SE537333C2 - Cylinder liner and internal combustion engine with such liner - Google Patents

Cylinder liner and internal combustion engine with such liner Download PDF

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Publication number
SE537333C2
SE537333C2 SE1350962A SE1350962A SE537333C2 SE 537333 C2 SE537333 C2 SE 537333C2 SE 1350962 A SE1350962 A SE 1350962A SE 1350962 A SE1350962 A SE 1350962A SE 537333 C2 SE537333 C2 SE 537333C2
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SE
Sweden
Prior art keywords
cylinder liner
ring
cylinder
internal combustion
combustion engine
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Application number
SE1350962A
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Swedish (sv)
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SE1350962A1 (en
Inventor
Jessica Elfsberg
Stig-Olof Carlén
Peter Eriksson
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Scania Cv Ab
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Publication date
Application filed by Scania Cv Ab filed Critical Scania Cv Ab
Priority to SE1350962A priority Critical patent/SE537333C2/en
Priority to DE112014003350.2T priority patent/DE112014003350B4/en
Priority to PCT/SE2014/050888 priority patent/WO2015026282A1/en
Publication of SE1350962A1 publication Critical patent/SE1350962A1/en
Publication of SE537333C2 publication Critical patent/SE537333C2/en

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • 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 
    • F02F1/004—Cylinder liners
    • 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 
    • F02F2001/006—Cylinders; Cylinder heads  having a ring at the inside of a liner or cylinder for preventing the deposit of carbon oil particles, e.g. oil scrapers
    • 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
    • F05C2251/00—Material properties
    • F05C2251/04—Thermal properties
    • F05C2251/048—Heat transfer

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

SAMMANDRAG Ett cylinderfoder definerar en forbranningskammare (6) i en cylinder hos en forbranningsmotor och uppvisar en metallisk kropp (8) med en inre, forbranningskammaren avgransande vagg (7), en runtomgaende invandig urtagning (13) i den inre vaggen samt en metallring (15) som är mottagen i urtagningen (13) och uppvisar en mot forbranningskammaren vand yta (16) utformad att sticka ut i forbranningskammaren (6) relativt namnda inre vagg (7) hos cylinderfodrets kropp. Metallringen (15) är fastlimmad i urtagningen mot cylinderfodrets kropp med ett lim (22) som har en varmekonduktivitet som är mindre an 50% av varmekonduktiviteten hos materialet hos cylinderfodrets kropp (8). SUMMARY A cylinder liner defines a combustion chamber (6) in a cylinder of an internal combustion engine and has a metallic body (8) with an inner rock (7) defining the combustion chamber, a circumferential inner recess (13) in the inner cradle and a metal ring (15). ) which is received in the recess (13) and has a surface (16) designed towards the combustion chamber to protrude into the combustion chamber (6) relative to said inner cradle (7) of the body of the cylinder liner. The metal ring (15) is glued in the recess against the body of the cylinder liner with an adhesive (22) which has a thermal conductivity which is less than 50% of the thermal conductivity of the material of the body of the cylinder liner (8).

Description

CYLINDERFODER OCH FORBRANNINGSMOTOR MED SADANT CYLINDERFODER UPPFINNINGENS TEKNISKA OMRADE Foreliggande uppfinning avser ett cylinderfoder utformat att definiera en forbranningskammare i en cylinder hos en forbranningsmotor, varvid cylinderfodret innefattar en metallisk kropp med en inre, forbranningskammaren av- gransande vagg, en runtomgaende invandig urtagning i denna inre vagg, varvid denna urtagning är belagen i omradet av en ande av cylinderfodrets kropp utformad att forbindas med ett cylinderlock och narmare denna ande an nagon kolvring hos en i forbrannings- kammaren mottagbar, framat ater rorlig kolv är avsedd att na, och en metallring som är mottagen i urtagningen och uppvisar en mot forbranningskammaren vand yta utformad att sticka ut i forbranningskammaren relativt namnda inre vagg hos cylinder- fodrets kropp, samt en forbranningsmotor enligt ingressen hos bifogade sjalvstandiga forbranningsmotorpatentkrav. BACKGROUND OF THE INVENTION TECHNICAL FIELD , this recess being coated in the region of a spirit of the body of the cylinder liner designed to be connected to a cylinder lid and closer to that spirit of a piston ring of a reciprocating piston receivable in the combustion chamber, and a metal ring received in the recess and has a surface facing the combustion chamber water designed to protrude into the combustion chamber relative to the said inner cradle of the body of the cylinder liner, and an internal combustion engine according to the preamble of the attached independent internal combustion engine patent claims.

