EP3555451A1 - Kühlkanal mit damm und trichter - Google Patents
Kühlkanal mit damm und trichterInfo
- Publication number
- EP3555451A1 EP3555451A1 EP17822262.6A EP17822262A EP3555451A1 EP 3555451 A1 EP3555451 A1 EP 3555451A1 EP 17822262 A EP17822262 A EP 17822262A EP 3555451 A1 EP3555451 A1 EP 3555451A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- cooling channel
- dam
- opening
- inlet 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.)
- Granted
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/18—Making machine elements pistons or plungers
- B21K1/185—Making machine elements pistons or plungers with cooling channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/06—Arrangements for cooling pistons
- F01P3/10—Cooling by flow of coolant through pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant 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
- F02F2200/00—Manufacturing
- F02F2200/04—Forging of engine parts
Definitions
- the invention relates to a piston, comprising an upper part and a lower part, which are joined, with a cooling channel, preferably an annular circumferential cooling channel, wherein for the purpose of supplying cooling oil at least one inlet opening and for the purpose of expiry of the cooling oil at least one drain opening is provided according to the features the preamble of claim 1.
- Said inlet or drain opening extends from an inner region of the piston in the direction of the cooling channel and passes through the lower wall, in particular the lower vertex of the cooling channel.
- the opening is at the lowest point of the cooling channel, so that cooling oil always flows out of the cooling channel at least when the piston is stationary and can not be stored there.
- a piston for an internal combustion engine having a piston upper part and a piston lower part which has an inner, preferably annular cooling channel for cooling the piston during operation of the internal combustion engine.
- At least one inlet opening and at least one outlet opening is provided on the piston lower part, via which a coolant inflow and coolant outlet into or out of the cooling channel takes place.
- the respective opening is surrounded by a torus or a ramp-like elevation, which prevents a drop in a coolant level below a predefined level.
- the annular bead or the ramp-like increase is integral with the Kolbenuntertei! educated.
- the invention has for its object to provide a piston with a cooling channel, which is improved in terms of its cooling effect compared to the known piston with kuhikanälen.
- both a dam-shaped elevation in the region of the inlet and / or discharge opening by a finished forged contour of the lower cooling channel region and on the inside of the piston, the inlet contour of the inlet and / or drain opening are formed by pre-forging.
- contours that allow a minimum level or minimum level to be maintained in the cooling gallery (particularly when the piston is stopped) can be realized in a forging process directly with the upper part of the piston being produced independently of the lower part of the piston become.
- the production by forging has the advantage of a high-strength structure and stress-oriented flow lines, so that a high-strength upper part lower part is formed that already has the necessary contours for the realization of its function.
- the pre-forging at the inlet opening is funnel-shaped, whereas it is complementary or alternatively on the discharge side (ie in the region of the Abiaufö réelle) cylindrical.
- a dam is produced (formed) in the production of the upper part lower part during the forging as a dam-shaped elevation which runs across the width of the cooling channel (ie extends radially outward from the direction of the piston center point through which the piston stroke axis extends). , so that a flow past the dam-shaped increase (dam) in the cooling channel is largely prevented, whereas in the piston according to DE 10 2011 007 285 A1, a flow-in is possible.
- the increase should reach a height of 20% to 80%, preferably 30% to 70% of the total height of the cooling channel.
- the dam (the dam-shaped elevation) produced transversely to the cooling channel has at least one recess, preferably a plurality of recesses, at the transition between the dam and the wall of the cooling channel.
- the cooling channel is optionally also forged and produced in the region of the inlet opening a V-shaped element which projects into thedekanai forged, which ensures that the impinging jet of oil in both directions of the cooling channel is deflected in equal or different parts.
- This V-shaped element thus serves as a beam splitter for the impinging jet of oil which is injected through the inlet opening.
- an improved cooling effect for the thermally stressed areas of the piston is achieved by the measures to the cooling channel in which the dam-shaped increase ensures a specifiable coolant level remaining in the cooling channel and at the same time does not hinder the incoming oil jet by a return flow.
- the funnel-shaped design of the inlet opening of the degree of capture of the effectively entering the cooling channel oil is used to capture the oil flow rates of at least two parallel or inclined to each other ⁇ gelen (emitted by a spray nozzle or more than one spray nozzle) over wide areas of the piston stroke and to direct the oil in the cooling channel.
- the funnel-shaped forging can take all surface shapes. The oil rushed through the oil spray nozzle can emerge from one or more nozzle openings, wherein not all nozzle openings need to be opened simultaneously.
- the design of the opposite contours of dam and funnel provides the possibility of realizing as uniform a wall thickness as possible, which has a positive effect on the production process and the weight of the piston, whereby the effectiveness of the production of the piston can be increased even further, by the top of the cooling channel is also made by a forging process in the piston upper part and thus a processing or a post-processing can largely or completely eliminated.
