A catalyst aging-resistant structure and automobile

Abstract

This invention provides a catalyst aging-resistant structure and an automobile. The catalyst aging-resistant structure is applied to an automobile and includes: a catalyst for purifying automobile exhaust gas; a Venturi assembly for directing high-speed jet gas to the surface of the catalyst; and a control device connected to the Venturi assembly. When the temperature of the catalyst is higher than a set temperature, the control device controls the Venturi assembly to open; when the temperature of the catalyst is lower than the set temperature, the control device controls the Venturi assembly to close.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts technology, and more specifically, relates to a catalyst aging-resistant structure and an automobile. Background Technology

[0002] The core component of an automotive exhaust catalytic converter is the catalyst. Its working principle utilizes the residual oxygen in the exhaust gas and the high temperature of the exhaust to initiate an oxidation-reduction reaction on the catalyst surface, converting harmful substances such as Co, hydrocarbons (HC), and NOx into non-toxic CO2, H2O, and nitrogen, thereby reducing environmental pollution. Currently, the active component of most automotive exhaust purification catalysts is a precious metal, such as Mi-Pt, Rh-Pd, and Rh-Pt-Pd combinations, which are the most common active components in automotive exhaust purification catalysts. However, the poor aging resistance of these catalysts increases the production cost of automobiles. Summary of the Invention

[0003] In view of this, the present invention provides a catalyst aging-resistant structure and an automobile to solve the technical problem of how to reduce the aging risk of catalysts.

[0004] The technical solution of this invention is implemented as follows:

[0005] This invention provides a catalyst aging-resistant structure for use in automobiles, the catalyst aging-resistant structure comprising:

[0006] Catalytic converters are used to purify automobile exhaust.

[0007] A venturi assembly for directing a high-speed jet of gas to the surface of the catalyst;

[0008] A control device, connected to the Venturi assembly, controls the Venturi assembly to open when the temperature of the catalyst is higher than a set temperature, and controls the Venturi assembly to close when the temperature of the catalyst is lower than the set temperature.

[0009] In some embodiments, the venturi assembly includes an inlet pipe, a switching valve, and a venturi tube; the inlet pipe extends along the longitudinal direction of the vehicle, and one end of the inlet pipe is used to introduce outside air; the switching valve connects the other end of the inlet pipe and the inlet section of the venturi tube.

[0010] The control device is used to control the opening and closing of the switching valve according to the temperature of the catalyst.

[0011] In some embodiments, the Venturi component further includes:

[0012] The outlet pipe is connected at one end to the outlet section of the venturi tube and at the other end to the catalyst.

[0013] In some embodiments, the catalyst aging-resistant structure further includes:

[0014] The hood has an internal cavity, the catalyst is disposed in the cavity, the cavity extends through the front and rear of the vehicle, and the outlet section of the venturi tube is connected to the cavity.

[0015] In some embodiments, the cover is provided with a jet inlet and a jet outlet, both of which are in communication with the receiving cavity, and the jet inlet is connected to the other end of the outlet pipe.

[0016] In some embodiments, the jet inlet is located at the upper end of the catalyst.

[0017] In some embodiments, the outlet pipe extends at least partially perpendicular to the top surface of the catalyst.

[0018] In some embodiments, the jet outlet is located at the lower end of the catalyst.

[0019] In some embodiments, the catalyst aging-resistant structure further includes:

[0020] A temperature detection device is used to continuously detect the real-time temperature of the catalyst.

[0021] The control device is used to control the opening and closing of the Venturi assembly based on the real-time temperature.

[0022] This invention provides a car, comprising:

[0023] The catalyst aging-resistant structure according to any of the above.

