Exhaust catalyst and vehicle
By introducing a phase change energy storage medium into the exhaust catalyst to exchange heat with the catalytic purification unit, the emission problem during low-temperature start-up of the catalyst is solved, achieving rapid ignition and efficient purification.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GREAT WALL MOTOR CO LTD
- Filing Date
- 2025-09-22
- Publication Date
- 2026-07-07
AI Technical Summary
When a car is cold-started or frequently started and stopped, the catalytic converter does not reach the ignition temperature, leading to a surge in emissions of pollutants such as CO and HC, which is difficult to solve effectively with existing technologies.
Design an exhaust catalyst comprising an energy storage component and a catalytic purification unit. Utilize a phase change energy storage medium to exchange heat with the catalytic purification unit, rapidly heating the catalytic purification unit to the ignition temperature during low-temperature start-up or frequent start-stop cycles.
It effectively shortens the ignition time of the catalytic purification unit, reduces the possibility of exceeding emission standards, and improves exhaust gas purification efficiency.
Smart Images
Figure CN224469199U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of exhaust gas purification technology, and in particular to an exhaust catalyst and a vehicle. Background Technology
[0002] Currently, when a car is cold-started, the engine temperature is low, and the catalytic converter has not reached the ignition temperature (usually >200℃), causing the emissions of pollutants such as CO and HC to surge to more than 5 times that under normal operating conditions. Moreover, in hybrid vehicles, the catalytic converter faces repeated cooling and reheating when frequently starting and stopping or switching power modes, which further aggravates the deterioration of exhaust gases, indicating room for improvement. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an exhaust catalytic converter that can heat the catalytic purification unit during low-temperature vehicle starts, frequent start-stop cycles, or power mode switching, enabling the catalytic purification unit to quickly reach its ignition temperature, effectively shortening the ignition time of the catalytic purification unit, and reducing the possibility of excessive emissions.
[0004] The exhaust gas catalyst according to an embodiment of the present invention is characterized in that it includes: an aftertreatment purification unit assembly, the aftertreatment purification unit assembly including a mounting housing and a catalytic purification unit, wherein a generating chamber is formed inside the mounting housing, the catalytic purification unit is installed inside the generating chamber, and the catalytic purification unit is used to purify exhaust gas; and an energy storage assembly, the energy storage assembly including an energy storage housing and a phase change energy storage medium, the energy storage housing being installed outside the mounting housing, and the phase change energy storage medium being disposed inside the energy storage housing and used to exchange heat with the catalytic purification unit.
[0005] According to the exhaust catalytic converter of this utility model embodiment, by setting a catalytic purification unit in the mounting housing, it can promote the oxidation-reduction reaction of harmful gases in the exhaust gas to convert them into harmless substances, thereby reducing environmental pollution. At the same time, by setting a phase change energy storage medium in the energy storage housing, the phase change energy storage medium can exchange heat with the catalytic purification unit, so that when the vehicle starts at low temperature, frequently starts and stops, or switches power modes, the latent heat is released to the catalytic purification unit to heat the catalytic purification unit, so that the catalytic purification unit can quickly reach the ignition temperature, effectively shortening the ignition time of the catalytic purification unit and reducing the possibility of emission exceeding standards.
[0006] According to some embodiments of the present invention, the exhaust catalyst has two energy storage chambers formed inside the energy storage housing, at least one of the energy storage chambers is provided with the phase change energy storage medium, and the two energy storage chambers are distributed sequentially in a direction away from the mounting housing.
[0007] According to some embodiments of the present invention, in the exhaust catalyst, the energy storage housing has a movable partition between the two energy storage chambers, the movable partition separating the two energy storage chambers; wherein, the movable partition is configured to be movable in a direction away from or close to the mounting housing, and one of the two energy storage chambers has an elastic element, the elastic element being used to elastically pre-tighten the position of the movable partition relative to the mounting housing.
[0008] According to some embodiments of the present invention, in the exhaust catalyst, one of the two energy storage chambers is an inner chamber and the other is an outer chamber. The elastic element is located in the inner chamber, and both ends of the elastic element are respectively connected to the inner wall of the inner chamber and the movable partition.
[0009] According to some embodiments of the present invention, the exhaust catalyst has multiple elastic elements, and the multiple elastic elements are spaced apart in the energy storage cavity along the length direction and / or width direction of the energy storage cavity.
