patent/EP0027445B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/08—Cooling of piston exterior only, e.g. by jets
    • 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
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • 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
    • 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
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • F02F2003/0061—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by welding

Definitions

  • This invention relates generally to oil cooled pistons.
  • an oil cooled piston which comprises a crown portion; inner and outer annular walls connected to the crown portion and defining therebetween an annular groove open at one end; and a substantially annular ledge extending from the inner wall towards the outer wall, for trapping cooling fluid thereon, the ledge having a surface inclined from the inner wall into the annular groove, is characterized in that the outer wall has an end surface adjacent the open end of the groove, that the surface of the ledge is adjacent the open end of the groove, the ledge extending across the open end of the groove towards the end surface of the outer wall, and that the ledge has an opening for enabling a stream of fluid to be directed past the ledge into the annular groove.
  • Fluid is thus trapped by the annular ledge so as to be directed back into the groove on movement of the piston, in order to increase the cooling effect.
  • a reciprocating piston 10, Figure 1 has a journal pin 12 by which it is connected at boss 15 to a connecting rod 14 at one end 17, the connecting rod connecting to a crankshaft (not shown) at its opposite end in the well known manner.
  • a conventional cylinder liner 16 is provided for guiding the reciprocating action of piston 10.
  • the piston 10 includes an upper crown portion 18 and a lower skirt portion 20 of the well known type which includes partial skirts 20a 20b.
  • the crown portion 18 includes inner and outer wall portions 22, 24 respectively, defining an annular groove 26 closed at an upper end 28 and having an opening at a lower end 30.
  • the outer wall 24 includes conventional grooves 32 carrying compression rings 34.
  • An annular relief 36 is provided between rings 34 and a groove 38 is provided below rings 34 for carrying an oil control ring 40.
  • the outer wall 24 terminates at an end surface 42 just below the oil control ring 40.
  • the skirt portion 20 is just below the end surface 42 and spaced therefrom by an opening 44.
  • the inner wall 22 separates the groove 26 from crown 18 and cooling dome 46.
  • the wall 22 extends downwardly past the opening 44 to the pin boss 15.
  • the piston 10 may be cast from iron to form a thin-walled, light-weight, one-piece unit.
  • upper dome portion 18 can be cast separately from lower skirt portion 20 and the portions could then be welded together at 19 by a brazing process if desired.
  • a conventional piston cooling jet is fixedly positioned so as to be adjacent lower skirt 20 when the piston is in its lowest position for spraying a jet of fluid such as lubricating oil upwardly into annular groove 26 and cooling dome 46 as is known.
  • the jet, Figures 9, 10 constantly sprays the oil upwardly to the underside of the crown 18.
  • the spray is directed so that when the piston is bottom dead center or when the reciprocating piston 10 is at its lowermost position relative to the fixed jet 48, the spray bathes and cools groove 26 which has become heated due to proximity to crown 18.
  • the spray bathes and cools dome 46. This momentary cooling is advantageous but does not continuously cool both the groove 26 and the dome 46.
  • a splash sill or ledge 50 is provided as a means for trapping oil in the groove 26.
  • Sill 50 is formed as a substantially annular ledge extending radially outwardly from inner wall 22 adjacent opening 44 and reaching toward outer wall 24.
  • Ledge or sill 50 also extends upwardly towards the crown 18.
  • Ledge 50 terminates at lip portion 52 which is spaced from end surface 42.
  • the preferred configuration for ledge 50 is illustrated in Figure 5.
  • a sloping upper surface 56 is provided on ledge 50.
  • Surface 56 may be of a substantially constant slope such as that shown in Figures 5-7 or may be curved or cup-shaped such as is shown in Figure 8.
  • Surface 56 provides ledge 50 with angular disposition relative to inner wall 22.
  • ledge 50 and wall 22 cooperate to form a trough-like fluid trap.
  • ledge 50 is most advantageously situated as described above, that is, extending outwardly from inner wall 22 and sloped upwardly toward crown 18.
  • ledge 50 is directly in the oil jet spray path extending between jet 48 and groove 26. Therefore, the ledge 50 includes a slot 60 as a means for permitting the pressurized stream to be directed past ledge 50 and into groove 26, see Figures 2 and 4.
  • there are two slots 60 180 degrees diametrically opposed) for the purpose of providing a piston which can be installed without concern as to the location of slot 60.
  • one slot 60 is sufficient.
  • Piston 10 reciprocates downwardly to bottom dead center and jet 48 directs lubricating oil upwardly past ledge 50 via slot 60 into groove 26.
  • the oil bathes and momentarily cools groove 26, thereafter drains downwardly and is trapped by ledge 50 as piston 10 accelerates upwardly to its top dead center positon where the oil then bathes the dome 46.
  • piston 10 begins to reverse direction at the top dead center position and reciprocates downward again, oil trapped between surface 56 and inner wall 22 tends to continue upwardly and is thus splashed into groove 26 thus supplementing the direct cooling from the jet spray which thereafter occurs when piston 10 once again reaches bottom dead center.

