cylinder head

Abstract

This utility model discloses a cylinder head. The cylinder head includes a cylinder head body and a partition plate. The cylinder head body has a first cylinder bore center, a second cylinder bore center, and a water jacket. Along a first direction, the water jacket is located between the first cylinder bore center and the second cylinder bore center. The partition plate divides the water jacket into an upper sub-water jacket and a lower sub-water jacket distributed along a second direction. A protrusion is provided on the side of the partition plate facing the upper sub-water jacket. This cylinder head has good cooling effect, high rigidity, and high reliability.

Description

Technical Field

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

[0002] The cylinder head is a critical component of an engine and an indispensable part of the combustion chamber. Clean air enters the combustion chamber through the cylinder head and mixes with fuel for compression ignition. During combustion, the cylinder head must withstand the high temperatures and pressures generated by combustion, making cylinder head cooling particularly important.

[0003] The water jacket, located inside the cylinder head, guides the flow of coolant, carrying away heat from the combustion chamber and its surroundings to prevent engine overheating. In existing technology, the water jacket is entirely smooth and without baffles, allowing coolant to flow directly through it to the outlet, preventing the cylinder head temperature from decreasing. Furthermore, the smooth surface of the water jacket results in poor baffle rigidity, leading to cylinder head deformation under stress over time, and consequently, abnormal engine operation. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] A cylinder head, comprising: A cylinder head body having a first cylinder bore center, a second cylinder bore center, and a water jacket, wherein the water jacket is located between the first cylinder bore center and the second cylinder bore center along a first direction; A partition divides the water jacket into an upper sub-water jacket and a lower sub-water jacket distributed along a second direction. The partition has a protrusion on the side facing the upper sub-water jacket. The second direction intersects with the first direction.

[0006] The cylinder head of this invention includes a cylinder head body and a partition plate. The partition plate divides the water jacket into an upper sub-water jacket and a lower sub-water jacket. A protrusion is provided on the side of the partition plate facing the upper sub-water jacket. This protrusion obstructs the flow of coolant, preventing it from flowing directly through the water jacket to the outlet, thus reducing the temperature of the cylinder head. Simultaneously, the protrusion on the partition plate also increases its rigidity, preventing deformation of the cylinder head due to stress after prolonged operation and improving engine reliability.

[0007] In some embodiments, the protrusion includes a first sub-protrusion and a second sub-protrusion, the cylinder head body has an intake valve guide hole and a first bolt hole, the first sub-protrusion is located between the intake valve guide hole and the first bolt hole, the cylinder head body has an exhaust valve guide hole and a second bolt hole, and the second sub-protrusion is located between the exhaust valve guide hole and the second bolt hole.

[0008] The system incorporates a first sub-protrusion and a second sub-protrusion. Since the area between the intake valve guide hole and the first bolt hole is a high stress concentration zone, placing the first sub-protrusion between these areas increases the effective wall thickness, disperses stress, and improves local stiffness. Similarly, since the area between the exhaust valve guide hole and the second bolt hole is also a high stress concentration zone, placing the second sub-protrusion between these areas increases the effective wall thickness, disperses stress, and improves local stiffness.

[0009] In some embodiments, the first sub-protrusion has a first center line, and the first sub-protrusion has a symmetrical structure along the first center line as an axis.

[0010] By setting the first sub-protrusion as an axisymmetric structure along the first center line, the local stiffness is symmetrical, which can reduce the maximum principal stress and avoid eccentric deformation.

[0011] In some embodiments, the first sub-protrusion has a first end, a second end opposite to the first end, and a first sidewall. The second end is connected to the partition. Along the direction from the first end to the second end, the width of the first sub-protrusion gradually increases, and the width of the second end is 25mm-35mm.

[0012] By setting the width of the first sub-protrusion to gradually increase along the direction from the first end to the second end, abrupt changes in stiffness at the end of the first sub-protrusion are avoided, and the load is also distributed, reducing the maximum principal stress. The width of the second end is set to 25mm-35mm, making the volume of the first sub-protrusion reasonable and moderate. This avoids the situation where the volume is too large, which would impede the flow of coolant too much, and the volume is too small, which would impede the flow of coolant too little and result in too low stiffness.

