EP1799987B1 - Piston pour moteur a combustion interne, et moteur a combustion interne - Google Patents

Piston pour moteur a combustion interne, et moteur a combustion interne Download PDF

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Publication number
EP1799987B1
EP1799987B1 EP05784034A EP05784034A EP1799987B1 EP 1799987 B1 EP1799987 B1 EP 1799987B1 EP 05784034 A EP05784034 A EP 05784034A EP 05784034 A EP05784034 A EP 05784034A EP 1799987 B1 EP1799987 B1 EP 1799987B1
Authority
EP
European Patent Office
Prior art keywords
piston
coolant
combustion engine
cooling
opening
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.)
Not-in-force
Application number
EP05784034A
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German (de)
English (en)
Other versions
EP1799987A1 (fr
Inventor
Roland Linz
Kurt Voit
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.)
Federal Mogul Nuernberg GmbH
Original Assignee
Federal Mogul Nuernberg 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 Federal Mogul Nuernberg GmbH filed Critical Federal Mogul Nuernberg GmbH
Priority to PL05784034T priority Critical patent/PL1799987T3/pl
Publication of EP1799987A1 publication Critical patent/EP1799987A1/fr
Application granted granted Critical
Publication of EP1799987B1 publication Critical patent/EP1799987B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the invention relates to a piston for an internal combustion engine and an internal combustion engine with a novel piston.
  • the pistons of internal combustion engines are exposed to high thermal loads during operation.
  • the pistons can be cooled by suitable measures. This is done essentially by the fact that the respective piston from the side of the crankcase forth with a cooling medium, usually oil, is applied.
  • a cooling medium is at least over a certain period in contact with the piston material, so that it can absorb heat from this.
  • the US 5,595,145 relates to a piston for an internal combustion engine, which has a largely circulating cooling chamber with an inlet opening and two drainage openings, which are interconnected by the cooling space.
  • a piston is known in which a ring carrier is provided with a cooling channel plate, which may have a plurality of flats.
  • the flats can be drilled to form inflows and outflows. Since the formed cooling channel is circumferential, in the case that two drainage holes are provided, they are connected to each other.
  • the invention has for its object to provide a piston for an internal combustion engine and an internal combustion engine, which is improved in terms of the ability to provide reliable cooling.
  • the piston has a cooling channel with a single inflow opening and at least two outflow openings. At least two of the discharge openings are separated with respect to the outflowing coolant. This is to be understood that there is no flow connection between them in the region of the discharge openings.
  • the cooling medium which flows from the inflow opening via a corresponding channel section to a discharge opening which is fluidly separated from other outflow openings, can exit from this outflow opening unhindered. It does not occur that cooling medium flows out of different channel sections through one and the same outlet opening. Rather, each channel section or "sub-channel” at least one "own”, so only this channel section associated drain opening.
  • a connection in the form of a preferably small passage can be provided in the region of the outflow openings.
  • the coolant is not intended that flows through this passage coolant from the one cooling passage portion in the other cooling passage portion or to its drain port.
  • the coolant is directed out of the respective cooling channel section to the respective outflow opening associated with this cooling channel section.
  • the inflow opening can also be referred to as an inflow, an inflow, an inlet, inlet, inlet or inlet opening.
  • the drain hole also be called just a drain or an outlet.
  • the measure according to the invention provides the following advantages.
  • the cooling effect depends inter alia on the residence time of the cooling medium in the cooling channel.
  • the desired cooling effect can be matched to the cooling medium leaving the cooling channel after a certain residence time. According to the invention, this can be ensured particularly well by allowing the coolant jet to escape unhindered at the outflow opening.
  • an undisturbed discharge of the coolant flow can take place in the piston according to the invention. This improves the cooling effect.
  • the cooling of a piston can be improved by the piston according to the invention, in which the cooling channel consists of two sections of unequal length.
  • the cooling channel consists of two sections of unequal length.
  • the inlet opening can be arranged off-center.
  • a central arrangement of the outlet openings to the effect that they are located above the piston pin, in particular between the pin bosses and the small connecting rod eye can be maintained.
  • Such an arrangement is advantageous for the best possible lubrication of the articulated connection between the piston pin and the pin bosses or the connecting rod eye.
  • the two outlet openings can be arranged in particular and advantageously to the left and right of the connecting rod, to provide here for an advantageous lubrication.
  • This advantage can be realized in particular in the case of a coolant jet which runs largely parallel to the piston axis.
  • a substantially circumferential cooling channel has at least one inflow opening and at least two outflow openings which are separated from one another with regard to the outflowing coolant.
  • the cooling channel of the piston according to the invention is largely encircling. Although it is conceivable that only individual regions of the piston are cooled by the cooling channel designed according to the invention, it is preferable to provide two largely semicircular cooling channel sections. This means that the two outflow openings are arranged adjacent to one another but are separated from one another. As at this In some embodiments, no continuation of the orbiting design results, a cooling channel designed in this way will be described as substantially circumferential.
  • At least one flow dividing element in the region of the inflow opening.
  • This may be, for example, a rib or a bead, onto which flows the coolant stream supplied, for example, via a nozzle.
  • the flow dividing element divides the coolant flow into the respective channel sections. Since, as mentioned, at least two channel sections each have their "own" discharge opening, an unhindered flow of the coolant can be ensured, and the subsequent flow of coolant is not hindered.
  • the flow dividing element is preferably optimized by flow geometry such that the coolant flow can be divided into the at least two directions largely without turbulence losses.
  • the flow dividing element is formed at the inflow such that at best causes gentle changes in direction, and abrupt changes in direction are avoided. As a result, flow losses and turbulence can be largely excluded.
  • the measure according to the invention makes it possible for the cooling channel to have sections of unequal length. It has also been stated that this is advantageous with regard to the use of the supplied coolant jet. This can be achieved in particular by the preferred measure that the inflow opening is provided asymmetrically with respect to drainage openings. This is therefore preferred to allow a coolant jet which is substantially parallel to the piston axis and can be supplied at the entrance with particularly low losses.