[0010] According to some embodiments of the present invention, the exhaust catalyst has an energy storage housing structured as an annular housing and an energy storage cavity structured as an annular cavity. The energy storage housing is sleeved outside the mounting housing, and the energy storage cavity extends around the mounting housing.
[0011] According to some embodiments of the present invention, an exhaust catalyst is provided with an elastic buffer pad between the mounting housing and the catalytic purification unit.
[0012] According to some embodiments of the present invention, the exhaust catalyst further includes an intake end assembly and an exhaust end assembly, wherein the intake end assembly is connected to the intake end of the mounting housing, and the exhaust end assembly is connected to the exhaust end of the mounting housing.
[0013] According to some embodiments of the present invention, the exhaust catalytic converter includes an oxygen sensor base for mounting an oxygen sensor in the intake end assembly; and / or, it further includes an exhaust pipe connected to the outlet end of the exhaust end assembly, the exhaust pipe being fixedly connected to a bracket structure for connecting to the vehicle body.
[0014] This utility model also proposes a vehicle.
[0015] The vehicle according to the present invention includes the exhaust catalyst described in any of the above embodiments.
[0016] The vehicle and the exhaust catalytic converter described above have the same advantages over existing technologies, which will not be elaborated here.
[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0019] Figure 1 This is a schematic diagram of the structure of the exhaust catalyst according to an embodiment of the present invention. Figure 1 ;
[0020] Figure 2 This is a schematic diagram of the structure of the exhaust catalyst according to an embodiment of the present invention. Figure 2 ;
[0021] Figure 3 yes Figure 2 A schematic diagram of the cross-section at point AA.
[0022] Figure label:
[0023] Exhaust catalytic converter 100,
[0024] Post-treatment purification unit assembly 1, mounting housing 11, generating chamber 111, elastic buffer pad 112, catalytic purification unit 12.
[0025] Energy storage shell 21, energy storage cavity 211, inner cavity 2111, outer cavity 2112, movable partition 212, elastic element 22.
[0026] Intake assembly 3, oxygen sensor base 31, exhaust assembly 4, exhaust pipe 5, bracket structure 51, connector 52, intake flange 6, exhaust flange 7. Detailed Implementation
[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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 of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] Unless otherwise specified, the front-back direction in this application refers to the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction refers to the lateral direction of the vehicle, i.e., the Y direction; and the up-down direction refers to the vertical direction of the vehicle, i.e., the Z direction.
[0031] The following is for reference. Figures 1-3 The exhaust catalytic converter 100 according to the present invention can heat the catalytic purification unit 12 when the vehicle is started at low temperature, frequently starts and stops, or switches power modes, so that the catalytic purification unit 12 can quickly reach the ignition temperature, effectively shorten the ignition time of the catalytic purification unit 12, and reduce the possibility of emission exceeding the standard.
[0032] like Figures 1-3 As shown, an exhaust catalyst 100 according to an embodiment of the present invention includes: an aftertreatment purification unit assembly 1 and an energy storage assembly.
[0033] The aftertreatment purification unit assembly 1 includes a mounting housing 11 and a catalytic purification unit 12. A generation chamber 111 is formed inside the mounting housing 11, and the catalytic purification unit 12 is installed inside the generation chamber 111. The catalytic purification unit 12 is used to purify the exhaust gas. The energy storage assembly includes an energy storage housing 21 and a phase change energy storage medium. The energy storage housing 21 is installed outside the mounting housing 11, and the phase change energy storage medium is disposed inside the energy storage housing 21 and is used to exchange heat with the catalytic purification unit 12.
[0034] Specifically, the exhaust catalytic converter 100 is a key external purification device installed in the vehicle's exhaust system. Its core function is to convert harmful gases in the exhaust gas into harmless carbon dioxide, water, and nitrogen through oxidation-reduction reactions, thereby significantly reducing the pollution of exhaust gas to the environment.
