EP3371443A1 - Optimierte nabenabstützung - Google Patents
Optimierte nabenabstützungInfo
- Publication number
- EP3371443A1 EP3371443A1 EP16790990.2A EP16790990A EP3371443A1 EP 3371443 A1 EP3371443 A1 EP 3371443A1 EP 16790990 A EP16790990 A EP 16790990A EP 3371443 A1 EP3371443 A1 EP 3371443A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- recess
- web
- pin bore
- inner region
- 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
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 230000007704 transition Effects 0.000 description 5
- 238000005336 cracking Methods 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007493 shaping process Methods 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
- F02F3/0015—Multi-part pistons
- F02F3/0023—Multi-part pistons the parts being bolted or screwed together
-
- 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, assembled from a cooling channel having upper part and a bolt bore having lower part, wherein the upper part and the lower part facing each other bearing surfaces and the two parts are held together by at least one screw, according to the features of the preamble of claim 1.
- Such built piston also referred to as large piston
- An upper part of such a piston is made equal to it from a lower part of the piston or different methods and made of the same or different materials and the two parts brought together via their mutually facing bearing surfaces, wherein the permanent connection of both parts by means of at least one screw connection.
- pistons are used in internal combustion engines, for example, for locomotives, ships and the like and have compared to pistons, for example, for internal combustion engines of passenger cars on very large dimensions. Accordingly high is not only the load, but also the weight due to the size of the piston.
- the invention is therefore based on the object to provide a piston, in particular a large piston, for internal combustion engines, wherein the weight is reduced while maintaining the required strength to achieve the requirements in the internal combustion engine.
- the lower part starting from its inner area above a vertex of the pin bore, has a recess directed in the direction of an outer circumference and, starting from an outer area, at least one web also pointing in the direction of the outer circumference above the pin hole.
- material is purposely removed at a particular point in order to save weight. This removal of material takes place at those points at which the loads of the piston during operation of the internal combustion engine is reduced as a result of the combustion pressures.
- the removal of material takes place in the inner region of the piston in the case of pistons, in which case the upper part has a bearing surface for the lower part and the lower part has a corresponding bearing surface for the upper part.
- more than one, in particular circumferential bearing surface is present.
- the lower part is weakened due to the deformation of the upper part due to the combustion pressures through the recess (removal of material)
- lower part has at its upper edge a circumferential ridge, to which the above the vertex of the pin bore arranged web is arranged perpendicular thereto.
- the weight is thus reduced by reducing the material by realizing the recess in the inner region of the lower part of the piston and at the same time increasing the strength by means of a web on the outer side above the pin bore.
- a single web is provided above the vertex of the pin bore. While it is alternatively conceivable to provide, for example, two mutually parallel and spaced webs, a single web is of particular advantage because on the one hand, the required support of the upper part exactly in the area in which its greatest deformation occurs, and also the extra weight over one Piston without such a web is not increased to achieve the weight reduction through the recess in the inner region of the lower part of the piston.
- At least one recess is introduced in the lower part in addition to the at least one web.
- Such a further recess has the advantage that at such locations around the pin bore (pin boss) material is removed, through which the strength of the lower part is not or not significantly weakened.
- the recess in the inner region of the piston passes over a rounded region into the inner region of the lower part.
- the upper part has a passage opening in the direction of an inner region located within the upper part above the recess in its inner region. Through this passage, for example, cooling oil can be injected into this interior area within the upper part.
- this inner region within the upper part it is conceivable for a connection to this inner region within the upper part to be created from the cooling channel in order to create an exchange of cooling oil between the circumferential annular cooling channel located behind a ring field and the inner region within the upper part.
- the recess in the inner region of the lower part in this passage preferably rounded rounded, in order to continue to save material and to prevent cracking.
- FIG. 1 an embodiment of a piston 1 in various views and representations (dashed line and three-dimensional representation) is shown.
- the piston 1 has an upper part 2 and a lower part 3.
- the upper part 2 is designed in a manner known per se and has at least one annular field (in this case with three annular grooves), just as, for example, a combustion bowl, valve pockets and the like.
