Regeneration system and vehicle

Abstract

The application relates to the technical field of vehicle exhaust systems, and provides a regeneration system and a vehicle. The regeneration system comprises a particle trap and a regeneration device. The particle trap comprises a treatment unit for treating exhaust gas in an exhaust system, and an air inlet pipe located upstream of the treatment unit along the flow direction of the airflow in the exhaust system. The regeneration device comprises a shell surrounding the air inlet pipe to form a cavity, and a carbon tank in communication with the cavity through a communication pipe. The cavity is in communication with the passage in the air inlet pipe. The oil gas in the carbon tank can enter the air inlet pipe through the communication pipe and the cavity, and flow through the treatment unit along with the airflow in the air inlet pipe. In the regeneration system, the oil gas in the carbon tank can flow through the treatment unit along with the airflow in the air inlet pipe, so that a high-temperature environment is generated in the particle trap, thereby triggering a particle combustion chain reaction. The regeneration mode can eliminate the dependence of active regeneration on external functions, thereby improving the low-speed regeneration efficiency and fuel economy.

Description

Technical Field

[0001] This application relates to the field of vehicle exhaust system technology, and particularly to a regeneration system. This application also relates to a vehicle using this regeneration system. Background Technology

[0002] Particulate filters are mainly used to capture and remove particulate matter from exhaust systems. After prolonged use, the accumulation of captured particulate matter can easily lead to overload. When the particulate filter is overloaded, a regeneration device is required to regenerate it.

[0003] Existing active regeneration devices generally require an additional fuel supply and also need to utilize the high temperature of the engine under high load conditions or the burner to ignite the fuel. Such regeneration methods are highly dependent on external power sources such as engine operating conditions, or require fuel atomization devices, ignition devices, etc., resulting in a complex structure. Utility Model Content

[0004] In view of this, this application aims to propose a regeneration system that can achieve better regeneration results.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows: A regeneration system includes a particulate trap and a regeneration device capable of regenerating the particulate trap. The particulate filter includes a treatment unit for treating exhaust gas in the exhaust system, and an intake pipe located upstream of the treatment unit along the airflow direction within the exhaust system. The regeneration device includes a housing that forms a cavity with the air inlet pipe, and a carbon canister that communicates with the cavity through a connecting pipe, the cavity being connected to a channel inside the air inlet pipe; The oil and gas in the carbon canister can enter the air inlet pipe through the connecting pipe and the cavity, and then flow through the processing unit with the airflow in the air inlet pipe.

[0006] Furthermore, the cross-sectional area of ​​the air intake pipe is smaller than the cross-sectional area of ​​the particulate trap.

[0007] Furthermore, it also includes a catalytic converter connected to the particulate filter via the intake pipe, wherein the cross-sectional area of ​​the intake pipe is smaller than the cross-sectional area of ​​the catalytic converter.

[0008] Furthermore, the cavity is annular and arranged circumferentially around the air intake pipe.

[0009] Furthermore, the air intake pipe is provided with multiple rows of openings, and the cavity is connected to the channel inside the air intake pipe through the multiple rows of openings; The multiple rows of openings are arranged at intervals along the axial direction of the air intake pipe, and each row of openings includes multiple openings, which are arranged at intervals around the circumference of the air intake pipe.

[0010] Furthermore, the cross-sectional area of ​​the connecting pipe is smaller than the cross-sectional area of ​​the intake pipe; and / or, The angle between the axial direction of the portion of the connecting pipe near the air intake pipe and the axial direction of the air intake pipe is between 30° and 60°.

[0011] Furthermore, the connecting pipe is equipped with a one-way valve, which can control the oil and gas flowing through the connecting pipe to flow unidirectionally into the cavity.

[0012] Furthermore, the outlet of the particle collector is provided with a connecting pipe, which connects the particle collector to the silencer, and the connecting pipe is made of a flexible material.

[0013] Furthermore, the oil / gas inlet of the carbon canister is connected to the evaporation outlet of the oil tank; and / or, A carbon canister air filter is connected to the air inlet of the carbon canister.

[0014] Compared with related technologies, this application has the following advantages: (1) The regeneration system described in this application forms a cavity by enclosing the shell and the intake pipe, and connects the cavity to the channel in the intake pipe. The cavity is also connected to the carbon canister through a connecting pipe, so that the oil and gas in the carbon canister can enter the intake pipe through the connecting pipe and the cavity, and flow through the processing unit with the airflow in the intake pipe. An oxidation-reduction reaction can occur, which increases the temperature in the particulate filter, thereby triggering a particulate combustion chain reaction. This regeneration method can eliminate the dependence of active regeneration on external functions, improve fuel economy, and improve low-speed regeneration efficiency, thereby achieving a better regeneration effect.

