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, the first water jacket being located on an exhaust side of the cylinder head; the first water jacket comprises a first main body and a second main body, the first main body and the second main body are arranged side by side and extend in the front-back direction of the air cylinder cover, and the front-back direction is the direction from the front end of an engine to the rear end of the engine. The cooling effect of the exhaust side of the cylinder cover of the engine is good.

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 thermal load are integrated on the cylinder head, so that the thermal load is particularly high on the exhaust side of the cylinder head. In the prior art, the water jacket of the cylinder head has a certain cooling effect on the cylinder head, but the cooling effect on the exhaust side is limited.

[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 new technical solution for a cylinder head of an engine, an engine and a vehicle.

[0005] According to one aspect of the utility model, there is provided a cylinder head of an engine, comprising:

[0006] a first water jacket for coolant to flow to cool an upper area of ​​the cylinder head, the first water jacket being located on an exhaust side of the cylinder head;

[0007] The first water jacket includes a first main body and a second main body, the first main body and the second main body are arranged side by side and extend respectively along the front-to-back direction of the cylinder head, and the front-to-back direction is the direction from the front end of the engine to the rear end of the engine.

[0008] Optionally, the first body and the second body are connected to each other at the front end of the cylinder head;

[0009] The first body is provided with a first water inlet at the rear end of the cylinder head, and the second body is provided with a first water outlet at the rear end of the cylinder head.

[0010] Optionally, the engine includes a plurality of exhaust valve conduits spaced apart along the front-rear direction, and the first body and the second body are separated from each other at least at positions where the plurality of exhaust valve conduits are located.

[0011] Optionally, the engine further comprises an integrated exhaust manifold, spark plugs and fuel injectors;

[0012] The first body can extend at least to an upper portion of the integrated exhaust manifold, and the second body can extend at least to a position around the spark plug and a position around the fuel injector.

[0013] Optionally, the engine further comprises a plurality of intake valve guides arranged at intervals along the front-to-rear direction;

[0014] The second body is located between the plurality of exhaust valve conduits and the plurality of intake valve conduits, and contours of two sides of the second body are respectively consistent with contours of the plurality of exhaust valve conduits and the plurality of intake valve conduits.

[0015] Optionally, a plurality of flow channels are arranged at intervals in the first main body, one end of each of the plurality of flow channels is connected to the first water inlet, and the other end of each of the plurality of flow channels converges and is connected to the second main body.

[0016] Optionally, the plurality of flow channels have the same width and are evenly arranged along the width direction of the first body.

[0017] Optionally, the first water jacket further includes a water outlet pipe, the second body is close to the air intake side of the cylinder head, the water outlet pipe is connected to the second body at the rear end of the cylinder head, and the first water outlet is formed on the air intake side.

[0018] Optionally, a second water jacket is further included, wherein the first water jacket is provided with coolant to flow to cool the upper area of ​​the cylinder head, and the second water jacket is provided with coolant to flow to cool the lower area of ​​the cylinder head;

[0019] 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.

[0020] 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 first water jacket and the second water jacket at the positions of the exhaust passage are consistent with the shape of the exhaust passage.

[0021] 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.

[0022] According to a second aspect of the utility model, a vehicle is provided, comprising the engine described in the second aspect.

[0023] One technical effect of the utility model is that the utility model arranges the first water jacket of the cylinder head on the exhaust side of the cylinder head, and designs the first body and the second body side by side as a water jacket with double flow channels, so that when the coolant flow in the water jacket is constant, the coolant can fully cool the exhaust side of the cylinder head from the front end to the rear end of the cylinder head, thereby greatly improving the cooling effect of the cylinder head.

[0024] 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

[0025] 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.

[0026] Figure 1 The utility model is a structural schematic diagram of a cylinder cover.

[0027] Figure 2 It is a top view of a cylinder head provided by the utility model.

[0028] Figure 3 It is a cross-sectional view of a cylinder head provided by the utility model.