[0035] The exhaust catalytic converter 100 includes an aftertreatment purification unit assembly 1, which is the core component for reducing pollutant emissions. It can convert harmful substances in the exhaust gas into harmless substances through physical filtration, chemical reaction, or regeneration mechanisms to meet environmental regulations. The aftertreatment purification unit assembly 1 includes a mounting housing 11 and a catalytic purification unit 12. The catalytic purification unit 12 is used to purify the exhaust gas and includes a catalyst, which can be a precious metal catalyst, etc., to promote the oxidation-reduction reaction of harmful gases to convert them into harmless substances. The mounting housing 11 serves as the outer housing of the aftertreatment purification unit assembly 1 and provides a reaction space for the purification of exhaust gas. A generation chamber 111 is formed inside the mounting housing 11. The generation chamber 111 has a certain volume and can provide a reaction space for harmful gases in the exhaust gas. The catalytic purification unit 12 is installed in the mounting housing 11 so that the exhaust gas can enter the generation chamber 111 and undergo an oxidation-reduction reaction within the generation chamber 111.
[0036] Meanwhile, the exhaust catalytic converter 100 also includes an energy storage component, which is used to exchange heat with the catalytic purification unit 12, enabling the catalytic purification unit 12 to quickly reach the ignition temperature, shortening the ignition time of the catalytic purification unit 12, and reducing the possibility of excessive emissions. The energy storage component includes an energy storage shell 21 and a phase change energy storage medium. The phase change energy storage medium is a substance that undergoes reversible phase transitions between different phases and absorbs or releases a large amount of latent heat during the transition. The phase change energy storage medium is used to exchange heat with the catalytic purification unit 12. That is, the phase change energy storage medium can absorb the heat of the catalytic purification unit 12 while undergoing phase transition and store it in the form of latent heat. Conversely, it can also release the latent heat to the catalytic purification unit 12 while undergoing phase transition to heat the catalytic purification unit 12, so that the catalytic purification unit 12 can quickly reach the ignition temperature.
[0037] The phase change energy storage medium can be water, which can undergo a phase change between liquid water and water vapor to absorb or release latent heat. Alternatively, the phase change energy storage medium can be a metal melt, which has a short-range or medium-range ordered structure in the liquid state. When the temperature changes, these structures may be reconstructed, leading to a liquid-liquid phase change. The material of the phase change energy storage medium is not limited to that described in this embodiment and can be flexibly selected according to the actual situation.
[0038] It should be noted that when the vehicle is started at low temperatures, frequently starts and stops, or switches power modes, the catalytic purification unit 12 may not be able to reach the ignition temperature, which will greatly reduce the effect of purifying the exhaust gas. By setting a phase change energy storage medium, the phase change energy storage medium can undergo a phase change to release latent heat to the catalytic purification unit 12, so that the catalytic purification unit 12 can absorb heat to quickly reach the ignition temperature.
[0039] Furthermore, the energy storage housing 21, as the outer housing of the energy storage component, provides a space for the phase change energy storage medium. This creates a certain space within the energy storage housing 21, allowing the phase change energy storage medium to be placed inside, preventing loss or leakage. This ensures reliable heat exchange between the phase change energy storage medium and the catalytic purification unit 12. Installing the energy storage housing 21 outside the mounting housing 11 connects the energy storage housing 21 to the mounting housing 11, fixing them relatively. This allows the phase change energy storage medium to reliably exchange heat with the catalytic purification unit 12 from the outside, releasing latent heat to the catalytic purification unit 12 during low-temperature vehicle starts, frequent start-stop cycles, or power mode switching, thus heating the catalytic purification unit 12 and ensuring its reliable operation.
[0040] According to the exhaust catalytic converter 100 of this utility model embodiment, by setting a catalytic purification unit 12 in the mounting housing 11, harmful gases in the exhaust gas can undergo oxidation-reduction reactions to be converted into harmless substances, thereby reducing environmental pollution. At the same time, by setting a phase change energy storage medium in the energy storage housing 21, the phase change energy storage medium can exchange heat with the catalytic purification unit 12, so that when the vehicle starts at low temperatures, frequently starts and stops, or switches power modes, the latent heat is released to the catalytic purification unit 12 to heat the catalytic purification unit 12, so that the catalytic purification unit 12 can quickly reach the ignition temperature, effectively shortening the ignition time of the catalytic purification unit 12 and reducing the possibility of emission exceeding standards.
[0041] In some embodiments, two energy storage cavities 211 are formed inside the energy storage housing 21, and at least one energy storage cavity 211 is provided with a phase change energy storage medium. The two energy storage cavities 211 are distributed sequentially along a direction away from the mounting housing 11.
