EP2342441B1 - Piston avec canal de refroidissement pour un moteur à combustion interne, avec un élément de fermeture qui ferme le canal de refroidissement - Google Patents

Piston avec canal de refroidissement pour un moteur à combustion interne, avec un élément de fermeture qui ferme le canal de refroidissement Download PDF

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Publication number
EP2342441B1
EP2342441B1 EP09778534.9A EP09778534A EP2342441B1 EP 2342441 B1 EP2342441 B1 EP 2342441B1 EP 09778534 A EP09778534 A EP 09778534A EP 2342441 B1 EP2342441 B1 EP 2342441B1
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EP
European Patent Office
Prior art keywords
cooling channel
piston
closure element
closing element
ring field
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.)
Active
Application number
EP09778534.9A
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German (de)
English (en)
Other versions
EP2342441A1 (fr
Inventor
Franz-Peter Allig
Wolfgang Köhler
Matthias Laqua
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.)
KS Kolbenschmidt GmbH
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KS Kolbenschmidt 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.)
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Publication date
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Publication of EP2342441A1 publication Critical patent/EP2342441A1/fr
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Publication of EP2342441B1 publication Critical patent/EP2342441B1/fr
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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 
    • F02F3/16—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
    • 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
    • F02F2200/00—Manufacturing
    • F02F2200/04—Forging of engine parts
    • 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 cooling channel piston having a lying behind a ring field radially encircling cooling channel, the cooling channel piston forged from a steel material and the cooling channel is introduced by machining between an upper part below the ring field and a lower part above the piston hubs and Kolben2020ften, wherein the Cooling channel extends behind the ring field in the direction of an upper side of the upper part, according to the features of the preamble of claim 1.
  • a genericdekanalkolben and a method for its preparation is known from DE 100 13 395 C1 known.
  • a piston blank is forged from a steel material, wherein the forging method has the advantage that a material structure is produced with particularly high strength properties. This is necessary to meet the strength requirements when using cooling channel pistons in modern internal combustion engines. These strength requirements result in particular from the ever-increasing combustion pressures and combustion temperatures as well as injection pressures of the fuel in the cylinder chamber of the internal combustion engine.
  • the invention is therefore based on the object to provide a cooling channel piston, which is improved compared to the cooling channel piston from the prior art, which meets in particular the required strength requirements during its operation in the cylinder chamber of the internal combustion engine.
  • the cooling channel piston above its piston bosses and piston shafts has an outwardly facing support region, wherein between the lower edge of the ring field and the support region (viewed in the direction of Kolbenhubachse) a closure element is arranged and secured, which the cooling channel after his Production closes.
  • a closure element is arranged and secured, which the cooling channel after his Production closes.
  • closure element is parallel to the Kolbenhubachse (and not transversely, as in the DE 100 13 395 C1 ).
  • DE102005037175 disclose cooling channel piston, in which the cooling channels are covered by a closure element.
  • the closure element consists of a heat-resistant plastic, in particular silicone-based.
  • the closure element either on plastic or steel material base can be formed one or more parts. This leads to a particularly high rigidity and easy installation.
  • a closure element made of a heat-resistant plastic also has the advantage that not only a single closure is possible due to the stability of the plastic, but after a certain period of operation of the piston and its removal from the engine, the plastic closure ring can be removed to the cooling channel to inspect. Thereafter, the cooling channel can be re-closed by a new closure element or even with the previously used closure element, the latter possibility advantageously brings a cost reduction.
  • the closure element is releasably or permanently connected to the lower edge of the ring field and / or to the support region.
  • This detachable connection has the advantage that the closure element can be removed and the cooling channel can be closed again with the same or another closure element.
  • the unsolvable connection has the additional advantage that the rigidity is improved, since the claimed piston crown can be supported on the piston stems during operation.
  • the non-detachable connection can be made selectively, in some areas radially encircling or full circumference.
  • the permanent connection can in a closure element made of a metal material z. B. by soldering or welding, wherein a closure element can be glued from a plastic. Bonding is an advantageous alternative even with a closure element made of a metal material for soldering or welding.