[0029] Figure 4 It is a structural schematic diagram of a first water jacket provided by the utility model.

[0030] Figure 5 yes Figure 4 A top view of the first water jacket is provided in FIG.

[0031] Description of reference numerals:

[0032] 2. First water jacket; 21. First water inlet; 22. First water outlet; 25. First main body; 26. Second main body; 27. Exhaust valve guide; 28. Flow channel; 29. ​​Water outlet pipe; 3. Second water jacket; 31. Second water inlet; 32. Second water outlet; 4. Exhaust duct; 5. Spark plug; 6. Fuel injector; 7. Integrated exhaust manifold; 8. Intake valve guide. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] like Figures 1 to 5 As shown, a cylinder head of an engine is provided, comprising: a first water jacket 2 for coolant to flow to cool the cylinder head, the first water jacket 2 being located on the exhaust side of the cylinder head; the first water jacket 2 comprising a first main body 25 and a second main body 26, the first main body 25 and the second main body 26 being arranged side by side and extending respectively along the front-to-rear direction of the cylinder head, the front-to-rear direction being the direction from the front end of the engine to the rear end of the engine.

[0039] Specifically, in this embodiment, the first water jacket 2 is mainly used to cool the upper area of ​​the cylinder head, which is arranged on the exhaust side of the cylinder head, and a double-flow channel 28 water jacket is formed by arranging the first main body 25 and the second main body 26 extending in the front-rear direction of the cylinder head side by side, so that when the coolant flow rate in the water jacket is constant, the coolant can fully cool the exhaust side of the cylinder head from the front end to the rear end of the cylinder head, thereby improving the cooling effect on the exhaust side. The first main body 25 and the second main body 26 are arranged side by side, which means that they are arranged side by side in the direction from the exhaust side to the intake side of the engine to ensure the cooling range of the cylinder head in the width direction of the exhaust side.

[0040] Among them, 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.

[0041] In addition, the first water jacket 2 is located on the exhaust side of the cylinder head, which is only relative to the intake side, and its specific position is not strictly limited. Figure 5 As shown, the side of the intake valve guide 8 close to the exhaust valve guide 27 can be referred to as the exhaust side.

[0042] In practical applications, the first body 25 and the second body 26 can be connected to each other or separated from each other. When connected, they can be connected at the front end or rear end of the cylinder head, or in the area between the front end and the rear end. The specific design can be made according to the specific structure of the engine cylinder head and the layout of each component. In addition, the first water jacket 2 on the exhaust side of the cylinder head at least extends to the top of the cylinder head, so that the coolant in the water jacket can cool the upper area of ​​the cylinder head, so that the cooling of the exhaust side of the cylinder head is more sufficient, and the cooling effect on the exhaust side is further improved.

[0043] Alternatively, if Figure 5 As shown, the first body 25 and the second body 26 are connected to each other at the front end of the cylinder head; the first body 25 is provided with a first water inlet 21 at the rear end of the cylinder head, and the second body 26 is provided with a first water outlet 22 at the rear end of the cylinder head.

[0044] Specifically, in this embodiment, by isolating the first body 25 and the second body 26 from each other and connecting them at the front end of the cylinder head, the coolant can first flow into the first body 25 from the first water inlet 21 on the first body at the rear end of the cylinder head to cool the exhaust side area covered by the first body 25, then flow into the second body 26 through the front end, and then flow out from the first water outlet 22 to cool the exhaust side area covered by the second body 26, so as to achieve the effect of the two-way flow channel 28 circulating to cool the exhaust side of the cylinder head, and further improve the cooling effect. Among them, the front end and the rear end of the cylinder head are consistent with the front end and the rear end of the engine.

