Cylinder head assembly, horizontally opposed engine, hybrid power assembly, and vehicle

Abstract

A cylinder head assembly (10), a horizontally opposed engine (2000), a hybrid power assembly (3000), and a vehicle. The cylinder head assembly (10) comprises: a body (100), an airflow channel (5) and a coolant channel (4) being provided in the body (100), and the body (100) comprising a lower side and an upper side which face away from each other in a vertical direction. The airflow channel (5) comprises an air inlet (51) and an air outlet (52), the air inlet (51) is arranged on the lower side, and the air outlet (52) is arranged on the upper side. The coolant channel (4) is arranged around at least part of the airflow channel (5), the coolant channel (4) comprises a water inlet (41) and a water outlet (42), the water inlet (41) is arranged on the lower side, and the water outlet (42) is arranged on the upper side.

Description

Cylinder head assembly, horizontally opposed engine, hybrid assembly, and vehicle

[0001] This application claims priority to Chinese Patent Application No. 202411348988.0, filed on September 25, 2024, which claims priority to Chinese Patent Application No. 202311760055.8, filed on December 19, 2023, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure belongs to the technical field of vehicles, and in particular relates to a cylinder head assembly, a horizontally opposed engine, a hybrid assembly, and a vehicle. BACKGROUND

[0003] As a core component of an engine, the cylinder head is mainly used to close the cylinder and form a combustion chamber with the cylinder, and is often in contact with high-temperature gas, thus bearing a large thermal load.

[0004] The cylinder head assembly is usually provided with a cooling liquid channel, and cooling of the cylinder head assembly can be achieved by introducing cooling liquid into the cooling liquid channel. SUMMARY

[0005] The present disclosure aims to provide a cylinder head assembly, a horizontally opposed engine, a hybrid assembly, and a vehicle to solve the problem that air bubbles are easily generated and accumulated in the cooling liquid channel of the cylinder head assembly in the related art, affecting the cooling effect of the cylinder head assembly.

[0006] In a first aspect, a cylinder head assembly is provided, which is applied to a horizontally opposed engine, and includes a body, a gas flow channel and a cooling liquid channel being arranged in the body; the body includes a lower side and an upper side arranged away from each other in a vertical direction; the gas flow channel includes an air inlet and an air outlet, the air inlet is arranged on the lower side, and the air outlet is arranged on the upper side; the cooling liquid channel is arranged around at least part of the gas flow channel, and includes a water inlet and a water outlet, the water inlet is arranged on the lower side, and the water outlet is arranged on the upper side.

[0007] In some embodiments, the horizontally opposed engine includes a plurality of cylinders, and the body is sequentially provided with at least one intake valve seat hole, a mounting seat hole, and at least one exhaust valve seat hole in communication with the gas flow channel at a corresponding position of each cylinder in the plurality of cylinders, from the lower side to the upper side;

[0008] The cooling liquid passage comprises, in sequence from the lower side to the upper side, an intake valve cooling section, a combustion chamber cooling section, and an exhaust valve cooling section, the intake valve cooling section being in communication with the water inlet, and the exhaust valve cooling section being in communication with the water outlet.

[0009] The intake valve cooling section is configured to cool the area around the intake valve seat hole, the combustion chamber cooling section is configured to cool the area around the mounting seat hole, and the exhaust valve cooling section is configured to cool the area around the exhaust valve seat hole.

[0010] In some embodiments, the body comprises a first side and a second side arranged away in a direction perpendicular to the vertical direction, the first side being close to the cylinder;

[0011] The combustion chamber cooling section comprises a first diving portion extending from the second side towards the first side to change at least one of the flow direction or the flow rate of the cooling liquid.

[0012] In some embodiments, the at least one intake valve seat hole comprises two intake valve seat holes arranged at intervals;

[0013] The intake valve cooling section comprises a first channel, a second channel, and a third channel in communication with the water inlet, the second channel being located between the two intake valve seat holes, and the first channel and the third channel being located on the side away from each other of the two intake valve seat holes, respectively.

[0014] In some embodiments, the flow rates of the first channel, the second channel, and the third channel are Q1, Q2, and Q3, respectively, and Q1, Q2, and Q3 satisfy: Q2 = 0.8-1.3(Q1+Q3).

[0015] In some embodiments, the at least one exhaust valve seat hole comprises two exhaust valve seat holes arranged at intervals;

[0016] The exhaust valve cooling section comprises a fourth channel, a fifth channel, and a sixth channel in communication with the water outlet, the fifth channel being located between the two exhaust valve seat holes, and the fourth channel and the sixth channel being located on the side away from each other of the two exhaust valve seat holes, respectively.

[0017] In some embodiments, the flow rates of the fourth channel, the fifth channel, and the sixth channel are Q4, Q5, and Q6, respectively, and Q4, Q5, and Q6 satisfy: Q5 = 0.8-1.3(Q4+Q6).

[0018] In some embodiments, the body comprises a first side and a second side arranged away in a direction perpendicular to the vertical direction, the first side being close to the cylinder;

[0019] At least one of the fourth passage, the fifth passage, and the sixth passage comprises a second diving portion extending from the second side toward the first side to change at least one of a flow direction or a flow rate of the cooling liquid.

[0020] In some embodiments, the exhaust valve cooling section has a first side wall close to the first side, the first side wall being provided with a convex structure;

[0021] The convex structure is located downstream of the second diving portion and protrudes toward the second side, the convex structure being configured to change at least one of a flow direction or a flow rate of the cooling liquid.

[0022] In some embodiments, the body has a first direction perpendicular to the vertical direction;

[0023] The cooling liquid passage comprises a first cooling liquid passage and a second cooling liquid passage, the first cooling liquid passage and the second cooling liquid passage being respectively arranged on two sides of the airflow passage along the first direction and being in communication with each other.

[0024] In some embodiments, the airflow passage comprises an intake section and an exhaust section arranged in sequence along the vertical direction, the intake section being close to the lower side;

[0025] The first cooling liquid passage is arranged around at least part of the intake section and the exhaust section, and the second cooling liquid passage is arranged around at least part of the exhaust section.

[0026] In some embodiments, the body further comprises a water inlet communication hole and a water return communication hole;

[0027] The water inlet communication hole and the water return communication hole are arranged between the first cooling liquid passage and the second cooling liquid passage to communicate the first cooling liquid passage and the second cooling liquid passage;

[0028] The water inlet communication hole is arranged close to the lower side, and the water return communication hole is arranged close to the upper side.

[0029] In some embodiments, the second cooling liquid passage has an upper side region in the vertical direction, and the water return communication hole is arranged in the upper side region.

[0030] In some embodiments, the horizontally-opposed engine comprises a plurality of cylinders, and in a case where the body corresponds to two cylinders of the plurality of cylinders, the body is provided with two mounting seat holes, and the two mounting seat holes are arranged in a spaced manner along an arrangement direction of the two cylinders.

