Exhaust manifold, engine assembly and vehicle
By designing cooling medium channels and partition structures in the exhaust manifold, the full coverage and precision cooling of the exhaust manifold is achieved, which solves the problem of poor cooling effect of the exhaust manifold in the prior art, extends the service life of the exhaust manifold and improves the heat dissipation uniformity.
Patent Information
- Application Number
- CN202421754456.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The existing exhaust manifolds in the automotive field are separated from the water jacket, resulting in poor cooling effect, long-term high temperatures near the exhaust manifold, damage to sensitive components, and affecting the service life of the vehicle.
An exhaust manifold is designed, by forming a cooling medium channel between the first pipe body and the second pipe body, the cooling medium channel fully covers the first pipe body and accurately cools, and the cooling medium channel is separated into a plurality of sub-media channels through a partition structure to improve heat dissipation uniformity.
Effectively reduce the risk of high temperature damage to exhaust manifolds and surrounding components, extend the service life of exhaust manifolds, and improve heat dissipation uniformity.
Smart Images
Figure CN222936825U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engines, and in particular to an exhaust manifold, an engine assembly having the exhaust manifold, and a vehicle having the engine assembly. Background Art
[0002] In the related art, the temperature of the exhaust manifold is relatively high (the exhaust temperature can reach 800-900 °C), and a water jacket needs to be provided to cool the exhaust manifold. However, the conventional exhaust manifold applied in the automotive field is separated from the water jacket at present, that is, the exhaust manifold is cooled by a separate water jacket outside the exhaust manifold, and the water jacket cannot completely cover the exhaust manifold, resulting in poor cooling effect. As a result, the heat of the exhaust manifold causes the area near the exhaust manifold to be in a high-temperature state through heat radiation and other means, thereby reducing the service life of the sensitive components near the exhaust manifold and ultimately affecting the service life of the vehicle. Summary of the Utility Model
[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide an exhaust manifold, so that the cooling medium channel completely covers the first pipe body and accurately cools it, reducing the risk of damage to the exhaust manifold and surrounding components due to high temperature.
[0004] The utility model further provides an engine assembly.
[0005] The utility model further provides a vehicle.
[0006] The exhaust manifold according to an embodiment of the utility model includes: a first pipe body and a second pipe body. The first pipe body defines an exhaust passage for communicating with the engine exhaust port of the engine. The second pipe body is sleeved on the first pipe body, and the second pipe body and the first pipe body are spaced apart to form a cooling medium channel between the second pipe body and the first pipe body; a partition structure is arranged in the cooling medium channel, and the partition structure divides the cooling medium channel into a plurality of sub-medium channels. The plurality of sub-medium channels are all used for communicating with the cooling water jacket of the engine, and the plurality of sub-medium channels are in heat exchange cooperation with the exhaust passage.
[0007] According to the exhaust manifold of the embodiment of the utility model, by spacing the second pipe body and the first pipe body apart to form a cooling medium channel between the second pipe body and the first pipe body, the cooling medium channel can completely cover the first pipe body and accurately cool it, thereby reducing the risk of damage to the exhaust manifold and surrounding components due to high temperature. Moreover, the partition structure divides the cooling medium channel into a plurality of sub-medium channels, which can make the flow rates of the cooling medium in the plurality of sub-medium channels tend to be consistent, facilitating improving the heat dissipation uniformity of the first pipe body, and thus extending the service life of the exhaust manifold.
[0008] In some embodiments of the present utility model, a plurality of sub-medium channels all extend along the axial direction of the exhaust manifold, and the plurality of sub-medium channels are arranged in sequence along the circumferential direction of the exhaust manifold.
[0009] In some embodiments of the present utility model, the separating structure includes a separating plate, the separating plate is connected between the first pipe body and the second pipe body, and the separating plate extends along the axial direction of the exhaust manifold.
[0010] In some embodiments of the present utility model, there are a plurality of separating plates, the plurality of separating plates are arranged in sequence along the circumferential direction of the exhaust manifold, and two adjacent separating plates are spaced apart.
[0011] In some embodiments of the present utility model, the plurality of separating plates are evenly arranged along the circumferential direction of the exhaust manifold.
