EP0027445A1 - Piston refroidi par huile. - Google Patents

Piston refroidi par huile.

Info

Publication number
EP0027445A1
EP0027445A1 EP79901340A EP79901340A EP0027445A1 EP 0027445 A1 EP0027445 A1 EP 0027445A1 EP 79901340 A EP79901340 A EP 79901340A EP 79901340 A EP79901340 A EP 79901340A EP 0027445 A1 EP0027445 A1 EP 0027445A1
Authority
EP
European Patent Office
Prior art keywords
wall
annular
piston
ledge
fluid
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
EP79901340A
Other languages
German (de)
English (en)
Other versions
EP0027445A4 (fr
EP0027445B1 (fr
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/fr
Publication of EP0027445A1 publication Critical patent/EP0027445A1/fr
Application granted granted Critical
Publication of EP0027445B1 publication Critical patent/EP0027445B1/fr
Expired legal-status Critical Current

Links

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 expan- sible chamber devices and more particularly to pistons having lubricating means including chambers or pockets.
  • an oil cooled piston including a crown having inner and outer annular walls.
  • the walls define an annular groove including an annular opening.
  • the outer wall has an end surface adjacent the opening.
  • Means are provided for trapping fluid.
  • Such means includes a substan ⁇ tially annular ledge extending from the inner wall toward the outer wall terminating at a lip. The lip is spaced from the end surface.
  • a sloping surface on the ledge extends between the inner wall and the lip and is adjacent the annular opening.
  • FIGURE 1 is an enlarged cross-sectional view illustrating an embodiment of the present invention
  • FIGURE 2 is a bottom plan view taken along the line II-II of Figure 1;
  • FIGURE 3 is another enlarged cross-sectional view illustrating an embodiment of the present invention.
  • FIGURE 4 is a view taken along the line IV-IV of Figure 3;
  • FIGURE 5 is an enlarged partial cross-sectional view illustrating the preferred embodiment of this invention.
  • FIGURES 6-8 are enlarged partial cross-section- al views illustrating alternative embodiments of this invention.
  • FIGURES 9,10 are enlarged partial cross- sectional views illustrating a cooling oil spray during the piston stroke. Best Mode for Carrying Out the Invention
  • a piston is generally designated 10, Fig. 1, for reciprocating motion due to pin 12 and connecting rod 14 attached to piston boss 15 at one end 17 and to a crankshaft (not shown) at an opposite end in the well known manner. Also, a conventional cylinder liner 16 is provided for guiding the reciprocating action of piston 10.
  • Piston 10 includes an upper crown portion 18 and a lower skirt portion 20.
  • the lower skirt portion 20 is well known and includes partial skirts 20a, 20b.
  • 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 open ⁇ ing at a lower end 30.
  • Outer wall 24 includes conven ⁇ tional grooves 32 carrying compression rings 34.
  • An annular relief 36 is provided between rings 34 and a relief 38 is provided below rings 34 for carrying oil control ring 40.
  • Outer wall 24 terminates at end surface 42 just below oil control ring 40. Skirt portion 20 is just below end surface 42 and spaced therefrom by an opening 44. Inner wall 22 separates groove 26 from crown
  • Wall 22 extends downwardly past opening 44 to pin boss 15.
  • Piston 10 is preferably cast from iron to form a thin-walled, light-weight, one-piece unit.
  • upper dome portion 18 could 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 48 is fix ⁇ edly positioned adjacent lower skirt 20 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 When the piston 10 is at top dead center, 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.
  • An improved splash sill 50 is provided as a means for trapping oil.
  • 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 axially upwardly toward 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 Fig. 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 Figs. 5-7 or may be curved or cup-shaped such as is shown in Fig. 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. However, situated as such, ledge 50 is directly in the oil jet spray path extend ⁇ ing between jet 48 and groove 26.
  • 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 Figs. 2 and 4.
  • slot 60 is formed in duplicate (two slots 60, 180 de ⁇ grees diametrically opposed) for the purpose of pro ⁇ viding a piston which can be installed without concern as to the location of slot 60.
  • only one jet 48 is usually provided, only one slot 60 is required.
  • 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 position where the oil then bathes the dome 46.
  • the foregoing has described an oil cooled piston having a ledge or splash sill which does not interfere with the spray of oil into the cooling groove and which better directs trapped oil back into the groove to supplement the spray.