- a cooling channel 4 is created, for which purpose the two parts 2, 3 have corresponding annular downwardly or upwardly open recesses.
- With 5 is an interior area designated, which also results from the assembly of the two parts 2, 3.
- the lower part 3 has a pin bore 6 (with surrounding bolt hub, unspecified). Through the unspecified pin axis of the pin bore 6 extends a piston stroke axis 7, wherein 8 is an overhead vertex of the pin hole 6 is designated. Furthermore, the lower part 3 has a directed in the direction of the inner region 5 passage opening 9, as well as a piston skirt and further, known per se elements for realizing the function of the lower part 3 of the piston. 1
- the lower part 3 has in its inner region a recess 10, which is arranged above the vertex 8 of the pin bore 6.
- the recess 10 starts from the inner region of the lower part 3 in the direction of the outer circumference of the piston 1, without creating an opening in the direction of the outer circumference.
- the recess 10 has the shaping shown in an advantageous manner, wherein the edge regions of the recess 10 merge into the inner region of the lower part 3 via a rounded transition 11.
- the upper part 2 is connected (screwed) to the lower part 3 by means of a screw connection 12.
- the screw 12 in Figure 4 is the sake of completeness only indicated, so that although not shown, but is present, a passage opening in the lower part 3 for a screw which is performed through this opening from below and screwed into a corresponding thread in the upper part 2 becomes.
- These Screw 12 is distributed over the circumference several times, at least twice available.
- a corresponding with the recess 10 web 13 can be seen, which is also located above the apex 8 of the pin bore +6.
- This web 13 stands out from the surface of the pin boss around the pin bore 6 around.
- a recess 14 is provided next to the web 13 (either only on the right or only on the left or on both sides).
- the upper end of the web 13 can be supported either directly on the underside of the upper part 2, wherein it can be seen that the lower part 3 has at its upper end between the two side edges of the piston skirt an arcuate web portion which is supported by the web 13 becomes.
- FIGS. 7 to 9 show a first exemplary embodiment of the shape of the recess 10. Very well, the position of the recess 10 in the lower part 3 is recognizable. Reference is made in particular to FIG. 8, from which it can be seen that the recess 10 extends from the inner region of the lower part 3 in the direction of the outer circumference of the piston 1 (when viewed in FIG. 8, the right-hand end of the hatched region).
- FIGS. 10 to 12 A further embodiment of the recess 10 is shown in FIGS. 10 to 12. It can be seen above all that the recess 10 passes over a rounded transition 1 1 in the interior of the lower part 3.
- a rounded transition 1 1 can also be provided in the recess 10 according to Figure 7 to 9.
- the interaction of the recess 10 and the web 13 is very clearly visible.
- FIG. 14 once again shows the lower part 3 in a three-dimensional representation, it being very clearly recognizable in the upper part of this FIG. 14 that the lower part 3 has a shoulder which forms a support surface for the upper part 2.
- the recess 10 and the correlating web 13 according to the invention respectively mirror images on both sides of the piston stroke 7, ie to each pin hole 6, is available.
- pin bore is understood in each case a hole in the lower part 3, in each of which one end of a piston pin is arranged and the intermediate portion receives the small connecting rod eye.
