Cylinder cover, engine and vehicle

Abstract

A vehicle (1000), the vehicle (1000) comprising an engine (100), wherein the engine (100) comprises a cylinder cover (1), the cylinder cover (1) comprising a water jacket (20). The water jacket (20) comprises a lower cooling water jacket part (21) and an upper cooling water jacket part (23), wherein the lower cooling water jacket part (21) is in communication with the upper cooling water jacket part (23); the lower cooling water jacket part (21) is provided with a liquid inlet (210); and the upper cooling water jacket part (23) is provided with a liquid outlet (230).

Description

Cylinder heads, engines and vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on October 31, 2023, with application number 202322944178.9 and titled “Cylinder Head, Engine and Vehicle,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of vehicle technology, and in particular to a cylinder head, an engine and a vehicle. Background Art

[0004] In related art, the engine's cylinder head water jacket is divided into a main water jacket and a side water jacket. The main water jacket is further divided into an upper water chamber and a lower water chamber by a partition plate, while the side water jacket surrounds the exhaust duct. After entering the main water jacket through the liquid inlet, the coolant is divided into two parts: one part enters the upper water chamber from the lower water chamber and is then discharged from the upper water chamber outlet. The other part enters the side water jacket from the front end of the main water jacket and is then discharged from the upper water chamber outlet of the main water jacket. However, this cylinder head water jacket has a complex structure, poor cooling effect on the coolant, and the side water jacket has limited cooling effect on the exhaust duct, which is not conducive to rapid warm-up.

[0005] Public content

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a cylinder head with a more reasonable and effective cooling path, which can improve the cooling effect of parts such as the combustion chamber, spark plugs and exhaust ducts.

[0007] The present application further proposes an engine.

[0008] The present application further proposes a vehicle.

[0009] The cylinder head according to the present application includes a water jacket, wherein the water jacket includes a lower cooling water jacket and an upper cooling water jacket, wherein the lower cooling water jacket is connected to the upper cooling water jacket, the lower cooling water jacket is provided with a liquid inlet, and the upper cooling water jacket is provided with a liquid outlet.

[0010] According to the cylinder head of the present application, after the coolant enters the water jacket, it first completely enters the lower cooling water jacket. In this way, the coolant can first cool down the combustion chamber, spark plugs, exhaust ducts and other parts in the surrounding area of ​​the lower cooling water jacket, and then flow out through the upper cooling water jacket. The cooling path of the coolant is more reasonable and effective, and can better remove heat from parts such as the combustion chamber, spark plugs and exhaust ducts, thereby improving the cooling effect of parts such as the combustion chamber, spark plugs and exhaust ducts.

[0011] In some examples of the present application, the water jacket further includes: a middle cooling water jacket connected between the lower cooling water jacket and the upper cooling water jacket, so that the coolant of the lower cooling water jacket enters the upper cooling water jacket through the middle cooling water jacket.

[0012] In some examples of the present application, the cylinder head further includes: an exhaust duct, the middle cooling water jacket is arranged at the exhaust duct, the lower cooling water jacket is arranged on one side of the exhaust duct, and the upper cooling water jacket is arranged on a side of the exhaust duct away from the lower cooling water jacket.

[0013] In some examples of the present application, the exhaust duct includes: an upper exhaust duct and a lower exhaust duct, the middle cooling water jacket is arranged between the upper exhaust duct and the lower exhaust duct, the upper cooling water jacket is arranged on a side of the upper exhaust duct away from the middle cooling water jacket, and the lower cooling water jacket is arranged on a side of the lower exhaust duct away from the middle cooling water jacket.

[0014] In some examples of the present application, in the direction from the front end to the rear end of the engine, the exhaust duct is located in the middle position of a side of the upper cooling water jacket adjacent to the lower cooling water jacket, and the liquid outlet is arranged away from the exhaust duct.

[0015] In some examples of the present application, the lower cooling water jacket is provided with a first lower liquid outlet, a second lower liquid outlet and a third lower liquid outlet, and the first lower liquid outlet, the second lower liquid outlet and the third lower liquid outlet are spaced apart; the middle cooling water jacket is provided with a middle liquid inlet and a middle liquid outlet, the middle liquid inlet is connected to the middle liquid outlet, and the middle liquid inlet is connected to the first lower liquid outlet, and the middle liquid outlet is connected to the second lower liquid outlet; the upper cooling water jacket is provided with a first upper liquid inlet, a second upper liquid inlet and a third upper liquid inlet, and the first upper liquid inlet, the second upper liquid inlet and the third upper liquid inlet are spaced apart, the first upper liquid inlet is connected to the middle liquid inlet, the second upper liquid inlet is connected to the middle liquid outlet, and the third upper liquid inlet is connected to the third lower liquid outlet.

