WO2008061486A2 - Zweiteiliger kolben für einen verbrennungsmotor - Google Patents
Zweiteiliger kolben für einen verbrennungsmotor Download PDFInfo
- Publication number
- WO2008061486A2 WO2008061486A2 PCT/DE2007/001886 DE2007001886W WO2008061486A2 WO 2008061486 A2 WO2008061486 A2 WO 2008061486A2 DE 2007001886 W DE2007001886 W DE 2007001886W WO 2008061486 A2 WO2008061486 A2 WO 2008061486A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston
- bearing surfaces
- chromium layer
- partly
- microns
- 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.)
- Ceased
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
-
- 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
-
- 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
- F02F3/10—Pistons having surface coverings
-
- 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
- F05C2201/0403—Refractory metals, e.g. V, W
- F05C2201/0406—Chromium
-
- 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
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/12—Coating
Definitions
- the invention relates to a two-part piston for an internal combustion engine according to the preamble of claim 1.
- German Patent Application No. 10 2006 015 587.4 discloses an upper part of a built-up piston which, on its lower side facing away from the piston crown, has an annular rib with an inner contact surface and an annular wall with an outer contact surface.
- Schwingungsreibverschl In order to avoid assembly of the piston upper part with a piston lower part in engine operation, resulting in relative movements of the piston upper part and the piston, Schwingungsreibverschl excreibverschl excreibverschl generate and welds the contact surfaces of the two piston parts and thus wear of the contact surfaces to be incorporated into the contact surfaces of the upper groove-shaped recesses.
- the recesses are made by turning or by means of a laser, which has the disadvantage that the production of the recesses is relatively complicated and expensive.
- FIG. 1 is a sectional view of an existing of an upper part and a lower part of the piston, which are bolted together by means of expansion bolts,
- FIG. 2 is a perspective view of the lower part of the piston and the bearing surfaces over which the upper part of the piston rests on the lower part
- Fig. 3 is a perspective view of the upper part of the piston and the bearing surfaces
- Fig. 4 shows a cross section of the support surface with a chromium layer.
- Fig. 1 shows a piston 1 for an internal combustion engine, which consists of an upper part 2 and a lower part 3.
- the upper part 2 made of steel and the lower part 3 made of nodular cast iron or aluminum, or the upper part 2 and the lower part 3 of the piston 1 made of steel.
- the upper part 2 and the lower part 3 are screwed together by means of two expansion screws 4 and 5.
- the upper part 2 forms the piston head 6, in which a combustion bowl 7 is arranged.
- the piston 1 radially outwardly a circumferential cooling channel 8, which is partly formed in the upper part 2 and partly in the lower part 3 of the piston 1.
- the cooling channel 8 is bounded radially on the outside by a ring wall 9 connected to the piston head 6 and radially inwardly by the piston head 6, partly by a circumferential upper annular rib 10 formed on the underside of the upper part 2 facing away from the piston crown and partly by a side of the lower part facing the piston head 3 attached lower annular rib 11.
- two holes 12 and 13 and in the upper ring flu 10 two blind holes 14 and 15 are introduced with internal thread in the lower annular rib.
- an inner cooling space 17 is limited, which has a lower opening 18 through which cooling oil is injected into the inner cooling space 17. 2, the cooling oil passes from the cooling space 17 into the cooling channel 8, which has an oil drain opening 20 shown in FIG. 2, via which the cooling oil is conducted into the piston interior 21.
- the lower part 3 of the piston 1 furthermore has a piston shaft 22 and two pin bores 23 and 24, which are shown in FIGS. 1 and 2.
- the upper annular rib 10 has on its underside and the lower annular rib 11 on its upper side in each case an inner, ring-shaped Positioning surface 25, 26, over which the radially inner portions of the upper part 2 and the lower part 3 of the piston 1 lie on one another.