- the invention provides an improvement in the cooling effect by integrally formed on the piston contours without additional elements. This results in a more efficient production of the piston and the processes are simplified. In addition, such a piston can be exposed to higher thermal loads while reducing the cooling oil requirement.
- a piston 1 is shown in a section, which consists of a lower part 2 and an upper part 3.
- the two parts 2, 3 are made separately and joined together in a suitable manner.
- the piston 1 has in known manner an outer circumferential annular field 4 and may, but need not, contain a combustion bowl.
- the lower part 3 forms a piston skirt 5 and a pin bore 6.
- the two parts 2, 3 are permanently and inextricably linked to each other by means of a suitable joining process, so as to form a one-piece functionally ready piston 1.
- the joining process runs in at least one joining plane 7.
- the joining process is a friction welding process.
- the piston 1 has a cooling channel 8.
- the cooling channel 8 is formed by partial recesses in both the upper part 2 and the lower part 3. This has the advantage that before the joining of the two parts 2, 3 whose partial recesses are accessible and therefore these partial recesses are optimally manufactured or reworked can, since they are no longer accessible after joining the two parts 2, 3.
- the piston 1 at least one inlet opening 9, in which a free jet of oil, which is discharged from an injection nozzle, is injected in the direction of the cooling channel 8.
- this dam-shaped elevation 10 is formed with production of the lower part 3.
- the lower part 3 can thus be produced for example in a casting process and thereby the dam-shaped increase can be formed.
- the lower part 3 can be produced in a casting process and then the dam-shaped elevation 10 can be formed by a forming process (such as, for example, a forging process).
- both the lower part 3 with its geometries and the dam-shaped elevation 10 are produced in a forming process (such as, for example, a forging process).
- this lower part receives an inner geometry 11 with a particular funnel-shaped inlet contour 12 of the inlet opening 9.
- the inlet contour 12 may also have a different shape than a funnel shape. It is important to form the entry contour 12, preferably in a forging process, while giving it a shape with which the oil jet injected into the inlet opening 9 is directed in the direction of the cooling channel 8. It is also important that the dam-shaped elevation 10 next to the inlet opening 9 does not hinder the entry of the injected oil jet, so that the injected oil is circulated in the cooling channel 8.
- Figure 2 shows a plan view of the top of the lower part 3, which faces in the direction of the upper part 2.
- an inlet opening 9 and a drain opening 13 is present.
- exactly one inlet opening 9 and exactly one inlet opening 13 is provided, starting from which a frightening circumferential cooling channel 8 is present.
- the cooling channel 8 is not formed completely encircling, but is divided into, for example, at least two Teiisegmente. In this case, for example, each sub-segment has its own inlet opening and its own ⁇ biaufö réelle.
- a dam-shaped elevation 10 is provided on the lower part 3 on each side in the direction of the cooling channel 8 next to the inlet opening 9 and the outlet opening 13 and is formed integrally therefrom.
- the lower part 3 has an outer peripheral joining surface 14 and an inner peripheral joining surface 15, which are formed by corresponding webs of the lower part 3.
- These joining surfaces 14,15 have corresponding joining surfaces of the upper part 2, which also forms webs, at the conclusion of the joining surfaces are formed.
- the two parts 2, 3 are preferably permanently and inextricably joined together by means of a friction welding process.
- Other geometric configurations of the two parts 2, 3 and other joining methods, which ensure a permanent and permanent detachment of the two parts 2, 3 with each other are also conceivable.
- Figure 3 shows in a sectional three-dimensional view of the piston 1, in which the two parts 2, 3 have been permanently and permanently joined together.
- the position of both the inlet opening 9 with at least one associated dam-shaped elevation 10 and the position of the drain opening 13 (in this case, with an associated dam-shaped increase 0) can be seen.
- FIG. 4 shows, analogously to the illustration in FIG. 2, a three-dimensional view of the plan view of the upper part 3, wherein, as can also be seen in FIG. 2, a partial region of the cooling channel 8 is formed by the upper part 3.
- FIG. 5 shows, in a three-dimensional view, the underside of the upper part 2, which points in the direction of the lower part 3.
- a dam-shaped elevation 10 for example in the region of the inlet opening 9) of FIG. 4 also has a dam-shaped elevation 10 in the partial region of the cooling element 8 of the upper part 2
- the at least one dam-shaped elevation 10 is not arranged next to the opening, but is located in the extension of the cross-section of the opening (inlet opening 9 and / drain opening 13), so that this dam-shaped elevation 10 in the partial region of the cooling channel 8 of the upper part 2 serves as a beam splitter.
- the oil jet injected in particular by the at least one inlet opening 9 is divided and can be divided into the same or different parts in both directions of the cooling channel 8.
- FIG. 5 shows that the dam-shaped elevation 10, which is produced transversely to the cooling channel 8, has at least one recess 16, preferably a plurality of recesses, at the transition between the elevation 10 and the wall of the cooling channel 8, in particular in the apex region of the cooling channel 8 ,
- FIG. 6 shows the internal geometry 11 of the piston 1 in which the parts 2, 3 described above have been joined together.