[0015] (2) When the cross-sectional area of ​​the inlet pipe is smaller than that of the particulate trap, the airflow velocity in the inlet pipe will be increased to a certain extent due to the sudden increase in the flow area during the process of the gas entering the particulate trap from the inlet pipe. The higher airflow velocity can give the gas entering the particulate trap a certain initial kinetic energy, which is conducive to better diffusion and distribution of the gas inside the trap. It can ensure that the gas is in full contact with the filter structure of the trap, thereby improving the efficiency of particulate trapping.

[0016] (3) The cross-sectional area of ​​the inlet pipe is smaller than that of the catalytic converter. When the gas enters the inlet pipe from the catalytic converter, the flow velocity in the inlet pipe is relatively high. Since the cross-sectional area of ​​the inlet pipe is smaller than that of the particulate filter, the cross-sectional area of ​​the inlet pipe is smaller and the flow velocity will increase as the gas flows from the catalytic converter through the inlet pipe into the particulate filter. This airflow state of first concentrating and then dispersing can make the gas fully fill the internal space of the catalytic converter and the particulate filter, thereby improving the utilization rate of the catalyst in the catalytic converter and the efficiency of the particulate filter in capturing particles.

[0017] (4) The cavity is annular and arranged around the circumference of the intake pipe, so that the central axis of the cavity coincides with or is parallel to the central axis of the intake pipe. This annular structure allows the cavity to be evenly distributed around the intake pipe in space, forming a continuous and closed annular space. The cavity completely wraps around or surrounds the intake pipe along the circumference of the intake pipe without any gaps or interruptions. This arrangement can make full use of the annular space around the intake pipe, so that the oil and gas in the carbon canister can be fully mixed before entering the intake pipe.

[0018] (5) Multiple rows of openings are provided on the air inlet pipe. The multiple rows of openings are arranged at intervals along the axial direction of the air inlet pipe. Each row of openings includes multiple openings. The multiple openings in each row are arranged at intervals around the circumference of the air inlet pipe, so that the oil and gas in the cavity can enter the air inlet pipe through multiple openings, thereby making the oil and gas evenly mixed with the airflow in the air inlet pipe, which is conducive to improving the efficiency of subsequent regeneration of the particle collector.

[0019] (6) The small cross-sectional area of ​​the connecting pipe will limit the flow rate of the system to a certain extent. Since the flow capacity of the connecting pipe is relatively small, it can limit the rate at which oil and gas in the carbon canister enter the cavity. On the other hand, since the smaller cross-sectional area is more sensitive to pressure changes, the pressure difference between the two ends of the connecting pipe can drive the oil and gas in the carbon canister into the cavity of the shell. Limiting the angle between the axial direction of the connecting pipe near the inlet pipe and the axial direction of the inlet pipe can adjust the fluid direction, reduce flow resistance, and at the same time help to enhance the mixing effect of oil and gas with the airflow in the inlet pipe.

[0020] (7) A one-way valve is installed on the connecting pipe. The one-way valve can control the oil and gas flowing through the connecting pipe to flow unidirectionally into the cavity, and can better prevent the airflow in the intake pipe from flowing back to the connecting pipe, thus maintaining the pressure stability in the exhaust system.

[0021] (8) The connecting pipe at the outlet of the particulate filter can connect the particulate filter to the muffler. The connecting pipe is made of flexible material, which can decouple the exhaust path. The flexible connecting pipe can disconnect the engine vibration, which can better prevent the engine vibration energy from being transmitted to the vehicle body or frame, thereby reducing the occurrence of the rumbling problem inside the vehicle.

[0022] (9) The oil and gas inlet of the carbon canister is connected to the evaporation outlet of the fuel tank, allowing the regeneration system to utilize the carbon canister that is matched to the fuel tank on the vehicle. This allows for the use of existing parts on the vehicle, thereby reducing the weight and cost of the regeneration system. The air inlet of the carbon canister is connected to a carbon canister air filter, which can ensure that fresh air enters the carbon canister, extend the service life of the carbon canister, reduce the frequency of carbon canister replacement, and lower maintenance costs.

[0023] Another object of this application is to provide a vehicle equipped with the regeneration system described above.