- the end face of the annular wall 9 facing away from the piston crown and a collar 27 mounted on the upper side of the lower part 3 each have an outer, annular bearing surface 28 and 29, over which the radially outer regions of the upper part 2 and of the lower part 3 rest on one another.
- the distance of the inner bearing surfaces 25, 26 from the piston head 6 is less than the distance between the outer bearing surfaces 28, 29 from the piston head. 6
- the surface of the chromium layer 30 in this case has the form of buds or nubs.
- the roughness Rz of the chromium layer 30 is between 10 ⁇ m and 25 ⁇ m.
- the surface-structured chromium layer 30 can be applied by an electrochemical (galvanic) path, wherein nucleation processes of the chromium are triggered by means of electrical voltage pulses on the bearing surfaces and subsequently the growth of the chromium nuclei is effected by further chromium addition by means of further sequence pulses.
- the bearing surfaces 25, 26, 28, 29 of the upper part 2 and the lower part 3 existing, screwed piston 1 move in engine operation relative to each other, so that this results in a Schwingungsreibverschl founded on the bearing surfaces and a friction welding of the bearing surfaces.
- material welds of parts of the bearing surfaces result with attributable to it, partial material triggering.
- the surface The patterned chromium layer 30 according to the invention has the advantage that the oil retention volume of the structured surface of the chromium layer 30 is improved, thereby avoiding the vibration-wear and the friction welding of the relatively moving bearing surfaces.
- the structuring of the surface of the chromium layer 30 reduces the pressure-related, partial material welding and damage to the bearing surfaces.
- the chromium layer 30 is harder and thus more resistant to wear than the piston base material, so that the chromium layer has a lower frictional wear during engine operation than the prior art chromium-plated piston base material.
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
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/312,742 US8631736B2 (en) | 2006-11-23 | 2007-10-23 | Two-part piston for an internal combustion engine |
| EP07817720A EP2094961A2 (de) | 2006-11-23 | 2007-10-23 | Zweiteiliger kolben für einen verbrennungsmotor |
| CN2007900001120U CN202039963U (zh) | 2006-11-23 | 2007-10-23 | 用于内燃机的两件式活塞 |
| KR1020097010284A KR101394777B1 (ko) | 2006-11-23 | 2007-10-23 | 내연 기관용 투 파트형 피스톤 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006055251A DE102006055251A1 (de) | 2006-11-23 | 2006-11-23 | Zweiteiliger Kolben für einen Verbrennungsmotor |
| DE102006055251.2 | 2006-11-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2008061486A2 true WO2008061486A2 (de) | 2008-05-29 |
| WO2008061486A3 WO2008061486A3 (de) | 2011-03-03 |
Family
ID=39204929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2007/001886 Ceased WO2008061486A2 (de) | 2006-11-23 | 2007-10-23 | Zweiteiliger kolben für einen verbrennungsmotor |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8631736B2 (de) |
| EP (1) | EP2094961A2 (de) |
| KR (1) | KR101394777B1 (de) |
| CN (1) | CN202039963U (de) |
| DE (1) | DE102006055251A1 (de) |