- a dam-shaped elevation 10 serving as a beam splitter is provided.
- At least one dam-shaped elevation 10th is present in the subregion of the lower part 3 next to the inlet opening 9 ⁇ and optionally also adjacent to the drain opening 13.
- the orientation of the dam-shaped elevation 10 shown either in the lower part 3 and / or the upper part 2 is exemplary and preferably extends radially from the Koibenhubachse. Other radial orientations deviating from this are of course also conceivable. LIST OF REFERENCE NUMBERS
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016124804 | 2016-12-19 | ||
| PCT/EP2017/083578 WO2018114969A1 (de) | 2016-12-19 | 2017-12-19 | Kühlkanal mit damm und trichter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3555451A1 true EP3555451A1 (de) | 2019-10-23 |
| EP3555451B1 EP3555451B1 (de) | 2024-12-04 |
Family
ID=60857071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17822262.6A Active EP3555451B1 (de) | 2016-12-19 | 2017-12-19 | Kühlkanal mit damm und trichter |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US11053885B2 (de) |
| EP (1) | EP3555451B1 (de) |
| CN (1) | CN110121590B (de) |
| DE (1) | DE102017130546A1 (de) |
| MX (1) | MX2019006067A (de) |
| PL (1) | PL3555451T3 (de) |
| WO (1) | WO2018114969A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11326549B2 (en) * | 2020-01-21 | 2022-05-10 | Ford Global Technologies, Llc | 218-0266 volcano-shaped inlet of piston oil-cooling gallery |
| DE102021133609B3 (de) | 2021-12-17 | 2023-02-02 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Kolben mit funktionsoptimierten Kolbenkühlung |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5924853Y2 (ja) * | 1977-05-11 | 1984-07-23 | ヤンマーディーゼル株式会社 | 内燃機関用ピストン |
| JP2003307153A (ja) * | 2002-04-11 | 2003-10-31 | Toyota Industries Corp | 内燃機関のピストン |
| FR2839116B1 (fr) * | 2002-04-24 | 2004-10-15 | Renault Sa | Piston a galerie de refroidissement pour moteur a combustion interne |
| US9238283B2 (en) | 2008-07-24 | 2016-01-19 | Ks Kolbenschmidt Gmbh | Friction welded steel piston having optimized cooling channel |
| DE102010056220A1 (de) * | 2010-12-24 | 2012-06-28 | Mahle International Gmbh | Kolben für einen Verbrennungsmotor |
| DE102011007285A1 (de) | 2011-04-13 | 2012-10-18 | Mahle International Gmbh | Kolben für eine Brennkraftmaschine |
| EP2761210B1 (de) | 2011-09-28 | 2016-11-30 | KS Kolbenschmidt GmbH | Zweiteiliger stahlkolben für brennkraftmaschinen |
| CN106164455B (zh) | 2014-02-21 | 2020-03-17 | Ks科尔本施密特有限公司 | 不具有封闭的冷却室的、用于每个缸设有至少一个冷却油喷嘴的内燃机的活塞以及用于冷却所述活塞的方法 |
| PL3129629T3 (pl) | 2014-04-09 | 2018-11-30 | Ks Kolbenschmidt Gmbh | Przedłużony dopływ kanału chłodzenia dla tłoków z kanałem chłodzenia i sposób jego działania |
| CN106337754B (zh) * | 2015-07-10 | 2018-11-30 | 强哲菲 | 一种水平式活塞及水平对置发动机 |
| EP3377244B1 (de) | 2015-11-19 | 2025-12-31 | KS Kolbenschmidt GmbH | Gegossene zu- und ablauföffnungen bei stahlguss- und eisen-gusskolben |
-
2017
- 2017-12-19 EP EP17822262.6A patent/EP3555451B1/de active Active
- 2017-12-19 DE DE102017130546.7A patent/DE102017130546A1/de not_active Ceased
- 2017-12-19 WO PCT/EP2017/083578 patent/WO2018114969A1/de not_active Ceased
- 2017-12-19 PL PL17822262.6T patent/PL3555451T3/pl unknown
- 2017-12-19 MX MX2019006067A patent/MX2019006067A/es unknown
- 2017-12-19 US US16/470,642 patent/US11053885B2/en active Active
- 2017-12-19 CN CN201780078519.3A patent/CN110121590B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| MX2019006067A (es) | 2019-08-12 |
| US11053885B2 (en) | 2021-07-06 |
| US20190323450A1 (en) | 2019-10-24 |
| CN110121590A (zh) | 2019-08-13 |
| EP3555451B1 (de) | 2024-12-04 |
| PL3555451T3 (pl) | 2025-04-14 |
| CN110121590B (zh) | 2022-06-10 |
| DE102017130546A1 (de) | 2018-06-21 |
| WO2018114969A1 (de) | 2018-06-28 |
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