EP1391603A1 - Chemise-cylindre pour un moteur à combustion interne , le procédé de production et moteur avec cette chemise - Google Patents

Chemise-cylindre pour un moteur à combustion interne , le procédé de production et moteur avec cette chemise Download PDF

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Publication number
EP1391603A1
EP1391603A1 EP03017194A EP03017194A EP1391603A1 EP 1391603 A1 EP1391603 A1 EP 1391603A1 EP 03017194 A EP03017194 A EP 03017194A EP 03017194 A EP03017194 A EP 03017194A EP 1391603 A1 EP1391603 A1 EP 1391603A1
Authority
EP
European Patent Office
Prior art keywords
collar
cylinder
side wall
liner
engine
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
Application number
EP03017194A
Other languages
German (de)
English (en)
Other versions
EP1391603B1 (fr
Inventor
Giancarlo Dellora
Rudolf Ellensohn
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.)
FPT Motorenforschung AG
Iveco SpA
Original Assignee
Iveco Motorenforschung AG
Iveco Fiat SpA
Iveco SpA
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 Iveco Motorenforschung AG, Iveco Fiat SpA, Iveco SpA filed Critical Iveco Motorenforschung AG
Publication of EP1391603A1 publication Critical patent/EP1391603A1/fr
Application granted granted Critical
Publication of EP1391603B1 publication Critical patent/EP1391603B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/004—Cylinder liners