[0031] The body is further provided with three water inlet communication holes, which are arranged at intervals along the arrangement direction of the two cylinders, and one of the three water inlet communication holes is arranged adjacent to at least one of the two mounting seat holes.

[0032] The body is further provided with four water outlet communication holes, which are arranged at intervals along the arrangement direction of the two cylinders and symmetrically distributed along the arrangement direction of the two cylinders.

[0033] In some embodiments, the horizontally-opposed engine includes two cylinders; the body is provided with two cooling liquid channels, which are arranged adjacent to each other along the arrangement direction of the two cylinders.

[0034] The cooling liquid channel includes two water inlets, which are arranged at intervals along the arrangement direction of the two cylinders, and one of the two water inlets corresponds to one cooling liquid channel.

[0035] The water outlet is arranged between the two cooling liquid channels and corresponds to the two cooling liquid channels.

[0036] In a second aspect, a horizontally-opposed engine is provided, which includes the cylinder head assembly described above.

[0037] In a third aspect, a hybrid power assembly is provided, which includes an electric machine and the horizontally-opposed engine described above, and the horizontally-opposed engine is arranged above the electric machine.

[0038] In a fourth aspect, a vehicle is provided, which includes the hybrid power assembly described above.

[0039] In some embodiments of the present disclosure, due to the arrangement of the airflow channel and the cooling liquid channel, and the arrangement of the air inlet of the airflow channel and the water inlet of the cooling liquid channel at the lower side and the arrangement of the air outlet of the airflow channel and the water outlet of the cooling liquid channel at the upper side.

[0040] In this way, during the use of the horizontally-opposed engine, the gas enters from the air inlet at the lower side of the body, the high-temperature gas generated after the combustion is discharged from the air outlet at the upper side of the body, at the same time, the cooling liquid enters from the water inlet at the lower side of the body, and flows out from the water outlet at the upper side of the body after heat exchange with the airflow channel and the body, thereby achieving the cooling of the cylinder head assembly.

[0041] In the process, on the one hand, since the temperature of the airflow channel close to the air inlet is low and the temperature of the airflow channel close to the air outlet is high, i.e. the bubbles are mostly generated in the cooling liquid channel located at the upper part of the body, so that the influence of the bubble movement on the cooling liquid flow can be reduced, and the cooling effect can be improved; on the other hand, since the movement direction of the bubbles and the flow direction of the cooling liquid are both upward, the bubbles can be discharged from the water outlet located at the upper side of the body with the cooling liquid, so that the accumulation of the bubbles in the cooling liquid channel can be effectively avoided, and the cooling effect can be further improved.

[0042] Additional aspects and advantages of the present disclosure will be in part apparent and in part pointed out hereinafter in the description. BRIEF DESCRIPTION OF DRAWINGS

[0043] The above and additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0044] Fig. 1 is a perspective view of a cylinder head assembly according to some embodiments;

[0045] Fig. 2 is a structural view of a cylinder head assembly according to some embodiments;

[0046] Fig. 3 is a perspective view of an airflow channel and a cooling liquid channel of a cylinder head assembly according to some embodiments;

[0047] Fig. 4 is a structural schematic view of a cooling liquid channel of a cylinder head assembly according to some embodiments;

[0048] Fig. 5 is another structural schematic view of a cooling liquid channel of a cylinder head assembly according to some embodiments;

[0049] Fig. 6 is yet another structural schematic view of a cooling liquid channel of a cylinder head assembly according to some embodiments;

[0050] Fig. 7 is yet another structural schematic view of a cooling liquid channel of a cylinder head assembly according to some embodiments;

[0051] Fig. 8 is yet another structural schematic view of a cooling liquid channel of a cylinder head assembly according to some embodiments;

[0052] Fig. 9 is a structural schematic view of a first cooling liquid channel of a cylinder head assembly according to some embodiments;

[0053] Fig. 10 is a structural schematic view of a second cooling liquid channel of a cylinder head assembly according to some embodiments;

[0054] Fig. 11 is a sectional view of a cooling liquid channel of a cylinder head assembly according to some embodiments;

[0055] FIG. 12A is another cross-sectional view of a coolant passage of a cylinder head assembly, according to some embodiments;

[0056] FIG. 12B is a cross-sectional view along line C1-C1 in FIG. 12A;

[0057] FIG. 13 is yet another cross-sectional view of a coolant passage of a cylinder head assembly, according to some embodiments;

[0058] FIG. 14 is a block diagram of a vehicle, according to some embodiments.

[0059] Reference numerals: 100. body, 1. intake valve seat hole, 2. mounting seat hole, 3. exhaust valve seat hole, 4. coolant passage, 41. water inlet, 42. water outlet, 43. intake valve cooling section, 431. first passage, 432. second passage, 433. third passage, 44. combustion chamber cooling section, 441. first dive portion, 45. exhaust valve cooling section, 451. fourth passage, 452. fifth passage, 453. sixth passage, 454. second dive portion, 455. protrusion structure, 46. first coolant passage, 47. second coolant passage, 471. seventh passage, 472. eighth passage, 48. water inlet communication hole, 49. water return communication hole, 410. throttle rib, 5. airflow passage, 51. air inlet, 52. air outlet, S1. undesired flow direction, S2. desired flow direction, A. upper side, B. lower side, C. first side, D. second side, X. vertical direction, Y. first direction. DETAILED DESCRIPTION

[0060] Embodiments of the present application will be described in detail below with reference to the attached drawings, wherein like or similar elements are denoted by the same or similar reference numerals, and the embodiments described below are examples only, which are used to explain the present application, and should not be understood as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative labor fall within the scope of protection of the present disclosure.

[0061] The terms "first", "second" in the description and claims of the present disclosure can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0062] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by 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" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0063] In the description of the present application, it needs to be understood that the terms "mounting", "connecting", "connecting" should be understood in a broad sense unless otherwise explicitly specified and limited, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the meaning of the above terms in the present application can be understood according to the situation.

[0064] In the related art, the cooling liquid may generate bubbles under high temperature conditions and accumulate in the cooling liquid channel, thereby affecting the cooling effect of the cylinder head assembly.

[0065] Based on this, some embodiments of the present disclosure provide a cylinder head assembly, which will be described in detail below in conjunction with the drawings. Referring to FIGS. 1-2, a structural schematic diagram of a cylinder head assembly according to an embodiment of the present application is shown, referring to FIG. 3, a structural schematic diagram of an airflow channel and a cooling liquid channel of a cylinder head assembly according to an embodiment of the present application is shown, referring to FIGS. 4-8, structural schematic diagrams of a cooling liquid channel of a cylinder head assembly according to an embodiment of the present application are shown, referring to FIGS. 9-10, structural schematic diagrams of a first cooling liquid channel and a second cooling liquid channel of a cylinder head assembly according to an embodiment of the present application are shown respectively; referring to FIGS. 11-13, cross-sectional views of a cooling liquid channel of a cylinder head assembly according to an embodiment of the present application are shown.