[0013] In some embodiments, a first rounded corner is provided at the connection between the first end and the first sidewall, and the radius of the first rounded corner is 5mm-10mm.

[0014] By setting a first fillet at the connection between the first end and the first sidewall, the stress distribution at the connection between the first end and the first sidewall can be optimized, and the cost can be reduced and the service life of the first sub-protrusion can be increased.

[0015] In some embodiments, a second rounded corner is provided at the connection between the first sidewall and the partition, and the radius of the second rounded corner is 5mm-10mm.

[0016] By setting a second fillet at the connection between the first sidewall and the partition, the stress distribution at the connection between the first sidewall and the partition can be optimized, and the cost can be reduced and the service life of the first sub-protrusion can be increased.

[0017] In some embodiments, the height of the first sub-protrusion is 5mm-30mm along the direction from the first end to the second end.

[0018] By setting the height of the first sub-protrusion to 5mm-30mm, the height of the first sub-protrusion is made reasonable and moderate, avoiding the problem of excessive height hindering the flow of coolant, and also avoiding the problem of insufficient height hindering the flow of coolant.

[0019] In some embodiments, the second sub-protrusion has a third end, a fourth end corresponding to the third end, and a second sidewall. The fourth end is connected to the partition. Along the direction from the third end to the fourth end, the width of the second sub-protrusion gradually increases, and the width of the fourth end is 30mm-40mm.

[0020] By setting the width of the second sub-protrusion to gradually increase from the third to the fourth end, abrupt changes in stiffness at the ends are avoided, and the load is distributed, reducing the maximum principal stress. The width at the fourth end is set to 30mm-40mm, ensuring the volume of the second sub-protrusion is appropriately moderate. This avoids an excessively large volume that would hinder coolant flow too much, or an excessively small volume that would result in insufficient resistance and low stiffness.

[0021] In some embodiments, the third end includes a first sub-end and a second sub-end connected to the first sub-end, the second sidewall includes a first sub-wall and a second sub-wall connected to the first sub-wall, a third rounded corner is provided at the connection between the first sub-end and the first sub-wall, the radius of the third rounded corner is 5mm-10mm, and a fourth rounded corner is provided at the connection between the second sub-end and the second sub-wall, the radius of the fourth rounded corner is 5mm-10mm.

[0022] By setting a third fillet at the connection between the first sub-end and the first sub-wall, the stress distribution at the connection can be optimized, costs can be reduced, and the service life of the second sub-protrusion can be increased. Similarly, by setting a fourth fillet at the connection between the second sub-end and the second sub-wall, the stress distribution at the connection can be optimized, costs can be reduced, and the service life of the second sub-protrusion can be increased.

[0023] In some embodiments, a fifth rounded corner is provided at the connection between the first sub-wall and the partition, the radius of the fifth rounded corner being 5mm-10mm, and a sixth rounded corner is provided at the connection between the second sub-wall and the partition, the radius of the sixth rounded corner being 5mm-10mm.

[0024] By setting a fifth fillet at the connection between the first sub-wall and the partition, the stress distribution at this connection can be optimized, costs can be reduced, and the service life of the second sub-protrusion can be increased. Similarly, by setting a sixth fillet at the connection between the second sub-wall and the partition, the stress distribution at this connection can be optimized, costs can be reduced, and the service life of the second sub-protrusion can be increased.

[0025] In some embodiments, the height of the second sub-protrusion is 5mm-35mm along the direction from the third end to the fourth end.

[0026] By setting the height of the second sub-protrusion to 5mm-35mm, the height of the second sub-protrusion is made reasonable and moderate, avoiding both excessive height, which would hinder the flow of coolant too much, and insufficient height, which would hinder the flow of coolant too little. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a cylinder head provided in one embodiment of the present invention; Figure 2 This is a cross-sectional view of a cylinder head provided in one embodiment of the present invention; Figure 3 yes Figure 2 A magnified view of part A in the middle; Figure 4 yes Figure 2 A magnified view of part B in the middle section.

