Cylinder cover, engine and vehicle

Abstract

The utility model discloses a cylinder cover, an engine and a vehicle. The cylinder cover comprises an upper layer water jacket, a lower layer water jacket and an upper layer water jacket; the lower-layer water jacket is positioned below the upper-layer water jacket and is communicated with the upper-layer water jacket; the first water inlet flow path is respectively communicated with the upper-layer water jacket and the lower-layer water jacket; a first water squeezing part which is sunken is arranged at the joint of the lower-layer water jacket and the first water inlet flow path or one side, adjacent to the first water inlet flow path, of the lower-layer water jacket, so that the flow, flowing into the upper-layer water jacket, of the first water inlet flow path is larger than the flow, flowing into the lower-layer water jacket, of the first water inlet flow path. Therefore, by arranging the cylinder cover, the cooling effect of the water jacket can be improved, the service life of the cylinder cover can be prolonged, and the cylinder cover is simple in structure, easy to manufacture and low in production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a cylinder head, an engine and a vehicle. Background Art

[0002] When the engine is working, a lot of heat will be generated due to the combustion in the cylinder, so the engine needs to be cooled. The cylinder head cooling water jacket is the most commonly used and effective cooling method, which can be used to reduce the temperature of the cylinder head and take away the heat generated by the combustion of fuel in the cylinder. In order to better cool the cylinder head during operation and avoid overheating of the cylinder head that affects the economy and power of the engine, it is necessary to integrally cast a water flow channel inside the cylinder head for coolant circulation and cooling.

[0003] In the related technology, the current cooling system mostly adopts the method of transferring coolant from the cylinder block to the cylinder head, that is, the coolant first cools the cylinder block, then passes through the cylinder block and the cylinder gasket in sequence and then flows upward to the cylinder head for cooling. Such a coolant transfer path makes the cooling effect inefficient and easily causes the risk of increased thermal load on the cylinder head, and in severe cases, a series of faults such as cylinder head cracking may occur. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a cylinder head, which can improve the cooling effect of the water jacket and the service life of the cylinder head.

[0005] Therefore, by providing the cylinder head, the cooling effect of the water jacket and the service life of the water jacket can be improved, and the cylinder head has a simple structure, is easy to manufacture, and has a low production cost.

[0006] The utility model further provides an engine.

[0007] The utility model further provides a vehicle.

[0008] According to the first aspect of the utility model, the cylinder head comprises: an upper water jacket; a lower water jacket, the lower water jacket being located below the upper water jacket and being communicated with the upper water jacket; a first water inlet flow path, the first water inlet flow path being communicated with the upper water jacket and the lower water jacket respectively; wherein a first concave water squeezing portion is provided at the connection between the lower water jacket and the first water inlet flow path or at a side of the lower water jacket adjacent to the first water inlet flow path, so that the flow rate of the first water inlet flow path flowing into the upper water jacket is greater than the flow rate flowing into the lower water jacket.

[0009] In some examples of the present invention, the cylinder head further includes: a second water inlet flow path, the second water inlet flow path is connected to the upper water jacket and the lower water jacket respectively, and the second water inlet flow path is spaced apart from the first water inlet flow path; wherein a recessed second water squeezing portion is provided at the connection between the upper water jacket and the second water inlet flow path or on a side of the upper water jacket adjacent to the second water inlet flow path, so that the flow rate of the second water inlet flow path flowing into the lower water jacket is greater than the flow rate flowing into the upper water jacket.

[0010] In some examples of the present invention, a third water squeezing portion is provided at the connection between the upper water jacket and the lower water jacket, and the third water squeezing portion is adjacent to the first water inlet flow path and is recessed toward a side close to the second water inlet flow path.