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)
EP79901340A 1979-04-23 1980-11-04 Oil cooled piston Expired EP0027445B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1979/000259 WO1980002308A1 (en) 1979-04-23 1979-04-23 Oil cooled piston

Publications (3)

Publication Number Publication Date
EP0027445A4 EP0027445A4 (en) 1981-02-20
EP0027445A1 EP0027445A1 (en) 1981-04-29
EP0027445B1 true EP0027445B1 (en) 1983-07-20

Family

ID=22147567

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79901340A Expired EP0027445B1 (en) 1979-04-23 1980-11-04 Oil cooled piston

Country Status (4)

Country Link
EP (1) EP0027445B1 (enrdf_load_stackoverflow)
JP (1) JPS6329104B2 (enrdf_load_stackoverflow)
DE (1) DE2965895D1 (enrdf_load_stackoverflow)
WO (1) WO1980002308A1 (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3830033A1 (de) * 1987-11-30 1989-06-08 Mahle Gmbh Gebauter, oelgekuehlter kolben fuer verbrennungsmotoren
DE4331649A1 (de) * 1993-09-17 1995-03-23 Kloeckner Humboldt Deutz Ag Kolbenkühlung einer Brennkraftmaschine
DE10322921A1 (de) * 2003-05-21 2004-12-16 Mahle Gmbh Verfahren zur Herstellung eines einteiligen Kolbens für einen Verbrennungsmotor
DE19758631B4 (de) * 1996-08-07 2006-08-03 Cummins Inc., Columbus Motorkolben
EP3036419B1 (de) 2013-08-23 2018-04-11 Mahle International GmbH Anordnung aus einem kolben und einer anspritzdüse für einen verbrennungsmotor
US10865734B2 (en) 2017-12-06 2020-12-15 Ai Alpine Us Bidco Inc Piston assembly with offset tight land profile

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3508405A1 (de) * 1984-03-13 1985-10-03 Günter Elsbett Brennkraftmaschine mit reduzierter schall- und waermeemission
DE4340891A1 (de) * 1993-12-01 1995-06-08 Mahle Gmbh Hubkolben für Verbrennungsmotoren aus insbesondere Leichtmetall
US5839352A (en) * 1996-08-07 1998-11-24 Cummins Engine Company, Inc. Articulated piston
US6260472B1 (en) * 1998-07-28 2001-07-17 Federal-Mogul World Wide, Inc. One-piece integral skirt piston and method of making the same
US6155157A (en) * 1998-10-06 2000-12-05 Caterpillar Inc. Method and apparatus for making a two piece unitary piston
DE19846152A1 (de) * 1998-10-07 2000-04-13 Mahle Gmbh Kolben mit Kolbengrundkörper aus geschmiedetem Stahl und einem Kühlkanal
DE60121308T2 (de) * 2000-03-28 2007-06-28 Federal-Mogul Corp., Southfield Hochleistungskolben mit öldeflektor
DE10064367B4 (de) * 2000-12-21 2005-02-17 Ks Kolbenschmidt Gmbh Kolben mit geschmiedeten und eingeschweißten Bolzenaugen
US6526871B1 (en) * 2001-08-24 2003-03-04 Federal-Mogul World Wide, Inc. Monobloc piston for diesel engines
DE10244511A1 (de) * 2002-09-25 2004-04-15 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
DE10244512A1 (de) * 2002-09-25 2004-04-15 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
DE10325917A1 (de) 2003-06-07 2005-03-31 Mahle Gmbh Kolben für einen Verbrennungsmotor und Gießverfahren zu dessen Herstellung
US7086354B2 (en) 2003-10-29 2006-08-08 Deere & Company Cooling nozzle mounting arrangement
FR2896535B1 (fr) * 2006-01-26 2008-05-02 Vianney Rabhi Dispositif de refroidissement et de lubrification par projection d'huile pour moteur a rapport volumetrique variable
US7918155B2 (en) * 2007-12-12 2011-04-05 Mahle International Gmbh Piston with a cooling gallery
US8065985B2 (en) 2009-05-04 2011-11-29 Federal-Mogul Corporation Piston having a central cooling gallery with a contoured flange
CN109838298B (zh) * 2019-03-11 2021-02-23 潍柴动力股份有限公司 一种商用车活塞冷却喷嘴控制方法及控制系统

