WO2017133949A1 - Piston d'un moteur à combustion interne - Google Patents

Piston d'un moteur à combustion interne Download PDF

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Publication number
WO2017133949A1
WO2017133949A1 PCT/EP2017/051549 EP2017051549W WO2017133949A1 WO 2017133949 A1 WO2017133949 A1 WO 2017133949A1 EP 2017051549 W EP2017051549 W EP 2017051549W WO 2017133949 A1 WO2017133949 A1 WO 2017133949A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
cooling
channel elements
channel
dome
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.)
Ceased
Application number
PCT/EP2017/051549
Other languages
German (de)
English (en)
Inventor
Rainer Scharp
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 WO2017133949A1 publication Critical patent/WO2017133949A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/18—Pistons  having cooling means the means being a liquid or solid coolant, e.g. sodium, in a closed chamber in piston

Definitions

  • the present invention relates to a piston of an internal combustion engine with a piston skirt and a piston head, in which a cooling channel for
  • Receiving a cooling medium is provided, according to the preamble of claim 1.
  • the invention also relates to an internal combustion engine with at least one such piston.
  • outgoing oblique bore can be made.
  • this it is, for example.
  • the present invention therefore deals with the problem of an improved or at least one piston of the generic type specify alternative embodiment, which avoids the disadvantages of the prior art in particular.
  • G thinkkerns which in particular also allows a non-linear course of the individual channel elements.
  • the dome not only two but, for example, three or more channel elements are provided, which can subsequently be closed with only a single, common closure element , This makes it possible to significantly reduce the cost of closing compared to the piston known from the prior art, since in this all channel elements had to be closed separately.
  • Provision of a plurality of starting in the region of the cathedral channel elements can also be fluidly connected to each other and thereby allow an exchange of the cooling medium disposed therein through the recess with each other.
  • the piston according to the invention usually in a reciprocating internal combustion engine is used, it has in a known manner a piston skirt with a peripheral annular part having piston head, in which an at least partially encircling cooling channel is provided for receiving a cooling medium.
  • the piston head itself has a combustion bowl with the particular central dome. According to the invention, the at least two channel elements which are provided by the dome are now provided
  • Closing closure element together whereby the provision of a number of the channel elements corresponding number of closure elements is no longer required.
  • the convergence of the at least two channel elements in the area of the dome and the arrangement of their filling openings in the region of the dome they can also be filled together and therefore much easier.
  • the dome has a recess into which the at least two channel elements open.
  • a recess offers the great advantage that on the one hand the filling of the cooling medium significantly simplified (if it is a closed cooling system) and on the other hand by a corresponding closure element also allows a fluid exchange between the individual channel elements in the operating state.
  • Closure element can thus be designed alternatively such that it in the assembled state in the region of the dome a fluidic separation of the individual Channel elements causes each other, or allows a fluidic connection between the individual channel elements in the region of the dome, thereby enabling a particularly uniform and homogeneous additional cooling.
  • the at least two channel elements run obliquely to the longitudinal axis of the piston, in particular even along a combustion bowl trough.
  • a particularly targeted cooling of the combustion bowl trough bottom can be made possible.
  • the course of the individual channel elements is usually linear, wherein, of course, curvy courses are conceivable, especially if the individual channel elements are not made by drilling, but by a casting core.
  • the closure element is welded to the dome or an inner wall of the recess arranged in the region of the dome, for example by friction welding, MIG welding or laser welding.
  • the closure element is soldered to the dome.
  • the welding offers the great advantage that this could be done simultaneously with the welding, for example.
  • a first piston part with a second piston part.
  • Piston according to the invention can thus be formed not only in one piece or in one piece, but also in several parts, for example, with a first piston part forming the piston crown and a second piston part forming at least one region of the piston skirt.
  • the piston can be forged or assembled from forged piston parts. Also another
  • the choice of material for the piston according to the invention is not limited, so that this example. Can be made of steel or aluminum.
  • the cooling channel and the at least two channel elements form a closed one
  • Cooling system with sodium and / or potassium as cooling medium For example, sodium has a melting point of just below 100 ° C. and thus becomes liquid during operation of the internal combustion engine, as a result of which the sodium absorbed in the channel elements sloshes back and forth and thus by means of the so-called