[0012] In some embodiments of the present utility model, the first pipe body, the second pipe body and the separating structure are integrally formed.
[0013] In some embodiments of the present utility model, the exhaust manifold is formed with a plurality of heat exchange medium inlets and a plurality of heat exchange medium outlets, the plurality of sub-medium channels, the plurality of heat exchange medium inlets and the plurality of heat exchange medium outlets correspond one by one, and the sub-medium channels communicate with the corresponding heat exchange medium inlets and heat exchange medium outlets, and both the heat exchange medium inlets and the heat exchange medium outlets are used for communicating with the cooling water jacket.
[0014] In some embodiments of the present utility model, the exhaust manifold further includes: a heat dissipation layer, and the heat dissipation layer is arranged on the outer surface of the second pipe body.
[0015] An engine assembly according to an embodiment of the present utility model includes: an engine; an exhaust manifold, the exhaust manifold being the exhaust manifold of the above embodiment, the exhaust manifold is integrally formed with the engine, the exhaust passage is communicated with the engine exhaust port of the engine, and the sub-medium channel is communicated with the cooling water jacket of the engine.
[0016] A vehicle according to an embodiment of the present utility model includes the engine assembly of the above embodiment.
[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings
[0018] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:
[0019] Figure 1 is a cross-sectional view of an exhaust manifold provided with three separating structures according to an embodiment of the present utility model;
[0020] Figure 2It is a cross-sectional view of an exhaust manifold provided with four partition structures according to an embodiment of the present utility model.
[0021] Reference numerals:
[0022] Exhaust manifold 100;
[0023] First pipe body 1;
[0024] Exhaust passage 11;
[0025] Second pipe body 2;
[0026] Cooling medium passage 21; Sub-medium passage 22; Heat exchange medium inlet 221;
[0027] Partition structure 3;
[0028] Partition plate 31. Detailed implementation manners
[0029] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.
[0030] Reference is made below to Figure 1 - Figure 2 Describe the exhaust manifold 100 according to an embodiment of the present utility model.
[0031] As Figure 1 and Figure 2 shown, the exhaust manifold 100 according to an embodiment of the present utility model includes: a first pipe body 1 and a second pipe body 2. The first pipe body 1 defines an exhaust passage 11, and the exhaust passage 11 is used to communicate with the engine exhaust port of the engine. The second pipe body 2 is sleeved on the first pipe body 1, and the second pipe body 2 and the first pipe body 1 are spaced apart to form a cooling medium passage 21 between the second pipe body 2 and the first pipe body 1; a partition structure 3 is provided in the cooling medium passage 21, and the partition structure 3 divides the cooling medium passage 21 into a plurality of sub-medium passages 22. The plurality of sub-medium passages 22 are all used to communicate with the cooling water jacket of the engine, and the plurality of sub-medium passages 22 are all in heat exchange cooperation with the exhaust passage 11.
[0032] Among them, the first pipe body 1 defines an exhaust passage 11. The exhaust passage 11 can guide the high-temperature and high-pressure gas generated by the engine operation to the exhaust system and finally discharge it outside the vehicle. The exhaust passage 11 is used to communicate with the engine exhaust port of the engine, which can ensure that the gas smoothly flows into the exhaust passage 11 from the exhaust port and is discharged from the vehicle, thereby ensuring the stable operation of the engine.
[0033] The second tube body 2 is sleeved on the first tube body 1. That is to say, the second tube body 2 can be arranged around the circumferential wall of the first tube body 1, and the second tube body 2 and the first tube body 1 are arranged at intervals to form a cooling medium channel 21 between the second tube body 2 and the first tube body 1. The cooling medium channel 21 is arranged around the first tube body 1, so as to achieve the effect of completely covering the first tube body 1 with the cooling medium channel 21 and accurately cooling it. As some embodiments of the present application, the cooling medium can be cooling water. The cooling medium can flow in the cooling medium channel 21 and exchange heat with the high-temperature gas in the exhaust channel 11, so as to reduce the temperature of the first tube body 1 and the gas in the first tube body 1, thereby reducing the temperature of the exhaust manifold 100, reducing the heat dissipation of the exhaust manifold 100 to the surroundings by conduction, and further reducing the risk of damage to the exhaust manifold 100 and the surrounding components due to high temperature, and prolonging the service life of the exhaust manifold 100.
