GB2575036A - Fire ring for an internal combustion engine - Google Patents

Fire ring for an internal combustion engine Download PDF

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Publication number
GB2575036A
GB2575036A GB201810367A GB201810367A GB2575036A GB 2575036 A GB2575036 A GB 2575036A GB 201810367 A GB201810367 A GB 201810367A GB 201810367 A GB201810367 A GB 201810367A GB 2575036 A GB2575036 A GB 2575036A
Authority
GB
United Kingdom
Prior art keywords
fire ring
cylinder
circumferential surface
internal combustion
combustion 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.)
Withdrawn
Application number
GB201810367A
Other versions
GB201810367D0 (en
Inventor
Palmer Koci Chad
Jack Fischer Tony
Delvecchio Kerry
Donald Wiebrecht Eric
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 Inc
Original Assignee
Caterpillar Inc
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 Caterpillar Inc filed Critical Caterpillar Inc
Priority to GB201810367A priority Critical patent/GB2575036A/en
Publication of GB201810367D0 publication Critical patent/GB201810367D0/en
Publication of GB2575036A publication Critical patent/GB2575036A/en
Withdrawn legal-status Critical Current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
    • F02F11/00—Arrangements of sealings in combustion engines 
    • F02F11/002—Arrangements of sealings in combustion engines  involving cylinder heads
    • 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
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • F16J15/0887—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing the sealing effect being obtained by elastic deformation of the packing
    • 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
    • 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
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • 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
    • 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 
    • F02F1/24—Cylinder heads
    • F02F2001/249—Cylinder heads with flame plate, e.g. insert in the cylinder head used as a thermal insulation between cylinder head and combustion chamber

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

A fire ring 140 to be disposed between the cylinder (102, fig.1) and the cylinder head (104) of an internal combustion engine is non-circular, the distance R1a, R1b, R1c of the inner circumferential surface 148 from the center axis X-X’ and/or the distance R2x, R2y, R2z of the outer circumferential surface 150 from the center axis X-X’ varying in a circumferential direction as a function of one or more engine parameters, eg the number or arrangement of cooling passages 116, and/or the number or arrangement of fastening members 118. The height (thickness) H of the fire ring may also vary circumferentially. The fire ring may be integrally formed or coupled with the head gasket 170, or may be received in an annular slot 126 in the cylinder liner 102. The fire ring may be flat or wavy. The cross-section of the ring may be rectangular, elliptical or quadrilateral.