[0045] In addition, in the above embodiment, the first water jacket 2 has an independent first water inlet 21 and a first water outlet 22, which can independently control the coolant flow in the water jacket from other water jackets, thereby realizing refined control of the engine thermal management. Furthermore, the first water inlet 21 and the first water outlet 22 are arranged at the same end (rear end) of the cylinder head, which can realize the circulation cooling of the coolant in the first water jacket 2 on the one hand, thereby improving the cooling effect, and on the other hand, it is also convenient for the integrated design of various components of the engine cylinder head.

[0046] In one embodiment, the position of the mutual partition between the first body 25 and the second body 26 can be designed to match the arrangement of the components on the cylinder head. For example, the area with a higher temperature on the cylinder head can be partitioned to achieve a better cooling effect on the high temperature area.

[0047] Alternatively, if Figure 5 As shown, the engine includes a plurality of exhaust valve conduits 27 spaced apart along the front-rear direction, and the first body 25 and the second body 26 are separated from each other at least at positions where the plurality of exhaust valve conduits 27 are located.

[0048] Specifically, in practical applications, the exhaust valve guide 27 is an important part of the engine. As a guide device for the engine's valve, it mainly guides the movement of the valve, ensures that the valve can make reciprocating linear motion, and ensures that the valve and the valve seat have precise concentricity, so that the valve and the valve seat ring can fit correctly. In addition, the exhaust valve guide 27 also plays a role in heat conduction, transferring the heat on the valve stem to the cylinder head, helping to reduce the temperature of the valve stem. Its lower part usually extends to the exhaust duct 4 of the engine, and the operating temperature can usually reach about 200°C.

[0049] In this embodiment, the partition position of the first body 25 and the second body 26 is set at least at the position of the exhaust valve duct 27, so that the coolant in the first body 25 and the second body 26 can pass through multiple exhaust valve ducts 27, and each exhaust valve duct 27 is evenly cooled. In addition, the partition at the exhaust valve duct 27 can prevent its cooling from being affected by the cooling at the exhaust duct 4, thereby avoiding turbulence.

[0050] Alternatively, if Figure 5 As shown, the engine also includes an integrated exhaust manifold 7, a spark plug 5 and an injector 6; the first body 25 can extend at least to the top of the integrated exhaust manifold 7, and the second body 26 can extend at least to the periphery of the spark plug 5 and the periphery of the injector 6.

[0051] Specifically, in actual applications, the operating temperature of the integrated exhaust manifold 7 (IEM) is usually relatively high. It is located on the outside of the multiple exhaust valve ducts 27 (i.e., on the side away from the intake valve ducts 8), and the first body 25 at least extends to cover the top of the integrated exhaust manifold 7, that is, the projection of the first body 25 on the integrated exhaust manifold 7 can completely cover the integrated exhaust manifold 7, thereby improving the cooling effect on the integrated exhaust manifold 7.

[0052] In addition, in actual applications, the spark plug 5 and the injector 6 are usually located above the cylinder body. The spark plug 5 is used to ignite the combustible mixture in the cylinder, and the injector 6 is used to atomize the fuel and spray it to produce high-pressure oil mist for combustion in the cylinder. Both of them will also cause high temperatures during operation. The second body 26 at least extends to the position around the spark plug 5 and the injector 6, that is, at least part of the structure of the second body can surround the spark plug 5 and the injector 6, so that it has a better cooling effect on the spark plug 5 and the injector 6.

[0053] Through the position arrangement of the first body 25 and the second body 26, the first water jacket 2 has a good cooling effect on the components with higher working temperatures on the cylinder head, thereby improving the cooling effect on the exhaust side of the cylinder head as a whole.

[0054] Alternatively, if Figure 2 and Figure 5 As shown, the engine also includes a plurality of intake valve ducts 8 spaced apart along the front-to-rear direction; the second body 26 is located between the plurality of exhaust valve ducts 27 and the plurality of intake valve ducts 8, and the contours on both sides of the exhaust valve ducts 27, the first body 25, the first body 25, the second body 26, and the second body 26 are respectively consistent with the contours of the plurality of exhaust valve ducts 27 and the plurality of intake valve ducts 8.