[0016] In some examples of the present application, the cylinder head also includes: a first sealing member, the upper cooling water jacket is also provided with an upper water jacket sand cleaning hole, and the outer sides of the first upper liquid inlet, the middle liquid inlet and the first lower liquid outlet interface, the outer sides of the second upper liquid inlet, the middle liquid outlet and the second lower liquid outlet interface, and the outer sides of the third upper liquid inlet and the third lower liquid outlet interface are all formed with sand cleaning ports, and the first sealing member is sealed at the upper water jacket sand cleaning hole and the sand cleaning ports.

[0017] In some examples of the present application, in the direction from the front end to the rear end of the engine, the third upper liquid inlet, the second upper liquid inlet and the first upper liquid inlet are arranged in sequence, and compared with the first upper liquid inlet, the liquid outlet is arranged away from the third upper liquid inlet, the flow area of ​​the first upper liquid inlet is s1, the flow area of ​​the second upper liquid inlet is s2, and the flow area of ​​the third upper liquid inlet is s3, and the relationship between s1, s2 and s3 is: s1<s2<s3.

[0018] In some examples of this application, the value range of s1 is: 25mm 2 ≤s1≤40mm 2 , the value range of s2 is: 200mm 2 ≤s2≤220mm 2 , the value range of s3 is: 300mm 2 ≤s3≤330mm 2 .

[0019] In some examples of the present application, the liquid inlet includes: a first liquid inlet, a second liquid inlet, a third liquid inlet and a fourth liquid inlet. In the direction from the front end to the rear end of the engine, the first liquid inlet, the second liquid inlet, the third liquid inlet and the fourth liquid inlet are arranged in sequence, the flow area of ​​the first liquid inlet is S1, the flow area of ​​the second liquid inlet is S2, the flow area of ​​the third liquid inlet is S3, and the flow area of ​​the fourth liquid inlet is S4. The relationship between S1, S2, S3 and S4 is: S1<S4<S3≤S2.

[0020] In some examples of this application, the value range of S1 is: 40mm 2 ≤S1≤50mm 2 , the value range of S2 is: 120mm 2 ≤S2≤160mm 2 The value range of S3 is: 120mm 2 ≤S3≤140mm 2 , the value range of S4 is: 80mm 2 ≤S4≤100mm 2 .

[0021] In some examples of the present application, the cylinder head further includes: a support member and a second sealing member, wherein the support member is arranged on a side of the lower cooling water jacket away from the upper cooling water jacket, and the support member is supported at an end of the upper cooling water jacket adjacent to the lower cooling water jacket, and the second sealing member is sealed at the support member.

[0022] In some examples of the present application, a degassing hole is provided on the top of the upper cooling water jacket.

[0023] In some examples of the present application, the lower cooling water jacket is further provided with a cylinder liquid outlet, and the cylinder liquid outlet is communicated with the liquid outlet.

[0024] The engine according to the present application includes: the cylinder head described above.

[0025] The vehicle according to the present application includes: the engine described above.

[0026] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] FIG1 is a schematic structural diagram of a cylinder head at a first angle according to an embodiment of the present application;

[0029] Figure 2 is an exploded view of the water jacket;

[0030] FIG3 is a schematic diagram of the partial structure of the water jacket;

[0031] FIG4 is a schematic structural diagram of the upper cooling water jacket;

[0032] FIG5 is a schematic structural diagram of the lower cooling water jacket;

[0033] FIG6 is a schematic structural diagram of a cylinder head at a second angle according to an embodiment of the present application;

[0034] FIG7 is a schematic block diagram of an engine according to an embodiment of the present application;

[0035] FIG8 is a schematic block diagram of a vehicle according to an embodiment of the present application.

[0036] Reference numerals:

[0037] Vehicle 1000,

[0038] Engine 100

[0039] Cylinder head 1,

[0040] Exhaust duct 10, upper exhaust duct 11, lower exhaust duct 12, water jacket 20, lower cooling water jacket 21, liquid inlet 210, first lower liquid outlet 211, second lower liquid outlet 212, third lower liquid outlet 213, first liquid inlet 214, second liquid inlet 215, third liquid inlet 216, fourth liquid inlet 217, cylinder body liquid outlet 218, middle cooling water jacket 22, middle liquid inlet 220, middle liquid outlet 221, upper cooling water jacket 23, liquid outlet 230, first upper liquid inlet 231, second upper liquid inlet 232, third upper liquid inlet 233, upper water jacket sand cleaning hole 234, degassing hole 235, first sealing member 30, support member 40, second sealing member 50,. DETAILED DESCRIPTION

[0041] The following describes in detail embodiments of the present application, and the embodiments described with reference to the accompanying drawings are exemplary.