Darvid är uppfinningen inte last till ett cylinderfoder for nagon specifik typ av forbranningsmotor eller bransle, och som nagra icke uttommande exempel pa branslen kan diesel och etanol namnas. Likasa avser uppfinningen cylinderfoder for forbranningsmotorer avsedda for alla typer av anvandning, sasom i industriella applikationer, i krossningsmaskiner och i allehanda ty- per av motorfordon, aven om uppfinningen är speciellt applicer- 1 bar pa hjulburna motorfordon, speciellt nyttofordon, sasom lastbilar och bussar, och av den anledningen nedan stundom kommer att diskuteras i den anvandningen i for uppfinningen belysande men saledes ingalunda begransande syfte. In this case, the invention is not a load for a cylinder liner for any specific type of internal combustion engine or fuel, and as some non-exhaustive examples of the fuel, diesel and ethanol may be mentioned. The invention also relates to cylinder liners for internal combustion engines intended for all types of use, such as in industrial applications, in crushing machines and in all types of motor vehicles, although the invention is particularly applicable to wheeled motor vehicles, especially commercial vehicles, such as trucks and buses, and for that reason below will sometimes be discussed in that use for the purpose of illustrating but thus by no means limiting.

BAKGRUNDSTEKNIK Ett cylinderfoder av inledningsvis definierat slag uppvisar en namnd metallring, vilken inom teknikomradet benamns saverring, for att koks som skapas pa den ovre delen av kolven, ovanfor den oversta kolvringen, vid forbranningen i forbranningskammaren ska skrapas loss fran kolven for att skydda ytan hos den inre vaggen hos cylinderfodrets kropp. BACKGROUND ART A cylinder liner of an initially defined type has a named metal ring, which in the art is called a saver ring, so that coke created on the upper part of the piston, above the top piston ring, during combustion in the combustion chamber is scraped off from the piston to protect the surface of the piston. the inner cradle of the body of the cylinder liner.

Cylinderfodrets kropp erhaller vid drift av forbranningsmotorn den ingar i en hog temperatur och den kyls normalt med kylvatska mellan denna och ett forbranningsmotorns cylindrar omgivande motorblock. Dock far denna kylvatska inte na upp till cylinderfodrets ande vid cylinderhuvudet, sa att dar cylinderfodret i det om- radet är i anliggning mot motorblocket och normalt en tatning i form av en runtomgaende 0-ring av elastiskt material är anordnad mellan cylinderfodret och motorblocket i det omradet. Detta innebar att cylinderfodret i detta omrade inte kan kylas ails eller endast i ringa grad av kylvatskan mellan cylinderfodret och mo- torblocket. During operation of the internal combustion engine, the body of the cylinder liner receives it at a high temperature and it is normally cooled with cooling liquid between it and the engine blocks surrounding the cylinders of an internal combustion engine. However, this coolant must not reach up to the spirit of the cylinder liner at the cylinder head, so that where the cylinder liner in that area is in contact with the engine block and normally a seal in the form of a circumferential O-ring of elastic material is arranged between the cylinder liner and the engine block in the the area. This meant that the cylinder liner in this area could not be cooled ails or only to a small extent by the cooling liquid between the cylinder liner and the engine block.

US 2013/0055993 Al visar ett cylinderfoder som i och for sig saknar namnda metalliska ring och av den inledningen inte är av det slag som definieras inledningsvis, men som uppvisar ett iso- lerande material, t ex ett keramiskt material, utvandigt i namnda 2 omrade avsett att vara anordnat narmast cylinderhuvudet hos en cylinder. Detta isolerande skikt kommer att innebara en minskad varmeoverforing fran cylinderfodrets kropp till ett omgivande motorblock i detta omrade, men det kommer inte att resultera i rib- gon lagre temperatur hos cylinderfodret i detta omrade, och det varmeisolerande materialet anges vara anordnat for att Oka motorns effektivitet. US 2013/0055993 A1 shows a cylinder liner which in itself lacks said metallic ring and of that preamble is not of the kind defined initially, but which has an insulating material, for example a ceramic material, externally in said 2 area intended to be arranged closest to the cylinder head of a cylinder. This insulating layer will involve a reduced heat transfer from the body of the cylinder liner to a surrounding engine block in this area, but it will not result in a slightly lower temperature of the cylinder liner in this area, and the heat insulating material is said to be provided to increase engine efficiency. .

