Three-way catalytic converter, power system and vehicle

Abstract

The invention relates to a three-way catalytic converter, a power system and a vehicle, and belongs to the technical field of vehicle tail gas treatment. The three-way catalytic converter comprises a gas inlet part and a catalysis part, the gas inlet part comprises a gas inlet pipe and a partition plate, the partition plate is installed in the gas inlet pipe, the interior of the gas inlet pipe is divided into two gas inlet channels, the gas inlet pipe is communicated with the catalysis part, gas flowing through the two gas inlet channels can enter the catalysis part, and the catalysis part is communicated with the gas inlet pipe. And the catalysis part is used for purifying gas flowing through the interior of the catalysis part. According to the three-way catalytic converter, the power system and the vehicle, fluctuation of airflow in the three-way catalytic converter can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle exhaust treatment, and in particular to a three-way catalytic converter, a power system and a vehicle. Background Art

[0002] As a crucial component of a vehicle's engine powertrain, the three-way catalytic converter plays a crucial role in influencing vehicle power, fuel consumption, and emissions. Using a catalyst, the three-way catalytic converter converts CO, HC, and NOx in engine exhaust into harmless gases. However, when exhaust gases from multiple engine cylinders merge, they interfere with each other, causing significant airflow fluctuations and high backpressure in the three-way catalytic converter. This reduces engine fuel combustion efficiency and increases fuel consumption. Summary of the Invention

[0003] In view of this, the embodiments of the present disclosure provide a three-way catalytic converter, a power system, and a vehicle, which can reduce the fluctuation of airflow in the three-way catalytic converter. The technical solution is as follows:

[0004] In a first aspect, a three-way catalytic converter is provided, the three-way catalytic converter comprising an air intake portion and a catalytic portion, the air intake portion comprising an air intake pipe and a partition;

[0005] The partition is installed in the air intake pipe so that the interior of the air intake pipe is divided into two air intake channels;

[0006] The intake pipe is in communication with the catalytic unit, so that the gas flowing through the two intake passages can enter the catalytic unit;

[0007] The catalytic part is used to purify the gas flowing through the inside of the catalytic part.

[0008] In some possible implementations, the two air inlet channels are symmetrically located on both sides of the partition along radial cross-sections.

[0009] In some possible implementations, the air inlet pipe includes an air inlet end and an air outlet end;

[0010] The partition is installed at the air inlet end, so that the air inlet end is divided into two air inlet channels;

[0011] The first end of the air outlet is communicated with the air inlet, and the second end is communicated with the catalytic portion, so that the air flowing through the two inlet channels can enter the catalytic portion via the air outlet.

[0012] In some possible implementations, the second end of the gas outlet is conical, and the end with a larger diameter is connected to the catalytic part.

[0013] In some possible implementations, the catalytic portion includes a catalytic tube and a carrier;

[0014] One end of the catalytic tube body is connected to the air intake pipe;

[0015] The carrier is installed in the catalytic tube body, and the diameter of the carrier matches the inner diameter of the catalytic tube body, so that the gas entering the catalytic tube body can flow through the carrier and be purified;

[0016] Preferably, the catalytic portion includes two carriers, and the two carriers are spaced apart and distributed along the length direction of the catalytic tube body;

[0017] Preferably, the spacing distance between the two carriers is 24 mm to 26 mm.

[0018] In some possible implementations, a rear oxygen sensor mounting seat is provided on the side wall of the catalytic tube body, and the rear oxygen sensor mounting seat is used to mount a rear oxygen sensor;

[0019] Preferably, when there are two carriers, the rear oxygen sensor mounting seat is located between the two carriers in the length direction of the catalytic tube.

[0020] In some possible implementations, a front oxygen sensor mounting seat is provided on the side wall of the intake pipe, and the front oxygen sensor mounting seat is suitable for mounting a front oxygen sensor;

[0021] Preferably, when the intake pipe includes an intake end and an outlet end, the front oxygen sensor mounting seat is located at the outlet end.

[0022] In some possible implementations, the three-way catalytic converter further includes an exhaust gas recirculation (EGR) connecting pipe, wherein the EGR connecting pipe is used to connect the intake pipe to an intake pipe of an EGR system of a vehicle engine;

[0023] Preferably, when the intake pipe includes an intake end and an outlet end, the first end of the EGR connecting pipe is communicated with the outlet end.