  • the piston according to the invention can be improved in addition to the improvement of the cooling with respect to the lubrication of the connection between the piston pin and the piston pin eyes or connecting rod eye.
  • This can be achieved in that at least one outflow opening is directed in the direction of a piston pin eye.
  • a preferably gentle deflection takes place in one direction away from the piston crown, or in the case of an ordinary orientation of the piston "downwards". Therefore, in this preferred embodiment, the exiting coolant jet is directed towards the piston pin and can provide beneficial lubrication.
  • the desired deflection at the Drain opening so gently and without abrupt changes in direction done that the outlet of the coolant flow is largely unhindered and turbulence.
  • the piston according to the invention is further combined with a piston pin and a connecting rod.
  • a piston pin and a connecting rod With such a combination, particularly favorable lubrication conditions could be ascertained on the piston pin if at least one outflow opening is located in a region between a piston pin boss and the connecting rod eye, but typically at an edge of the piston.
  • both the connection between the piston pin and the piston pin boss and the connection to the connecting rod eye can be efficiently lubricated by the exiting coolant flow.
  • the piston according to the invention presents itself as being capable of being used independently. However, it develops its advantages in particular in the state in which it is installed in an internal combustion engine. In this respect, an internal combustion engine with at least one such piston is considered as the subject of the application.
  • a coolant jet for the internal combustion engine designed in this way according to the invention, it is preferred for the efficient use of a coolant jet that it be a device for generating a coolant jet which is substantially parallel to the piston axis.
  • a coolant jet which can be used advantageously in a piston according to the invention with an asymmetrically provided inflow opening, significantly lower losses result at the inflow opening than is the case for the arrangements with tilted coolant jet known in the prior art.
  • the coolant jet is substantially parallel to the piston axis, this is not absolutely necessary. Rather, the coolant jet can also run in any manner obliquely or inclined to the piston axis.
  • Fig. 1 shows schematically the cooling channel 10 of the piston according to the invention.
  • This has essentially two semicircular cooling duct sections 12.1 and 12.2.
  • the coolant flows into the cooling channel 10 through a single inlet opening 14, at which the coolant flow is divided by a flow dividing element 16, preferably in the form of a rib or a bead, into the two partial flows in the cooling channel sections 12.1 and 12.2.
  • the flow dividing element 16 is optimized in terms of flow such that no abrupt but gentle changes in direction take place, and the flow losses and turbulences remain low.
  • the coolant flow leaves the respective cooling channel section 12.1 or 12.2 by their own separate, only the respective cooling channel section associated drain opening 18.1 and 18.2.
  • the walls required for the deflection are also designed to be so harmonious and optimized in terms of flow geometry that no abrupt changes in direction and turbulence occur. Rather, the coolant flow can escape from the respective outflow opening 18 largely unhindered. In particular, the two coolant streams do not interfere with each other due to the fluidic separation at the outlet.
  • Fig. 1 It is understood that the representation is highly schematic, and usually neither the inflow nor the outflow "to the side" to or from the cooling channel 10 takes place. Rather, the cooling channel 10 is formed in a plane substantially perpendicular to the piston axis. The inflow and / or outflow is largely parallel to the Piston axis, ie from the bottom of the piston ago. This is in the schematic representation of Fig. 1 not recognizable, but goes out Fig. 2 out.
  • Fig. 2 shows a piston 20 according to the invention from the underside, so that the one inflow opening 14 and the two discharge openings 18 can be seen.
  • the flow dividing element 16 Approximately in the region of the center of the inflow opening 14 is the flow dividing element 16, which is in the form of a rib or bead. By flowing against the flow divider element 16 with the coolant jet, this is partially in the one 12.1 and the other cooling duct section 12.2 (see. Fig. 1 ).
  • These sections 12 each extend approximately semicircular starting from the inflow opening 14 in the area above the in Fig. 2 to be recognized pin bosses 22.
  • the cooling channel sections 12 each have their own drain opening 18.
  • a deflection takes place "downwards", that is to say according to the illustration of FIG Fig. 2 in the direction of the viewer.
  • the deflected in the direction of the piston pin coolant can be used advantageously for lubricating the connections between the piston pin and the piston pin bosses and the connecting rod.
  • the "area between the piston pin eyes” is understood to mean the approximately strip-shaped area between the inflow opening 14 and the outflow opening 18.2. In this area, in particular on an edge of the piston, in the embodiment shown, at least the drain opening 18. 2 is located, so that the coolant jet issuing therefrom at least partially reaches the piston pin (not shown) inserted in the piston pin bosses 22.
  • the inflow opening 14 is provided asymmetrically with respect to the outflow openings 18, and consequently that the cooling channel section is in the same direction as in FIG Fig. 1 left drain opening 18.1 is shorter than the other cooling passage section.
  • the inflow opening 14 may also be arranged centrally between the piston pin bosses 22. Likewise, she may, unlike in Fig. 2 shown further provided offset in the direction of the piston pin bosses 22.
  • Fig. 3 shows in a radial section of the piston 10, the two cooling duct sections 12.1 and 12.2. In the region of the common inflow opening 14, the flow dividing element 16 can be seen.
  • Out Fig. 3 also shows that the cross section of the cooling channel sections 12.1, 12.2 is at least substantially constant over the extent of the respective section, so that the favorable and largely unhindered flow of the coolant is supported.
  • the cross section remains constant, in particular starting from the point at which the flow dividing element 16 is inclined relative to the respective cooling channel section 12.1 or 12.2.
  • the inflow opening 14 is off-center. This results from the fact that in the representation of Fig. 3 the piston is twisted slightly to the right, so that the inner surface of the left piston pin eye 22 can be seen.
  • Fig. 4 In contrast, goes from the sectional view of Fig. 4 indicates that it is a view perpendicular to a (imaginary) piston pin axis.
  • Fig. 4 It can be seen that in this view, the two drain holes 18.1 and 18.2 are symmetrical to each other, while from the comparison with the Fig. 3 shows that the inflow opening is provided asymmetrically.
  • Fig. 4 It can also be seen that the two outlet openings 18.1 and 18.2 are indeed connected to each other by a small passage 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (9)