[0055] Specifically, in this embodiment, the second body 26 is disposed between the exhaust valve conduit 27 and the intake valve conduit 8, and the contours on both sides of the second body 26 are respectively consistent with the contours of the multiple exhaust valve conduits 27 and the multiple intake valve conduits 8, which not only improves the cooling effect of the exhaust valve conduits 27, but also ensures that the flow rate of the coolant around each cylinder block of the engine is consistent. Among them, the contours on both sides of the second body 26 are consistent with the contours of the multiple exhaust valve conduits 27 and the multiple intake valve conduits 8, which means that the shape of the outer contour of the second body 26 can be designed according to the shape of the conduits on both sides, such as Figure 2 and Figure 5 shown.

[0056] Alternatively, if Figure 5 As shown, a plurality of flow channels 28 are arranged in the first body 25 at intervals, one end of each of the plurality of flow channels 28 is connected to the first water inlet 21, and the other end of each of the plurality of flow channels 28 is connected to the second body 26. The plurality of flow channels 28 have the same width and are evenly arranged along the width direction of the first body 25.

[0057] Specifically, in this embodiment, a plurality of flow channels 28 are provided in the first body 25 so that the cylinder head covered by the first body 25 can be evenly cooled. The uniform width and uniform arrangement of the flow channels 28 can ensure the uniform flow of the coolant in each flow channel 28, thereby improving the uniformity of cooling of each part of the first body 25. In one embodiment, five flow channels 28 can be provided in the first body 25, and their width is set to about 14 mm.

[0058] Alternatively, if Figure 2 and Figure 5 As shown, the first water jacket 2 further includes a water outlet pipe 29, and the second body 26 is close to the air intake side of the cylinder head. The water outlet pipe 29 is connected to the second body 26 at the rear end of the cylinder head, and the first water outlet 22 is formed on the air intake side.

[0059] Specifically, in the present embodiment, the first water outlet 22 of the first water jacket 2 is led out to the air intake side of the engine through the water outlet pipe 29, which neither affects the layout of other components on the cylinder head nor facilitates the integrated design of the positions of the first water outlet 22 and the water outlets of other water jacket structures of the engine.

[0060] Alternatively, if Figures 1 to 4 As shown, the cylinder head also includes a second water jacket 3, the first water jacket 2 is for coolant to flow to cool the upper area of ​​the cylinder head, and the second water jacket 3 is for coolant to flow to cool the lower area of ​​the cylinder head; the second water jacket 3 is provided with a second water inlet 31 and a second water outlet 32, the second water inlet 31 is close to the first water inlet 21, and the second water outlet 32 ​​is close to the first water outlet 22.

[0061] Specifically, in this embodiment, the first water jacket 2 and the second water jacket 3 of the cylinder head are used to cool the upper area and the lower 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 31 and the second water outlet 32 ​​of the second water jacket 3 are designed to be close to the first water inlet 21 and the first water outlet 22 respectively, which improves the integration of the cylinder head and facilitates the water inlet and outlet design of the entire water jacket system.

[0062] 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 2 and the second water jacket 3, and the shapes of the first water jacket 2 and the second water jacket 3 at the position of the exhaust passage 4 are consistent with the shape of the exhaust passage 4.

[0063] 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 2 and the second water jacket 3 respectively, thereby improving the cooling effect. Among them, the shape of the first water jacket 2 and the second water jacket 3 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 2 and the second water jacket 3 at the exhaust duct 4 are the same or similar, thereby increasing the contact area between the first water jacket 2 and the second water jacket 3 and the exhaust duct 4, thereby improving the cooling effect on the exhaust duct 4.

[0064] 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.

[0065] Specifically, in this embodiment, the cylinder head of the engine adopts the cylinder head provided by the first aspect of the utility model, which has a good cooling effect on the exhaust side, reduces the temperature difference between the exhaust side and the intake side of the entire engine, and improves the working performance of the engine.