  • Shaker effect can cause the cooling of the piston.
  • Potassium melts already at approx. 63 ° C, so that by enriching the cooling medium with potassium, its melting point can be lowered compared to pure sodium.
  • sodium / potassium and lithium instead of sodium / potassium and lithium or
  • Lithium nitride can be used as a cooling medium.
  • cooling channel and the at least two channel elements an open cooling system with cooling oil as
  • cooling oil is sprayed into an inlet of the cooling channel, circulates in it, and is additionally shaken to and fro in the channel elements by means of the shaker effect. Subsequently, the now heated cooling oil leaves the cooling channel via an outlet.
  • the at least two channel elements run along one
  • combustion chamber trough (which can be achieved by an extension of the channel elements into the piston skirt a further improved cooling).
  • the cooling channel would be extended locally downwards (into the piston skirt), so that the heat in this
  • FIGURE 1 shows a sectional view through a piston according to the invention.
  • an inventive piston 1 of an only indicated internal combustion engine 2 a piston shaft 3 and a, a circumferential ring section 4 having piston head 5, in which,
  • cooling channel 6 is provided for receiving a cooling medium.
  • the piston head 5 has a
  • Burner trough 7 with a central Dom 8 may be arranged in a purely theoretical way decentralized.
  • at least two channel elements 9 are now provided, which are fluidically connected to the cooling channel 7 and in which the same cooling medium is received for cooling the piston 1.
  • the at least two channel elements 9 go there
  • a closure element 10 According to the invention from the dome 8 and are closed in the region of the dome 8 by a closure element 10. If you look at the dome 8 in more detail, it can be seen according to FIG. 1 that there is a recess 1 1 is provided, in which the at least two channel elements 9 open or from the at least two channel elements 9 go out. If one looks at the closure element 10 according to FIG. 1, it can be seen that this allows a fluidic connection between the individual channel elements 9 in the region of the recess 11 even in the mounted state, so that in theory also an exchange of the cooling medium between the individual channel elements 9 during operation of the internal combustion engine 2 is possible. Alternatively, of course, it is also conceivable that the closure element 10 is formed such that it completely fills the recess 11 and thereby fluidly separates and closes the individual channel elements 9 in the area of the dome 8 in the assembled state.
  • the cooling channel 6 and the at least two channel elements 9 form a closed cooling system with sodium and / or potassium as the cooling medium.
  • Sodium for example, has a melting point of just below 100 ° C. and thus becomes liquid during operation of the internal combustion engine 2, as a result of which in the channel elements 9
  • the piston 1 itself can be made of steel or aluminum and be made in one piece or in several parts. In a multipart
  • the piston 1 can be forged or made
  • cooling channel 6 and the at least two channel elements 9 an open cooling system with cooling oil as
  • cooling medium Form cooling medium.
  • cooling oil is injected into an inlet, not shown in FIG. 1, of the cooling channel 6, circulates in it and is additionally shaken to and fro in the channel elements 9 by means of the shaker effect. Subsequently, the now heated cooling oil leaves the cooling channel 6 via a likewise not shown output.
  • the cooling channel 6 is deeper in the peripheral region between the hubs 18, wherein in these areas the channel elements 9 open into the cooling channel 6. In the area of the hubs 18, the cooling channel 6 is not so deep. This means that the cooling channel 6 in the hub connection to the piston shaft 3, that is, away from the hubs 18, further in the axial direction extends as in the remaining area, that is, as in the circumferentially intermediate area.
  • the at least two channel elements 9 run along one
  • the piston 1 is produced, for example, as follows: First, the piston 1 is produced, either as a one-piece component or by two separate piston parts 15, 16.
  • the channel elements 9 can either be drilled subsequently from the recess 11 or already together with the piston 1, that is to say in particular produced together with the second piston part 16, in particular provided that a channel core 9 free-retaining casting core is provided for this purpose.
  • the channel elements 9 in a closed cooling system with the cooling medium, eg. Sodium and / or potassium, filled and then the closure member 10 is placed and in particular the edge tightly with the recess 1 connected, for example, soldered or welded.
  • the soldering or welding can simultaneously with, for example, the welding of the other
  • Burner trough bottom 17 made by turning, so that the
  • Closing element 10 starting from the shape shown in FIG. 1 with broken line drawn occupies the drawn according to FIG. 1 with a solid line shape.
  • the piston 1 according to the invention it is possible for the first time to provide a cooling additionally supporting channel elements 9 centrally from the dome 8 and closed by a single, common closure element 10, whereby the closing of the channel elements 9 clearly compared to known from the prior art channel elements can be simplified.
  • no separate machining of a piston skirt surface must be carried out in order to be able to reliably introduce the channel elements previously forming bores.