  1. Piston (20) pour un moteur à combustion interne, ledit piston (20) présentant un canal de refroidissement (10) faisant notablement le pourtour, avec une unique ouverture d'alimentation (14) et au moins deux ouvertures d'évacuation (18), dont au moins deux (18.1), 18.2) sont complètement séparées l'une de l'autre, eu égard au fluide de refroidissement sortant.
  2. Piston selon la revendication 1, caractérisé en ce qu'au moins un élément de division d'écoulement (16) est prévu dans la zone de l'ouverture d'alimentation (14).
  3. Piston selon la revendication 1 ou 2, caractérisé en ce qu'une section transversale au moins notablement constante est prévue dans la zone au moins d'un tronçon de canal de refroidissement (12.1, 12.2), entre l'ouverture d'alimentation (14) et l'ouverture d'évacuation (18) respective.
  4. Piston selon l'une des revendications précédentes, caractérisé en ce que l'ouverture d'alimentation (14) est prévue asymétriquement par rapport aux ouvertures d'évacuation (18).
  5. Piston selon l'une des revendications précédentes, caractérisé en ce qu'au moins une ouverture d'évacuation (18) est orientée en direction d'un boulon d'axe de piston.
  6. Piston selon l'une des revendications précédentes, caractérisé en ce qu'au moins une ouverture d'évacuation (18) est disposée dans une zone située entre des bossages pour axe de piston (22).
  7. Piston selon l'une des revendications précédentes, caractérisé en ce que celui-ci est combiné à un axe de piston et à une bielle, et au moins une ouverture d'évacuation (18) est prévue dans une zone située entre un bossage pour axe de piston (22) et une tête de bielle.
  8. Moteur à combustion interne, avec au moins un piston selon l'une des revendications précédentes.
  9. Moteur à combustion interne selon la revendication 8, caractérisé en ce que celui-ci présente un dispositif pour produire un jet de fluide de refroidissement, s'étendant notablement parallèlement à l'axe de piston.
EP05784034A 2004-09-09 2005-09-01 Piston pour moteur a combustion interne, et moteur a combustion interne Not-in-force EP1799987B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05784034T PL1799987T3 (pl) 2004-09-09 2005-09-01 Tłok do silnika spalinowego oraz silnik spalinowy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004043720A DE102004043720A1 (de) 2004-09-09 2004-09-09 Kolben für einen Verbrennungsmotor sowie Verbrennungsmotor
PCT/EP2005/009420 WO2006027157A1 (fr) 2004-09-09 2005-09-01 Piston pour moteur a combustion interne, et moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1799987A1 EP1799987A1 (fr) 2007-06-27
EP1799987B1 true EP1799987B1 (fr) 2010-04-21