[0024] This invention provides a catalyst aging-resistant structure and an automobile. The catalyst aging-resistant structure, applied to an automobile, includes a catalyst, a Venturi assembly, and a control device. The catalyst is used to purify automobile exhaust, the Venturi assembly is used to direct high-speed jet gas to the surface of the catalyst, and the control device is connected to the Venturi assembly. When the catalyst temperature reaches a set high temperature, the control device controls the Venturi assembly to open; when the catalyst temperature is lower than the set temperature, the control device controls the Venturi assembly to close. This invention, by guiding high-speed jet air to the catalyst surface through the Venturi assembly, improves the air velocity flowing across the catalyst surface and increases the contact area between the air and the catalyst, thereby improving the efficiency of heat dissipation from the catalyst within the catalyst in a short time, reducing the catalyst bed temperature, slowing down the catalyst aging process, and extending the catalyst's service life. Furthermore, this invention, through the control device controlling the opening and closing of the Venturi assembly in real time according to the catalyst temperature, achieves timely heat dissipation from the catalyst while reducing wear on the Venturi assembly, further extending the service life of the catalyst aging-resistant structure and thus extending the service life of the catalyst. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the catalyst aging-resistant structure according to an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Catalyst; 2. Venturi assembly; 21. Inlet pipe; 22. Switch valve; 23. Venturi tube; 231. Inlet section; 232. Throat; 233. Outlet section; 234. Inlet; 24. Outlet pipe; 3. Control device; 4. Cover; 41. Receptacle; 42. Jet inlet; 43. Jet outlet. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this invention will not be described separately.

[0030] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0031] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0032] As people's environmental awareness gradually increases and calls for environmental protection grow louder, vehicle emission control, as a major source of pollution, has become a key focus. Various countries and regions are successively tightening emission regulations. China will fully implement the China VI b (RDE) emission standard on July 1, 2023. Emission control, especially the development of after-treatment systems, has become a crucial part of meeting vehicle emission regulations. RDE 6b requires vehicles to have a service life of 200,000 kilometers. This means that not only new cars must meet the emission regulations regarding gaseous and PM / PN pollutants, but cars that have traveled 200,000 kilometers still need to meet this requirement. During development, conducting 200,000 kilometers of SRC standard road cycles to confirm aging performance presents significant challenges to the vehicle development cycle (approximately 10 months) and cost (conservatively 2.5 million RMB). Currently, the common practice is to use the Standard Bench Cycle (SBC) specified in GB18352 to replace SRC in the production of aging catalysts. SBC is a cycle based on the equivalent thermal aging principle of the Arrhenius equation. First, the catalyst bed temperature is collected for at least 3 SRC cycles (42 km per cycle). Then, the aging time is calculated using the collected bed temperature according to the BAT equation below.

[0033] SBC bench aging thermodynamics BAT equation

[0034] t e =e (R / Tr-R / Tv)

[0035] Where:

[0036] t e —Aging time

[0037] e—natural logarithm ≈ 2.718

[0038] R—the thermal reactivity coefficient of the catalyst, with a recommended value of 17500. It can also be determined experimentally by referring to Appendix GA.4 of GB18352.6-2016.

[0039] Tr - The effective reference temperature of the catalyst during bench aging cycles on a catalyst test bench. K - The effective temperature is a constant temperature that can produce the same aging effect as the catalyst subjected to different temperatures during bench aging cycles.

[0040] Tv—The midpoint temperature of the temperature box in the automotive catalytic converter temperature histogram.

[0041] As can be seen from the above formula, under the same Tr condition, the smaller the Tv value, the longer the aging time t will be. e The shorter the distance, the less heat the catalyst receives, resulting in less aging. For the same mileage requirement, fewer precious metals are needed to meet emission regulations.

[0042] Based on the above, this invention will use the measured temperature of the catalyst as a reference. When the catalyst bed temperature is higher than the set value, the Venturi assembly will open and use the high-speed Venturi jet to cool the catalyst, thereby reducing the engine bed temperature (Tv) and ultimately slowing down the aging of the catalyst during the 200,000-kilometer durability mileage.

[0043] This invention provides a catalyst aging-resistant structure to solve the technical problem of how to reduce the temperature of the catalyst, such as... Figure 1 As shown, this catalyst aging-resistant structure is applied to automobiles. The catalyst aging-resistant structure includes a catalyst 1, a Venturi assembly 2, and a control device 3. The catalyst 1 contains a catalyst used to purify automobile exhaust. At high temperatures, the catalyst ages more, while at low temperatures, the aging process decreases. In this embodiment, the Venturi assembly 2 is used to direct a high-speed jet of gas to the surface of the catalyst. That is, during vehicle operation, the Venturi assembly utilizes externally flowing air, converting it into a high-speed jet of air. High-speed jet air refers to air whose velocity and pressure are both increased. The Venturi assembly 2 directs this high-speed jet of air to the catalyst surface for heat exchange, achieving efficient heat dissipation for the catalyst.

