DE3834852A1 - COOLED TWO-PIECE SUBMERSIBLE PISTON - Google Patents

COOLED TWO-PIECE SUBMERSIBLE PISTON

Info

Publication number
DE3834852A1
DE3834852A1 DE3834852A DE3834852A DE3834852A1 DE 3834852 A1 DE3834852 A1 DE 3834852A1 DE 3834852 A DE3834852 A DE 3834852A DE 3834852 A DE3834852 A DE 3834852A DE 3834852 A1 DE3834852 A1 DE 3834852A1
Authority
DE
Germany
Prior art keywords
piston
cooling oil
shaft
piston pin
cooled
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Withdrawn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
DE3834852A
Other languages
German (de)
Inventor
Josip Zvonkovic
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
Priority to DE3834852A priority Critical patent/DE3834852A1/en
Priority to PCT/DE1989/000546 priority patent/WO1990004094A1/en
Publication of DE3834852A1 publication Critical patent/DE3834852A1/en
Withdrawn legal-status Critical Current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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0696—W-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder wall
    • 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
    • F02F3/0069—Multi-part pistons the crown and skirt being interconnected by the gudgeon pin
    • 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
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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

A cooled two-piece trunk piston for internal combustion engines has a cast or pressed upper part that contains the piston ring groove and the piston pin hub, as well as a rod hingedly connected to the upper part exclusively by means of a piston pin. The upper part (1) is provided with a radial cooling oil channel (3) closed on all sides by the base material of the upper part of the piston, inside the ring groove section, into which the cooling oil is introduced in any appropriate manner and from which it is evacuated through at least one cooling oil outlet (5, 6) arranged in the direction of the piston pin between the piston pin hubs of the upper part of the piston. The cooling oil outlet(s) (5, 6) open into the free inner space of the rod (2). An oil collector (7, 8) arranged underneath the cooling oil outlet(s) (5, 6) is formed in the upper area of the rod (2) and directs the oil coming out the outlet towards the centre of the bottom of the upper part (1) of the piston.

Description

Die Erfindung betrifft einen zweiteiligen Tauchkolben nach dem Oberbegriff des Patentsnspruchs.The invention relates to a two-part plunger according to the preamble of the patent claim.

Ein besonderer Vorteil derartiger zweiteiliger Kolben besteht darin, für das der Verbrennungswärme ausge­ setzte Kolbenoberteil ein im Vergleich zu dem Materi­ al des Kolbenschaftes temperaturfesteres Material einsetzen zu können. Als derartige temperaturfeste Materialien kommen beispielsweise Stahl und Sphäro­ gußeisen in Frage. Der Schaft kann dagegen zur Erzie­ lung eines geringen Gewichtes und einer guten Wärme­ leitfähigkeit aus Leichtmetall bestehen.A particular advantage of such two-part pistons consists of the combustion heat used piston top in comparison to the materi al of the piston skirt more temperature-resistant material to be able to use. As such temperature resistant Materials come for example steel and sphero cast iron in question. The shaft can be used for education low weight and good warmth conductivity made of light metal.

Ein derartiger Kolben ist beispielsweise aus US 40 56 044 bekannt. Bei dem dortigen Kolben wird das Kolbe­ noberteil durch aus dem Kurbelraum eingespritztes Öl gekühlt. Notwendig ist eine Kühlung insbesondere in dem radial innerhalb der Kolbenringnuten unterhalb des Kolbenbodens liegenden äußeren Ringraum des Kol­ benoberteiles. Um hier eine möglichst intensive Küh­ lung zu erhalten, ist an dem oberen Schaftende eine diesen äußeren Ringraum des Kolbenoberteiles zum Schaft des Kolbens hin abdeckende Öl-Fangrinne ange­ formt. Das aus dem Kurbelraum eingespritzte Kühlöl gelangt außer in den äußeren Ringraum des Kolbenober­ teiles auch in den zentralen unterhalb des Kolbenbo­ dens liegenden Bereich des Oberteiles.Such a piston is for example from US 40 56 044 known. With the piston there, the piston becomes Upper part due to oil injected from the crankcase chilled. Cooling is particularly necessary in the radially inside the piston ring grooves below the outer annular space of the piston top part. In order to make the cooling as intensive as possible maintenance is one at the top of the shaft this outer annular space of the upper piston part Oil trap covering the shaft of the piston forms. The cooling oil injected from the crankcase  gets into the outer annulus of the upper piston some also in the central one below the piston chamber the lying area of the upper part.