[0029] Figure label: 1. Cylinder head body; 11. Center of first cylinder bore; 12. Center of second cylinder bore; 13. Water jacket; 131. Upper water jacket; 132. Lower water jacket; 14. Intake valve guide hole; 15. First bolt hole; 16. Exhaust valve guide hole; 17. Second bolt hole; 2. Partition; 3. Protrusion; 31. First sub-protrusion; 311. First end; 312. Second end; 313. First sidewall; 314. First rounded corner; 315. Second rounded corner; 32. Second sub-protrusion; 321. Third end; 3211. First sub-end; 3212. Second sub-end; 322. Fourth end; 323. Second sidewall; 3231. First sub-wall; 3232. Second sub-wall; 32321. First wall portion; 32322. Second wall portion; 32323. Third wall portion; 324. Third rounded corner; 325. Fourth rounded corner; 326. Fifth rounded corner; 327. Sixth rounded corner; 328. Seventh rounded corner; 329. Eighth rounded corner; L1, the width of the second end; L2, the width of the fourth end; R1, radius of the first rounded corner; R2, radius of the second rounded corner; R3, radius of the fifth rounded corner; R4, radius of the third rounded corner; R5, radius of the fourth rounded corner; R6, radius of the seventh rounded corner; R7, radius of the eighth rounded corner; R8, radius of the sixth rounded corner; h1, the height of the first sub-protrusion; h2, the height of the second sub-protrusion; α, the first included angle; β, the second included angle; γ, the third included angle; X, first direction; Y, the second direction. Detailed Implementation

[0030] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0031] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. The terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0032] A cylinder head includes a cylinder head body and a partition. The cylinder head body has a first cylinder bore center, a second cylinder bore center, and a water jacket. Along a first direction, the water jacket is located between the first cylinder bore center and the second cylinder bore center. The partition divides the water jacket into an upper sub-water jacket and a lower sub-water jacket distributed along a second direction, and the side of the partition facing the upper sub-water jacket has a protrusion.

[0033] The cylinder head of this invention includes a cylinder head body and a partition plate. The partition plate divides the water jacket into an upper sub-water jacket and a lower sub-water jacket. A protrusion is provided on the side of the partition plate facing the upper sub-water jacket. This protrusion obstructs the flow of coolant, preventing it from flowing directly through the water jacket to the outlet, thus reducing the temperature of the cylinder head. Simultaneously, the protrusion on the partition plate also increases its rigidity, preventing deformation of the cylinder head due to stress after prolonged operation and improving engine reliability.

[0034] like Figure 1 As shown, in some embodiments, the cylinder head includes a cylinder head body 1. The cylinder head body 1 has a first cylinder bore center 11 and a second cylinder bore center 12. The cylinder head body 1 also has an intake valve guide hole 14 and an exhaust valve guide hole 16. The cylinder head body 1 also has a first bolt hole 15 and a second bolt hole 17.

[0035] In some embodiments, the intake valve duct orifice 14 is a circular orifice. Of course, in other embodiments, the intake valve duct orifice 14 may also be an elliptical orifice.

[0036] In some embodiments, the exhaust valve guide hole 16 is a circular hole. Of course, in other embodiments, the exhaust valve guide hole 16 may also be an elliptical hole.

[0037] In some embodiments, the first bolt hole 15 is a circular hole. Of course, in other embodiments, the first bolt hole 15 may also be an elliptical hole.

[0038] In some embodiments, the second bolt hole 17 is a circular hole. Of course, in other embodiments, the second bolt hole 17 may also be an elliptical hole.

[0039] like Figure 2 As shown, in some embodiments, the cylinder head body 1 further includes a water jacket 13. The cylinder head also includes a partition 2. The partition 2 divides the water jacket 13 into an upper sub-water jacket 131 and a lower sub-water jacket 132 distributed along a second direction Y. A protrusion 3 is provided on the side of the partition 2 facing the upper sub-water jacket 131. The protrusion 3 includes a first sub-protrusion 31 and a second sub-protrusion 32.

[0040] like Figure 1 and Figure 2 As shown, in some embodiments, along the first direction X, the water jacket 13 is located between the center 11 of the first cylinder bore and the center 12 of the second cylinder bore. The first sub-protrusion 31 is located between the intake valve guide hole 14 and the first bolt hole 15. Since the area between the intake valve guide hole 14 and the first bolt hole 15 is a high stress concentration area, placing the first sub-protrusion 31 between the intake valve guide hole 14 and the first bolt hole 15 can increase the effective wall thickness, disperse stress, and improve local stiffness.

