Noise reduction type three-way catalyst assembly

Abstract

The invention relates to the technical field of three-way catalytic converters, in particular to a noise reduction type three-way catalytic converter assembly which comprises a shell, an air inlet formed in the upper end of the shell and an exhaust port formed in the lower end of the shell and further comprises an inner cavity, a gasket, a catalyst carrier, a guide-in assembly, a guide assembly and a reserved cavity plate. And the catalyst carrier is mounted in the inner chamber. Tail gas is introduced into the reserved cavity through the introduction assembly, so that the tail gas stays for a short time before the temperature of the catalyst carrier is increased, a channel between the reserved cavity and the catalyst carrier is opened along with the increase of the pressure of the tail gas, and the tail gas escapes in an S-shaped path and reacts with a catalyst coating; the tail gas flowing path is changed through swinging of the movable flow guide plate, the contact area of the tail gas and the catalyst coating is increased, the gap between the guide plate and the U-shaped positioning plate is pushed and pressed to form the S-shaped flowing path again, and it is ensured that the tail gas is exhausted from the exhaust port after being fully purified.

Description

Technical Field

[0001] The invention relates to the technical field of three-way catalytic converters, in particular to a noise reduction type three-way catalytic converter assembly. Background Art

[0002] The three-way catalytic converter is the most important off-board purification device installed in the automobile exhaust system. It can convert harmful gases such as CO, HC and NOx emitted from automobile exhaust into harmless carbon dioxide, water and nitrogen through oxidation and reduction. This catalyst can convert the three main harmful substances in the exhaust gas into harmless substances, so it is called a three-way catalytic converter. The three-way catalytic converter contains a porous ceramic carrier covered with a layer of precious metals such as platinum, rhodium, palladium and rare earth coating as a catalyst. When the high-temperature automobile exhaust passes through the purification device, these catalysts will accelerate the oxidation-reduction chemical reaction of harmful gases in the exhaust gas, thereby converting them into harmless carbon dioxide, water and nitrogen.

[0003] The three-way catalytic converter can only work at 350℃. When the temperature is too low, the conversion efficiency will drop sharply. The active temperature of the three-way catalytic converter is 400℃-800℃. Too high a temperature will aggravate the aging of the catalyst. When the engine is cold started, the catalytic efficiency will be significantly reduced because the catalyst has not yet reached its normal operating temperature. During this period, the three-way catalytic converter cannot effectively convert harmful substances in the exhaust gas, resulting in temporary failure. In order to solve this problem, a variety of means can be used to effectively shorten the engine's ignition time. First, a special fuel injection technology is used, such as direct injection in the cylinder, which directly injects fuel into the cylinder to improve the quality of fuel atomization and ensure that the mixture burns quickly at low temperatures. Second, by enhancing the ignition energy and accurately controlling the ignition timing, the spark plug can be reliably ignited in a low temperature environment to accelerate the combustion process of the mixture. At the same time, the engine and its components are preheated using devices such as glow plugs and intake preheaters to increase the internal temperature of the engine and reduce the starting resistance to shorten the ignition time.

[0004] Although the direct injection technology improves the quality of fuel atomization, during the cold start phase, due to the low engine temperature, the fuel cannot be completely burned, and more fuel needs to be injected to compensate for the impact of low temperature on combustion efficiency, which increases fuel consumption and leads to an increase in harmful substances in the exhaust gas; preheating the engine and its components with the help of glow plugs, intake preheaters or other heating devices also consumes a lot of electricity. In the case of low temperature or insufficient power supply, the heating effect cannot be effectively maintained. No matter which method is used, it consumes the energy consumption of the car itself to shorten the engine ignition time. In addition, the lubrication effect between the engine components is poor during the cold start phase, and the friction resistance is large. At this time, frequent ignition and fuel injection will cause additional impact and wear on the engine, shortening the service life of the engine, which is not worth the loss.