[0034] The partition structure 3 can be configured as a partition wall. Along the radial direction of the exhaust manifold 100, the partition structure 3 has opposite ends, and the two ends of the partition structure 3 can be respectively connected to the first tube body 1 and the second tube body 2. As some embodiments of the present application, the partition structure 3, the first tube body 1 and the second tube body 2 can be integrally formed, so that the partition structure 3 is arranged in the cooling medium channel 21. As some embodiments of the present application, the two ends of the partition structure 3 can be respectively welded to the first tube body 1 and the second tube body 2, so that the partition structure 3 is arranged in the cooling medium channel 21.
[0035] As some embodiments of the present application, three partition structures 3 can be provided, and the three partition structures 3 divide the cooling medium channel 21 into three sub-medium channels 22. As some embodiments of the present application, four partition structures 3 can be provided, and the four partition structures 3 divide the cooling medium channel 21 into four sub-medium channels 22. However, the present application is not limited thereto, and the number and position of the partition structures 3 can be set according to the heat dissipation requirements of the exhaust manifold 100.
[0036] By providing a plurality of partition structures 3 to divide the cooling medium channel 21 into a plurality of sub-medium channels 22, and the plurality of sub-medium channels 22 are all communicated with the cooling water jacket of the engine, the cooling medium in the cooling water jacket can flow into the plurality of sub-medium channels 22 and cooperate with the exhaust channel 11 for heat exchange in the plurality of sub-medium channels 22. Compared with setting one cooling medium channel 21, setting a plurality of sub-medium channels 22 can make the flow rates of the cooling medium in the plurality of sub-medium channels 22 tend to be consistent, which is beneficial to improving the heat dissipation uniformity of the first tube body 1, thereby reducing the risk of damage to the exhaust manifold 100 caused by local overheating of the exhaust manifold 100, and is beneficial to prolonging the service life of the exhaust manifold 100.
[0037] Specifically, the first pipe body 1 defines an exhaust passage 11 so that the high-temperature gas generated by the engine operation can be discharged through the exhaust passage 11. The second pipe body 2 is sleeved on the first pipe body 1 and is spaced apart from the first pipe body 1 to form a cooling medium passage 21 between the second pipe body 2 and the first pipe body 1. The cooling medium flows in the cooling medium passage 21 and exchanges heat with the first pipe body 1, so that the cooling medium passage 21 fully covers the first pipe body 1 and precisely cools it. The second pipe body 2 is sleeved on the first pipe body 1, which not only improves the cooling effect but also facilitates the integrated design of the exhaust manifold 100, effectively reducing the volume of the exhaust manifold 100, thereby facilitating the reduction of the space occupied by the exhaust manifold 100 in the engine and further facilitating the vehicle layout.
[0038] When the cooling medium in the cooling water jacket flows into the cooling medium passage 21, along the circumferential direction of the exhaust manifold 100, since the flow rate of the cooling medium in the cooling medium passage 21 is uncontrollable, a partition structure 3 can be provided, and the partition structure 3, the second pipe body 2 and the first pipe body 1 are integrally formed, so that the partition structure 3 is arranged in the cooling medium passage 21 and divides the cooling medium passage 21 into a plurality of sub-medium passages 22, thereby enabling the cooling medium to flow in the plurality of sub-medium passages 22, which is conducive to the flow rates of the cooling medium in the plurality of sub-medium passages 22 to tend to be consistent, and further improving the heat dissipation uniformity of the first pipe body 1.
[0039] Thus, by spacing the second pipe body 2 apart from the first pipe body 1 to form a cooling medium passage 21 between the second pipe body 2 and the first pipe body 1, the cooling medium passage 21 can fully cover the first pipe body 1 and precisely cool it, thereby reducing the risk of damage to the exhaust manifold 100 and surrounding components due to high temperature. Moreover, the partition structure 3 divides the cooling medium passage 21 into a plurality of sub-medium passages 22, which can make the flow rates of the cooling medium in the plurality of sub-medium passages 22 tend to be consistent, conducive to improving the heat dissipation uniformity of the first pipe body 1, and thus extending the service life of the exhaust manifold 100.