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

La présente invention concerne un piston (1) d'un moteur à combustion interne (2), comprenant une jupe de piston (3) et une tête de piston (5) dans laquelle est ménagé un canal de refroidissement (6) destiné à recevoir un fluide de refroidissement, la tête de piston (5) présentant un bol de combustion (7) pourvu d'un dôme (8). L'invention est caractérisée par la présence d'au moins deux éléments de canal (9) partant du dôme (8) et fermés au niveau du dôme (8) par un élément de fermeture (10) commun, ces éléments de canal (9) étant reliés fluidiquement au canal de refroidissement (6).
PCT/EP2017/051549 2016-02-03 2017-01-25 Piston d'un moteur à combustion interne Ceased WO2017133949A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016201621.0 2016-02-03
DE102016201621.0A DE102016201621A1 (de) 2016-02-03 2016-02-03 Kolben einer Brennkraftmaschine

Publications (1)

Publication Number Publication Date
WO2017133949A1 true WO2017133949A1 (fr) 2017-08-10

Family

ID=57890828

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/051549 Ceased WO2017133949A1 (fr) 2016-02-03 2017-01-25 Piston d'un moteur à combustion interne

Country Status (2)

Country Link
DE (1) DE102016201621A1 (fr)
WO (1) WO2017133949A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020209803A1 (de) 2020-08-04 2022-02-10 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor und Herstellungsverfahren eines solchen
DE102021205709A1 (de) 2021-06-07 2022-12-08 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor mit verbesserter Kühlung des Kolbenbodens

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR839580A (fr) * 1938-06-21 1939-04-06 Sulzer Ag Piston refroidi pour moteurs à combustion interne
DE1049174B (de) * 1956-10-25 1959-01-22 Mahle Kg OElgekuehlter Kolben, insbesondere fuer Brennkraftmaschinen
DE1097210B (de) * 1956-12-03 1961-01-12 Fonderie Tech De Vitry Sur Sei Kolben fuer Brennkraftmaschinen
DE2351166A1 (de) * 1972-10-12 1974-04-25 Metallgusskombinat Leipzig Veb Mehrteilige kolben fuer verbrennungsmotoren, insbesondere fuer viertakt-dieselmotoren
JPS49128955U (fr) * 1973-03-05 1974-11-06
SU1208286A1 (ru) * 1984-05-21 1986-01-30 Предприятие П/Я М-5939 Поршень дл двигател внутреннего сгорани
EP2505816A1 (fr) * 2009-11-25 2012-10-03 Toyota Jidosha Kabushiki Kaisha Piston pour moteur à combustion interne et moteur à combustion interne
DE102013002895A1 (de) 2013-02-20 2014-08-21 Daimler Ag Kolben für eine Hubkolben-Verbrennungskraftmaschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB204524A (en) * 1922-09-28 1923-10-04 Christopher Wortley Kerridge An improved design of piston for internal combustion engines
DE3444661A1 (de) * 1984-12-07 1986-06-12 Klöckner-Humboldt-Deutz AG, 5000 Köln Fluessigkeitsgekuehlter kolben
DE102004030218A1 (de) * 2004-06-22 2006-01-19 Mahle Gmbh Gebauter Kolben für einen Verbrennungsmotor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR839580A (fr) * 1938-06-21 1939-04-06 Sulzer Ag Piston refroidi pour moteurs à combustion interne
DE1049174B (de) * 1956-10-25 1959-01-22 Mahle Kg OElgekuehlter Kolben, insbesondere fuer Brennkraftmaschinen
DE1097210B (de) * 1956-12-03 1961-01-12 Fonderie Tech De Vitry Sur Sei Kolben fuer Brennkraftmaschinen
DE2351166A1 (de) * 1972-10-12 1974-04-25 Metallgusskombinat Leipzig Veb Mehrteilige kolben fuer verbrennungsmotoren, insbesondere fuer viertakt-dieselmotoren
JPS49128955U (fr) * 1973-03-05 1974-11-06
SU1208286A1 (ru) * 1984-05-21 1986-01-30 Предприятие П/Я М-5939 Поршень дл двигател внутреннего сгорани
EP2505816A1 (fr) * 2009-11-25 2012-10-03 Toyota Jidosha Kabushiki Kaisha Piston pour moteur à combustion interne et moteur à combustion interne
DE102013002895A1 (de) 2013-02-20 2014-08-21 Daimler Ag Kolben für eine Hubkolben-Verbrennungskraftmaschine

Also Published As

Publication number Publication date
DE102016201621A1 (de) 2017-08-03

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