Cylinder cover and engine

Abstract

The invention relates to a cylinder cover and an engine. The cylinder cover comprises a bottom plate, a plurality of valve holes are formed in the bottom plate at intervals, and a nose bridge area water channel is formed between every two adjacent valve holes in one side of the bottom plate; the protrusion is located in the nose bridge area water channel and fixedly connected with the bottom plate, the protrusion extends along the side wall of the bottom plate, and an included angle is formed between the extending direction of the protrusion and the extending direction of the nose bridge area water channel. According to the air cylinder cover and the engine, the protrusions are arranged in the nose bridge area water channel, the effective heat exchange area can be increased under the same cooling water flow and other boundary conditions, the heat exchange coefficient of the bottom plate is increased accordingly, turbulent flow can be formed in the nose bridge area water channel easily through the protrusions, and therefore the reliability of the air cylinder cover can be improved.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a cylinder head and an engine. Background Art

[0002] Currently, engines (such as diesel engines) are developing towards high power density, and their specific power continues to increase. This trend directly leads to a significant increase in the thermal load of the engine's cylinder head, which in turn increases the risk of thermal fatigue failure.

[0003] In the internal structure of the cylinder head, especially in the nose area between the valves, the risk of thermal load and thermal fatigue failure is particularly significant. How to improve the heat transfer efficiency of the nose area to enhance the reliability of the cylinder head has become an urgent problem to be solved. Summary of the invention

[0004] Based on this, it is necessary to provide a cylinder head and an engine to address the risk of thermal load and thermal fatigue failure in the nose bridge area.

[0005] The present application provides a cylinder head, comprising: a base plate, on which a plurality of valve holes are arranged at intervals, and a nose bridge area water channel is formed on one side of the base plate between adjacent valve holes; a protrusion, located in the nose bridge area water channel and fixedly connected to the base plate, the protrusion extends along the side wall of the base plate, and an angle is formed between the extension direction of the protrusion and the extension direction of the nose bridge area water channel.

[0006] According to one embodiment of the present application, there are multiple protrusions in the water channel in the bridge of nose area, and at least some of the multiple protrusions located in the water channel in the bridge of nose area are arranged in parallel and spaced apart.

[0007] According to one embodiment of the present application, the protrusion includes at least one first constituent part and at least one second constituent part, and the first constituent part and the second constituent part are located in the same water channel of the bridge of the nose area; an angle is formed between the extension direction of the first constituent part and the extension direction of the water channel of the bridge of the nose area, and between the extension direction of the second constituent part and the extension direction of the water channel of the bridge of the nose area, and an angle is formed between the extension direction of the first constituent part and the extension direction of the second constituent part.

[0008] According to one embodiment of the present application, there are multiple first constituent parts, and the multiple first constituent parts are arranged in sequence along the extension direction of the water channel in the bridge of the nose area, and / or there are multiple second constituent parts, and the multiple second constituent parts are arranged in sequence along the extension direction of the water channel in the bridge of the nose area.

[0009] According to one embodiment of the present application, the plurality of first constituent parts and the plurality of second constituent parts are alternately arranged in sequence along the extension direction of the water channel in the bridge of the nose area, or the plurality of first constituent parts and the plurality of second constituent parts are arranged in a direction perpendicular to the extension direction of the water channel in the bridge of the nose area.

[0010] According to one embodiment of the present application, between any adjacent protrusions among the plurality of protrusions, the height of one of the protrusions in the direction perpendicular to the side wall of the base plate is greater than the height of another part of the protrusions in the direction perpendicular to the side wall of the base plate.

[0011] According to one embodiment of the present application, the height of the protrusion in a direction perpendicular to the side wall of the bottom plate is 3 mm-5 mm.

[0012] According to one embodiment of the present application, the angle between the extension direction of the protrusion and the extension direction of the water channel in the bridge of the nose area is 85°-90°; or, the angle between the extension direction of the protrusion and the extension direction of the water channel in the bridge of the nose area is 40°-50°.

[0013] According to one embodiment of the present application, the base plate and the protrusion are integrally formed.

[0014] The present application also provides an engine, comprising the cylinder head of the above embodiment.

[0015] The above-mentioned cylinder head and engine, by arranging a protrusion in the water channel of the nose bridge area, can increase the effective heat exchange area under the same cooling water flow and other boundary conditions, thereby improving the heat transfer coefficient of the base plate, and the protrusion also helps to form turbulence in the water channel of the nose bridge area, thereby improving the reliability of the cylinder head. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG. 1 is a top view of a cylinder head provided in one embodiment of the present application.

[0017] FIG. 2 is a top view showing a protrusion arrangement structure in a cylinder head provided in an embodiment of the present application.

[0018] Figure 3 A top view showing a protrusion arrangement structure in a cylinder head provided in another embodiment of the present application.

[0019] Figure 4 A cross-sectional view showing a protrusion arrangement structure in a cylinder head provided in one embodiment of the present application.

[0020] Figure 5 A top view showing a protrusion arrangement structure in a cylinder head provided in another embodiment of the present application.

[0021] Figure 6A top view showing a protrusion arrangement structure in a cylinder head provided in another embodiment of the present application.

[0022] 10. Bottom plate; 11. Valve hole; 12. Water channel in the nose bridge area;

[0023] 20. protrusion; 21. first component; 22. second component. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0025] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0026] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0028] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0030] Referring to FIG. 1 , FIG. 1 shows a top view of a cylinder head in an embodiment of the present application. The cylinder head provided in this embodiment includes a bottom plate 10. The bottom plate 10 is a part of the cylinder head, forming a bottom plane of the cylinder head, and is usually connected to the engine cylinder block. The bottom plate 10 not only supports components such as the intake valve and the exhaust valve, but also participates in forming a part of the structure of the cooling system.

[0031] The base plate 10 is provided with a plurality of valve holes 11 at intervals. The valve holes 11 refer to holes reserved for the intake valves and exhaust valves on the cylinder head. The valve is a valve that controls the fuel mixture to enter the combustion chamber and the exhaust gas to be discharged. The design of the valve hole 11 is crucial to ensure the correct positioning and movement of the valve. A nose bridge area water channel 12 is formed on one side of the base plate 10 between adjacent valve holes 11, wherein the nose bridge area refers to the narrow area between the two valves, which is often the place in the cylinder head most prone to thermal stress. The nose bridge area water channel 12 is a cooling channel in this area, which is used to guide the coolant to flow through, help reduce the temperature of this part, and prevent material fatigue or other heat-related failures caused by overheating.

[0032] Combined with Figure 2 to Figure 6The cylinder head of this embodiment further includes a protrusion 20, which is located in the water channel 12 in the bridge of nose area. The protrusion 20 is fixedly connected to the bottom plate 10, and an angle is formed between the extension direction of the protrusion 20 and the extension direction of the water channel 12 in the bridge of nose area. By providing the protrusion 20 structure, the effective heat exchange area can be increased under the same cooling water flow and other boundary conditions, thereby improving the heat exchange coefficient of the bottom plate 10, and the protrusion 20 also helps to form turbulence in the water channel 12 in the bridge of nose area, thereby improving the reliability of the cylinder head.

[0033] The protrusion 20 of this embodiment can be set to extend along the side wall of the bottom plate 10, that is, to extend along the bottom of the water channel 12 in the bridge of nose area, or it can be set to extend along the side wall of the water channel 12 in the bridge of nose area. Preferably, the protrusion 20 includes a first part extending along the water channel 12 in the bridge of nose area and a second part extending along the side wall of the water channel 12 in the bridge of nose area, so as to achieve a better heat exchange effect.

[0034] In some embodiments of the present application, the angle between the extension direction of the protrusion 20 and the extension direction of the water channel 12 in the bridge of the nose is 85°-90°, for example, 85°, 88° or 90°; or, the angle between the extension direction of the protrusion 20 and the extension direction of the water channel 12 in the bridge of the nose is 40°-50°, for example, 43°, 45°, 48° or 50°.

[0035] In this embodiment, there are two main options for the angle between the extension direction of the protrusion 20 and the extension direction of the nose bridge area water channel 12:

[0036] 1. Vertical angle: In conjunction with FIG. 2, FIG. 2 is a top view of the protrusion arrangement structure in the cylinder head provided by an embodiment of the present application. The arrow direction in FIG. 2 indicates the direction of water flow. In addition, it should be noted that the curve in the direction of water flow indicates the ups and downs of water flow. The protrusion 20 is perpendicular to (or approximately perpendicular to) the extension direction of the water channel. The specific angle can be 85°, 88° or 90°. This can make the coolant produce more turbulent effects when flowing through the nose bridge area, increase the friction and contact area between the coolant and the surface of the bottom plate 10, and thus improve the heat exchange efficiency;

[0037] 2. Angle of inclination: combined Figure 3 , Figure 3 A top view showing a protrusion arrangement structure in a cylinder head provided in an embodiment of the present application, Figure 3The arrow direction in the figure indicates the direction of water flow. It should be noted that the curve in the direction of water flow indicates the ups and downs of the water flow. The angle between the extension direction of the protrusion 20 and the extension direction of the water channel 12 in the bridge of the nose is set to be between 40° and 50°. The specific angle can be 43°, 45°, 48° or 50°. The contact area between the coolant and the bottom plate 10 can also be increased, and the flow path of the coolant can also be optimized to form a more uniform coverage in the bridge of the nose to avoid overcooling or overheating in certain areas.

[0038] These two different angles can be flexibly configured according to the actual application requirements and the characteristics of the engine working environment. For example, when the heat exchange efficiency needs to be maximized, a closer vertical angle (such as 85°-90°) can be used; when the flow smoothness and other design constraints need to be taken into account, an inclined angle (such as 40°-50°) can be used. This can ensure sufficient cooling effect while meeting the requirements of structural stability and manufacturing process.

[0039] In some embodiments of the present application, the base plate 10 and the protrusion 20 are integrally formed, specifically, the base plate 10 and the protrusion 20 are integrally cast. Integral molding can ensure that the base plate 10 and the protrusion 20 have good bonding force, reduce potential defects caused by assembly, and enhance the strength of the overall structure. No additional machining steps are required to install the protrusion 20, reducing manufacturing complexity and cost. By casting the protrusion 20, the height and other geometric parameters of the protrusion 20 can be accurately controlled, thereby optimizing the flow characteristics of the coolant, increasing the heat exchange area, and improving the cooling efficiency of the cylinder head. Since the protrusion 20 and the base plate 10 are integrally formed, there is no problem of the protrusion 20 loosening or falling off after long-term use, thereby improving the long-term reliability of the system. The height of the protrusion 20 can be adjusted according to the needs of the actual casting process, making the design more flexible and able to adapt to the specific requirements of different models of engines.

[0040] In some embodiments of the present application, the side of the protrusion 20 away from the bottom of the water channel 12 in the bridge of the nose area has a curved surface, so that the protrusion 20 is a semi-cylindrical or semi-cylindrical strip structure, which increases the heat exchange area while reducing the obstruction to the cooling water flow, further improving the heat exchange efficiency.

[0041] In some embodiments of the present application, there are multiple protrusions 20 in the nose bridge area water channel 12, and at least some of the multiple protrusions 20 in the nose bridge area water channel 12 are arranged in parallel and spaced apart. The arrangement direction of the multiple protrusions 20 arranged in parallel and spaced apart is parallel to the flow direction of the cooling water flow of the nose bridge area water channel 12 (i.e., the extension direction of the nose bridge area water channel 12), and the angle between the extension direction of the multiple protrusions 20 arranged in parallel and spaced apart and the flow direction of the cooling water flow of the nose bridge area water channel 12 (i.e., the extension direction of the nose bridge area water channel 12) is equal.

[0042] In this embodiment, a plurality of protrusions 20 arranged in parallel and at intervals can form a wavy structure at a position on the bottom plate 10 located in the water channel 12 in the bridge of the nose area, which is beneficial to further increase the heat exchange area and improve the heat exchange efficiency. In addition, the parallel and spaced arrangement of the plurality of protrusions 20 has the advantage of low processing difficulty. The structure of the plurality of protrusions 20 can also increase the structural strength of the cylinder head at the bridge of the nose area water channel 12, thereby further enhancing the reliability of the cylinder head.

[0043] Combination Figure 4 Optionally, the height h of the protrusion 20 in the direction perpendicular to the side wall of the base plate 10 is 3mm-5mm, for example, the height h of the protrusion 20 in the direction perpendicular to the side wall of the base plate 10 is 3mm, 4.5mm or 5mm. The height of the protrusion 20 is an important parameter, which directly affects the surface area of ​​the coolant in contact with the base plate 10 and the fluid dynamics characteristics. A protrusion 20 that is too high may increase the resistance to the flow of the coolant and affect the flow characteristics of the fluid, while a lower height may not be sufficient to significantly improve the heat exchange efficiency. Therefore, the height range of the protrusion 20 in the direction perpendicular to the side wall of the base plate 10 is 3mm-5mm, which can increase the heat exchange area without excessively interfering with the flow of the coolant. This height range is also based on the feasibility of the manufacturing process to ensure that the required protrusion 20 structure can be accurately formed during the production process without increasing excessive manufacturing difficulty or cost.

[0044] Combination Figure 5 and Figure 6 In some embodiments of the present application, the protrusion 20 includes at least one first constituent part 21 and at least one second constituent part 22, and the first constituent part 21 and the second constituent part 22 are located in the same nose bridge area water channel 12; an angle is formed between the extension direction of the first constituent part 21 and the extension direction of the nose bridge area water channel 12, and an angle is formed between the extension direction of the second constituent part 22 and the extension direction of the nose bridge area water channel 12, and an angle is formed between the extension direction of the first constituent part 21 and the extension direction of the second constituent part 22.

[0045] Specifically, the first component 21 and the second component 22 are both located in the same nose bridge area water channel 12, and the angle formed between the extension direction of each protrusion 20 and the extension direction of the nose bridge area water channel 12 can be a vertical (such as 90°) or inclined (such as 45°) angle, and an angle is also formed between the extension direction of the first component 21 and the extension direction of the second component 22. The angle between the extension direction of the first component 21 and the extension direction of the second component 22 is not specifically limited here. The combination of different protrusions 20 can change the flow pattern of the coolant, promote a more uniform temperature distribution, avoid local overheating, and improve the reliability of the cylinder head. The design of the combination of the first component 21 and the second component 22 can enhance the rigidity of the bottom plate 10 and prevent deformation caused by high temperature. In addition, the angle and position of each protrusion 20 can be adjusted according to the actual cooling requirements to achieve the best cooling effect. For example, the angle of the first component 21 and the second component 22 can be adjusted according to different engine operating conditions to adapt to different heat load conditions. Furthermore, since the protrusion 20 is integrally formed with the base plate 10 by casting, no additional manufacturing complexity and cost are added.

[0046] Further, the number of the first component 21 is multiple, and the multiple first component 21 is sequentially arranged along the extension direction of the nose bridge area water channel 12, and / or the number of the second component 22 is multiple, and the multiple second component 22 is sequentially arranged along the extension direction of the nose bridge area water channel 12. Preferably, the number of the first component 21 and the second component 22 are both multiple, and the multiple first component 21 and the multiple second component 22 are sequentially arranged along the extension direction of the nose bridge area water channel 12.

[0047] Different arrangements of the protrusions 20 can change the flow characteristics of the coolant, causing the coolant to form a more complex flow path in the nose bridge area, which helps to improve the heat exchange efficiency and prevent the coolant from flowing too fast in certain areas and failing to fully absorb heat.

[0048] Combination Figure 5 In one of the optional modes, the plurality of first constituent parts 21 and the plurality of second constituent parts 22 are alternately arranged in sequence along the extension direction of the water channel 12 in the bridge of nose area. In this optional mode, the plurality of first constituent parts 21 and the plurality of second constituent parts 22 are located in the same row. In the water channel 12 in the bridge of nose area, the first constituent parts 21 and the second constituent parts 22 are staggered with each other, and a first constituent part 21 is followed by a second constituent part 22, and the arrangement is cyclical in this way. Such a design can make the coolant encounter an alternating flow direction when flowing through the bridge of nose area, thereby increasing the contact opportunity between the coolant and the bottom plate 10, thereby improving the heat exchange efficiency.

[0049] Combination Figure 6In another optional manner, the plurality of first components 21 and the plurality of second components 22 are arranged in a direction perpendicular to the extension direction of the nose bridge area water channel 12. In this optional manner, the plurality of first components 21 and the plurality of second components 22 are arranged in a row, and the plurality of first components 21 and the plurality of second components 22 are arranged in a direction perpendicular to the extension direction of the nose bridge area water channel 12. This arrangement can further change the flow characteristics of the coolant, promote the mixing of the coolant through obstacles in the vertical direction, increase the contact time between the coolant and the surface of the protrusion 20, and thus improve the cooling effect.

[0050] The choice of the above two arrangements depends on the cooling effect to be achieved in the actual application and the specific engine design requirements. The alternating arrangement is suitable for situations where disturbance needs to be increased in the flow direction to promote the contact between the coolant and the protrusion 20; while the vertical arrangement is suitable for situations where the mixing of the coolant needs to be increased to increase the heat exchange area. Through these two different arrangements, the cooling requirements of different engines can be better met and the reliability of the cylinder head can be improved.

[0051] Of course, in some other embodiments, the same nose bridge area water channel 12 or different nose bridge area water channels 12 may adopt the above two arrangements at the same time, or may adopt the above two arrangements separately.

[0052] In some embodiments of the present application, between any adjacent protrusions 20 among the plurality of protrusions 20, the height of one protrusion 20 in the direction perpendicular to the side wall of the bottom plate 10 is greater than the height of another part of the protrusions 20 in the direction perpendicular to the side wall of the bottom plate 10. For example, when the plurality of first components 21 and the plurality of second components 22 are alternately arranged in sequence along the extension direction of the nose bridge water channel 12, the height of the first component 21 in the direction perpendicular to the side wall of the bottom plate 10 is greater than the height of the second component 22 in the direction perpendicular to the side wall of the bottom plate 10.

[0053] The protrusions 20 of different heights can cause more disturbances in the flow of the coolant, forming a turbulent effect, which helps to enhance heat exchange. In addition, the protrusions 20 of different heights can change the flow path of the coolant, so that the coolant is more evenly distributed in the nose bridge area, avoiding cooling dead corners. By adjusting the height of the protrusions 20 at different positions, the design can also be optimized according to the heat load characteristics of different parts of the nose bridge area of ​​the cylinder head, achieving more targeted cooling.

[0054] It is worth noting that the heights of the multiple protrusions 20 in the nose bridge area water channel 12 are not limited to two types, and can also be three or even more, which can be flexibly selected according to actual heat exchange requirements.

[0055] FIG. 1 is a top view of a cylinder head provided in an embodiment of the present application. The arrow direction in FIG. 1 indicates the direction of water flow. It should also be noted that the curve in the direction of water flow indicates the ups and downs of the water flow. As shown in FIG. 1 , in some embodiments of the present application, the base plate 10 is provided with 4 valve holes 11 at intervals, and one side of the base plate 10 forms 4 bridge-of-nose water channels 12 between 4 adjacent valve holes 11. The 4 bridge-of-nose water channels 12 are arranged in a cross shape or approximately in a cross shape, and at least part of the 4 bridge-of-nose water channels 12 are provided with protrusions 20. Preferably, all 4 bridge-of-nose water channels 12 are provided with protrusions 20. The cooling water flow can flow from a direction perpendicular to the side wall of the base plate 10 to the center of the 4 bridge-of-nose water channels 12, and then be diverted to different directions through the 4 bridge-of-nose water channels 12.

[0056] An embodiment of the present application also provides an engine, comprising the above-mentioned cylinder head.

[0057] The engine of this embodiment can be divided into various types according to different uses and working principles, including but not limited to gasoline engines, diesel engines, gas turbines, electric motors, steam engines, jet engines, etc. In addition, the engine of this embodiment can also include other components such as a cylinder block, a piston, an intake valve, and an exhaust valve.

[0058] The engine of this embodiment can achieve the following advantages by adopting the above-mentioned improved cylinder head: improve cooling efficiency, by increasing the contact area between the coolant and the base plate 10, the heat exchange coefficient can be effectively improved, the temperature of the cylinder head can be reduced, the thermal stress can be reduced, and the reliability of the engine can be improved. Optimize fluid dynamics, the protrusions 20 of different heights can change the flow characteristics of the coolant, increase turbulence, optimize the distribution of the coolant, and ensure uniform cooling. The structure is simple, the protrusions 20 are formed by casting, and no additional machining steps are required, which simplifies the manufacturing process and reduces costs. Flexibility, different protrusion 20 arrangements can be selected according to actual structural conditions, and free combination applications can be achieved to meet different engine design requirements. Through the above design, the engine can still maintain a good working condition under the conditions of high power density and high heat load, extend the service life of the engine, and improve its operating efficiency.

[0059] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A cylinder head, characterized in that: include: A bottom plate is provided with a plurality of valve holes at intervals, and a nose bridge water channel is formed on one side of the bottom plate between adjacent valve holes; The protrusion is located in the water channel in the bridge of the nose area and is fixedly connected to the base plate. The protrusion extends along the side wall of the base plate, and an angle is formed between the extension direction of the protrusion and the extension direction of the water channel in the bridge of the nose area.

2. The cylinder head according to claim 1, characterized in that: There are multiple protrusions in the water channel in the bridge of nose area, and at least some of the multiple protrusions in the water channel in the bridge of nose area are arranged in parallel and spaced apart.

3. The cylinder head according to claim 2, characterized in that: The protrusion includes at least one first component and at least one second component, and the first component and the second component are located in the same water channel of the bridge of the nose; An angle is formed between the extension direction of the first component and the extension direction of the water channel in the bridge of the nose, and between the extension direction of the second component and the extension direction of the water channel in the bridge of the nose, and an angle is formed between the extension direction of the first component and the extension direction of the second component.

4. The cylinder head according to claim 3, characterized in that: There are multiple first components, and the multiple first components are arranged in sequence along the extension direction of the water channel in the bridge of the nose area, and / or there are multiple second components, and the multiple second components are arranged in sequence along the extension direction of the water channel in the bridge of the nose area.

5. The cylinder head according to claim 4, characterized in that: The plurality of first components and the plurality of second components are alternately arranged in sequence along the extension direction of the water channel in the bridge of the nose area, or the plurality of first components and the plurality of second components are arranged in a direction perpendicular to the extension direction of the water channel in the bridge of the nose area.

6. The cylinder head according to any one of claims 2 to 5, characterized in that: Between any adjacent protrusions among the plurality of protrusions, the height of one of the protrusions in the direction perpendicular to the side wall of the bottom plate is greater than the height of another part of the protrusions in the direction perpendicular to the side wall of the bottom plate.

7. The cylinder head according to any one of claims 1 to 5, characterized in that: The height of the protrusion in a direction perpendicular to the side wall of the bottom plate is 3 mm-5 mm.

8. The cylinder head according to any one of claims 1 to 5, characterized in that: The angle between the extension direction of the protrusion and the extension direction of the water channel in the bridge of the nose area is 85°-90°; Alternatively, the angle between the extension direction of the protrusion and the extension direction of the water channel in the bridge of the nose area is 40°-50°.

9. The cylinder head according to any one of claims 1 to 5, characterized in that: The bottom plate and the protrusion are integrally formed.

10. An engine, characterized in that: Comprising a cylinder head as claimed in any one of claims 1 to 9.

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