Bei Verbrennungsmotoren, insbesondere Dieselmotoren, mit hoher Leistung reicht die beschriebene Kühlung des Kolbenoberteiles nicht aus. Hier eine Verbesse­ rung zu finden, bei der einerseits der äußere inner­ halb der Ringnuten des Kolbenoberteiles liegende Ringraum und andererseits auch das Zentrum des Bodens des Kolbenoberteiles ausreichend gekühlt sind, ist Aufgabe der Erfindung.In internal combustion engines, especially diesel engines, the described cooling is sufficient at high power the upper part of the piston. Here's an improvement to find where the outer inner half of the ring grooves of the upper piston part Annulus and on the other hand also the center of the bottom of the piston top are sufficiently cooled Object of the invention.

Gelöst wird diese Aufgabe durch eine Ausführung des Kolbens nach den kennzeichnenden Merkmalen des Pa­ tentanspruchs.This task is solved by executing the Piston according to the characteristic features of Pa entitlement.

Die Anordnung von an dem oberen Schaftende unterhalb der Ölablauföffnungen des geschlossenen Kühlölringka­ nals angeordneten Anfangsschalen sorgt dafür, daß das ablaufende Kühlöl vor Rücktritt in den Kurbelraum an den im Zentrum des Kolbenoberteiles liegenden Boden­ bereich des Kolbenoberteiles gelenkt wird. Dadurch erhält auch dieser Bodenbereich auch ohne direktes Einspritzen von Kühlöl auf recht einfache Weise die notwendige Kühlung.The arrangement from below on the upper shaft end the oil drain openings of the closed cooling oil ring nals arranged starting shells ensures that the draining cooling oil before stepping back into the crankcase the bottom lying in the center of the upper part of the piston area of the upper piston part is steered. Thereby this floor area also receives without direct Injecting cooling oil in a very simple way necessary cooling.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt. Es zeigenAn embodiment of the invention is in the Drawing shown. Show it

Fig. 1 einen Schnitt durch einen zweiteiligen Kolben in Richtung der Kolbenbolzenachse, Fig. 1 shows a section through a two-piece piston in the direction of the piston pin axis,

Fig. 2 einen Schnitt durch den Kolben nach Linie II-II in Fig. 1, Fig. 2 shows a section through the flask according to line II-II in Fig. 1,

Fig. 3 einen Schnitt durch den Kolben nach Linie III-III in Fig. 1. Fig. 3 is a section through the flask according to line III-III in FIG. 1.

Der zweiteilige Kolben besteht aus einem Kolbenober­ teil 1 aus Stahl und einem Schaft 2 aus Aluminium, wobei diese beiden Teile über einen nicht dargestell­ ten Kolbenbolzen gelenkig miteinander verbunden sind.The two-part piston consists of a piston upper part 1 made of steel and a shaft 2 made of aluminum, these two parts being articulated via a piston pin, not shown.