[0024] In a second aspect, a power system is provided, comprising the three-way catalytic converter described in any one of the first aspects.

[0025] In a third aspect, a vehicle is provided, comprising the three-way catalytic converter described in any one of the first aspect, or the power system described in the second aspect.

[0026] In the solution disclosed herein, a partition divides the intake pipe into two parallel intake channels. These two intake channels can be connected to different exhaust manifolds of the engine, preventing exhaust gases from merging before entering the three-way catalytic converter. Exhaust gases from these different exhaust manifolds will not merge until they exit the two intake channels and enter the catalytic converter for purification.

[0027] Since the airflows in the two intake channels are parallel when they intersect, the impact force between the two airflows can be reduced. As a result, the airflow fluctuations generated after entering the three-way catalytic converter can be greatly reduced, thereby reducing the back pressure in the three-way catalytic converter.

[0028] At the same time, it also delays the time when the airflows from different exhaust manifolds converge, which is beneficial to reducing the energy loss of exhaust gas flowing from the exhaust manifold to the three-way catalytic converter, making the exhaust gas temperature entering the three-way catalytic converter higher, thereby shortening the cold start time of the engine.

[0029] Moreover, it also makes the airflow entering the three-way catalytic converter more uniform, which is beneficial to improving the purification efficiency of exhaust gas, avoiding local sintering and cracking of the carrier inside the catalytic part, and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 1 is a schematic structural diagram of an intake portion of a three-way catalytic converter provided by an embodiment of the present disclosure;

[0032] Figure 2 is a structural schematic diagram of a three-way catalytic converter provided by an embodiment of the present disclosure;

[0033] Figure 3 is a schematic cross-sectional view of a three-way catalytic converter provided by an embodiment of the present disclosure;

[0034] Figure 4 It is a schematic diagram of the cross-sectional structure of an EGR connecting pipe provided in an embodiment of the present disclosure.

[0035] Description of Reference Numerals

[0036] 1. Intake part; 11. Intake pipe; 110. Intake channel; 111. Intake end; 112. Outlet end; 12. Partition; 13. Mounting flange; 131. Mounting hole; 2. Catalytic unit; 21. Catalytic tube body; 22. Carrier; 221. Gasket; 23. Mounting bracket; 3. Rear oxygen sensor mounting base; 4. Front oxygen sensor mounting base; 5. EGR connecting pipe; 6. Outlet pipe; 7. Thermal insulation component; 71. Thermal insulation cotton; 72. Thermal insulation cover. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0038] In the first aspect, this embodiment relates to a three-way catalytic converter, referring to Figure 1 and Figure 2 As shown, the three-way catalytic converter includes an intake portion 1 and a catalytic portion 2. Figure 1 As shown, the air intake portion 1 includes an air intake pipe 11 and a partition 12. The partition 12 and the air intake pipe 11 can be integrally cast. For example, the partition 12 and the air intake pipe 11 can be integrally cast by SUS304 material.

[0039] Continue to refer Figure 1 As shown, the partition 12 is installed in the intake pipe 11, so that the interior of the intake pipe 11 is divided into two intake channels 110. The two intake channels 110 can be parallel and can be connected to different exhaust manifolds of the engine respectively.

[0040] refer to Figure 3 As shown, the intake pipe 11 is in communication with the catalyst portion 2 , so that the gas flowing through the two intake passages 110 can enter the catalyst portion 2 .

[0041] For example, the intake unit 1 may further include a sealing flange 13, which may be mounted on a first end of the intake pipe 11. The second end of the intake pipe 11 may be in communication with the catalyst unit 2. The sealing flange 13 may have two through-holes, corresponding to the two intake channels 110. The sealing flange 13 allows the two intake channels 110 to communicate with the two exhaust manifolds, ensuring a tight seal between the two intake channels 110 and the two exhaust manifolds. The sealing flange 13 may be welded to the intake pipe 11.

[0042] The catalytic unit 2 is used to purify the gas flowing through the catalytic unit 2. For example, the catalytic unit 2 may have a catalyst therein, and the exhaust gas flowing into the catalytic unit 2 may be purified by the catalyst.