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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015221370 | 2015-11-02 | ||
PCT/EP2016/076458 WO2017076920A1 (de) | 2015-11-02 | 2016-11-02 | Optimierte nabenabstützung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3371443A1 true EP3371443A1 (de) | 2018-09-12 |
EP3371443B1 EP3371443B1 (de) | 2024-04-10 |
Family
ID=57233451
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16790990.2A Active EP3371443B1 (de) | 2015-11-02 | 2016-11-02 | Optimierte nabenabstützung |
Country Status (7)
Country | Link |
---|---|
US (1) | US10871125B2 (de) |
EP (1) | EP3371443B1 (de) |
JP (1) | JP6692424B2 (de) |
KR (1) | KR20180078251A (de) |
CN (1) | CN108271404B (de) |
DE (1) | DE102016120907A1 (de) |
WO (1) | WO2017076920A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110869600A (zh) | 2017-04-19 | 2020-03-06 | Ks科尔本施密特有限公司 | 具有一种结构形式的活塞 |
DE102018128512A1 (de) | 2017-11-14 | 2019-05-16 | Ks Kolbenschmidt Gmbh | Stahlkolben mit optimiertem Design |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB268399A (en) * | 1925-10-07 | 1927-04-07 | Adolph Lincoln Nelson | Pistons |
DE2307347A1 (de) | 1973-02-15 | 1974-08-22 | Maschf Augsburg Nuernberg Ag | Mehrteiliger tauchkolben fuer viertaktbrennkraftmaschinen, insbesondere grossdieselmotoren |
DE2919638A1 (de) * | 1979-05-16 | 1980-11-20 | Schmidt Gmbh Karl | Kolben fuer brennkraftmaschinen |
JPS59168556U (ja) * | 1983-04-27 | 1984-11-12 | ヤンマーディーゼル株式会社 | 組合せピストン構造 |
DE3842321A1 (de) * | 1988-12-16 | 1990-06-21 | Kolbenschmidt Ag | Kolben mit oelkuehlung fuer brennkraftmaschinen |
ES2266011T3 (es) * | 1999-10-08 | 2007-03-01 | Federal-Mogul Corporation | Piston con doble galeria. |
DE60041153D1 (de) * | 1999-12-30 | 2009-01-29 | Federal Mogul Corp | Kolben mit entkoppeltem schaftteil |
GB2366607B (en) * | 2000-09-06 | 2004-06-09 | Federal Mogul Bradford Ltd | Piston for internal combustion engine |
AU2002213255A1 (en) * | 2000-10-18 | 2002-04-29 | Federal Mogul Corporation | Multi-axially forged piston |
US7104183B2 (en) * | 2004-07-07 | 2006-09-12 | Karl Schmidt Unisia, Inc. | One-piece steel piston |
DE102005041409A1 (de) * | 2005-09-01 | 2007-03-08 | Mahle International Gmbh | Zweiteiliger Kolben für einen Verbrennungsmotor |
JP4838858B2 (ja) * | 2005-12-17 | 2011-12-14 | マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング | 内燃機関用の2部分から成るピストン |
DE102006055251A1 (de) | 2006-11-23 | 2008-05-29 | Mahle International Gmbh | Zweiteiliger Kolben für einen Verbrennungsmotor |
DE102009045437A1 (de) | 2009-10-07 | 2011-04-14 | Federal-Mogul Nürnberg GmbH | Kolben für einen Verbrennungsmotor und Verbrennungsmotor mit einem Kolben |
DE102009059056A1 (de) * | 2009-12-18 | 2011-06-22 | MAHLE International GmbH, 70376 | Kolben für einen Verbrennungsmotor |
DE102010025508A1 (de) * | 2010-06-29 | 2011-12-29 | Mahle International Gmbh | Kolben für einen Verbrennungsmotor |
-
2016
- 2016-11-02 JP JP2018522677A patent/JP6692424B2/ja active Active
- 2016-11-02 KR KR1020187012686A patent/KR20180078251A/ko not_active Application Discontinuation
- 2016-11-02 EP EP16790990.2A patent/EP3371443B1/de active Active
- 2016-11-02 DE DE102016120907.4A patent/DE102016120907A1/de not_active Ceased
- 2016-11-02 US US15/772,205 patent/US10871125B2/en active Active
- 2016-11-02 CN CN201680062610.1A patent/CN108271404B/zh active Active
- 2016-11-02 WO PCT/EP2016/076458 patent/WO2017076920A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2017076920A1 (de) | 2017-05-11 |
CN108271404A (zh) | 2018-07-10 |
DE102016120907A1 (de) | 2017-05-04 |
EP3371443B1 (de) | 2024-04-10 |
JP6692424B2 (ja) | 2020-05-13 |
US10871125B2 (en) | 2020-12-22 |
US20180313293A1 (en) | 2018-11-01 |
KR20180078251A (ko) | 2018-07-09 |
JP2018534470A (ja) | 2018-11-22 |
CN108271404B (zh) | 2021-07-20 |
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