[0005] Therefore, a noise reduction three-way catalytic converter assembly is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a noise-reducing three-way catalytic converter assembly. In order to solve the problem that although fuel atomization can be improved by technology during the cold start stage, it will increase fuel consumption, emit harmful substances, and require additional energy for preheating, the gas during the cold start stage stays briefly in the reserved cavity plate, then opens the channel to react with the catalyst and is discharged, and the gas during the driving stage directly reacts and is discharged from the exhaust port.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A noise reduction three-way catalytic converter assembly, comprising a shell, an air inlet installed at the upper end of the shell, and an exhaust port arranged at the lower end of the shell, and also comprising an inner chamber, a gasket, a catalyst carrier, an introduction component, a guide component, and a reserved cavity plate, wherein the inner chamber is opened inside the shell, the catalyst carrier is installed inside the inner chamber, the catalyst carrier is a honeycomb structure, the gasket is located between the shell and the catalyst carrier, the reserved cavity plate is arranged on the cavity wall of the inner chamber, the introduction component is installed at the upper end of the reserved cavity plate, and the guide component is embedded and installed from top to bottom At the left and right side ends of the catalyst carrier, and one end of the guide assembly extends to the inner side of the reserved cavity plate, the catalyst carrier is filled between the gasket, the reserved cavity plate and the guide assembly, and the catalyst carrier is located at the lower end of the introduction assembly, and the gas enters the inner chamber along the air inlet. The gas in the cold start stage enters the inner side of the reserved cavity plate from the middle position of the introduction assembly, and gradually escapes from both sides into the catalyst carrier after being filled, and is discharged from the exhaust port position after purification. The gas in the driving stage completes the purification reaction with the catalyst carrier from the two sides of the introduction assembly and is discharged from the exhaust port position.

[0009] It can be seen from the above scheme that: by designing the reserved cavity plate, the introduction component and the guide component, the gas flow path is optimized, the gas is effectively distributed to the catalyst carrier during the cold start phase, and the purification efficiency is improved. At the same time, the contact area between the gas and the catalyst is increased during the driving phase, and the purification process is accelerated. Compared with the existing technology, this assembly not only improves the purification effect, but also realizes the noise reduction function and enhances the overall performance of the catalyst.

[0010] Preferably, matching grooves are evenly formed on both side ends of the catalyst carrier, the matching grooves match the guide assembly, and the upper surface of the catalyst carrier and the concave bottom surface of the catalyst carrier are both provided with a catalyst coating.

[0011] From the above scheme, it can be seen that the matching grooves opened on both sides of the catalyst carrier match the guide assembly, ensuring the precise positioning and stable installation of the guide assembly. At the same time, the catalyst coating is set on the upper surface and the concave bottom surface of the catalyst carrier, maximizing the use of the carrier surface area and improving the catalytic conversion efficiency. Compared with the existing technology, this design not only enhances the stability of the catalyst structure, but also significantly improves the exhaust gas purification performance, achieving more efficient catalytic conversion and lower emissions.

[0012] Preferably, the introduction component includes a positioning column, an arc-shaped movable strip, a movable guide plate 1, a movable guide plate 2 and a fitting column, the two ends of the positioning column are installed on the cavity wall surface of the inner chamber, the arc-shaped movable strip is arranged on the circumferential surface of the positioning column, the movable guide plate 1 is installed on one side end of the arc-shaped movable strip, one end of the movable guide plate 1 is fitted with the cavity wall of the inner chamber, the movable guide plate 2 is arranged on the other side end of the arc-shaped movable strip, the fitting column is installed at the end of the movable guide plate 2, and the fitting column is fitted with the inner wall of the reserved cavity plate.

[0013] From the above scheme, it can be seen that the flexible regulation and efficient introduction of gas flow are achieved through the sophisticated design of the positioning column, the arc-shaped movable strip, the movable guide plate 1, the movable guide plate 2 and the fitting strip. Compared with the existing technology, this design not only improves the contact efficiency between the gas and the catalyst carrier during the cold start and driving stages, but also enhances the uniformity of gas distribution through the synergistic effect of the arc-shaped movable strip and the movable guide plate, thereby optimizing the catalytic conversion process and improving the exhaust gas purification efficiency and the overall performance of the catalyst.