| WO (1) | WO2008061486A2 (de) |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009015820A1 (de) * | 2009-04-01 | 2010-10-07 | Mahle International Gmbh | Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung |
| US8065985B2 (en) * | 2009-05-04 | 2011-11-29 | Federal-Mogul Corporation | Piston having a central cooling gallery with a contoured flange |
| US10180115B2 (en) | 2010-04-27 | 2019-01-15 | Achates Power, Inc. | Piston crown bowls defining combustion chamber constructions in opposed-piston engines |
| US9512779B2 (en) | 2010-04-27 | 2016-12-06 | Achates Power, Inc. | Swirl-conserving combustion chamber construction for opposed-piston engines |
| JP5782109B2 (ja) | 2010-04-27 | 2015-09-24 | アカーテース パワー,インク. | 対向ピストン式エンジン用の燃焼室構造 |
| WO2012158756A1 (en) | 2011-05-18 | 2012-11-22 | Achates Power, Inc. | Combustion chamber construction for opposed-piston engines |
| EP2606212B1 (de) | 2010-08-16 | 2018-10-03 | Achates Power, Inc. | Kolbenkonstruktionen für motoren mit entgegengesetzten kolben |
| US8820294B2 (en) | 2010-08-16 | 2014-09-02 | Achates Power, Inc. | Fuel injection spray patterns for opposed-piston engines |
| US20130104848A1 (en) | 2011-10-27 | 2013-05-02 | Achates Power, Inc. | Fuel Injection Strategies in Opposed-Piston Engines with Multiple Fuel Injectors |
| WO2013098464A1 (en) * | 2011-12-30 | 2013-07-04 | Componenta Finland Oy | Piston for large sized internal combustion engine |
| BR112015005723A2 (pt) * | 2012-09-27 | 2017-07-04 | Ks Kolbenschmidt Gmbh | pistão construído em duas peças de uma máquina de combustão interna |
| CN103016191A (zh) * | 2012-11-23 | 2013-04-03 | 大连滨城活塞制造有限公司 | 活塞裙部形线结构 |
| KR101383121B1 (ko) | 2013-07-01 | 2014-04-09 | 삼영기계주식회사 | 피스톤 조립체 |
| US9211797B2 (en) | 2013-11-07 | 2015-12-15 | Achates Power, Inc. | Combustion chamber construction with dual mixing regions for opposed-piston engines |
| US9470136B2 (en) | 2014-03-06 | 2016-10-18 | Achates Power, Inc. | Piston cooling configurations utilizing lubricating oil from a bearing reservoir in an opposed-piston engine |
| US20160053712A1 (en) * | 2014-08-19 | 2016-02-25 | Deere & Company | Piston for Use in an Engine |
| US12510015B2 (en) | 2015-01-14 | 2025-12-30 | General Atomics Aeronautical Systems, Inc. | Piston bearing assembly for an opposed-piston engine |
| US9759119B2 (en) | 2015-01-14 | 2017-09-12 | Achates Power, Inc. | Piston cooling for opposed-piston engines |
| US9995213B2 (en) | 2015-03-31 | 2018-06-12 | Achates Power, Inc. | Asymmetrically-shaped combustion chamber for opposed-piston engines |
| US9840965B2 (en) | 2015-07-31 | 2017-12-12 | Achates Power, Inc. | Skewed combustion chamber for opposed-piston engines |
| WO2017054928A1 (de) * | 2015-10-01 | 2017-04-06 | Ks Kolbenschmidt Gmbh | Zweiteiliger kolben mit offenem kühlkanal |
| US10871125B2 (en) | 2015-11-02 | 2020-12-22 | Ks Kolbenschmidt Gmbh | Optimized hub support |
| US10294887B2 (en) | 2015-11-18 | 2019-05-21 | Tenneco Inc. | Piston providing for reduced heat loss using cooling media |
| US10119493B2 (en) | 2016-02-29 | 2018-11-06 | Achates Power, Inc. | Multi-layered piston crown for opposed-piston engines |
| US11162453B2 (en) | 2016-05-04 | 2021-11-02 | Ks Kolbenschmidt Gmbh | Piston |