Family

ID=35149068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05784034A Not-in-force EP1799987B1 (fr) 2004-09-09 2005-09-01 Piston pour moteur a combustion interne, et moteur a combustion interne

Country Status (7)

Country Link
US (1) US7748361B2 (fr)
EP (1) EP1799987B1 (fr)
AT (1) ATE465338T1 (fr)
DE (2) DE102004043720A1 (fr)
ES (1) ES2341266T3 (fr)
PL (1) PL1799987T3 (fr)
WO (1) WO2006027157A1 (fr)

Families Citing this family (18)

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DE102006056011A1 (de) 2006-11-28 2008-05-29 Ks Kolbenschmidt Gmbh Kühlkanalvarianten für Kolben
DE102006056012A1 (de) * 2006-11-28 2008-05-29 Ks Kolbenschmidt Gmbh Variabel gestalteter Kühlkanal für einen Kolben
DE102008002571A1 (de) * 2008-06-20 2009-12-31 Federal-Mogul Nürnberg GmbH Kolben für einen Verbrennungsmotor
DE102008038324A1 (de) * 2008-08-19 2010-02-25 Mahle International Gmbh Kühlkanal eines Kolbens für einen Verbrennungsmotor
KR101417117B1 (ko) 2008-10-22 2014-08-07 두산인프라코어 주식회사 피스톤 냉각 장치
WO2011097205A2 (fr) * 2010-02-03 2011-08-11 Federal-Mogul Corporation Piston pourvu d'un élément de refroidissement de canalisation de refroidissement centrale
US8511261B2 (en) * 2010-02-23 2013-08-20 Honda Motor Co., Ltd. Piston cooling device
US8347843B1 (en) 2011-03-25 2013-01-08 Batiz-Vergara Jose A Piston for internal combustion engine
DE102011076455A1 (de) 2011-05-25 2012-11-29 Mahle International Gmbh Gießkern zur Bildung eines Kühlkanals in einem Kolben
DE102015009568B4 (de) * 2015-07-23 2021-02-11 Audi Ag Brennkraftmaschine mit einer Steuereinrichtung zur gezielten Ansteuerung einer Kolbenkühldüse oder eines Kolbenkühlkanals sowie Verfahren zum Betreiben einer Brennkraftmaschine
US10227948B2 (en) 2015-12-18 2019-03-12 Mahle International Gmbh Piston for an internal combustion engine
USD886155S1 (en) 2015-12-18 2020-06-02 Mahle International Gmbh Piston for an internal combustion engine
JP6715614B2 (ja) * 2016-02-16 2020-07-01 アート金属工業株式会社 内燃機関用ピストン
GB2578803B (en) * 2019-04-04 2020-12-16 Cox Powertrain Ltd Marine outboard motor with piston cooling gallery
US11326549B2 (en) * 2020-01-21 2022-05-10 Ford Global Technologies, Llc 218-0266 volcano-shaped inlet of piston oil-cooling gallery
CN114251152B (zh) 2020-09-22 2022-12-20 马勒汽车技术（中国）有限公司 内燃机的销连接副的润滑机构
US11248557B1 (en) * 2020-12-03 2022-02-15 Caterpillar Inc. Piston having oil gallery drain outlets biased in distribution to anti-thrust side
DE102021000200A1 (de) 2021-01-18 2022-07-21 Mercedes-Benz Group AG Kolben für eine Verbrennungskraftmaschine

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DE19929102A1 (de) 1999-06-24 2000-12-28 Ks Kolbenschmidt Gmbh Kolben für einen Verbrennungsmotor
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JP2001182613A (ja) * 1999-12-27 2001-07-06 Micro Techno Kk 冷却空洞内蔵ピストン
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Also Published As

Publication number Publication date
EP1799987A1 (fr) 2007-06-27
DE102004043720A1 (de) 2006-03-30
US7748361B2 (en) 2010-07-06
US20080289490A1 (en) 2008-11-27
ATE465338T1 (de) 2010-05-15
ES2341266T3 (es) 2010-06-17
WO2006027157A1 (fr) 2006-03-16
DE502005009468D1 (de) 2010-06-02
PL1799987T3 (pl) 2010-09-30

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