[0066] As shown in FIGS. 1-3, some embodiments of the present disclosure provide a cylinder head assembly 10, which is applied to a horizontally opposed engine, and the cylinder head assembly 10 comprises a body 100, and the body 100 is provided with at least one airflow channel 5 and at least one cooling liquid channel 4.

[0067] The body 100 comprises two sides arranged away along the vertical direction X, and in some embodiments of the present disclosure, the lower side B and the upper side A shown in FIGS. 1 and 3 are taken as examples for describing the two sides arranged away along the vertical direction X.

[0068] The airflow passage 5 comprises an air inlet 51 and an air outlet 52, the air inlet 51 is arranged at the lower side B, and the air outlet 52 is arranged at the upper side A; the cooling liquid passage 4 is arranged around at least part of the airflow passage 5, and the cooling liquid passage 4 comprises at least one water inlet 41 and a water outlet 42, the water inlet 41 is arranged at the lower side B, and the water outlet 42 is arranged at the upper side A.

[0069] In some embodiments of the present disclosure, due to the arrangement of the airflow passage 5 and the cooling liquid passage 4, and the air inlet 51 of the airflow passage 5 and the water inlet 41 of the cooling liquid passage 4 are both arranged at the lower side B, and the air outlet 52 of the airflow passage 5 and the water outlet 42 of the cooling liquid passage 4 are both arranged at the upper side A. In this way, during the use of the horizontally opposed engine, the gas enters from the air inlet 51 at the lower side B of the body 100, and the high-temperature gas generated after participating in the combustion is discharged from the air outlet 52 at the upper side A of the body 100, at the same time, the cooling liquid enters from the water inlet 41 at the lower side B of the body 100, and flows out from the water outlet 42 at the upper side A of the body 100 after heat exchange with the airflow passage 5 and the body 100, etc., thereby achieving the cooling of the cylinder head assembly.

[0070] During this process, on the one hand, since the temperature of the airflow passage 5 near the air inlet 51 is relatively low, and the temperature of the airflow passage 5 near the air outlet 52 is relatively high, that is, most of the bubbles are generated in the cooling liquid passage 4 at the upper part of the body 100, and the cooling liquid enters from the water inlet 41 at the lower side B of the body 100 and flows out from the water outlet 42 at the upper side A of the body 100, which can reduce the influence of the movement of the bubbles on the flow of the cooling liquid, and is conducive to improving the cooling effect; on the other hand, since the movement direction of the bubbles and the flow direction of the cooling liquid are both upward, the bubbles can be discharged from the water outlet 42 at the upper side A of the body 100 together with the cooling liquid, thereby effectively avoiding the accumulation of bubbles in the cooling liquid passage 4, and is conducive to further improving the cooling effect.

[0071] It should be noted that the airflow passage 5 and the cooling liquid passage 4 are cavities formed on the body 100, that is, the body 100 is a solid structure, and the airflow passage 5 and the cooling liquid passage 4 are virtual structures.

[0072] In order to more intuitively show the structure of the cooling liquid passage 4 in some embodiments of the present disclosure, the cooling liquid passage 4 is presented in the form of a solid in the drawings, and the arrow direction in the figure is the flow direction of the cooling liquid.

[0073] In addition, the upper side A of some embodiments of the present disclosure refers to the upper part of the body 100, and the lower side B refers to the lower part of the body 100.

[0074] It should be noted that in some embodiments of the present disclosure, the "upper side A" and "lower side B" can also be represented by other terms, such as the third side representing the upper part of the body 100 and the fourth side representing the lower part of the body 100, which are within the protection scope of the present disclosure.

[0075] In some embodiments, the body 100 comprises a top wall, a bottom wall and a side wall arranged in a vertical direction X, the air inlet 51 is arranged on the bottom wall, the air outlet 52 is arranged on the top wall, the water inlet 41 is arranged on the side wall close to the bottom wall, and the water outlet 42 is arranged on the side wall close to the top wall.

[0076] In addition, the drawings of some embodiments of the present disclosure only show the cylinder head assembly suitable for two cylinders, and in actual application, the cylinder head assembly of some embodiments of the present disclosure can also be applied to a single cylinder or three or more cylinders, which is not limited here.

[0077] It should be noted that the number and position of the water inlet 41 and the water outlet 42 are not limited in some embodiments of the present disclosure, and can be adjusted according to actual needs by those skilled in the art.

[0078] In some embodiments, as shown in FIGS. 4 and 5, taking the cylinder head assembly suitable for two cylinders as an example, the body 100 is provided with one cooling liquid channel 4 at a position corresponding to each cylinder.

[0079] For example, the at least one cooling liquid channel 4 comprises two cooling liquid channels 4 arranged adjacent to each other along the arrangement direction of the two cylinders; the at least one water inlet 41 comprises two water inlets 41 arranged spaced apart along the arrangement direction of the two cylinders, and one of the two water inlets 41 corresponds to one cooling liquid channel 4.

[0080] The water outlet 42 is arranged between the two cooling liquid channels 4 and corresponds to the two cooling liquid channels 4. That is, the two cooling liquid channels 4 are respectively provided with one water inlet 41, and at the same time, the two cooling liquid channels 4 share one water outlet 42.

[0081] In this case, by arranging two water inlets 41, the uniformity of the flow of cooling liquid in the body 100 can be improved, which is conducive to improving the cooling uniformity of the cylinder head assembly, and by sharing one water outlet 42, the number of water outlets 42 can be reduced, which can further simplify the structure of the cylinder head assembly without affecting the circulation of the cooling liquid.

[0082] In some embodiments of the present disclosure, as shown in FIGS. 4-6, the horizontally opposed engine includes a plurality of cylinders, and the body 100 is sequentially provided with at least one intake valve seat hole 1, at least one mounting seat hole 2, and at least one exhaust valve seat hole 3 in a corresponding position of each cylinder from the lower side B to the upper side A, which are in communication with the airflow passage 5.

[0083] The cooling liquid passage 4 includes an intake valve cooling section 43, a combustion chamber cooling section 44, and an exhaust valve cooling section 45 distributed in sequence from the lower side B to the upper side A, the intake valve cooling section 43 is in communication with the water inlet 41, and the exhaust valve cooling section 45 is in communication with the water outlet 42.

[0084] The intake valve cooling section 43 is configured to cool the area around the intake valve seat hole 1, the combustion chamber cooling section 44 is configured to cool the area around the mounting seat hole 2, and the exhaust valve cooling section 45 is configured to cool the area around the exhaust valve seat hole 3. That is, the intake valve seat hole 1, the mounting seat hole 2, and the exhaust valve seat hole 3 are all within the cooling range of the cooling liquid passage 4, and the cooling liquid passage 4 can sequentially cool the areas around the intake valve seat hole 1, the mounting seat hole 2, and the exhaust valve seat hole 3, which is conducive to improving the overall cooling effect of the cylinder head assembly.