  • the closure element is releasably connected by a clamping with the lower edge of the ring field and the support region, wherein in a particularly advantageous manner, the closure element has at least one shoulder at its upper and / or lower edge, wherein the support region also has a Has at least one paragraph of the closure element corresponding paragraph.
  • the respective paragraph can also be executed in several stages, so that the closure element z. B. is releasably secured by means of a tongue and groove connection to the lower edge of the ring field and / or the support region.
  • the closure element has at least one opening, in a particularly advantageous manner distributed in the radial circumference, a plurality of openings.
  • the opening or the openings is selected so that a certain proportion of the circulating engine oil exits the cooling channel, which serves as lubrication for the piston skirt on the cylinder inner wall of the internal combustion engine.
  • the at least one opening or the plurality of openings is provided in a region in the closure element above the piston shafts of the cooling channel piston.
  • at least one transverse connection is provided between the cooling channel and a piston inner region of the cooling channel piston.
  • FIGS. 1 to 3 is denoted by 1 a cooling channel piston, which is integrally formed of a steel material and having a top part 2 with a ring field 3. At the top of the upper part 2, a combustion bowl 4 is present, but does not have to be present.
  • 5 is a piston inner region, wherein a cooling channel extends radially circumferentially behind the ring field 3 and the piston inner region 5.
  • the cooling channel piston 1 has a lower part 7 which comprises piston bosses 8 with bolt holes 9 and piston shanks 10.
  • the piston shafts 10 are present radially circumferentially only in partial areas, while the piston bosses 8 are set back relative to the outer diameter of the cooling channel piston 1.
  • the invention is not limited to types of piston, in which the piston shanks 10 are radially encircling cylindrical and form the outer region of the lower part 7.
  • At least one inlet opening 11 in the direction of the cooling channel 6, as well as a drain opening 12, for the engine oil, which is to be injected into the cooling channel 6, is present in the region of the piston hubs 8.
  • at least one transverse connection 13, preferably two transverse connections (once drain and once inlet for the engine oil) may also be present between the piston inner region 5 and the cooling channel 6.
  • the preferably in its cross-section rectangular and elongated closure element 14 is aligned parallel to the Kolbenhubachse and arranged and secured between the lower edge of the ring field 3 and the upper edge of the Abstützungs Kunststoffes.
  • the closure element 14 is at least made in two parts, so that it can be arranged and fixed in the area between the ring field 3 and Abstweilungs Scheme AB.
  • the closure element 14 insoluble with the support area AB and / or the lower edge of the ring field 3 z. B. by soldering, welding or gluing or the like, shows in a further alternative, the embodiment that the closure member 14 is arranged and fixed by a clamping fit on the cooling channel piston 1.
  • multi-level paragraphs or tongue and groove connections between Closure element 14 and lower edge Rindfeld 3 on the one hand and the upper edge Abstützungs Symposium AB on the other hand are conceivable.
  • FIGS. 4 and 5 Further structural details or the implementation of the method for introducing the cooling channel 6 in the upper part 2 of the cooling channel piston 1.
  • the closure member 14 is arranged and fastened, introduced a radially circumferential recess which extends between the support region AB and the peripheral lower edge of the ring field 3.
  • a tool W is used, which with a bow or crescent-shaped bit M Is provided.
  • This bit M of the tool W is inserted into the groove and moved due to a radial movement either of the tool W at a fixed cooling channel piston 1 or stationary tool W and relative movement to the cooling channel piston 1.
  • the cooling channel 1 can be introduced stepwise, wherein the cross section of the introduced cooling channel 6, which in FIG. 4 has shown cross-sectional shape which is approximately a kidney shape.
  • the advantage of the illustrated cross section of the cooling channel 1, which is approximately kidney-shaped, is a better stress distribution in the upper part 2 of the cooling channel piston 1 while reducing the weight of the entire cooling channel piston 1. The better stress distribution results due to the larger radii of the cross section of the cooling channel. 6 which results from the bow-shaped or sickle-shaped bit M.
  • FIG. 5 different views of the finished cooling channel piston 1 are shown, wherein it can be seen that the finished introduced cooling channel 6 is closed in the upper part 2 with the closure element 14.
  • This closure element 14 relies, as in the embodiments according to the FIGS. 1 to 3 , between the support area AB above the piston shank 10 and the radially encircling lower edge of the ring field 2 from.
  • a plurality of cross connections 13 are provided in a star shape between the piston inner region 5 and the cooling channel 6.