[0043] As can be seen from the above, the partition 12 separates the intake pipe 11 into two parallel intake passages 110. These two intake passages 110 can be connected to different exhaust manifolds of the engine, preventing exhaust gases from entering the three-way catalytic converter from intersecting. Exhaust gases do not intersect until they exit the two intake passages 110 and enter the catalyst unit 2 for purification.

[0044] Since the airflows in the two intake channels 110 are parallel when they meet, the impact force between the two airflows can be reduced. Thus, the airflow fluctuations generated after entering the three-way catalytic converter can be greatly reduced, thereby reducing the back pressure in the three-way catalytic converter.

[0045] At the same time, it also delays the time when the airflows from different exhaust manifolds converge, which is beneficial to reducing the energy loss of exhaust gas flowing from the exhaust manifold to the three-way catalytic converter, making the exhaust gas temperature entering the three-way catalytic converter higher, thereby shortening the cold start time of the engine.

[0046] Moreover, the airflow entering the three-way catalytic converter is made more uniform, which is beneficial to improving the purification efficiency of the exhaust gas, avoiding local sintering and cracking of the carrier 22 inside the catalytic part 2, and extending the service life.

[0047] In some possible implementations, multiple mounting holes 131 may be provided around the sealing flange 13 and around the two exhaust manifolds, respectively. The air intake portion 1 may further include multiple fixing members. The fixing members may be rod-shaped and may sequentially pass through a mounting hole 131 in the sealing flange 13 and a mounting hole 131 around the exhaust manifolds. Thus, the multiple fixing members may achieve a fixed connection between the sealing flange 13 and the exhaust manifolds.

[0048] In one example, the fixing member can be a bolt. For example, the nut on the first end of the bolt can abut against the sealing flange 13. The second end of the bolt can be sequentially passed through the mounting hole 131 of the sealing flange 13 and the mounting holes 131 around the exhaust manifold. The nut is then screwed onto the second end of the bolt and abuts against the exhaust manifold. Thus, a fixed connection between the sealing flange 13 and the exhaust manifold can be achieved using multiple bolts.

[0049] In another example, the fixing member can be a pin. The first end of the pin has a pin cap that can abut against the sealing flange 13. The second end of the pin can sequentially seal the mounting hole 131 of the flange 13 and the mounting holes 131 around the exhaust manifold, and then be riveted to the exhaust manifold. Thus, a fixed connection between the sealing flange 13 and the exhaust manifold can be achieved through multiple pins.

[0050] In another example, the fixing member can be a screw, the first end of the screw has a screw cap that can abut against the sealing flange 13, and the second end of the screw can pass through the mounting hole 131 of the sealing flange 13 and be screwed into the mounting hole 131 around the exhaust manifold, wherein the mounting hole 131 around the exhaust manifold is a screw hole.

[0051] In some possible implementations, reference Figure 1 Combined with Figure 3 As shown, the two air inlet passages 110 are symmetrically located on either side of the partition 12 along the radial cross-section. Thus, the flow areas of the two air inlet passages 110 are substantially the same, thereby making the airflow entering the catalyst section 2 more uniform, reducing the impact force on the catalyst section 2, and facilitating the improvement of the service life of the catalyst section 2.

[0052] In some possible implementations, reference Figure 3 As shown, the intake duct 11 can be curved. The inner wall of the intake duct 11 has a smooth transition, and the partition 12 extends along the extension direction of the intake duct 11. In this way, the curved intake duct 11 can adapt to the complex layout of the vehicle interior. Furthermore, the smooth transition of the inner wall of the intake duct 11 helps reduce airflow fluctuations within the intake duct 11.

[0053] In some possible implementations, reference Figure 3 As shown, the air inlet pipe 11 includes an air inlet end 111 and an air outlet end 112 . A partition plate 12 is installed at the air inlet end 111 , so that the air inlet end 111 is divided into two air inlet channels 110 .

[0054] Continue to refer Figure 3 As shown, the first end of the outlet end 112 is connected to the inlet end 111 , and the second end of the outlet end 112 is connected to the catalytic portion 2 , so that the air flowing through the two inlet channels 110 can enter the catalytic portion 2 through the outlet end 112 .

