EP1965068A1 - Isolation d'entrefer sur une chemise de cylindre - Google Patents
Isolation d'entrefer sur une chemise de cylindre Download PDFInfo
- Publication number
- EP1965068A1 EP1965068A1 EP08151490A EP08151490A EP1965068A1 EP 1965068 A1 EP1965068 A1 EP 1965068A1 EP 08151490 A EP08151490 A EP 08151490A EP 08151490 A EP08151490 A EP 08151490A EP 1965068 A1 EP1965068 A1 EP 1965068A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder liner
- insert ring
- height
- air gap
- recess
- 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
Images
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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/16—Cylinder liners of wet type
Definitions
- the invention relates to a cylinder liner for an internal combustion engine, in particular for a gas engine, with a crankcase in which a crankshaft is rotatably mounted on which at least one connecting rod carrying a piston is articulated, wherein in the cylinder liner, a piston between a lower and a top dead center in an axial direction K is movable, wherein the cylinder liner has a cylinder liner collar through which the cylinder liner is inserted or fixed in a housing of the internal combustion engine, and wherein a cylinder head side recess is provided, in which an insert ring with a height h R is inserted.
- the insert ring is usually designed and arranged so that a top, recessed into the piston piston ring groove projects at the TDC position of the piston to the insert ring.
- Such a cylinder liner for an internal combustion engine is known from DE 1 900 922 B known.
- the teaching of this document is concerned with making available a piston-cylinder liner arrangement in which, despite the presence of an enlarged annular space between the piston and cylinder liner, an oil carbon coating which could contact the cylinder inner wall is avoided in precisely this clearance.
- This is achieved in that the inner wall of the cylinder liner has a diameter-reduced portion at its combustion chamber end.
- This section is going through one in the Cylinder liner recessed insert ring produced, wherein the insert ring is preferably made of the same material as the cylinder liner and is firmly inserted into the recess.
- a cylinder liner is described with a Zylinderbüchsenbund having a cylinder head side recess into which an insert ring is inserted.
- the insert ring is made of a thermally more stable material than the cylinder liner and serves to prevent deposits on the piston.
- a recess is provided within the outer wall, so that a direct heat flow is prevented by the insert ring to the frontal part of the cylinder liner. The insulating effect is ensured by a thus formed air gap or the use of ceramics.
- the invention has the object of developing such a cylinder liner in the form that the stability increases in the region of the combustion chamber end of the cylinder liner and sufficient insulation in this area is ensured.
- the cylinder liner collar has a height h B , which is between 65% and 100% or between 83% and 95% or 100% of the height h R of the insert ring.
- the cylinder liner collar is considerably higher and thus stiffer than is the case in the prior art.
- other strength-enhancing measures such as in the groove of the cylinder liner, can be dispensed with.
- an air gap insulation is provided between the insert ring and the cylinder liner, in which at least one defined with respect to the depth air gap is provided with a Gatician 1 L , wherein the ratio of the height h R of the insert ring to the total length 1 L between 1.2 and 1.9 or between 1.5 and 1.7.
- the higher temperatures occurring in the cylinder combustion chamber due to the insulation can be at least partially absorbed by an intensification of the cooling, in particular in the region of the cylinder head and other measures, for example by an adapted coordination of the combustion, so that, for example, with regard to exhaust emissions and fuel consumption Disadvantages arise.
- the total length l L of the air gap results when using several separate air gaps in the form of several wells as explained below from the sum of the heights h v of the depressions.
- the air gap is formed as a recessed into the outer circumference of the insert ring depression or as a recessed into the inner circumference of the recess recess.
- the circumferential recess results from appropriate material withdrawal.
- combined embodiments so for example in the outer periphery of the insert ring and the inner circumference of the recess recesses arranged, be provided, it being important to ensure that on the one hand a good insulation effect is achieved, on the other hand, the insert ring sufficiently stable and solid is held in the cylinder liner.
- the depression is arranged coaxially with the insert ring.
- a decentralized arrangement is also possible such that the depth of the depression varies over the circumference.
- the recess has a height h R and before and after the recess, a web is provided which limits the height h v of the recess.
- a web is provided which limits the height h v of the recess.
- the ratio of the height h v of the depression to the distance a is between 1 and 7 or between 3 and 6 or 4.5. According to the desired insulating effect on the one hand and the necessary rigidity of the insert ring on the other hand, the above ratio should be selected.