[0042] The following describes a cylinder head 1 according to an embodiment of the present application with reference to Figures 1 to 6. The cylinder head 1 is provided with a combustion chamber nose bridge area and a combustion chamber and other structures. In addition, a spark plug is also installed in the cylinder head 1.

[0043] As shown in Figures 1 and 6, the cylinder head 1 according to the embodiment of the present application includes an exhaust passage 10 and a water jacket 20. The exhaust passage 10 is a passage for exhaust in the cylinder head 1, and the water jacket 20 is a hollow structure formed inside the cylinder head 1. The water jacket 20 can also be called a cooling water passage or cooling flow passage. Coolant can circulate in the water jacket 20, transferring heat from the engine combustion chamber and the inner wall of the cylinder to the coolant through heat conduction. Since the liquid is flowable, it is circulated to the radiator through a water pump. The radiator dissipates heat to the coolant through the flow of external air. The coolant after dissipation is then circulated to the water jacket 20 to continue to receive heat generated by the engine when it is working, and the cycle continues.

[0044] As shown in Figures 1, 2, and 6, the water jacket 20 includes a lower cooling water jacket 21, a middle cooling water jacket 22, and an upper cooling water jacket 23. The upper cooling water jacket 23, the middle cooling water jacket 22, and the lower cooling water jacket 21 are arranged in sequence in the vertical direction. The lower cooling water jacket 21 is located on one side of the exhaust duct 10, that is, at the lower end of the exhaust duct 10. A liquid inlet 210 is provided on the side of the lower cooling water jacket 21 away from the exhaust duct 10. The upper cooling water jacket 23 is located on the side of the exhaust duct 10 away from the lower cooling water jacket 21, that is, at the upper end of the exhaust duct 10. A liquid outlet 230 is provided on the upper cooling water jacket 23. The middle cooling water jacket 22 is located in the exhaust duct 10 and is connected between the lower cooling water jacket 21 and the upper cooling water jacket 23, so that coolant from the lower cooling water jacket 21 can enter the upper cooling water jacket 23 through the middle cooling water jacket 22.

[0045] The lower cooling water jacket 21, the middle cooling water jacket 22, and the upper cooling water jacket 23 constitute the main body of the water jacket 20. The lower cooling water jacket 21 is generally located at the lower end of the cylinder head 1. The lower end of the cylinder head 1 mainly houses the combustion chamber and spark plugs. This lower cooling water jacket 21 can cool the combustion chamber and spark plugs, preventing them from overheating, thereby reducing thermal stress and thermal deformation in the engine and improving engine reliability. The upper cooling water jacket 23 is generally located at the upper end of the cylinder head 1. The upper end of the cylinder head 1 mainly houses the exhaust duct. This allows the upper cooling water jacket 23 to better discharge exhaust gas from the exhaust duct and reduce exhaust temperature.

[0046] In addition, the lower cooling water jacket 21 is arranged at the lower end of the exhaust duct 10, the upper cooling water jacket 23 is arranged at the upper end of the exhaust duct 10, and the middle cooling water jacket 22 is arranged at the exhaust duct 10. In this way, the lower cooling water jacket 21 can cool the exhaust duct 10 at the lower end of the exhaust duct 10, the upper cooling water jacket 23 can cool the exhaust duct 10 at the upper end of the exhaust duct 10, and the middle cooling water jacket 22 can cool the exhaust duct 10, so that the exhaust duct 10 can be better exhausted and the exhaust temperature can be reduced.