[0042] Specifically, the energy storage shell 21 is used to accommodate the phase change energy storage medium. Two energy storage cavities 211 are formed inside the energy storage shell 21. Both energy storage cavities 211 have a certain volume, and the phase change energy storage medium can be placed in one of the energy storage cavities 211 or in both energy storage cavities 211. This ensures the reliability of accommodating the phase change energy storage medium, and thus ensures the reliability of heat exchange between the phase change energy storage medium and the catalytic purification unit 12. The two energy storage cavities 211 are distributed sequentially in a direction away from the mounting shell 11. That is, in the direction from the mounting shell 11 to the energy storage shell 21, the mounting shell 11 and the two energy storage cavities 211 are distributed sequentially. This allows both energy storage cavities 211 to be located on the outside of the mounting shell 11, so as to avoid interference between any energy storage cavity 211 and the generating cavity 111. This ensures the reliability of setting up the phase change energy storage medium and the catalytic purification unit 12 respectively, and thus ensures the reliability of heat exchange between the phase change energy storage medium and the catalytic purification unit 12.
[0043] In some embodiments, a movable partition 212 is provided inside the energy storage housing 21 between two energy storage cavities 211, the movable partition 212 separating the two energy storage cavities 211; wherein, the movable partition 212 is configured to be movable in a direction away from or close to the mounting housing 11, and an elastic member 22 is provided in one of the two energy storage cavities 211, the elastic member 22 being used to elastically pre-tighten the position of the movable partition 212 relative to the mounting housing 11.
[0044] Specifically, the energy storage housing 21 forms two energy storage cavities 211, which are distributed sequentially along the direction away from the mounting housing 11. A movable partition 212 is provided between the two energy storage cavities 211, so that the movable partition 212 can be set inside the energy storage housing 21 to divide the internal space of the energy storage housing 21 into two energy storage cavities 211. The movable partition 212 is movable relative to the energy storage housing 21. The movable partition 212 is set to move along the direction away from or close to the mounting housing 11, that is, the movable partition 212 can move between the two energy storage cavities 211 to change the volume of the two energy storage cavities 211.
[0045] Furthermore, an elastic element 22 is provided in one of the two energy storage chambers 211. The elastic element 22 is used to elastically pre-tighten the position of the movable partition 212 relative to the mounting housing 11. The elastic element 22 is connected to the movable partition 212, so that the elastic element 22 can apply an initial pre-tightening force to the movable partition 212, thereby ensuring that the movable partition 212 is always between the two energy storage chambers 211. This prevents the movable partition 212 from having an excessively large movement distance, which would cause the two energy storage chambers 211 to overlap. In this way, in the initial state, the movable partition 212 can be in a certain position within the energy storage housing 21. When the latent heat of the phase change energy storage medium is released to the catalytic purification unit 12, causing a change in the pressure within the energy storage chamber 211, the movable partition 212 can move accordingly. At this time, the elastic element 22 can deform under the action of the movable partition 212, and the movement of the movable partition 212 will cause turbulence in the phase change energy storage medium, which can improve the heat exchange efficiency between the phase change energy storage medium and the catalytic purification unit 12. Among them, the elastic element 22 can be a disc spring, etc.
[0046] Specifically, when a phase change energy storage medium is provided in only one of the energy storage chambers 211, and the phase change energy storage medium and the elastic element 22 are respectively provided in one energy storage chamber 211, such as providing the phase change energy storage medium in one energy storage chamber 211 near the mounting housing 11 and providing the elastic element 22 in another energy storage chamber 211, when the phase change energy storage medium releases latent heat to the catalytic purification unit 12, the pressure in the energy storage chamber 211 where the phase change energy storage medium is provided decreases, the movable partition 212 moves towards the mounting housing 11, the elastic element 22 stretches, and the movement of the movable partition 212 promotes the turbulence of the phase change energy storage medium, thereby improving the heat exchange efficiency between the phase change energy storage medium and the catalytic purification unit 12.
[0047] Conversely, when a phase change energy storage medium is placed in one energy storage cavity 211 away from the mounting housing 11, and an elastic element 22 is placed in the other energy storage cavity 211, the phase change energy storage medium releases latent heat to the catalytic purification unit 12. The pressure in the energy storage cavity 211 containing the phase change energy storage medium decreases, the movable partition 212 moves away from the mounting housing 11, and the elastic element 22 stretches. The movement of the movable partition 212 promotes turbulence in the phase change energy storage medium, improving the heat exchange efficiency between the phase change energy storage medium and the catalytic purification unit 12. It should be noted that in this case, an appropriate amount of thermally conductive material or medium needs to be filled in the energy storage cavity 211 with the elastic element 22 to prevent the energy storage cavity 211 from acting as insulation, which would reduce the heat exchange efficiency between the phase change energy storage medium and the catalytic purification unit 12. Alternatively, a certain amount of phase change energy storage medium can be filled in both energy storage cavities 211.