[0055] In this way, the airflow entering the two intake channels 110 from different exhaust manifolds can first enter the outlet end 112 and merge together, and then enter the catalyst part 2, which is conducive to making the airflow entering the catalyst part 2 more uniform, thereby reducing the impact force on the catalyst part 2 and helping to increase the service life of the catalyst part 2.

[0056] In some possible implementations, continue to refer to Figure 3 As shown, the second end of the gas outlet end 112 is conical, and the end with a larger diameter is connected to the catalytic part 2.

[0057] In this way, when the airflow enters the catalyst section 2 from the outlet end 112, the speed can be reduced, and the kinetic energy can be converted into pressure energy, so that the airflow can not only be smoothly diffused from the smaller pipe diameter to the entire range inside the catalyst section 2, but also the impact force of the airflow on the catalyst section 2 is reduced, thereby improving the service life of the catalyst section 2.

[0058] At the same time, it can also make the airflow inside the entire catalytic unit 2 flow more evenly, increase the contact range between the exhaust gas and the catalyst inside the catalytic unit 2, and thus help improve the purification effect of the catalytic unit 2 on the exhaust gas.

[0059] In some possible implementations, reference Figure 3 As shown, the catalyst section 2 includes a catalyst tube body 21 and a carrier 22. One end of the catalyst tube body 21 is connected to the intake pipe 11, so that exhaust gas entering the intake pipe 11 from the exhaust manifold can flow into the catalyst tube body 21 from one end and then flow out from the other end of the catalyst tube body 21. For example, a first end of the catalyst tube body 21 can be welded to the intake pipe 11, and the other end of the catalyst tube body 21 can be welded to the outlet pipe 6. Exhaust gas can enter the catalyst tube body 21 from the intake pipe 11 and then flow out of the catalyst tube body 21 from the outlet pipe 6.

[0060] Continue to refer Figure 3 As shown, the carrier 22 is installed in the catalytic tube 21 , and the diameter of the carrier 22 matches the inner diameter of the catalytic tube 21 , so that the gas entering the catalytic tube 21 can flow through the carrier 22 and be purified.

[0061] Typically, the substrate 22 may be a honeycomb structure made of aluminum oxide or ceramic. A catalyst is coated on the inner walls of the fine ventilation ducts of the substrate 22. This catalyst converts harmful gases such as CO, HC, and NOx in the engine exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction, thereby purifying the engine exhaust. The catalyst coating may be composed of precious metals and their compounds, such as platinum (Pt), rhodium (Rh), palladium (Pd), a co-catalyst (Cerium O2), an oxidation catalyst (γ-Al2O3), and aluminum oxide.

[0062] For example, the carrier 22 may be wrapped around a gasket 221, and the carrier 22 and the gasket 221 may form an interference fit with the inner wall of the catalytic tube 21. Thus, the carrier 22 may be installed in the catalytic tube 21 through the squeezing force and friction between the catalytic tube 21 and the gasket 221. Furthermore, the gasket 221 may also provide shockproof protection for the carrier 22, thereby preventing damage to the carrier 22 and increasing the service life of the carrier 22.

[0063] The gasket 221 may be an elastic sealing gasket formed by integrating a ceramic fiber gasket with high temperature durability and vermiculite with high temperature expansion, or may be a sealing gasket made of ceramic fiber material.

[0064] It should be noted that the matching of the diameter of the carrier 22 and the inner diameter of the catalytic tube 21 may mean that the diameter of the carrier 22 and the liner 221 as a whole may be exactly equal to or slightly larger than the inner diameter of the catalytic tube 21 .

[0065] In this way, the exhaust gas flowing into the catalytic tube body 21 must flow through the carrier 22 before it can flow out of the catalytic tube body 21, thereby achieving effective purification of the exhaust gas. Moreover, when the exhaust gas enters the catalytic tube body 21 and is distributed more evenly, the contact area between the exhaust gas and the carrier 22 is larger, and the purification efficiency can be higher.

[0066] In some possible embodiments, since the catalyst on the carrier 22 generally requires a sufficiently elevated temperature to be effective, the catalytic portion 2 includes two carriers 22, which are spaced apart along the length of the catalytic tube 21. For example, the carrier 22 closest to the intake pipe 11 may be a front carrier, and the other carrier 22 may be a rear carrier.