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)

Claims (7)

  1. Piston à canal de refroidissement (1), lequel comprend un canal de refroidissement (6) radialement périphérique situé derrière une zone de segments (3), le piston à canal de refroidissement (1) étant forgé à partir d'un matériau à base d'acier et le canal de refroidissement (6) étant ménagé, au moyen d'un usinage par enlèvement de copeaux, entre une partie supérieure (2) en dessous de la zone de segments (3) et une partie inférieure (7) au-dessus de bossages de piston (9) et de jupes de piston (10), le canal de refroidissement (6) s'étendant derrière la zone de segments (3) en direction d'un côté supérieur de la partie supérieure (2), le piston à canal de refroidissement (1) comprenant, au-dessus de ses bossages de piston (9) et de ses jupes de piston (10), une région d'appui (AB) tournée vers l'extérieur, caractérisé en ce qu'un élément de fermeture (14) orienté parallèlement à l'axe de course de piston est disposé et fixé entre le bord inférieur de la zone de segments (3) et la région d'appui (AB), lequel élément de fermeture ferme le canal de refroidissement (6) après sa fabrication.
  2. Piston à canal de refroidissement (1) selon la revendication 1, caractérisé en ce que l'élément de fermeture (14) est constitué d'une matière synthétique résistant à la chaleur.
  3. Piston à canal de refroidissement (1) selon la revendication 1 ou 2, caractérisé en ce que l'élément de fermeture (14) est réalisé en une ou plusieurs parties.
  4. Piston à canal de refroidissement (1) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'élément de fermeture (14) comprend, sur son bord supérieur et/ou inférieur, au moins un épaulement, la région d'appui (AB) comprenant également un épaulement correspondant à l'au moins un épaulement de l'élément de fermeture (14).
  5. Piston à canal de refroidissement (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de fermeture (14) est relié de manière amovible ou non amovible au bord inférieur de la zone de segments (3) et/ou à la région d'appui (AB).
  6. Piston à canal de refroidissement (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de fermeture (14) comprend au moins une ouverture, de préférence plusieurs ouvertures.
  7. Piston à canal de refroidissement (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins une liaison transversale (13) est prévue entre le canal de refroidissement (6) et une région interne de piston (5) du piston à canal de refroidissement (1).
EP09778534.9A 2008-11-04 2009-09-15 Piston avec canal de refroidissement pour un moteur à combustion interne, avec un élément de fermeture qui ferme le canal de refroidissement Active EP2342441B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008055848A DE102008055848A1 (de) 2008-11-04 2008-11-04 Kühlkanalkolben einer Brennkraftmaschine mit einem Verschlusselement, das den Kühlkanal verschließt
PCT/EP2009/006671 WO2010051878A1 (fr) 2008-11-04 2009-09-15 Piston avec canal de refroidissement pour un moteur à combustion interne, avec un élément de fermeture qui ferme le canal de refroidissement

Publications (2)

Publication Number Publication Date
EP2342441A1 EP2342441A1 (fr) 2011-07-13
EP2342441B1 true EP2342441B1 (fr) 2018-11-14

Family

ID=41260064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09778534.9A Active EP2342441B1 (fr) 2008-11-04 2009-09-15 Piston avec canal de refroidissement pour un moteur à combustion interne, avec un élément de fermeture qui ferme le canal de refroidissement

Country Status (6)

Country Link
US (1) US8925511B2 (fr)
EP (1) EP2342441B1 (fr)
JP (1) JP2012507651A (fr)
KR (1) KR20110094273A (fr)
DE (1) DE102008055848A1 (fr)
WO (1) WO2010051878A1 (fr)

Families Citing this family (10)

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Publication number Priority date Publication date Assignee Title
DE102011103105A1 (de) * 2011-05-25 2012-11-29 Mahle International Gmbh Kolben für einen Verbrennungsmotor und Verfahren zur Herstellung des Kolbens
DE102012014194A1 (de) * 2012-07-18 2014-01-23 Mahle International Gmbh Verfahren zur Herstellung eines Kolbens
US20180230937A1 (en) 2015-08-11 2018-08-16 Ks Kolbenschmidt Gmbh Method for Producing a Monoblock Piston, and Monoblock Piston
DE102015220256A1 (de) * 2015-10-19 2017-04-20 Mahle International Gmbh Verfahren zur Herstellung eines Kolbens
GB201519640D0 (en) * 2015-11-06 2015-12-23 Gm Global Tech Operations Inc Piston cooling jet for an internal combustion engine
US10294887B2 (en) 2015-11-18 2019-05-21 Tenneco Inc. Piston providing for reduced heat loss using cooling media
WO2017203779A1 (fr) * 2016-05-27 2017-11-30 本田技研工業株式会社 Piston et son procédé de fabrication
US10316790B2 (en) * 2016-09-27 2019-06-11 TennecoInc. Piston ring-belt structural reinforcement via additive machining
DE102018128512A1 (de) 2017-11-14 2019-05-16 Ks Kolbenschmidt Gmbh Stahlkolben mit optimiertem Design
DE102020210907A1 (de) 2020-08-28 2022-03-03 Mahle International Gmbh Kolben für eine Brennkraftmaschine

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Also Published As

Publication number Publication date
KR20110094273A (ko) 2011-08-23
EP2342441A1 (fr) 2011-07-13
US8925511B2 (en) 2015-01-06
US20110265744A1 (en) 2011-11-03
DE102008055848A1 (de) 2010-05-06
WO2010051878A1 (fr) 2010-05-14
JP2012507651A (ja) 2012-03-29

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