Cylinder cover structure, engine and vehicle

Abstract

The utility model provides a cylinder cover structure, an engine and a vehicle. The cylinder cover structure comprises a first water jacket, a second water jacket, a connecting channel and an air overflow channel. The first water jacket and the second water jacket extend in the first direction, the first water jacket extends in the second direction along an arch-shaped path, the middle of the arch-shaped path protrudes towards the third direction, the first water jacket is connected with a liquid inlet channel, the second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and the second direction. The second water jacket is located on the side, facing the third direction, of the first water jacket and connected with a liquid outlet channel. The connecting channel is communicated with one side, back to the third direction, of the second water jacket and one side, facing the third direction, of the middle of the first water jacket in the second direction; and the gas overflow channel is communicated to one side, facing the third direction, of the second water jacket. Therefore, the gas overflow pipeline only needs to be connected with one gas overflow channel, the number of parts is reduced, and the compactness and reliability of the engine are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle parts, and particularly relates to a cylinder head structure, an engine and a vehicle. Background Art

[0002] With the popularization of various hybrid vehicle models, in order to adapt to the changes in the usage requirements of engines on hybrid vehicle models, especially the strong requirement for improving fuel economy. In order to improve fuel economy, the concept of lightweight design is becoming more and more popular. To meet this demand, the integrated exhaust manifold structure is increasingly applied to the cylinder head. At the same time, in addition to the existing main water jacket for cooling the combustion chamber inside the cylinder head, a collecting and draining water jacket for cooling the integrated exhaust manifold is added.

[0003] In order to ensure the cooling performance of the combustion chamber and the exhaust passage, an air overflow channel needs to be provided on the engine to lead the boiling steam generated in the high-temperature areas of the main water jacket of the cylinder head and the collecting and draining water jacket to an overflow water tank. Generally, the collecting and draining water jacket is higher than the main water jacket of the cylinder head, and the highest point of the collecting and draining water jacket is located in the middle. Therefore, an air overflow channel is provided at the highest point of the main water jacket of the cylinder head and the highest point of the collecting and draining water jacket respectively to ensure that the gas inside the main water jacket and the collecting and draining water jacket can be discharged smoothly. However, the two air overflow channels need to be connected to the vehicle overflow water tank through a complex overflow pipeline, resulting in an increase in the weight and cost of the vehicle, and the increase in components also leads to a decrease in the reliability of the vehicle. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a cylinder head structure, an engine and a vehicle, aiming to solve the technical problem that two air overflow channels need to be provided on the current engine cylinder head to achieve exhaust, resulting in a decrease in the reliability of the vehicle.

[0005] The utility model is realized as follows. In the first aspect, a cylinder head structure is provided, which includes a first water jacket, a second water jacket, a connecting channel and an air overflow channel;

[0006] The first water jacket extends along a first direction, and the first water jacket extends along an arched path in a second direction. The middle part of the arched path protrudes towards a third direction. The first water jacket is connected with a liquid inlet channel. The second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and perpendicular to the second direction;

[0007] The second water jacket extends along the first direction and is located on one side of the first water jacket facing the third direction. The second water jacket is connected with a liquid outlet channel;

[0008] The connecting channel communicates with one side of the second water jacket facing away from the third direction and one side of the middle part of the first water jacket in the second direction facing the third direction;

[0009] The air overflow passage is communicated with one side of the second water jacket facing the third direction.

[0010] In one embodiment of the first aspect, the connecting passage extends along the third direction.

[0011] In one embodiment of the first aspect, the air overflow passage includes a first passage segment, a second passage segment and a third passage segment which are communicated in sequence. The first passage segment is communicated with the second water jacket. The inner diameter of the second passage segment is smaller than that of the first passage segment and smaller than that of the third passage segment.

[0012] In one embodiment of the first aspect, the extending length of the third passage segment is smaller than that of the first passage segment.

[0013] In one embodiment of the first aspect, the air overflow passage extends along the third direction.

[0014] In one embodiment of the first aspect, the first water jacket and the second water jacket are arranged along the second direction, the first water jacket and the second water jacket are arranged in an interleaved manner in the third direction, and the air overflow passage is connected to one end of the second water jacket facing away from the second direction.

[0015] In one embodiment of the first aspect, the liquid inlet passage is connected to one side of the first water jacket facing away from the second direction, and at least one liquid inlet passage is provided.