[0024] The vehicle described in this application, by applying the above-mentioned regeneration system, can generate a high-temperature environment inside the particulate filter when the oil and gas flow into the particulate filter through the intake manifold, thereby triggering a particulate combustion chain reaction. This regeneration method can eliminate the dependence of active regeneration on external functions, improve fuel economy, and also improve low-speed regeneration efficiency, thus achieving a better regeneration effect. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a structural block diagram of the regeneration system under the application state described in the embodiments of this application; Figure 2 This is a schematic diagram of the regeneration system described in the embodiments of this application; Figure 3 for Figure 2 A structural diagram from another perspective; Figure 4 For along Figure 3 Cross-sectional view of line AA; Figure 5 This is a schematic diagram of the intake pipe structure described in an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures: 1. Particle trap; 101. Second housing; 102. Processing unit; 103. Inlet pipe; 1031. Opening; 104. Second inlet cone; 105. Second outlet cone; 106. Outlet pipe; 107. Connecting pipe; 108. Outlet flange; 109. Second gasket; 2. Shell; 201. Cavity; 3. Carbon canister; 4. Connecting pipe; 5. Catalytic converter; 501. Inlet flange; 502. First inlet cone; 503. First after-treatment purification unit; 504. Heat shield; 505. First outlet cone; 506. Catalytic converter support assembly; 507. First housing; 508. First gasket; 6. Fuel tank; 7. Carbon canister air filter; 8. Air filter; 9. Turbocharger; 901. Compressor; 902. Turbine; 10. Intercooler radiator; 11. Engine module; 12. Muffler. Detailed Implementation

[0027] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0029] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0031] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0033] An embodiment of the first aspect of this application provides a regeneration system that, by improving its own components and structure, can eliminate the dependence of active regeneration on external functions, thereby improving low-speed regeneration efficiency and fuel economy.

[0034] In related technologies, with the advancement and development of science and technology, the requirements for exhaust emissions of hybrid vehicles are becoming increasingly stringent, and vehicles generally need to add particulate filters to filter particulate matter in the exhaust.

[0035] Particulate filters include GPF (Gasoline Particulate Filter) and DPF (Diesel Particulate Filter). Particulate filters are primarily used to capture and remove particulate matter from exhaust systems. During operation, particulate matter in the exhaust gas accumulates and remains on the porous media wall of the filter element, thus capturing and filtering the particulate matter. Over time, the captured particulate matter continuously accumulates.

[0036] To ensure the filtration capacity of the particulate filter, it is currently common practice to monitor whether the particulate filter is overloaded in real time. When an overload is detected, a regeneration device is required to regenerate the particulate filter.

[0037] Existing active regeneration devices face regeneration difficulties, generally requiring an additional fuel supply. They also need to utilize the high temperature of the engine under high load conditions or the burner to ignite the fuel. Such regeneration methods are highly dependent on external power sources such as engine operating conditions, or require fuel atomization devices, ignition devices, etc., resulting in complex structures.

[0038] In view of this, in order to overcome the shortcomings of related technologies, the regeneration system of this embodiment combines... Figures 1 to 3 As shown, the overall design includes a particle trap 1 and a regeneration device capable of regenerating the particle trap 1.

[0039] The particulate filter 1 includes a treatment unit 102 for treating exhaust gas in the exhaust system, and an intake pipe 103 located upstream of the treatment unit 102 along the airflow direction within the exhaust system. The regeneration device includes a housing 2 that forms a cavity 201 with the intake pipe 103, and a carbon canister 3 that communicates with the cavity 201 through a connecting pipe 4. The cavity 201 communicates with a channel within the intake pipe 103.

[0040] It should be noted that, in a preferred example, the carbon canister 3 mentioned above is the existing carbon canister 3 on the vehicle. The carbon canister 3 is a core component of the vehicle's fuel evaporative emission control system. Its core function is to achieve multiple effects such as environmental protection, energy saving and pressure balance of the fuel tank 6 by adsorbing fuel vapor through activated carbon.

[0041] like Figures 2 to 4 As shown, the particulate filter 1 includes a second aftertreatment assembly, which specifically includes a second housing 101, a treatment unit 102 disposed within the second housing 101, and a second gasket 109. To distinguish it from the first aftertreatment purification unit 503 described below, the treatment unit 102 of the particulate filter 1 is referred to here as the second aftertreatment purification unit. The second aftertreatment purification unit is mainly used to adsorb carbon particulate matter in exhaust gas, and it is coated with a catalyst that can oxidize the fuel vapor mixture.

[0042] One end of the second housing 101 is provided with a second air inlet cone 104, and the inlet of the second air inlet cone 104 is connected to the outlet of the first air outlet cone 505 through an air inlet pipe 103. The other end of the second housing 101 is connected in sequence to the second air outlet cone 105, the air outlet pipe 106, the connecting pipe 107 and the air outlet flange 108, which is used to connect to the muffler 12.

[0043] When this regeneration system is applied to a vehicle, because an intake pipe 103 with a small cross-sectional area is provided between the first exhaust cone 505 and the second intake cone 104, the exhaust gas flow path narrows at the intake pipe 103. The exhaust gas flow velocity in the intake pipe 103 increases, forming a negative pressure effect. The Venturi negative pressure effect can be used to eject the fuel and air mixture in the annular cavity 201 to form oil and gas.