[0011] In some examples of the present invention, the lower water jacket is provided with a first guide portion, the first guide portion is located at one end of the lower water jacket adjacent to the first water inlet flow path, and the first guide portion extends obliquely toward the center of the lower water jacket; and / or the lower water jacket is provided with a second guide portion, the second guide portion is located at one end of the lower water jacket adjacent to the second water inlet flow path, and the second guide portion extends obliquely toward the center of the lower water jacket.

[0012] In some examples of the present invention, the lower water jacket is provided with a plurality of lower exhaust valve avoidance holes, and the arrangement direction of the plurality of lower exhaust valve avoidance holes is a first direction; the angle between the first guide portion and the first direction is α, and the α satisfies the relationship: 40°≤α≤50°; and / or the angle between the second guide portion and the first direction is β, and the β satisfies the relationship: 40°≤β≤50°.

[0013] In some examples of the present invention, the upper water jacket and the lower water jacket are formed with a connecting hole penetrating in the up and down directions, and at least one side of the connecting hole is provided with a third guide portion penetrating the connection between the upper water jacket and the lower water jacket.

[0014] In some examples of the present invention, the lower water jacket is provided with a plurality of lower exhaust valve avoidance holes, and a fourth air guide portion is provided between adjacent lower exhaust valve avoidance holes; and / or

[0015] The upper water jacket is provided with a plurality of upper exhaust valve avoidance holes, and a fifth air guide portion is provided between adjacent upper exhaust valve avoidance holes.

[0016] In some examples of the present invention, the upper water jacket and the lower water jacket are formed with a connecting hole penetrating in the up-down direction, the lower water jacket is provided with a plurality of lower exhaust valve avoidance holes, the connecting holes are connected with a sixth guide portion, the sixth guide portion is recessed toward the area between two adjacent lower exhaust valve avoidance holes and is triangular in shape; and / or

[0017] One side of the lower water jacket is connected with a water outlet hole and the other side is connected with a sand cleaning hole. One end of the lower water jacket adjacent to the sand cleaning hole is provided with a through hole penetrating the lower water jacket.

[0018] An engine according to a second aspect of the utility model comprises: the above-mentioned cylinder head.

[0019] A vehicle according to a third aspect of the utility model comprises: the above-mentioned engine.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a top view of a water jacket according to an embodiment of the utility model;

[0023] Figure 2 It is a schematic structural diagram of a water jacket according to an embodiment of the utility model;

[0024] Figure 3 It is another structural schematic diagram of the water jacket according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] 100, water jacket;

[0027] 10. upper water jacket; 11. upper exhaust valve avoidance hole; 20. lower water jacket; 21. first guide part;

[0028] 22. second flow guide; 30. first water inlet flow path; 40. first water squeezing part;

[0029] 50, second water inlet flow path; 60, second water squeezing portion; 61, third water squeezing portion; 70, connecting hole;

[0030] 80, third guide portion; 81, fifth guide portion; 82, sixth guide portion;

[0031] 90. Water outlet hole; 91. Sand cleaning hole; 92. Through hole. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.

[0033] Reference below Figure 1-Figure 3 A cylinder head according to an embodiment of the utility model is described, which can improve the cooling effect of the water jacket and the service life of the cylinder head.

[0034] Combination Figure 1-Figure 3 As shown, the cylinder head (not shown) according to the first embodiment of the utility model comprises an upper water jacket 10, a lower water jacket 20 and a first water inlet flow path 30. The upper water jacket 10 and the lower water jacket 20 mainly serve to increase the cooling path length and heat dissipation area of ​​the cooling medium, thereby improving the cooling effect of the water jacket 100. The first water inlet flow path 30 provides a flow route for the cooling medium to enter the upper water jacket 10 and the lower water jacket 20.

[0035] Specifically, the lower water jacket 20 is located below the upper water jacket 10, and the lower water jacket 20 is connected to the upper water jacket 10, and the first water inlet flow path 30 is respectively connected to the upper water jacket 10 and the lower water jacket 20; wherein, a recessed first water squeezing portion 40 is provided at the connection between the lower water jacket 20 and the first water inlet flow path 30 or on one side of the lower water jacket 20 adjacent to the first water inlet flow path 30, so that the flow rate of the first water inlet flow path 30 flowing into the upper water jacket 10 is greater than the flow rate flowing into the lower water jacket 20.