- the insert ring has a thickness d R and the recess has a depth t v , wherein the ratio of the thickness d R to the depth t v between 2 and 15 or between 7 and 13.
- the above ratio can be selected taking into consideration the rigidity of the insert ring on the one hand and the insulating effect on the other hand.
- the insulation by an additional insulating ring between the insert ring and the Cylinder liner be formed.
- an additional insulating ring for this purpose, for example, a ceramic material in question.
- the advantage of an additional ring is achieved in the additional support achieved by the insert ring in the cylinder liner by omitting the wells.
- the insert ring lies flat against the insulating ring and is supported against it.
- the cylinder liner is still further stiffened overall.
- Fig. 1 shows a sectional view of the combustion chamber end of a cylinder liner 1 a particular gas-powered internal combustion engine.
- the cylinder liner 1 has a Zylinderbüchsenbund 2, between a cylinder head 3 and a housing 4, in particular a crankcase of the internal combustion engine, is clamped.
- a cylinder head gasket 5 is provided between these components, which is arranged so that no tension of the cylinder liner collar 2 occurs.
- a water jacket 6 is arranged, which is charged with cooling water and extends below the Zylinderbüchsenbundes 2.
- a recess 7 is incorporated on the side facing the cylinder head 3, which extends from the cylinder head end of the cylinder liner 1 into a region below the housing-side end of the cylinder liner collar 2.
- an insert ring 8 is inserted, which is preferably made of the same material as the cylinder liner 1, for example, cast iron.
- the insert ring 8 has on its outer circumference on an air gap insulation, which are embedded in the embodiment in the form of three annular circumferential recesses 9 in the insert ring 8.
- the insert ring 8 preferably has an inner diameter which is slightly smaller than that of the cylinder liner 1 in the region below the recess 7.
- This board of the insert ring 8 causes both on the immersed in the insert ring 8 10th Landstill 10.1 piston adhering carbon and the oil adhering to the insert ring 8 is scraped off by an axial movement direction K of the piston 10.
- the immersion depth of the piston 10 in the insert ring 8 is designed so that an inserted into an upper piston ring groove 11 piston ring 12 at the top dead center (TDC position) of the piston 10 in the cylinder liner 1 just does not come into contact with the insert ring 8.
- the thickness of the insert ring 8 is preferably in the range of 10% to 15% of the total thickness of the cylinder liner collar 2 including the thickness of the recess 7.
- the rings of the insert ring 8 are larger by about 20% than the height of the cylinder liner collar second
- the embodiment according to Fig. 2 differs from the according to Fig. 1 in that recesses 9a embedded in the recess 7 of the cylinder liner 1, for example, are screwed.
- the depressions 9, 9 a have a depth t v in both embodiments, wherein the ratio of a thickness d R of the insert ring 8 to the depth t v is at least 5, ie the depth t v is up to 20% of the thickness d R of Insert ring 8 on.
- the three recesses 9, 9a are arranged at a distance a from each other and separated by two inner webs 14, 14a, wherein the two outer webs 14, 14a form the upper and lower axial end.
- the ratio of a height h v of the respective recess 9, 9a to the distance a is about 4.
- the air gap formed by the recesses 9, 9a has an overall length 1 L.
- the total length 1 L results according to Fig. 4 from a height h R of the insert ring 8 minus the total length of all the webs 14, 14 a, which corresponds to four times the distance a.
- the ratio of the height h R of the insert ring 8 to the total length 1 L is 1.33, ie the total length 1 L is 75% of the height h R of the insert ring. 8
- an additional insulating ring 13 is provided, which is arranged between the insert ring 8 and the cylinder liner collar 2.
- the insert ring 8 lies fully against the insulating ring 13 at.