In dem Kolbenoberteil 1 ist in dem radial innerhalb des Kolbenringnutenbereiches ein geschlossener Küh­ lölringkanal 3 vorgesehen. In den Ringkanal 3 wird das Kühlöl vom Kurbelraum aus durch eine im Boden des Ringkanales befindliche Öffnung 4 eingespritzt. Die Abfuhr des Kühlöles aus dem Ringkanal 3 erfolgt über Ablauföffnungen 5 und 6. Unterhalb dieser Ablauföff­ nungen sind am oberen Bereich des Schaftes 2 jeweils Auffangschalen 7 und 8 angeformt. Das aus dem Ringka­ nal 3 abfließende Öl wird mit Hilfe dieser Auffang­ schalen an das Zentrum des Bodens des Kolbenobertei­ les zu dessen Kühlung geleitet und gelangt erst von dort zurück in den Kurbelraum.In the upper piston part 1 , a closed cooling oil channel 3 is provided in the radially inside the piston ring groove area. The cooling oil is injected into the ring channel 3 from the crank chamber through an opening 4 located in the bottom of the ring channel. The cooling oil is removed from the ring channel 3 via drain openings 5 and 6 . Below these outflow openings, collecting trays 7 and 8 are integrally formed on the upper region of the shaft 2 . The oil flowing out of the ring channel 3 is passed with the help of these collecting trays to the center of the bottom of the piston upper part for cooling thereof and only gets back from there into the crank chamber.

Durch die erfindungsgemäße Lösung wird erreicht, daß eine hervorragende Shaker-Kühlung in dem äußeren Ringraum radial innerhalb der Ringnutenpartie bei gleichzeitig ausreichender Kühlung des Kolbenboden­ zentrums mit konstruktiv einfachen Mitteln möglich ist.The solution according to the invention ensures that excellent shaker cooling in the outer Annulus radially inside the annular groove section sufficient cooling of the piston crown  center possible with structurally simple means is.

Claims (1)

Gekühlter zweiteiliger Tauchkolben für Verbrennungs­ motoren mit einem die Kolbenringnuten und Kolbenbol­ zennaben enthaltenden Kolbenoberteil und einem mit diesem ausschließlich über einen Kolbenbolzen gelen­ kig verbundenen Schaft, dadurch gekennzeichnet, daß das Kolbenoberteil (1) radial innerhalb der Rin­ gnutenpartie mit einem geschlossenen Kühlölringkanal (3) versehen ist, in den das Kühlöl auf beliebige Weise eingeführt und durch mindestens eine in Kolben­ bolzenrichtung zwischen den Bolzennaben des Kolbeno­ berteils angeordnete in den freien Innenraum des Schaftes (2) gerichtete Ablauföffnung (5, 6) abge­ führt wird und daß unterhalb der mindestens einen Kühlölablauföffnung (5, 6) eine das aus der Öffnung austretende Öl zum Zentrum des Bodens des Kolbenober­ teils (1) lenkende Auffangschale (7, 8) an den oberen Bereich des Schaftes (2) angeformt ist.Cooled two-part plunger for internal combustion engines with a piston upper part containing the piston ring grooves and piston pin bosses and a shaft connected to this exclusively by a piston pin kig connected shaft, characterized in that the piston upper part ( 1 ) radially inside the ring groove part with a closed cooling oil ring channel ( 3 ) is, in which the cooling oil is introduced in any way and by at least one in the piston pin direction between the pin bosses of the piston top part arranged in the free interior of the shaft ( 2 ) directed drain opening ( 5 , 6 ) leads abge and that below the at least one cooling oil drain opening ( 5 , 6 ) an oil emerging from the opening to the center of the bottom of the piston upper part ( 1 ) directing drip tray ( 7 , 8 ) is formed on the upper region of the shaft ( 2 ).
DE3834852A 1988-10-13 1988-10-13 COOLED TWO-PIECE SUBMERSIBLE PISTON Withdrawn DE3834852A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE3834852A DE3834852A1 (en) 1988-10-13 1988-10-13 COOLED TWO-PIECE SUBMERSIBLE PISTON
PCT/DE1989/000546 WO1990004094A1 (en) 1988-10-13 1989-08-23 Cooled two-piece trunk piston

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3834852A DE3834852A1 (en) 1988-10-13 1988-10-13 COOLED TWO-PIECE SUBMERSIBLE PISTON

Publications (1)

Publication Number Publication Date
DE3834852A1 true DE3834852A1 (en) 1990-04-19

Family

ID=6365013

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3834852A Withdrawn DE3834852A1 (en) 1988-10-13 1988-10-13 COOLED TWO-PIECE SUBMERSIBLE PISTON