Description

Description
FIRE RING FOR AN INTERNAL COMBUSTION ENGINE
Technical Field [0001] The present disclosure relates to a fire ring for an internal combustion engine. More particularly, the present disclosure relates to a non-circular fire ring for an internal combustion engine.
Background [0002] Internal combustion engines, generally, includes a cylinder and cylinder head clamped together using fasteners. Associated clamping forces, generally, are greater in a region adjacent to the fasteners than at regions away from the fasteners. Thus, there may exist gradient of clamping loads, causing undesirable distortion and strain near a bore region of the cylinder. Further, a combustion of fuel inside an internal combustion engine may induce additional thermal strain and mechanical strain which may lead to the distortion into the cylinder, cylinder liner, and other components of the internal combustion engine.
[0003] D.E. Patent Application Number 102011012507 discloses ring elements with geometrically divergent inner and outer surfaces with associated inner and outer contours. The ring elements have an asymmetrical outer contour or an asymmetrical inner contour, or a combination thereof, along the different lengths of the major and minor axis of the ring elements.
Summary [0004] In an aspect of the disclosure, a fire ring for an internal combustion engine is disclosed. The internal combustion engine includes a cylinder and a cylinder head, and the fire ring is configured to be disposed between the cylinder and the cylinder head. The fire ring includes a body having an inner circumferential surface and an outer circumferential surface. Each of the inner
-2circumferential surface and the outer circumferential surface is defined around a center axis. At least one of a distance of the inner circumferential surface from the center axis and a distance of the outer circumferential surface from the center axis varying in a circumferential direction as a function of one or more engine parameters.
Brief Description of the Drawings [0005] FIG. 1 is a sectional view of an internal combustion engine, showing internal components, in accordance with an embodiment of the present disclosure;
[0006] FIG. 2 is a top perspective view of the internal combustion engine with a detailed view of a top of the internal combustion engine, in accordance with an embodiment of the present disclosure;
[0007] FIG. 3 is a perspective view of a fire ring of the internal combustion engine, in accordance with an embodiment of the present disclosure;
[0008] FIG. 4 is a side view of the fire ring of FIG. 3, in accordance with an embodiment of the present disclosure; and [0009] FIG. 5 is a cross-sectional view of the fire ring, taken along a plane P shown in FIG. 3, in accordance with an embodiment of the present disclosure.
Detailed Description [0010] Reference will now be made in detail to embodiments of the disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
[0011] Referring now to the drawings, and more particularly to FIGS. 1 and 2, an internal combustion engine 100 is shown. The internal combustion engine 100 includes a cylinder 102 and a cylinder head 104. The cylinder 102 includes a body 106 defining a bore 120 which holds a cylinder liner 110. The cylinder liner 110 may define a cylinder liner bore 128. The internal combustion engine
-3100 further includes a piston 108 disposed within the cylinder liner bore 128 and configured to reciprocate inside the bore 120 between a top dead center and a bottom dead center. Further, the cylinder liner 110 is disposed inside the bore 120 such that a cooling jacket 112 is formed between the cylinder liner 110 and an inner surface 122 of the body 106. In an embodiment, the cylinder liner 110 may abut a shoulder 114 defined by the bore 120. The piston 108 is configured to slide relative to an inner surface 124 of the cylinder liner 110.
[0012] The cooling jacket 112 may be located at an upper half region of the cylinder 102. Further, the cylinder 102 may include a plurality of cooling passages 116 (as shown in FIG. 2) defined into the body 106 to allow a passage of coolant for providing coolant to the cooling jacket 112 and other components of the internal combustion engine 100, for example, intake valves, exhaust valves, fuel injectors etc. The coolant may flow between the cylinder head 104 and the cylinder 102 via a plurality of openings of the cooling passages 116.
[0013] The cylinder head 104 may be attached to the cylinder 102 via a plurality of fastening members 118. In an embodiment, the fastening members 118 may be mounting studs. Although the fastening members 118 are contemplated as the mounting studs, it may be appreciated that the fastening members may be mounting bolts or other fasteners known in the art.
[0014] The internal combustion engine 100 may further include a fire ring 140 disposed between the cylinder 102 and the cylinder head 104. In other embodiments, the fire ring 140 may be received in an annular slot 126 machined in the cylinder liner 110. The fire ring 140 may form a seal as it is compressed between the cylinder 102 and the cylinder head 104 to prevent a leakage of hot gases from inside the cylinder 102.
[0015] Referring to FIGS. 3 and 4, the fire ring 140 includes a body 142 having an upper surface 144 and a lower surface 146 opposite to the upper surface 144. In an assembled position of the fire ring 140, the upper surface 144 forms a sealing contact against the cylinder head 104 and the lower surface 146 forms a sealing contact against the cylinder 102. The upper surface 144 and the lower
-4surface 146 may be parallel to each other. In an embodiment, the upper surface 144 and the lower surface 146 may be parallel to a plane P passing through the body 142 such that the fire ring 140 is a flat fire ring. In another embodiment, the upper surface 144 and the lower surface 146 may not be parallel to the plane P, and thereby the fire ring 140 may be a wavy non-flat fire ring. In certain implementations, the body 142 of the fire ring 140 is an annular body having a center axis X-X’. The center axis X-X’ is selected such that the center axis X-X’ coincides with a center longitudinal axis Y-Y’ of the bore 120, when the fire ring 140 is disposed between the cylinder 102 and the cylinder head 104. The body 142 may further include an inner circumferential surface 148 and an outer circumferential surface 150, both of which are defined around the center axis XX’ along a circumferential direction C-C’ of the body 142. The inner circumferential surface 148 and the outer circumferential surface 150 may extend between the upper surface 144 and the lower surface 146 of the body 142. The inner circumferential surface 148 and the outer circumferential surface 150 are rotationally asymmetric around the center axis X-X’. In an embodiment, a profile defined by the inner circumferential surface 148 may be different from a profile defined by the outer circumferential surface 150.