[0044] Specifically, due to the negative pressure effect, external air can enter the carbon canister 3 through the carbon canister air filter 3. The air can carry away the fuel vapor adsorbed by the carbon canister 3 and form a mixture of fuel vapor and air. This mixture, i.e., oil and gas, can enter the annular cavity 201 through the one-way valve described below.

[0045] Oil and gas enter the intake pipe 103 through the opening and mix with the exhaust gas before entering the second after-treatment purification unit. The fuel vapor undergoes an oxidation reaction in the second after-treatment purification unit, which can raise the temperature of the second after-treatment purification unit to form a high-temperature environment. In addition, the mixed gas contains sufficient oxygen, which can trigger the combustion and regeneration of the soot particles adsorbed in the second after-treatment purification unit.

[0046] The regeneration system of this application constructs a cavity 201 by enclosing the housing 2 and the intake pipe 103, and connects the cavity 201 with the channel inside the intake pipe 103. The cavity 201 is also connected to the carbon canister 3 through the connecting pipe 4, allowing the oil and gas in the carbon canister 3 to enter the intake pipe 103 through the connecting pipe 4 and the cavity 201. The oil and gas then flow through the processing unit 102 with the airflow in the intake pipe 103, creating a high-temperature environment inside the particulate filter 1, thereby triggering a particulate combustion chain reaction. This regeneration method can eliminate the dependence of active regeneration on external functions, thereby improving low-speed regeneration efficiency and fuel economy.

[0047] To ensure the exhaust performance of the exhaust system, in some exemplary embodiments, reference is made to... Figure 2 and Figure 3 As shown, the cross-sectional area of ​​the air intake pipe 103 is smaller than the cross-sectional area of ​​the particulate trap 1.

[0048] It should be noted that the cross-sectional area of ​​the particle trap 1 refers to the cross-sectional area of ​​its internal channel perpendicular to the airflow direction, specifically the cross-sectional area of ​​the part of the second housing 101 where the processing unit 102 is located perpendicular to the airflow direction.

[0049] When the cross-sectional area of ​​the inlet pipe 103 is smaller than that of the particulate filter 1, the airflow velocity inside the inlet pipe 103 will be increased to a certain extent due to the sudden increase in the flow area during the process of the gas entering the particulate filter 1 from the inlet pipe 103. The higher airflow velocity can give the gas entering the particulate filter 1 a certain initial kinetic energy, which is conducive to better diffusion and distribution of the gas inside the filter. This ensures that the gas is in full contact with the filter structure of the particulate filter 1, thereby improving the efficiency of particulate collection.

[0050] The smaller cross-sectional area of ​​the intake pipe 103 can guide the airflow into the particulate trap 1 in a relatively concentrated manner, avoiding excessive dispersion of the airflow upon entry. After entering the particulate trap 1, the airflow gradually diffuses within the larger cross-sectional area. This process of first concentrating and then diffusing can change the direction of the airflow, thereby helping to form a more uniform airflow distribution.

[0051] Uniform airflow distribution can prevent local airflow speeds from being too fast or too slow, ensuring that the filtration structure of each part of the particulate filter 1 can function fully, reducing the problem of low local filtration efficiency caused by uneven airflow, and extending the service life of the particulate filter 1.

[0052] Continue to refer to Figures 2 to 3 As shown, in some exemplary embodiments, the regeneration system further includes a catalytic converter 5 connected to the particulate trap 1 via an intake pipe 103, the cross-sectional area of ​​which is smaller than that of the catalytic converter 5.

[0053] It should be noted that the cross-sectional area of ​​the catalytic converter 5 refers to the cross-sectional area of ​​its internal channel perpendicular to the airflow direction, specifically, the cross-sectional area of ​​the part of the first housing 507 where the first post-treatment purification unit 503 is located.

[0054] like Figure 3 and Figure 4 As shown, the catalytic converter 5 includes a first aftertreatment assembly, which specifically includes a first housing 507, a first aftertreatment purification unit 503 disposed within the first housing 507, and a first gasket 508. The first aftertreatment purification unit 503 is mainly used to treat CO and HC in the exhaust gas, and the first gasket 508 surrounds the first aftertreatment purification unit 503 circumferentially, providing good vibration damping.

[0055] One end of the first housing 507 is provided with a first intake cone 502, and the other end of the first housing 507 is provided with a first exhaust cone 505. The inlet of the first intake cone 502 is provided with an intake flange 501 to facilitate connection with the turbine 902 via a flange. The exhaust gas generated by the combustion of the engine module 11 can enter the catalytic converter 5 through the intake flange 501.

