Cylinder structure

Abstract

The utility model provides a cylinder structure which can effectively reduce exhaust temperature. The cylinder structure includes: a plurality of combustion chambers arranged along a cylinder row; the cylinder cover is provided with an exhaust channel, the exhaust channel comprises a plurality of exhaust parts and an exhaust collection part, the exhaust parts are connected to the combustion chambers, the exhaust collection part is located in the center of the cylinder structure, the exhaust parts are collected in the exhaust collection part, and the cylinder structure further comprises a water jacket. The water jacket covers the exhaust channel, the water jacket and the exhaust channel form a cylinder wall, the cylinder wall is provided with a plurality of aligned textures, and the textures are at least formed on the top surfaces of the exhaust parts, the bottom surfaces of the exhaust parts, the top surface of the exhaust collection part and the bottom surface of the exhaust collection part.

Description

Technical Field

[0001] This utility model relates to a partial structure of an internal combustion engine, and more particularly to a cylinder structure. Background Technology

[0002] Since then, efforts have continued to mitigate climate change or reduce its impacts, and research and development related to improving emissions are underway to achieve these goals. However, in the research and development of emissions improvement, excessively high exhaust gas temperatures in vehicle cylinders are detrimental to improving vehicle exhaust emissions. Therefore, it is necessary to improve the cylinder exhaust structure to overcome the aforementioned problem. Utility Model Content

[0003] This invention relates to a cylinder structure that can effectively reduce exhaust temperature.

[0004] According to an embodiment of the present invention, a cylinder structure includes: a plurality of combustion chambers arranged along a cylinder bank; and a cylinder head having an exhaust passage, the exhaust passage including a plurality of exhaust portions and an exhaust collection portion, the plurality of exhaust portions being connected to the plurality of combustion chambers, the exhaust collection portion being located at the center of the cylinder structure, the plurality of exhaust portions being collected in the exhaust collection portion, the cylinder structure further including a water jacket covering the exhaust passage, the water jacket and the exhaust passage forming a cylinder wall, the cylinder wall having a plurality of aligned textures, the textures being formed at least on the top surface of the plurality of exhaust portions, the bottom surface of the plurality of exhaust portions, the top surface of the exhaust collection portion and the bottom surface of the exhaust collection portion.

[0005] In an embodiment of the present invention, the plurality of exhaust portions include at least one first exhaust portion and a second exhaust portion, wherein the length of the at least one first exhaust portion extending from the exhaust collection portion is greater than the length of the second exhaust portion extending from the exhaust collection portion, and the exhaust channel has a planar portion, wherein the planar portion is formed at least on the top surface of the second exhaust portion and the bottom surface of the second exhaust portion at the intersection of the at least one first exhaust portion and the second exhaust portion.

[0006] In an embodiment of the present invention, the water jacket and the exhaust channel respectively constitute two surfaces of the cylinder wall, and the texture is formed on the two surfaces.

[0007] In an embodiment of the present invention, the texture of the exhaust channel is a vortex-shaped texture.

[0008] In an embodiment of the present invention, the texture of the water jacket is a wavy texture, which includes a plurality of straight lines perpendicular to the cooling water flow direction of the water jacket.

[0009] Based on the above, in the cylinder structure of this invention, the exhaust passage has textured surfaces on the top and bottom surfaces of the exhaust section and the exhaust collection section. Accordingly, the heat dissipation area of ​​the exhaust passage can be increased without increasing its size, thereby improving its heat dissipation efficiency. Thus, the cylinder structure of this invention can effectively reduce exhaust temperature. Attached Figure Description

[0010] Figure 1 This is a perspective view of a portion of the cylinder structure according to an embodiment of the present invention;

[0011] Figure 2 Show Figure 1 The exhaust passage;

[0012] Figure 3 Show Figure 1 The exhaust channel is covered by a water jacket;

[0013] Figure 4 yes Figure 3 Rear view of the water jacket;

[0014] Figure 5 yes Figure 2 A three-dimensional view of the exhaust channel from another perspective;

[0015] Figure 6 yes Figure 3 A partially enlarged schematic diagram of the exhaust channel and water jacket;

[0016] Figure 7 yes Figure 3 A cross-sectional view of the water jacket along line II;

[0017] Figure 8 yes Figure 3 A cross-sectional view of the water jacket along line II-II.