[0040] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the plurality of sub-medium passages 22 all extend along the axial direction of the exhaust manifold 100, and the plurality of sub-medium passages 22 are arranged in sequence along the circumferential direction of the exhaust manifold 100.
[0041] Among them, the plurality of sub-medium passages 22 all extend along the axial direction of the exhaust manifold 100. Further, the extension lengths of the plurality of sub-medium passages 22 are adapted to the length of the exhaust manifold 100, so that the cooling medium in the plurality of sub-medium passages 22 can comprehensively cool the gas in the exhaust passage 11, reducing the risk that the second pipe body 2 cannot fully cover the first pipe body 1 due to the short length of the sub-medium passage 22, and thus reducing the risk that the heat of the exhaust manifold 100 is dissipated to the surroundings of the exhaust manifold 100 by conduction.
[0042] A plurality of sub-medium channels 22 are arranged in sequence along the circumferential direction of the exhaust manifold 100, which can cool the gas in the exhaust passage 11 along the circumferential direction, so that the circumferential temperature of the exhaust manifold 100 tends to be consistent, reducing the risk that the overheating of the local temperature of the exhaust manifold 100 causes heat to be transferred to the surroundings of the exhaust manifold 100, and also reducing the risk that the overheating of the local temperature of the exhaust manifold 100 causes damage to the exhaust manifold 100, thereby effectively prolonging the service life of the exhaust manifold 100.
[0043] In some embodiments of the present utility model, such as Figure 1 and Figure 2 shown, the partition structure 3 includes a partition plate 31, the partition plate 31 is connected between the first pipe body 1 and the second pipe body 2, and the partition plate 31 extends along the axial direction of the exhaust manifold 100.
[0044] Among them, the partition structure 3 includes a partition plate 31, the partition plate 31 is the partition wall in the above-mentioned embodiment, and the partition plate 31 can be but is not limited to being made of materials such as cast iron and aluminum alloy. Along the radial direction of the exhaust manifold 100, the partition plate 31 has opposite ends, and the two ends of the partition plate 31 can be respectively connected to the first pipe body 1 and the second pipe body 2. As some embodiments of the present application, the partition plate 31, the first pipe body 1 and the second pipe body 2 are integrally formed so that the partition plate 31 is connected between the first pipe body 1 and the second pipe body 2. As some embodiments of the present application, the two ends of the partition plate 31 can be respectively welded to the first pipe body 1 and the second pipe body 2 so that the partition plate 31 is connected between the first pipe body 1 and the second pipe body 2.
[0045] The partition plate 31 extends along the axial direction of the exhaust manifold 100. Further, the extension length of the partition plate 31 is adapted to the length of the exhaust manifold 100, so that the partition plate 31 divides the cooling medium channel 21 into a plurality of sub-medium channels 22, which is beneficial to the stable flow of the cooling medium in the corresponding sub-medium channels 22, reducing the risk of the cooling medium in any two adjacent sub-medium channels 22 converging, thereby reducing the risk of the cooling medium generating eddy currents in the cooling medium channel 21, and further improving the heat exchange effect of the cooling medium.
[0046] In some embodiments of the present utility model, such as Figure 1 and Figure 2 shown, there are a plurality of partition plates 31, and the plurality of partition plates 31 are arranged in sequence along the circumferential direction of the exhaust manifold 100, and two adjacent partition plates 31 are spaced apart.
[0047] Among them, in some embodiments of the present application, three partition plates 31 may be provided. The three partition plates 31 are arranged in sequence along the circumferential direction of the exhaust manifold 100, and any two adjacent partition plates 31 among the three partition plates 31 are spaced apart, so that the three partition plates 31 divide the cooling medium channel 21 into three sub-medium channels 22. In some embodiments of the present application, four partition plates 31 may be provided. The four partition plates 31 are arranged in sequence along the circumferential direction of the exhaust manifold 100, and any two adjacent partition plates 31 among the four partition plates 31 are spaced apart, so that the four partition plates 31 divide the cooling medium channel 21 into four sub-medium channels 22. However, the present application is not limited thereto, and the number and position of the partition plates 31 may be set according to the heat dissipation requirements of the exhaust manifold 100.