[0085] It should be noted that the intake valve seat hole 1 is configured to mount an intake valve, the exhaust valve seat hole 3 is configured to mount an exhaust valve, and the mounting seat hole 2 is configured to mount at least one of a spark plug or an oil injector. When the mounting seat hole 2 simultaneously mounts a spark plug and an oil injector, the cylinder head assembly is suitable for a direct injection gasoline engine.

[0086] In some embodiments of the present disclosure, as shown in FIG. 12A, the body 100 includes a first side C and a second side D disposed away along a direction perpendicular to the vertical direction X, the first side C is close to the cylinder, and the second side D is close to the cylinder head cover, the first side C and the cylinder enclose a combustion chamber, and the second side D and the cylinder head cover enclose a mounting cavity for mounting a camshaft; the combustion chamber cooling section 44 includes a first diving portion 441 extending from the second side D towards the first side C to change at least one of the flow direction or the flow rate of the cooling liquid.

[0087] In actual application, when the cylinder head assembly is assembled with the cylinder, a combustion chamber is formed between the cylinder head assembly and the cylinder, which generally corresponds to the combustion chamber cooling area of the cooling liquid passage 4.

[0088] Based on this, when the first diving portion 441 is arranged in the combustion chamber cooling section 44 and extends from the second side D (i.e., the side away from the combustion chamber) towards the first side C (i.e., the side close to the combustion chamber), the cooling liquid can dive towards the direction close to the combustion chamber wall, which improves the flow rate of the cooling liquid in the combustion chamber cooling section 44 and is conducive to improving the combustion chamber wall, i.e., the cooling effect of the corresponding part of the body 100 and the combustion chamber.

[0089] It can be understood that the flow rate of the cooling liquid can be decomposed into two directions, one direction is the flow rate in the vertical direction, that is, the flow rate from the lower side B to the upper side A shown in FIG. 12A, that is, the flow rate in the X direction, which is referred to as the first sub-flow rate in the following; the other direction is the flow rate between the first side C and the second side D, that is, the flow rate in the Y direction shown in FIG. 12A, which is referred to as the second sub-flow rate in the following.

[0090] It should be noted that the diving refers to: when the cooling liquid enters the first diving part 441, among the flow rates of the cooling liquid in two directions, the second sub-flow rate increases and the first sub-flow rate decreases, so that the cooling liquid dives from the second side to the first side, and the cooling effect of the corresponding part of the body 100 and the combustion chamber is improved.

[0091] It should be noted that assuming that the flow direction of the cooling liquid in the first diving part 441 is the first flow direction, the flow direction of the cooling liquid in the channel upstream of the first diving part 441 is the second flow direction, the included angle between the second flow direction and the first flow direction can be 90°-150°, that is, the flow direction of the cooling liquid changes by 90°-150°, the flow rate is improved, and the combustion chamber wall surface is sufficiently cooled.

[0092] In actual application, after the cylinder head assembly and the cylinder are assembled, since the cylinder head assembly is often in contact with high-temperature and high-pressure combustion gas, it bears a large thermal load. In this case, the heat exchange is the strongest, that is, the region with high thermal load is the nose bridge region. The nose bridge region refers to the region between the two intake valve seat holes 1 and between the two exhaust valve seat holes 3.

[0093] In order to facilitate understanding, FIG. 11 schematically separates the intake valve cooling section 43, the combustion chamber cooling section 44 and the exhaust valve cooling section 45 with dashed lines.

[0094] In some embodiments of the present disclosure, as shown in FIG. 11, the at least one intake valve seat hole 1 includes two intake valve seat holes 1, which are arranged at intervals; the intake valve cooling section 43 includes a first channel 431, a second channel 432 and a third channel 433 which are in communication with the water inlet 41, the second channel 432 is located between the two intake valve seat holes 1, and the first channel 431 and the third channel 433 are respectively located on the side away from each other of the two intake valve seat holes 1.

[0095] In some embodiments of the present disclosure, by arranging the first channel 431, the second channel 432 and the third channel 433, the regions around the two intake valve seat holes 1 can be sufficiently cooled, which is beneficial to improve the cooling uniformity of the cylinder head assembly.

[0096] In some embodiments of the present disclosure, the flow rates of the first channel 431, the second channel 432, and the third channel 433 are Q1, Q2, and Q3 respectively, and Q1, Q2, and Q3 satisfy: Q2 = 0.8-1.3(Q1+Q3).

[0097] In some embodiments of the present disclosure, the flow rate of the second channel 432 located in the middle is 0.8-1.3 times the sum of the flow rates of the first channel 431 and the third channel 433 located on both sides, that is, the flow rate through the nose bridge area (i.e., the nose bridge area between the two intake valve seat holes 1) is large, and the coolant can fully exchange heat with the nose bridge area, thereby effectively reducing the temperature of the nose bridge area and improving the overall cooling effect of the cylinder head assembly.

[0098] It should be noted that the flow rate of the channel is affected by multiple factors, such as the cross-sectional area of the channel, the position distribution of the inlet and outlet ports, etc.

[0099] Taking the cross-sectional area of the channel as an example, as the cross-sectional area increases, the flow rate of the channel increases. Based on this, in actual application, the flow rates of the first channel 431, the second channel 432, and the third channel 433 can be adjusted by adjusting the cross-sectional areas of the three channels.

[0100] Taking the position distribution of the inlet and outlet ports as an example, the smaller the distance between the inlet port 41 and the flow passage, the easier it is for the coolant to flow into the flow passage, and thus the larger the flow rate of the flow passage. Similarly, the smaller the distance between the outlet port 42 and the flow passage, the easier it is for the coolant to flow from the flow passage to the outlet port 42, and thus the larger the flow rate of the flow passage. The influence of the position distribution of the inlet and outlet ports 42 on the flow rate of the flow passage can also be understood based on flow resistance. The larger the distance between the inlet port 41 and the flow passage, and the larger the distance between the outlet port 42 and the flow passage, the longer the flow path of the coolant from the inlet port 41 to the outlet port 42 via the flow passage, and the greater the overall flow resistance, and thus the smaller the flow rate. Based on this, in actual application, the flow rates of the three channels can also be adjusted by adjusting the position distribution of the inlet and outlet ports.

[0101] In some embodiments of the present disclosure, as shown in FIG. 11, the at least one exhaust valve seat hole 3 includes two exhaust valve seat holes 3, and the two exhaust valve seat holes 3 are arranged in a spaced manner. The exhaust valve cooling section 45 includes a fourth channel 451, a fifth channel 452, and a sixth channel 453, the fifth channel 452 is located between the two exhaust valve seat holes 3, and the fourth channel 451 and the sixth channel 453 are respectively located on the side away from each other of the two exhaust valve seat holes 3.