[0044] In embodiments of the present invention, such as Figure 1As shown, the control device 3 is connected to the Venturi assembly 2, and the control device 3 is used to control the opening and closing of the Venturi assembly 2. That is, when the temperature of the catalyst 1 is higher than the set temperature, the control device 3 controls the Venturi assembly 2 to open, so as to conduct high-speed jet air to the catalyst 1. When the temperature of the catalyst is lower than the set temperature, the control device 3 controls the Venturi assembly 2 to close, so as to prevent the Venturi assembly 2 from conducting high-speed jet air to the catalyst 1. It should be noted that the specific value of the set temperature is not limited in this embodiment of the invention, and the set temperature can be set according to the aging time specified in the emission regulations. In this embodiment of the invention, the control device 3 controls the opening and closing of the Venturi assembly 2 to further control whether high-speed jet air is conducted to the catalyst surface. When the catalyst surface temperature is high, the Venturi assembly can be opened to achieve real-time cooling of the catalyst surface. When the catalyst surface temperature is low, the Venturi assembly can be closed to reduce the wear and tear on the Venturi assembly and help extend the service life of the Venturi assembly.

[0045] This invention provides a catalyst aging-resistant structure for automotive applications. The structure includes a catalyst, a Venturi assembly, and a control device. The catalyst aging-resistant structure purifies automotive exhaust gases, the Venturi assembly directs a high-speed jet of gas to the catalyst surface, and the control device is connected to the Venturi assembly. When the catalyst temperature exceeds a set temperature, the control device opens the Venturi assembly; when the catalyst temperature falls below the set temperature, the control device closes the Venturi assembly. This invention, by directing a high-speed jet of air to the catalyst surface through the Venturi assembly, increases the air velocity across the catalyst surface and expands the contact area between the air and the catalyst. This improves the efficiency of heat dissipation from the catalyst within the catalyst in a short time, reduces the catalyst bed temperature, slows down the catalyst aging process, and extends the catalyst's lifespan. Furthermore, this invention, through the control device's real-time control of the Venturi assembly's opening and closing based on the catalyst temperature, achieves timely heat dissipation from the catalyst while reducing wear on the Venturi assembly, further extending the lifespan of the catalyst aging-resistant structure and thus the overall lifespan of the catalyst.

[0046] In some embodiments, as Figure 1 As shown, the Venturi assembly 2 includes an inlet pipe 21, a switching valve 22, and a Venturi tube 23. During vehicle operation, air flowing through the vehicle can enter the Venturi tube 23 from the inlet pipe 21. The switching valve 22 opens and closes the airflow between the inlet pipe 21 and the Venturi tube 23, in conjunction with... Figure 1As shown, the direction of the dashed arrow indicates the direction of gas flow. When the switch valve 22 is open, gas can flow from the inlet pipe 21 to the venturi tube 23. The venturi tube 23 includes an inlet section 231, a throat 232, and an outlet section 233 connected in sequence. The cross-sectional area of ​​the throat 232 is smaller than that of the inlet section 231 and the outlet section 233. The venturi tube 23 is also provided with an intake port 234, which is located at the end of the outlet section 233 near the throat 232. The intake port 234 connects the inner and outer sides of the venturi tube 23.

[0047] The following combination Figure 1 The working principle of the venturi tube in this embodiment of the invention will be explained as follows:

[0048] During vehicle operation, gas flows from inlet section 231 into venturi tube 23. The gas in venturi tube 23 flows to throat 232, where the channel area decreases. According to fluid mechanics principles, a smaller channel leads to lower gas pressure and higher gas velocity. Therefore, a negative pressure is created at inlet 234, attracting gas from outside inlet 234 to flow rapidly to outlet section 233, resulting in a strong airflow with high velocity at outlet section 233 of venturi tube 23. This embodiment of the invention guides the high-speed jet of cold air from the venturi tube to the surface of the catalyst 1, increasing the amount of gas flowing across the catalyst surface per unit time, thereby improving the catalyst's heat dissipation efficiency and reducing catalyst aging.