[0014] Preferably, a fixed guide plate is installed on the side surface of the positioning column, the two fixed guide plates are positioned opposite to each other, and the two fixed guide plates are of different lengths, and a gas flow gap is provided at the docking position of the two fixed guide plates.

[0015] From the above scheme, it can be seen that by installing relatively fixed guide plates of different lengths on the side surface of the positioning column and setting a gas flow gap at the docking position, the gas flow path is further optimized, so that the gas can be distributed to the catalyst carrier more smoothly and evenly. Compared with the existing technology, this design not only increases the contact area and contact time between the gas and the catalyst coating, but also promotes the efficient conversion of the gas during the cold start and driving stages, thereby significantly improving the purification efficiency and overall performance of the catalyst.

[0016] Preferably, the guide assembly includes a U-shaped positioning plate, a pushing guide plate, an extended upper groove and an inner through groove, the U-shaped positioning plate is installed in the matching groove, the pushing guide plate is arranged on the inner side of the U-shaped positioning plate, the extended upper groove is opened on the upper surface of the pushing guide plate, the two inner side walls of the U-shaped positioning plate are opened with side sliding grooves, the inside of the side sliding grooves is provided with connecting springs, matching sliders are installed on both side ends of the pushing guide plate, the matching sliders match the side sliding grooves, one end of the connecting spring is connected to the matching slider, and the inner through groove runs through the inner surface of the extended upper groove opened in the middle position.

[0017] From the above scheme, it can be seen that the ingenious design of the U-shaped positioning plate, the push guide plate, the extended upper slot and the inner through slot, combined with the interaction between the connecting spring in the side slide slot and the matching slider, achieves precise guidance and pressure response of gas flow. Compared with the existing technology, this design not only enhances the catalyst's ability to regulate gas distribution during the cold start phase, but also improves the contact efficiency between the gas and the catalyst coating during the driving phase.

[0018] Preferably, the length of the pushing guide plate at the middle position is shorter than that of the pushing guide plates at the upper and lower positions, and the concave thickness of the U-shaped positioning plate at the middle position is greater than that of the U-shaped positioning plates at the upper and lower positions.

[0019] From the above scheme, it can be seen that by designing the push guide plate in the middle position to be shorter than that in the upper and lower positions, and the concave thickness of the U-shaped positioning plate in the middle position to be greater than that in the upper and lower positions, the gas flow is further optimized and guided. This design enhances the uniformity of gas distribution in the catalyst carrier while maintaining structural stability, especially in the cold start stage, and can more effectively open the connection channel between the reserved cavity plate and the catalyst carrier.

[0020] Preferably, the gap between the pushing guide plate and the U-shaped positioning plate at the middle position is smaller than the gaps between the pushing guide plate and the U-shaped positioning plate at the upper and lower positions, and the catalyst coating is arranged on the surface of the matching groove corresponding to the lower end of each gap.

[0021] From the above scheme, it can be seen that by reducing the gap between the push guide plate and the U-shaped positioning plate in the middle position, the centralized guidance and pressure response capabilities of the gas in this area are enhanced compared with the upper and lower positions. This design not only optimizes the distribution of gas in the catalyst carrier, but also improves the contact efficiency between the gas and the catalyst coating disposed on the surface of the corresponding matching groove at the lower end of each gap, thereby further improving the catalytic conversion efficiency and exhaust gas purification performance of the catalyst.