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)

Abstract

Une chaleur sensible est produite au niveau de la partie de la couronne (18) d'un piston (10) Un fluide de refroidissement a ete dirige vers les cavites (46) en dessous de la couronne (18). Cependant, en des points critiques du cycle du piston, le fluide sort des cavites a cause des forces de gravite. Un piston refroidi par huile (10) comprend un clapet de fluide (50) adjacent a la couronne (18). Une certaine quantite de fluide de refroidissement est emprisonne lorsqu'il sort et il est retenu pour ameliorer le refroidissement de la couronne (18). Le clapet de fluide (50) comporte une fente (60) permettant une atomisation par jet d'huile de lubrification dirigee au-dela du clapet (50) vers les cavites adjacentes au-dessous de la couronne (18).
EP79901340A 1979-04-23 1980-11-04 Piston refroidi par huile Expired EP0027445B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1979/000259 WO1980002308A1 (fr) 1979-04-23 1979-04-23 Piston refroidi par huile

Publications (3)

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

Family

ID=22147567

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79901340A Expired EP0027445B1 (fr) 1979-04-23 1980-11-04 Piston refroidi par huile

Country Status (4)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6938603B2 (en) 2003-05-21 2005-09-06 Mahle Gmbh Method for the production of a one-piece piston for an internal combustion engine
US7213562B2 (en) 2003-06-07 2007-05-08 Mahle Gmbh Piston for a combustion engine and casting method for the production thereof
FR2896535A1 (fr) * 2006-01-26 2007-07-27 Vianney Rabhi Dispositif de refroidissement et de lubrification par projection d'huile pour moteur a rapport volumetrique variable

Families Citing this family (20)

* 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
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
DE4340891A1 (de) * 1993-12-01 1995-06-08 Mahle Gmbh Hubkolben für Verbrennungsmotoren aus insbesondere Leichtmetall
DE19758631B4 (de) * 1996-08-07 2006-08-03 Cummins Inc., Columbus Motorkolben
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
WO2001073275A1 (fr) * 2000-03-28 2001-10-04 Federal-Mogul Corporation Piston à grande puissance pourvu d'un déflecteur d'huile
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
US7086354B2 (en) 2003-10-29 2006-08-08 Deere & Company Cooling nozzle mounting arrangement
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
DE102013013962A1 (de) 2013-08-23 2015-02-26 Mahle International Gmbh Baueinheit 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
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

Family Cites Families (16)

* 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
GB617224A (en) * 1946-08-21 1949-02-02 Harry Ralph Ricardo Improvements in or relating to pistons
DE962298C (de) * 1953-02-22 1957-04-18 Kloeckner Humboldt Deutz Ag Dichtungsringanordnung fuer Arbeitskolben von Brennkraftmaschinen
GB776273A (en) * 1954-02-23 1957-06-05 Ruston & Hornsby Ltd Improvements in or relating to pistons for internal combustion engines
US3097855A (en) * 1959-06-26 1963-07-16 George H Allen Sealing arrangement
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
DE2140824C2 (de) * 1971-08-14 1983-06-01 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Ölgekühlter Kolben für Brennkraftmaschinen
DE2543478C2 (de) * 1975-09-30 1983-01-05 Günter 8543 Hilpoltstein Elsbett Kolben für Brennkraftmaschinen, insb. Dieselmotoren
US4056044A (en) * 1975-11-12 1977-11-01 Caterpillar Tractor Co. Oil cooled piston
DE2723619C2 (de) * 1977-05-25 1984-10-04 Karl Schmidt Gmbh, 7107 Neckarsulm Mehrteiliger, flüssigkeitsgekühlter Kolben für Brennkraftmaschinen
JPS5447937A (en) * 1977-09-24 1979-04-16 Izumi Jidoushiya Kougiyou Kk Builttup piston for cooling

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6938603B2 (en) 2003-05-21 2005-09-06 Mahle Gmbh Method for the production of a one-piece piston for an internal combustion engine
US7213562B2 (en) 2003-06-07 2007-05-08 Mahle Gmbh Piston for a combustion engine and casting method for the production thereof
FR2896535A1 (fr) * 2006-01-26 2007-07-27 Vianney Rabhi Dispositif de refroidissement et de lubrification par projection d'huile pour moteur a rapport volumetrique variable
WO2007085736A1 (fr) * 2006-01-26 2007-08-02 Vianney Rabhi Dispositif de refroidissement et de lubrification par projection d'huile pour moteur a rapport volumetrique variable

Also Published As

Publication number Publication date
JPS6329104B2 (fr) 1988-06-10
EP0027445A4 (fr) 1981-02-20
EP0027445B1 (fr) 1983-07-20
DE2965895D1 (en) 1983-08-25
WO1980002308A1 (fr) 1980-10-30
JPS56500419A (fr) 1981-04-02

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