- the insulating ring 13 is fully against the cylinder liner collar 2.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007007977A DE102007007977A1 (de) | 2007-02-17 | 2007-02-17 | Luftspaltisolation an einer Zylinderbüchse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1965068A1 true EP1965068A1 (fr) | 2008-09-03 |
EP1965068B1 EP1965068B1 (fr) | 2012-03-14 |
Family
ID=39420683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08151490A Not-in-force EP1965068B1 (fr) | 2007-02-17 | 2008-02-15 | Isolation d'entrefer sur une chemise de cylindre |
Country Status (5)
Country | Link |
---|---|
US (1) | US7726267B2 (fr) |
EP (1) | EP1965068B1 (fr) |
AT (1) | ATE549500T1 (fr) |
DE (1) | DE102007007977A1 (fr) |
ES (1) | ES2384192T3 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT519790A1 (de) * | 2017-04-13 | 2018-10-15 | Avl List Gmbh | Brennkraftmaschine |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9292020B2 (en) | 2009-05-11 | 2016-03-22 | Darrel R. Sand | Fail safe engine coolant thermostat |
US8413632B2 (en) * | 2009-06-04 | 2013-04-09 | Darrel Sand | Zero ridge cylinder bore |
EP2604835B1 (fr) * | 2011-12-16 | 2016-04-13 | Caterpillar Motoren GmbH & Co. KG | Revêtement de cylindre et tête de cylindre pour moteur à combustion interne |
US20160097340A1 (en) * | 2014-10-03 | 2016-04-07 | Caterpillar Inc. | Cylinder liner assembly having air gap insulation |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3038235A1 (de) | 1980-10-10 | 1982-05-06 | Mahle Gmbh, 7000 Stuttgart | Zylinder oder zylinderlaufbuchse fuer hubkolben-verbrennungsmotoren |
SU1390410A1 (ru) | 1986-01-07 | 1988-04-23 | Завод транспортного машиностроения им.В.И.Ленина | Цилиндропоршнева группа |
GB2204658A (en) * | 1987-05-16 | 1988-11-16 | Ae Plc | Cylinder liners |
WO2004022960A1 (fr) | 2002-09-05 | 2004-03-18 | Innogy Plc | Cylindre pour moteur a combustion interne |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2572392A (en) * | 1947-04-23 | 1951-10-23 | Caterpillar Tractor Co | Engine cooling, cylinder jacket, and head construction |
DE1234095B (de) | 1960-07-06 | 1967-02-09 | Sulzer Ag | Fluessigkeitsgekuehlte Zylinderlaufbuechse einer Kolbenbrennkraftmaschine |
GB968342A (en) | 1961-03-01 | 1964-09-02 | Ruston & Hornsby Ltd | Improvements in internal combustion engine cylinder heads |
US3489130A (en) | 1968-01-10 | 1970-01-13 | Sealed Power Corp | Piston and cylinder construction |
DE2752633A1 (de) * | 1977-11-25 | 1979-05-31 | Kloeckner Humboldt Deutz Ag | Zylinder fuer eine hubkolbenbrennkraftmaschine |
DE3236185A1 (de) * | 1982-09-30 | 1984-04-05 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Hubkolbenbrennkraftmaschine |
DE19917707C2 (de) * | 1999-04-20 | 2001-03-01 | Daimler Chrysler Ag | Brennkraftmaschine mit einem Kurbelgehäuse |
-
2007
- 2007-02-17 DE DE102007007977A patent/DE102007007977A1/de not_active Ceased
-
2008
- 2008-02-15 EP EP08151490A patent/EP1965068B1/fr not_active Not-in-force
- 2008-02-15 AT AT08151490T patent/ATE549500T1/de active
- 2008-02-15 US US12/070,241 patent/US7726267B2/en active Active
- 2008-02-15 ES ES08151490T patent/ES2384192T3/es active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3038235A1 (de) | 1980-10-10 | 1982-05-06 | Mahle Gmbh, 7000 Stuttgart | Zylinder oder zylinderlaufbuchse fuer hubkolben-verbrennungsmotoren |
SU1390410A1 (ru) | 1986-01-07 | 1988-04-23 | Завод транспортного машиностроения им.В.И.Ленина | Цилиндропоршнева группа |
GB2204658A (en) * | 1987-05-16 | 1988-11-16 | Ae Plc | Cylinder liners |
WO2004022960A1 (fr) | 2002-09-05 | 2004-03-18 | Innogy Plc | Cylindre pour moteur a combustion interne |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT519790A1 (de) * | 2017-04-13 | 2018-10-15 | Avl List Gmbh | Brennkraftmaschine |
AT519790B1 (de) * | 2017-04-13 | 2019-01-15 | Avl List Gmbh | Brennkraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
US7726267B2 (en) | 2010-06-01 |
ES2384192T3 (es) | 2012-07-02 |
DE102007007977A1 (de) | 2008-08-21 |
US20080196686A1 (en) | 2008-08-21 |
ATE549500T1 (de) | 2012-03-15 |
EP1965068B1 (fr) | 2012-03-14 |
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