[0102] In some embodiments of the present disclosure, by arranging the fourth channel 451, the fifth channel 452, and the sixth channel 453, the areas around the two exhaust valve seat holes 3 can be fully cooled, which is beneficial to improving the cooling uniformity of the cylinder head assembly.

[0103] In some embodiments of the present disclosure, the flow rates of the fourth channel 451, the fifth channel 452, and the sixth channel 453 are Q4, Q5, and Q6 respectively, and Q4, Q5, and Q6 satisfy: Q5 = 0.8-1.3(Q4+Q6).

[0104] In some embodiments of the present disclosure, since the flow rate of the fifth channel 452 located in the middle is 0.8-1.3 times the sum of the flow rates of the fourth channel 451 and the sixth channel 453 located on both sides, that is, the flow rate through the nose bridge area (i.e., the nose bridge area between the two exhaust valve seat holes 3) is large, the coolant can fully exchange heat with the nose bridge area, thereby effectively reducing the temperature of the nose bridge area, and helping to improve the overall cooling effect of the cylinder head assembly. It should be noted that the size of the flow rate of the channel is simultaneously affected by multiple factors, such as the cross-sectional area of the channel, the position distribution of the inlet and outlet ports, and the like. Taking the cross-sectional area of the channel as an example, as the cross-sectional area increases, the flow rate of the channel increases.

[0105] Based on this, in actual applications, the flow rates of the fourth channel 451, the fifth channel 452, and the sixth channel 453 can be adjusted by adjusting the sizes of the cross-sectional areas of the three channels.

[0106] Taking the position distribution of the inlet and outlet ports as an example, the smaller the distance between the inlet port 41 and the flow passage, the easier it is for the coolant to flow into the flow passage, and thus the larger the flow rate of the flow passage. Similarly, the smaller the distance between the outlet port 42 and the flow passage, the easier it is for the coolant to flow from the flow passage to the outlet port 42, and thus the larger the flow rate of the flow passage.

[0107] In addition, the influence of the position distribution of the inlet and outlet ports 42 on the flow rate of the flow passage can also be understood based on flow resistance. The greater the distance between the inlet port 41 and the flow passage, and the greater the distance between the outlet port 42 and the flow passage, the longer the flow path of the coolant from the inlet port 41 to the outlet port 42 via the flow passage, and the greater the overall flow resistance, and thus the smaller the flow rate. Based on this, in actual applications, the flow rates of the three channels can also be adjusted by adjusting the position distribution of the inlet and outlet ports.

[0108] In actual applications, as shown in FIG. 11, the cooling liquid channel 4 of some embodiments of the present disclosure is also provided with a throttling rib 410, which is configured to change at least one of the flow direction or the flow rate of the cooling liquid.

[0109] For example, the throttling rib 410 can be a protruding portion formed on the inner wall of the cooling liquid channel 4. On the one hand, the protruding portion can reduce the cross-sectional area of the corresponding channel, thereby reducing the flow rate of the cooling liquid passing through. On the other hand, by adjusting the position or shape of the protruding portion, the flow rate of the cooling liquid can be changed, and the cooling liquid can be guided to flow in the desired direction. The present disclosure does not limit the position of the throttling rib 410, and those skilled in the art can adjust it according to actual needs.

[0110] In some embodiments of the present disclosure, as shown in FIG. 9 and FIG. 13, the body 100 includes a first side C and a second side D disposed away along a direction perpendicular to the vertical direction X, the first side C is close to the cylinder, and the second side D is close to the cylinder head cover, the first side C and the cylinder form a combustion chamber, and the second side D and the cylinder head cover form a mounting chamber for mounting the camshaft; at least one of the fourth passage 451, the fifth passage 452 and the sixth passage 453 includes a second diving portion 454 extending from the second side D to the direction of the first side C, so as to change at least one of the flow direction or the flow rate of the cooling liquid.

[0111] In actual application, since the cylinder head cover is for intake on the lower side B and exhaust on the upper side A, the temperature of the upper part of the body 100 is relatively high. Taking the fifth passage 452 as an example, the fifth passage 452 corresponds to the bridge area between the two exhaust valve seat holes 3, and the bridge area has a first wall close to the cylinder, which is directly contacted with high-temperature gas and has a relatively high temperature.

[0112] By arranging the second diving portion 454 on the fifth passage 452 located at the upper part of the body 100, and extending the second diving portion 454 from the second side D (i.e. the side away from the first wall) to the direction of the first side C (i.e. the side close to the first wall), the cooling liquid can be made to dive towards the direction close to the first wall, so as to increase the flow rate of the cooling liquid in the bridge area, and facilitate to improve the cooling effect of the bridge area.

[0113] Similarly, by arranging the second diving portion 454 in at least one of the fourth passage 451 or the sixth passage 453, the flow rate of the cooling liquid can be increased, so as to improve the cooling effect of the side away from each other of the two exhaust valve seat holes 3.

[0114] It can be understood that the flow rate of the cooling liquid can be decomposed into flow rates in two directions, one direction is the flow rate in the vertical direction, i.e. the flow rate along the direction from the lower side B to the upper side A shown in FIG. 13, i.e. the flow rate in the X direction, which is referred to as the third partial flow rate below; the other direction is the flow rate between the first side C and the second side D, i.e. the flow rate in the Y direction shown in FIG. 13, which is referred to as the fourth partial flow rate below.

[0115] It should be noted that diving refers to that, when the cooling liquid enters the second diving portion 454, the fourth partial flow rate in the two directions of the cooling liquid is increased and the third partial flow rate is decreased, so that the cooling liquid dives from the second side to the first side, and the cooling effect of the part corresponding to the body 100 and the combustion chamber is improved.

[0116] It should be noted that the second diving portion 454 can be arranged in at least one of the fourth passage 451, the fifth passage 452 and the sixth passage 453 according to actual needs of those skilled in the art, which is not limited herein.

[0117] In some embodiments, since the temperature of the bridge region between the two exhaust valve seat holes 3 is high and the flow rate of the cooling liquid passing through the bridge region is large, the second diving portion 454 can be arranged only in the fifth passage 452, so as to improve the cooling effect of the cylinder head assembly and reduce the processing difficulty of the cylinder head assembly.

[0118] In addition, assuming that the flow direction of the cooling liquid in the second diving portion 454 is a third flow direction, the flow direction of the cooling liquid in the passage upstream of the second diving portion 454 is a fourth flow direction, and the included angle between the fourth flow direction and the third flow direction ranges from 90° to 150°, that is, the flow direction of the cooling liquid changes by 90° to 150°, the flow rate is improved, and the combustion chamber wall is sufficiently cooled.

[0119] In some embodiments of the present disclosure, as shown in FIG. 13, the exhaust valve cooling section 45 has a first side wall close to the first side C, and the first side wall is provided with a protruding structure 455; the protruding structure 455 is located downstream of the second diving portion 454 and protrudes towards the second side D, and the protruding structure 455 is configured to change at least one of the flow direction or the flow rate of the cooling liquid.