Country Status (2)

Country Link
DE (1) DE3834852A1 (en)
WO (1) WO1990004094A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19603589A1 (en) * 1996-02-01 1997-08-07 Kolbenschmidt Ag Pendulum shaft piston
DE10230746A1 (en) * 2002-07-09 2004-01-29 Ks Kolbenschmidt Gmbh Piston for IC engine has coolant channel in its base which opens into channel communicating with curved distributing surface above bore for bolt which attaches it to connecting rod
DE19758631B4 (en) * 1996-08-07 2006-08-03 Cummins Inc., Columbus Articulated piston for heavy duty diesel engines - has second longitudinal plane, perpendicular to the first to divide piston skirt into four quarters, one containing an inlet through which a cooling medium, can pass and impinge against the hollow cavity of the piston crown
CN111622857A (en) * 2019-02-28 2020-09-04 强莉莉 Single oil chamber piston

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7162990B1 (en) 2005-12-29 2007-01-16 Mahle Technology, Inc. Two-part piston for an internal combustion engine
DE102011119525A1 (en) 2011-11-26 2013-05-29 Mahle International Gmbh Piston for an internal combustion engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1905609A1 (en) * 1969-02-05 1970-08-20 Schmidt Gmbh Karl Liquid-cooled piston for internal combustion engines
US4056044A (en) * 1975-11-12 1977-11-01 Caterpillar Tractor Co. Oil cooled piston
DE2717692A1 (en) * 1977-04-21 1978-10-26 Elsbett L PISTONS FOR RECEPTACLE COMBUSTION MACHINES, IN PARTICULAR DIESEL ENGINES
DE3732925C1 (en) * 1987-09-30 1988-12-08 Mahle Gmbh Cooled plunger for internal combustion engines

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2125687A5 (en) * 1971-02-16 1972-09-29 Semt
US4180027A (en) * 1977-07-20 1979-12-25 Mack Trucks, Inc. Two-piece oil-cooled piston
DE2919638A1 (en) * 1979-05-16 1980-11-20 Schmidt Gmbh Karl PISTON FOR INTERNAL COMBUSTION ENGINES
DE3511835A1 (en) * 1985-03-30 1986-10-09 M.A.N.- B & W Diesel GmbH, 8900 Augsburg Oil cooled trunk piston of an internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1905609A1 (en) * 1969-02-05 1970-08-20 Schmidt Gmbh Karl Liquid-cooled piston for internal combustion engines
US4056044A (en) * 1975-11-12 1977-11-01 Caterpillar Tractor Co. Oil cooled piston
DE2717692A1 (en) * 1977-04-21 1978-10-26 Elsbett L PISTONS FOR RECEPTACLE COMBUSTION MACHINES, IN PARTICULAR DIESEL ENGINES
DE3732925C1 (en) * 1987-09-30 1988-12-08 Mahle Gmbh Cooled plunger for internal combustion engines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19603589A1 (en) * 1996-02-01 1997-08-07 Kolbenschmidt Ag Pendulum shaft piston
DE19758631B4 (en) * 1996-08-07 2006-08-03 Cummins Inc., Columbus Articulated piston for heavy duty diesel engines - has second longitudinal plane, perpendicular to the first to divide piston skirt into four quarters, one containing an inlet through which a cooling medium, can pass and impinge against the hollow cavity of the piston crown
DE10230746A1 (en) * 2002-07-09 2004-01-29 Ks Kolbenschmidt Gmbh Piston for IC engine has coolant channel in its base which opens into channel communicating with curved distributing surface above bore for bolt which attaches it to connecting rod
DE10230746B4 (en) * 2002-07-09 2015-10-01 Ks Kolbenschmidt Gmbh piston
CN111622857A (en) * 2019-02-28 2020-09-04 强莉莉 Single oil chamber piston

Also Published As

Publication number Publication date
WO1990004094A1 (en) 1990-04-19

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