Definitions

  • the present invention relates to a cylinder liner for an internal-combustion engine, to a method for producing said liner and to an engine comprising such a liner.
  • Internal-combustion engines comprise an engine block made of cast iron or an aluminium alloy formed by casting and defining a plurality of cylinders, and a cylinder head which is mounted fluidtightly on the engine block with the interposition of a gasket.
  • the cylinders are lined internally with respective sleeves or liners which are made from a material (generally special high-alloy cast iron) designed to resist the mechanical, thermal and chemical stresses to which they are subjected by the gases resulting from combustion; the liners have to undergo high precision machining operations so as to guide properly the reciprocating motion of the associated piston.
  • a material generally special high-alloy cast iron
  • the liners are normally provided with an upper outer collar which is designed to be accommodated in an annular recess of the engine block surrounding the respective cylinder and to co-operate with the head gasket so as to provide a seal for the combustion gases.
  • the known liners are produced in one piece, firstly by forming a blank by casting and then machining this blank with machine tools so as to remove any swarf. Generally, a centrifugal casting process is used with a view to obtaining the desired metallurgical properties of the material.
  • the known liners have a certain number of disadvantages.
  • the known production processes involve the use of a cast material which can be easily machined; therefore, for technological reasons, it is not possible to use materials, in particular certain steels, which possess optimum mechanical strength properties.
  • the liners have to have a relatively large wall thickness, thereby reducing the effective cylinder capacity which can be obtained from a predetermined radial dimension of the cylinder.
  • a liner for a cylinder of an internal-combustion engine comprising a cylindrical side wall and at least one collar adapted to be accommodated in a seating of said engine coaxial to said cylinder, characterised in that said side wall is formed by a cylindrical tube and in that said collar is formed by an annular body separate from said side wall and rigidly connected thereto.
  • the present invention also relates to a method of producing a cylinder liner for an internal-combustion engine, said liner comprising a cylindrical side wall and at least one collar adapted to be accommodated in a seating of said engine coaxial to said cylinder, the method being characterised by comprising the stages of producing said side wall in the form of a cylindrical tube, producing said collar in the form of an annular body separate from said side wall and connecting said collar and said side wall rigidly together.
  • the reference numeral 5 generally denotes an internal-combustion engine comprising an engine block 6 provided with a plurality of cylinders 7, only one of which is partly illustrated.
  • the engine 5 further comprises a cylinder head 12, partly illustrated, which is adapted to be fastened to the engine block 6 by means of screws (not shown); the cylinder head 12 defines the combustion chambers (not shown for simplicity) and accommodates in known manner the inlet and exhaust valves of the cylinders, which are also not shown.
  • the cylinder head 12 is bounded at the bottom by a lower flat surface 13 adapted to be connected with a corresponding upper flat surface 14 of the engine block 6.
  • the cylinder 7 is lined internally with a liner 8.
  • the liner 8 comprises a cylindrical side wall 9 and a collar 10 which is externally fastened to an upper end of the side wall 9.
  • the collar 10 is accommodated in an annular seating 17 of the engine block 6, which is coaxial to the cylinder 7 and which is defined by a recess in the upper surface 14 surrounding the cylinder 7, and it abuts against a shoulder 18 downwardly delimiting the seating 17.
  • the side wall 9 is formed by a cylindrical tube and the collar 10 is formed by an annular body separate from the side wall 9 and rigidly connected thereto.
  • the side wall 9 is preferably made of a high strength steel; in this way the thickness of the side wall 9 can be kept to a minimum.
  • the side wall 9 has an outer cylindrical surface 18a and an inner surface 19.
  • the collar 10 is bounded externally by a lateral surface 20 and axially by a lower surface 21 co-operating with a shoulder 18, and by an upper free surface 22.
  • connection between the collar 10 and the wall 9 can be effected using any known technique.
  • the connection is effected by welding; two welds 15 are shown in the drawings along the lines of contact of the outer surface 18a of the side wall 9 respectively with the surface 21 and with the free surface 22 of the collar 10.
  • the connection can be effected using any other known technique, for example by means of an interference fit and/or with an adhesive.
  • the collar 10 defines integrally an elastic annular element 16 adapted to be deformed elastically when the cylinder head 12 is installed on the engine block 6 and to co-operate fluidtightly with the lower surface 13 of the cylinder head 12 as a result of the elastic reaction caused by this deformation. In this way, it is possible to eliminate the head gasket.
  • the element 16 is formed by a deformable upper outer portion of the collar 10 bounded at the bottom by an annular groove 23 provided in the lateral surface 20 of the collar 10 and which separates from a lower portion 24 of the substantially rigid collar 10 co-operating with the shoulder 18 of the engine block 6.
  • a second groove 25 provided in the free surface 22 of the collar 10 delimits radially inwards the annular elastic element 16 so as to form with the groove 23 a preferential deflection zone 26 and thus reduce the stress caused by the installation of the cylinder head 12 on the connection between the collar 10 and the side wall 9 of the liner 8.
  • the groove 25 divides the free surface 22 of the collar 10 into an inner portion 22a adjacent the side wall 9 and into an outer portion 22b upwardly delimiting the elastic element 16.
  • the elastic element 16 projects upwards by an amount h with respect to the upper flat surface 14 of the engine block 6 when the cylinder head 12 is detached from the engine block 6 as in Figure 1, and the elastic element 16 is in an undeformed condition.
  • the outer portion 22b of the free surface 22 of the collar, which upwardly delimits the elastic element 16, is formed with a slight countersinking so as to exhibit, in section, a profile increasing from the inside (where it is substantially level with the upper surface 14 of the engine block 6) to the outside, where it projects with respect to the surface 14.
  • the portion 22b of the free surface 22 is disposed level with the surface 14 of the engine block 6 following the elastic deformation caused by the fastening of the cylinder head 12 on the engine block 6, as indicated in Figure 2.
  • the elastic element 16 exerts against the flat surface 13 of the cylinder head 12 an elastic force so as to ensure a perfect gas-tight seal of the liner 8 of the cylinder 7, at the maximum pressure provided for the operation of the engine 5.
  • the method for producing the liner 8 comprises the following stages:
  • the advantages of the cylinder liner 8 according to the invention with respect to the state of the art are evident. Firstly, the casting of the blank for the liner 8 is eliminated and the machining of the components by means of machine tools is simplified. Additionally, it is possible for the liner 8 and, in particular, the side wall 9 to be made of a high strength material, such as steel, the use of which and the machining of which by means of machine tools were inconceivable for a one-piece liner.
  • this high-strength material makes it possible to produce the side wall 9 with reduced thickness and, therefore, to design engines with smaller dimensions for the same cylinder capacity or with increased cylinder capacity for the same dimensions with respect to the state of the art.
  • the cylinder liner described can be subject to modifications and improvements without departing from the scope of the claims.
  • the collar 10 can be arranged at a certain distance from the edge of the side wall.
  • the collar 10 can be of different section to that described, for example rectangular, inverted L-shape, T-shaped, etc.
  • the shoulder 21 may also be carried by a second collar which is separate from that of the elastic element 16.
  • the cylinder liner 8 described can be applied to the cylinders of various types of internal-combustion engine, diesel or controlled ignition, including air-cooled engines and two-stroke engines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Closures For Containers (AREA)
EP03017194A 2002-08-23 2003-07-29 Chemise-cylindre pour un moteur à combustion interne , le procédé de production et moteur avec cette chemise Expired - Lifetime EP1391603B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000749A ITTO20020749A1 (it) 2002-08-23 2002-08-23 Canna di rivestimento di un cilindro di un motore a
ITTO20020749 2002-08-23