[0048] Specifically, when the flow rates of the cooling media in the multiple sub-medium channels 22 tend to be consistent, so that the circumferential temperature of the exhaust manifold 100 tends to be consistent, it indicates that the number and position of the partition plates 31 can meet the cooling requirements of the exhaust manifold 100. When the flow rate of the cooling medium in any one of the sub-medium channels 22 is too fast, resulting in the occurrence of eddy currents of the cooling medium in the sub-medium channel 22, thereby causing the temperature of the corresponding part of the exhaust manifold 100 in the sub-medium channel 22 to be too high, a partition plate 31 can be added in the sub-medium channel 22, so that the flow rate of the cooling medium in the corresponding sub-medium channel 22 can be controlled, effectively reducing the pressure drop of the cooling medium in the sub-medium channel 22, enabling the cooling medium with a low pressure drop to precisely cool the exhaust manifold 100, facilitating the circumferential temperature of the exhaust manifold 100 to tend to be consistent, reducing the risk of damage to the exhaust manifold 100 caused by local overheating of the circumferential temperature of the exhaust manifold 100, and further effectively extending the service life of the exhaust manifold 100. Further, the size and number of the sub-medium channels 22 can also be obtained by jointly calculating the actual heat exchange capacity of the exhaust manifold 100 and the actual engineering requirements of the engine.
[0049] In some embodiments of the present invention, such as Figure 1 and Figure 2 shown, a plurality of partition plates 31 are uniformly arranged along the circumferential direction of the exhaust manifold 100.
[0050] Among them, a plurality of partition plates 31 are uniformly arranged along the circumferential direction of the exhaust manifold 100, which can make the flow rates of the cooling media in the multiple sub-medium channels 22 more consistent, facilitating the cooling medium to uniformly cool the gas in the exhaust passage 11 along the circumferential direction, making the circumferential temperature of the exhaust manifold 100 more consistent, further reducing the risk of damage to the exhaust manifold 100 caused by local overheating of the circumferential temperature of the exhaust manifold 100, and further extending the service life of the exhaust manifold 100.
[0051] In some embodiments of the present invention, such as Figure 1 and Figure 2As shown, the first pipe body 1, the second pipe body 2 and the partition structure 3 are integrally formed.
[0052] Among them, the first pipe body 1, the second pipe body 2 and the partition structure 3 are integrally formed. That is to say, the first pipe body 1, the second pipe body 2 and the partition structure 3 are configured as an integrally formed part. The integrally formed part has good structural strength. By integrally forming the first pipe body 1, the second pipe body 2 and the partition structure 3, the connection reliability of the first pipe body 1, the second pipe body 2 and the partition structure 3 can be improved, and the probability of fracture at the joints between the first pipe body 1 and the partition structure 3 and between the second pipe body 2 and the partition structure 3 can be reduced, which is beneficial to improving the working reliability of the exhaust manifold 100, thereby improving the structural stability and service life of the exhaust manifold 100. Moreover, since the first pipe body 1, the second pipe body 2 and the partition structure 3 are integrally formed, the number of molds for manufacturing the exhaust manifold 100 can be reduced, thereby effectively reducing the production cost of the exhaust manifold 100.
[0053] Furthermore, by integrally forming the first pipe body 1, the second pipe body 2 and the partition structure 3, the thermal conductivity between the first pipe body 1, the second pipe body 2 and the partition structure 3 can be improved, enabling heat to be transferred between the first pipe body 1, the second pipe body 2 and the partition structure 3. The first pipe body 1, the second pipe body 2 and the partition structure 3 can act as the fin function of the exhaust manifold 100, which is beneficial to the heat of the high-temperature gas being transferred to the outside of the exhaust manifold 100 through the first pipe body 1, the partition structure 3 and the second pipe body 2 respectively, thereby increasing the heat dissipation capacity of the exhaust manifold 100.
[0054] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the exhaust manifold 100 is formed with a plurality of heat exchange medium inlets 221 and a plurality of heat exchange medium outlets. The plurality of sub-medium channels 22, the plurality of heat exchange medium inlets 221 and the plurality of heat exchange medium outlets correspond one by one, and the sub-medium channels 22 communicate with the corresponding heat exchange medium inlets 221 and heat exchange medium outlets. Both the heat exchange medium inlets 221 and the heat exchange medium outlets are used for communicating with the cooling water jacket.