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB617224A (en) * 1946-08-21 1949-02-02 Harry Ralph Ricardo Improvements in or relating to pistons
GB776273A (en) * 1954-02-23 1957-06-05 Ruston & Hornsby Ltd Improvements in or relating to pistons for internal combustion engines
US3190273A (en) * 1964-01-03 1965-06-22 Continental Aviat & Eng Corp Piston for internal combustion engine
US3336844A (en) * 1964-08-25 1967-08-22 Cornet Andre Pistons for engines with a high thermal load
DE1476393A1 (de) * 1964-04-16 1969-04-24 Maschf Augsburg Nuernberg Ag Fluessigkeitsgekuehlter Kolben
US4056044A (en) * 1975-11-12 1977-11-01 Caterpillar Tractor Co. Oil cooled piston
US4129108A (en) * 1975-09-30 1978-12-12 Elsbett L Piston for internal combustion engines
US4175502A (en) * 1977-05-25 1979-11-27 Karl Schmidt Gmbh Liquid-cooled, assembled piston for internal combustion engines

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR499517A (fr) * 1918-01-19 1920-02-13 Marcel Billon Dispositif d'étanchéité des segments des pistons des moteurs à explosions
GB223333A (en) * 1923-07-28 1924-10-23 Beardmore William & Co Improvements in packing rings for pistons
FR640162A (fr) * 1926-05-15 1928-07-07 Segments de pistons
FR762862A (fr) * 1933-10-24 1934-04-19 Perfectionnements aux segments d'étanchéité pour pistons
DE962298C (de) * 1953-02-22 1957-04-18 Kloeckner Humboldt Deutz Ag Dichtungsringanordnung fuer Arbeitskolben von Brennkraftmaschinen
US3097855A (en) * 1959-06-26 1963-07-16 George H Allen Sealing arrangement
DE2140824C2 (de) * 1971-08-14 1983-06-01 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Ölgekühlter Kolben für Brennkraftmaschinen
JPS5447937A (en) * 1977-09-24 1979-04-16 Izumi Jidoushiya Kougiyou Kk Builttup piston for cooling

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB617224A (en) * 1946-08-21 1949-02-02 Harry Ralph Ricardo Improvements in or relating to pistons
GB776273A (en) * 1954-02-23 1957-06-05 Ruston & Hornsby Ltd Improvements in or relating to pistons for internal combustion engines
US3190273A (en) * 1964-01-03 1965-06-22 Continental Aviat & Eng Corp Piston for internal combustion engine
DE1476393A1 (de) * 1964-04-16 1969-04-24 Maschf Augsburg Nuernberg Ag Fluessigkeitsgekuehlter Kolben
US3336844A (en) * 1964-08-25 1967-08-22 Cornet Andre Pistons for engines with a high thermal load
US4129108A (en) * 1975-09-30 1978-12-12 Elsbett L Piston for internal combustion engines
US4056044A (en) * 1975-11-12 1977-11-01 Caterpillar Tractor Co. Oil cooled piston
US4175502A (en) * 1977-05-25 1979-11-27 Karl Schmidt Gmbh Liquid-cooled, assembled piston for internal combustion engines

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3830033A1 (de) * 1987-11-30 1989-06-08 Mahle Gmbh Gebauter, oelgekuehlter kolben fuer verbrennungsmotoren
DE3830033C2 (de) * 1987-11-30 1998-05-07 Mahle Gmbh Gebauter, ölgekühlter Tauchkolben für Verbrennungsmotoren
DE4331649A1 (de) * 1993-09-17 1995-03-23 Kloeckner Humboldt Deutz Ag Kolbenkühlung einer Brennkraftmaschine
DE19758631B4 (de) * 1996-08-07 2006-08-03 Cummins Inc., Columbus Motorkolben
DE10322921A1 (de) * 2003-05-21 2004-12-16 Mahle Gmbh Verfahren zur Herstellung eines einteiligen Kolbens für einen Verbrennungsmotor
EP3036419B1 (de) 2013-08-23 2018-04-11 Mahle International GmbH Anordnung aus einem kolben und einer anspritzdüse für einen verbrennungsmotor
US10865734B2 (en) 2017-12-06 2020-12-15 Ai Alpine Us Bidco Inc Piston assembly with offset tight land profile

Also Published As

Publication number Publication date
EP0027445A1 (en) 1981-04-29
EP0027445A4 (en) 1981-02-20
WO1980002308A1 (en) 1980-10-30
JPS6329104B2 (enrdf_load_stackoverflow) 1988-06-10
JPS56500419A (enrdf_load_stackoverflow) 1981-04-02
DE2965895D1 (en) 1983-08-25

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