Det finns naturligtvis en standig stravan att forbattra egenskap- erna hos ett cylinderfoder av inledningsvis definierat slag for att forbattra egenskaperna hos en darmed forsedd forbranningsmotor. There is, of course, a constant effort to improve the properties of a cylinder liner of the initially defined type in order to improve the properties of an internal combustion engine provided therewith.

SAMMANFATTNING AV UPPFINNINGEN Syftet med foreliggande uppfinning är att tillhandahalla ett cylinderfoder av inledningsvis definierat slag vilket är i atminstone nagot hanseende forbattrat relativt tidigare ' Detta syfte uppnas enligt uppfinningen genom att forse ett sadant cylinderfoder med de i den kannetecknande delen hos patentkravet 1 uppraknade sardragen. SUMMARY OF THE INVENTION The object of the present invention is to provide a cylinder liner of an initially defined type which is at least somewhat improved relative to the former.

Genom att limma fast metallringen mot cylinderfodrets kropp med ett lim med sadan lag varmekonduktivitet skapas en termisk barriar mellan metallringen och cylinderfodrets kropp. Detta innebar att cylinderfodrets kropp i detta omrade narmast namnda ande intill ett cylinderhuvud vid drift, d v s forbranning i forbrannings- kammaren, kommer att fa en lagre temperatur an yore fallet om 3 metallringen, sasom hos tidigare kand teknik, skulle ligga las i urtagningen mot cylinderfodrets kropp. Detta är speciellt viktigt eftersom cylinderfodrets kropp är svarare att kyla i detta omrade an langre ifran namnda ande, och den termiska barriaren kom- mer att resultera i en sankt temperatur dar normalt en namnd 0- ring är anordnad. Vid cylindrar med cylinderfoder av inledningsvis definierat slag maste sadana 0-ringar vara av en mycket dyr gummisort som tal de hoga temperaturer, upp till ca 150°C, for vilka 0-ringen utsatts. Andock maste sadana 0-ringar bytas ut efter en viss driftstid hos forbranningsmotorn. Genom det uppfin- ningsenliga anordnandet av limmet och darmed den termiska barriaren mellan metallringen och cylinderfodrets kropp kan dock en sadan temperaturminskning vid stallet far anordnandet av en namnd 0-ring uppnas att 0-ringen inte ails behover bytas ut, sa att bade kostnad for sjalva 0-ringen samt for servicestopp kan sparas. By gluing the metal ring to the body of the cylinder liner with an adhesive with such a layer of thermal conductivity, a thermal barrier is created between the metal ring and the body of the cylinder liner. This meant that the body of the cylinder liner in this area closest to the said spirit next to a cylinder head during operation, ie combustion in the combustion chamber, will have a lower temperature than in the case of the metal ring, as in prior art, would be read in the recess against the cylinder liner. body. This is especially important because the body of the cylinder liner is more responsive to cooling in this area farther from said spirit, and the thermal barrier will result in a low temperature where normally a named ring is arranged. In the case of cylinders with cylinder liners of an initially defined type, such O-rings must be of a very expensive type of rubber in terms of the high temperatures, up to about 150 ° C, to which the O-ring is exposed. However, such 0-rings must be replaced after a certain operating time of the internal combustion engine. However, by the inventive arrangement of the adhesive and thus the thermal barrier between the metal ring and the body of the cylinder liner, such a temperature reduction at the stable can be arranged that a named 0-ring is achieved so that the 0-ring does not need to be replaced. The 0-ring as well as for service stops can be saved.

En annan fordel med anordnandet av namnda lirn är att darigenom kommer den dada volymen mellan metallringen och cylin- derfodrets kropp att ersattas av lirn och darigenom inte bidra till producerande av emissioner av fororeningar vid forbranningen i forbranningskammaren. Saledes minskas den totala dada volymen i denna region av forbranningskammaren och darigenom kan nivan pa namnda emissioner sankas. Another advantage of the arrangement of said lirn is that thereby the dada volume between the metal ring and the body of the cylinder liner will be replaced by lirn and thereby not contribute to the production of emissions of pollutants during the combustion in the combustion chamber. Thus, the total dead volume in this region of the combustion chamber is reduced and thereby the level of said emissions can be reduced.