[0016] In one embodiment of the first aspect, the liquid outlet passage is arranged on one side of the second water jacket facing the first direction and / or one side of the second water jacket facing away from the first direction.

[0017] In a second aspect, an engine is provided, including the cylinder head structure according to the above embodiments.

[0018] In a third aspect, a vehicle is provided, including the engine provided in the above embodiments.

[0019] The technical effects of the present utility model compared with the prior art are as follows: The coolant first enters the first water jacket through the liquid inlet channel, then enters the second water jacket through the connecting channel, and then flows out through the liquid outlet channel. In this way, the coolant can flow from bottom to top to fill the entire cavity, so as to achieve the cooling of the cylinder head. By arranging the connecting channel at the top of the arched part of the first water jacket in the cylinder head structure, the gas in the first water jacket enters the second water jacket along the flow direction of the coolant. At the same time, since the connection part of the connecting channel in the first water jacket is at the highest point of the first water jacket, it can avoid the accumulation of the gas overflowing from the coolant elsewhere. In this way, the gas overflowing from the first water jacket and the second water jacket can be discharged through the air overflow channel connected to the second water jacket, and there is no need to additionally arrange an air overflow channel on the first water jacket. The air overflow pipeline only needs to be connected to one air overflow channel, which reduces the number of parts, improves the compactness and reliability of the engine, and reduces the weight and cost of the whole vehicle. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments of the present utility model or the description of the prior art. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of the engine provided by the embodiment of the present utility model;

[0022] Figure 2 is Figure 1 a three-dimensional assembly drawing of the cylinder head structure and the cylinder block water jacket in

[0023] Figure 3 is Figure 1 a side view assembly drawing of the cylinder head structure and the cylinder block water jacket in

[0024] Description of the Reference Numerals:

[0025] 100, cylinder head structure; 10, first water jacket; 11, liquid inlet channel; 20, second water jacket; 21, liquid outlet channel; 30, connecting channel; 40, air overflow channel; 41, first channel section; 42, second channel section; 43, third channel section; 90, engine; 91, cylinder block; 92, cylinder head; 911, cylinder block water jacket; 9111, liquid inlet; 93, air overflow pipeline. Detailed Embodiments

[0026] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, and does 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 construed as limiting the present utility model.

[0028] In this embodiment, according to Figure 1 and Figure 2 the established XYZ rectangular coordinate system is defined as follows: the side located in the positive direction of the X-axis is defined as the front, and the side located in the negative direction of the X-axis is defined as the rear; the side located in the positive direction of the Y-axis is defined as the left, and the side located in the negative direction of the Y-axis is defined as the right; the side located in the positive direction of the Z-axis is defined as the upper, and the side located in the negative direction of the Z-axis is defined as the lower.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0030] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] In order to make the purpose, technical solution and advantages of the present utility model more clear, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0032] An embodiment of the present utility model provides a vehicle, which includes a vehicle body and an engine 90 connected to the vehicle body, and the engine 90 is used to provide power for the vehicle body.

[0033] Please refer to Figure 1 , the engine 90 includes a cylinder, and the cylinder includes a cylinder block 91 and a cylinder head 92. The cylinder head 92 covers the cylinder block 91 to form a sealed combustion chamber. A cavity for the coolant to circulate is formed in the cylinder head 92, and the coolant is used to reduce the temperature of the cylinder head 92. The cavity formed in the cylinder head 92 forms a cylinder head structure 100, and a cylinder block water jacket 911 is formed in the cylinder block 91. It should be noted that the cylinder head structure 100 has no independent outer shell, and the outer shell of the cylinder head structure 100 in the figure represents the wall of the cavity.

[0034] Please refer to Figure 2 and Figure 3 , the cylinder head structure 100 includes a first water jacket 10, a second water jacket 20, a communication channel and an air overflow channel 40. Both the first water jacket 10 and the second water jacket 20 are mesh channel structures. The first water jacket 10 is connected to the second water jacket 20 through the communication channel. The first water jacket 10 is connected with a liquid inlet channel 11, and the liquid inlet channel 11 is connected with the cylinder block water jacket 911. The second water jacket 20 is connected with a liquid outlet channel 21. The coolant in the cylinder block water jacket 911 enters the first water jacket 10 through the liquid inlet channel 11, then enters the second water jacket 20 through the connection channel 30, and then is discharged through the liquid outlet channel 21. There is gas dissolved in the coolant or there are bubbles carried. As the coolant absorbs the heat of the cylinder head 92 and the temperature rises, the solubility of the gas in the coolant decreases and overflows from the coolant. The air overflow channel 40 is used to discharge the overflowed or carried gas to prevent affecting the heat dissipation performance of the cylinder head 92, so as to avoid cavitation or rupture of the cylinder head 92 caused by the inability to discharge the gas.

