GB1586151A - Cylinder liner cooling in a reciprocating-piston internal combustion engine - Google Patents
Cylinder liner cooling in a reciprocating-piston internal combustion engine Download PDFInfo
- Publication number
- GB1586151A GB1586151A GB21752/78A GB2175278A GB1586151A GB 1586151 A GB1586151 A GB 1586151A GB 21752/78 A GB21752/78 A GB 21752/78A GB 2175278 A GB2175278 A GB 2175278A GB 1586151 A GB1586151 A GB 1586151A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylinder liner
- heat pipes
- liner
- flange
- heat
- 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.)
- Expired
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 17
- 238000001816 cooling Methods 0.000 title claims description 16
- 239000000498 cooling water Substances 0.000 claims description 22
- 239000002826 coolant Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 230000002349 favourable effect Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/06—Platens or press rams
- B30B15/062—Press plates
- B30B15/064—Press plates with heating or cooling means
-
- 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
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/22—Liquid cooling characterised by evaporation and condensation of coolant in closed cycles; characterised by the coolant reaching higher temperatures than normal atmospheric boiling-point
- F01P2003/2278—Heat pipes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
(54) CYLINDER LINER COOLING IN A RECIPROCATING
PISTON INTERNAL COMBUSTION ENGINE
(71) We, KLocKNER-HuMsoLDT-DEuTz AKTIENGESELLSCHAFT, a German Body
Corporate, of Kdln-Deutz, German Federal
Republic, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following state ment This invention relates to a reciprocatingpiston internal combustion engine having at least one cylinder liner, surrounded by a cooling water or cooling air space, the cylinder liner optionally having a flange by which it bears upon a mounting surface in the engine structure and being surmounted by a cylinder head.
The cylinder liners of high-performance reciprocating-piston internal combustion engines are subject to very heavy thermal stresses due to their high power output.
This is true more especially for the region of the liner flange, which needs to be cooled especially intensively to keep within the permissible temperature range, firstly, of the thermal stressing of the material and, secondly, to maintain an adequate lubricating film at the running surfaces. Consequently, it is necessary to lead the cooling medium as close as possible to the running surface of the liner. In this way the high temperature given up by the gases of combustion can be dissipated efficiently by improved heat transfer, i.e. a shorter heat flux path. However, this requirement can be met only by a risky reduction of the crosssection of the cylinder liner, which is also subject to high mechanical stressing.In water-cooled reciprocating-piston internal combustion engines drilled bores or discharge cross-sections or, alternatively, cooling rings serve for improving the liner flange cooling in known types of engine. However, problems arise here because of the need to seal the combustion space from the cooling water, to achieve a simple discharging of the cooling water and not to reduce the wall thickness of the cylinder liner to an impermissible extent.
It is therefore an aim of the present invention to avoid the above-described drawbacks and to create a cylinder liner cooling arrangement which is advantageous in terms of cost and ease of manufacture. More especially, the upper section of the cylinder liner must provide a favourable heat transfer to the cooling medium in the region of the flange, combined with adequate strength.
The aim of the invention is achieved by providing a reciprocating-piston internal combustion engine having at least one cylinder liner surrounded by a cooling water or cooling air space, the cylinder liner optionally having a flange by which it bears upon a mounting surface in the engine structure and being surmounted by a cylinder head, comprising a plurality of heat pipes in the region of the hottest zone of the cylinder liner and preferably in the portion facing the cylinder head, the heat pipes being inserted in the walls of the cylinder liner or in the flange if present and extending radially outwardly into the cooling water or cooling air space, the heat pipes having means, for example a capillary structure, in their interiors which enables a liquid heat carrier to be conveyed through the heat pipes even against the force of gravity.
The heat conductivity of the heat pipes may reach exceptionally high values of up to 500 times that of copper.
Heat pipes for transferring heat in heat exchangers are already known in heating and air conditioning technology (Die Kate, Issue No. 6/1974, Pages 210 to 224).
