EP1799987A1 - Piston pour moteur a combustion interne, et moteur a combustion interne - Google Patents
Piston pour moteur a combustion interne, et moteur a combustion interneInfo
- Publication number
- EP1799987A1 EP1799987A1 EP05784034A EP05784034A EP1799987A1 EP 1799987 A1 EP1799987 A1 EP 1799987A1 EP 05784034 A EP05784034 A EP 05784034A EP 05784034 A EP05784034 A EP 05784034A EP 1799987 A1 EP1799987 A1 EP 1799987A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- opening
- coolant
- combustion engine
- outflow
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 17
- 239000002826 coolant Substances 0.000 claims abstract description 60
- 238000001816 cooling Methods 0.000 claims abstract description 57
- 238000005461 lubrication Methods 0.000 description 7
- 230000002349 favourable effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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.
- a piston is known in which a ring carrier is provided with a cooling channel plate, which may have a plurality of flat spots.
- 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.
- EP 1 231 374 A2 discloses a piston which, in areas adjacent to the piston pin bosses, has various overhanging areas. These are acted upon from the side of the piston housing forth with cooling oil, which can flow in sections through so-called passage channels.
- 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 solution of this object is achieved by the piston described in claim i.
- 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. Rather, the cooling medium, which flows from the inflow opening via a corresponding channel section to a, from other drainage openings fluidly separated outflow ,. emerge unhindered from this drain opening. 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 feature combination which is novel over the prior art and achieves the advantages according to the invention can be seen in that a largely 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.
- At least one flow dividing element in the region of the inflow opening.
- This may be, for example, a rib or a bead, to which the supplied for example via a nozzle Coolant flow flows.
- 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. This is preferred
- 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 with respect Outlet openings is provided asymmetrically. 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 cooling channel of the piston according to the invention is designed to be largely circumferential.
- 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. Since there is no continuation of the peripheral design in certain embodiments, a cooling channel designed in this way is described as substantially circumferential.
- 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 of the piston according to the invention and the flow generated therein;
- 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 port 14 at which the coolant flow through a flow dividing element 16, preferably in the form of a rib or a bead in the two substreams in the cooling duct sections 12.1 and is split 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 should be understood that the illustration 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 can not be seen in the schematic representation of FIG. 1, but is apparent from FIG.
- FIG. 2 shows a piston 20 according to the invention from the underside, so that the one inflow opening 14 and the two outflow 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. As the flow divider element 16 flows against the coolant jet, it is partially directed into one of the 12.1 and the other cooling duct sections 12.2 (see FIG. 2, these sections 12 each extend approximately semicircular starting from the inflow opening 14 in the region above the pin bosses to be recognized in FIG
- Cooling duct sections 12 each have their own outlet opening 18. In the region of the respective outflow opening 18, a deflection takes place "downwards", that is to say according to the representation of FIG. 2 in the direction of the observer.
- a deflection takes place "downwards", that is to say according to the representation of FIG. 2 in the direction of the observer.
- 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 bosses” is understood to mean the approximately strip-shaped area between the inflow opening 14 and the outflow opening 18. 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 into 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 to the left-hand outlet opening 18.1 in FIG. 1 is shorter than the other cooling channel section.
- the inflow opening 14 may also be arranged centrally between the piston pin bosses 22. Likewise, unlike in FIG. 2, it may be provided offset further 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.
- the flow dividing element 16 can be seen.
- the cross section of the cooling channel 12.1, 12.2 is at least substantially constant over the extent of each 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 illustration of Fig. 3, the piston is rotated slightly to the right, so that the inner surface of the left piston pin eye 22 can be seen.
- Fig. 4 it is a view perpendicular to a (imaginary) piston pin axis.
- Fig. 4 it can be seen that in this view, the two drainage openings 18.1 and 18.2 are symmetrical to each other, while it is apparent from the comparison with Fig. 3, that the inflow opening is provided asymmetrically.
- Fig. 4 can also be seen that the two outflow openings 18.1 and 18.2 are indeed connected by a small passage 24 with each other.