Enligt en utforingsform av uppfinningen har namnda lirn en varmekonduktivitet som är mindre an 10%, mindre an 5% eller mindre an 2% av varmekonduktiviteten hos materialet hos cylinderfodrets kropp. Genom att anvanda ett lirn med en sá lag var- mekonduktivitet uppnas en namnd termisk barriar med en "hag 4 hiijd" mellan metallringen och cylinderfodrets kropp och ovannamnda fordelar med en forekomst av en sadan barriar. Darvid har enligt en annan utforingsform av uppfinningen namnda urn en varmekonduktivitet som är mindre an 5 W/mK vid 20°C eller mindre an 2 W/mK vid 20°C. According to an embodiment of the invention, said line has a thermal conductivity which is less than 10%, less than 5% or less than 2% of the thermal conductivity of the material of the body of the cylinder liner. By using a line with such a low thermal conductivity, a so-called thermal barrier is obtained with a "hag 4 hiijd" between the metal ring and the body of the cylinder liner and the above-mentioned advantages of an occurrence of such a barrier. According to another embodiment of the invention, said urn has a thermal conductivity which is less than 5 W / mK at 20 ° C or less than 2 W / mK at 20 ° C.

Enligt en annan utforingsform av uppfinningen ar namnda urn ett keramiskt lim. Ett keramiskt urn har en i forhallande till den metalliska cylinderfoderkroppen mycket lag varmekonduktivitet och kommer darfor att utgora en onskad barriar mellan metallringen och cylinderfodrets kropp. According to another embodiment of the invention, said urn is a ceramic adhesive. A ceramic urn has a very low thermal conductivity in relation to the metallic cylinder liner body and will therefore constitute a desired barrier between the metal ring and the body of the cylinder liner.

Enligt en annan utforingsform av uppfinningen är metallringen fastlimmad mot cylinderfodrets kropp via ett limskikt med en tjocklek av 0,05-1 mm. En sadan tjocklek pa limskiktet är tillrack- lig for att astadkomma en onskad termisk barriar. According to another embodiment of the invention, the metal ring is glued to the body of the cylinder liner via an adhesive layer with a thickness of 0.05-1 mm. Such a thickness of the adhesive layer is sufficient to provide a desired thermal barrier.

Enligt en annan utforingsform av uppfinningen är som brukligt cylinderfodrets kropp gjord av gjutjarn. According to another embodiment of the invention, as usual, the body of the cylinder liner is made of cast iron.

Enligt en annan utforingsform av uppfinningen uppvisar cylinderfodrets kropp en runtomgaende utvandig sparartad urtagning i omradet av namnda ande utformad att mottaga en 0-ring av elastiskt material med en i obelastat tillstand storre tvarsnittsdiame- ter an djupet pa den sparartade urtagningen. Forekomsten av den termiska barriar som bildas genom limskiktet ar speciellt fordelaktig vid ett anordnande av en namnd 0-ring i ifragavarande omrade, da det leder till de hogre upp diskuterade fordelarna med en sankning av den temperatur for vilken 0-ringen utsatts. According to another embodiment of the invention, the body of the cylinder liner has a circumferential outer recessive recess in the region of said spirit designed to receive an O-ring of elastic material with an unloaded condition larger cross-sectional diameters than the depth of the recessed recess. The presence of the thermal barrier formed by the adhesive layer is particularly advantageous in arranging a named O-ring in the area in question, as it leads to the advantages discussed above with a decrease in the temperature to which the O-ring is exposed.

Uppfinningen tillhandahaller aven en forbranningsmotor, vilken är forsedd med sardragen hos den kannetecknande delen hos bifogade sjalvstandiga forbranningsmotorpatentkrav. Fordelarna med en sadan forbranningsmotor samt utforingsformer darav definie- rade i osjalvstandiga patentkrav framgar av diskussionen ovan kring det uppfinningsenliga cylinderfodret. The invention also provides an internal combustion engine, which is provided with the features of the jugging part of the appended independent internal combustion engine patent claims. The advantages of such an internal combustion engine and embodiments thereof defined in dependent claims appear from the discussion above regarding the cylinder liner according to the invention.

Uppfinningen avser aven ett motorfordon enligt patentkraven 12 och 13. The invention also relates to a motor vehicle according to claims 12 and 13.

Andra fordelaktiga sardrag hos samt fordelar med uppfinningen framgar av den nedan foljande beskrivningen. Other advantageous features and advantages of the invention will become apparent from the following description.