[0048] When phase change energy storage media are simultaneously installed in both energy storage chambers 211, when the elastic element 22 is placed in one energy storage chamber 211 closer to the mounting housing 11, the phase change energy storage media in the energy storage chamber 211 closer to the mounting housing 11 is closer to the catalytic purification unit 12, resulting in a high heat exchange rate and the ability to quickly release latent heat to the catalytic purification unit 12. Conversely, the phase change energy storage media in the energy storage chamber 211 farther from the mounting housing 11 is farther from the catalytic purification unit 12, resulting in a low heat exchange rate. This means that the pressure in the energy storage chamber 211 closer to the mounting housing 11 decreases more quickly. The movable partition 212 moves towards the mounting housing 11, compressing the elastic element 22. The movement of the movable partition 212 promotes turbulence in the phase change energy storage media, further improving the heat exchange efficiency between the phase change energy storage media in the energy storage chamber 211 closer to the mounting housing 11 and the catalytic purification unit 12.
[0049] Conversely, when the elastic element 22 is placed in an energy storage cavity 211 away from the mounting housing 11, the phase change energy storage medium in the energy storage cavity 211 close to the mounting housing 11 can quickly release its latent heat to the catalytic purification unit 12. However, the heat exchange rate between the phase change energy storage medium in the energy storage cavity 211 away from the mounting housing 11 and the catalytic purification unit 12 is low, meaning that the pressure in the energy storage cavity 211 close to the mounting housing 11 will decrease more quickly. The movable partition 212 moves towards the mounting housing 11, the elastic element 22 stretches, and the movement of the movable partition 212 promotes turbulence in the phase change energy storage medium, further improving the heat exchange efficiency between the phase change energy storage medium in the energy storage cavity 211 close to the mounting housing 11 and the catalytic purification unit 12.
[0050] In some embodiments, one of the two energy storage cavities 211 is an inner cavity 2111 and the other is an outer cavity 2112. The elastic member 22 is located in the inner cavity 2111, and the two ends of the elastic member 22 are respectively connected to the inner wall of the inner cavity 2111 and the movable partition 212.
[0051] Specifically, the two energy storage cavities 211 are distributed sequentially along the direction away from the mounting housing 11, with one of the two energy storage cavities 211 being the inner cavity 2111 and the other being the outer cavity 2112. That is, the energy storage cavity 211 closer to the mounting housing 11 is the inner cavity 2111, and the energy storage cavity 211 farther away from the mounting housing 11 is the outer cavity 2112. The elastic element 22 is set in the inner cavity 2111, that is, the inner cavity 2111 can provide space for the elastic element 22. The two ends of the elastic element 22 are respectively connected to the inner wall of the inner cavity 2111 and the movable partition 212, which can realize the reliable installation of the elastic element 22 and avoid the displacement of the elastic element 22, which would reduce the reliability of the operation. Then, when the phase change energy storage medium releases latent heat to the catalytic purification unit 12, the elastic element 22 can drive the movable partition 212 to move, thereby promoting the turbulence of the phase change energy storage medium.
[0052] In some embodiments, there are multiple elastic elements 22, and the multiple elastic elements 22 are spaced apart and distributed in the energy storage cavity 211 along the length direction and / or width direction of the energy storage cavity 211.
[0053] Specifically, the elastic element 22 is used to drive the movable partition 212 to move in order to promote the turbulence of the phase change energy storage medium. Multiple elastic elements 22 can be set, that is, the number of elastic elements 22 can be two, three or more. In this way, multiple elastic elements 22 can jointly drive the movable partition 212 to move, thereby improving the reliability of the elastic elements 22 driving the movable partition 212 to move, and thus improving the reliability of promoting the turbulence of the phase change energy storage medium. Moreover, multiple elastic elements 22 can be distributed along the length or width direction of the energy storage cavity 211, or multiple elastic elements 22 can be distributed along both the length and width directions of the energy storage cavity 211, so that the elastic elements 22 can simultaneously drive the movable partition 212 at multiple positions, thereby improving the reliability and stability of the elastic elements 22 driving the movable partition 212 to move, and thus effectively promoting the turbulence of the phase change energy storage medium and improving the heat exchange efficiency between the phase change energy storage medium and the catalytic purification unit 12.