[0067] This allows the front carrier to heat up faster and take effect more quickly. This shortens the engine's cold start time, allowing for faster oil circulation and reducing wear between engine components. It also improves starting efficiency, saves energy, and reduces pollutant emissions.

[0068] In some possible implementations, the distance between the two carriers 22 is 24 mm to 26 mm. For example, the distance between the two carriers 22 can be 24 mm, 25 mm, or 26 mm.

[0069] In some possible implementations, reference Figure 2 As shown, a rear oxygen sensor mounting base 3 is provided on the side wall of the catalytic tube body 21. The rear oxygen sensor mounting base 3 is used to mount a rear oxygen sensor. The rear oxygen sensor can monitor the exhaust gas purification efficiency of the substrate 22 by detecting the oxygen content in the exhaust gas, and further detect whether the substrate 22 is malfunctioning.

[0070] In some possible implementations, when there are two carriers 22, the rear oxygen sensor mounting base 3 is located between the two carriers 22 along the length of the catalytic tube 21. In this way, the rear oxygen sensor can detect exhaust gas that flows through the front carrier without coming into contact with the rear carrier, thereby monitoring whether the front carrier has malfunctioned.

[0071] In some possible implementations, reference Figure 2As shown, a front oxygen sensor mounting base 4 is provided on the side wall of the intake pipe 11. This mounting base 4 is suitable for mounting a front oxygen sensor. This front oxygen sensor monitors the oxygen content of the exhaust gas flowing through the intake pipe 11 and transmits this information to the engine control unit (ECU), enabling real-time adjustment of the fuel injection quantity to ensure the engine operates near the ideal air-fuel ratio, thereby optimizing combustion efficiency and reducing emissions. If the oxygen content in the exhaust gas is high, indicating a lean mixture, the front oxygen sensor transmits this information to the ECU, which instructs the injector to increase the fuel injection quantity. If the oxygen content in the exhaust gas is low, indicating a rich mixture, the ECU instructs the injector to reduce the fuel injection quantity.

[0072] Furthermore, the damage of the carrier 22 can be determined by comparing the monitoring results of the front oxygen sensor and the rear oxygen sensor. For example, if the oxygen content detected by the front oxygen sensor and the rear oxygen sensor is the same, it indicates that the carrier 22 has a fault.

[0073] In some possible implementations, reference Figure 2 Combined with Figure 3 As shown, when the intake pipe 11 includes an intake end 111 and an outlet end 112, the front oxygen sensor mounting base 4 is located at the outlet end 112. In this way, the front oxygen sensor can detect the oxygen content of the exhaust gas after mixing at the outlet end 112, and the detected result can be more accurate.

[0074] In some possible embodiments, the three-way catalytic converter further includes an exhaust gas recirculation (EGR) connection pipe 5, which connects the intake pipe 11 to the intake line of the vehicle engine's EGR system. For example, one end of the EGR connection pipe 5 can be welded to the intake pipe 11, while the other end can be flanged to the intake line of the EGR system. This allows a portion of the engine exhaust gas to be diverted through the EGR connection pipe 5 into the EGR system before entering the catalyst unit 2, thereby reducing the purification burden on the catalyst unit 2 and improving its service life.

[0075] In some possible embodiments, when the intake pipe 11 includes an intake end 111 and an outlet end 112, the first end of the EGR connecting pipe 5 is connected to the outlet end 112. In this way, the exhaust gases that meet at the outlet end 112 can be simultaneously introduced into the EGR connecting pipe 5, which helps to avoid excessive fluctuations in the airflow after the meeting due to a large difference in the amount of gas flowing out of the two intake channels 111.

[0076] In some possible embodiments, the three-way catalytic converter further includes a mounting bracket 23, one end of which can be welded to the catalytic tube body 21, and the other end can be fixed to the vehicle by bolts, clamping, etc., thereby enabling the three-way catalytic converter to be fixed to the vehicle.

