Exhaust manifold, engine and vehicle

Abstract

The application discloses an exhaust manifold, an engine and a vehicle, and belongs to the technical field of engines.The exhaust manifold comprises a pipe body and a catalyst, and the catalyst is arranged in the pipe body.The catalyst is arranged in the pipe body, so that the exhaust gas generated by the engine can be in contact with the catalyst and subjected to a catalytic reaction after being discharged, the path of the exhaust gas from the exhaust port to the catalyst is significantly shortened, heat loss in the transmission process of the exhaust gas is reduced, a relatively high catalytic reaction temperature is maintained, the conversion efficiency of pollutants is improved, the content of harmful substances in tail gas is reduced, and thus a relatively ideal tail gas purification effect is achieved.

Description

Technical Field

[0001] This application relates to the field of engine technology, and in particular to an exhaust manifold, an engine, and a vehicle. Background Technology

[0002] The catalytic converter is a key component of a car's exhaust system, typically installed between the engine's exhaust manifold and exhaust pipe. It contains a carrier and a catalytically active material coated on the carrier's surface. During engine operation, exhaust gases pass through the catalytic converter and undergo a catalytic reaction with the catalytically active material, separating hydrocarbons (CH), carbon monoxide (CO), and nitrogen oxides (NOx) in the exhaust gases. X Catalytic converters transform harmful substances such as carbon dioxide (CO2), nitrogen (N2), and water (H2O) into relatively harmless substances, thereby helping to reduce the pollution of the environment by vehicle exhaust. Catalytic converters can play a certain purification role under different emission conditions and are an important technical means to achieve motor vehicle emission standards.

[0003] However, in related technologies, the conversion rate of harmful gases by the catalytic converter is low under certain operating conditions, resulting in unsatisfactory exhaust gas purification effects. Utility Model Content

[0004] This application provides an exhaust manifold, engine, and vehicle that improves the conversion rate of harmful gases, thereby at least partially solving the aforementioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, an exhaust manifold is provided, comprising: Pipe body; and The catalyst is disposed within the tube.

[0006] In some embodiments, the catalyst includes a housing that is part of the tube body.

[0007] In some embodiments, the catalyst includes a support located within the tube.

[0008] In some embodiments, the carrier includes a plurality of channels, the inner walls of which are coated with a catalyst coating.

[0009] In some embodiments, the carrier is made of metal and / or ceramic.

[0010] In some embodiments, the catalyst further includes a liner disposed between the carrier and the tube to secure the carrier within the tube.

[0011] In some embodiments, the gasket is made of ceramic.

[0012] In some embodiments, the pipe body includes multiple exhaust manifolds, and at least one of the exhaust manifolds contains the catalyst.

[0013] In some embodiments, the catalyst is configured in a one-to-one correspondence with the exhaust manifold.

[0014] In some embodiments, the pipe body includes an exhaust branch pipe and an exhaust main pipe, at least two of the exhaust branch pipes are connected to one of the exhaust main pipes, and the catalytic converter is disposed in the exhaust main pipe.

[0015] In some embodiments, an oxygen sensor is also included, which is disposed within the tube.

[0016] In some embodiments, the number of oxygen sensors is at least two, with at least one oxygen sensor located upstream of the catalyst and at least another oxygen sensor located downstream of the catalyst along the exhaust direction of the pipe.

[0017] According to a second aspect of this application, an engine is provided, including the exhaust manifold described in the above-described technical solution.

[0018] In some embodiments, a cylinder body is also included, with the tube integrally disposed within the cylinder body; or, The tube body is detachably connected to the cylinder body.

[0019] According to a third aspect of this application, a vehicle is also provided, including the exhaust manifold described in the above-described technical solution, or including the engine described in the above-described technical solution.

