Engine cooling system
By employing a heat pipe design in the engine cooling system and utilizing simplified U-shaped and annular pipe components between the cylinder head and cylinder block, the problem of increased costs due to complex heat pipe structures is solved, achieving cost savings and improved cooling efficiency, which is in line with lightweight design.
Patent Information
- Application Number
- CN202520315598.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-02-26
AI Technical Summary
Existing engine cooling systems require complex heat pipe structures to avoid overheating, which goes against the trend of lightweight vehicle design and increases manufacturing costs.
The heat pipe design includes a first pipe section that extends in a U-shape or continuous U-shape between the cylinder head and the cylinder block, combined with a second pipe section that is arranged in a ring to form a continuous pipe. The heat dissipation area is increased by cooling fins, avoiding special processing of the cylinder structure.
It achieves reduced manufacturing costs, improved cooling efficiency, conforms to the trend of lightweight design, and enhances space utilization efficiency and heat conduction effect.
Smart Images
Figure CN223689808U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an engine cooling system and an engine cooling system containing a heat pipe. BACKGROUND
[0002] In recent years, in order to ensure that more people can afford, reliable, sustainable and advanced energy access, the research and development of light weight of vehicles contributing to the efficiency of energy is being carried out. However, in order to avoid overheating of the engine of the vehicle, the engine cooling system of the vehicle needs to be provided with a complex heat pipe structure to cool the cylinder of the engine, which is contrary to the design trend of light weight. Therefore, it is necessary to improve the engine cooling system to overcome the above problems. SUMMARY
[0003] The utility model relates to an engine cooling system, which can save manufacturing cost and improve cooling efficiency through simplified heat pipe design.
[0004] According to the embodiment of the utility model, the engine cooling system is suitable for the engine, the cylinder structure of the engine includes the cylinder cover and the cylinder body combined with each other, and the combustion chamber is formed between the cylinder cover and the cylinder body. The engine cooling system comprises a cooling device including a heat pipe, a medium sealed in the heat pipe moves between gas and liquid by phase change, thereby transferring heat, the heat pipe includes a first pipe section, the first pipe section is arranged on the fitting surface between the lower end of the cylinder cover and the upper end of the cylinder body, and the first pipe section reciprocally extends once in U shape or reciprocally extends multiple times in continuous U shape between the combustion chamber and the outside of the engine.
[0005] In the embodiment according to the utility model, the cylinder body includes a plurality of cylinders, the heat pipe further includes a second pipe section, the second pipe section is arranged in a ring shape along the outer periphery of the combustion chamber, and the first pipe section and the second pipe section are connected with each other to form a continuous pipe.
[0006] In the embodiment according to the utility model, when the engine is observed from above, at least one of the first pipe section and the second pipe section is arranged in a direction perpendicular to the crankshaft of the cylinder structure.
[0007] In the embodiment according to the utility model, when the engine is observed from above, at least one of the first pipe section and the second pipe section is arranged opposite across the crankshaft of the cylinder structure.
[0008] In the embodiment according to the utility model, each of the plurality of cylinders is provided with the first pipe section, and the cylinder structure has a fastening part for fixing the cylinder head and the cylinder body between the adjacent first pipe sections.
[0009] In the embodiment according to the utility model, the engine cooling system further comprises a cooling fin, a protruding part of the first pipe section protrudes to the outside of the engine, and the cooling fin is arranged on the protruding part.
[0010] In the embodiment according to the utility model, the cylinder body comprises a plurality of cylinders, and the cooling fin at any one of the plurality of cylinders is connected to the cooling fin at another adjacent one of the plurality of cylinders.
[0011] In the embodiment according to the utility model, when viewed from above the engine, the first pipe section and the cooling fin are located within the outline of the cylinder body.
[0012] In the embodiment according to the utility model, the heat pipe further comprises a third pipe section, the third pipe section bypasses the outer periphery of the cooling fin and is connected to the first pipe section or the second pipe section, and the third pipe section is formed by a single pipe.
[0013] Based on the above, in the engine cooling system of the utility model, the first pipe section of the heat pipe extends between the combustion chamber and the outside of the engine in a continuous S shape, which is easier to set up than a plurality of separately arranged pipes and can reduce the setting cost. Moreover, the first pipe section extending in a U shape can increase the heat absorption and heat dissipation area. In addition, the first pipe section of the heat pipe is arranged between the cylinder head and the cylinder body, which can be easily set up, so that special processing of the cylinder structure is not required for setting up the heat pipe. Therefore, the engine cooling system of the utility model can save manufacturing cost and improve cooling efficiency through the simplified heat pipe design, which is conducive to the lightweight design trend. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 is a perspective view of an engine of an embodiment of the utility model;
[0015] Figure 2 is Figure 1 a top view of a partial structure of the engine of
[0016] Figure 3 is a top view of partial components of a partial structure of an engine of another embodiment of the utility model.