[0047] Specifically, coolant enters the water jacket 20 through the liquid inlet 210 of the lower cooling water jacket 21. At this point, the coolant's temperature is relatively low, while the temperatures in the combustion chamber and spark plug areas at the lower end of the cylinder head 1 are higher. The lower cooling water jacket 21 is primarily located at the lower end of the cylinder head 1, allowing the coolant to effectively reduce the temperature in the area corresponding to the lower end of the cylinder head 1. Coolant that has completely flowed through the lower cooling water jacket 21 can then pass through the middle cooling water jacket 22 to the upper cooling water jacket 23. It should be noted that the coolant temperature after passing through the lower cooling water jacket 21 is relatively high, while the temperatures in the exhaust duct and exhaust passage 10 are relatively low compared to the temperatures in the combustion chamber and spark plug areas. The middle cooling water jacket 22 cools the exhaust passage 10, while the upper cooling water jacket 23 cools the exhaust duct and exhaust passage 10. The upper cooling water jacket 23 covers a larger area of ​​the exhaust duct and exhaust passage 10, which improves the cooling effect of the coolant in the upper cooling water jacket 23 on the exhaust duct and exhaust passage 10. The upper cooling water jacket 23 is provided with a liquid outlet 230 . After the coolant flows through the upper cooling water jacket 23 , it can flow out of the cylinder head 1 through the liquid outlet 230 .

[0048] Therefore, after the coolant enters the water jacket 20, it first completely enters the lower cooling water jacket 21, and then enters the upper cooling water jacket 23 through the middle cooling water jacket 22. In this way, the coolant can better cool down the combustion chamber and spark plugs at the lower end of the cylinder head 1, and the cooling path of the coolant is more reasonable and effective. In addition, the middle cooling water jacket 22 is provided, and the middle cooling water jacket 22 is provided at the exhaust duct 10. In this way, the cooling effect of the exhaust duct 10 can be improved, so that the exhaust duct 10 can be better exhausted and the exhaust temperature can be reduced.

[0049] As shown in Figures 1 and 6 , the exhaust duct 10 includes an upper exhaust duct 11 and a lower exhaust duct 12. A middle cooling water jacket 22 is disposed between the upper and lower exhaust ducts 11, 12. The upper cooling water jacket 23 is disposed on the side of the upper exhaust duct 11 away from the middle cooling water jacket 22, that is, at the upper end of the upper exhaust duct 11. The lower cooling water jacket 21 is disposed on the side of the lower exhaust duct 12 away from the middle cooling water jacket 22, that is, at the lower end of the lower exhaust duct 12. Both the upper exhaust duct 11 and the lower exhaust duct 12 can function as exhaust ducts. The upper cooling water jacket 23 is disposed at the upper end of the upper exhaust duct 11, and the lower cooling water jacket 21 is disposed at the lower end of the lower exhaust duct 12. In this way, the upper cooling water jacket 23 can cool the upper end of the upper exhaust duct 11, and the lower cooling water jacket 21 can cool the lower end of the lower exhaust duct 12. The middle cooling water jacket 22 is disposed between the upper exhaust duct 11 and the lower exhaust duct 12. In this way, the middle cooling water jacket 22 can cool both the lower end of the upper exhaust duct 11 and the upper end of the lower exhaust duct 12. This improves the cooling effect on the exhaust duct 10, thereby enabling the exhaust duct 10 to exhaust better and reduce the exhaust temperature.

[0050] Furthermore, as shown in FIG1 , the exhaust duct 10 is located in the middle of the side of the upper cooling water jacket 23 adjacent to the lower cooling water jacket 21, i.e., in the middle of the lower end of the upper cooling water jacket 23, as viewed from the front to the rear of the engine. The liquid outlet 230 is positioned away from the exhaust duct 10. It should be noted that the temperature in the exhaust duct 10 is very high, and a thermostat seat is located at the liquid outlet 230. However, the thermostat seat is made of plastic and has poor temperature resistance. The location of the exhaust duct 10 in the middle of the lower end of the upper cooling water jacket 23 facilitates the installation of the exhaust duct 10. The liquid outlet 230 is positioned away from the exhaust duct 10, thereby protecting the thermostat seat from the high-temperature exhaust gas from the exhaust duct 10 and thereby preventing damage to the thermostat seat.

[0051] Specifically, as shown in Figures 2, 4, and 5, the lower cooling water jacket 21 is provided with a first lower liquid outlet 211, a second lower liquid outlet 212, and a third lower liquid outlet 213, which are spaced apart from each other. The middle cooling water jacket 22 is provided with a middle liquid inlet 220 and a middle liquid outlet 221. The middle liquid inlet 220 is connected to the middle liquid outlet 221, and the middle liquid inlet 220 is connected to the first lower liquid outlet 211, and the middle liquid outlet 221 is connected to the second lower liquid outlet 212. The upper cooling water jacket 23 is provided with a first upper liquid inlet 231, a second upper liquid inlet 232 and a third upper liquid inlet 233. The first upper liquid inlet 231, the second upper liquid inlet 232 and the third upper liquid inlet 233 are arranged at intervals. The first upper liquid inlet 231 is connected to the middle liquid inlet 220, the second upper liquid inlet 232 is connected to the middle liquid outlet 221, and the third upper liquid inlet 233 is connected to the third lower liquid outlet 213.