[0020] In the exhaust manifold of this application embodiment, the catalyst is disposed inside the pipe body, so that the exhaust gas generated by the engine can come into contact with the catalyst and carry out a catalytic reaction after being discharged. This significantly shortens the path of the exhaust gas from the outlet to the catalyst, thereby reducing heat loss during the exhaust gas transmission process. This helps to maintain a higher catalytic reaction temperature, which is conducive to improving the conversion rate of pollutants and reducing the content of harmful substances in the exhaust gas, thereby achieving a more ideal exhaust gas purification effect.

[0021] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0024] Figure 1 This is a schematic diagram of the engine structure provided in an exemplary embodiment of this disclosure; Figure 2 This is a schematic diagram of another engine provided in an exemplary embodiment of this disclosure.

[0025] Explanation of reference numerals in the attached figures: 10. Engine; 11. Cylinder block; 11a. Exhaust port; 100. Pipe body; 110. Exhaust branch pipe; 120. Exhaust main pipe; 200. Catalyst; 210. Carrier; 220. Gasket; 230. Channel; 300. Oxygen sensor. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0027] According to the first aspect of this application, referring to Figure 1 and Figure 2 This disclosure provides an exhaust manifold, including a pipe body 100 and a catalytic converter 200. Exemplarily, an engine 10 includes a cylinder block 11, which has a combustion chamber and an exhaust port 11a communicating with the combustion chamber. Fuel is burned in the combustion chamber to produce exhaust gas, which is discharged through the exhaust port 11a and enters the exhaust manifold. It should be understood that the exhaust manifold is part of the engine 10.

[0028] In some embodiments, the exhaust manifold includes a body 100 and a catalyst 200, wherein the catalyst 200 is disposed within the body 100. The body 100 may be a hollow structure to provide a passage for the flow of exhaust gases, and the material may be a high-temperature resistant metal or metal alloy to maintain stable mechanical strength and corrosion resistance in a high-temperature exhaust gas environment. Exemplarily, the body 100 may be formed within the cylinder block 11 of the engine 10. For example, a portion of the cylinder block 11 of the engine 10 may form the body 100.

[0029] For example, the catalyst 200 may include a carrier 210 with a porous structure, the surface of which is coated with a catalyst coating containing active components that can promote the oxidation or reduction reactions of pollutants such as carbon monoxide, hydrocarbons, and nitrogen oxides. The porous structure of the carrier 210 can increase the contact area between the gas and the catalyst to a certain extent, thereby helping to improve the catalytic reaction rate.

[0030] The catalytic converter 200 is installed near the exhaust port 11a, allowing the exhaust gas to enter the catalytic converter 200 for treatment relatively quickly after discharge. This arrangement reduces heat loss during exhaust gas transmission to some extent, helping to maintain the exhaust gas temperature within the range suitable for catalytic reaction. The high-temperature operation of the catalytic converter 200 is beneficial for improving the conversion rate of pollutants, thereby reducing the emission of harmful substances in the exhaust gas.

[0031] In the description of this application, "close" means that the distance between the catalytic converter 200 and the exhaust port 11a is relatively short, but it is not limited to a certain fixed value and can be adjusted according to the actual situation of the engine 10 structure and installation space.

[0032] In some embodiments, the catalytic converter 200 includes a housing that is part of the pipe body 100. This design integrates the catalytic converter 200 with the exhaust manifold, avoiding the need for a separate housing and connection to the pipe body 100 as in conventional solutions. Since the housing is directly integrated into the pipe body 100, the number of components is reduced, assembly processes are simplified, and manufacturing costs are lowered to some extent.

[0033] Furthermore, the integration of the casing and the pipe 100 reduces the number of joints, thereby lowering the risk of exhaust gas leakage due to gaps or poor sealing at the joints, which helps improve the sealing and stability of the exhaust system. At the same time, this structure is more compact in terms of spatial arrangement, which helps to reduce the volume of the exhaust system in the engine compartment 10, providing more available space for the arrangement of other components.