[0120] In actual application, since the exhaust valve cooling section 45 has a large size along the first direction Y, that is, the horizontal direction, the cooling liquid flows out along an undesirable flow direction S1, and in this process, the cooling liquid is difficult to contact with the airflow passage 5, so that the cooling effect of the airflow passage 5 is poor. Based on this, by arranging the protruding structure 455 downstream of the second diving portion 454, and the protruding structure 455 protrudes towards the second side D, that is, close to the side of the airflow passage 5, the flow direction of the cooling liquid can be changed, so that the cooling liquid flows out along the desired flow direction S2, and in this process, the cooling liquid can be fully heat-exchanged with the airflow passage 5, which is beneficial to improve the cooling effect of the airflow passage 5.

[0121] In actual application, as shown in FIG. 12B, since the flow area of the fourth passage 451 and the sixth passage 453 is small, that is, the flow area size is less than or equal to L1xL2. For example, L1 is 8 mm, and L2 is 10 mm.

[0122] In this case, since the cooling liquid in the fourth passage 451 and the sixth passage 453 can fully contact with the airflow passage 5, the protruding structure 455 can not be arranged. It should be noted that the protruding structure 455 in some embodiments of the present disclosure can be a convex with a streamline shape, which can reduce the flow resistance while changing the flow direction of the cooling liquid.

[0123] In some embodiments of the present disclosure, as shown in FIGS. 8-10, the body 100 has a first direction Y perpendicular to the vertical direction X; the cooling liquid channel 4 includes a first cooling liquid channel 46 and a second cooling liquid channel 47, which are respectively arranged on both sides of the airflow channel 5 along the first direction Y and are in communication with each other.

[0124] In some embodiments of the present disclosure, by arranging the first cooling liquid channel 46 and the second cooling liquid channel 47, and respectively arranging the first cooling liquid channel 46 and the second cooling liquid channel 47 on both sides of the airflow channel 5 along the first direction Y.

[0125] In this way, the area around the airflow channel 5 can be sufficiently cooled, which is conducive to improving the cooling uniformity and cooling effect of the cylinder head assembly. It should be noted that the first direction Y of the embodiments of the present disclosure refers to the horizontal direction, i.e., the thickness direction of the body 100.

[0126] In some embodiments of the present disclosure, as shown in FIG. 3, the airflow channel 5 includes an intake section and an exhaust section arranged in sequence along the vertical direction X, and the intake section is close to the lower side B; the first cooling liquid channel 46 is arranged around at least part of the intake section and the exhaust section, and the second cooling liquid channel 47 is arranged around at least part of the exhaust section. That is, in the plane perpendicular to the first direction Y along the first direction Y, the projection of the first cooling liquid channel 46 covers at least part of the intake section and the exhaust section, and the projection of the second cooling liquid channel 47 covers at least part of the exhaust section.

[0127] In actual application, the temperature of the intake section is lower than that of the exhaust section, i.e., the cooling demand of the exhaust section is higher. Based on this, when the first cooling liquid channel 46 is arranged around at least part of the intake section and the exhaust section, and the second cooling liquid channel 47 is arranged around at least part of the exhaust section, i.e., the intake section with lower temperature is cooled by the first cooling liquid channel 46 only, and the exhaust section with higher temperature is cooled by the first cooling liquid channel 46 and the second cooling liquid channel 47 simultaneously.

[0128] By reasonably arranging the first cooling liquid channel 46 and the second cooling liquid channel 47, the structure of the body 100 is simplified, and effective cooling of the intake section and the exhaust section can be realized, which is conducive to improving the cooling uniformity and cooling effect of the cylinder head assembly.

[0129] It should be noted that the airflow channel 5 includes the intake section and the exhaust section, one end of the intake section is in communication with the air inlet 51, and the other end is in communication with the combustion chamber; one end of the exhaust section is in communication with the air outlet 52, and the other end is in communication with the combustion chamber.

[0130] In some embodiments of the present disclosure, as shown in FIGS. 7 and 11, the body 100 further comprises at least one water inlet communication hole 48 and at least one water outlet communication hole 49; the water inlet communication hole 48 and the water outlet communication hole 49 are arranged between the first cooling liquid channel 46 and the second cooling liquid channel 47 to communicate the first cooling liquid channel 46 and the second cooling liquid channel 47; the water inlet communication hole 48 is arranged close to the lower side B, and the water outlet communication hole 49 is arranged close to the upper side A.

[0131] In some embodiments of the present disclosure, by arranging the water inlet communication hole 48 and the water outlet communication hole 49, the flow of the cooling liquid in the second cooling liquid channel 47 can be realized, which is beneficial to improve the cooling performance of the second cooling channel.

[0132] Since the water inlet communication hole 48 is arranged close to the lower side B, and the water outlet communication hole 49 is arranged close to the upper side A, that is, the water flow direction of the second cooling liquid channel 47 is from bottom to top. In this way, when the cooling liquid in the second cooling channel generates bubbles due to high temperature, the bubbles can enter the first cooling liquid channel 46 with the cooling liquid from the water outlet communication hole 49 and be discharged from the water outlet 42, thereby effectively avoiding the accumulation of bubbles in the second cooling channel, which is beneficial to further improve the cooling effect.

[0133] It should be noted that the present disclosure does not limit the number of water inlet communication holes 48 and water outlet communication holes 49, and those skilled in the art can adjust them according to actual needs. In addition, the water inlet communication hole 48 and the water outlet communication hole 49 can be drilled from the side of the first cooling liquid channel 46 for communication, or from the side of the second cooling liquid channel 47 for communication, which is not limited herein, and those skilled in the art can select according to actual needs.

[0134] In some embodiments, for a single cylinder, the at least one water inlet communication hole 48 comprises two water inlet communication holes 48 arranged at both ends of the body 100 along the length direction, the water inlet communication hole 48 close to the first channel 431 can supply part of the cooling liquid of the first channel 431 and the second channel 432 to flow into the second cooling liquid channel 47, and the water inlet communication hole 48 close to the third channel 433 can supply part of the cooling liquid of the third channel 433 and the second channel 432 to flow into the second cooling liquid channel 47. By arranging two water inlet communication holes 48, the uniformity of the water flow can be improved, which is beneficial to improve the cooling performance of the second cooling liquid channel 47.

[0135] As shown in FIG. 6, the second cooling liquid channel 47 comprises a seventh channel 471 and an eighth channel 472, the seventh channel 471 and the eighth channel 472 are respectively located on both sides of the mounting seat hole 2 and have substantially the same flow, and flow to the first cooling liquid channel 46 from the water outlet communication hole 49 after heat exchange with the cooling liquid and the airflow channel 5, the body 100, etc.