[0052] That is to say, the first upper liquid inlet 231, the middle liquid inlet 220 and the first lower liquid outlet 211 can be connected to form a channel, and the coolant in the lower cooling water jacket 21 first flows into the middle liquid inlet 220 through the first lower liquid outlet 211, and a part of the coolant enters the upper cooling water jacket 23 through the first upper liquid inlet 231, and a part of the coolant flows into the middle liquid outlet 221; the second upper liquid inlet 232, the middle liquid outlet 221 and the second lower liquid outlet 212 can be connected to form a channel, and the coolant in the lower cooling water jacket 21 first flows into the middle liquid inlet 220 through the first lower liquid outlet 211, and a part of the coolant flows into the upper cooling water jacket 23 through the first upper liquid inlet 231, and a part of the coolant flows into the middle liquid outlet 221; The coolant first flows through the second lower liquid outlet 212 into the middle liquid outlet 221. The coolant exiting the middle liquid outlet 221 then flows through the second upper liquid inlet 232 into the upper cooling water jacket 23. The third upper liquid inlet 233 and the third lower liquid outlet 213 can be connected to form a channel. This channel does not need to pass through the middle cooling water jacket 22. The coolant in the lower cooling water jacket 21 flows directly through the third lower liquid outlet 213 into the third upper liquid inlet 233, and then enters the upper cooling water jacket 23 through the third upper liquid inlet 233. In this way, the coolant in the lower cooling water jacket 21 can be introduced into different locations of the upper cooling water jacket 23, thereby effectively cooling the corresponding areas of the upper cooling water jacket 23.

[0053] Of course, as shown in Figures 1 and 2, the cylinder head 1 further includes a first sealing member 30, and the upper cooling water jacket 23 is further provided with an upper water jacket sand cleaning hole 234. Furthermore, sand cleaning holes are formed on the outside of the interface between the first upper liquid inlet 231, the middle liquid inlet 220, and the first lower liquid outlet 211; on the outside of the interface between the second upper liquid inlet 232, the middle liquid outlet 221, and the second lower liquid outlet 212; and on the outside of the interface between the third upper liquid inlet 233 and the third lower liquid outlet 213. The first sealing member 30 seals against the upper water jacket sand cleaning hole 234 and the sand cleaning holes.

[0054] It should be noted that an upper water jacket sand cleaning hole 234 is also provided on the upper cooling water jacket 23, which facilitates sand cleaning during casting of the cylinder head 1. Sand cleaning ports are formed on the outside of the interface between the first upper liquid inlet 231, the middle liquid inlet 220 and the first lower liquid outlet 211, the outside of the interface between the second upper liquid inlet 232, the middle liquid outlet 221 and the second lower liquid outlet 212, and the outside of the interface between the third upper liquid inlet 233 and the third lower liquid outlet 213. Similarly, the sand cleaning ports can facilitate the pouring out of sand after the cylinder head 1 is cast, thereby forming the inner cavity of the water jacket 20. Since the interfaces of the first upper liquid inlet 231, the middle liquid inlet 220 and the first lower liquid outlet 211, the interfaces of the second upper liquid inlet 232, the middle liquid outlet 221 and the second lower liquid outlet 212, and the interfaces of the third upper liquid inlet 233 and the third lower liquid outlet 213 need to be connected to facilitate the flow of the coolant, a first sealing member 30 can be provided at the upper water jacket sand cleaning hole 234 and the sand cleaning outlet. The first sealing member 30 can play a sealing role, thereby preventing the coolant in the upper cooling water jacket 23 from leaking out through the sand cleaning hole and the sand cleaning outlet, thereby affecting the cooling effect of the upper cooling water jacket 23. Of course, the lower cooling water jacket 21 is also provided with a lower water jacket sand cleaning hole, which is connected to other structures to play a sealing role.

[0055] According to an optional embodiment of the present application, as shown in Figure 5, in the direction from the front end to the rear end of the engine, the third upper liquid inlet 233, the second upper liquid inlet 232 and the first upper liquid inlet 231 are arranged in sequence, and compared with the first upper liquid inlet 231, the liquid outlet 230 is arranged away from the third upper liquid inlet 233, the flow area of ​​the first upper liquid inlet 231 is s1, the flow area of ​​the second upper liquid inlet 232 is s2, and the flow area of ​​the third upper liquid inlet 233 is s3, and the relationship between s1, s2 and s3 is: s1<s2<s3.