[0056] In one example, a heat shield 504 is provided on the outer periphery of the first housing 507 to better protect the components around the catalytic converter 5. A catalytic converter support assembly 506 is provided on the first housing 507. Specifically, the catalytic converter support assembly 506 is welded to the outside of the first encapsulation housing 2 and is screwed to the engine module 11.

[0057] In this embodiment, the cross-sectional area of ​​the intake pipe 103 is smaller than that of the catalytic converter 5. When the gas enters the intake pipe 103 from the catalytic converter 5, the flow velocity in the intake pipe 103 is relatively high. Since the cross-sectional area of ​​the intake pipe 103 is smaller than that of the particulate filter 1, the flow velocity increases as the gas flows from the catalytic converter 5 through the intake pipe 103 into the particulate filter 1. This airflow state of first concentrating and then dispersing allows the gas to fully fill the internal space of the catalytic converter 5 and the particulate filter 1, thereby improving the utilization rate of the catalyst in the catalytic converter 5 and the efficiency of the particulate filter 1 in capturing particles.

[0058] like Figure 3 and Figure 4 As shown, in some exemplary embodiments, the cavity 201 is annular and arranged circumferentially around the intake pipe 103.

[0059] It should be noted that in this application, the housing 2 is sleeve-shaped, and both ends of the housing 2 are provided with flanges along the axial direction of the housing 2. The housing 2 is welded to the outer peripheral wall of the air intake pipe 103 through the flanges at both ends. It should be understood that in addition to welding the housing 2 to the air intake pipe 103, other methods can also be used for connection, such as bolts. However, in this case, it is preferable to provide a sealing gasket between the housing 2 and the air intake pipe 103, and to better prevent gas in the cavity 201 from leaking from the connection between the housing 2 and the air intake pipe 103.

[0060] In this embodiment, the cavity 201 is annular and arranged circumferentially around the intake pipe 103, such that the central axis of the cavity 201 coincides with or is parallel to the central axis of the intake pipe 103. This annular structure allows the cavity 201 to be evenly distributed around the intake pipe 103 in space, forming a continuous and closed annular space. The cavity 201 completely wraps around or surrounds the intake pipe 103 along its circumference without any gaps or interruptions. This arrangement can make full use of the annular space around the intake pipe 103, allowing the oil and gas in the carbon canister 3 to mix thoroughly before entering the intake pipe 103.

[0061] like Figure 5 As shown, in some exemplary embodiments, the intake pipe 103 is provided with multiple rows of openings 1031, and the cavity 201 is connected to the channel inside the intake pipe 103 through the multiple rows of openings 1031. The multiple rows of openings 1031 are arranged at intervals along the axial direction of the intake pipe 103, and each row of openings 1031 includes multiple openings 1031, and the multiple openings 1031 in each row are arranged circumferentially around the intake pipe 103.

[0062] In one example, the opening 1031 is circular. It should be understood that the opening 1031 can also be triangular, square, etc., in addition to being circular. In the above embodiment, multiple openings 1031 are regularly distributed on the side wall of the intake pipe 103. In addition, multiple openings 1031 can also be distributed irregularly.

[0063] In the preferred embodiment described above, multiple rows of openings 1031 are provided on the air intake pipe 103. The multiple rows of openings 1031 are arranged at intervals along the axial direction of the air intake pipe 103. Each row of openings 1031 includes multiple openings 1031. The multiple openings 1031 in each row are arranged at intervals around the air intake pipe 103. This arrangement allows the oil and gas in the cavity 201 to enter the air intake pipe 103 through the multiple openings 1031, thereby enabling the oil and gas to be evenly mixed with the airflow in the air intake pipe 103, which is beneficial to improving the efficiency of subsequent regeneration of the particulate filter 1.

[0064] In addition, the intake pipe 103 is provided with multiple rows of openings 1031. These openings 1031 are not randomly distributed, but have a specific arrangement pattern, so that there are multiple openings 1031 in both the axial and circumferential directions of the intake pipe 103.

[0065] Specifically, the multiple rows of openings 1031 are arranged at intervals along the axial direction of the intake pipe 103, meaning that multiple rows of openings 1031 are distributed sequentially at certain distances along the length of the intake pipe 103. Each row of openings 1031 contains multiple openings 1031, and these openings 1031 are arranged at intervals around the circumference of the intake pipe 103. That is, the multiple openings 1031 in each row are evenly or regularly distributed along the circumference of the intake pipe 103, which is conducive to the uniform mixing of oil and gas with the airflow in the intake pipe 103, and can better improve the mixing efficiency and mixing effect.