[0016] Referring now to FIGS. 3 and 5, the inner circumferential surface 148 and the outer circumferential surface 150 may include contours in the plane P and the said contours may be rotationally asymmetric along the circumferential direction C-C’, based on one or more parameters of the internal combustion engine 100. In an embodiment, a curvature of the contours of the inner circumferential surface 148 and the outer circumferential surface 150 may vary continuously along the circumferential direction C-C’. The inner circumferential surface 148 and the outer circumferential surface 150 may be a wavy curvature, along the circumferential direction C-C’, as shown in FIG. 3.
[0017] The inner circumferential surface 148 may be a non-circular surface and a distance of the inner circumferential surface 148 may vary from the center axis X-X’, along the circumferential direction C-C’. As an example, the inner
-5circumferential surface 148 may include points A, B, and C on the plane P positioned at distances Rla, Rib, and Rlc, respectively, from the center axis XX’. The distance Rla of the point A is greater than the distance Rib of the point B, which in turn is greater than the distance Rlc of the point C on the inner circumferential surface 148 (i.e. Rfa>Rfb>Rlc).
[0018] The outer circumferential surface 150 may also be a non-circular surface and a distance of the outer circumferential surface 150 may vary from the center axis X-X’, along the circumferential direction C-C’. As an example, the outer circumferential surface 150 may include points X, Y, and Z on the plane P positioned at distances R2X, R2y, and R2Z, respectively, from the center axis XX’. The distance R2X of the point x is greater than the distance R2y of the point Y, which in turn is greater than the distance R2Z of the point Z on the outer circumferential surface 150 (i.e. R2x>R2y>R2z). It may be appreciated that a distance of only one of the inner circumferential surface 148 and the outer circumferential surface f50 may vary from the center axis X-X’ while keeping a distance of the other constant from the center axis X-X’. Although a crosssection of the fire ring 140 is shown as rectangular in FIG. 2, it may be appreciated that the fire ring 140 may include any other suitable cross-sectional shape, such as, but not limited to, a circular, an elliptical, a quadrilateral, or any other shape known in the art.
[0019] The distance of the inner circumferential surface 148 and the distance of the outer circumferential surface 150 may vary from the center axis X-X’ based on the one or more parameters of the internal combustion engine 100. The one or more parameters may include a number of cooling passages, an arrangement of cooling passages, a number of fastening members, and an arrangement of fastening members, or a combination thereof.
[0020] The arrangement of fastening members may include a circular configuration, a triangular configuration, a rectangular configuration, or any other suitable configuration known in the art. Similarly, the arrangement of cooling passages may include a circular configuration, a triangular configuration, a
-6rectangular configuration, or any other suitable configuration known in the art. The arrangement of fastening members and the arrangement of cooling passages may influence the distance of the inner circumferential surface 148 and the distance of the outer circumferential surface 150 from the center axis X-X’.
[0021] The body 142 may further include a height Ή’ along the center axis XX’. The height H may be measured from the upper surface 144 to the lower surface 146, or vice versa. In an embodiment, the height H of the fire ring 140 may also vary along the circumferential direction C-C’, based on the one or more parameters of the internal combustion engine 100.
[0022] The internal combustion engine 100 may further include a head gasket 170. The head gasket 170 may be mounted between the cylinder 102 and the cylinder head 104. The head gasket 170 may include a rigid structure having an upper sealing surface 172, a lower sealing surface (not shown) opposite the upper sealing surface 172, and a plurality of connecting holes 176 extending between the upper sealing surface 172 and the lower sealing surface. In an embodiment, the head gasket 170 and the fire ring 140 may be integrally formed or coupled with each other and positioned between the cylinder 102 and the cylinder head
104.
[0023] Although, the fire ring 140 has been described to be used for only one cylinder (cylinder 102) of the internal combustion engine 100, it may be contemplated that multiple fire rings, having structural and functional attributes similar to the fire ring 140, may be employed with each cylinder of the multicylinder internal combustion engine in a manner similar to what has been discussed above for the fire ring 140 and the cylinder 102. In an embodiment, one fire ring may have dimensions different from the other fire rings based on the configuration of the multi-cylinder internal combustion engine.
Industrial Applicability [0024] The embodiments of the fire ring 140 hereby explained overcome the problem of the distortions caused to the components, such as to the cylinder liner
-7110, of the internal combustion engine 100. The distortions may be caused by the strain and the pressure generated within the internal combustion engine 100 due to the forces generated in the internal combustion engine 100. The forces may include clamping forces generated while clamping together the components of the internal combustion engine 100 and combustion forces, such as forces due to thermal and mechanical strain, thermal expansion, etc., due to combustion of fuel inside the internal combustion engine 100.
[0025] The fire ring 140 may distribute mechanically induced cylinder head loads or forces between the cylinder 102 and the cylinder head 104 without concentrating the cylinder head loads at any one portion of the cylinder 102. The structure of the fire ring 140 optimizes nominal clamp loading of the components of the internal combustion engine 100.
[0026] Having shown and described preferred embodiments, those skilled in the art will realize that many variations and modifications may be made to affect the described disclosure and still be within the scope of the present disclosure. Additionally, many of the elements indicated above may be altered or replaced by different elements which will provide the same result and fall within the spirit of the disclosure. It is the intention, therefore, to limit the scope of the disclosure only as indicated by the scope of the claims.