The heat pipes described in this technical article are constructed as rod-shaped hollow bodies which are evacuated and are partly filled with liquid. Liquid evaporates at one end of the pipes by being heated and condenses at the other end while giving up heat.
However, the publication gives no information about solving the heat technology problems in the high temperature region of a cylinder liner. The optional disposition of heat pipes in the flange of the cylinder liner, with the heat pipes being led almost up to the running surface of the cylinder liner, allows the high temperature to be dissipated to the cooling medium in an advantageous manner. The heat conveying is performed while meeting little resistance, even over long distances. The resulting advantage is not only that heat is abstracted from the external surface of the cylinder liner but that intensive cooling occurs in the region of the cylinder liner in which the embedded ends of the heat pipes lie.An arrangement of the heat pipes in the liner flange, in addition, leads to the cooling of the liner flange thereby avoiding excessive thermal and mechanical stressing of the liner flange and the mounting surface of the engine structure.
One form of the invention provides that the heat pipes follow the course of the generatrix of a cone having its tip directed towards the cylinder head, and in another form the heat pipes follow the generatrix of a hyperboloid which is arranged concentrically with the axis of the liner. In this way the projecting portions of the heat pipes can be made long, and, over one region, to protrude into an area of the cooling medium in which the latter is at a low temperature. In addition, the arrangement or construction of the heat pipes achieves that the radial dimensions of the cylinder liner are not, or only slightly, increased.
For a water-cooled reciprocating-piston internal combustion engine it is proposed, furthermore, that the cylinder liner should have at least one annular recess in its surface in which the free ends of the heat pipes are arranged. In this way the contours of the cylinder liner serving for fitting are left unchanged, thus ensuring an adequate guiding of the cylinder liner inside the crankcase.
Further details are shown in the accompanying drawings which show two simplified examples of the invention. In the drawings:
Figure 1 shows a partial longitudinal section through a crankcase and a cylinder liner of a water-cooled reciprocating-piston internal combustion engine with a row of heat pipes extending radially obliquely outwards; and
Figure 2 shows a partial longitudinal section through a crankcase and a cylinder liner of a water-cooled reciprocating-piston internal combustion engine with two heat pipes extending successively radially obliquely outwards in the axial direction of the cylinder liner.
In Figures 1 and 2, reference 1 denotes part of an engine structure in which a cylinder liner 2 is inserted. The cylinder liner 2 has a liner flange 3 by which it bears upon a mounting surface 4 of the engine structure 1. A cooling water space 5 is provided between the engine structure 1 and the cylinder liner 2, which cooling water space communicates with annular recesses 6 in the outer diameter of the cylinder liner 2. Heat pipes 7, which extend radially obliquely outwards in the cylinder liner 2, are led close to the running surface of the cylinder liner 2. In Figure 1 the heat pipes 7 are arranged in a row near the periphery of the cylinder liner 2, while in Figure 2 they are arranged in two rows.
As may be seen from the Figures, the cylinder liner 2 has heat abstracted from it in the region of the liner flange with the aid of the heat pipes 7 without the need to lead cooling water from the cooling water space 5 to the liner flange 3 or to the mounting surface 4 of the engine structure 1. The hottest zone of the cylinder liner 2 here communicates with cooling water at low temperature in the recesses 6 via the heat pipes 7. Thus, a high thermal stressing of the liner flange 3 and of the running surface of the cylinder liner 2 can be avoided by providing favourable heat dissipation.
To improve the heat transfer in this region, the required wall thickness of the cylinder liner 2 can remain undiminished, and no measures for leading cooling water to the liner flange 3 are necessary.