[0049] like Figure 1 As shown, in this embodiment of the invention, the inlet pipe 21 extends along the front-rear direction of the vehicle (the direction indicated by the solid arrow is the direction the vehicle is traveling), that is, the inlet pipe 21 faces the windward direction of the vehicle's travel. Figure 1 The solid arrow indicates the direction of the car's travel, while the dashed arrow indicates the direction of gas flow. In other words, the gas flow direction and the car's travel direction are opposite, respectively. In this embodiment of the invention, extending the inlet pipe 21 along the front-rear direction of the car increases the efficiency of gas entering the inlet pipe 21, thereby further increasing the heat dissipation efficiency of the catalytic converter.

[0050] like Figure 1As shown, one end of the inlet pipe 21 is used to introduce external air into the venturi tube 23; the switching valve 22 connects the other end of the inlet pipe 21 and the inlet section 231 of the venturi tube 23; the control device 3 is used to control the opening and closing of the switching valve 22 according to the temperature of the catalyst 1. In other words, the opening and closing of the switching valve 22 can control the operation of the venturi tube 23. When the switching valve 22 is open, the venturi tube 23 operates; when the switching valve 22 is closed, the venturi tube 23 stops operating. The control device 3 can control the opening and closing of the switching valve 22, meaning that the operation of the venturi tube 23 can be further controlled through the control device 3. In this embodiment of the invention, the Venturi tube 23 is controlled by temperature detection. When the temperature is higher than a set value, it indicates that the catalyst 1 is operating at a high temperature. The control device 3 controls the opening of the switching valve 22, allowing cooling air to enter the Venturi tube 23 through the inlet pipe 21. After being transformed into a jet of cooling air by the Venturi tube 23, the air is sprayed onto the surface of the catalyst 6 to remove heat from the catalyst 1 and reduce the maximum temperature of the catalyst 6. This slows down the aging process of the catalyst and increases its service life. When the temperature is lower than the set value, it indicates that the catalyst 1 is not operating at a high temperature. The control device 3 controls the closing of the switching valve 22, preventing air from entering the Venturi tube and further controlling the cooling of the catalyst by the Venturi tube.

[0051] In some embodiments, such as Figure 1 As shown, the Venturi assembly 2 also includes an outlet pipe 24. One end of the outlet pipe 24 is connected to the outlet section 233 of the Venturi tube. The high-speed jet air exiting the outlet section 233 is exited through the outlet pipe 24, and the other end of the outlet pipe 24 is close to the catalyst 1. By providing the outlet pipe 24, this embodiment of the invention helps reduce the difficulty of assembling the Venturi tube 23 and the catalyst 1 in terms of position. Furthermore, it ensures that the gas flow direction of the Venturi tube is consistent with the vehicle's driving direction, while also improving the gas flow efficiency exiting the outlet pipe to the catalyst surface. In some embodiments, the outlet pipe 24 is used to change the direction of gas exit, thereby increasing the area of ​​the exited high-speed jet gas flowing through the catalyst, further improving the heat dissipation efficiency of the catalyst.

[0052] In some embodiments, such as Figure 1As shown, the catalyst aging-resistant structure also includes a cover 4. The cover 4 has a receiving cavity 41 inside, and the catalyst 1 is disposed within the receiving cavity 41. The receiving cavity 41 extends through the front-rear direction of the vehicle. In this embodiment of the invention, by extending the receiving cavity through the front-rear direction of the vehicle, it facilitates guiding gas flow across the surface of the catalyst to achieve heat dissipation. The outlet section 233 of the Venturi tube 23 connects to the receiving cavity 41. The outlet section 233 can be directly connected to the receiving cavity 41, or it can be connected to the receiving cavity 41 through an outlet pipe 24. The Venturi tube guides the high-speed jet into the receiving cavity 41. The contour shape of the cover 4 guides the high-speed jet air, directing the gas to pass as far as possible across the outer surface of the catalyst, thereby increasing the contact area between the gas and the catalyst and improving the heat dissipation efficiency of the catalyst.