[0056] It can be understood that, since the third upper liquid inlet 233, the second upper liquid inlet 232, and the first upper liquid inlet 231 are spaced apart in sequence from the front end to the rear end of the engine, and the third upper liquid inlet 233 is farther from the liquid outlet 230, the second upper liquid inlet 232 is closer, and the first upper liquid inlet 231 is closest, and the flow area of ​​the first upper liquid inlet 231 is smaller than that of the second upper liquid inlet 232, and the flow area of ​​the second upper liquid inlet 232 is smaller than that of the third upper liquid inlet 233, as much coolant as possible can enter the upper cooling water jacket 23 through the third upper liquid inlet 233. Thus, after the coolant enters the upper cooling water jacket 23 through the third upper liquid inlet 233, since it is at the farthest distance from the liquid outlet 230, the coolant flows through a wider range of the upper cooling water jacket 23, thereby better cooling the corresponding area of ​​the upper cooling water jacket 23.

[0057] Furthermore, the value range of s1 is: 25mm 2 ≤s1≤40mm 2 , the value range of s2 is: 200mm 2 ≤s2≤220mm 2 , the value range of s3 is: 300mm 2 ≤s3≤330mm 2 That is to say, according to the experimental data, when the flow area of ​​the first upper liquid inlet 231 is within the range of 25mm 2 -40mm 2 The flow area of ​​the second upper liquid inlet 232 is in the range of 200mm 2 -220mm 2 , and the flow area of ​​the third upper liquid inlet 233 is in the range of 300mm 2 -330mm 2 When the cooling liquid flows into the upper cooling water jacket 23 more comprehensively, it can be ensured that different areas corresponding to the upper cooling water jacket 23 are cooled and lowered.

[0058] Optionally, as shown in Figure 4, the liquid inlet 210 includes: a first liquid inlet 214, a second liquid inlet 215, a third liquid inlet 216 and a fourth liquid inlet 217. In the direction from the front end to the rear end of the engine, the first liquid inlet 214, the second liquid inlet 215, the third liquid inlet 216 and the fourth liquid inlet 217 are arranged in sequence, the flow area of ​​the first liquid inlet 214 is S1, the flow area of ​​the second liquid inlet 215 is S2, the flow area of ​​the third liquid inlet 216 is S3, and the flow area of ​​the fourth liquid inlet 217 is S4. The relationship between S1, S2, S3 and S4 is: S1<S4<S3≤S2.

[0059] It should be noted that the first liquid inlet 214, the second liquid inlet 215, the third liquid inlet 216 and the fourth liquid inlet 217 correspond to four cylinders respectively, among which the flow rate of the coolant at the first liquid inlet 214 is the fastest, followed by the fourth liquid inlet 217, and slower at the third liquid inlet 216 and the second liquid inlet 215. The flow area of ​​the first liquid inlet 214 is the smallest, the flow area of ​​the fourth liquid inlet 217 is the second, and the flow areas of the third liquid inlet 216 and the second liquid inlet 215 are larger. In this way, the flow of the coolant entering the lower cooling water jacket 21 through the first liquid inlet 214, the second liquid inlet 215, the third liquid inlet 216 and the fourth liquid inlet 217 can be more balanced, so that the corresponding area of ​​the lower cooling water jacket 21 can be evenly cooled and the cooling effect of the lower cooling water jacket 21 can be improved.

[0060] Furthermore, the value range of S1 is: 40mm 2 ≤S1≤50mm 2, the value range of S2 is: 120mm 2 ≤S2≤160mm 2 , the value range of S3 is: 120mm 2 ≤S3≤140mm 2 , the value range of S4 is: 80mm 2 ≤S4≤100mm 2 That is to say, according to the experimental data, when the flow area of ​​the first liquid inlet 214 is within the range of 40mm 2 -50mm 2 The flow area of ​​the second liquid inlet 215 is in the range of 120mm 2 -160mm 2 The flow area of ​​the third liquid inlet 216 is in the range of 120mm 2 -140mm 2 , and the flow area of ​​the fourth liquid inlet 217 is in the range of 80mm 2 -100mm 2 When the cooling liquid is lowered, the cooling liquid can flow into the lower cooling water jacket 21 more evenly, thereby ensuring that the cooling liquid has the same cooling effect on different areas corresponding to the lower cooling water jacket 21.