[0041] In some embodiments, the second sub-protrusion 32 is located between the exhaust valve guide hole 16 and the second bolt hole 17. Since the area between the exhaust valve guide hole 16 and the second bolt hole 17 is a high stress concentration area, placing the second sub-protrusion 323 between the exhaust valve guide hole 16 and the second bolt hole 17 can increase the effective wall thickness, disperse stress, and improve local stiffness.

[0042] In some embodiments, the first direction X intersects the second direction Y. Specifically, the first direction X is perpendicular to the second direction Y.

[0043] like Figure 2 and Figure 3 As shown, in some embodiments, the first sub-protrusion 31 has a first centerline, and the first sub-protrusion 31 is symmetrical about the first centerline. By setting the first sub-protrusion 31 as an axisymmetric structure along the first centerline, the local stiffness is symmetrical, which can reduce the maximum principal stress and avoid eccentric deformation.

[0044] In some embodiments, the first sub-protrusion 31 has a first end 311, a second end 312 opposite to the first end 311, and a first sidewall 313. The second end 312 is connected to the partition 2. Along the direction from the first end 311 to the second end 312, the width of the first sub-protrusion 31 gradually increases, and the width L1 of the second end is 25mm-35mm. By setting the width of the first sub-protrusion 31 to gradually increase along the direction from the first end 311 to the second end 312, a sudden change in stiffness at the end of the first sub-protrusion 31 is avoided, and the load can be distributed to reduce the maximum principal stress. The width L1 of the second end is set to 25mm-35mm, so that the volume of the first sub-protrusion 31 is reasonable and moderate, avoiding an excessively large volume that would hinder the flow of coolant too much, and also avoiding an excessively small volume that would hinder the flow of coolant too little and have too low stiffness.

[0045] For example, the width L1 of the second end can be 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm, 34mm, 35mm or any range of two of the above values.

[0046] In some embodiments, a first fillet 314 is provided at the connection between the first end 311 and the first sidewall 313, and the radius R1 of the first fillet is 5mm-10mm. By providing the first fillet 314 at the connection between the first end 311 and the first sidewall 313, the stress distribution at the connection between the first end 311 and the first sidewall 313 can be optimized, and the cost can be reduced and the service life of the first sub-protrusion 31 can be increased.

[0047] For example, the radius R1 of the first fillet can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm or any range of two of the above values.

[0048] In some embodiments, a second fillet 315 is provided at the connection between the first sidewall 313 and the partition 2, and the radius R2 of the second fillet is 5mm-10mm. By providing a second fillet 315 at the connection between the first sidewall 313 and the partition 2, the stress distribution at the connection between the first sidewall 313 and the partition 2 can be optimized, and the cost can be reduced and the service life of the first sub-protrusion 31 can be increased.

[0049] For example, the radius R2 of the second fillet can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm or any range of two of the above values.

[0050] In some embodiments, the height h1 of the first sub-protrusion along the direction from the first end 311 to the second end 312 is 5mm-30mm. By setting the height h1 of the first sub-protrusion to 5mm-30mm, the height h1 of the first sub-protrusion is reasonably moderate, avoiding excessive height which would hinder the flow of coolant too much, and also avoiding excessive height which would hinder the flow of coolant too little.

[0051] For example, the height h1 of the first sub-protrusion can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm or any range of two of the above values.

[0052] In some embodiments, on the axial section of the first sub-protrusion 313, one of the lines of intersection between the first sidewall 313 and the axial section of the first sub-protrusion 31 forms a first angle α with the first center line, and the degree of the first angle α is 10°-15°.

[0053] For example, the degree of the first included angle α can be 10°, 11°, 12°, 13°, 14°, 15° or any range of two of the above values.

[0054] like Figure 2 and Figure 4 As shown, in some embodiments, the second sub-protrusion 32 has a third end 321, a fourth end 322 corresponding to the third end 321, and a second sidewall 323. The fourth end 322 is connected to the partition 2. Along the direction from the third end 321 to the fourth end 322, the width of the second sub-protrusion 323 gradually increases, and the width L2 of the fourth end is 30mm-40mm. By setting the width of the second sub-protrusion 32 to gradually increase along the direction from the third end 321 to the fourth end 322, a sudden change in stiffness at the end of the second sub-protrusion 32 is avoided, and the load can be distributed to reduce the maximum principal stress. The width L2 of the fourth end is set to 30mm-40mm, making the volume of the second sub-protrusion 32 reasonable and moderate, avoiding an excessively large volume that would hinder the flow of coolant too much, and also avoiding an excessively small volume that would hinder the flow of coolant too little and have too low stiffness.