[0055] Among them, the plurality of sub-medium channels 22, the plurality of heat exchange medium inlets 221 and the plurality of heat exchange medium outlets correspond one by one. That is to say, one sub-medium channel 22 corresponds to one heat exchange medium inlet 221 and one heat exchange medium outlet. The sub-medium channels 22 communicate with the corresponding heat exchange medium inlets 221 and the corresponding heat exchange medium outlets, so that the cooling medium can flow into the corresponding sub-medium channels 22 from the heat exchange medium inlets 221 and flow out of the corresponding sub-medium channels 22 from the heat exchange medium outlets. Both the heat exchange medium inlets 221 and the heat exchange medium outlets are used for communicating with the cooling water jacket. As some embodiments of the present application, both the heat exchange medium inlets 221 and the heat exchange medium outlets are directly communicated with the cooling water jacket. As some embodiments of the present application, both the heat exchange medium inlets 221 and the heat exchange medium outlets are indirectly communicated with the cooling water jacket through connectors.
[0056] Specifically, the cooling medium in the cooling water jacket flows into the corresponding sub-medium channels 22 through the heat exchange medium inlet 221. The cooling medium exchanges heat with the gas in the exhaust passage 11 within the corresponding sub-medium channels 22. After heat exchange, the cooling medium flows out of the corresponding sub-medium channels 22 through the heat exchange medium outlet and returns to the cooling water jacket through the heat exchange medium outlet, so as to form a circulating cooling path between the engine's cooling water jacket and the sub-medium channels 22. When flowing through the sub-medium channels 22, the cooling medium can directly absorb the heat generated by the exhaust passage 11 and continue to circulate in the engine's cooling water jacket and the exhaust manifold 100, so that the cooling medium continuously cools the gas in the exhaust passage 11, effectively improving the heat dissipation efficiency of the engine cooling system.
[0057] In some embodiments of the present invention, the exhaust manifold 100 further includes: a heat dissipation layer (not shown in the figure), and the heat dissipation layer is provided on the outer surface of the second pipe body 2.
[0058] Among them, the heat dissipation layer can be made of materials with good heat conduction performance and high temperature resistance performance, such as: cast iron, alloy, stainless steel and other materials. Alloy and stainless steel materials can not only effectively conduct heat, but also maintain stable performance in high temperature environments, which is conducive to improving the service life of the heat dissipation layer. The heat dissipation layer can be provided on the outer surface of the second pipe body 2, which can increase the heat exchange area between the second pipe body 2 and the surrounding environment, thereby accelerating the dissipation of heat, helping to reduce the temperature of the second pipe body 2, which is conducive to reducing the temperature of the components around the exhaust manifold 100, and can further extend the service life of the exhaust manifold 100 and its surrounding components.
[0059] The engine assembly according to the embodiment of the present invention includes: an engine; an exhaust manifold 100, and the exhaust manifold 100 is the exhaust manifold 100 of the above embodiment. The exhaust manifold 100 is integrally formed with the engine. The exhaust passage 11 is communicated with the engine exhaust port of the engine, and the sub-medium channel 22 is communicated with the cooling water jacket of the engine.
[0060] Among them, the casting material of the exhaust manifold 100 can be the same as that of the engine, so that the exhaust manifold 100 and the engine can be integrally cast, which is beneficial to improving the connection reliability between the exhaust manifold 100 and the engine. Moreover, integral casting does not require additional connecting parts and seals between the exhaust manifold 100 and the engine, which can reduce the weight of the engine assembly, which is beneficial to the lightweight design of the vehicle, and can also shorten the exhaust path to improve the thermal efficiency of the engine assembly. Further, the thickness of each part of the exhaust manifold 100 should meet the strength requirements, stress requirements and fatigue durability requirements, so as to reduce the risk of damage or even fracture of the exhaust manifold 100, and thus improve the use reliability of the engine assembly.
