WO2012152240A1 - Kolbenring für 2-taktmotoren - Google Patents
Kolbenring für 2-taktmotoren Download PDFInfo
- Publication number
- WO2012152240A1 WO2012152240A1 PCT/DE2012/000263 DE2012000263W WO2012152240A1 WO 2012152240 A1 WO2012152240 A1 WO 2012152240A1 DE 2012000263 W DE2012000263 W DE 2012000263W WO 2012152240 A1 WO2012152240 A1 WO 2012152240A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston ring
- piston
- vertex
- height
- ring system
- Prior art date
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
- F02F5/00—Piston rings, e.g. associated with piston crown
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/20—Rings with special cross-section; Oil-scraping rings
Definitions
- 2-stroke marine engines in contrast to 4-stroke engines have the problem that the oil supply for lubrication and thus to reduce wear on oil injection systems must be made. These systems must provide enough oil at a suitable time to ensure adequate lubrication of the cylinder surface / piston rings. This is uniform in all known systems that the oil supply must be made under the conditions of the gas back pressure. Considering that a modern ship motors with speeds of about 100 min "1 be operated at up to 2500 mm stroke, the time unit of the oil distribution is very difficult to design.
- No. 6,536,385 B1 discloses a piston ring which is provided with geometrically differently shaped profiles on the tread surface. This piston ring can be used in particular for the oil lubrication of 2-stroke machines.
- a piston-piston ring system superimposed piston rings are used, which have a crowned running surface, wherein the piston ring for receiving in a correspondingly formed Kolbenringnut, at least in Area of his, a combustion chamber facing flank surface is conical.
- DE 10 2006 058 081 A1 discloses a 2-stroke internal combustion engine, with at least one slit of gas control of an inlet and / or an outlet, wherein a gap between a reciprocating piston and a tread surrounding the reciprocating piston is sealed, wherein a combination seal for sealing the gap is arranged in the running surface, which slides along the reciprocating piston, such that the combination seal on the one hand has a gas sealing function and on the other an oil stripping function.
- the invention has for its object to provide a piston-piston ring system in which a more uniform distribution of oil over the entire running surface of the piston rings, seen in the circumferential direction, is generated, wherein the absolute amount of oil to be reduced.
- a piston ring system for a piston of a 2-stroke internal combustion engine with an inner diameter> 400 mm, with a spherical tread and a vertex of the crown and a standing in contact with a cylinder wall bearing portion consisting of a first piston ring and at least one second piston ring, wherein the first piston ring facing a combustion chamber and the second piston ring is disposed axially below the first piston ring, and wherein the apex of the crown of the first piston ring, measured from its lower edge surface, below the piston ring center and the apex of the second piston ring , measured from its lower flank surface, is arranged above the piston ring center.
- the functionality of the piston-piston ring system in particular with regard to the oil distribution in the circumferential direction, is optimized by a meaningful coordination of the physical conditions.
- both the pressure conditions and the operation of each piston rings are determined to each other to ensure the largest possible circumferential distribution of the oil per stroke.
- a piston-piston ring system which allows a reduction in the number of piston rings on a 2-, respectively a 3-ring system to achieve the necessary pressure gradients between the individual rings and thus in the respective annular groove for the hydrodynamic conditions on the running surface of the respective piston ring are necessary.
- An essential part of the invention is the interpretation of the pivot points and the crowns of all involved in the system piston rings.
- the pivot point of the tread crown of the first piston ring facing the combustion chamber is determined at about 1/3, starting from its lower flank surface, and the reductions below and above the pivot point designed so that the pressure gradient in front of and behind the ring a factor of 85%.
- the pivot point of the oil chamber facing the second piston ring is opposite to the first piston ring designed, ie, seen from the lower edge surface of the apex is approximately at a 2/3 height of the total height of the second piston ring.
- the amount of oil provided in the upstroke is hydrodynamically overflowed and the excess amount transported back into the ring system.
- the oil quantities are again transported, as far as not lost through the scavenging slots of the two-stroke engine, for the next stroke back into the ring system.
- the third piston ring is positioned axially between the first and second piston ring.
- the running surface of this third piston ring is likewise made spherical, the running surface contour of the third piston ring essentially corresponding to that of the second piston ring.
- FIG 1 schematic diagram of a piston-piston ring system according to the invention
- Figure 2 partial view of the combustion chamber facing piston ring of the system according to Figure 1;
- FIG 3 partial view of the oil chamber facing the piston ring of the system according to Figure 1;
- Figure 4 partial view of the illustrated in Figure 1 central piston ring.
- Figure 1 shows a schematic diagram of an inventive piston-piston ring system. Simplified shown is a piston 1, a selbigen surrounding cylinder 2, if necessary, designed as a cylinder liner.
- the piston 1 includes in this example a plurality of piston ring grooves 3,4,5. In the piston ring grooves 3,4,5 piston rings 6,7,8 are used. Essential for the subject invention, the piston rings 6 and 8.