[0066] According to a third aspect of the utility model, a vehicle is provided, comprising the engine described in the second aspect.

[0067] Specifically, in this embodiment, the vehicle adopts the engine provided by the second aspect of the utility model, which has high working performance, thereby improving the overall performance and safety of the vehicle.

[0068] 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.

[0069] 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, characterized in that: include: A first water jacket (2) for coolant to flow to cool the cylinder head, wherein the first water jacket (2) is located on the exhaust side of the cylinder head; The first water jacket (2) comprises a first main body (25) and a second main body (26), wherein the first main body (25) and the second main body (26) are arranged side by side and extend respectively along the front-to-back direction of the cylinder head, wherein the front-to-back direction is the direction from the front end of the engine to the rear end of the engine.

2. The cylinder head according to claim 1, characterized in that: The first body (25) and the second body (26) are connected to each other at the front end of the cylinder head; The first body (25) is provided with a first water inlet (21) at the rear end of the cylinder head, and the second body (26) is provided with a first water outlet (22) at the rear end of the cylinder head.

3. The cylinder head according to claim 1, characterized in that: The engine comprises a plurality of exhaust valve ducts (27) arranged at intervals along the front-rear direction, the plurality of exhaust valve ducts (27) being arranged between the first body and the second body, and the first body (25) and the second body (26) being separated from each other at least at positions where the plurality of exhaust valve ducts (27) are located.

4. The cylinder head according to claim 3, characterized in that: The engine also includes an integrated exhaust manifold (7), a spark plug (5) and a fuel injector (6), The first body (25) can extend at least to the top of the integrated exhaust manifold (7), and the second body (26) can extend at least to the periphery of the spark plug (5) and the periphery of the fuel injector (6).

5. The cylinder head according to claim 3, characterized in that: The engine further comprises a plurality of intake valve guides (8) arranged at intervals along the front-rear direction. The second body is located between the plurality of exhaust valve conduits (27) and the plurality of intake valve conduits (8), and the contours on both sides of the second body (26) are respectively consistent with the contours of the plurality of exhaust valve conduits (27) and the plurality of intake valve conduits (8).

6. The cylinder head according to claim 3, characterized in that: A plurality of flow channels (28) are arranged at intervals in the first main body (25); one end of each of the plurality of flow channels (28) is connected to the first water inlet (21), and the other end of each of the plurality of flow channels converges and is connected to the second main body (26).

7. The cylinder head according to claim 6, characterized in that The plurality of flow channels (28) have the same width and are evenly arranged along the width direction of the first body (25).

8. The cylinder head according to claim 2, characterized in that: The first water jacket (2) further comprises a water outlet pipe (29), the second main body (26) is close to the air intake side of the cylinder head, the water outlet pipe (29) is connected to the second main body (26) at the rear end of the cylinder head, and the first water outlet (22) is formed on the air intake side.

9. The cylinder head according to claim 8, characterized in that It also includes a second water jacket (3), wherein the first water jacket (2) is used for cooling liquid to flow so as to cool the upper area of ​​the cylinder head, and the second water jacket (3) is used for cooling liquid to flow so as to cool the lower area of ​​the cylinder head; The second water jacket (3) is provided with a second water inlet (31) and a second water outlet (32); the second water inlet (31) is close to the first water inlet (21), and the second water outlet (32) is close to the first water outlet (22).

10. The cylinder head according to claim 9, characterized in that An exhaust passage (4) is also provided on the cylinder head. The exhaust passage (4) is located between the first water jacket (2) and the second water jacket (3). The shapes of the first water jacket (2) and the second water jacket (3) at the positions of the exhaust passage (4) are consistent with the shape of the exhaust passage.

11. An engine, characterized in that: It comprises a cylinder block and a cylinder head according to any one of claims 1 to 10.

12. A vehicle, characterized in that: Comprising the engine as claimed in claim 11.

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