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)
Abstract
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 true EP1799987A1 (fr) | 2007-06-27 |
EP1799987B1 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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
EP2541004B1 (fr) * | 2010-02-23 | 2014-05-14 | Honda Motor Co., Ltd. | Dispositif de refroidissement de piston |
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 |
USD886155S1 (en) | 2015-12-18 | 2020-06-02 | Mahle International Gmbh | Piston for an internal combustion engine |
US10227948B2 (en) | 2015-12-18 | 2019-03-12 | 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 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2865348A (en) * | 1955-03-23 | 1958-12-23 | Schmidt Gmbh Karl | Piston |
FR2238372A5 (fr) * | 1973-07-19 | 1975-02-14 | Dampers | |
US4206726A (en) * | 1977-07-18 | 1980-06-10 | Caterpillar Tractor Co. | Double orifice piston cooling nozzle for reciprocating engines |
IT1118774B (it) * | 1979-06-12 | 1986-03-03 | Ass Eng Italia | Perfezionamento relativo aglistantuffi nei motori diesel |
US4428330A (en) * | 1982-09-08 | 1984-01-31 | Kabushiki Kaisha Komatsu Seisakusho | Piston for internal combustion engines |
JPS60192860A (ja) * | 1984-03-14 | 1985-10-01 | Toyota Motor Corp | 内燃機関用ピストン |
US5595145A (en) * | 1995-05-31 | 1997-01-21 | Kabushiki Kaisha Komatsu Seisakusho | Cooling structure of diesel engine piston |
DE19618625C1 (de) | 1996-05-09 | 1997-10-23 | Daimler Benz Ag | Flüssigkeitsgekühlter Kolben für Verbrennungsmotoren |
DE19703001C2 (de) | 1997-01-28 | 1998-12-03 | Alcan Gmbh | Flüssigkeitsgekühlter Kolben |
US6032619A (en) * | 1998-07-16 | 2000-03-07 | Federal-Mogul World Wide, Inc. | Piston having a tube to deliver oil for cooling a crown |
DE19929102A1 (de) | 1999-06-24 | 2000-12-28 | Ks Kolbenschmidt Gmbh | Kolben für einen Verbrennungsmotor |
DE19930630C1 (de) | 1999-07-02 | 2000-10-26 | Federal Mogul Nuernberg Gmbh | Flüssigkeitsgekühlter Kolben |
DE19935399A1 (de) * | 1999-07-30 | 2001-02-01 | Ks Kolbenschmidt Gmbh | Kolben für einen Verbrennungsmotor |
JP2001182613A (ja) * | 1999-12-27 | 2001-07-06 | Micro Techno Kk | 冷却空洞内蔵ピストン |
DE10106435A1 (de) | 2001-02-13 | 2002-08-14 | Bayerische Motoren Werke Ag | Kolben, insbesondere für eine Brennkraftmaschine |
US6532913B1 (en) * | 2001-11-27 | 2003-03-18 | Caterpillar Inc | Piston cooling fin |
DE10218653B4 (de) | 2002-04-26 | 2009-01-29 | Ks Kolbenschmidt Gmbh | Ringträger mit einem Kühlkanalblech, das eine Flachstelle aufweist |
-
2004
- 2004-09-09 DE DE102004043720A patent/DE102004043720A1/de not_active Withdrawn
-
2005
- 2005-09-01 DE DE502005009468T patent/DE502005009468D1/de active Active
- 2005-09-01 ES ES05784034T patent/ES2341266T3/es active Active
- 2005-09-01 AT AT05784034T patent/ATE465338T1/de not_active IP Right Cessation
- 2005-09-01 PL PL05784034T patent/PL1799987T3/pl unknown
- 2005-09-01 US US11/575,010 patent/US7748361B2/en active Active
- 2005-09-01 WO PCT/EP2005/009420 patent/WO2006027157A1/fr active Application Filing
- 2005-09-01 EP EP05784034A patent/EP1799987B1/fr not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2006027157A1 * |
Also Published As
Publication number | Publication date |
---|---|
US7748361B2 (en) | 2010-07-06 |
WO2006027157A1 (fr) | 2006-03-16 |
DE502005009468D1 (de) | 2010-06-02 |
US20080289490A1 (en) | 2008-11-27 |
EP1799987B1 (fr) | 2010-04-21 |
DE102004043720A1 (de) | 2006-03-30 |
ATE465338T1 (de) | 2010-05-15 |
PL1799987T3 (pl) | 2010-09-30 |
ES2341266T3 (es) | 2010-06-17 |
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