- the interposed piston ring 7 is optional, so that when looking at the subject invention, initially only the piston rings 6 and 8 are considered.
- the piston rings 6,8 include upper and lower flank surfaces 6 ', 8' and lower flank surfaces 6 ", 8". Each of the two piston rings 6, 8 has an inner circumferential surface 9, 10 with a diameter of> 400 m.
- the piston-piston ring system according to the invention can be used in a two-stroke internal combustion engine, preferably in a marine diesel engine.
- the piston rings 6,8 each have a running surface 1 1, 12, which are in operative connection with a cylinder wall 2 'of the surrounding cylinder 2, respectively a bushing.
- the treads 1 1, 12 are provided with a spherical profile 13,14.
- the piston ring 6 facing a combustion chamber B is provided with a tread 13 of such spherical configuration that a vertex 15 (pivot point) is formed which, with respect to its lower flank surface 6 ", has an axial height h 'of approximately 1/3 the total axial height h of the piston ring 6.
- the piston ring 8 facing an oil chamber O is designed differently with regard to its crowned profile 14 relative to the piston ring 6.
- This piston ring 8 also contains a vertex 16 (pivot point) which, relative to its lower part Surface area 8 ", axially above the Piston ring center, preferably to 2/3 of the total height h of the piston ring 8, is arranged.
- the inventively chosen oppositely shaped tread ballast 13,14 of the piston rings 6 and 8 cause optimum oil distribution in the circumferential direction, both in the upward and in the downward movement of the piston. 1
- a further piston ring 7 which also has a convex tread pattern 17. Also, this piston ring 7 has an upper 7 'and a lower flank surface 7 "Depending on the application, the apex 18 of the crowning about half the axial height h'" of the piston ring 7, respectively axially below, respectively axially above half the axial height h " ⁇ always based on its total height h, be provided.
- Figure 2 shows the combustion chamber B (Figure 1) facing the piston ring 6, wherein the apex 15 of the crowned tread 13 is highlighted by the dashed line. Also visible are the inner circumferential surface 9, the upper flank surface 6 'and the lower flank surface 6 ".
- FIG. 3 shows the piston ring 8, the vertex 16 of the crowned profile 14 being also highlighted by the dashed line. Also visible are the inner peripheral surface 10, the upper flank surface 8 'and the lower flank surface 8 ".
- FIG. 4 shows the piston ring 7, which analogously to FIG. 1 likewise includes a convex tread profile 17 whose apex 18 is provided in this example approximately at half the axial height of this piston ring 7. Also recognizable are the inner peripheral surface, the upper flank surface T and the lower flank surface 7 ".
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020137029056A KR101941504B1 (ko) | 2011-05-10 | 2012-03-14 | 2행정 엔진용 피스톤 링 |
JP2014509603A JP6116548B2 (ja) | 2011-05-10 | 2012-03-14 | 2ストロークエンジン用のピストンリング |
CN201280022539.6A CN103620272B (zh) | 2011-05-10 | 2012-03-14 | 用于二冲程发动机的活塞环 |
EP12724550.4A EP2707627B1 (de) | 2011-05-10 | 2012-03-14 | Kolbenring für 2-taktmotoren |
US14/116,970 US9273629B2 (en) | 2011-05-10 | 2012-03-14 | Piston ring for two-stroke engines |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011101094 | 2011-05-10 | ||
DE102011101094.0 | 2011-05-10 | ||
DE102012000241.6A DE102012000241B4 (de) | 2011-05-10 | 2012-01-09 | Kolbenring für 2-Taktmotoren |
DE102012000241.6 | 2012-01-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2012152240A1 true WO2012152240A1 (de) | 2012-11-15 |
WO2012152240A4 WO2012152240A4 (de) | 2012-12-27 |
Family
ID=47070610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2012/000263 WO2012152240A1 (de) | 2011-05-10 | 2012-03-14 | Kolbenring für 2-taktmotoren |
Country Status (7)
Country | Link |
---|---|
US (1) | US9273629B2 (de) |
EP (1) | EP2707627B1 (de) |
JP (1) | JP6116548B2 (de) |
KR (1) | KR101941504B1 (de) |
CN (1) | CN103620272B (de) |
DE (1) | DE102012000241B4 (de) |