[0053] In some embodiments, such as Figure 1 As shown, the cover 4 is provided with a jet inlet 42 and a jet outlet 43. Both the jet inlet 42 and the jet outlet 43 are connected to the receiving cavity 41. The jet inlet 42 is connected to the other end of the outlet pipe 24. The jet inlet 42 is used to introduce high-speed jet gas into the receiving cavity 41. After the high-speed jet gas exchanges heat with the catalyst 1 in the receiving cavity 41, the heat from the catalyst 1 is discharged through the jet outlet 43. This embodiment of the invention, by providing a jet inlet and a jet outlet on the cover 4, helps to improve the flow efficiency of high-speed jet air on the catalyst surface, thereby further improving the gas's heat dissipation efficiency on the catalyst.

[0054] In some embodiments, such as Figure 1 As shown, the jet inlet 42 is located at the upper end of the catalyst 1. It should be noted that, in this embodiment, "upper end" refers to the area above the catalyst 1 when it is installed in the vehicle and the vehicle is in normal operating condition. In other words, the upper end of the catalyst 1 can be understood as the upper end of the catalyst in the absolute coordinate system during normal use. By placing the jet inlet 42 at the upper end of the catalyst and ensuring that the gas flow direction is perpendicular to the vehicle's direction of travel, this gas flow direction helps to increase the surface area flowing through the catalyst, thereby improving the heat dissipation efficiency of the catalyst.

[0055] In some embodiments, such as Figure 1As shown, at least a portion of the outlet pipe 24 extends perpendicularly to the top surface of the catalyst 1. It should be noted that the outlet pipe 24 in this embodiment is bendable. This outlet pipe 24 can both direct the high-speed jet gas from the Venturi tube to the catalyst surface and change its flow direction to adapt to the assembly position between the Venturi tube and the catalyst, thereby reducing assembly difficulty. The statement that at least a portion of the outlet pipe 24 extends perpendicularly to the surface of the catalyst 1 in this embodiment means that the outlet pipe 24 is bendable, but the flow direction of the gas exiting the outlet pipe 24 to the surface of the catalyst 1 is perpendicular to the top surface of the catalyst 1, where the top surface of the catalyst 1 refers to its upper surface in an absolute coordinate system. By making the gas exiting the outlet pipe perpendicular to the top surface of the catalyst, this embodiment of the invention extends the path of the gas flowing across the catalyst surface, thereby increasing the contact area between the high-speed jet gas and the catalyst, and thus improving the heat dissipation efficiency of the catalyst.

[0056] In some embodiments, as Figure 1 As shown, the jet outlet 43 is located at the lower end of the catalyst 1. With the jet inlet 42 located at the upper end of the catalyst 1, the jet inlet 42 and jet outlet 43 are respectively located at opposite ends of the catalyst 1. This opposite arrangement of the jet inlet 42 and jet outlet 43 guides the high-speed jet gas to flow across the surface of the catalyst 1 as much as possible, increasing the contact area between the gas and the catalyst 1, thereby improving the heat dissipation efficiency of the high-speed jet gas on the catalyst.

[0057] In some embodiments, the catalyst aging-resistant structure further includes a temperature detection device. The temperature detection device continuously monitors the real-time temperature of the catalyst 1. That is, the temperature detector in this embodiment can measure the temperature of the catalyst within the catalyst 1 in real time, setting a control threshold for the control device based on the catalyst's aging temperature. When the temperature detection device detects that the catalyst temperature is higher than the set value, it indicates that the catalyst is prone to aging at this temperature. In this case, the control device controls the opening and closing of the Venturi assembly based on the real-time temperature. In other words, the temperature detection device transmits the measured temperature data to the control device in real time. The control device determines whether the temperature is higher than the set value. If the temperature detection device detects that the catalyst temperature is higher than the set value, the control device controls the switching valve 22 to open, enabling the Venturi tube to operate, thereby cooling the catalyst and reducing the risk of catalyst aging. If the temperature detection device detects that the catalyst temperature is lower than the set value, the control device controls the switching valve to close, shutting off the Venturi tube's operation and thus stopping the cooling of the catalyst, reducing wear on the Venturi tube and extending its service life.