| DE102016209816A1 (de) | 2016-06-03 | 2017-12-07 | Mahle International Gmbh | Zweiteiliger Kolben für eine Brennkraftmaschine |
| CN113431698B (zh) * | 2020-03-23 | 2023-04-11 | 强莉莉 | 一种分体复合式隔热活塞 |
| JP2023034846A (ja) * | 2021-08-31 | 2023-03-13 | マツダ株式会社 | エンジンのピストン構造 |
| JP2023034872A (ja) * | 2021-08-31 | 2023-03-13 | マツダ株式会社 | エンジンのピストン構造及びエンジンシステム |
| CN116412038A (zh) * | 2022-10-19 | 2023-07-11 | 中国船舶集团有限公司第七一一研究所 | 一种活塞顶、活塞裙部及组合活塞 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2046862A1 (de) * | 1970-09-23 | 1972-03-30 | Dr.Ing.H.C. F. Porsche Kg, 7000 Stuttgart | Oberflächenbeschichtung für einen aus einer Magnesiumlegierung bestehenden Kolben von Brennkraftmaschinen |
| FR2127040A5 (de) * | 1971-01-19 | 1972-10-13 | Semt | |
| DE2832970A1 (de) * | 1978-07-27 | 1980-02-07 | Schmidt Gmbh Karl | Gebauter, fluessigkeitsgekuehlter kolben fuer brennkraftmaschinen |
| DE3222582C2 (de) * | 1982-06-16 | 1985-10-03 | Berchem & Schaberg Gmbh, 4650 Gelsenkirchen | Verfahren zum Herstellen eines Kolbenbodenrohlings durch Schmieden für einen gebauten Kolben |
| DE3633134A1 (de) * | 1986-09-30 | 1988-04-07 | Man B & W Diesel Gmbh | Gebauter kolben fuer brennkraftmaschinen |
| US5029562A (en) * | 1989-12-05 | 1991-07-09 | Adiabatics, Inc. | Hybrid piston for high temperature engine |
| DE4029315A1 (de) * | 1990-09-15 | 1992-03-19 | Mahle Gmbh | Tauchkolben fuer verbrennungsmotoren |
| DE4429489A1 (de) * | 1994-08-19 | 1996-02-22 | Mahle Gmbh | Gebauter Kolben für Verbrennungsmotoren |
| DE19828545C1 (de) * | 1998-06-26 | 1999-08-12 | Cromotec Oberflaechentechnik G | Galvanisches Bad, Verfahren zur Erzeugung strukturierter Hartchromschichten und Verwendung |
| DE19833825C1 (de) * | 1998-07-28 | 1999-12-16 | Man B & W Diesel Ag | Kolben für eine Hubkolbenbrennkraftmaschine |
| US6182630B1 (en) * | 1998-11-23 | 2001-02-06 | Federal-Mogul World Wide, Inc. | Bolted articulated piston |
| DE102004027974A1 (de) * | 2004-06-08 | 2005-12-29 | Mahle Gmbh | Gebauter Kolben und Verfahren zur Vermeidung von Beschädigungen in Kontakt zueinander stehender Flächen des Oberteiles und des Unterteiles des Kolbens |
| DE102004030218A1 (de) | 2004-06-22 | 2006-01-19 | Mahle Gmbh | Gebauter Kolben für einen Verbrennungsmotor |
| DE102006015587A1 (de) | 2006-04-04 | 2007-10-11 | Mahle International Gmbh | Oberteil eines gebauten Kolbens |
-
2006
- 2006-11-23 DE DE102006055251A patent/DE102006055251A1/de not_active Withdrawn
-
2007
- 2007-10-23 KR KR1020097010284A patent/KR101394777B1/ko not_active Expired - Fee Related
- 2007-10-23 EP EP07817720A patent/EP2094961A2/de not_active Withdrawn
- 2007-10-23 CN CN2007900001120U patent/CN202039963U/zh not_active Expired - Lifetime
- 2007-10-23 WO PCT/DE2007/001886 patent/WO2008061486A2/de not_active Ceased
- 2007-10-23 US US12/312,742 patent/US8631736B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR101394777B1 (ko) | 2014-05-15 |
| EP2094961A2 (de) | 2009-09-02 |
| CN202039963U (zh) | 2011-11-16 |
| DE102006055251A1 (de) | 2008-05-29 |
| US8631736B2 (en) | 2014-01-21 |
| US20110041684A1 (en) | 2011-02-24 |
| KR20090089331A (ko) | 2009-08-21 |
| WO2008061486A3 (de) | 2011-03-03 |
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