[0036] In detail, a part of the structure of the lower water jacket 20 and a part of the structure of the upper water jacket 10 are spaced in the vertical direction, and another part of the structure of the lower water jacket 20 is kept in communication with another part of the structure of the lower water jacket 20, so that the cooling medium in the upper water jacket 10 and the lower water jacket 20 can be exchanged and flowed between the two, thereby improving the heat exchange and cooling effect of the water jacket 100. Compared with the double-layer water jacket of the split structure, the double-layer water jacket 100 of the integral arrangement is adopted in this embodiment, so that the casting cost can be reduced and the risk of core breakage of the water jacket during the casting process can be avoided. In addition, the integral double-layer water jacket 100 has the advantages of simple structure, easy manufacture and low production cost.

[0037] Optionally, a recessed first water squeezing portion 40 is provided at the connection between the lower water jacket 20 and the first water inlet flow path 30, so that the flow rate of the cooling medium flowing into the lower water jacket 20 can be reduced under the blocking effect of the first water squeezing portion 40, and the flow rate of the cooling medium squeezed into the upper water jacket 10 can be relatively increased. In this way, the problem of insufficient cooling medium flow in the upper water jacket 10 caused by the cooling medium preferentially flowing into the lower water jacket 20 under the action of its own gravity can be overcome, thereby ensuring that there is sufficient cooling medium flow in the upper water jacket 10, thereby enhancing the cooling and heat dissipation effect of the upper water jacket 10 on the cylinder head.

[0038] Therefore, by providing the cylinder head, the cooling effect of the water jacket 100 and its service life can be improved, and the structure is simple, easy to manufacture, and the production cost is low.

[0039] According to some optional embodiments of the present invention, combined with Figure 1-Figure 3 As shown, the cylinder head also includes a second water inlet flow path 50, which is connected to the upper water jacket 10 and the lower water jacket 20 respectively, and the second water inlet flow path 50 is spaced apart from the first water inlet flow path 30; wherein, a recessed second water squeezing portion 60 is provided at the connection between the upper water jacket 10 and the second water inlet flow path 50 or on the side of the upper water jacket 10 adjacent to the second water inlet flow path 50, so that the flow rate of the second water inlet flow path 50 flowing into the lower water jacket 20 is greater than the flow rate flowing into the upper water jacket 10.

[0040] In detail, the second water inlet flow path 50 is spaced apart from the first water inlet flow path 30, and the second water inlet flow path 50 is also connected to the upper water jacket 10 and the lower water jacket 20, respectively. In this way, the number of water inlet flow paths of the water jacket 100 can be increased, thereby increasing the total flow rate of the cooling medium in the water jacket 100 at the same time, thereby improving the cooling efficiency of the water jacket 100.

[0041] Optionally, a recessed second water squeezing portion 60 is provided at the connection between the upper water jacket 10 and the second water inlet flow path 50, so that the flow rate of the cooling medium flowing into the upper water jacket 10 can be reduced under the blocking effect of the second water squeezing portion 60, and the flow rate of the cooling medium squeezed into the lower water jacket 20 can be relatively increased, thereby increasing the flow pressure of the cooling medium in the lower water jacket 20, thereby increasing the flow speed of the cooling medium in the lower water jacket 20, and further enhancing the comprehensive cooling effect of the water jacket 100.

[0042] Specifically, combined Figure 2 As shown, a third water squeezing portion 61 is provided at the connection between the upper water jacket 10 and the lower water jacket 20 . The third water squeezing portion 61 is adjacent to the first water inlet flow path 30 , and is recessed toward the side close to the second water inlet flow path 50 .