[0035] The first water jacket 10 extends along a first direction, the first direction is the length direction of the first water jacket 10, and the first water jacket 10 extends along an arched path in a second direction, and the second direction is the width direction of the first water jacket 10. The middle of the arched path protrudes towards a third direction, wherein the second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and perpendicular to the second direction. In this embodiment, referring to the use direction of the engine 90, facing the first direction is towards the left, facing away from the second direction is towards the right, facing the second direction is towards the front, facing away from the second direction is towards the back, facing the third direction is upwards, and facing away from the third direction is downwards.

[0036] The second water jacket 20 extends along the first direction and is located on one side of the first water jacket 10 facing the third direction, that is, the second water jacket 20 has the same length direction as the first water jacket 10, and the second water jacket 20 is located above the first water jacket 10.

[0037] The connecting channel 30 communicates with the side of the second water jacket 20 facing away from the third direction and the side of the middle part of the first water jacket 10 in the second direction facing the third direction, that is, the connecting channel 30 is connected to the lower side of the second water jacket 20 and the upper side of the middle part of the first water jacket 10. Since the middle part of the first water jacket 10 arches upward, the gas in the first water jacket 10 can accumulate at the upper end of the middle part of the first water jacket 10. Due to the setting of the connecting channel 30, the gas in the first water jacket 10 can enter the second water jacket 20 through the connecting channel 30.

[0038] The air overflow channel 40 communicates with the side of the second water jacket 20 facing the third direction, that is, the air overflow channel 40 communicates with the upper side of the second water jacket 20. The gas entering the second water jacket 20 from the first water jacket 10 and the gas in the second water jacket 20 can both be discharged through the air overflow channel 40. The air overflow channel 40 is connected to an overflow water kettle through an overflow pipeline 93, and the overflow water kettle is used to store the liquid overflowing from the air overflow channel 40.

[0039] The coolant first enters the first water jacket 10 through the liquid inlet channel 11, then enters the second water jacket 20 through the connecting channel 30, and then flows out through the liquid outlet channel 21. In this way, the coolant can flow from bottom to top to fill the entire cavity to achieve the cooling of the cylinder head 92. The cylinder head structure 100 makes the gas in the first water jacket 10 enter the second water jacket 20 along the flow direction of the coolant by arranging the connecting channel 30 at the top of the arched part of the first water jacket 10. At the same time, since the connection part of the connecting channel 30 in the first water jacket 10 is at the highest point of the first water jacket 10, it is possible to avoid the gas overflowing from the coolant from converging elsewhere. In this way, the gas overflowing from the first water jacket 10 and the second water jacket 20 can both be discharged through the air overflow channel 40 connected to the second water jacket 20, and there is no need to additionally set an air overflow channel 40 on the first water jacket 10. The overflow pipeline 93 only needs to be connected to one air overflow channel 40, which reduces the number of parts, improves the compactness and reliability of the engine 90, and reduces the weight and cost of the whole vehicle.

[0040] In some embodiments, the connecting channel 30 extends in the third direction. In this way, the extending direction of the connecting channel 30 is the same as the buoyancy direction of the gas, and the gas accumulated at the upper end of the middle part of the first water jacket 10 can quickly enter the second water jacket 20, improving the efficiency of the gas entering the second water jacket 20.

[0041] Please refer to Figure 2 and Figure 3, in some embodiments, the air overflow channel 40 includes a first channel section 41, a second channel section 42, and a third channel section 43 that are sequentially connected. The first channel section 41 is connected to the second water jacket 20, and the third water jacket is in interference fit with the air overflow pipeline 93. Among them, the inner diameter of the second channel section 42 is smaller than the inner diameter of the first channel section 41 and smaller than the inner diameter of the third channel section 43. The second channel section 42 can limit the outflow of the coolant while allowing the gas to be discharged, avoiding the diversion of the coolant from the air overflow channel 40 and reducing the cooling effect.