[0054] The multiple elastic elements 22 are all set inside the energy storage cavity 211, which can protect the elastic elements 22 from the influence of the external environment, improve the reliability of the operation of the elastic elements 22, and help extend the service life of the elastic elements 22.
[0055] In some embodiments, the energy storage housing 21 is configured as an annular housing and the energy storage cavity 211 is configured as an annular cavity. The energy storage housing 21 is sleeved on the outside of the mounting housing 11 and the energy storage cavity 211 extends around the mounting housing 11.
[0056] Specifically, such as Figure 3 As shown, the energy storage shell 21 is constructed as an annular shell, with an internal cavity. The energy storage shell 21 can then be fitted onto the outside of the mounting shell 11, allowing it to connect and be relatively fixed. This ensures reliable heat exchange between the phase change energy storage medium and the catalytic purification unit 12. Furthermore, the energy storage cavity 211 is constructed as an annular cavity, fitting around the periphery of the mounting shell 11. This allows it to be positioned opposite the mounting shell 11, facilitating heat exchange between the phase change energy storage medium and the catalytic purification unit 12. Extending around the mounting shell 11 provides a certain length, increasing the contact area between the energy storage cavity 211 and the mounting shell 11. This increases the heat exchange area between the phase change energy storage medium and the catalytic purification unit 12, improving heat exchange efficiency and effectively shortening the ignition time of the catalytic purification unit 12.
[0057] It should be noted that, in practice, the energy storage cavity 211 containing the phase change energy storage medium can be divided into multiple regions, and the phase change energy storage medium can be filled in each region to further improve the heat exchange efficiency between the phase change energy storage medium and the catalytic purification unit.
[0058] In some embodiments, an elastic buffer pad 112 is provided between the mounting housing 11 and the catalytic purification unit 12.
[0059] The catalytic purification unit 12 also includes a catalyst support, which is used to set the catalyst. For example, the catalyst support can be cordierite, which has a honeycomb porous structure to greatly increase the surface area, which is conducive to the adhesion and dispersion of the catalyst. This structure also allows the exhaust gas to pass smoothly through the catalyst support and fully contact the catalyst, thereby improving the purification efficiency.
[0060] like Figure 3 As shown, an elastic buffer pad 112 is provided between the mounting housing 11 and the catalytic purification unit 12. The elastic buffer pad 112 is used to connect the mounting housing 11 and the catalyst carrier. Filling the space between the mounting housing 11 and the catalyst carrier with the elastic buffer pad 112 can form an airtight barrier to prevent exhaust gas leakage. Furthermore, cordierite-based catalyst carriers are highly brittle and are prone to breakage due to vibration or impact if in direct contact with the mounting housing 11. The elastic buffer pad 112 provides a securing force to fix the catalyst carrier within the mounting housing 11, preventing it from moving or falling off. During vehicle operation, engine vibration is transmitted to the mounting housing 11, and the elastic buffer pad 112 can absorb vibration energy, reducing the vibration frequency of the catalyst carrier and preventing fatigue damage due to resonance. The elastic buffer pad 112 can be made of fiber materials, etc.
[0061] In some embodiments, the exhaust catalyst 100 further includes an intake end assembly 3 and an exhaust end assembly 4, the intake end assembly 3 being connected to the intake end of the mounting housing 11, and the exhaust end assembly 4 being connected to the exhaust end of the mounting housing 11.
[0062] Specifically, the intake end assembly 3 is connected to the intake end of the mounting housing 11, allowing exhaust gas to enter the mounting housing 11 through the intake end assembly 3 and be purified within the mounting housing 11, such as... Figures 1-2 As shown, the intake end assembly 3 is conical in shape, and the inner diameter of the intake end assembly 3 gradually increases along the direction close to the mounting housing 11. That is, when the exhaust gas enters the mounting housing 11 through the intake end assembly 3, it can flow from the smaller inner diameter to the larger inner diameter, which can slow down the exhaust gas and allow it to flow slowly into the generating chamber 111. In the generating chamber 111, it can fully contact the catalyst, thereby improving the reliability of exhaust gas purification.
