Cylinder cover of engine, engine and vehicle

Abstract

The utility model relates to a cylinder cover of an engine, the engine and a vehicle. A cylinder head of an engine includes a first water jacket through which a cooling liquid flows to cool the cylinder head, and the first water jacket includes an exhaust side water jacket, an intake side water jacket, and a combustion chamber water jacket for cooling an upper portion of a combustion chamber; the air exhaust side water jacket is provided with a first flow channel extending in the front-back direction of the air cylinder cover, the air inlet side water jacket is provided with a second flow channel extending in the front-back direction of the air cylinder cover, the combustion chamber water jacket is provided with a third flow channel, and the first flow channel is communicated with the second flow channel through the third flow channel. The cylinder cover provided by the utility model is good in cooling effect.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, and more specifically, to a cylinder head of an engine, an engine and a vehicle. Background Art

[0002] Components with high heat loads are usually integrated on the cylinder head, so that the heat load is particularly high on the exhaust side of the cylinder head. In the prior art, the coolant in the water jacket of the cylinder head usually flows from one side to the other side, and its cooling range is limited and the cooling effect is uneven, which affects the overall cooling effect of the cylinder head.

[0003] In view of this, it is necessary to design a cylinder head with better cooling effect. Utility Model Content

[0004] One object of the utility model is to provide a cylinder head of an engine, an engine and a vehicle.

[0005] According to one aspect of the utility model, a cylinder head of an engine is provided, which is used to enclose a combustion chamber with a cylinder body, comprising:

[0006] A first water jacket, through which coolant flows to cool the cylinder head, and the first water jacket includes an exhaust side water jacket, an intake side water jacket and a combustion chamber water jacket for cooling the upper part of the combustion chamber;

[0007] The exhaust side water jacket is provided with a first flow channel extending along the front-to-back direction of the cylinder head, the intake side water jacket is provided with a second flow channel extending along the front-to-back direction of the cylinder head, and the combustion chamber water jacket is provided with a third flow channel, and the first flow channel is connected to the second flow channel through the third flow channel.

[0008] Optionally, a plurality of the combustion chamber water jackets are provided, and the plurality of the combustion chamber water jackets are located above each combustion chamber in a one-to-one correspondence;

[0009] A plurality of the third flow passages are provided corresponding to the combustion chamber water jacket, and the first flow passage is communicated with the second flow passage through the plurality of the third flow passages.

[0010] Optionally, the third flow channel includes two cooling sections arranged side by side and a connecting section that merges the two cooling sections;

[0011] The cooling liquid in the first flow channel can be divided into each of the cooling sections and converge into the second flow channel through the corresponding connecting sections.

[0012] Optionally, a plurality of flow-blocking structures are provided on the exhaust-side water jacket, and the flow-blocking structures can make the flow rate of the coolant flowing from the first flow channel into each of the third flow channels the same.

[0013] Optionally, the engine further includes an integrated exhaust manifold, and the exhaust side water jacket extends at least to a position below the integrated exhaust manifold.

[0014] Optionally, the exhaust side water jacket is further provided with a first water inlet, and the intake side water jacket is further provided with a first water outlet, and the first water inlet and the first water outlet are both located at the rear end of the cylinder head.

[0015] Optionally, the cylinder head further comprises a second water jacket, the first water jacket is for coolant to flow to cool the lower area of ​​the cylinder head, and the second water jacket is for coolant to flow to cool the upper area of ​​the cylinder head;

[0016] The second water jacket is provided with a second water inlet and a second water outlet, the second water inlet is close to the first water inlet, and the second water outlet is close to the first water outlet.

[0017] Optionally, an exhaust passage is further provided on the cylinder head, and the exhaust passage is located between the first water jacket and the second water jacket, and the shapes of the second water jacket and the first water jacket at the positions of the exhaust passage are consistent with the shape of the exhaust passage.

[0018] According to a second aspect of the utility model, an engine is provided, comprising a cylinder block and the cylinder head described in the first aspect.

[0019] According to a third aspect of the utility model, a vehicle is provided, comprising the engine described in the second aspect.

[0020] A technical effect of the utility model is that the utility model designs the first water jacket of the cylinder head to have an exhaust side water jacket, an intake side water jacket and a combustion chamber water jacket, and respectively arranges a first flow channel and a second flow channel arranged along the front-to-rear direction of the cylinder head in the exhaust side water jacket, the intake side water jacket and the combustion chamber water jacket, so that the coolant can flow longitudinally in the cylinder head along the front-to-rear direction, and connects the first flow channel with the second flow channel through the third flow channel, so that the coolant can flow transversely in the cylinder head from the exhaust side to the intake side. By combining the longitudinal flow and the transverse flow, the cooling dead angle is reduced and the cooling effect of the entire cylinder head is improved.