[0018] Explanation of icon numbers

[0019] 50: Exhaust pipe;

[0020] 60: Catalyst device;

[0021] 100: Cylinder structure;

[0022] 110: Cylinder;

[0023] 1101, 1102, 1103: Combustion chamber;

[0024] 112: Cylinder wall;

[0025] 120: Cylinder head;

[0026] 122: Cylinder head body;

[0027] 124: Exhaust passage;

[0028] 1241A, 1241B, 1241C: Exhaust section;

[0029] 1242: Exhaust gas collection section;

[0030] 130: Water jacket;

[0031] 132: Cooling water inlet;

[0032] 134: Cooling water outlet;

[0033] C: Storage space;

[0034] D: Cooling water flow direction;

[0035] P: Intersection;

[0036] S1, S2, S3: curved surfaces;

[0037] S4, S5: Reference planes;

[0038] T1: Depressed structure;

[0039] T2: Protruding structure;

[0040] X, Y, Z: Axial axes. Detailed Implementation

[0041] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same component reference numerals are used in the drawings and description to denote the same or similar parts.

[0042] Figure 1 This is a perspective view of a portion of the cylinder structure according to an embodiment of the present invention, showing the axial directions X, Y, and Z. Please refer to... Figure 1 The cylinder structure 100 of this embodiment is, for example, the cylinder structure of an internal combustion engine in a vehicle, which includes a plurality of cylinders 110 and a cylinder head 120 covering these cylinders 110. These cylinders 110 each have combustion chambers 1101, 1102, and 1103, which are arranged along a cylinder bank formed by these cylinders 130. The cylinder head 120 includes a cylinder head body 122 and an exhaust passage 124 integrated into the cylinder head body 120. The exhaust passage 124 includes a plurality of exhaust sections (shown as a pair of exhaust sections 1241A, a pair of exhaust sections 1241B, and a pair of exhaust sections 1241C) and an exhaust collection section 1242. The exhaust collection section 1242 is located at the center of the cylinder structure 100.

[0043] One end of each of the exhaust outlets 1241A, 1241B, and 1241C is connected to one of the combustion chambers 1101, 1102, and 1103, and the other ends of each exhaust outlet 1241A, 1241B, and 1241C converge at an exhaust collection section 1242. The exhaust collection section 1242 is connected to a catalytic converter 60 via an exhaust pipe 50. Although not shown in detail, the catalytic converter 60 contains a catalyst for purifying components in the exhaust gas. Exhaust gas from the combustion chambers 1101, 1102, and 1103 flows through the exhaust outlets 1241A, 1241B, and 1241C to the exhaust collection section 1242, and then through the exhaust collection section 1242 and the exhaust pipe 50 to the catalytic converter 60, where it is purified before being discharged. The detailed operation of the cylinders of the vehicle's internal combustion engine and the function of the catalytic converter are known in the art and will not be described in detail here.

[0044] Figure 2 Show Figure 1 Exhaust passage. Please refer to... Figure 2 In this embodiment, exhaust portion 1241A has an arcuate surface S1 that curves inward toward the exhaust channel 124, exhaust portion 1241B has an arcuate surface S2 that curves inward toward the exhaust channel 124, and exhaust portion 1241C has an arcuate surface S3 that curves inward toward the exhaust channel 124. More specifically, arcuate surface S1 is the outer surface of exhaust portion 1241A and is a concave arcuate surface, arcuate surface S2 is the outer surface of exhaust portion 1241B and is a concave arcuate surface, and arcuate surface S3 is the outer surface of exhaust portion 1241C and is a concave arcuate surface. The exhaust channel 124 is formed into a flared shape extending from the exhaust collection portion 1242 by the arcuate surface S1 of exhaust portion 1241A and the arcuate surface S3 of exhaust portion 1241C. Accordingly, by utilizing the arcuate surface S1 of exhaust section 1241A, the arcuate surface S2 of exhaust section 1241B, the arcuate surface S3 of exhaust section 1241C, and the flared shape of exhaust passage 124, the flow paths of exhaust sections 1241A, 1241B, and 1241C are enlarged, resulting in smoother flow paths and increased length. This allows exhaust gas to flow smoothly along exhaust sections 1241A, 1241B, and 1241C to exhaust collection section 1242, and also increases the heat dissipation area of ​​exhaust passage 124. Therefore, the cylinder structure 100 of this embodiment can increase the flow rate and heat dissipation efficiency of exhaust sections 1241A, 1241B, and 1241C.