[0055] For example, the width L2 of the fourth end can be 30mm, 32mm, 34mm, 36mm, 38mm, 40mm or any range of two of the above values.

[0056] In some embodiments, the third end 321 includes a first sub-end 3211 and a second sub-end 3212 connected to the first sub-end 3211, and the second sidewall 323 includes a first sub-wall 3231 and a second sub-wall 3232 connected to the first sub-wall 3231. A third fillet 324 is provided at the connection between the first sub-end 3211 and the first sub-wall 3231, and the radius R4 of the third fillet is 5mm-10mm. A fourth fillet 325 is provided at the connection between the second sub-end 3212 and the second sub-wall 3232, and the radius R5 of the fourth fillet is 5mm-10mm. By providing a third fillet 324 at the connection between the first sub-end 3211 and the first sub-wall 3231, the stress distribution at the connection between the first sub-end 3211 and the first sub-wall 3231 can be optimized, and costs can be reduced, while the service life of the second sub-protrusion 32 can be increased. By providing a fourth fillet 325 at the connection between the second sub-end 3212 and the second sub-wall 3232, the stress distribution at the connection between the second sub-end 3212 and the second sub-wall 3232 can be optimized, and the cost can be reduced and the service life of the second sub-protrusion 32 can be increased.

[0057] For example, the radius R4 of the third fillet can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, or any combination of two of the above values. The radius R5 of the fourth fillet can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, or any combination of two of the above values.

[0058] In some embodiments, a fifth fillet 326 with a radius of 5mm-10mm is provided at the connection between the first sub-wall 3231 and the partition 2, and a sixth fillet 327 with a radius of 5mm-10mm is provided at the connection between the second sub-wall 3232 and the partition 2. By providing the fifth fillet 326 at the connection between the first sub-wall 3231 and the partition 2, the stress distribution at the connection between the first sub-wall 3231 and the partition 2 can be optimized, and costs can be reduced, while the service life of the second sub-protrusion 32 can be increased. Similarly, by providing the sixth fillet 327 at the connection between the second sub-wall 3232 and the partition 2, the stress distribution at the connection between the second sub-wall 3232 and the partition 2 can be optimized, and costs can be reduced, while the service life of the second sub-protrusion 32 can be increased.

[0059] For example, the radius R3 of the fifth fillet can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, or any combination of two of the above values. The radius R8 of the sixth fillet can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, or any combination of two of the above values.

[0060] Specifically, the second sub-wall 3232 includes a first wall portion 32321, a second wall portion 32322, and a third wall portion 32323 connected in sequence. A fourth fillet 325 is provided between the first wall portion 32321 and the second sub-end 3212. A seventh fillet 328 is provided between the first wall portion 32321 and the second wall portion 32322. The radius R6 of the seventh fillet is 5mm-10mm. An eighth fillet 329 is provided between the second wall portion 32322 and the third wall portion 32323. The radius R7 of the eighth fillet is 5mm-10mm. A sixth fillet 327 is provided between the third wall portion 32323 and the partition 2.

[0061] For example, the radius R6 of the seventh fillet can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, or any combination of two of the above values. The radius R7 of the eighth fillet can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, or any combination of two of the above values.

[0062] In some embodiments, the height h2 of the second sub-protrusion along the direction from the third end 321 to the fourth end 322 is 5mm-35mm. By setting the height h2 of the second sub-protrusion to 5mm-35mm, the height h2 of the second sub-protrusion is reasonably moderate, avoiding excessive height which would hinder the flow of coolant too much, and also avoiding excessive height which would hinder the flow of coolant too little.

[0063] For example, the height h2 of the second sub-protrusion can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm or any range of two of the above values.

[0064] In some embodiments, the second sub-protrusion 32 has a second centerline. On the axial section of the second sub-protrusion 32, the intersection of the first sub-wall 3231 and the axial section of the second sub-protrusion 32 forms a second angle β with the second centerline, the degree of the second angle β being 5°-10°.