[0043] Among them, the third water squeezing portion 61 is provided at the connection between the upper water jacket 10 and the lower water jacket 20 in the up-down direction, and the third water squeezing portion 61 is located on the side close to the first water inlet flow path 30, and the third water squeezing portion 61 is recessed toward the side close to the second water inlet flow path 50, so that the blocking effect of the cooling medium (the cooling medium entering from the first water inlet flow path 30) in the lower water jacket 20 can be further enhanced, thereby reducing the flow rate of the cooling medium flowing into the lower water jacket 20, and at the same time, the flow rate of the cooling medium squeezed into the upper water jacket 10 is relatively increased, and the continuous flow time of the cooling medium in the upper water jacket 10 can be increased, thereby increasing the cooling medium flow rate in the upper water jacket 10, and enhancing the heat dissipation and cooling effect of the upper water jacket 10 on the cylinder head.

[0044] Furthermore, combined with Figure 1-Figure 3 As shown, the lower water jacket 20 is provided with a first guide portion 21, which is located at one end of the lower water jacket 20 adjacent to the first water inlet flow path 30, and the first guide portion 21 extends obliquely toward the center of the lower water jacket 20; the lower water jacket 20 is provided with a second guide portion 22, which is located at one end of the lower water jacket 20 adjacent to the second water inlet flow path 50, and the second guide portion 22 extends obliquely toward the center of the lower water jacket 20.

[0045] Among them, the first guide part 21 located in the lower water jacket 20 extends obliquely toward the center of the lower water jacket 20, so that the first guide part 21 can guide the cooling medium flowing to this place in the lower water jacket 20 according to its contour structure to the area close to the connection between the lower water jacket 20 and the upper water jacket 10 (the temperature of the structure adjacent to this area is higher), thereby promoting more cooling medium to be squeezed into the upper water jacket 10 at the first water squeezing part 40 to a certain extent, and can also increase the cooling effect on the structure with higher heat, thereby increasing the cooling medium flow in the upper water jacket 10.

[0046] In addition, the second guide portion 22 located in the lower water jacket 20 extends obliquely toward the center of the lower water jacket 20, so that the first guide portion 21 can guide the cooling medium flowing to that location in the lower water jacket 20 according to its contour structure to the area close to the connection between the lower water jacket 20 and the upper water jacket 10 (such as the bridge of the nose area, where the heat load is higher), and under the action of the second guide portion 22 and the second water squeezing portion 60, the flow pressure of the cooling medium flowing in the lower water jacket 20 to the area where the lower water jacket 20 and the upper water jacket 10 are connected can be increased, thereby increasing the flow speed of the cooling medium at that location, thereby improving the cooling efficiency of the lower water jacket 20.

[0047] Specifically, combined Figure 1-Figure 3As shown, the lower water jacket 20 is provided with a plurality of lower exhaust valve avoidance holes (not shown in the figure), and the arrangement direction of the plurality of lower exhaust valve avoidance holes is a first direction; the angle between the first guide portion 21 and the first direction is α, and α satisfies the relationship: 40°≤α≤50°; the angle between the second guide portion 22 and the first direction is β, and β satisfies the relationship: 40°≤β≤50°.

[0048] Among them, a plurality of lower exhaust valve avoidance holes for avoiding the exhaust valve are arranged in the lower water jacket 20, so that the lower water jacket 20 can be prevented from interfering with the exhaust valve structure, thereby improving the rationality of the arrangement of the lower water jacket 20. The arrangement direction of the plurality of lower exhaust valve avoidance holes is the first direction, and the angle α between the first guide portion 21 and the first direction is between 40° and 50°, so that the smooth flow and guiding efficiency of the cooling medium in the lower water jacket 20 can be taken into account (compared with α, if the angle α between the first guide portion 21 and the first direction is too small, a strong blocking effect is formed on the cooling medium flowing here, which is not conducive to the cooling medium in the lower water jacket 20 flowing to the middle of the water jacket 100; if the angle α between the first guide portion 21 and the first direction is too large, the flow pressure of the cooling medium flowing here is insufficient and the flow rate of the cooling medium in the lower water jacket 20 flowing to the middle area of ​​the water jacket 100 is reduced), thereby improving the cooling effect of the lower water jacket 20 on the cylinder head. For example, the angle α between the first air guide portion 21 and the first direction may be 40°, 43°, 45°, or 50°, but is not limited thereto.