[0034] In some embodiments, refer to Figure 1 The catalyst 200 includes a support 210 located within the tube 100. Exemplarily, the support 210 can be a honeycomb substrate with a regular channel structure, such as a ceramic honeycomb or a metal honeycomb, with multiple channels extending along the gas flow direction formed inside to increase the contact area between the exhaust gas and the catalyst. To enhance chemical reaction activity, the channel surface of the support 210 can be coated with a catalytic coating containing noble metal components, such as platinum, palladium, or rhodium. These noble metals can promote redox reactions of carbon monoxide, hydrocarbons, and nitrogen oxides under suitable temperature conditions, thereby generating relatively harmless substances such as carbon dioxide, water, and nitrogen.

[0035] The carrier 210 is located inside the pipe body 100, allowing the high-temperature exhaust gas from the combustion chamber of the engine 10 to enter the catalytic converter 200 and contact the catalyst surface within a shorter path. Because the gas transmission path is shortened, less heat is lost during the transmission process, maintaining a relatively high exhaust gas temperature to some extent. This is beneficial for the catalytic reaction to occur within an optimal temperature range, thereby improving the conversion efficiency of pollutants. Conversely, if the catalytic converter 200 is far from the exhaust port 11a, the gas travels a longer transmission distance before reaching the catalyst, resulting in more significant heat loss and potentially reducing the catalytic reaction efficiency.

[0036] In some embodiments, the carrier 210 is made of metal and / or ceramic material, such as stainless steel, iron-chromium-aluminum alloy, ceramic, etc. These materials have higher mechanical strength and impact resistance, and can withstand greater vibration and thermal shock to a certain extent during the operation of the engine 10, thereby reducing the risk of performance degradation due to structural damage.

[0037] Furthermore, the high thermal conductivity of the metal material allows the catalyst 200 to heat up to the appropriate reaction temperature more quickly during the cold start phase, which helps to shorten the activation time of the catalyst 200 and thus reduces pollutant emissions during the cold start phase to some extent. In addition, the metal carrier 210 can form more airflow channels through a thin-walled design, thereby increasing the contact area between the exhaust gas and the catalyst without significantly increasing exhaust resistance, thereby improving catalytic conversion efficiency.

[0038] The channel structure of the metal carrier 210 is usually formed by alternating winding or stacking of corrugated sheets and flat sheets. The inner wall of each channel can be coated with a catalytic coating containing precious metal components to promote the oxidation-reduction reaction of carbon monoxide, hydrocarbons and nitrogen oxides under suitable temperature conditions, thereby generating substances that are relatively harmless to the environment.

[0039] In some embodiments, refer to Figure 1 The carrier 210 includes several channels 230, which can be through holes, corrugated holes, or other porous channel structures to increase the contact area between the exhaust gas and the catalyst, thereby improving the efficiency of the catalytic reaction. The inner wall of the channels 230 is coated with a catalyst coating. The catalyst may include precious metals such as platinum, palladium, and rhodium, or combinations thereof, to promote the oxidation or reduction reactions of carbon monoxide, hydrocarbons, and nitrogen oxides at a suitable temperature, converting them into relatively harmless products such as carbon dioxide, water, and nitrogen.

[0040] The pore 230 structure can, to a certain extent, ensure that exhaust gas flows evenly across the catalyst surface, reducing airflow short-circuiting and allowing each portion of exhaust gas to have the opportunity to contact the catalyst. Simultaneously, due to the surface area enlargement effect of the pore 230, catalytic conversion efficiency can be improved without significantly increasing exhaust resistance.

[0041] In terms of arrangement, the channels 230 are arranged along the airflow direction, so that the high-temperature exhaust gas can quickly enter the catalyst coating surface, reducing heat loss during the transmission process. This helps to maintain the exhaust gas temperature within a range suitable for catalytic reaction, thereby improving the conversion efficiency of pollutants and reducing the emission of harmful substances in the exhaust gas to a certain extent.