[0136] The at least one water return communication hole 49 includes two water return communication holes 49 arranged at both ends of the body 100 in the length direction, so that the cooling liquid in the seventh channel 471 and the eighth channel 472 can flow smoothly to the first cooling liquid channel 46. By arranging two water return communication holes 49, the uniformity of water flow can be improved, and dead zones can be avoided, which is beneficial to improve the cooling performance of the second cooling liquid channel 47.

[0137] It can be understood that the length direction of the body 100 refers to the direction perpendicular to the X direction and the Y direction. In the case that the body 100 corresponds to a plurality of cylinders, the length direction of the body 100 refers to the arrangement direction of the plurality of cylinders.

[0138] It can be understood that for a horizontally opposed engine provided with a plurality of cylinders, the water inlet communication hole 48 and the water return communication hole 49 located between adjacent two cylinders, i.e. adjacent two cooling liquid channels 4 on the body 100, can be arranged separately or combined.

[0139] In some embodiments, as shown in FIG. 11, in the case that the body 100 corresponds to two cylinders, the body 100 is provided with two mounting seat holes 2, and the two mounting seat holes 2 are arranged at intervals in the arrangement direction of the two cylinders.

[0140] The at least one water inlet communication hole 48 includes three water inlet communication holes 48 arranged at intervals in the arrangement direction of the two cylinders, and one water inlet communication hole 48 is arranged adjacent to at least one mounting seat hole 2.

[0141] The at least one water return communication hole 49 includes four water return communication holes 49 arranged at intervals in the arrangement direction of the two cylinders, and the four water return communication holes 49 are symmetrically distributed in the arrangement direction of the two cylinders. That is, the water inlet communication holes 48 between adjacent two cooling liquid channels 4 are combined, and the water return communication holes 49 between adjacent two cylinders are arranged separately.

[0142] In this way, not only the flexibility of arranging the water inlet communication hole 48 and the water return communication hole 49 can be improved, which is beneficial to improve the cooling uniformity of the cylinder head assembly, but also the structure of the cylinder head assembly can be further simplified, which is beneficial to reduce the machining difficulty of the cylinder head assembly.

[0143] In some embodiments of the present disclosure, the second cooling liquid channel 47 has an upper region in the vertical direction X, and the water return communication hole 49 is arranged in the upper region.

[0144] In this way, by arranging the backwater communication hole 49 in the upper side region, the bubbles generated in the second cooling liquid passage 47 can flow to the first cooling liquid passage 46 along with the cooling liquid through the backwater communication hole 49 and be discharged from the water outlet 42, so that the accumulation of bubbles in the second cooling liquid passage 47 can be effectively avoided, and the cooling performance of the second cooling liquid passage 47 can be improved.

[0145] It should be noted that the upper side region of the cylinder head assembly in the embodiments of the present disclosure refers to the region with the highest position in the second cooling passage after the cylinder head assembly is assembled. By arranging the backwater communication hole 49 close to the upper side region, even if the cylinder head assembly is tilted during use, there will be no gas accumulation.

[0146] In summary, the cylinder head assembly provided by some embodiments of the present disclosure has at least the following advantages:

[0147] Due to the arrangement of the gas flow passage and the cooling liquid passage, and the arrangement of the gas inlet of the gas flow passage and the water inlet of the cooling liquid passage on the lower side, and the arrangement of the gas outlet of the gas flow passage and the water outlet of the cooling liquid passage on the upper side, in the use of the horizontally opposed engine, the gas enters from the gas inlet on the lower side of the body, the high-temperature gas generated after participating in combustion is discharged from the gas outlet on the upper side of the body, at the same time, the cooling liquid enters from the water inlet on the lower side of the body, and flows out from the water outlet on the upper side of the body after heat exchange with the gas flow passage and the body, so that the cooling of the cylinder head assembly is realized.

[0148] In this process, on the one hand, since the temperature of the gas flow passage close to the gas inlet is lower and the temperature of the gas flow passage close to the gas outlet is higher, i.e., most of the bubbles are generated in the cooling liquid passage on the upper part of the body, so that the influence of the movement of the bubbles on the flow of the cooling liquid can be reduced, and the cooling effect can be improved; on the other hand, since the movement direction of the bubbles and the flow direction of the cooling liquid are both upward, the bubbles can be discharged from the water outlet on the upper side of the body along with the cooling liquid, so that the accumulation of bubbles in the cooling liquid passage can be effectively avoided, and the cooling effect can be further improved.

[0149] Some embodiments of the present disclosure also provide a horizontally opposed engine, as shown in FIG. 14, the horizontally opposed engine 2000 comprises the cylinder head assembly 10 according to any one of the above embodiments.

[0150] It should be noted that in some embodiments of the present disclosure, the structure of the cylinder head assembly 10 is the same as that of the cylinder head assembly 10 described in any one of the above embodiments, and the beneficial effects are similar, which will not be repeated here.

[0151] Some embodiments of the present disclosure further provide a hybrid power assembly, as shown in Fig. 14, the hybrid power assembly 3000 comprises the motor 3001 and the above-mentioned horizontal-opposed engine 2000, the horizontal-opposed engine 2000 is arranged above the motor 3001. In this way, since the cylinder head assembly of the horizontal-opposed engine 2000 is from the lower side B intake, the upper side A exhaust, that is, the exhaust is away from the motor 3001, so that the influence of exhaust heat radiation on the motor can be avoided, and the working reliability of the hybrid power assembly is improved.

[0152] It should be noted that in some embodiments of the present disclosure, the structure of the horizontal-opposed engine is the same as the above-mentioned horizontal-opposed engine, and the beneficial effects are similar, which will not be repeated here.

[0153] Some embodiments of the present disclosure further provide a vehicle, as shown in Fig. 14, the vehicle 1000 comprises the above-mentioned hybrid power assembly 3000.

[0154] It should be noted that in some embodiments of the present disclosure, the structure of the hybrid power assembly is the same as the hybrid power assembly of any one of the above-mentioned embodiments, and the beneficial effects are similar, which will not be repeated here.

[0155] In the description of the present specification, the description of the terms "some embodiments", "examples" or "some examples" means that the features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above-mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the described features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0156] Although the embodiments of the present disclosure have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.

Claims

1. A cylinder head assembly (10) applied to a horizontally opposed engine (2000), the cylinder head assembly (10) comprising a body (100) in which an airflow passage (5) and a coolant passage (4) are arranged; the body (100) comprising a lower side and an upper side arranged away from each other in a vertical direction; the airflow passage (5) comprising an air inlet (51) and an air outlet (52), the air inlet (51) being arranged on the lower side, and the air outlet (52) being arranged on the upper side; the coolant passage (4) being arranged around at least part of the airflow passage (5), the coolant passage (4) comprising a water inlet (41) and a water outlet (42), the water inlet (41) being arranged on the lower side, and the water outlet (42) being arranged on the upper side.