[0066] Still refer to Figure 2 and Figure 3 As shown, in order to ensure that oil and gas can smoothly enter the intake pipe 103, in some exemplary embodiments, the cross-sectional area of ​​the connecting pipe 4 is smaller than the cross-sectional area of ​​the intake pipe 103.

[0067] Here, the cross-sectional area of ​​the connecting pipe 4 is smaller than that of the inlet pipe 103, which will generate stronger turbulence and shear force when the fluid passes through the connecting pipe 4, thereby enhancing the mixing effect between the fluids. At the same time, the smaller cross-sectional area of ​​the connecting pipe 4 will limit the flow rate of the system to a certain extent. Since the flow capacity of the connecting pipe 4 is relatively small, it can limit the rate at which oil and gas in the carbon canister 3 enter the cavity 201. On the other hand, the smaller cross-sectional area of ​​the connecting pipe 4 also has certain advantages. Since the smaller cross-sectional area is more sensitive to pressure changes, the pressure difference between the two ends of the connecting pipe 4 can drive the oil and gas in the carbon canister 3 into the cavity 201 of the shell 2.

[0068] To further ensure the smooth entry of oil and gas into the intake pipe 103, continue to refer to... Figure 2 and Figure 3 As shown, in some exemplary embodiments, the angle between the axial direction of the portion of the connecting pipe 4 near the intake pipe 103 and the axial direction of the intake pipe 103 is between 30° and 60°, such as 30°, 40°, 45°, 50°, 60°, etc.

[0069] In this embodiment, the angle between the axial direction of the portion of the connecting pipe 4 near the intake pipe 103 and the axial direction of the intake pipe 103 can be adjusted to change the fluid direction, reduce flow resistance, and improve the stability and uniformity of fluid flow, thereby enhancing the mixing effect of oil and gas with the airflow in the intake pipe 103.

[0070] Specifically, this angle range can effectively limit the flow direction of fluid from the intake pipe 103 into the connecting pipe 4. An angle of 30°-60° is neither as abrupt as a right angle, which would cause a large energy loss and local turbulence, nor as insignificant as a small angle such as less than 30°, which would make it difficult to achieve specific fluid distribution and guidance functions.

[0071] To prevent the airflow in the intake pipe 103 from flowing back into the carbon canister 3, in some exemplary embodiments, a one-way valve is provided on the connecting pipe 4, which can control the unidirectional flow of oil and gas flowing through the connecting pipe 4 into the cavity 201.

[0072] In one example, the check valve is preferably an existing Tesla valve, a passive one-way valve with a fixed geometry. Its complex internal structure consists of a series of alternating piping branches, offering advantages such as high efficiency, reliability, low energy loss, and strong adaptability. It should be understood that other check valves besides Tesla valves can also be used.

[0073] In the above implementation, a one-way valve is installed on the connecting pipe 4. The one-way valve can control the oil and gas flowing through the connecting pipe 4 to flow unidirectionally into the cavity 201, and can better prevent the airflow in the intake pipe 103 from flowing back into the connecting pipe 4, thus maintaining the pressure stability in the exhaust system.

[0074] Still refer to Figure 2 and Figure 3 As shown, in order to prevent engine vibration from being transmitted to the vehicle body or frame, in some exemplary embodiments, the outlet of the particulate filter 1 is provided with a connecting pipe 107, which connects the particulate filter 1 to the muffler 12. The connecting pipe 107 is made of a flexible material.

[0075] In a preferred example, the connecting pipe 107 is a corrugated pipe, which can disconnect the vibration transmission path between the engine and the muffler 12, thereby better preventing the engine vibration from being transmitted to the muffler 12. Since the muffler 12 is mounted on the vehicle body or frame, it can better prevent the engine vibration from being transmitted to the vehicle body or frame.

[0076] In this embodiment, the connecting pipe 107 installed at the outlet of the particulate filter 1 can connect the particulate filter 1 to the muffler 12. The connecting pipe 107 is made of flexible material, which can decouple the exhaust path. The flexible connecting pipe 107 can disconnect the engine vibration, effectively preventing the engine vibration energy from being transmitted to the vehicle body or frame, thereby reducing the occurrence of the rumbling problem inside the vehicle.

[0077] In some exemplary embodiments, the oil / gas inlet of the carbon canister 3 is connected to the evaporation outlet of the fuel tank 6. This connection allows the regeneration system to utilize the carbon canister 3 that is matched to the fuel tank 6 on the vehicle, leveraging existing vehicle components to reduce the weight and cost of the regeneration system. The air inlet of the carbon canister 3 is connected to a carbon canister air filter 3, ensuring a good supply of fresh air to the carbon canister 3, extending its service life, reducing replacement frequency, and lowering maintenance costs.