Publications (2)

Publication Number Publication Date
EP1391603A1 true EP1391603A1 (fr) 2004-02-25
EP1391603B1 EP1391603B1 (fr) 2008-08-13

Family

ID=11459590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03017194A Expired - Lifetime EP1391603B1 (fr) 2002-08-23 2003-07-29 Chemise-cylindre pour un moteur à combustion interne , le procédé de production et moteur avec cette chemise

Country Status (5)

Country Link
EP (1) EP1391603B1 (fr)
AT (1) ATE404786T1 (fr)
DE (1) DE60322801D1 (fr)
ES (1) ES2311661T3 (fr)
IT (1) ITTO20020749A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016048803A1 (fr) * 2014-09-22 2016-03-31 Caterpillar Inc. Chemise de cylindre comprenant une bride avec une rainure annulaire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB711934A (en) * 1952-05-06 1954-07-14 Res Engineering Corp Improvements in or relating to cylinders for internal combustion engines
DE2442352A1 (de) * 1974-09-04 1976-03-18 Daimler Benz Ag Zylinderlaufbuechse in einem zylinderblock einer brennkraftmaschine
JPS6094230A (ja) * 1983-10-31 1985-05-27 Toyota Motor Corp シリンダブロツクの製造方法
DE3530411A1 (de) * 1985-08-26 1987-02-26 Kloeckner Humboldt Deutz Ag Zylinderlaufbuchse fuer eine brennkraftmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB711934A (en) * 1952-05-06 1954-07-14 Res Engineering Corp Improvements in or relating to cylinders for internal combustion engines
DE2442352A1 (de) * 1974-09-04 1976-03-18 Daimler Benz Ag Zylinderlaufbuechse in einem zylinderblock einer brennkraftmaschine
JPS6094230A (ja) * 1983-10-31 1985-05-27 Toyota Motor Corp シリンダブロツクの製造方法
DE3530411A1 (de) * 1985-08-26 1987-02-26 Kloeckner Humboldt Deutz Ag Zylinderlaufbuchse fuer eine brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 238 (M - 416) 25 September 1985 (1985-09-25) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016048803A1 (fr) * 2014-09-22 2016-03-31 Caterpillar Inc. Chemise de cylindre comprenant une bride avec une rainure annulaire

Also Published As

Publication number Publication date
DE60322801D1 (de) 2008-09-25
ITTO20020749A1 (it) 2004-02-24
ES2311661T3 (es) 2009-02-16
EP1391603B1 (fr) 2008-08-13
ATE404786T1 (de) 2008-08-15
ITTO20020749A0 (it) 2002-08-23

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