KORT BESKRIVNING AV RITNINGEN Har nedan beskrivs en sasom exempel anford utforingsform av uppfinningen under hanvisning till bifogade ritning, pa vilken: Fig 1är en delvis skuren vy av en del narmast cylinderhu- vudet av en cylinder has en forbranningsmotor forsedd med ett cylinderfoder enligt en utforingsform av uppfinningen. BRIEF DESCRIPTION OF THE DRAWINGS The following is an example of an embodiment of the invention with reference to the accompanying drawing, in which: Fig. the invention.

DETALJERAD BESKRIVNING AV EN UTFORINGSFORM AV 25 UPPFINNINGEN I Fig 1 visas i sektion en del av en cylinder 1 hos en forbranningsmotor 2, har hos ett motorfordon M, vilken cylinder är farsedd med ett cylinderfoder 3 enligt en utforingsform av uppfin- ningen. Narmare bestamt visas den del av cylindern som är bela- 6 gen i narheten av dess cylinderhuvud 4 som definierar en ande 5 hos en forbranningskammare 6 som avgransas av en inre vagg 7 hos en kropp 8 has cylinderfodret. DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION Fig. 1 shows in section a part of a cylinder 1 of an internal combustion engine 2, has in a motor vehicle M, which cylinder is fitted with a cylinder liner 3 according to an embodiment of the invention. More specifically, the part of the cylinder located near its cylinder head 4 which defines a spirit 5 of a combustion chamber 6 defined by an inner cradle 7 of a body 8 has the cylinder liner shown.

I forbranningskammaren är en kolv 9 mottagen att ram sig fram och ater, och kolven 9 anligger mot och styrs av namnda inre vagg 7 via kolvringar 10-12. In the combustion chamber, a piston 9 is received to frame back and forth, and the piston 9 abuts against and is guided by said inner cradle 7 via piston rings 10-12.

Cylinderfodrets kropp 8 uppvisar en runtomgaende invandig ur- tagning 13 i den inre vaggen 7 i omradet av en ande 14 av cylin- derfodret utformad att forbindas med cylinderlocket 4 och närmare denna ande an nagon kolvring, narmare bestamt den oversta kolvringen 12, är avsedd att na. En metallring 15, en s k saverring, är mottagen i urtagningen 13 och uppvisar en mot far- branningskammaren vand yta 16 utformad att sticka ut i forbran- ningskammaren relativt den inre vaggen 7 for att darigenom fran kolvens anddel 17 skrapa bort vid forbranningen bildad koks nar denna del av kolven passerar metallringen 15. The body 8 of the cylinder liner has a circumferential inner recess 13 in the inner cradle 7 in the region of a spirit 14 of the cylinder liner designed to be connected to the cylinder head 4 and closer to this spirit to any piston ring, more specifically the uppermost piston ring 12, is intended to na. A metal ring 15, a so-called saver ring, is received in the recess 13 and has a surface 16 which is water-resistant towards the combustion chamber and is designed to protrude into the combustion chamber relative to the inner rock 7 so as to scrape away coke formed from the piston portion 17 during combustion. this part of the piston passes the metal ring 15.

Cylinderfodret 3 omges av ett motorblock 18, och mellan cylin- derfodret och motorblocket finns ett utrymme 19, vilket i riktningen mot namnda ande 14 has cylinderfodret stracker sig fram till omradet av namnda ande och är utformat for ciruklation av kylvatska dari for kylning av cylinderfodret och darigenom aven motorblocket. The cylinder liner 3 is surrounded by an engine block 18, and between the cylinder liner and the engine block there is a space 19, which in the direction of said spirit 14 has the cylinder liner extending to the area of said spirit and is designed for circulating coolant therein for cooling the cylinder liner and thereby also the engine block.

Cylinderfodrets kropp 8 uppvisar en runtomgaende utvandig sparartad urtagning 20 anordnad i namnda omrade och i vilken en 0-ring 21 av elastiskt material, sasom gummi, speciellt fluor- gummi, an mottagen for att anligga mot cylinderblocket under 7 kompression och darigenom tata och hindra kylvatska i utrymmet 19 att na narmare anden 14 an fram till 0-ringen 21. The body 8 of the cylinder liner has a circumferential outer sparingly recess 20 arranged in said area and in which an O-ring 21 of elastic material, such as rubber, especially fluororubber, is received to abut against the cylinder block during compression and thereby absorb and prevent cooling fluid. in the space 19 to approach the spirit 14 up to the 0-ring 21.