[0017] BRIEF DESCRIPTION OF DRAWINGS
[0018] 50: engine;
[0019] 52: Cylinder structure
[0020] 521: Cylinder head
[0021] 522: Cylinder block
[0022] 5221: Cylinder
[0023] 5221a: Combustion chamber
[0024] 524: Fitting surface
[0025] 52a: Fastening portion
[0026] 100: Engine cooling system
[0027] 110: Cooling device
[0028] 112: Heat pipe
[0029] 1121, 1121': First pipe portion
[0030] 1121a: Protrusion
[0031] 1122: Second pipe portion
[0032] 1123: Third pipe portion
[0033] 1124: Crankshaft
[0034] 120: Cooling fin
[0035] X, Y, Z: Axial direction DETAILED DESCRIPTION
[0036] Reference will now be made in detail to the exemplary embodiments of the present application, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used in the different drawings / taken to indicate the same or similar elements.
[0037] Figure 1 is a perspective view of an engine according to an embodiment of the present application, showing the axial directions X, Y, Z. Figure 2 is a top view of a partial structure of the engine of Figure 1 . Please refer to Figure 1 and Figure 2 , the cylinder structure 52 of the engine 50 of the present embodiment includes a cylinder head 521 and a cylinder block 522 which are combined with each other, and a combustion chamber 5221a is formed between the cylinder head 521 and the cylinder block 522. The detailed structure and the principle of the cylinder are known in the art, and thus will not be described here.
[0038] The engine cooling system 100 of the present embodiment includes a cooling device 110 including a heat pipe 112, which is, for example, an oscillating heat pipe (OHP) made of copper and disposed in the engine 50. A medium (for example, water) sealed in the heat pipe 112 moves by phase transition between gas and liquid, thereby transferring heat. In the present embodiment, the heat pipe 112 can be formed to have an elliptical cross section so that the heat pipe 112 is in close contact with the cylinder block 522, thereby improving heat transfer efficiency. The detailed structure and the principle of operation of the oscillating heat pipe are known in the art and will not be described here.
[0039] Please refer to Figure 1 The heat pipe 112 of the present embodiment includes a first pipe portion 1121 disposed at the mating surface 524 between the lower end of the cylinder head 521 (indicated by Figure 1 ) and the upper end of the cylinder block 522. The first pipe portion 1121 extends in a continuous U-shape between the combustion chamber 5221a and the outside of the engine 50 multiple times. In other embodiments, the first pipe portion 1121 can extend in a U-shape between the combustion chamber 5221a and the outside of the engine 50 once.
[0040] As described above, in the engine cooling system 100 of the present embodiment, the first pipe portion 1121 of the heat pipe 112 extends in a continuous U-shape between the combustion chamber 5221a and the outside of the engine 50, which is easier to set up than a plurality of individually disposed pipes and can reduce the setup cost. Also, the first pipe portion 1121 extending in a U-shape can increase the heat absorption and heat dissipation area. Furthermore, the first pipe portion 1121 of the heat pipe 112 is disposed between the cylinder head 521 and the cylinder block 522, so it can be easily set up, and thus it is not necessary to specially process the cylinder structure 52 for setting up the heat pipe 112. Specifically, if the heat pipe is disposed at a position other than between the cylinder head 521 and the cylinder block 522, the heat pipe must be cast into the cylinder head 521 or the cylinder block 522, and in this arrangement, it is not possible to replace the heat pipe individually, so when the heat pipe needs to be replaced, it is necessary to replace a large number of components and use an expensive heat pipe material that can withstand the high temperature of casting, and the present embodiment does not have these concerns by disposing the heat pipe between the cylinder head 521 and the cylinder block 522. Also, the first pipe portion 1121 disposed between the cylinder head 521 and the cylinder block 522 can cool the cylinder head 521 and the cylinder block 522 at the same time. Thus, the engine cooling system 100 of the present embodiment can save manufacturing costs and improve cooling efficiency through a simplified heat pipe design, which is advantageous for the design trend of lightweight.