[0021] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model.

[0023] Figure 1 The utility model is a structural schematic diagram of a cylinder cover.

[0024] Figure 2 It is a top view of a cylinder head provided by the utility model.

[0025] Figure 3 It is a cross-sectional view of a cylinder head provided by the utility model.

[0026] Figure 4 It is a structural schematic diagram of a first water jacket provided by the utility model.

[0027] Figure 5 yes Figure 4 A top view of the first water jacket in FIG.

[0028] Description of reference numerals:

[0029] 2. Second water jacket; 21. Second water inlet; 22. Second water outlet; 3. First water jacket; 31. First water inlet; 32. First water outlet; 33. Exhaust side water jacket; 34. Intake side water jacket; 35. Combustion chamber water jacket; 351. Cooling section; 352. Connecting section; 36. Flow blocking structure; 4. Exhaust duct; 7. Integrated exhaust manifold. DETAILED DESCRIPTION

[0030] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0032] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0033] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0034] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0035] like Figures 1 to 5As shown, according to one aspect of the utility model, a cylinder head of an engine is provided, which is used to enclose a combustion chamber with a cylinder body, and includes: a first water jacket 3, for coolant to flow to cool the cylinder head, and the first water jacket 3 includes an exhaust side water jacket 33, an intake side water jacket 34 and a combustion chamber water jacket 35 for cooling the upper part of the combustion chamber; the exhaust side water jacket 33 is provided with a first flow channel extending along the front-to-back direction of the cylinder head, the intake side water jacket 34 is provided with a second flow channel extending along the front-to-back direction of the cylinder head, and the combustion chamber water jacket 35 is provided with a third flow channel, and the first flow channel is connected to the second flow channel through the third flow channel.

[0036] Specifically, in the present embodiment, the first water jacket 3 of the cylinder head is designed to have an exhaust side water jacket 33, an intake side water jacket 34 and a combustion chamber water jacket 35, and by respectively arranging a first flow channel and a second flow channel along the front-to-rear direction of the cylinder head in the exhaust side water jacket 33, the intake side water jacket 34 and the combustion chamber water jacket 35, the coolant can flow longitudinally in the cylinder head along the front-to-rear direction, and the first flow channel is connected with the second flow channel through the third flow channel, so that the coolant can flow transversely in the cylinder head from the exhaust side to the intake side. This combination of longitudinal flow and transverse flow is beneficial to the cooling of the exhaust side and the combustion chamber, reduces the temperature difference between the intake and exhaust sides and the temperature near the combustion chamber, and improves the cooling effect of the entire cylinder head.

[0037] In the above embodiment, the rear end of the cylinder head is consistent with the rear end, front end, intake side and exhaust side of the engine. The rear end of the engine usually refers to the rear end of the crankshaft, that is, the end of the crankshaft connected to the flywheel, and the front end of the engine is the end opposite to the rear end, the exhaust side of the engine refers to the side of the engine located at the exhaust port, and the intake side of the engine refers to the side of the engine located at the intake port, that is, the side opposite to the exhaust side.

[0038] Alternatively, if Figure 2 and Figure 5 As shown, the combustion chamber water jacket 35 is provided in plurality, and the plurality of the combustion chamber water jackets 35 are located one-to-one above each combustion chamber; the third flow passage is provided in plurality corresponding to the combustion chamber water jacket 35, and the first flow passage is connected to the second flow passage through the plurality of the third flow passages.

[0039] Specifically, in this embodiment, a combustion chamber water jacket 35 is correspondingly designed above each combustion chamber, and the coolant in the first flow channel can be diverted to the third flow channel in each combustion chamber water jacket 35 to uniformly cool each cylinder body. The coolant in the first flow channel enters the exhaust side water jacket 33 through the first water inlet 31, first cools the exhaust side with a higher temperature, and then cools each combustion chamber through each third flow channel, thereby improving the cooling effect of the first water jacket 3 on the combustion chamber temperature.

[0040] Alternatively, if Figure 5 As shown, the shapes of the plurality of combustion chamber water jackets 35 are respectively consistent with the shapes of the cylinder ports of the cylinder block.

[0041] Specifically, in this embodiment, the shape of each combustion chamber water jacket 35 is designed to be consistent with the shape of each cylinder port of the cylinder block, so that it can fully cool the upper part of each combustion chamber, thereby improving the cooling effect on the combustion chamber temperature.