[0049] In addition, the angle β between the second guide portion 22 and the first direction is between 40° and 50°, so that the smooth flow and guiding efficiency of the cooling medium can be taken into account (compared with β, if the angle α between the second guide portion 22 and the first direction is smaller, a stronger blocking effect is formed on the cooling medium flowing here, which is not conducive to the cooling medium in the lower water jacket 20 flowing to the middle of the water jacket 100; if the angle β between the second guide portion 22 and the first direction is larger, the flow pressure of the cooling medium flowing here is insufficient, thereby reducing the flow rate of the cooling medium in the lower water jacket 20 flowing to the middle area of ​​the water jacket 100), thereby improving the cooling effect of the lower water jacket 20. For example, the angle β between the second guide portion 22 and the first direction can be 40°, 43°, 45° and 50°, but is not limited thereto.

[0050] Furthermore, combined with Figure 1 and Figure 2 As shown, the upper water jacket 10 and the lower water jacket 20 are formed with a communication hole 70 penetrating in the up-down direction, and at least one side of the communication hole 70 is provided with a third guide portion 80 penetrating the connection between the upper water jacket 10 and the lower water jacket 20 .

[0051] The connecting hole 70 can play a role in avoiding the spark plug and the fuel injector. At least one side of the connecting hole 70 is provided with a third guide portion 80 that penetrates the connection between the upper water jacket 10 and the lower water jacket 20, so that the blocking and guiding effects on the cooling medium (when the cooling medium entering from the first water inlet flow path 30 flows to this place) can be further enhanced, thereby achieving the effect of guiding more cooling medium from the connection between the lower water jacket 20 and the upper water jacket 10 to flow to the upper water jacket 10, and at the same time, the flow pressure of the cooling medium at the connection between the lower water jacket 20 and the upper water jacket 10 becomes larger, thereby increasing the cooling medium flow rate in the upper water jacket 10 and the cooling medium flow rate at the connection between the lower water jacket 20 and the upper water jacket 10, and enhancing the comprehensive cooling effect of the water jacket 100.

[0052] According to some optional embodiments of the present invention, combined with Figure 1 and Figure 2 As shown, the lower water jacket 20 is provided with a plurality of lower exhaust valve avoidance holes, and a fourth guide portion (not shown) is provided between adjacent lower exhaust valve avoidance holes; the upper water jacket 10 is provided with a plurality of upper exhaust valve avoidance holes 11, and a fifth guide portion 81 is provided between adjacent upper exhaust valve avoidance holes 11.

[0053] Among them, the temperature at the exhaust valve is usually higher, and the lower water jacket 20 is provided with a plurality of spaced lower exhaust valve avoidance holes, and a fourth guide part is provided between adjacent lower exhaust valve avoidance holes, so that the flow pressure of the cooling medium on both sides of the fourth guide part can be increased, thereby avoiding the risk of cylinder head cracking caused by excessive temperature at the fourth guide part due to too little flow and too low flow velocity around the fourth guide part, thereby improving the cooling effect of the lower water jacket 20 and the service life of the cylinder head.

[0054] In addition, the upper water jacket 10 is provided with a plurality of spaced upper exhaust valve avoidance holes 11, and a fifth guide portion 81 is provided between adjacent upper exhaust valve avoidance holes 11, so that the flow pressure of the cooling medium on both sides of the fifth guide portion 81 can be increased, thereby improving the cooling effect at the upper exhaust valve avoidance holes 11, avoiding the risk of cylinder head cracking caused by excessive temperature at the place where too little flow and too low flow velocity are likely to occur around the fifth guide portion 81, thereby improving the cooling effect of the upper water jacket 10 and the service life of the cylinder head.