[0078] It should be noted that the reason for utilizing the fuel vapor within the carbon canister 3 is that there is no need to separately install fuel supply, atomization, and ignition mechanisms. In typical vehicles, the fuel vapor inlet of the carbon canister 3 is connected to the evaporation outlet of the fuel tank 6. The fuel in the vehicle's fuel tank 6 will evaporate due to factors such as temperature changes and vehicle vibrations, producing fuel vapor. If this vapor is directly released into the atmosphere, it will cause air pollution and fuel waste.

[0079] Therefore, the evaporation outlet of oil tank 6 is connected to the oil vapor inlet of carbon canister 3 via a pipe. When the pressure inside oil tank 6 increases, oil vapor will enter carbon canister 3 through the evaporation outlet. Carbon canister 3 is filled with adsorbent materials such as activated carbon. These materials have a large number of microporous structures, which can efficiently adsorb hydrocarbons in oil vapor.

[0080] When the engine is running, the vacuum in the engine intake manifold allows air to enter the carbon canister 3 through the air inlet, carrying away the oil vapors adsorbed on the activated carbon. This air containing oil vapors enters the engine's intake system and participates in the combustion process, thereby achieving oil vapor recovery and reducing emissions.

[0081] In some of the exemplary implementations, such as Figure 1 As shown, the air inlet of the carbon canister 3 is connected to a carbon canister air filter 3.

[0082] It should be noted that if dust, particulate matter, or other impurities in the air enter the carbon canister 3, they will adhere to the surface of the activated carbon, clogging the micropores and reducing its adsorption capacity. The carbon canister air filter 3 can effectively filter these impurities, extending the service life of the carbon canister 3, reducing the frequency of replacement, and lowering maintenance costs.

[0083] In this technology, clean air entering the carbon canister 3 can better carry out the adsorbed oil vapors and participate in combustion, resulting in a more uniform air-fuel mixture and more complete combustion. This helps improve engine power performance, reduce fuel consumption and exhaust emissions, and enhance the overall performance and fuel economy of the vehicle.

[0084] The carbon canister air filter 3 is typically installed at the air inlet of the carbon canister 3. It mainly consists of a filter element and a housing. The filter element is generally made of materials such as paper or sponge and has a porous structure, which can effectively filter impurities such as dust, pollen, and particulate matter from the air entering the carbon canister 3, preventing these impurities from entering the carbon canister 3 and affecting its normal operation. The carbon canister air filter 3 ensures the quality of the air entering the carbon canister 3, thereby ensuring smooth desorption of oil and gas.

[0085] In one example, refer to Figure 1 The diagram shown is a structural block diagram of the regeneration system in its application state. The regeneration system includes a turbocharger 9, an air filter 8, an intercooler radiator 10, and an engine module 11.

[0086] The turbocharger 9 includes a turbine 902 and a compressor 901. Specifically, the turbine 902 is connected to the engine module 11, the compressor 901 is connected to the air filter 8 and the intercooler radiator 10 respectively, and the intercooler radiator 10 is connected to the engine module 11.

[0087] The turbine 902 is sequentially connected to the catalytic converter 5, particulate filter 1, and muffler 12 modules. The exhaust gas produced after engine combustion is discharged at high speed through the exhaust pipe, carrying a large amount of heat and kinetic energy. The turbocharger 9 uses the energy of this exhaust gas to drive the turbine 902 to rotate. The turbine 902 and the compressor 901 are connected through the same shaft, and the rotation of the turbine 902 drives the compressor 901 to rotate synchronously.

[0088] The aforementioned intercooler radiator 10 is located between the outlet of the compressor 901 and the engine intake manifold. After the compressor 901 compresses the outside air, it first passes through the intercooler radiator 10 for heat dissipation, and then sends it into the engine intake manifold to provide the engine with air of suitable pressure and temperature.

[0089] In the above-described embodiments of this application, clean air can better carry the adsorbed oil vapor to the intake pipe 103. Since the air contains more oxygen, this oxygen and oil vapor are fully mixed with the airflow flowing through the intake pipe 103 discharged with the exhaust system and then enter the particulate filter 1. A high-temperature environment can be generated in the particulate filter 1 to activate the carbon particulate combustion chain reaction, thereby improving low-speed regeneration efficiency and fuel economy.

[0090] The regeneration system in this embodiment injects a mixture of fuel vapor and air from the carbon canister 3 into the front end of the particulate filter 1 via a venturi tube under negative pressure. The fuel vapor mixture is injected using exhaust kinetic energy. The strong catalytic effect of the fuel vapor oxidation reaction can directly increase the temperature of the particulate filter 1 chamber 201. At the same time, the supplementation of excess oxygen can activate the self-sustaining combustion chain reaction of carbon soot particles. This can effectively solve the path dependence of the particulate filter 1 regeneration on high engine load conditions and improve the regeneration efficiency in low-speed scenarios.