[0042] Alternatively, if Figure 5 As shown, the third flow channel includes two cooling segments 351 arranged side by side and a connecting segment 352 that converges the two cooling segments 351; the coolant in the first flow channel can be diverted to each of the cooling segments 351 and converge into the second flow channel through the corresponding connecting segment 352.

[0043] Specifically, in this embodiment, two cooling sections 351 are arranged side by side along the front-rear direction of the cylinder head, that is, the two cooling sections 351 are respectively located on both sides above a cylinder port, so as to achieve sufficient cooling above the combustion chamber. Among them, the connecting section 352 is used to connect the two cooling sections 351, so that the coolant in the combustion chamber water jacket 35 can flow into the intake side water jacket 34, and then the coolant can flow out, so that the entire first water jacket 3 can form a cross-flow cooling mode.

[0044] In practical applications, by designing the width of different connecting sections 352, it is possible to limit the flow rate in each cooling section 351, achieve approximately the same flow rate in each cooling section 351, and improve the uniformity of cooling of each combustion chamber.

[0045] Alternatively, if Figure 5 As shown, a plurality of flow-blocking structures 36 are provided on the exhaust-side water jacket 33 , and the flow-blocking structures 36 can make the flow rate of the coolant flowing from the first flow channel into each of the third flow channels the same.

[0046] Specifically, in this embodiment, after the coolant in the first flow channel enters from the rear end of the cylinder head, it needs to be evenly diverted to each third flow channel. By setting a flow-blocking structure 36 in the first flow channel, the flow direction of the coolant in the first flow channel can be blocked. By rationally setting the position and structural shape of the flow-blocking structure 36, the purpose of making the flow in each third flow channel the same can be achieved, thereby enabling the coolant in each third flow channel to achieve uniform diversion. Among them, the flow-blocking structure 36 can be designed as a plurality of hollow structures located on the exhaust side water jacket 33, which not only achieves the purpose of uniform diversion, but also simplifies and lightens the structure of the cylinder head. In addition, in actual design, the specific shape and position of the flow-blocking structure 36 can be determined by simulation, and the utility model does not limit this.

[0047] Alternatively, if Figure 5 As shown, the engine further includes an integrated exhaust manifold 7 , and the exhaust side water jacket 33 extends at least to the bottom of the integrated exhaust manifold 7 .

[0048] Specifically, in practical applications, the operating temperature of the integrated exhaust manifold (IEM) is usually relatively high, and the exhaust side water jacket 33 is extended to the bottom of the integrated exhaust manifold 7 to improve the cooling effect on the integrated exhaust manifold 7 .

[0049] Optionally, the exhaust side water jacket 33 is further provided with a first water inlet 31, and the intake side water jacket 34 is further provided with a first water outlet 32, and the first water inlet 31 and the first water outlet 32 ​​are both located at the rear end of the cylinder head.

[0050] Specifically, the first water inlet 31 and the first water outlet 32 ​​are both arranged at the rear end of the cylinder head, which can improve the integration of the cylinder head structure on the one hand, and is conducive to the formation of a longitudinal flow form of the internal coolant along the front-to-back direction of the cylinder head on the other hand, thereby reducing cooling dead angles and improving the cooling uniformity and cooling effect of the cylinder head.

[0051] Alternatively, if Figures 1 to 3 As shown, the cylinder head also includes a second water jacket 2, the first water jacket 3 is for coolant to flow to cool the lower area of ​​the cylinder head, and the second water jacket 2 is for coolant to flow to cool the upper area of ​​the cylinder head; the second water jacket 2 is provided with a second water inlet 21 and a second water outlet 22, the second water inlet 21 is close to the first water inlet 31, and the second water outlet 22 is close to the first water outlet 32.

[0052] Specifically, in this embodiment, the cylinder head includes a first water jacket 3 and a second water jacket 2, which are used to cool the lower area and the upper area of ​​the cylinder head respectively, so as to form an overall cooling effect on the entire cylinder head. Among them, the second water inlet 21 and the second water outlet 22 of the second water jacket 2 are designed to be close to the first water inlet 31 and the first water outlet 32 ​​respectively, which improves the integration of the cylinder head and facilitates the water inlet and outlet design of the entire water jacket system.

[0053] Alternatively, if Figure 3 As shown, the cylinder head is also provided with an exhaust passage 4, which is located between the first water jacket 3 and the second water jacket 2, and the shapes of the second water jacket 2 and the first water jacket 3 at the position of the exhaust passage 4 are consistent with the shape of the exhaust passage 4.