[0063] Simultaneously, the exhaust end assembly 4 is connected to the outlet end of the mounting housing 11, allowing the purified exhaust gas to flow from the mounting housing 11 to the exhaust end assembly 4 before being discharged. Figures 1-2 As shown, the exhaust end assembly 4 is conical in shape, and the inner diameter of the exhaust end assembly 4 gradually decreases along the direction away from the mounting housing 11. That is, after the exhaust gas is purified in the generating chamber 111, it can flow from the larger inner diameter of the exhaust end assembly 4 to the smaller inner diameter, which can accelerate the exhaust gas and allow it to be discharged quickly, thereby avoiding the reverse flow of the exhaust gas and improving the reliability of exhaust gas discharge.
[0064] In some embodiments, the intake end assembly 3 is provided with an oxygen sensor base 31 for mounting an oxygen sensor; and / or, it also includes an exhaust pipe 5, which is connected to the exhaust end assembly 4 and is fixedly connected to a bracket structure 51 for connecting to the vehicle body.
[0065] Specifically, the oxygen sensor base 31 is used to install the oxygen sensor. The oxygen sensor base 31 is installed on the intake end assembly 3. It can be connected by welding to improve the reliability of connecting the oxygen sensor to the intake end assembly 3. The oxygen sensor can then be installed in front of the mounting housing 11 so that the oxygen sensor can detect the oxygen content in the exhaust gas after engine combustion in real time. When the oxygen content in the exhaust gas is too high, the oxygen sensor outputs a low voltage signal. When the oxygen content in the exhaust gas is too low, the oxygen sensor outputs a high voltage signal. These signals are transmitted to the engine control unit (ECU). The ECU adjusts the fuel injection quantity according to the signal to make the air-fuel ratio close to the theoretical value, ensuring complete combustion of fuel and reducing the emission of harmful gases.
[0066] Simultaneously, the exhaust pipe 5 is connected to the outlet end of the exhaust end assembly 4, allowing the purified exhaust gas to enter the exhaust pipe 5 through the exhaust end assembly 4. The exhaust pipe 5 has a certain length to guide the flow of exhaust gas, meaning it can discharge the purified exhaust gas. Furthermore, the exhaust pipe 5 is connected to a bracket structure 51, which is used to connect to the vehicle body to fix the exhaust pipe 5, thereby fixing the exhaust catalytic converter 100 and ensuring its reliable operation. Figure 1 As shown, the bracket structure 51 can be connected to the engine via the connector 52. The connector 52 can be inserted into both the bracket structure 51 and the engine to reliably fix the exhaust pipe 5. Furthermore, the exhaust pipe 5 can be fixedly connected to the bracket structure 51, for example, by welding, to improve the reliability of the connection between the bracket structure 51 and the exhaust pipe 5.
[0067] And, such as Figures 1-2As shown, an intake flange 6 is provided on the front side of the intake end assembly 3. The intake flange 6 is used to achieve a reliable and flexible connection through a standardized interface. By connecting the intake flange 6 to the front side of the intake end assembly 3, the exhaust catalyst 100 can be fixed from the front side. At the same time, an exhaust flange 7 is provided on the rear side of the exhaust pipe 5. The exhaust flange 7 is used to achieve a reliable and flexible connection through a standardized interface. By connecting the exhaust flange 7 to the rear side of the exhaust pipe 5, the exhaust catalyst 100 can be fixed from the rear side. Furthermore, by fixing the exhaust catalyst 100 on the outside of the exhaust pipe 5 through the bracket structure 51, the exhaust catalyst 100 can be fixed from three positions simultaneously, which can improve the reliability and stability of fixing the exhaust catalyst 100.
[0068] It should be noted that, in the exhaust catalytic converter 100 of this utility model embodiment, when the exhaust system is operating normally, the temperature of the catalytic purification unit 12 is higher than the temperature of the phase change energy storage medium. The phase change energy storage medium can undergo a phase change to absorb the heat of the catalytic purification unit 12 and store it in the form of latent heat. When the temperature of the catalytic purification unit 12 is lower than the ignition temperature due to low temperature start-up, frequent start-stop, or power mode switching, the phase change energy storage medium can undergo a phase change to release the latent heat to the catalytic purification unit 12, so that the catalytic purification unit 12 can absorb heat to quickly reach the ignition temperature, effectively shortening the ignition time of the catalytic purification unit 12.