Det som är speciellt med foreliggande uppfinning är att metall- ringen 15 är fastlimmad mot cylinderfodret med ett lim som har en lag varmekonduktivitet, sasom exempelvis i storleksordningen av mindre an 5% av varmekonduktiviteten hos cylinderfodrets material, som är gjutjarn. Detta lim bildar ett i figuren antytt limskikt 22 som exempelvis har en tjocklek av nagra tiondels mil- limeter, vilket kan jamforas med tjockleken hos den metalliska ringen, vilken kan vara exempelvis i storleksordningen 3-6 mm. Limskiktet är darvid med fordel bildat av ett keramiskt lim, sasom t.ex. det av foretaget Keranova AB under beteckningen K-1400 saluforda tvakomponentlimmet baserat pa metasilikat och finkor- nig aluminiumoxid. What is special about the present invention is that the metal ring 15 is glued to the cylinder liner with an adhesive having a low thermal conductivity, such as, for example, on the order of less than 5% of the thermal conductivity of the cylinder liner material, which is cast iron. This glue forms an adhesive layer 22 indicated in the figure which, for example, has a thickness of a few tenths of a millimeter, which can be compared with the thickness of the metallic ring, which can be, for example, in the order of 3-6 mm. The adhesive layer is then advantageously formed of a ceramic adhesive, such as e.g. Keranova AB, under the name K-1400, sells the two-component adhesive based on metasilicate and fine-grained alumina.

Limskiktet 22 fyller upp en del av och minskar darigenom den dada volymen hos cylinderns forbranningskammare, sa att nivan pa emissioner av fororeningar resulterande av forbranningen i forbranningskammaren sanks, men framfor alit bildar limskiktet en termisk barriar mellan den metalliska ringen 15 och cylinderfodrets kropp 8, sa att den senare kommer att ha en lagre temperatur vid platsen for mottagandet av 0-ringen 21 an vid franvaro av limskiktet. Detta kan innebara att 0-ringen 21, som kan vara av ett relativt dyrt material, sasom fluorgummi, far att tala de hoga temperaturerna, skulle kunna anvandas utan utbyte under hela farbranningsmotorns livstid och inte langre behova bytas efter en viss driftstid av forbranningsmotorn, sasom i fallet av att forbranningsmotorn ar inbyggd i ett motorfordon efter en viss korstracka vid service av motorfordonet. 8 Uppfinningen är givetvis inte pa nagot satt begransad till den ovan beskrivna utforingsformen, utan en mangd mojligheter till modifikationer darav torde vara uppenbara fOr en fackman pa omradet utan att denne fOr den skull avviker fran uppfinningens ram sadan denna definieras i bifogade patentkrav. 9 The adhesive layer 22 fills up a part of and thereby reduces the dead volume of the cylinder combustion chamber, so that the level of emissions of pollutants resulting from the combustion in the combustion chamber decreases, but above all the adhesive layer forms a thermal barrier between the metallic ring 15 and the cylinder liner 8, so that the latter will have a lower temperature at the place of reception of the O-ring 21 in the absence of the adhesive layer. This may mean that the O-ring 21, which may be of a relatively expensive material, such as fluorine rubber, can withstand the high temperatures, could be used without replacement during the entire life of the internal combustion engine and no longer need to be replaced after a certain operating time by the internal combustion engine. in the event that the internal combustion engine is built into a motor vehicle after a certain cross section when servicing the motor vehicle. The invention is of course not limited in any way to the embodiment described above, but a number of possibilities for modifications thereof should be obvious to a person skilled in the art without the latter deviating from the scope of the invention as defined in the appended claims. 9

Claims (13)