[0091] It is worth noting that, regarding the regeneration system of this embodiment, based on the above exemplary implementations, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 3 As shown, it may include, for example, a particulate trap 1 and a regeneration device capable of regenerating the particulate trap 1.

[0092] The particulate filter 1 includes a treatment unit 102 for treating exhaust gas in the exhaust system, and an intake pipe 103 located upstream of the treatment unit 102 along the airflow direction within the exhaust system. The regeneration device includes a housing 2 that forms a cavity 201 with the intake pipe 103, and a carbon canister 3 connected to the cavity 201 via a connecting pipe 4. The cavity 201 communicates with a passage within the intake pipe 103. Oil and gas in the carbon canister 3 can enter the intake pipe 103 via the connecting pipe 4 and the cavity 201, and flow through the treatment unit 102 with the airflow within the intake pipe 103.

[0093] In the preferred embodiment of the above regeneration system, the specific settings and arrangements of the carbon tank 3, the connecting pipe 4, etc., can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the carbon tank 3 and the connecting pipe, etc., can also be referred to the descriptions in the above exemplary embodiments.

[0094] An embodiment of the second aspect of this application provides a vehicle equipped with the regeneration system described above. The arrangement of the regeneration system on the vehicle and its connection with related components on the vehicle can still be referred to the above description, and will not be described in detail here.

[0095] In this embodiment, the vehicle utilizes the above-mentioned regeneration system. The oil and gas flow through the airflow in the intake pipe 103 and pass through the processing unit 102, which can generate a high-temperature environment in the particulate filter 1, thereby triggering a particulate combustion chain reaction. This regeneration method can eliminate the dependence of active regeneration on external functions and improve low-speed regeneration efficiency and fuel economy.

[0096] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A regeneration system, characterized in that: It includes a particle trap (1) and a regeneration device capable of regenerating the particle trap (1); The particulate filter (1) includes a treatment unit (102) for treating exhaust gas in the exhaust system, and an intake pipe (103) located upstream of the treatment unit (102) along the airflow direction in the exhaust system. The regeneration device includes a housing (2) that forms a cavity (201) with the air inlet pipe (103), and a carbon canister (3) that is connected to the cavity (201) via a connecting pipe (4), the cavity (201) being connected to a channel inside the air inlet pipe (103); The oil and gas in the carbon canister (3) can enter the air inlet pipe (103) through the connecting pipe (4) and the cavity (201), and flow through the processing unit (102) with the airflow in the air inlet pipe (103).

2. The regeneration system according to claim 1, characterized in that: The cross-sectional area of ​​the air intake pipe (103) is smaller than the cross-sectional area of ​​the particulate trap (1).

3. The regeneration system according to claim 2, characterized in that: It also includes a catalytic converter (5) connected to the particulate trap (1) via the intake pipe (103), wherein the cross-sectional area of ​​the intake pipe (103) is smaller than the cross-sectional area of ​​the catalytic converter (5).

4. The regeneration system according to claim 1, characterized in that: The cavity (201) is annular and arranged circumferentially around the air intake pipe (103).

5. The regeneration system according to claim 4, characterized in that: The air intake pipe (103) is provided with multiple rows of openings (1031), and the cavity (201) and the channel inside the air intake pipe (103) are connected through the multiple rows of openings (1031); Multiple rows of openings (1031) are arranged at intervals along the axial direction of the air intake pipe (103), each row of openings (1031) includes multiple openings (1031), and the multiple openings (1031) in each row are arranged at intervals around the air intake pipe (103).

6. The regeneration system according to claim 1, characterized in that: The cross-sectional area of ​​the connecting pipe (4) is smaller than the cross-sectional area of ​​the intake pipe (103); and / or, The angle between the axial direction of the portion of the connecting pipe (4) near the air intake pipe (103) and the axial direction of the air intake pipe (103) is between 30° and 60°.

7. The regeneration system according to claim 1, characterized in that: The connecting pipe (4) is equipped with a one-way valve, which can control the oil and gas flowing through the connecting pipe (4) to flow unidirectionally into the cavity (201).

8. The regeneration system according to claim 1, characterized in that: The particle trap (1) has a connecting pipe (107) at its outlet, which connects the particle trap (1) to the silencer (12). The connecting pipe (107) is made of a flexible material.

9. The regeneration system according to any one of claims 1-8, characterized in that: The oil and gas inlet of the carbon canister (3) is connected to the evaporation outlet of the oil tank (6); and / or, A carbon canister air filter (7) is connected to the air inlet of the carbon canister (3).

10. A vehicle, characterized in that: The vehicle is equipped with the regeneration system as described in claim 9.

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