2. The cylinder head assembly (10) of claim 1, wherein, the horizontally opposed engine (2000) comprising a plurality of cylinders, the body (100) being arranged with, in order from the lower side to the upper side, at least one air inlet valve seat hole (1) in communication with the airflow passage (5), a mounting seat hole (2), and at least one air outlet valve seat hole (3) at a corresponding position of each of the plurality of cylinders; the coolant passage (4) comprising, in order from the lower side to the upper side, an air inlet valve cooling section (43), a combustion chamber cooling section (44), and an air outlet valve cooling section (45), the air inlet valve cooling section (43) being in communication with the water inlet (41), and the air outlet valve cooling section (45) being in communication with the water outlet (42); wherein the air inlet valve cooling section (43) is configured to cool a region around the air inlet valve seat hole (1), the combustion chamber cooling section (44) is configured to cool a region around the mounting seat hole (2), and the air outlet valve cooling section (45) is configured to cool a region around the air outlet valve seat hole (3).

3. The cylinder head assembly (10) of claim 2, wherein, the body (100) comprising a first side and a second side arranged away from each other in a direction perpendicular to the vertical direction, the first side being close to the cylinder; the combustion chamber cooling section (44) comprising a first diving portion (441) extending from the second side towards the first side to change at least one of a flow direction or a flow rate of the coolant.

4. The cylinder head assembly (10) of claim 2 or 3, wherein, the at least one air inlet valve seat hole (1) comprising two air inlet valve seat holes (1) arranged away from each other; the air inlet valve cooling section (43) comprising a first channel (431), a second channel (432), and a third channel (433) in communication with the water inlet (41), the second channel (432) being located between the two air inlet valve seat holes (1), and the first channel (431) and the third channel (433) being located on a side away from each other of the two air inlet valve seat holes (1), respectively.

5. The cylinder head assembly (10) of claim 4, wherein, a flow rate of the first channel (431), the second channel (432), and the third channel (433) is Q1, Q2, and Q3, respectively, and Q1, Q2, and Q3 satisfy Q2 = 0.8-1.3(Q1+Q3).

6. The cylinder head assembly (10) of claim 2 or 3, wherein, The at least one exhaust valve seat hole (3) comprises two exhaust valve seat holes (3) arranged at intervals; The exhaust valve cooling section (45) comprises a fourth channel (451), a fifth channel (452) and a sixth channel (453) in communication with the water outlet (42), the fifth channel (452) is located between the two exhaust valve seat holes (3), and the fourth channel (451) and the sixth channel (453) are located on the sides away from each other of the two exhaust valve seat holes (3) respectively.

7. The cylinder head assembly (10) of claim 6, wherein, The flow rates of the fourth channel (451), the fifth channel (452) and the sixth channel (453) are Q4, Q5 and Q6 respectively, and Q4, Q5 and Q6 satisfy: Q5 = 0.8-1.3(Q4+Q6).

8. The cylinder head assembly (10) of claim 6, wherein, The body (100) comprises a first side and a second side arranged away in a direction perpendicular to the vertical direction, and the first side is close to the cylinder; At least one of the fourth channel (451), the fifth channel (452) and the sixth channel (453) comprises a second diving part (454) extending from the second side to the direction of the first side to change at least one of the flow direction or the flow rate of the cooling liquid.

9. The cylinder head assembly (10) of claim 8, wherein, The exhaust valve cooling section (45) has a first side wall close to the first side, and the first side wall is provided with a convex structure (455); The convex structure (455) is located downstream of the second diving part (454) and protrudes towards the second side, and the convex structure is configured to change at least one of the flow direction or the flow rate of the cooling liquid.

10. The cylinder head assembly (10) of any one of claims 1-9, wherein, The body (100) has a first direction perpendicular to the vertical direction; The cooling liquid channel (4) comprises a first cooling liquid channel (46) and a second cooling liquid channel (47), and the first cooling liquid channel (46) and the second cooling liquid channel (47) are arranged on both sides of the airflow channel (5) in the first direction and are in communication with each other.

11. The cylinder head assembly (10) of claim 10, wherein, The airflow channel (5) comprises an intake section and an exhaust section arranged in sequence along the vertical direction, and the intake section is close to the lower side; The first cooling liquid channel (46) is arranged around at least part of the intake section and the exhaust section, and the second cooling liquid channel (47) is arranged around at least part of the exhaust section.

12. The cylinder head assembly (10) of claim 10 or 11, wherein, The body (100) further comprises a water inlet communication hole (48) and a water return communication hole (49); The water inlet communication hole (48) and the water return communication hole (49) are arranged between the first cooling liquid channel (46) and the second cooling liquid channel (47) to communicate the first cooling liquid channel (46) and the second cooling liquid channel (47); Wherein, the water inlet communication hole (48) is arranged close to the lower side, and the water return communication hole (49) is arranged close to the upper side.

13. The cylinder head assembly (10) of claim 12, wherein, The second cooling liquid channel (47) has an upper side region in the vertical direction, and the water return communication hole (49) is arranged in the upper side region.

14. The cylinder head assembly (10) of claim 12, wherein, The horizontal opposed engine (2000) comprises a plurality of cylinders, and the body (100) is provided with two mounting seat holes (2) corresponding to two of the plurality of cylinders, and the two mounting seat holes (2) are arranged in a spaced manner along the arrangement direction of the two cylinders; The body (100) is further provided with three water inlet communication holes (48), and the three water inlet communication holes (48) are arranged in a spaced manner along the arrangement direction of the two cylinders, and one of the three water inlet communication holes (48) is arranged adjacent to at least one of the two mounting seat holes (2); The body (100) is further provided with four water return communication holes (49), and the four water return communication holes (49) are arranged in a spaced manner along the arrangement direction of the two cylinders, and the four water return communication holes (49) are symmetrically distributed along the arrangement direction of the two cylinders.

15. The cylinder head assembly (10) of any one of claims 1-14, wherein, The horizontal opposed engine (2000) comprises two cylinders; the body (100) is provided with two cooling liquid channels (4), and the two cooling liquid channels (4) are arranged adjacent to each other along the arrangement direction of the two cylinders; The cooling liquid channel (4) comprises two water inlets (41), and the two water inlets (41) are arranged in a spaced manner along the arrangement direction of the two cylinders, and one of the two water inlets (41) corresponds to one cooling liquid channel (4); The water outlet (42) is arranged between the two cooling liquid channels (4) and corresponds to the two cooling liquid channels (4).

16. A horizontal opposed engine (2000) comprising the cylinder head assembly (10) according to any one of claims 1-15.

17. A hybrid powertrain (3000) comprising: A motor (3001) and the horizontal opposed engine (2000) according to claim 16, wherein the horizontal opposed engine (2000) is arranged above the motor (3001).

18. A vehicle comprising: The hybrid assembly (3000) according to claim 17; Or The horizontal opposed engine (2000) according to claim 16.

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