Patentkrav 1. Cylinderfoder utformat att definiera en forbranningskammare (6) i en cylinder hos en forbranningsmotor, varvid cylinderfodret innefattarA cylinder liner configured to define a combustion chamber (6) in a cylinder of an internal combustion engine, the cylinder liner comprising 1. en metallisk kropp (8) med en inre, forbranningskammaren avgransande vagg (7), 2. en runtomg6ende invandig urtagning (13) i denna inre vagg, varvid denna urtagning är belagen i omradet av en ande (14) av cylinderfodrets kropp utformad att forbindas med ett cylinderlock (4) och narmare denna ande an flagon kolvring (10-12) hos en i forbranningskammaren mottagbar, fram och ater rorlig kolv (9) är avsedd att na, och 3. en metallring (15) som är mottagen i urtagningen (13) och uppvisar en mot forbranningskammaren vand yta (16) utformad att sticka ut i forbranningskammaren (6) relativt namnda inre vagg (7) hos cylinderfodrets kropp, kannetecknat darav, att namnda metallring (15) är fastlimmad i urtagningen mot cylinderfodrets kropp med ett lim (22) som har en varmekonduktivitet som är mindre an 50% av varmekonduktiviteten hos materialet hos cylinderfodrets kropp (8).1. a metallic body (8) with an inner cradle (7) delimiting the combustion chamber, 2. a circumferential inner recess (13) in this inner cradle, this recess being covered in the region of a spirit (14) of the body of the cylinder liner formed to be connected to a cylinder head (4) and closer to this spirit to a flake piston ring (10-12) of a reciprocating piston (9) receivable in the combustion chamber is intended to reach, and 3. a metal ring (15) received in the recess (13) and has a surface (16) designed to protrude into the combustion chamber (6) relative to said inner cradle (7) of the body of the cylinder liner, characterized in that said metal ring (15) is glued in the recess to the cylinder liner. body with an adhesive (22) having a thermal conductivity less than 50% of the thermal conductivity of the material of the body of the cylinder liner (8). 2. Cylinderfoder enligt krav 1, kannetecknat darav, att namnda lirn har en varmekonduktivitet som är mindre an 10%, mindre an 5% eller mindre an 2% av varmekonduktiviteten hos materialet hos cylinderfodrets kropp.Cylinder liner according to claim 1, characterized in that said liner has a thermal conductivity of less than 10%, less than 5% or less than 2% of the thermal conductivity of the material of the body of the cylinder liner. 3. Cylinderfoder enligt krav 1 eller 2, kannetecknat darav, att namnda lim har en varmekonduktivitet som är mindre an 5 W/mK vid 20°C eller mindre an 2 W/mK vid 20°C.Cylinder liner according to claim 1 or 2, characterized in that said adhesive has a thermal conductivity of less than 5 W / mK at 20 ° C or less than 2 W / mK at 20 ° C. 4. Cylinderfoder enligt nagot av foregaende krav, kannetecknat darav, att namnda lim är ett keramiskt urn.Cylinder liner according to any one of the preceding claims, characterized in that said adhesive is a ceramic urn. 5. Cylinderfoder enligt nagot av foregaende krav, kannetecknat darav, att metallringen (15) är fastlimmad mot cylinderfodrets kropp (8) via ett limskikt (22) med en tjocklek av 0,05-1 mm.Cylinder liner according to one of the preceding claims, characterized in that the metal ring (15) is glued to the body (8) of the cylinder liner via an adhesive layer (22) with a thickness of 0.05-1 mm. 6. Cylinderfoder enligt nagot av fOregaende krav, kannetecknat darav, att cylinderfodrets kropp (8) är gjord av gjutjarn.Cylinder liner according to one of the preceding claims, characterized in that the body (8) of the cylinder liner is made of cast iron. 7. Cylinderfoder enligt nagot av foregaende krav, kannetecknat darav, att cylinderfodrets kropp uppvisar en runtomgaende utvandig sparartad urtagning (20) i omradet av namnda ande utformad att mottaga en 0-ring (21) av elastiskt material med en i obelastat tillstand storre tvarsnittsdiameter an djupet pa den sparartade urtagningen.Cylinder liner according to any one of the preceding claims, characterized in that the body of the cylinder liner has a circumferential outer recessed recess (20) in the region of said spirit designed to receive an O-ring (21) of elastic material with a larger cross-sectional diameter in the unloaded state. the depth of the saved recess. 8. Forbranningsmotor, kannetecknad darav, att den innefattar atminstone en cylinder (1) med ett cylinderfoder (3) enligt nagot av kraven 1-7.Internal combustion engine, characterized in that it comprises at least one cylinder (1) with a cylinder liner (3) according to any one of claims 1-7. 9. Forbranningsmotor enligt krav 8, kannetecknad darav, att den innefattar ett cylinderfodret (3) omgivande motorblock (18) som runtomgaende anligger mot cylinderfodrets kropp (8) i ett omrade intill namnda ande (14) av forbranningskammaren (6), ett utrymme (19) mellan cylinderfodret och motorblocket, 11 vilket i riktningen mot namnda ande stracker sig fram till namnda omrade och är utformat for cirkulation av kylvatska dari, och en 0-ring (21) av elastiskt material anordnad mellan cylinderfodret (3) och motorblocket (18) i namnda omrade for att tata och hindra kylvatska i namnda utrymme att na' narmare anden an fram till 0-ringen.Internal combustion engine according to claim 8, characterized in that it comprises an engine block (18) surrounding the cylinder liner (3) circumferentially abutting against the body of the cylinder liner (8) in an area adjacent to said spirit (14) of the combustion chamber (6), a space ( 19) between the cylinder liner and the engine block, 11 which in the direction of said spirit extends to said area and is designed for circulation of cooling water dari, and an O-ring (21) of elastic material arranged between the cylinder liner (3) and the engine block (18 ) in the said area to catch and prevent cooling water in the said space from reaching the spirit closer to the 0-ring. 10. Forbranningsmotor enligt krav 9, kannetecknad darav, att 0- ringen (21) an gjord av gummi.Internal combustion engine according to claim 9, characterized in that the O-ring (21) is made of rubber. 11. Forbranningsmotor enligt krav 10, kannetecknad darav, att 0-ringen (21) är gjord av fluorgummi.Internal combustion engine according to claim 10, characterized in that the O-ring (21) is made of fluorine rubber. 12. Motorfordon, kannetecknat darav, att det innefattar en forbranningsmotor (2) enligt nagot av kraven 8-11.Motor vehicle, characterized in that it comprises an internal combustion engine (2) according to any one of claims 8-11. 13. Motorfordon enligt krav 12, kannetecknat darav, att det är ett hjulburet motorfordon, sasom en lastbil eller buss. 12 1/1 pt /1 7I /3 / /Y7 22 6 friarN eAillik 41 / ANNINEw.i ii 1 x tr4 1 k hi ,••■■•■•••• •■•rt••m•Motor vehicle according to claim 12, characterized in that it is a wheeled motor vehicle, such as a truck or bus. 12 1/1 pt / 1 7I / 3 // Y7 22 6 friarN eAillik 41 / ANNINEw.i ii 1 x tr4 1 k hi, •• ■■ • ■ •••• • ■ • rt •• m •
SE1350962A 2013-08-21 2013-08-21 Cylinder liner and internal combustion engine with such liner SE537333C2 (en)