[0061] The size and shape of the first pipe body 1 are adapted to the size and shape of the engine exhaust port, so that the exhaust passage 11 can be smoothly communicated with the engine exhaust port of the engine, thereby ensuring that the exhaust gas is discharged smoothly from the cylinder, which helps to reduce the exhaust back pressure and improve the output power and efficiency of the engine. The sub-medium passage 22 is communicated with the cooling water jacket of the engine, so that the cooling water jacket of the engine and the sub-medium passage 22 form a circulating cooling path. When the cooling medium flows through the sub-medium passage 22, it can directly absorb the heat generated by the exhaust manifold 100 and continue to circulate in the cooling water jacket of the engine and the exhaust manifold 100, so that the cooling medium continuously cools the gas in the exhaust passage 11, thereby improving the heat dissipation efficiency of the engine cooling system, helping the engine to operate in a more stable working environment, and further improving the performance and stability of the engine components.
[0062] The vehicle according to the embodiment of the present invention includes the engine assembly of the above embodiment. By spacing the second pipe body 2 and the first pipe body 1 apart to form a cooling medium passage 21 between the second pipe body 2 and the first pipe body 1, the cooling medium passage 21 can cover the first pipe body 1 completely and cool it precisely, so that the exhaust temperature of the exhaust manifold 100 can be effectively controlled, thereby reducing the risk of damage to the exhaust manifold 100 and surrounding components due to high temperature. Moreover, the partition structure 3 divides the cooling medium passage 21 into multiple sub-medium passages 22, which can make the flow rates of the cooling medium in the multiple sub-medium passages 22 tend to be consistent, and can also enhance the structural stability of the exhaust manifold 100, which is beneficial to improving the heat dissipation uniformity of the first pipe body 1 and reducing the risk of local overheating of the first pipe body 1, thereby extending the service life of the exhaust manifold 100 and the vehicle.
[0063] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0064] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.
Claims
1. An exhaust manifold, characterized in that: include: A first tube body and a second tube body, wherein the first tube body defines an exhaust passage, the exhaust passage being used to communicate with an engine exhaust port of an engine, the second tube body being sleeved on the first tube body, the second tube body being spaced apart from the first tube body to form a cooling medium passage between the second tube body and the first tube body; A partition structure is provided in the cooling medium channel, and the partition structure divides the cooling medium channel into a plurality of sub-medium channels, wherein the plurality of sub-medium channels are all used to communicate with the cooling water jacket of the engine, and the plurality of sub-medium channels are all used to cooperate with the exhaust channel for heat exchange.
2. The exhaust manifold according to claim 1, characterized in that: The plurality of sub-media channels all extend along the axial direction of the exhaust manifold, and the plurality of sub-media channels are sequentially arranged along the circumferential direction of the exhaust manifold.
3. The exhaust manifold according to claim 2, characterized in that: The partition structure includes a partition plate connected between the first pipe body and the second pipe body, and the partition plate extends along the axial direction of the exhaust manifold.
4. The exhaust manifold according to claim 3, characterized in that: There are a plurality of partition plates, which are arranged in sequence along the circumference of the exhaust manifold, and two adjacent partition plates are spaced apart.
5. The exhaust manifold according to claim 4, characterized in that The plurality of partition plates are evenly arranged along the circumference of the exhaust manifold.
6. The exhaust manifold according to claim 1, characterized in that The first tube body, the second tube body and the partition structure are integrally formed.
7. The exhaust manifold according to claim 1, characterized in that The exhaust manifold is formed with a plurality of heat exchange medium inlets and a plurality of heat exchange medium outlets, and the plurality of sub-medium channels, the plurality of heat exchange medium inlets and the plurality of heat exchange medium outlets correspond to each other one by one, and the sub-medium channels are connected with the corresponding heat exchange medium inlets and the heat exchange medium outlets, and the heat exchange medium inlets and the heat exchange medium outlets are both used to communicate with the cooling water jacket.
8. The exhaust manifold according to any one of claims 1 to 7, characterized in that: Also includes: A heat dissipation layer is arranged on the outer surface of the second tube body.
9. An engine assembly, characterized in that: include: engine; An exhaust manifold, wherein the exhaust manifold is the exhaust manifold according to any one of claims 1 to 8, wherein the exhaust manifold is integrally formed with the engine, wherein the exhaust channel is connected to an engine exhaust port of the engine, and wherein the sub-medium channel is connected to a cooling water jacket of the engine.
10. A vehicle, characterized in that: Comprising an engine assembly according to claim 9.