[0061] In addition, as shown in FIG3 , the cylinder head 1 further includes a support member 40 and a second sealing member 50. The support member 40 is disposed on a side of the lower cooling water jacket 21 away from the upper cooling water jacket 23 and supported by an end of the upper cooling water jacket 23 adjacent to the lower cooling water jacket 21. The second sealing member 50 is sealed against the support member 40. The support member 40 serves a supporting function. By disposing the support member 40 on a side of the lower cooling water jacket 21 away from the upper cooling water jacket 23 and supporting an end of the upper cooling water jacket 23 adjacent to the lower cooling water jacket 21, the support member 40 can be used to support the upper cooling water jacket 23. Machining is then performed on the support member 40 and the second sealing member 50 is used to seal the support member 40. This prevents coolant from entering the upper cooling water jacket 23 through the support member 40, thereby dispersing the coolant flow rate of the lower cooling water jacket 21 and affecting the overall cooling effect of the water jacket 20.

[0062] Of course, as shown in Figures 2, 3, and 5, a degassing hole 235 is provided at the top of the upper cooling water jacket 23. It is understood that due to the high temperature of the coolant in the water jacket 20, bubbles are generated. The degassing hole 235 provided at the top of the upper cooling water jacket 23 allows the generated bubbles to be discharged through the degassing hole 235, thereby preventing the cylinder head 1 from being damaged by cavitation.

[0063] In addition, as shown in Figures 2 and 3, the lower cooling water jacket 21 is further provided with a cylinder body liquid outlet 218, which is connected to the liquid outlet 230. The lower cooling water jacket 21 is further provided with a cylinder body liquid outlet 218, through which the coolant cooling the cylinder body can be discharged. The cylinder body liquid outlet 218 is connected to the liquid outlet 230, so that the coolant cooling the cylinder body can flow back to the liquid outlet 230, merge with the coolant in the water jacket 20, flow to the thermostat seat, and then enter the cooling system circuit, thereby completing the cooling cycle process.

[0064] The engine 100 according to an embodiment of the present application includes: a cylinder head 1 according to any one of the above embodiments, as shown in FIG7 .

[0065] A vehicle 1000 according to an embodiment of the present application includes: the engine 100 of the above embodiment, as shown in FIG8 .

[0066] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0067] In the description of the present application, "first feature" and "second feature" may include one or more of the features. In the description of the present application, "plurality" means two or more. In the description of the present application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. In the description of the present application, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0068] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0069] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A cylinder head (1), characterized in that: include: A water jacket (20), the water jacket (20) comprising a lower cooling water jacket (21) and an upper cooling water jacket (23), the lower cooling water jacket (21) being in communication with the upper cooling water jacket (23), the lower cooling water jacket (21) being provided with a liquid inlet (210), and the upper cooling water jacket (23) being provided with a liquid outlet (230).

2. The cylinder head (1) according to claim 1, characterized in that The water jacket (20) further comprises: a middle cooling water jacket (22), wherein the middle cooling water jacket (22) is connected between the lower cooling water jacket (21) and the upper cooling water jacket (23), so that the coolant of the lower cooling water jacket (21) enters the upper cooling water jacket (23) through the middle cooling water jacket (22).

3. The cylinder head (1) according to claim 2, characterized in that Also includes: An exhaust duct (10), the middle cooling water jacket (22) being arranged at the exhaust duct (10), the lower cooling water jacket (21) being arranged at one side of the exhaust duct (10), and the upper cooling water jacket (23) being arranged at a side of the exhaust duct (10) away from the lower cooling water jacket (21).

4. The cylinder head (1) according to claim 3, characterized in that The exhaust duct (10) comprises: an upper exhaust duct (11) and a lower exhaust duct (12); the middle cooling water jacket (22) is arranged between the upper exhaust duct (11) and the lower exhaust duct (12); the upper cooling water jacket (23) is arranged on a side of the upper exhaust duct (11) away from the middle cooling water jacket (22); and the lower cooling water jacket (21) is arranged on a side of the lower exhaust duct (12) away from the middle cooling water jacket (22).

5. The cylinder head (1) according to claim 3 or 4, characterized in that In the direction from the front end to the rear end of the engine, the exhaust passage (10) is located in the middle position of a side of the upper cooling water jacket (23) adjacent to the lower cooling water jacket (21), and the liquid outlet (230) is arranged away from the exhaust passage (10).