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DE112014003350.2T DE112014003350B4 (en) 2013-08-21 2014-07-11 Cylinder liner and engine with such a cylinder liner
PCT/SE2014/050888 WO2015026282A1 (en) 2013-08-21 2014-07-11 Cylinder lining and engine with such cylinder lining

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GB2546313A (en) * 2016-01-15 2017-07-19 Caterpillar Energy Solutions Gmbh Turbulators for an internal combustion engine

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JPS6030451A (en) * 1983-07-29 1985-02-16 Hino Motors Ltd Heat insulating device for engine
JPS61142320A (en) * 1984-12-15 1986-06-30 Mitsubishi Heavy Ind Ltd Combustion chamber of diesel engine
DE19703530C1 (en) * 1997-01-31 1998-10-08 Mtu Friedrichshafen Gmbh Cast-iron type cylinder runner sleeve with carbon oil-scraper ring esp for diesel combustion engine
ES2215269T3 (en) * 1998-02-05 2004-10-01 GE JENBACHER GMBH & CO. OHG COMBUSTION ENGINE, ESPECIALLY A STATIONARY GAS ENGINE.
AT504392A1 (en) * 2006-10-25 2008-05-15 Ge Jenbacher Gmbh & Co Ohg ZYLINDERKOPFDICHTUNG
US20090071434A1 (en) * 2007-09-19 2009-03-19 Macmillan Shaun T Low heat rejection high efficiency internal combustion engine
FI124135B (en) * 2010-06-08 2014-03-31 Wärtsilä Finland Oy PISTON ENGINE CYLINDER SOCKET
WO2012129339A2 (en) * 2011-03-21 2012-09-27 Cummins Intellectual Property, Inc. Internal combustion engine having improved cooling arrangement
EP2753726A1 (en) * 2011-09-07 2014-07-16 Federal-Mogul Corporation Cylinder liner with a thermal barrier coating
DE202012002772U1 (en) * 2012-03-15 2012-04-04 Wärtsilä Switzerland Ltd. Insert for a cylinder of an internal combustion engine
DE102012013379A1 (en) * 2012-07-04 2014-01-09 Mtu Friedrichshafen Gmbh Insert and internal combustion engine with insert

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