[0042] In some embodiments, the catalyst 200 further includes a gasket 220 disposed between the carrier 210 and the pipe body 100 to secure the carrier 210 within the pipe body 100. When the catalyst 200 carrier 210 is placed in the middle of the exhaust manifold, if the carrier 210 directly contacts the metal pipe body 100 or the outer casing, gas may leak along the contact gap. Furthermore, collisions between the carrier 210 and the metal surface may damage the structure of the carrier 210. Therefore, the gasket 220 placed between the carrier 210 and the pipe body 100 can, to some extent, buffer the contact force between them, reducing the impact of vibration and shock on the carrier 210.

[0043] The gasket 220 can be made of ceramic sealing gasket 220 or other high-temperature resistant materials. Its mechanical strength and elasticity allow the carrier 210 to maintain a relatively fixed position under vibration and impact during vehicle operation. At the same time, the gasket 220 also has a certain heat insulation effect, which helps to reduce the heat loss of exhaust gas when it reaches the catalyst, thereby maintaining the catalytic reaction temperature to a certain extent, which helps to improve the pollutant conversion efficiency and reduce the emission of harmful substances in the exhaust gas.

[0044] With this structural arrangement, the carrier 210 can be stably fixed and maintain catalytic reaction efficiency under the high temperature and high speed flow conditions of the engine exhaust 10, thereby improving the exhaust purification effect and extending the service life of the catalyst 200.

[0045] In some embodiments, the gasket 220 is made of ceramic material, such as alumina, zirconium oxide, or other high-temperature resistant ceramics. Ceramic materials have high mechanical strength and heat resistance, enabling them to maintain shape stability under the high-temperature conditions of engine exhaust 10, and to a certain extent withstand the impact forces caused by exhaust flow and vehicle vibration, thereby helping the carrier 210 to remain in a fixed position within the pipe body 100.

[0046] The thermal insulation properties of the ceramic gasket 220 reduce heat loss of exhaust gases before they flow through the carrier 210, which helps maintain the catalytic reaction temperature within a suitable range, thereby improving the conversion efficiency of carbon monoxide, hydrocarbons, and nitrogen oxides. Simultaneously, the strong chemical inertness of the ceramic material makes it less prone to chemical reactions or corrosion under the influence of the exhaust medium, contributing to extending the service life of the gasket 220 and the catalytic converter 200.

[0047] By using ceramic gasket 220, the stability of carrier 210, heat retention of gas flow, and long-term durability can be balanced to a certain extent, thereby enabling catalyst 200 to maintain a high purification rate under engine exhaust conditions.

[0048] In some embodiments, refer to Figure 2 As shown, the pipe body 100 includes a plurality of exhaust manifolds 110, and at least one exhaust manifold 110 is provided with a catalyst 200. Exemplarily, a portion of the exhaust manifolds 110 are provided with catalysts 200.

[0049] In some embodiments, the catalyst is provided in a one-to-one correspondence with the exhaust manifold. The number of catalysts 200 is the same as the number of exhaust manifolds 110, and the catalysts 200 are disposed within the exhaust manifolds 110. By directly arranging the catalysts 200 within each exhaust manifold 110, the exhaust gas can quickly come into contact with the catalyst after leaving the combustion chamber of the engine 10, thereby carrying out an oxidation-reduction reaction within a shorter path, which is beneficial to improving the conversion efficiency of pollutants.

[0050] This arrangement ensures that the exhaust gas from each branch pipe passes evenly through the catalyst 200, reducing the possibility of airflow short-circuiting or bypassing, and making the catalytic reaction more complete. To a certain extent, the catalyst 200 in each exhaust branch pipe 110 can also utilize the kinetic energy and heat of the exhaust gas flow to maintain a suitable temperature on the catalyst surface, thereby improving the exhaust gas purification effect and reducing the emission of harmful substances.

[0051] By distributing the catalytic converter 200 to each exhaust manifold 110, not only can the thermal management of the exhaust flow path be optimized, but also the effective treatment of each exhaust path can be achieved while ensuring the overall compact layout of the engine 10.

[0052] In some embodiments, refer to Figure 1 The pipe body 100 includes an exhaust branch pipe 110 and an exhaust main pipe 120. At least two exhaust branch pipes 110 are connected to an exhaust main pipe 120. A catalyst 200 is installed in the exhaust main pipe 120 so that the exhaust gas from multiple branch pipes can be collected and come into contact with the catalyst to carry out an oxidation-reduction reaction.