[0042] During processing, the first channel section 41 and the third channel section 43 can be processed first. The first channel section 41 and the third channel section 43 are spaced apart, and the part between them forms a partition. Then, a punching tool is inserted through the third channel section 43 to punch a hole in the partition, and the hole punched in the partition forms the second channel. Alternatively, a cylindrical channel can be processed first, and then a cylindrical plug with an inner hole is inserted into the channel. The inner hole in the cylindrical plug forms the second channel, and the first channel section 41 and the third channel section 43 are respectively formed on both sides of the cylindrical plug.

[0043] Specifically, the diameter of the second channel section 42 is generally set to 0.5 mm to 3 mm. At this size, it can not only ensure the smooth discharge of the gas in the second water jacket 20, but also play a role in restricting the flow of the coolant. At the same time, it is also convenient for manufacturing in the production process. The diameters of the first channel section 41 and the third channel section 43 are generally 6 mm to 12 mm. If the diameters of the two are too small, it is not convenient for processing; if the diameters of the two are too large, the volume of the coolant in the cylinder head 92 is increased, which is not conducive to the warm-up of the engine 90, and at the same time, it will deteriorate the fuel consumption experience during the use of the engine 90.

[0044] Optionally, the extension length of the third channel section 43 is less than the extension length of the first channel section 41, so as to facilitate the punching tool to extend into the third channel to punch the partition. For the convenience of processing, generally, the extension length of the third channel section 43 is less than or equal to 50 mm.

[0045] Optionally, the air overflow channel 40 extends in the third direction, so that the gas can be discharged along the vertical channel, improving the gas discharge efficiency. At the same time, the vertical direction is also the direction with the closest distance from the second water jacket 20 to the upper surface of the cylinder head 92. The extension length of the vertically extending air overflow channel 40 is the smallest, which is convenient for processing and discharging the gas.

[0046] Please refer to Figure 2 and Figure 3, in some embodiments, the first water jacket 10 and the second water jacket 20 are arranged along the second direction. That is to say, the second water jacket 20 is located above and in front of the first water jacket 10. The first water jacket 10 and the second water jacket 20 are staggeredly arranged in the third direction. In this way, the middle area of the first water jacket 10 can be approximately directly opposite the rear end of the second water jacket 20 in the vertical direction, so that the connecting channel 30 can communicate with the middle of the first water jacket 10 and the rear end of the second water jacket 20 in the vertical direction.

[0047] Optionally, there are a plurality of connecting channels 30, and the plurality of connecting channels 30 are arranged at intervals in the left-right direction. In this way, the gas in the first water jacket 10 can enter the second water jacket 20 through the plurality of connecting channels 30, improving the efficiency of gas discharge in the first water jacket 10.

[0048] Please refer to Figure 2 and Figure 3 , in some embodiments, the air overflow channel 40 is connected to one end of the second water jacket 20 facing away from the second direction, that is, the rear end of the second water jacket 20. When the engine 90 is in use, the cylinder head 92 usually tilts with the rear end of the first water jacket 10 upward and the front end of the second water jacket 20 downward. In this way, the rear end of the second water jacket 20 becomes the high point of the second water jacket 20. Therefore, the gas in the second water jacket 20 can converge at the rear end of the second water jacket 20. Arranging the air overflow channel 40 at the rear end of the second water jacket 20 enables the gas converging in the second water jacket 20 to be quickly discharged, improving the exhaust efficiency.

[0049] Please refer to Figure 2 and Figure 3 , in some embodiments, the liquid inlet channel 11 is connected to the side of the first water jacket 10 facing away from the second direction, that is, the liquid inlet channel 11 is arranged at the rear side of the first water jacket 10, so that the coolant flowing out of the cylinder water jacket can directly enter the middle of the first water jacket 10 in the length direction, facilitating the coolant to spread evenly in the first water jacket 10, avoiding poor cooling effect at the other end when the coolant flows in from one end of the first water jacket 10 in the length direction, and improving the cooling effect of the first water jacket 10. Among them, there is at least one liquid inlet channel 11.