[0041] The cylinder block 522 of this embodiment includes a plurality of cylinders 5221, and a plurality of combustion chambers 5221a are respectively located in the plurality of cylinders 5221. A plurality of first pipe sections 1121 are respectively provided in the plurality of cylinders 5221, that is, a first pipe section 1121 is provided in each of the plurality of cylinders 5221. The heat pipe 112 also includes a plurality of second pipe sections 1122, which are respectively provided in the plurality of cylinders 5221, that is, a second pipe section 1122 is provided in each of the plurality of cylinders 5221. The second pipe sections 1122 are arranged in a ring shape along the outer periphery of the combustion chambers 5221a. Specifically, each combustion chamber 5221a has, for example, four second pipe sections 1122 on its outer periphery, which are arranged in a ring. The first pipe sections 1121 and the second pipe sections 1122 are interconnected to form a continuous pipeline. Accordingly, the heat absorption area of the heat pipe 112 can be further increased by the provision of the second pipe section 1122, thereby increasing the heat absorption of the heat pipe 112.
[0042] In this embodiment, when the engine 50 is viewed from above, the first pipe section 1121 and the second pipe section 1122 are, for example, along the crankshaft 1124 perpendicular to the cylinder structure 52. Figure 2 The crankshaft is schematically indicated by a dashed line in the direction (axial Y). Accordingly, the engine 50 can be avoided from being too large in the extension direction (axial X) of the crankshaft 1124 due to the installation of the heat pipe 112, and the space around the cylinder 5221 can be effectively used to install the heat pipe 112, thereby improving the space utilization efficiency of the engine 100.
[0043] Furthermore, when the engine 50 is viewed from above, at least one of these first pipe sections 1121 in this embodiment ( Figure 2 (shown as a plurality of first conduit sections 1121) and at least one of these first conduit sections 1121 ( Figure 2 The first pipe sections 1121 shown are arranged opposite each other across the crankshaft 1124 of the cylinder structure 52. Similarly, at least one of these second pipe sections 1122 in this embodiment ( Figure 2 Shown as a plurality of second conduit sections 1122) and at least one of these second conduit sections 1122 ( Figure 2 The secondary pipe sections (1122) shown are arranged opposite each other across the crankshaft 1124 of the cylinder structure 52. Accordingly, the cooling effect can be further enhanced, and the space around the cylinder 5221 can be effectively utilized to install the heat pipes 112, thereby further improving the space utilization efficiency of the engine 100.
[0044] like Figure 2As shown, the cylinder structure 52 of the present embodiment has a fastening portion 52a for fixing the cylinder head 521 and the cylinder block 522 between the adjacent first pipe portions 1121. Accordingly, the tightness between the heat pipe 112, the cylinder head 521 and the cylinder block 522 can be increased by the fastening force of the fastening portion 52a, and the space around the cylinders 5221 can be effectively utilized to arrange the heat pipe 112 and the fastening portion 52a, so as to further improve the space utilization efficiency of the engine 100. By increasing the tightness between the heat pipe 112, the cylinder head 521 and the cylinder block 522 by the fastening force of the fastening portion 52a, the heat conduction efficiency between the heat pipe 112 and the cylinder head 521 and the heat conduction efficiency between the heat pipe 112 and the cylinder block 522 can be increased, so as to further improve the cooling efficiency.
[0045] Please refer to Figure 1 and Figure 2 In the present embodiment, the engine cooling system 100 further comprises cooling fins 120. The protruding portions 1121a of the first pipe portions 1121 protrude to the outside of the engine 100, and the cooling fins 120 are arranged on the protruding portions 1121a of the first pipe portions 1121. Accordingly, the heat dissipation area can be increased by the arrangement of the cooling fins 120, and the space around the cylinders 5221 can be effectively utilized to arrange the cooling fins 120, so as to further improve the space utilization efficiency of the engine 100. Further, the cooling fin 120 at any one of the cylinders 5221 is connected to the cooling fin 120 at another adjacent one of the cylinders 5221. That is, multiple portions of the cooling fins 120 are arranged to respectively correspond to the multiple cylinders 5221 and are connected to each other. Thus, the cooling fins 120 can have a large heat dissipation area, so as to improve the heat dissipation efficiency.
[0046] The heat of the cylinder block 5221 and the combustion chamber 5221a thereof is absorbed by the first pipe portions 1121 and the second pipe portions 1122 adjacent to the combustion chamber 5221a, and the medium absorbing the heat flows to the protruding portions 1121a of the first pipe portions 1121 and the third pipe portions 1123, so as to be dissipated by the cooling fins 120 at the protruding portions 1121a and / or the third pipe portions 1123.