[0053] By arranging the catalyst 200 within the exhaust main pipe 120, the exhaust gas can enter the catalyst surface within a shorter path after converging in the exhaust branch pipe 110, which helps maintain the gas temperature and improves the catalytic reaction efficiency. The catalyst 200 within the exhaust main pipe 120 can also homogenize the airflow distribution of different branch pipes to a certain extent, allowing each part of the exhaust gas to fully contact the catalyst, thereby improving the pollutant conversion efficiency and reducing the emission of harmful substances in the exhaust gas to a certain extent.

[0054] This arrangement shortens the exhaust path to the catalyst 200 and optimizes the thermal management of the exhaust channel, allowing the catalyst 200 to maintain a suitable reaction temperature under the high-temperature exhaust conditions of the engine 10. This is beneficial for improving the exhaust gas purification effect and, to some extent, reduces the space occupied by the overall arrangement of the engine 10 and the catalyst 200.

[0055] In some embodiments, an oxygen sensor 300 is also included, which is disposed within the tube body 100. Compared to the conventional arrangement of the oxygen sensor 300 at the end cone of the catalyst 200, this embodiment installs the oxygen sensor 300 within the tube body 100, which is beneficial for obtaining oxygen concentration information in the exhaust gas earlier.

[0056] The oxygen sensor 300 typically includes a ceramic sensing element that measures the oxygen potential in the exhaust gas and calculates the corresponding oxygen concentration using the principle of chemical equilibrium. This information is converted into a voltage signal and transmitted to the engine control unit (ECU) of the engine 10. The ECU determines the deviation between the actual air-fuel ratio and the stoichiometric air-fuel ratio based on the sensor signal and adjusts the injection timing accordingly, enabling the engine 10 to achieve closed-loop control with excess air factor as the target. To a certain extent, this arrangement of the oxygen sensor 300 is beneficial for more timely adjustment of the combustion process, thereby improving the conversion efficiency of harmful substances such as hydrocarbons (CH), carbon monoxide (CO), and nitrogen oxides (NOx), allowing them to be more effectively converted into harmless substances such as nitrogen, water, and carbon dioxide, thus purifying exhaust emissions.

[0057] By placing the oxygen sensor 300 inside the pipe body 100, gas state information can be obtained before the exhaust gas enters the catalyst 200, which is beneficial to improving the accuracy of combustion control and exhaust gas purification effect of the engine 10. At the same time, it can simplify the sensor arrangement to a certain extent and improve the overall layout rationality of the exhaust system.

[0058] In some embodiments, at least two oxygen sensors 300 are used, with at least one oxygen sensor 300 located upstream of the catalytic converter 200 and at least another oxygen sensor 300 located downstream of the catalytic converter 200 along the exhaust direction of the pipe body 100. This arrangement facilitates comprehensive monitoring of the exhaust gas flow process. Specifically, the upstream oxygen sensor 300 monitors the oxygen concentration in the raw exhaust gas that has not been treated by the catalytic converter 200, and the measured signal is fed back to the engine control unit (ECU) of the engine 10. The ECU adjusts the fuel injection quantity based on this signal, thereby ensuring that the air-fuel mixture concentration of the engine 10 is close to the stoichiometric air-fuel ratio, optimizing combustion efficiency and reducing emissions.

[0059] The downstream oxygen sensor 300 monitors the oxygen concentration in the exhaust gas after treatment by the catalytic converter 200, and the feedback signal is also transmitted to the ECU. By comparing the oxygen concentration difference between the upstream and downstream sensors, the ECU can monitor the working status of the catalytic converter 200, promptly detect whether the catalytic converter 200 has failed or its efficiency has decreased, and thus take corresponding measures to ensure the exhaust gas purification effect.