[0058] This invention uses the catalyst temperature as input and automatically controls the opening and closing of the Venturi tube to reduce the catalyst's maximum temperature. The process is automated and requires no manual intervention. The control device judges the cooling conditions in real time and automatically executes cooling operations to improve the catalyst's anti-aging performance. The Venturi tube requires no energy to cool the catalyst with a jet of cooling air, slowing down the catalyst's aging process and thus reducing the content of expensive precious metals in the catalyst, improving the economic efficiency of automobile production.

[0059] Furthermore, the catalyst aging-resistant structure in this embodiment of the invention continuously and in real-time judges the operating status of the cooling mechanism based on the catalyst temperature input. This improves the catalyst's anti-aging performance and enhances the vehicle's market competitiveness without requiring large-scale vehicle modifications or increasing the precious metal content of the catalyst.

[0060] This invention provides an automobile comprising a catalyst aging-resistant structure according to any of the above embodiments. The catalyst aging-resistant structure includes a catalyst, a Venturi assembly, and a control device. The catalyst is used to purify automobile exhaust gases, the Venturi assembly is used to direct a high-speed jet of gas to the surface of the catalyst, and the control device is connected to the Venturi assembly. When the catalyst temperature is higher than a set temperature, the control device controls the Venturi assembly to open; when the catalyst temperature is lower than the set temperature, the control device controls the Venturi assembly to close. This invention, by guiding a high-speed jet of air to the catalyst surface through the Venturi assembly, improves the air velocity flowing across the catalyst surface and increases the contact area between the air and the catalyst, thereby improving the efficiency of heat dissipation from the catalyst within the catalyst in a short time, reducing the catalyst bed temperature, slowing down the catalyst aging process, and extending the catalyst's service life. Furthermore, this invention, by controlling the opening and closing of the Venturi assembly in real time according to the catalyst temperature, achieves timely heat dissipation from the catalyst and reduces wear on the Venturi assembly, further extending the service life of the catalyst aging-resistant structure and thus further extending the service life of the catalyst.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A catalyst aging-resistant structure, characterized in that, The catalyst aging-resistant structure is used in automobiles, and the catalyst aging-resistant structure includes: Catalytic converters are used to purify automobile exhaust. A venturi assembly for directing a high-speed jet of gas to the surface of the catalyst; A control device, connected to the Venturi assembly, controls the Venturi assembly to open when the temperature of the catalyst is higher than a set temperature; and controls the Venturi assembly to close when the temperature of the catalyst is lower than the set temperature. The venturi assembly includes an inlet pipe, a switching valve, and a venturi tube; the inlet pipe extends along the longitudinal direction of the vehicle and faces the windward direction of the vehicle's travel, with one end of the inlet pipe used to introduce external air; the switching valve connects the other end of the inlet pipe to the inlet section of the venturi tube. The control device is used to control the opening and closing of the switching valve according to the temperature of the catalyst; The Venturi component also includes: The outlet pipe is connected at one end to the outlet section of the venturi tube and at the other end to the catalyst.

2. The catalyst aging-resistant structure according to claim 1, characterized in that, The catalyst's aging-resistant structure also includes: The hood has an internal cavity, the catalyst is disposed in the cavity, the cavity extends through the front and rear of the vehicle, and the outlet section of the venturi tube is connected to the cavity.

3. The catalyst aging-resistant structure according to claim 2, characterized in that, The cover is provided with a jet inlet and a jet outlet, both of which are connected to the receiving cavity, and the jet inlet is connected to the other end of the outlet pipe.

4. The catalyst aging-resistant structure according to claim 3, characterized in that, The jet inlet is located at the upper end of the catalyst.

5. The catalyst aging-resistant structure according to claim 4, characterized in that, The outlet pipe extends at least partially perpendicular to the top surface of the catalyst.

6. The catalyst aging-resistant structure according to claim 4, characterized in that, The jet outlet is located at the lower end of the catalyst.

7. The catalyst aging-resistant structure according to any one of claims 1-6, characterized in that, The catalyst's aging-resistant structure also includes: A temperature detection device is used to continuously detect the real-time temperature of the catalyst. The control device is used to control the opening and closing of the Venturi assembly based on the real-time temperature.

8. A car, characterized in that, include: The catalyst aging-resistant structure according to any one of claims 1-7.

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