[0055] According to some optional embodiments of the present invention, combined with Figure 1 and Figure 2 As shown, the upper water jacket 10 and the lower water jacket 20 are formed with a connecting hole 70 penetrating in the up and down directions, and the lower water jacket 20 is provided with a plurality of lower exhaust valve avoidance holes. The connecting hole 70 is connected to the sixth guide portion 82, and the sixth guide portion 82 is recessed toward the area between two adjacent lower exhaust valve avoidance holes and is triangular in shape.

[0056] Specifically, the upper water jacket 10 and the lower water jacket 20 are formed with a connecting hole 70 penetrating in the up-down direction, and the connecting hole 70 can play the role of avoiding the spark plug and the injector. The lower exhaust valve avoidance hole can play the role of avoiding the exhaust valve for the lower water jacket 20. The connecting hole 70 can guide the cooling medium to the exhaust nose bridge area adjacent to the lower water jacket 20, thereby increasing the cooling and heat dissipation effect of the exhaust nose bridge area.

[0057] According to some other optional embodiments of the present invention, combined with Figure 1 and Figure 2 As shown, one side of the lower water jacket 20 is connected to a water outlet 90 , and the other side of the lower water jacket 20 is connected to a sand cleaning hole 91 . An end of the lower water jacket 20 adjacent to the sand cleaning hole 91 is provided with a through hole 92 penetrating the lower water jacket 20 .

[0058] Specifically, the two sides of the lower water jacket 20 are connected with a water outlet 90 and a sand cleaning hole 91, respectively, and the water outlet 90 and the sand cleaning hole 91 are located away from the water inlet direction of the first water inlet flow path 30 and the second water inlet flow path 50. The water outlet 90 can guide the cooling medium after cooling and heat exchange to the outside of the water jacket 100, and the sand cleaning hole 91 can clean the sand that may be contained in the cooling medium. Among them, a through hole 92 that penetrates the lower water jacket 20 is provided at one end of the lower water jacket 20 adjacent to the sand cleaning hole 91, so that the flow pressure in the lower water jacket 20 flowing to the middle area (where the cylinder head is adjacent to the structure with higher temperature) can be increased, thereby increasing the cooling and heat dissipation effect of the middle area, thereby improving the comprehensive practicality of the water jacket 100.

[0059] Optionally, a flow path of the cooling medium is introduced below: the first water inlet (that is, the water inlet of the first water inlet flow path 30) is directly connected to the cooling medium container, and the cooling medium entering from the first water inlet hole flows to the upper water jacket 10 through the first water inlet flow path 30, and flows to the water outlet hole 90 by bypassing the first guide part 21. The cooling medium entering from the second water inlet (that is, the water inlet of the second water inlet flow path 50) flows to the lower water jacket 20 and the upper water jacket 10 through the second water inlet flow path 50, and a part of the cooling medium flows to the through hole 92 of the upper water jacket 10, and converges with the cooling medium flowing to this place from the lower water jacket 20 to flow to the water outlet hole 90; another part of the cooling medium flows to the through hole 92 of the lower water jacket 20 after passing through the second guide part 22, and finally flows into the water outlet hole 90; another part of the cooling medium flows to the water outlet hole 90 by bypassing the outer side of the first guide part 21.

[0060] The engine according to the embodiment of the second aspect of the utility model includes the cylinder head of the above embodiment. The engine with the cylinder head can improve the cooling effect of the water jacket 100 and extend the service life of the cylinder head, thereby ensuring that the engine can work normally and stably, thereby improving the practicality and reliability of the engine.

[0061] The vehicle according to the third aspect of the present invention includes the engine of the above embodiment. The vehicle having the engine can improve the cooling effect of the water jacket 100 and extend the service life of the cylinder head, thereby ensuring that the engine can work normally and stably, thereby improving the durability of the vehicle.