[0060] The arrangement of upstream and downstream oxygen sensors 300 not only optimizes the combustion control of engine 10, but also provides effective monitoring of catalyst 200 performance, which can improve the reliability and emission control capabilities of engine 10 system to a certain extent.

[0061] It should be understood that the upstream side here refers to the side close to the exhaust port 11a of the engine 10 along the exhaust flow direction, that is, the position before the exhaust gas enters the catalytic converter 200; the downstream side refers to the side away from the exhaust port 11a of the engine 10 along the exhaust flow direction, that is, the position after the exhaust gas passes through the catalytic converter 200.

[0062] According to the second aspect of this disclosure, referring to Figure 1 An engine 10 is provided, including the exhaust manifold of the above embodiment. This engine 10 possesses all the beneficial effects of the exhaust manifold described above, which will not be elaborated further herein.

[0063] In some embodiments, the system further includes a cylinder body 11, with the pipe body 100 integrally disposed within the cylinder body 11, meaning the pipe body 100 directly becomes part of the cylinder body 11, forming an integral structure. In this arrangement, after exhaust gas is discharged from the combustion chamber, it can enter the catalyst 200 within the pipe body 100 via a shorter path, allowing the exhaust gas to contact the catalyst earlier, thereby helping to maintain a higher catalytic reaction temperature and improve the conversion efficiency of pollutants.

[0064] By integrating the pipe body 100 with the cylinder block 11, the overall space occupied by the engine 10 and the catalyst 200 can be reduced to a certain extent, making the front compartment layout of the engine 10 more compact, while reducing the complexity of component assembly and the cumbersomeness of the manufacturing process.

[0065] In addition, the integrated layout can reduce heat loss caused by the pipe body 100 interface and flange connection during exhaust gas flow, so that the exhaust temperature is kept at a relatively high level when entering the catalyst 200, which is beneficial to improving the conversion efficiency of hydrocarbons (CH), carbon monoxide (CO) and nitrogen oxides (NOx) in the exhaust gas and achieving a more ideal exhaust gas purification effect.

[0066] In some embodiments, the pipe body 100 is detachably connected to the cylinder block 11. That is, the pipe body 100 can be connected to or disconnected from the cylinder block 11 by means of bolts, clamps, or flanges. This arrangement is beneficial for the maintenance and repair of the engine 10 and the exhaust system. When it is necessary to replace or clean the catalytic converter 200, the pipe body 100 can be removed without disassembling the cylinder block 11, thereby simplifying the maintenance process and reducing maintenance costs to a certain extent.

[0067] Meanwhile, the detachable connection method provides flexibility in the manufacturing and assembly process, which is beneficial for the independent processing and inspection of the pipe body 100 and the cylinder body 11, thereby improving production efficiency to a certain extent. By rationally designing the connection structure and seals, exhaust gas leakage and heat loss at the connection can be reduced, allowing the exhaust gas to maintain a higher temperature before entering the catalyst 200, which is beneficial for improving the conversion efficiency of pollutants and optimizing the exhaust gas purification effect.

[0068] In some embodiments, the cylinder body 11 is provided with an exhaust port 11a, and the pipe body 100 is connected to the exhaust port 11a. There are multiple exhaust ports 11a, at least some of which are located at different positions in a first direction and at least some of which are located at different positions in a second direction, with the first direction and the second direction being perpendicular. This staggered arrangement is beneficial for guiding the exhaust gas from different exhaust ports 11a to the main exhaust pipe 120 through the exhaust branch pipe 110, thereby achieving the convergence and uniform distribution of exhaust gas.

[0069] For example, an engine 10 may include at least two exhaust manifolds 120, each exhaust manifold 120 connecting to at least two exhaust branch pipes 110. With this arrangement, exhaust flow can enter the exhaust manifolds 120 evenly along multiple branches, shortening the path of exhaust gas from the combustion chamber to the catalytic converter 200, reducing heat loss to a certain extent, and maintaining the temperature of exhaust gas entering the catalytic converter 200 at a higher level, thereby helping to improve pollutant conversion efficiency and optimize exhaust gas purification effect.