[0054] Specifically, in this embodiment, the exhaust duct 4 is used to discharge the exhaust gas generated by the internal combustion of the engine, and its heat load is usually high. The upper and lower sides of the exhaust duct 4 are cooled by the first water jacket 3 and the second water jacket 2 respectively, thereby improving the cooling effect. Among them, the shape of the first water jacket 3 and the second water jacket 2 at the exhaust duct 4 is designed to be consistent with the shape of the exhaust duct 4, that is, the shapes of the first water jacket 3 and the second water jacket 2 at the exhaust duct 4 are the same or similar, thereby increasing the contact area between the first water jacket 3 and the second water jacket 2 and the exhaust duct 4, thereby improving the cooling effect on the exhaust duct.

[0055] According to a second aspect of the utility model, an engine is provided, comprising a cylinder block and the cylinder head described in the first aspect.

[0056] Specifically, in the present embodiment, the cylinder head of the engine adopts the cylinder head provided by the first aspect of the present invention, which has good cooling effect and high integration, reduces the temperature difference between the exhaust side of the entire engine and the temperature of the combustion chamber, and its first water inlet 31 and the first water outlet 32 ​​are both arranged at the rear end of the cylinder head, which is easy to integrate with the total water inlet and total water outlet of the engine, thereby improving the working performance and overall integration of the engine.

[0057] According to a third aspect of the utility model, a vehicle is provided, comprising the engine described in the second aspect.

[0058] Specifically, in this embodiment, the vehicle adopts the engine provided by the second aspect of the utility model, which has high working performance and integration, thereby improving the overall performance and safety of the vehicle.

[0059] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0060] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A cylinder head of an engine, used to enclose a combustion chamber with a cylinder body, characterized in that: include: A first water jacket (3) for cooling liquid to flow to cool the cylinder head, wherein the first water jacket (3) comprises an exhaust side water jacket (33), an intake side water jacket (34) and a combustion chamber water jacket (35) for cooling the upper part of the combustion chamber; The exhaust side water jacket (33) is provided with a first flow channel extending along the front-rear direction of the cylinder head, the intake side water jacket (34) is provided with a second flow channel extending along the front-rear direction of the cylinder head, and the combustion chamber water jacket (35) is provided with a third flow channel, and the first flow channel is connected to the second flow channel through the third flow channel.

2. The cylinder head according to claim 1, characterized in that: A plurality of the combustion chamber water jackets (35) are provided, and the plurality of the combustion chamber water jackets (35) are located above each combustion chamber in a one-to-one correspondence; A plurality of the third flow passages are provided corresponding to the combustion chamber water jacket (35), and the first flow passage is connected to the second flow passage through the plurality of the third flow passages.

3. The cylinder head according to claim 2, characterized in that: The third flow channel comprises two cooling sections (351) arranged side by side and a connecting section (352) that merges the two cooling sections (351); The cooling liquid in the first flow channel can be divided into each of the cooling sections (351) and converge into the second flow channel through the corresponding connecting section (352).

4. The cylinder head according to claim 2, characterized in that: A plurality of flow-blocking structures (36) are arranged on the exhaust-side water jacket (33), and the flow-blocking structures (36) can make the flow rate of the coolant flowing from the first flow channel into each of the third flow channels the same.

5. The cylinder head according to claim 1, characterized in that: The engine comprises an integrated exhaust manifold (7), and the exhaust side water jacket (33) can extend at least to a position below the integrated exhaust manifold (7).

6. The cylinder head according to claim 1, characterized in that: The exhaust side water jacket (33) is also provided with a first water inlet (31), and the intake side water jacket (34) is also provided with a first water outlet (32), and the first water inlet (31) and the first water outlet (32) are both located at the rear end of the cylinder head.

7. The cylinder head according to claim 6, characterized in that The cylinder head further comprises a second water jacket (2), the first water jacket (3) is for cooling liquid to flow to cool the lower area of ​​the cylinder head, and the second water jacket (2) is for cooling liquid to flow to cool the upper area of ​​the cylinder head; The second water jacket (2) is provided with a second water inlet (21) and a second water outlet (22), wherein the second water inlet (21) is close to the first water inlet (31), and the second water outlet (22) is close to the first water outlet (32).

8. The cylinder head according to claim 7, characterized in that The cylinder head is also provided with an exhaust passage (4), the exhaust passage (4) being located between the first water jacket (3) and the second water jacket (2), and the shapes of the second water jacket (2) and the first water jacket (3) at the positions of the exhaust passage are respectively consistent with the shape of the exhaust passage.

9. An engine, characterized in that: It comprises a cylinder block and a cylinder head as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising the engine as claimed in claim 9.

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