[0045] Figure 3 Show Figure 1 The exhaust passage is covered by a water jacket, with exhaust passage 124 schematically shown in dashed lines. Figure 4 yes Figure 3 Rear view of the water jacket. Please refer to... Figure 3 and Figure 4The cylinder structure 100 of this embodiment also includes a water jacket 130. The water jacket 130 has a receiving space C, and the water jacket 130 covers the exhaust passage 124 such that the exhaust passage 124 is at least partially located within the receiving space C. The water jacket 130 and the exhaust passage 124 constitute a portion of the cylinder wall of the cylinder 110.

[0046] Figure 5 yes Figure 2 The exhaust channel is shown in a three-dimensional view from another perspective. (See image below.) Figure 2 and Figure 5 As shown, a portion of the cylinder wall (i.e., the surface of the exhaust passage 124) has a texture (schematically shown as a plurality of recessed structures T1, adjacent recessed structures T1 being aligned with each other), the texture being as follows: Figure 2 As shown, the top surfaces of the exhaust sections 1241A, 1241B, and 1241C and the top surface of the exhaust collection section 1242 are formed, and as Figure 5 The bottom surfaces of the exhaust portions 1241A, 1241B, and 1241C, and the bottom surface of the exhaust collection portion 1242 are shown. Accordingly, the heat dissipation area of ​​the exhaust passage 124 can be increased without increasing the size of the exhaust passage 124, thereby improving the heat dissipation efficiency of the exhaust passage 124. Thus, the cylinder structure 100 of this embodiment can effectively reduce the exhaust temperature.

[0047] Please refer to Figure 2 and Figure 5 In this embodiment, the exhaust portions 1241A, 1241B, and 1241C include at least one first exhaust portion (exhaust portion 1241A, 124C) and one second exhaust portion (exhaust portion 1241B). The length of the first exhaust portion (exhaust portion 1241A, 124C) extending from the exhaust collection portion 1242 is greater than the length of the second exhaust portion (exhaust portion 1241B) extending from the exhaust collection portion 1242. The exhaust channel 124 has a planar portion 1243 that does not form the texture. The planar portion 1243 is located at the intersection P of the first exhaust portion (exhaust portion 1241A, 124C) and the second exhaust portion (exhaust portion 1241B). Figure 2 As shown, the second exhaust portion (exhaust portion 1241B) is formed on its top surface, and the planar portion 1243 is located at the intersection P of the first exhaust portion (exhaust portion 1241A, 124C) and the second exhaust portion (exhaust portion 1241B). Figure 5 The bottom surface of the second exhaust section (exhaust section 1241B) is shown.

[0048] Since the first exhaust section (exhaust section 1241A, 124C) and the second exhaust section (exhaust section 1241B) extend in different directions, their intersection P is prone to large shape changes during thermal expansion, leading to increased stress. As mentioned above, forming a planar portion 1243 at the intersection P can suppress stress concentration and avoid excessive stress at the intersection P.