WO (1) | WO2012152240A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210332885A1 (en) * | 2018-08-13 | 2021-10-28 | Federal-Mogul Burscheid Gmbh | Three-part oil scraper ring |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103821630A (zh) * | 2013-11-15 | 2014-05-28 | 安庆帝伯格茨活塞环有限公司 | 一种带有凸起平台的锥面二道活塞气环 |
DE102014003149A1 (de) * | 2014-03-04 | 2015-09-10 | Federal-Mogul Burscheid Gmbh | Ölabstreifkolbenring und Verfahren zur Herstellung eines Ölabstreifkolbenrings |
WO2015199183A1 (ja) * | 2014-06-27 | 2015-12-30 | 株式会社リケン | ピストンリング |
DE102015111672A1 (de) * | 2015-07-17 | 2017-01-19 | Federal-Mogul Burscheid Gmbh | Kolbenring |
US10359112B2 (en) | 2016-03-28 | 2019-07-23 | Progress Rail Locomotive Inc. | Piston ring set for internal combustion engine and system and method thereof |
CN116324230B (zh) * | 2021-07-30 | 2024-02-13 | 帝伯爱尔株式会社 | 活塞环的组合以及活塞与活塞环的组合结构 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB233401A (en) * | 1924-02-04 | 1925-05-04 | Frank Herbert Boden | Improvements in packings for pistons and the like |
FR1064856A (fr) * | 1951-10-24 | 1954-05-18 | Maschf Augsburg Nuernberg Ag | Segment de piston |
DE3428007A1 (de) * | 1984-07-28 | 1986-02-06 | M.A.N.-B & W Diesel GmbH, 8900 Augsburg | Kolben mit spezieller formgebung und kolbenringbestueckung |
US6536385B1 (en) | 1999-03-17 | 2003-03-25 | Sanshin Kogyo Kabushiki Kaisha | Piston ring |
JP2007077988A (ja) * | 2005-09-13 | 2007-03-29 | Waertsilae Schweiz Ag | ピストンリング一式 |
DE102006058081A1 (de) | 2005-12-07 | 2007-08-30 | FEV Engine Technology, Inc., Auburn Hills | 2-Takt-Verbrennungskraftmaschine mit Ölabstreifring |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11182679A (ja) * | 1997-12-24 | 1999-07-06 | Sanshin Ind Co Ltd | 内燃エンジン |
RU2005121918A (ru) | 2003-03-03 | 2006-01-20 | Бандо Кико Ко., Лтд. (JP) | Поршневой двигатель |
DE10340312A1 (de) | 2003-09-02 | 2005-05-12 | Mahle Gmbh | Mehrteiliger Ölabstreifring für Kolben von Verbrennungsmotoren |
EP1762756A3 (de) * | 2005-09-13 | 2007-03-28 | Wärtsilä Schweiz AG | Kolbenringpackung |
JP2009091927A (ja) * | 2007-10-05 | 2009-04-30 | Mitsubishi Heavy Ind Ltd | 往復動機関のピストンリング |
-
2012
- 2012-01-09 DE DE102012000241.6A patent/DE102012000241B4/de not_active Expired - Fee Related
- 2012-03-14 CN CN201280022539.6A patent/CN103620272B/zh active Active
- 2012-03-14 US US14/116,970 patent/US9273629B2/en not_active Expired - Fee Related
- 2012-03-14 WO PCT/DE2012/000263 patent/WO2012152240A1/de active Application Filing
- 2012-03-14 EP EP12724550.4A patent/EP2707627B1/de active Active
- 2012-03-14 KR KR1020137029056A patent/KR101941504B1/ko active IP Right Grant
- 2012-03-14 JP JP2014509603A patent/JP6116548B2/ja active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB233401A (en) * | 1924-02-04 | 1925-05-04 | Frank Herbert Boden | Improvements in packings for pistons and the like |
FR1064856A (fr) * | 1951-10-24 | 1954-05-18 | Maschf Augsburg Nuernberg Ag | Segment de piston |
DE3428007A1 (de) * | 1984-07-28 | 1986-02-06 | M.A.N.-B & W Diesel GmbH, 8900 Augsburg | Kolben mit spezieller formgebung und kolbenringbestueckung |
US6536385B1 (en) | 1999-03-17 | 2003-03-25 | Sanshin Kogyo Kabushiki Kaisha | Piston ring |
JP2007077988A (ja) * | 2005-09-13 | 2007-03-29 | Waertsilae Schweiz Ag | ピストンリング一式 |
DE102006058081A1 (de) | 2005-12-07 | 2007-08-30 | FEV Engine Technology, Inc., Auburn Hills | 2-Takt-Verbrennungskraftmaschine mit Ölabstreifring |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210332885A1 (en) * | 2018-08-13 | 2021-10-28 | Federal-Mogul Burscheid Gmbh | Three-part oil scraper ring |
US11719340B2 (en) * | 2018-08-13 | 2023-08-08 | Federal-Mogul Burscheid Gmbh | Three-part oil scraper ring |
Also Published As
Publication number | Publication date |
---|---|
JP2014514516A (ja) | 2014-06-19 |
CN103620272B (zh) | 2016-01-13 |
DE102012000241A1 (de) | 2012-11-15 |
US20140076265A1 (en) | 2014-03-20 |
EP2707627B1 (de) | 2016-08-31 |
KR20140017637A (ko) | 2014-02-11 |
JP6116548B2 (ja) | 2017-04-19 |
KR101941504B1 (ko) | 2019-01-23 |
CN103620272A (zh) | 2014-03-05 |
WO2012152240A4 (de) | 2012-12-27 |
US9273629B2 (en) | 2016-03-01 |
DE102012000241B4 (de) | 2016-12-08 |
EP2707627A1 (de) | 2014-03-19 |
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