[0077] In some possible implementations, reference Figure 3 and Figure 4 As shown, the three-way catalytic converter further includes a heat insulation component 7, which can be wrapped around at least one of the intake pipe 11, the EGR connecting pipe 6, the catalytic tube body 21, and the outlet pipe 6. The heat insulation component 7 helps prevent heat loss from the three-way catalytic converter, thereby helping to shorten the cold start time of the engine.

[0078] In some possible implementations, continue to refer to Figure 3 and Figure 4 As shown, the heat insulation assembly 7 may include heat insulation cotton 71 and a heat insulation cover 72. The heat insulation cotton 71 may be wrapped around at least one of the intake pipe 11, the EGR connecting pipe 6, the catalytic tube body 21, and the outlet pipe 6, and the heat insulation cover 72 may be wrapped around the heat insulation cotton 71. Thus, the heat insulation cotton 71 can effectively prevent heat leakage from the three-way catalytic converter. The heat insulation cover 72 not only further prevents heat leakage from the three-way catalytic converter, but also protects the three-way catalytic converter and the heat insulation cotton 71, preventing damage to the three-way catalytic converter and the heat insulation cotton 71.

[0079] In the disclosed embodiment, the partition 12 separates the intake pipe 11 into two parallel intake passages 110. The two intake passages 110 can be connected to different exhaust manifolds of the engine, preventing exhaust gases from entering the three-way catalytic converter from intersecting. Exhaust gases do not intersect until they exit the two intake passages 110 and enter the catalyst unit 2 for purification.

[0080] Since the airflows in the two intake channels 110 are parallel when they meet, the impact force between the two airflows can be reduced. Thus, the airflow fluctuations generated after entering the three-way catalytic converter can be greatly reduced, thereby reducing the back pressure in the three-way catalytic converter.

[0081] At the same time, it also delays the time when the airflows from different exhaust manifolds converge, which is beneficial to reducing the energy loss of exhaust gas flowing from the exhaust manifold to the three-way catalytic converter, making the exhaust gas temperature entering the three-way catalytic converter higher, thereby shortening the cold start time of the engine.

[0082] Moreover, the airflow entering the three-way catalytic converter is made more uniform, which is beneficial to improving the purification efficiency of the exhaust gas, avoiding local sintering and cracking of the carrier 22 inside the catalytic part 2, and extending the service life.

[0083] In a second aspect, a power system is provided, the power system comprising any three-way catalytic converter according to the first aspect.

[0084] In the disclosed embodiment, the partition 12 separates the intake pipe 11 into two parallel intake passages 110. The two intake passages 110 can be connected to different exhaust manifolds of the engine, preventing exhaust gases from entering the three-way catalytic converter from intersecting. Exhaust gases do not intersect until they exit the two intake passages 110 and enter the catalyst unit 2 for purification.

[0085] Since the airflows in the two intake channels 110 are parallel when they meet, the impact force between the two airflows can be reduced. Thus, the airflow fluctuations generated after entering the three-way catalytic converter can be greatly reduced, thereby reducing the back pressure in the three-way catalytic converter.

[0086] At the same time, it also delays the time when the airflows from different exhaust manifolds converge, which is beneficial to reducing the energy loss of exhaust gas flowing from the exhaust manifold to the three-way catalytic converter, making the exhaust gas temperature entering the three-way catalytic converter higher, thereby shortening the cold start time of the engine.

[0087] Moreover, the airflow entering the three-way catalytic converter is made more uniform, which is beneficial to improving the purification efficiency of the exhaust gas, avoiding local sintering and cracking of the carrier 22 inside the catalytic part 2, and extending the service life.

[0088] In a third aspect, a vehicle is provided, comprising any three-way catalytic converter according to the first aspect, or the power system according to the second aspect.

[0089] In the disclosed embodiment, the partition 12 separates the intake pipe 11 into two parallel intake passages 110. The two intake passages 110 can be connected to different exhaust manifolds of the engine, preventing exhaust gases from entering the three-way catalytic converter from intersecting. Exhaust gases do not intersect until they exit the two intake passages 110 and enter the catalyst unit 2 for purification.

[0090] Since the airflows in the two intake channels 110 are parallel when they meet, the impact force between the two airflows can be reduced. Thus, the airflow fluctuations generated after entering the three-way catalytic converter can be greatly reduced, thereby reducing the back pressure in the three-way catalytic converter.