WHAT WE CLAIM IS:
1. A reciprocating-piston internal combustion engine having at least one cylinder liner surrounded by a cooling water or cooling air space, the cylinder liner optionally having a flange by which it bears upon a mounting surface in the engine structure and being surmounted by a cylinder head, comprising a plurality of heat pipes in the region of the hottest zone of the cylinder liner and preferably in the portion facing the cylinder head, the heat pipes being inserted in the walls of the cylinder liner or in the flange if present and extending radially outwardly into the cooling water or cooling air space, the heat pipes having means, for example a capillary structure, in their interiors which enables a liquid heat carrier to be conveyed through the heat tubes even against the force of gravity.
2. An engine according to claim 1, in which the heat pipes follow the course of the generatrix of a cone having its tip directod towards the cylinder head.
3. An engine according to claim 1, in which the heat pipes follow the course of the generatrix of a hyperboloid which is
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (5)
1. A reciprocating-piston internal combustion engine having at least one cylinder liner surrounded by a cooling water or cooling air space, the cylinder liner optionally having a flange by which it bears upon a mounting surface in the engine structure and being surmounted by a cylinder head, comprising a plurality of heat pipes in the region of the hottest zone of the cylinder liner and preferably in the portion facing the cylinder head, the heat pipes being inserted in the walls of the cylinder liner or in the flange if present and extending radially outwardly into the cooling water or cooling air space, the heat pipes having means, for example a capillary structure, in their interiors which enables a liquid heat carrier to be conveyed through the heat tubes even against the force of gravity.
2. An engine according to claim 1, in which the heat pipes follow the course of the generatrix of a cone having its tip directod towards the cylinder head.
3. An engine according to claim 1, in which the heat pipes follow the course of the generatrix of a hyperboloid which is
arranged concentrically with the axis of the cylinder liner.
4. An engine according to any preceding claim having a water-cooled cylinder liner, in which the cylinder liner has at least one annular recess in its outer surface into which the free ends of the heat pipes project.
5. A reciprocating-piston internal combustion engine having at least one cylinder
liner surrounded by a cooling water or
cooling air space, the cylinder liner optionally having a flange by which it bears upon a mounting surface in the engine structure and being surmounted by a cylinder head, constructed and arranged substantially as herein described, with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2734253A DE2734253C2 (en) | 1977-07-29 | 1977-07-29 | Reciprocating internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1586151A true GB1586151A (en) | 1981-03-18 |
Family
ID=6015147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21752/78A Expired GB1586151A (en) | 1977-07-29 | 1978-05-24 | Cylinder liner cooling in a reciprocating-piston internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5425340A (en) |
| DE (1) | DE2734253C2 (en) |
| GB (1) | GB1586151A (en) |
| IT (1) | IT1095348B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012112084A1 (en) * | 2011-02-17 | 2012-08-23 | Volvo Lastvagnar Ab | Cylinder head cooling insert |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2945534A1 (en) * | 1979-11-10 | 1981-05-21 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Air cooled IC engine cooling - uses heat pipes with hot zone in gas exchange channel or injector pipe wall and cool zone in cooling rib |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE408738C (en) * | 1925-01-24 | Eric Brown | Internal combustion piston engine | |
| GB211847A (en) * | 1923-02-20 | 1925-04-20 | Sulzer Ag | Improvements in or relating to the cylinders of internal combustion engines |
-
1977
- 1977-07-29 DE DE2734253A patent/DE2734253C2/en not_active Expired
-
1978
- 1978-04-12 JP JP4225278A patent/JPS5425340A/en active Pending
- 1978-04-28 IT IT22893/78A patent/IT1095348B/en active
- 1978-05-24 GB GB21752/78A patent/GB1586151A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012112084A1 (en) * | 2011-02-17 | 2012-08-23 | Volvo Lastvagnar Ab | Cylinder head cooling insert |
Also Published As
| Publication number | Publication date |
|---|---|
| IT7822893A0 (en) | 1978-04-28 |
| JPS5425340A (en) | 1979-02-26 |
| IT1095348B (en) | 1985-08-10 |
| DE2734253C2 (en) | 1985-08-22 |
| DE2734253A1 (en) | 1979-02-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |