Cylinder head and engine

Abstract

The application relates to the engine technical field, and proposes a cylinder cover and an engine, which comprise a cylinder cover body and a first supporting rib. The cylinder cover body is provided with an intake camshaft mounting position and an exhaust camshaft mounting position which are oppositely arranged along the width direction of the cylinder cover body. Cam bearing holes are arranged on the length end plates of the cylinder cover body. The first supporting rib is arranged on at least one length end plate and is located below the cam bearing holes to support the cam bearing holes. At least one side of the first supporting rib is provided with an oil leakage via hole. In this way, on the one hand, the first supporting rib arranged on the cylinder cover body can reduce the probability of cracking and deformation of the cylinder cover, improve the stability and reliability, and can be adapted to high-heat-efficiency engines. On the other hand, the oil return difficulty of lubricating oil can be reduced, the lubricating effect on the camshaft can be improved, the probability of wear and deformation of the cylinder cover and internal components of the cylinder cover can be further reduced, and the working stability and reliability of the engine can be improved.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to a cylinder head and an engine. Background Technology

[0002] In related technologies, the thermal efficiency of engines is increasing day by day. However, the cylinder head of a high thermal efficiency engine needs to withstand greater mechanical and thermal loads, which leads to a higher probability of cylinder head cracking and deformation. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a cylinder head with higher structural strength, a lower probability of cracking and deformation, and improved lubricating oil return efficiency.

[0004] This application further proposes an engine employing the aforementioned cylinder head.

[0005] In a first aspect, this application proposes a cylinder head, comprising: a cylinder head body and a first support rib, wherein the cylinder head body has an intake camshaft mounting position and an exhaust camshaft mounting position disposed opposite to each other along its own width direction, and a cam bearing hole is provided on the length end plate of the cylinder head body; the first support rib is disposed on at least one of the length end plates and is located below the cam bearing hole to support the cam bearing hole, and an oil drain hole is provided on at least one side of the first support rib.

[0006] According to the embodiments of this application, the cylinder head, on the one hand, by providing a first support rib on the cylinder head body, can improve the structural strength of the cylinder head, improve the mechanical load and thermal load bearing capacity of the cylinder head, reduce the probability of the cylinder head cracking or deformation, improve stability and reliability, and can be adapted to high thermal efficiency engines. On the other hand, at least one side of the first support rib forms an oil drain hole, which can reduce the difficulty of lubricating oil return, improve the smoothness of oil return, improve the lubrication effect on the camshaft, and further reduce the probability of wear and deformation of the cylinder head and internal components, thereby improving the working stability and reliability of the engine.

[0007] According to some embodiments of this application, the cylinder head further includes: a longitudinal reinforcing rib, which is disposed on the upper end face of the cylinder head body and extends along the length direction of the cylinder head body, located on the width centerline of the cylinder head body, and at least part of the cross-sectional area gradually decreases in the direction away from the upper end face of the cylinder head body.

[0008] According to some embodiments of this application, a second support rib is provided below the longitudinal reinforcing rib. The second support rib is located between adjacent cylinders and extends from the top surface of the oil sump inside the cylinder head body to the bottom surface.

[0009] According to some embodiments of this application, the longitudinal reinforcing ribs are connected to the bottom surface of the oil sump by support columns spaced apart along the length of the cylinder head body, and support ribs are provided around the support columns.

[0010] According to some embodiments of this application, the support rib includes a transverse support rib and a longitudinal support rib, wherein the cross-sectional area of ​​both the longitudinal support rib and the transverse support rib gradually decreases in at least a portion in the direction away from the longitudinal stiffener, and the longitudinal stiffener is connected to the second support rib.

[0011] According to some embodiments of this application, the cylinder head further includes: transverse reinforcing ribs, which extend along the width direction and are spaced apart in the length direction, each of the transverse reinforcing ribs being connected to at least one fixing post for assembling the cylinder head, and at least a portion of the transverse reinforcing ribs being spaced apart from the bottom surface of the oil sump inside the cylinder head body.

[0012] According to some embodiments of this application, a third supporting rib is provided around the fixed column, the third supporting rib is spaced apart from the transverse reinforcing rib, and the cross-sectional area of ​​the third supporting rib gradually increases in the direction toward the bottom of the oil tank.

[0013] According to some embodiments of this application, the cylinder head body is further provided with an intake-side oil return hole and an exhaust-side oil return hole, and the intake-side oil return hole and the exhaust-side oil return hole are arranged in pairs corresponding to the cylinders. The intake-side oil return hole and the exhaust-side oil return hole are both connected to the oil sump inside the cylinder head body, and at the mounting angle, the lowest point of the cylinder head is located at the length end plate of the cylinder head body at the other end.

[0014] According to some embodiments of this application, an oil return channel is provided between the intake-side oil return hole and the bottom surface of the oil sump, and between the exhaust-side oil return hole and the bottom surface of the oil sump. Each exhaust-side oil return hole and each intake-side oil return hole has two corresponding oil return channels. The two oil return channels gradually move away from each other in the direction away from their corresponding exhaust-side oil return holes, and the two oil return channels gradually move away from each other in the direction away from their corresponding intake-side oil return holes.

[0015] Secondly, this application proposes an engine comprising: the cylinder head described in the above embodiments.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a partial schematic diagram of a cylinder head according to an embodiment of this application; Figure 2 This is a cross-sectional view of the cylinder head from one angle according to an embodiment of this application; Figure 3 This is a cross-sectional view of the cylinder head according to an embodiment of this application from another angle; Figure 4 This is a schematic diagram of the oil sump and intake-side oil return hole of the cylinder head according to an embodiment of this application; Figure 5 This is a cross-sectional view of the cylinder head according to an embodiment of this application from another angle.

[0018] Figure label: Cylinder head 100, Cylinder head body 10, camshaft bearing bore 11, oil sump 12, intake side oil return hole 13, exhaust side oil return hole 14, oil return channel 15, retaining column 16. First supporting rib 20, longitudinal reinforcing rib 30, second supporting rib 40, supporting column 50, transverse supporting rib 61, longitudinal supporting rib 62, transverse reinforcing rib 70, third supporting rib 80. Oil drain hole a, hollow area b, Length direction X, width direction Y. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0021] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0024] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0027] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0028] In this application, "multiple" means two or more (including two).

[0029] In related technologies, as engine thermal efficiency improves, the efficiency requirements for converting thermal energy into mechanical energy become higher. In order to improve the conversion efficiency, the combustion process of the engine needs to be close to an isochoric heating process, which requires the combustion duration of the compression engine.

[0030] Ideally, combustion should complete the compression phase during the combustion duration, occurring the instant the piston reaches top dead center. This adjustment leads to an increase in the maximum combustion pressure within the engine cylinder. Simultaneously, as the combustion speed increases, the movement of the combustion gases becomes more vigorous, resulting in a greater velocity of the combustion gases relative to the engine combustion chamber walls. This, in turn, increases the heat transfer coefficient of the combustion chamber walls, leading to a rise in combustion chamber wall temperature and increased thermal stress. As mechanical loads (due to combustion pressure) and thermal loads (due to temperature) increase, the cylinder head's risk of cracking and deformation also increases.

[0031] At the same time, as the vehicle's climbing angle increases, the lubricating oil in the cylinder head will also experience problems with poor oil return. This is especially true for diesel engines, where the problem of poor oil return in the cylinder head becomes more severe at larger climbing angles.

[0032] Based on this, this application proposes a cylinder head. On the one hand, by setting a first support rib on the cylinder head body and supporting the camshaft bearing hole on the cylinder head through the first support rib, the structural strength of the cylinder head can be improved, the mechanical load and thermal load bearing capacity of the cylinder head can be improved, the probability of the cylinder head cracking and deformation can be reduced, and the stability and reliability can be improved. On the other hand, at least one side of the first support rib forms an oil drain hole, which can reduce the difficulty of lubricating oil return, improve the smoothness of oil return, improve the lubrication effect on the camshaft, and further reduce the probability of cylinder head wear and deformation, thereby improving the working stability and reliability of the engine.

[0033] The following is for reference. Figures 1-5 The cylinder head 100 and the engine according to an embodiment of the present invention are described.

[0034] like Figure 1As shown, this application proposes a cylinder head 100, including: a cylinder head body 10 and a first support rib 20. The cylinder head body 10 has an intake camshaft mounting position and an exhaust camshaft mounting position arranged opposite to each other along its own width direction. A cam bearing hole 11 is provided on the long end plate of the cylinder head body 10. The first support rib 20 is provided on at least one long end plate and is located below the cam bearing hole 11 to support the cam bearing hole 11. An oil drain hole a is provided on at least one side of the first support rib 20.

[0035] The cylinder head body 10 has an intake valve hole and an exhaust valve hole. The intake valve and exhaust valve are respectively installed inside the intake valve and exhaust valve. Correspondingly, the cylinder head body 10 has an intake camshaft mounting position and an exhaust camshaft mounting position, and the intake valve camshaft and exhaust valve camshaft are respectively installed on them. The intake valve camshaft and exhaust valve camshaft control the intake valve and exhaust valve of multiple cylinders to open and close at appropriate times. The cylinder head body 10 includes two length end plates arranged opposite each other at both ends of its length, two width side plates arranged opposite each other in the width direction, and a bottom plate. The length end plates, width side plates, and bottom plate define the inner cavity. The inner cavity can form structures such as an oil sump 12, an exhaust camshaft mounting position, an intake camshaft mounting position, a lubricating oil passage, a lubricating oil hole, a piston hole, an oil injection hole, and a cooling water jacket.

[0036] Specifically, at least one of the two end plates can be provided with a cam bearing hole 11 (e.g., an intake cam bearing hole or an exhaust cam bearing hole). The ends of the intake camshaft and exhaust camshaft are located within the cam bearing hole 11. A first support rib 20 is then provided below the cam bearing hole 11. When the camshaft (intake or exhaust camshaft) rotates at high speed, it transmits periodic radial forces to the cam bearing hole 11. Over time, this can easily lead to stress concentration at the edge of the cam bearing hole 11, and even cause local deformation of the cylinder head 100. The first support rib 20 can form a stable integral connection with the surrounding structure of the bearing hole and the cylinder head body 10, adding an extra support structure to the cam bearing hole 11 and enhancing the local strength and rigidity of the cam bearing hole 11 area. This effectively prevents deformation of the cam bearing hole 11 area of ​​the cylinder head 100, and also better withstands the impact force during camshaft operation, preventing wear, cracking, and other failures in the cam bearing hole 11, thereby extending the service life of the cylinder head 100.

[0037] Furthermore, by providing an oil drain hole a on at least one side of the first support rib 20, such as providing an oil drain hole a between two adjacent first support ribs 20, or providing an oil drain hole a on the side of adjacent first support ribs 20 away from each other, the lubricating oil can be discharged through the oil drain hole a, which can reduce the difficulty of lubricating oil discharge, make it easier for lubricating oil to be discharged from the cylinder head 100, improve the smoothness of oil return, and allow the camshaft and internal components of the cylinder head 100 to be more fully lubricated, reduce wear, thereby further extending the service life of the cylinder head 100 and its internal components, and improving the working stability and reliability of the engine.

[0038] According to the embodiments of this application, the cylinder head 100, on the one hand, by providing a first support rib 20 on the cylinder head body 10, can improve the structural strength of the cylinder head 100, improve the mechanical load and thermal load bearing capacity of the cylinder head 100, reduce the probability of the cylinder head 100 cracking or deforming, improve stability and reliability, and can be adapted to high thermal efficiency engines. On the other hand, at least one side of the first support rib 20 forms an oil drain hole a, which can reduce the difficulty of lubricating oil return, improve the smoothness of oil return, improve the lubrication effect on the camshaft, and further reduce the probability of wear and deformation of the cylinder head 100 and its internal components, thereby improving the working stability and reliability of the engine.

[0039] Combination Figure 1 and Figure 2 As shown, according to some embodiments of this application, the cylinder head 100 further includes: a longitudinal reinforcing rib 30, which is disposed on the upper end face of the cylinder head body 10 and extends along the length direction of the cylinder head body 10, located on the width centerline of the cylinder head body 10, and at least part of the cross-sectional area gradually decreases in the direction away from the upper end face of the cylinder head body 10.

[0040] Specifically, a longitudinal reinforcing rib 30 is provided between the exhaust camshaft mounting position and the intake camshaft mounting position. The two ends of the longitudinal reinforcing rib 30 are connected to two length end plates respectively. By providing the longitudinal reinforcing rib 30, the structural strength and rigidity of the cylinder head 100 are further improved, the probability of deformation and cracking when the cylinder head 100 is subjected to large mechanical and thermal loads is reduced, and the reliability and stability of the cylinder head 100 are further improved.

[0041] Furthermore, positioning the longitudinal stiffener 30 on the width centerline of the cylinder head body 10 can improve the stress distribution on the cylinder head 100, enhance the uniformity of stress distribution, and reduce the probability of stress concentration. At the same time, the cross-sectional area of ​​the longitudinal stiffener 30 gradually decreases in the direction away from the upper end face of the cylinder head body 10, such as by constructing a T-shape or frustum shape. This can further improve the structural strength and rigidity of the cylinder head 100, reduce the probability of interference between the longitudinal stiffener 30 and surrounding components, and improve reliability and stability.

[0042] like Figure 3 As shown, according to some embodiments of this application, a second support rib 40 is provided below the longitudinal reinforcing rib 30. The second support rib 40 is located between adjacent cylinders and extends from the top surface of the oil sump 12 inside the cylinder head body 10 to the bottom surface.

[0043] Specifically, the oil sump 12 inside the cylinder head body 10 is used to contain lubricating oil, thus having a top surface and a bottom surface opposite each other in the height direction. This allows the second support rib 40 to be located below the longitudinal reinforcing rib 30 and to support the longitudinal reinforcing rib 30. At the same time, the second support rib 40 extends from the bottom surface of the oil sump 12 to the top surface of the oil sump 12, which not only further supports the longitudinal reinforcing rib 30, but also forms a rigid structure with the longitudinal reinforcing rib 30 to further improve the structural strength and rigidity of the cylinder head 100. In addition, it can form a mechanical transmission path to effectively disperse the impact energy, improve the stress distribution of the cylinder head 100, and effectively reduce the probability of deformation and cracking of the cylinder head 100.

[0044] like Figure 1 , Figure 3 and Figure 5 As shown, according to some embodiments of this application, the longitudinal reinforcing rib 30 is connected to the bottom surface of the oil sump 12 by support columns 50 spaced apart in the length direction of the cylinder head body 10, and support ribs are provided on the periphery of the support columns 50.

[0045] Specifically, there are multiple support columns 50, which are spaced apart along the length of the cylinder head body 10. Multiple support ribs, such as two, three, or four, can be provided around the support columns 50 to support the longitudinal reinforcing ribs 30, thereby further improving the structural strength of the cylinder head 100.

[0046] like Figure 1 , Figure 3 and Figure 5 As shown, according to some embodiments of this application, the support rib includes: a transverse support rib 61 and a longitudinal support rib 62. Both the longitudinal support rib 62 and the transverse support rib 61 have at least a portion of their cross-sectional area gradually decreasing in the direction away from the longitudinal stiffener 30, and the longitudinal stiffener 30 is connected to the second support rib 40.

[0047] Specifically, each support rib can be constructed such that the cross-sectional area at the end connected to the longitudinal stiffener 30 is larger, while the cross-sectional area at the end extending to the bottom of the oil sump 12 is smaller, such as a Y-shaped cross-section. This improves the stability and reliability of the support column 50 within the cylinder head body 10 through the transverse support rib 61 and the longitudinal support rib 62, thereby further enhancing the structural strength of the cylinder head 100. At the same time, the longitudinal support rib 62 can be connected to the second support rib 40 located between adjacent cylinders, thereby achieving local structural reinforcement of the area where the oil injection holes are located on the cylinder head body 10 and preventing cracking in the area where the oil injection holes are located.

[0048] like Figure 2 and Figure 3 As shown, according to some embodiments of this application, the cylinder head 100 further includes: transverse reinforcing ribs 70, which extend along the width direction and are spaced apart in the length direction. Each transverse reinforcing rib 70 is connected to at least one fixing post 16 for assembling the cylinder head 100, and at least a portion of the transverse reinforcing rib 70 is spaced apart from the bottom surface of the oil sump 12 inside the cylinder head body 10.

[0049] Specifically, the cylinder head 100 is provided with a fixing post 16. The fixing post 16 can be used to assemble the cylinder head 100 onto the engine block by bolts passing through it. The transverse reinforcing rib 70 is connected to at least one fixing post 16, which can reduce the deformation of the cylinder head 100 after being subjected to axial force. At least a portion of the transverse reinforcing rib 70 is spaced apart from the bottom surface of the oil sump 12. The spaced area can form a hollow area b. Under the premise of ensuring the rigidity and structural strength of the cylinder head 100, the setting of the hollow area b can not only reduce the overall material usage of the cylinder head 100, reduce material costs, and improve the weight of the cylinder block, taking into account the design requirements of lightweighting, but also ensure the fluidity of lubricating oil in the oil sump 12, avoid the setting of the longitudinal reinforcing rib 30 from obstructing the lubricating oil in the oil sump 12, and ensure smooth oil return, so as to improve the lubrication effect on the internal components of the cylinder head 100, reduce the wear of the internal components of the cylinder head 100, and extend the service life of the cylinder head 100 and its internal components.

[0050] like Figure 2 As shown, according to some embodiments of this application, a third support rib 80 is provided around the fixed column 16. The third support rib 80 is spaced apart from the transverse reinforcing rib 70, and the cross-sectional area of ​​the third support rib 80 gradually increases in the direction toward the bottom surface of the oil tank 12.

[0051] Specifically, a third support rib 80 is provided around the fixed column 16. The third support rib 80 and the transverse reinforcing rib 70 are spaced apart, which can also form a mechanical transmission path, thereby dispersing the force, especially the bolt stress, so as to reduce the probability of deformation of cylinder head 100 or cracking in the area of ​​fixed column 16.

[0052] like Figure 2 As shown, according to some embodiments of this application, the cylinder head body 10 is also provided with an intake side oil return hole 13 and an exhaust side oil return hole 14, and the intake side oil return hole 13 and the exhaust side oil return hole 14 are arranged in pairs corresponding to the cylinders. The intake side oil return hole 13 and the exhaust side oil return hole 14 are both connected to the oil sump 12 inside the cylinder head body 10, and at the mounting angle, the lowest point of the cylinder head 100 is located at the length end plate of the cylinder head body 10 at the other end.

[0053] For example, if the cylinder head 100 is applied to a four-cylinder engine, it has four cylinders. For the four cylinders, four intake-side oil return holes 13 and four exhaust-side oil return holes 14 are provided on the cylinder head 100.

[0054] It should be noted that each cylinder is provided with a pair of intake-side oil return holes 13 and exhaust-side oil return holes 14. Compared with the prior art, the cylinder head 100 of this application has more oil return holes (at least one more intake-side oil return hole 13), which can make the unit area oil return rate of the cylinder head 100 of this application embodiment less than or equal to 0.03, which can meet the 70% off-road climbing requirements.

[0055] It is understood that the mounting angle referred to in the embodiments of this application refers to the installation angle when the cylinder head 100 is assembled into the engine compartment. Specifically, the exhaust side tilt angle is greater than 11° and the front end elevation angle of the cylinder head 100 in the length direction is greater than 5°, so that the lowest point of the cylinder head 100 is the rear end of the exhaust side, located on the long end plate at the rear end in the length direction. Correspondingly, the exhaust side oil return hole 14 can be the lowest point of the cylinder head 100 to improve oil return and facilitate the assembly of the cylinder head 100 in the engine compartment.

[0056] like Figure 4 As shown, according to some embodiments of this application, an oil return channel 15 is provided between the intake side oil return hole 13 and the bottom surface of the oil sump 12, and between the exhaust side oil return hole 14 and the bottom surface of the oil sump 12. Each exhaust side oil return hole 14 and each intake side oil return hole 13 has two corresponding oil return channels 15. The two oil return channels 15 gradually move away from each other in the direction away from their corresponding exhaust side oil return hole 14, and the two oil return channels 15 gradually move away from each other in the direction away from their corresponding intake side oil return hole 13.

[0057] In other words, each intake-side oil return hole 13 is connected to the lowest point of the bottom surface of the oil sump 12 through two oil return channels 15, and each exhaust-side oil return hole 14 is also connected to the lowest point of the bottom surface of the oil sump 12 through two oil return channels 15. Moreover, the two oil return channels 15 corresponding to each exhaust-side oil return hole 14 and the two oil return channels 15 corresponding to each intake-side oil return hole 13 are all Y-shaped as a whole, which can further guide the lubricating oil in the oil sump 12 to the oil return hole, improve the guiding effect of the lubricating oil, reduce the lubricating oil residue in the oil sump 12, and ensure smooth oil return.

[0058] It is understood that the cross-section of the oil return channel 15 can be square, circular, or various irregular shapes, and the oil return channel 15 can be cast, machined, etc. This application does not make specific limitations.

[0059] This application proposes an engine, including: the cylinder head 100 in the above embodiment.

[0060] According to the engine of the embodiment of this application, the cylinder head 100 described above has the following advantages: First, the cylinder head 100 has higher structural strength and can withstand higher mechanical and thermal loads, which can improve the thermal efficiency of the engine, improve the working stability of the engine, and extend the service life of the engine. Second, the cylinder head 100 has better lubricating oil return effect, which allows the engine to be installed in vehicles with high off-road requirements, and can further enrich the engine's application scenarios.

[0061] The cylinder head 100 and other components and operations of the engine according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cylinder head, characterized in that, include: The cylinder head body (10) has an intake camshaft mounting position and an exhaust camshaft mounting position arranged opposite to each other along its width direction. A cam bearing hole (11) is provided on the long end plate of the cylinder head body (10). The first support rib (20) is disposed on at least one of the length end plates and located below the cam bearing hole (11) to support the cam bearing hole (11), and at least one side of the first support rib (20) is provided with an oil drain hole (a).

2. The cylinder head according to claim 1, characterized in that, The cylinder head also includes a longitudinal reinforcing rib (30), which is disposed on the upper end face of the cylinder head body (10) and extends along the length direction of the cylinder head body (10), located on the width centerline of the cylinder head body (10), and at least part of the cross-sectional area gradually decreases in the direction away from the upper end face of the cylinder head body (10).

3. The cylinder head according to claim 2, characterized in that, A second support rib (40) is provided below the longitudinal reinforcing rib (30). The second support rib (40) is located between adjacent cylinders and extends from the top surface of the oil sump (12) inside the cylinder head body (10) to the bottom surface.

4. The cylinder head according to claim 3, characterized in that, The longitudinal reinforcing rib (30) is connected to the bottom surface of the oil sump (12) by support columns (50) spaced apart along the length of the cylinder head body (10), and support ribs are provided around the support columns (50).

5. The cylinder head according to claim 4, characterized in that, The support rib includes a transverse support rib (61) and a longitudinal support rib (62), wherein the cross-sectional area of ​​both the longitudinal support rib (62) and the transverse support rib (61) gradually decreases in the direction away from the longitudinal reinforcing rib (30), and the longitudinal reinforcing rib (30) is connected to the second support rib (40).

6. The cylinder head according to claim 1, characterized in that, The cylinder head further includes: a transverse reinforcing rib (70) extending along the width direction and spaced apart in the length direction, each of the transverse reinforcing ribs (70) being connected to at least one fixing post (16) for assembling the cylinder head, and at least a portion of the transverse reinforcing rib (70) being spaced apart from the bottom surface of the oil sump (12) inside the cylinder head body (10).

7. The cylinder head according to claim 6, characterized in that, The fixed column (16) is provided with a third support rib (80) around its periphery. The third support rib (80) is spaced apart from the transverse reinforcing rib (70), and the cross-sectional area of ​​the third support rib (80) gradually increases in the direction toward the bottom surface of the oil tank (12).

8. The cylinder head according to claim 1, characterized in that, The cylinder head body (10) is also provided with an intake side oil return hole (13) and an exhaust side oil return hole (14), and the intake side oil return hole (13) and the exhaust side oil return hole (14) are provided in pairs for corresponding cylinders. The intake side oil return hole (13) and the exhaust side oil return hole (14) are both connected to the oil sump (12) inside the cylinder head body (10), and at the mounting angle, the lowest point of the cylinder head is located at the length end plate of the cylinder head body (10) at the other end.

9. The cylinder head according to claim 8, characterized in that, Oil return channels (15) are provided between the intake side oil return hole (13) and the bottom surface of the oil sump (12), and between the exhaust side oil return hole (14) and the bottom surface of the oil sump (12). Each exhaust side oil return hole (14) and each intake side oil return hole (13) has two corresponding oil return channels (15). The two oil return channels (15) gradually move away from each other in the direction away from their corresponding exhaust side oil return hole (14), and the two oil return channels (15) gradually move away from each other in the direction away from their corresponding intake side oil return hole (13).

10. An engine, characterized in that, include: The cylinder head according to any one of claims 1-9.

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