Claims (3)

Claims What is claimed is:
1. A fire ring (140) for an internal combustion engine (100), the internal combustion engine (100) including a cylinder (102) and a cylinder head (104), the fire ring (140) configured to be disposed between the cylinder (102) and the cylinder head (104), the fire ring (140) comprising:
a body (142) including an inner circumferential surface (148) and an outer circumferential surface (150), each of the inner circumferential surface (148) and the outer circumferential surface (150) being defined around a center axis (X-X’), wherein at least one of a distance (Rla, Rib, Rlc) of the inner circumferential surface (148) from the center axis (X-X’) and a distance (R2X, R2y, R2Z) of the outer circumferential surface (150) from the center axis (XX’) varies in a circumferential direction (C-C’) as a function of one or more engine parameters.
2. The fire ring of claim 1, wherein the one or more engine parameters include a number of cooling passages (116), an arrangement of cooling passages (116), a number of fastening members (118), and an arrangement of fastening members (118), or a combination thereof.
3. The fire ring of claim 1, wherein the internal combustion engine comprises a head gasket (170), wherein the fire ring (140) is integrally formed or coupled with the head gasket (170).
GB201810367A 2018-06-25 2018-06-25 Fire ring for an internal combustion engine Withdrawn GB2575036A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB201810367A GB2575036A (en) 2018-06-25 2018-06-25 Fire ring for an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201810367A GB2575036A (en) 2018-06-25 2018-06-25 Fire ring for an internal combustion engine

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GB201810367D0 GB201810367D0 (en) 2018-08-08
GB2575036A true GB2575036A (en) 2020-01-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT17674U1 (en) * 2020-07-13 2022-10-15 Powerhouse Engine Solutions Switzerland IP Holding GmbH internal combustion engine system
GB2600240B (en) * 2020-09-30 2024-03-06 Caterpillar Inc Liner for engine block and systems, assemblies, components, and methods thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011012507A1 (en) * 2011-02-25 2012-08-30 Ks Kolbenschmidt Gmbh Annular element for cylinder of internal combustion engine, has annular portion including inner section that is set to deviate from circular shape such that annular portion is fitted into circular groove of cylinder line
CN207583509U (en) * 2017-11-27 2018-07-06 中国第一汽车股份有限公司 Head gasket

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011012507A1 (en) * 2011-02-25 2012-08-30 Ks Kolbenschmidt Gmbh Annular element for cylinder of internal combustion engine, has annular portion including inner section that is set to deviate from circular shape such that annular portion is fitted into circular groove of cylinder line
CN207583509U (en) * 2017-11-27 2018-07-06 中国第一汽车股份有限公司 Head gasket

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT17674U1 (en) * 2020-07-13 2022-10-15 Powerhouse Engine Solutions Switzerland IP Holding GmbH internal combustion engine system
AT17684U1 (en) * 2020-07-13 2022-11-15 Powerhouse Engine Solutions Switzerland IP Holding GmbH internal combustion engine system
US11767803B2 (en) 2020-07-13 2023-09-26 Powerhouse Engine Solutions Switzerland IP Holding GmbH Internal combustion engine system
GB2600240B (en) * 2020-09-30 2024-03-06 Caterpillar Inc Liner for engine block and systems, assemblies, components, and methods thereof

Also Published As

Publication number Publication date
GB201810367D0 (en) 2018-08-08

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)