6. The cylinder head (1) according to any one of claims 2 to 5, characterized in that: The lower cooling water jacket (21) is provided with a first lower liquid outlet (211), a second lower liquid outlet (212) and a third lower liquid outlet (213), and the first lower liquid outlet (211), the second lower liquid outlet (212) and the third lower liquid outlet (213) are arranged at intervals; The middle cooling water jacket (22) is provided with a middle liquid inlet (220) and a middle liquid outlet (221), the middle liquid inlet (220) is connected to the middle liquid outlet (221), the middle liquid inlet (220) is connected to the first lower liquid outlet (211), and the middle liquid outlet (221) is connected to the second lower liquid outlet (212); The upper cooling water jacket (23) is provided with a first upper liquid inlet (231), a second upper liquid inlet (232) and a third upper liquid inlet (233); the first upper liquid inlet (231), the second upper liquid inlet (232) and the third upper liquid inlet (233) are arranged at intervals; the first upper liquid inlet (231) is connected to the middle liquid inlet (220); the second upper liquid inlet (232) is connected to the middle liquid outlet (221); and the third upper liquid inlet (233) is connected to the third lower liquid outlet (213).

7. The cylinder head (1) according to claim 6, characterized in that Also includes: A first sealing member (30), the upper cooling water jacket (23) is further provided with an upper water jacket sand cleaning hole (234), and sand cleaning ports are formed on the outer side of the interface between the first upper liquid inlet (231), the middle liquid inlet (220) and the first lower liquid outlet (211), the outer side of the interface between the second upper liquid inlet (232), the middle liquid outlet (221) and the second lower liquid outlet (212), and the outer side of the interface between the third upper liquid inlet (233) and the third lower liquid outlet (213), and the first sealing member (30) is sealed at the upper water jacket sand cleaning hole (234) and the sand cleaning ports.

8. The cylinder head (1) according to claim 6 or 7, characterized in that In the direction from the front end to the rear end of the engine, the third upper liquid inlet (233), the second upper liquid inlet (232) and the first upper liquid inlet (231) are arranged in sequence and spaced apart, and compared with the first upper liquid inlet (231), the liquid outlet (230) is arranged away from the third upper liquid inlet (233), the flow area of ​​the first upper liquid inlet (231) is s1, the flow area of ​​the second upper liquid inlet (232) is s2, and the flow area of ​​the third upper liquid inlet (233) is s3, and the relationship among s1, s2 and s3 is: s1<s2<s3.

9. The cylinder head (1) according to claim 8, characterized in that The value range of s1 is: 25mm 2 ≤s1≤40mm 2 , the value range of s2 is: 200mm 2 ≤s2≤220mm 2 , the value range of s3 is: 300mm 2 ≤s3≤330mm 2 .

10. The cylinder head (1) according to any one of claims 1 to 9, characterized in that: The liquid inlet (210) comprises: a first liquid inlet (214), a second liquid inlet (215), a third liquid inlet (216) and a fourth liquid inlet (217); in a direction from the front end to the rear end of the engine, the first liquid inlet (214), the second liquid inlet (215), the third liquid inlet (216) and the fourth liquid inlet (217) are arranged in sequence; a flow area of ​​the first liquid inlet (214) is S1, a flow area of ​​the second liquid inlet (215) is S2, a flow area of ​​the third liquid inlet (216) is S3, and a flow area of ​​the fourth liquid inlet (217) is S4; the relationship among S1, S2, S3 and S4 is: S1<S4<S3≤S2.

11. The cylinder head (1) according to claim 10, characterized in that The value range of S1 is: 40mm 2 ≤S1≤50mm 2 , the value range of S2 is: 120mm 2 ≤S2≤160mm 2 , the value range of S3 is: 120mm 2 ≤S3≤140mm 2 , the value range of S4 is: 80mm 2 ≤S4≤100mm 2 .

12. The cylinder head (1) according to any one of claims 1 to 11, characterized in that: Also includes: a support member (40), the support member (40) being arranged on a side of the lower cooling water jacket (21) away from the upper cooling water jacket (23), and the support member (40) being supported on an end of the upper cooling water jacket (23) adjacent to the lower cooling water jacket (21); and A second sealing member (50), wherein the second sealing member (50) is sealed at the supporting member (40).

13. The cylinder head (1) according to any one of claims 1 to 12, characterized in that: A degassing hole (235) is provided at the top of the upper cooling water jacket (23).

14. The cylinder head (1) according to any one of claims 1 to 13, characterized in that The lower cooling water jacket (21) is also provided with a cylinder body liquid outlet (218), and the cylinder body liquid outlet (218) is connected to the liquid outlet (230).

15. An engine (100), characterized in that: include: A cylinder head (1) according to any one of claims 1 to 14.

16. A vehicle (1000), characterized in that: include: The engine (100) according to claim 15.

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