[0049] Figure 6 yes Figure 3 A partially enlarged schematic diagram of the exhaust channel and water jacket. Please refer to... Figure 6 Specifically, in this embodiment, the water jacket 130 and the exhaust passage 124 are at least partially integrated together to form the cylinder wall 112 of the cylinder structure 100. The water jacket 130 and the exhaust passage 124 respectively form two surfaces of the cylinder wall 112 (represented by reference surfaces S4 and S5, respectively). Cooling water flows along the water jacket 130 above the surface of the water jacket 130 (represented by reference surface S5), and exhaust gas flows along the exhaust passage 124 below the surface of the exhaust passage 124 (represented by reference surface S4). The texture is formed on both surfaces (represented by reference surfaces S4 and S5, respectively). Specifically, the texture includes a recessed structure T1 formed on the surface of the exhaust passage 124 (represented by reference surface S4) and recessed relative to reference surface S4, and a protruding structure T2 formed on the surface of the water jacket 130 (represented by reference surface S5) and protruding relative to reference surface S5. Adjacent protruding structures T2 are aligned with each other. Therefore, the heat dissipation area of ​​the cylinder wall can be further increased to improve heat dissipation efficiency and effectively reduce exhaust temperature. This is understandable. Figure 6 The cylinder wall 112 shown is in Figure 1 , Figure 2 and Figure 5 Not shown, Figure 1 , Figure 2 and Figure 5 The exhaust passage 124 shown is the portion of the exhaust passage 124 surrounded by the cylinder wall 112.

[0050] Please refer to Figure 6 The recessed structure T1 of the surface of the exhaust channel 124 (represented by reference surface S4) is, for example, a vortex-shaped texture, which can thin the temperature boundary layer and reduce the exhaust temperature. In addition, the protruding structure T2 of the surface of the water jacket 130 (represented by reference surface S5) forms a wave-shaped texture, which can increase the heat dissipation area of ​​the water jacket 130 to further improve heat dissipation efficiency and effectively reduce the exhaust temperature.

[0051] Figure 7 yes Figure 3 A cross-sectional view of the water jacket along line II. Figure 8 yes Figure 3 A cross-sectional view of the water jacket along line II-II. The water jacket 130 of this embodiment is as follows... Figure 8The water jacket 130 has a cooling water inlet 132 and a cooling water outlet 134, thus the water jacket 130 has a cooling water flow direction D from the cooling water inlet 132 to the cooling water outlet 134. The wavy texture formed by the protruding structures T2 of the water jacket 130 is as follows: Figure 7 and Figure 8 The pattern shown can be considered as multiple straight lines perpendicular to the cooling water flow direction D. In other embodiments, the pattern may take other suitable forms, and this invention is not limited thereto.

[0052] In summary, in the cylinder structure of this invention, the exhaust passage has textured surfaces on the top and bottom surfaces of the exhaust section and the exhaust collection section. Therefore, the heat dissipation area of ​​the exhaust passage can be increased without increasing its size, thereby improving its heat dissipation efficiency. Consequently, the cylinder structure of this invention can effectively reduce exhaust temperature.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cylinder structure, characterized in that, include: Multiple combustion chambers are arranged along the cylinder bank; as well as Cylinder head, has exhaust passage, The exhaust passage includes multiple exhaust sections and an exhaust collection section. The multiple exhaust sections are connected to the multiple combustion chambers, and the exhaust collection section is located at the center of the cylinder structure. The multiple exhaust sections converge at the exhaust collection section. The cylinder structure also includes a water jacket that covers the exhaust passage. The water jacket and the exhaust passage form the cylinder wall, and the cylinder wall has multiple aligned textures. The texture is formed at least on the top surface of the plurality of exhaust sections, the bottom surface of the plurality of exhaust sections, the top surface of the exhaust collection section, and the bottom surface of the exhaust collection section.

2. The cylinder structure according to claim 1, characterized in that, The plurality of exhaust sections includes at least one first exhaust section and a second exhaust section, wherein the length of the at least one first exhaust section extending from the exhaust collection section is greater than the length of the second exhaust section extending from the exhaust collection section. The exhaust passage has a planar portion, which is formed at least on the top surface of the second exhaust portion and the bottom surface of the second exhaust portion at the intersection of the at least one first exhaust portion and the second exhaust portion.

3. The cylinder structure according to claim 1, characterized in that, The water jacket and the exhaust channel respectively form the two surfaces of the cylinder wall, and the texture is formed on the two surfaces.

4. The cylinder structure according to claim 3, characterized in that, The texture of the exhaust channel is a vortex-shaped texture.

5. The cylinder structure according to claim 3, characterized in that, The texture of the water jacket is a wavy texture, which includes multiple straight lines perpendicular to the cooling water flow direction of the water jacket.

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