EP1965068B1 - Isolation d'entrefer sur une chemise de cylindre - Google Patents

Isolation d'entrefer sur une chemise de cylindre Download PDF

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Publication number
EP1965068B1
EP1965068B1 EP08151490A EP08151490A EP1965068B1 EP 1965068 B1 EP1965068 B1 EP 1965068B1 EP 08151490 A EP08151490 A EP 08151490A EP 08151490 A EP08151490 A EP 08151490A EP 1965068 B1 EP1965068 B1 EP 1965068B1
Authority
EP
European Patent Office
Prior art keywords
cylinder liner
height
air gap
insert ring
ring
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.)
Not-in-force
Application number
EP08151490A
Other languages
German (de)
English (en)
Other versions
EP1965068A1 (fr
Inventor
Diethard Plohberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Energy Solutions GmbH
Original Assignee
MWM GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MWM GmbH filed Critical MWM GmbH
Publication of EP1965068A1 publication Critical patent/EP1965068A1/fr
Application granted granted Critical
Publication of EP1965068B1 publication Critical patent/EP1965068B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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.
  • a cylinder liner with a cylinder liner collar and an insert ring is shown.
  • the insert ring is insulated by an insulating ring.
  • 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 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 or an insulating ring is provided between the insert ring and the cylinder liner.
  • at least one depth gap defined air gap with a Gatician 1 L is provided in the air gap insulation, wherein the ratio of the height h R of the insert ring to the total length 1 L between 1.1 and 1.9 or between 1.3 and Is 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 recess 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 v 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 can by an insulating ring between the insert ring and the Cylinder liner be formed.
  • an insulating ring between the insert ring and the Cylinder liner be formed.
  • a ceramic material in question for example, a ceramic material in question.
  • 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.

Claims (10)

  1. Chemise de cylindre (1) pour un moteur à combustion interne dans laquelle un piston (10) est déplaçable entre un point mort bas et un point mort haut dans une direction axiale K et laquelle présente une collerette de chemise de cylindre (2) par laquelle la chemise de cylindre (1) est fixable dans un boîtier (4) du moteur à combustion interne, un évidement (7) du côté de la culasse étant prévu, dans lequel un anneau d'insertion (8) avec une hauteur hR est inséré, et une isolation par intervalle d'air étant prévue entre l'anneau d'insertion (8) et la chemise de cylindre (1),
    caractérisée en ce que
    la collerette de chemise de cylindre (2) présente une hauteur hB, laquelle fait entre 83 % et 95 % ou 100 % de la hauteur hR de l'anneau d'insertion (8).
  2. Chemise de cylindre (1) selon la revendication 1,
    caractérisée en ce que,
    pour l'isolation par intervalle d'air, au moins un intervalle d'air (9, 9a) défini avec une longueur totale lL est prévu, le rapport de la hauteur hR de l'anneau d'insertion (8) avec la longueur totale lL étant entre 1,1 et 1,9 ou entre 1,3 et 1,7.
  3. Chemise de cylindre (1) selon la revendication 2,
    caractérisée en ce que
    l'intervalle d'air (9, 9a) est formé comme une cavité (9) pratiquée dans la périphérie extérieure de l'anneau d'insertion (8).
  4. Chemise de cylindre (1) selon la revendication 2 ou 3,
    caractérisée en ce que
    l'intervalle d'air (9, 9a) est formé comme une cavité (9a) pratiquée dans la périphérie inférieure de l'évidement (7).
  5. Chemise de cylindre (1) selon la revendication 3 ou 4,
    caractérisée en ce que
    trois cavités (9, 9a) ou plus sont prévues, lesquelles sont disposées l'une au-dessus de l'autre et avec un écart a entre elles, dans la direction de mouvement K.
  6. Chemise de cylindre (1) selon la revendication 3, 4 ou 5,
    caractérisée en ce que,
    relativement à la direction du mouvement axiale K, la cavité (9, 9a) présente une hauteur hv et en ce que, avant et après la cavité (9, 9a), un talon (14, 14a) est prévu, lequel limite la hauteur hv de la cavité (9, 9a), l'anneau d'insertion (8) étant appuyé contre la collerette de chemise de cylindre (2) par le talon (14, 14a).
  7. Chemise de cylindre (1) selon la revendication 5 ou 6, dans la mesure où celle-ci dépend de la revendication 5,
    caractérisée en ce que
    le rapport de la hauteur hv de la cavité (9, 9a) avec l'écart a est entre 1 et 7 ou entre 3 et 6 ou 4,5.
  8. Chemise de cylindre (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    l'anneau d'insertion (8) présente une épaisseur dR et la cavité (9, 9a) présente une profondeur tv, le rapport de l'épaisseur dR avec la profondeur tv étant entre 3 et 15 ou entre 7 et 13.
  9. Chemise de cylindre (1) pour un moteur à combustion interne dans laquelle un piston (10) est déplaçable entre un point mort bas et un point mort haut dans une direction axiale K et laquelle présente une collerette de chemise de cylindre (2) par laquelle la chemise de cylindre (1) est fixable dans un boîtier (4) du moteur à combustion interne, un évidement (7) du côté de la culasse étant prévu, dans lequel un anneau d'insertion (8) avec une hauteur hR est inséré, et un anneau isolant (13) supplémentaire étant prévu entre l'anneau d'insertion (8) et la chemise de cylindre (1),
    caractérisée en ce que
    la collerette de chemise de cylindre (2) présente une hauteur hB, laquelle fait entre 83 % et 95 % ou 100 % de la hauteur hR de l'anneau d'insertion (8).
  10. Moteur à combustion interne avec une chemise de cylindre (1) selon l'une des revendications précédentes.
EP08151490A 2007-02-17 2008-02-15 Isolation d'entrefer sur une chemise de cylindre Not-in-force EP1965068B1 (fr)

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 EP1965068A1 (fr) 2008-09-03
EP1965068B1 true 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)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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
AT519790B1 (de) * 2017-04-13 2019-01-15 Avl List Gmbh Brennkraftmaschine

Family Cites Families (11)

* Cited by examiner, † Cited by third party
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
DE3038235C2 (de) 1980-10-10 1983-12-22 Mahle Gmbh, 7000 Stuttgart Zylinder oder Zylinderlaufbuchse für Hubkolben-Verbrennungsmotoren
DE3236185A1 (de) 1982-09-30 1984-04-05 Klöckner-Humboldt-Deutz AG, 5000 Köln Hubkolbenbrennkraftmaschine
SU1390410A1 (ru) 1986-01-07 1988-04-23 Завод транспортного машиностроения им.В.И.Ленина Цилиндропоршнева группа
GB8711605D0 (en) 1987-05-16 1987-06-24 Ae Plc Cylinder liners
DE19917707C2 (de) * 1999-04-20 2001-03-01 Daimler Chrysler Ag Brennkraftmaschine mit einem Kurbelgehäuse
GB0220685D0 (en) * 2002-09-05 2002-10-16 Innogy Plc A cylinder for an internal combustion engine

Also Published As

Publication number Publication date
EP1965068A1 (fr) 2008-09-03
US7726267B2 (en) 2010-06-01
US20080196686A1 (en) 2008-08-21
ATE549500T1 (de) 2012-03-15
ES2384192T3 (es) 2012-07-02
DE102007007977A1 (de) 2008-08-21

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