[0047] As shown, when the engine 50 (indicated by the arrow in the figure) is started, the heat of the engine 50 is absorbed by the first pipe portions 1121 and the second pipe portions 1122 adjacent to the combustion chamber 5221a, and the medium absorbing the heat flows to the protruding portions 1121a of the first pipe portions 1121 and the third pipe portions 1123, so as to be dissipated by the cooling fins 120 at the protruding portions 1121a and / or the third pipe portions 1123. Figure 2 Figure 1 ) and the cooling fins 120 are located within the outline of the cylinder block 522. By this arrangement, the first pipe portion 1121 and the cooling fins 120 can avoid interfering with other components around the cylinder block 522, and the arrangement space can be effectively utilized. In addition, the heat pipe 112 of the present embodiment further includes a third pipe portion 1123 formed by a single pipe, the third pipe portion 1123 bypassing the outer periphery of the cooling fins 120 and being connected to the second pipe portion 1122, and being indirectly connected to the first pipe portion 1121 through the second pipe portion 1122. Accordingly, the first pipe portion 1121, the second pipe portion 1122, and the third pipe portion 1123 form a continuous pipe, and a certain degree of overall flow of the medium is generated to avoid stagnation of the medium.
[0048] The present utility model does not limit the arrangement of the first pipe portion, which is illustrated below by referring to the drawings. Figure 3 is a top view of part of the components of the partial structure of the engine of another embodiment of the present utility model. Figure 3 The main difference between the illustrated embodiment and the aforementioned embodiments is that, Figure 3 The heat pipe 112 in the present embodiment further includes a first pipe portion 1121', the first pipe portion 1121' being arranged in a direction (axial direction X) parallel to the crankshaft 1124. Figure 3 The crankshaft is schematically indicated by a dashed line.
[0049] In summary, in the engine cooling system of the present utility model, the first pipe portion of the heat pipe extends in a continuous S-shape between the combustion chamber and the outside of the engine, which is easier to arrange and can reduce the arrangement cost compared to a plurality of separately arranged pipes. In addition, the first pipe portion extending in a U-shape can increase the heat absorption and heat dissipation area. Furthermore, the first pipe portion of the heat pipe is arranged between the cylinder head and the cylinder block, which can be easily arranged, so that the cylinder structure does not need to be specially processed for the arrangement of the heat pipe. Therefore, the engine cooling system of the present utility model can save manufacturing costs and improve cooling efficiency through simplified heat pipe design, which is conducive to the design trend of lightweight.
[0050] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the present utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.
Claims
1. An engine cooling system adapted for use with an engine having a cylinder structure including a cylinder head and a cylinder block combined with each other, a combustion chamber being formed between the cylinder head and the cylinder block, characterized in that, Comprising: a cooling device including a heat pipe, a medium sealed in the heat pipe moves between gas and liquid by phase change, thereby performing heat transfer, the heat pipe includes a first pipe section provided to a mating surface between a lower end of the cylinder head and an upper end of the cylinder block, the first pipe section reciprocally extends once in a U shape or reciprocally extends multiple times in a continuous U shape between the combustion chamber and the outside of the engine.
2. The engine cooling system according to claim 1, wherein the cylinder block includes a plurality of cylinders, the heat pipe further includes a second pipe section, the second pipe section is provided to each of the plurality of cylinders in a ring shape along an outer periphery of the combustion chamber, the first pipe section and the second pipe section are connected to each other to form a continuous pipe.
3. The engine cooling system according to claim 2, wherein at least one of the first pipe section and the second pipe section is arranged in a direction perpendicular to a crankshaft of the cylinder structure when the engine is viewed from above.
4. The engine cooling system according to claim 2, wherein at least one of the first pipe section and the second pipe section is arranged opposite across a crankshaft of the cylinder structure when the engine is viewed from above.
5. The engine cooling system according to claim 2, wherein the first pipe section is provided to each of the plurality of cylinders, the cylinder structure has a fastening portion for fastening the cylinder head and the cylinder block between adjacent first pipe sections.
6. The engine cooling system according to claim 1, further comprising: a cooling fin, a protruding portion of the first pipe section protrudes to the outside of the engine, the cooling fin is provided to the protruding portion.
7. The engine cooling system according to claim 6, wherein the cylinder block includes a plurality of cylinders, the cooling fin at any one of the plurality of cylinders is connected to the cooling fin at another adjacent one of the plurality of cylinders.
8. The engine cooling system according to claim 6, wherein the first pipe section and the cooling fin are located within an outline of the cylinder block when the engine is viewed from above.
9. The engine cooling system according to claim 6, wherein the heat pipe further includes a third pipe section, the third pipe section bypasses an outer periphery of the cooling fin and is connected to the first pipe section, the third pipe section is formed by a single pipe.