[0091] At the same time, it also delays the time when the airflows from different exhaust manifolds converge, which is beneficial to reducing the energy loss of exhaust gas flowing from the exhaust manifold to the three-way catalytic converter, making the exhaust gas temperature entering the three-way catalytic converter higher, thereby shortening the cold start time of the engine.

[0092] Moreover, the airflow entering the three-way catalytic converter is made more uniform, which is beneficial to improving the purification efficiency of the exhaust gas, avoiding local sintering and cracking of the carrier 22 inside the catalytic part 2, and extending the service life.

[0093] It should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0094] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0095] In the description of this specification, reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application.

[0096] The above are merely embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A three-way catalytic converter, characterized in that: The three-way catalytic converter comprises an air intake portion (1) and a catalytic portion (2), wherein the air intake portion (1) comprises an air intake pipe (11) and a partition plate (12); The partition plate (12) is installed in the air intake pipe (11), so that the interior of the air intake pipe (11) is divided into two air intake channels (110); The air intake pipe (11) is in communication with the catalytic portion (2), so that the gas flowing through the two air intake channels (110) can enter the catalytic portion (2); The catalytic part (2) is used to purify the gas flowing through the interior of the catalytic part (2).

2. The three-way catalytic converter according to claim 1, characterized in that: The two air inlet channels (110) are symmetrically located on both sides of the partition plate (12) along radial cross-sections.

3. The three-way catalytic converter according to claim 1, characterized in that: The air inlet pipe (11) comprises an air inlet end (111) and an air outlet end (112); The partition plate (12) is installed at the air inlet end (111), so that the air inlet end (111) is divided into two air inlet channels (110); The first end of the air outlet (112) is in communication with the air inlet (111), and the second end is in communication with the catalytic portion (2), so that air flowing through the two air inlet channels (110) can enter the catalytic portion (2) via the air outlet (112).

4. The three-way catalytic converter according to claim 3, characterized in that: The second end of the gas outlet end (112) is conical, and the end with a larger diameter is connected to the catalytic part (2).

5. The three-way catalytic converter according to any one of claims 1 to 4, characterized in that: The catalytic part (2) includes a catalytic tube (21) and a carrier (22); One end of the catalytic tube body (21) is in communication with the air intake pipe (11); The carrier (22) is installed in the catalytic tube (21), and the diameter of the carrier (22) matches the inner diameter of the catalytic tube (21), so that the gas entering the catalytic tube (21) can flow through the carrier (22) and be purified; Preferably, the catalytic portion (2) comprises two carriers (22), and the two carriers (22) are spaced apart and distributed along the length direction of the catalytic tube (21); Preferably, the spacing distance between the two carriers (22) is 24 mm to 26 mm.

6. The three-way catalytic converter according to claim 5, characterized in that: A rear oxygen sensor mounting seat (3) is provided on the side wall of the catalytic tube body (21), and the rear oxygen sensor mounting seat (3) is used to mount the rear oxygen sensor; Preferably, when the number of the carriers (22) is two, the rear oxygen sensor mounting seat (3) is located between the two carriers (22) in the length direction of the catalytic tube (21).

7. The three-way catalytic converter according to any one of claims 1 to 6, characterized in that: A front oxygen sensor mounting seat (4) is provided on the side wall of the intake pipe (11), and the front oxygen sensor mounting seat (4) is suitable for mounting a front oxygen sensor; Preferably, when the intake pipe (11) comprises an intake end (111) and an outlet end (112), the front oxygen sensor mounting seat (4) is located at the outlet end (112).

8. The three-way catalytic converter according to any one of claims 1 to 4, characterized in that: The three-way catalytic converter further comprises an exhaust gas recirculation (EGR) connecting pipe (5), wherein the EGR connecting pipe (5) is used to connect the intake pipe (11) with the intake pipe of the EGR system of the vehicle engine; Preferably, when the intake pipe (11) includes an intake end (111) and an outlet end (112), the first end of the EGR connecting pipe (5) is in communication with the outlet end (112).

9. A power system, characterized in that: The power system includes the three-way catalytic converter according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle includes the three-way catalytic converter according to any one of claims 1 to 8, or the power system according to claim 9.

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