[0065] For example, the degree of the second included angle β can be 5°, 6°, 7°, 8°, 9°, 10° or any range of two of the above values.

[0066] In some embodiments, on the axial section of the second sub-protrusion 32, the intersection line of the second sub-wall 3232 and the axial section of the second sub-protrusion 32 forms a third angle γ with the second center line, and the degree of the third angle γ is 5°-10°.

[0067] For example, the degree of the third included angle γ can be 5°, 6°, 7°, 8°, 9°, 10° or any range of two of the above values.

[0068] 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.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0071] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0072] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A cylinder head, characterized in that, include: Cylinder head body (1), the cylinder head body (1) has a first cylinder bore center (11), a second cylinder bore center (12) and a water jacket (13), and along a first direction (X), the water jacket (13) is located between the first cylinder bore center (11) and the second cylinder bore center (12); The partition (2) divides the water jacket (13) into an upper sub-water jacket (131) and a lower sub-water jacket (132) distributed along the second direction (Y). The partition (2) has a protrusion (3) on the side facing the upper sub-water jacket (131). The second direction (Y) intersects with the first direction (X).

2. The cylinder head according to claim 1, characterized in that, The protrusion (3) includes a first sub-protrusion (31) and a second sub-protrusion (32). The cylinder head body (1) has an intake valve guide hole (14) and a first bolt hole (15). The first sub-protrusion (31) is located between the intake valve guide hole (14) and the first bolt hole (15). The cylinder head body (1) has an exhaust valve guide hole (16) and a second bolt hole (17). The second sub-protrusion (32) is located between the exhaust valve guide hole (16) and the second bolt hole (17).

3. The cylinder head according to claim 2, characterized in that, The first sub-protrusion (31) has a first center line, and the first sub-protrusion (31) has a symmetrical structure along the first center line.

4. The cylinder head of claim 3, wherein The first sub-protrusion (31) has a first end (311), a second end (312) opposite to the first end (311) and a first sidewall (313). The second end (312) is connected to the partition (2). Along the direction from the first end (311) to the second end (312), the width of the first sub-protrusion (31) gradually increases, and the width (L1) of the second end is 25mm-35mm.

5. The cylinder head of claim 4, wherein A first fillet (314) is provided at the connection between the first end (311) and the first sidewall (313), and the radius (R1) of the first fillet is 5mm-10mm; And / or, a second rounded corner (315) is provided at the connection between the first sidewall (313) and the partition (2), and the radius (R2) of the second rounded corner is 5mm-10mm.

6. The cylinder head according to claim 4, characterized in that, Along the direction from the first end (311) to the second end (312), the height (h1) of the first sub-protrusion is 5mm-30mm.

7. The cylinder head of claim 2, wherein The second sub-protrusion (32) has a third end (321), a fourth end (322) corresponding to the third end (321), and a second sidewall (323). The fourth end (322) is connected to the partition (2). Along the direction from the third end (321) to the fourth end (322), the width of the second sub-protrusion (32) gradually increases, and the width (L2) of the fourth end is 30mm-40mm.

8. The cylinder head according to claim 7, characterized in that, The third end (321) includes a first sub-end (3211) and a second sub-end (3212) connected to the first sub-end (3211). The second sidewall (323) includes a first sub-wall (3231) and a second sub-wall (3232) connected to the first sub-wall (3231). A third rounded corner (324) is provided at the connection between the first sub-end (3211) and the first sub-wall (3231), and the radius (R4) of the third rounded corner is 5mm-10mm. A fourth rounded corner (325) is provided at the connection between the second sub-end (3212) and the second sub-wall (3232), and the radius (R5) of the fourth rounded corner is 5mm-10mm.

9. The cylinder head of claim 8, wherein A fifth rounded corner (326) is provided at the connection between the first sub-wall (3231) and the partition (2), and the radius (R3) of the fifth rounded corner is 5mm-10mm. A sixth rounded corner (327) is provided at the connection between the second sub-wall (3232) and the partition (2), and the radius (R8) of the sixth rounded corner is 5mm-10mm.

10. The cylinder head of claim 7, wherein Along the direction from the third end (321) to the fourth end (322), the height (h2) of the second sub-protrusion is 5mm-35mm.

Images