[0062] In the description of the present invention, 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", "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 invention and simplifying the description, and do not indicate or imply that the referred device or element 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 invention.

[0063] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0065] Although the embodiments of the present invention 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 spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cylinder head, characterized in that: include: Upper water jacket; A lower water jacket, the lower water jacket is located below the upper water jacket and is in communication with the upper water jacket; a first water inlet flow path, the first water inlet flow path being communicated with the upper water jacket and the lower water jacket respectively; A first concave water squeezing portion is provided at the connection between the lower water jacket and the first water inlet flow path or at one side of the lower water jacket adjacent to the first water inlet flow path, so that the flow rate of the first water inlet flow path flowing into the upper water jacket is greater than the flow rate flowing into the lower water jacket.

2. The cylinder head according to claim 1, characterized in that: Also includes: a second water inlet flow path, the second water inlet flow path being communicated with the upper water jacket and the lower water jacket respectively, and the second water inlet flow path being spaced apart from the first water inlet flow path; A second concave water squeezing portion is provided at the connection between the upper water jacket and the second water inlet flow path or at one side of the upper water jacket adjacent to the second water inlet flow path, so that the flow rate of the second water inlet flow path flowing into the lower water jacket is greater than the flow rate flowing into the upper water jacket.

3. The cylinder head according to claim 2, characterized in that: A third water squeezing portion is disposed at the connection between the upper water jacket and the lower water jacket. The third water squeezing portion is adjacent to the first water inlet flow path and is recessed toward a side close to the second water inlet flow path.

4. The cylinder head according to claim 2, characterized in that: The lower water jacket is provided with a first guide portion, the first guide portion is located at one end of the lower water jacket adjacent to the first water inlet flow path, and the first guide portion extends obliquely toward the center of the lower water jacket; and / or The lower water jacket is provided with a second guide portion, which is located at one end of the lower water jacket adjacent to the second water inlet flow path, and the second guide portion extends obliquely toward the center of the lower water jacket.

5. The cylinder head according to claim 4, characterized in that: The lower water jacket is provided with a plurality of lower exhaust valve avoidance holes, and the arrangement direction of the plurality of lower exhaust valve avoidance holes is a first direction; The angle between the first guide portion and the first direction is α, and α satisfies the relationship: 40°≤α≤50°; and / or The included angle between the second guide portion and the first direction is β, and β satisfies the relationship: 40°≤β≤50°.

6. The cylinder head according to claim 4, characterized in that: The upper water jacket and the lower water jacket are formed with a communication hole penetrating in the up-down direction, and at least one side of the communication hole is provided with a third guide portion penetrating the connection between the upper water jacket and the lower water jacket.

7. The cylinder head according to claim 1, characterized in that The lower water jacket is provided with a plurality of lower exhaust valve avoidance holes, and a fourth air guide portion is provided between adjacent lower exhaust valve avoidance holes; and / or The upper water jacket is provided with a plurality of upper exhaust valve avoidance holes, and a fifth air guide portion is provided between adjacent upper exhaust valve avoidance holes.

8. The cylinder head according to claim 1, characterized in that The upper water jacket and the lower water jacket are formed with a connecting hole penetrating in the up-down direction, the lower water jacket is provided with a plurality of lower exhaust valve avoidance holes, the connecting holes are connected with a sixth air guide portion, the sixth air guide portion is recessed toward the area between two adjacent lower exhaust valve avoidance holes and is triangular in shape; and / or One side of the lower water jacket is connected with a water outlet hole and the other side is connected with a sand cleaning hole. One end of the lower water jacket adjacent to the sand cleaning hole is provided with a through hole penetrating the lower water jacket.

9. An engine, characterized in that: include: The cylinder head according to any one of claims 1 to 8.

10. A vehicle, characterized in that: include: The engine of claim 9.

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