[0070] Meanwhile, the staggered arrangement of the exhaust ports 11a and the branch pipe arrangement can reduce the spatial conflict inside the exhaust system to a certain extent, making the front compartment layout of the engine 10 more compact, and facilitating the assembly and maintenance of the pipe body 100 and the cylinder block 11.

[0071] Reference Figure 1As shown, the first direction is perpendicular to the paper, and the second direction is horizontal from left to right.

[0072] This application shortens the distance between exhaust gas and catalyst by arranging the catalyst carrier 210 within a pipe, allowing heat from the engine 10 to be transferred to the catalyst more quickly. This facilitates rapid heating of the catalyst 200, enhancing its catalytic performance and reducing the amount of precious metals required, thus achieving cost reduction and efficiency improvement. Furthermore, the integrated structure of the catalyst 200 and engine 10 simplifies manufacturing and assembly processes, reduces production steps, improves production efficiency, and lowers production time and costs to some extent. In addition, the compact arrangement of the engine 10 and catalyst 200 reduces the overall space occupied by the exhaust system, providing more room for other components, thereby optimizing the overall vehicle front compartment layout and facilitating system integration.

[0073] According to a third aspect of this disclosure, a vehicle is provided that includes the exhaust manifold of the above embodiments, or includes the engine 10 of the above embodiments. The vehicle has all the beneficial effects of the exhaust manifold or engine 10 described above, which will not be elaborated further herein.

[0074] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this disclosure does not make any specific restrictions.

[0075] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0076] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0077] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0078] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An exhaust manifold, characterized in that, include: Tube body (100); and A catalyst (200) is disposed inside the tube body (100). The catalyst (200) includes a carrier (210) and a liner (220). The carrier (210) is located inside the tube body (100), and the liner (220) is disposed between the carrier (210) and the tube body (100).

2. The exhaust manifold according to claim 1, characterized in that, The catalyst (200) includes a housing, which is part of the tube (100).

3. The exhaust manifold according to claim 1, characterized in that, The carrier (210) includes a plurality of channels (230), the inner walls of which are coated with a catalyst coating.

4. The exhaust manifold according to claim 1, characterized in that, The carrier (210) is made of metal and / or ceramic.

5. The exhaust manifold according to claim 1, characterized in that, The gasket (220) is made of ceramic.

6. The exhaust manifold according to any one of claims 1 to 5, characterized in that, The pipe body (100) includes a plurality of exhaust branch pipes (110), and at least one of the exhaust branch pipes (110) is provided with the catalyst (200).

7. The exhaust manifold according to claim 6, characterized in that, The catalyst (200) and the exhaust manifold (110) are respectively configured in a one-to-one correspondence.

8. The exhaust manifold according to any one of claims 1 to 5, characterized in that, The pipe body (100) includes an exhaust branch pipe (110) and an exhaust main pipe (120), at least two of the exhaust branch pipes (110) are connected to one of the exhaust main pipes (120), and the catalyst (200) is disposed inside the exhaust main pipe (120).

9. The exhaust manifold according to any one of claims 1 to 5, characterized in that, It also includes an oxygen sensor (300) disposed inside the tube body (100).

10. The exhaust manifold according to claim 9, characterized in that, The number of oxygen sensors (300) is at least two. Along the exhaust direction of the pipe body (100), at least one oxygen sensor (300) is located on the upstream side of the catalyst (200), and at least another oxygen sensor (300) is located on the downstream side of the catalyst (200).

11. An engine (10), characterized in that, Includes the exhaust manifold as described in any one of claims 1 to 10.

12. The engine (10) according to claim 11, characterized in that, It also includes a cylinder body (11), wherein the tube body (100) is integrally disposed on the cylinder body (11); or, The tube body (100) is detachably connected to the cylinder body (11).

13. A vehicle, characterized in that, Includes the exhaust manifold as described in any one of claims 1 to 10, or includes the engine (10) as described in claim 11 or 12.

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