[0050] Optionally, a plurality of liquid inlet channels 11 are provided, and the plurality of liquid inlet channels 11 are arranged at intervals in the length direction of the first water jacket 10, so that the coolant flowing out of the cylinder water jacket 911 can enter the first water jacket 10 through the plurality of liquid inlet channels 11, thereby accelerating the heat exchange rate of the coolant and improving the heat exchange effect. Compared with setting the liquid inlet channel 11 at one end in the length direction of the first water jacket 10, setting the liquid inlet channel 11 at one end in the width direction of the first water jacket 10 can increase the space available for setting the first water jacket 10, facilitate the arrangement of the plurality of liquid inlet channels 11, and at the same time improve the uniformity of the coolant temperature in the first water jacket 10, further improving the heat dissipation effect. The cylinder water jacket 911 can also be arranged at the rear side of the first water jacket 10, so that the liquid inlet 9111 of the cylinder water jacket 911 can also face the rear side.

[0051] See also Figure 2 and Figure 3 In some embodiments, the liquid outlet channel 21 is disposed on the side of the second water jacket 20 facing the first direction or the side facing away from the first direction. That is, the liquid outlet channel 21 is disposed at one end of the length direction of the second water jacket 20, and can be disposed at the left end of the second water jacket 20 or the right end of the second water jacket 20. In this way, compared with the arrangement in which the liquid inlet 9111 of the cylinder water jacket 911 and the water outlet of the second water jacket 20 are at both ends of the length direction of the first water jacket 10, the pipeline connecting the liquid inlet 9111 of the cylinder water jacket 911 and the liquid outlet channel 21 of the second water jacket 20 in the engine 90 can be arranged shorter, thereby reducing the space occupied by the pipeline connecting the liquid inlet 9111 of the cylinder water jacket 911 and the liquid outlet channel 21 of the second water jacket 20, further improving the compactness and reliability of the engine 90, and reducing the weight and cost of the whole vehicle. Compared with the liquid inlet channel 11 and the liquid outlet channel 21 , the liquid inlet channel 11 and the liquid outlet channel 21 are disposed at both ends of the cylinder head structure 100 in the length direction, connecting the liquid inlet channel 11 and the liquid outlet channel 21 .

[0052] Optionally, liquid outlet channels 21 are provided at both ends of the second water jacket 20 in the length direction to improve the uniform flow of coolant in the second water jacket 20, thereby improving the cooling effect of the second water jacket 20 and increasing the flow rate of the coolant, further improving the heat exchange effect.

[0053] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A cylinder head structure, characterized in that: include: A first water jacket extends along a first direction, the first water jacket extends along an arched path in a second direction, a middle portion of the arched path protrudes toward a third direction, the first water jacket is connected to a liquid inlet channel, the second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and perpendicular to the second direction; a second water jacket extending along the first direction and located at a side of the first water jacket facing the third direction, the second water jacket being connected to a liquid outlet channel; a connecting channel connecting a side of the second water jacket facing away from the third direction and a side of a middle portion of the first water jacket in the second direction facing the third direction; The overflow channel is connected to the side of the second water jacket facing the third direction.

2. The cylinder head structure according to claim 1, characterized in that: The connecting channel extends along a third direction.

3. The cylinder head structure according to claim 1, characterized in that: The overflow channel includes a first channel section, a second channel section and a third channel section which are connected in sequence, the first channel section is connected to the second water jacket, and the inner diameter of the second channel section is smaller than the inner diameter of the first channel section and smaller than the inner diameter of the third channel section.

4. The cylinder head structure according to claim 3, characterized in that: An extension length of the third channel section is smaller than an extension length of the first channel section.

5. The cylinder head structure according to claim 1, characterized in that: The overflow channel extends along a third direction.

6. The cylinder head structure according to claim 1, characterized in that: The first water jacket and the second water jacket are arranged along the second direction, the first water jacket and the second water jacket are staggered in the third direction, and the overflow channel is connected to an end of the second water jacket facing away from the second direction.

7. The cylinder head structure according to claim 1, characterized in that: The liquid inlet channel is connected to a side of the first water jacket facing away from the second direction, and at least one liquid inlet channel is provided.

8. The cylinder head structure according to claim 1, characterized in that: The liquid outlet channel is arranged on a side of the second water jacket facing the first direction and / or a side facing away from the first direction.

9. An engine, characterized in that: The invention comprises a cylinder head structure 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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