[0069] This utility model also proposes a vehicle.
[0070] The vehicle according to the embodiments of this utility model includes an exhaust catalytic converter 100 of any of the above embodiments. By providing a catalytic purification unit 12 in the generation chamber 111, harmful gases can be promoted to undergo oxidation-reduction reactions to be converted into harmless substances, reducing environmental pollution. Furthermore, by providing a phase change energy storage medium in the energy storage chamber 211, the phase change energy storage medium can exchange heat with the catalytic purification unit 12, releasing latent heat to heat the catalytic purification unit 12, enabling the catalytic purification unit 12 to quickly reach the ignition temperature, shortening the ignition time of the catalytic purification unit 12, and reducing the possibility of emissions exceeding standards due to low-temperature starts, frequent start-stops, or power mode switching. Moreover, by providing an elastic element 22, the movable baffle 212 can be moved to promote turbulence of the phase change energy storage medium, improving the heat exchange efficiency between the phase change energy storage medium and the catalytic purification unit 12.
[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0072] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. An exhaust gas catalytic converter, characterized in that, include: The aftertreatment purification unit assembly (1) includes a mounting housing (11) and a catalytic purification unit (12). A generation chamber (111) is formed inside the mounting housing (11), and the catalytic purification unit (12) is installed inside the generation chamber (111). The catalytic purification unit (12) is used to purify the exhaust gas. An energy storage component, comprising an energy storage housing (21) and a phase change energy storage medium, wherein the energy storage housing (21) is installed outside the mounting housing (11), and the phase change energy storage medium is disposed inside the energy storage housing (21) and is used to exchange heat with the catalytic purification unit (12).
2. The exhaust gas catalytic converter according to claim 1, characterized in that, The energy storage housing (21) has two energy storage cavities (211) formed inside, and at least one of the energy storage cavities (211) is provided with the phase change energy storage medium. The two energy storage cavities (211) are distributed sequentially in a direction away from the mounting housing (11).
3. The exhaust gas catalytic converter according to claim 2, characterized in that, The energy storage housing (21) has a movable partition (212) between the two energy storage cavities (211), and the movable partition (212) separates the two energy storage cavities (211); The movable partition (212) is configured to be movable in a direction away from or close to the mounting housing (11), and one of the two energy storage cavities (211) is provided with an elastic element (22) for elastically pre-tightening the position of the movable partition (212) relative to the mounting housing (11).
4. The exhaust catalyst according to claim 3, characterized in that, One of the two energy storage cavities (211) is an inner cavity (2111) and the other is an outer cavity (2112). The elastic element (22) is located in the inner cavity (2111), and the two ends of the elastic element (22) are respectively connected to the inner wall of the inner cavity (2111) and the movable partition (212).
5. The exhaust gas catalytic converter according to claim 3, characterized in that, There are multiple elastic elements (22), and the multiple elastic elements (22) are distributed in the energy storage cavity (211) at intervals along the length direction and / or width direction.
6. The exhaust catalyst according to claim 2, characterized in that, The energy storage housing (21) is constructed as an annular housing, and the energy storage cavity (211) is constructed as an annular cavity. The energy storage housing (21) is sleeved on the outside of the mounting housing (11), and the energy storage cavity (211) extends around the mounting housing (11).
7. The exhaust catalyst according to claim 1, characterized in that, An elastic buffer pad (112) is provided between the mounting housing (11) and the catalytic purification unit (12).
8. The exhaust gas catalytic converter according to claim 1, characterized in that, It also includes an air intake assembly (3) and an exhaust assembly (4), wherein the air intake assembly (3) is connected to the air intake end of the mounting housing (11) and the exhaust assembly (4) is connected to the air outlet end of the mounting housing (11).
9. The exhaust catalyst according to claim 8, characterized in that, The intake end assembly (3) is provided with an oxygen sensor base (31), which is used to install an oxygen sensor. And / or, it also includes an exhaust pipe (5) connected to the outlet end of the exhaust end assembly (4), the exhaust pipe (5) being fixedly connected to a bracket structure (51) for connecting to the vehicle body.
10. A vehicle, characterized in that, Includes the exhaust catalyst according to any one of claims 1-9.