[0022] Preferably, the reserved cavity plate includes a reserved cavity, an inner slope, a matching groove, a bottom sealing plate, a connecting thin rod and a triangular support block, the two side ends of the reserved cavity are installed on the cavity wall of the inner cavity, the inner slope is arranged on the inner surface of the bottom end of the reserved cavity, the matching grooves are evenly arranged on the surface of the reserved cavity, the matching grooves correspond to the matching grooves, the matching grooves are matched with the U-shaped positioning plate and the pushing guide plate, the bottom sealing plate is arranged on the inner side of the two inner slopes, and the two side ends of the bottom sealing plate are matched with the slope surface of the inner slope, the connecting thin rod is installed in the center of the upper surface of the bottom sealing plate, and the triangular support block is arranged at the top end of the connecting thin rod.

[0023] From the above scheme, we can see that: through the fine design of the reserved chamber, inner slope, matching slots, bottom sealing plate, connecting thin rods and triangular support blocks, not only the precise matching and stable connection with the guide assembly are achieved, but also the ingenious layout of the inner slope and bottom sealing plate optimizes the introduction and distribution of gas. This design not only improves the effective contact of gas with the catalyst carrier during the cold start stage, but also promotes efficient purification of gas during the driving stage.

[0024] Preferably, limiting sliders are installed on both side ends of the bottom sealing plate, a limiting right-angle groove is opened in the middle position of the inner slope surface, and the limiting slider matches the limiting right-angle groove.

[0025] It can be seen from the above scheme that by installing limiting sliders on both sides of the bottom sealing plate and matching them with the limiting right-angle grooves in the middle of the inner slope surface, accurate positioning and stable installation of the bottom sealing plate are achieved.

[0026] Preferably, inner groove surfaces are provided on both sides of the triangular support block, and the fitting bars match the inner groove surfaces.

[0027] It can be seen from the above scheme that: by matching the inner groove surfaces set on both sides of the triangular support block with the fitting strips, not only the connection stability and structural strength between the introduction component and the reserved cavity plate are enhanced, but also the smoothness and continuity of the gas during the flow process are ensured, avoiding problems such as gas leakage and increased flow resistance.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. A noise-reducing three-way catalytic converter assembly realizes segmented treatment of exhaust gas in the cold start stage and driving stage through a reserved cavity plate, an introduction component and a guide component. In the cold start stage, the exhaust gas is guided to the reserved chamber for a short stay, which provides reaction time for the temperature rise of the catalyst carrier, avoiding the problem of low purification efficiency caused by the initial exhaust gas directly reacting with the unheated catalyst carrier. In the driving stage, the exhaust gas is fully in contact with the catalyst coating and the catalyst carrier through the optimized S-shaped flow path, which improves the exhaust gas purification efficiency.

[0030] 2. A noise-reducing three-way catalytic converter assembly, which effectively reduces the noise generated by exhaust emissions by optimizing the exhaust gas flow path and increasing catalytic active sites. When the exhaust gas passes through the tiny pore structure of the catalyst carrier, the contact area with the catalyst is increased, and the catalytic reaction can be completed more fully. The S-shaped flow path increases the contact opportunity with the catalyst, thereby reducing the noise generated by exhaust emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the internal overall structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the assembly structure of the introduction component, the guide component and the reserved cavity plate of the present invention;

[0033] Figure 3 It is a schematic plan view of the early stage of the cold start phase of the present invention;

[0034] Figure 4 This is a schematic diagram of the assembly structure of the guide assembly and the reserved cavity plate of the present invention;

[0035] Figure 5 This is a schematic diagram of the assembly structure of the introduction component and the reserved cavity plate of the present invention;

[0036] Figure 6 It is a schematic diagram of the disassembled structure of the guide assembly of the present invention;

[0037] Figure 7 This is a schematic diagram of the split structure of the import component of the present invention;

[0038] Figure 8 It is a schematic plan view of the late cold start stage of the present invention;

[0039] Fig. 9 It is a plan view schematically showing the driving stage of the present invention.

[0040] In the figure: 1. shell; 2. inner chamber; 3. liner; 4. catalyst carrier; 41. matching groove; 42. catalyst coating; 5. air inlet; 6. exhaust port; 7. introduction assembly; 71. positioning column; 72. arc-shaped movable strip plate; 73. movable guide plate one; 74. movable guide plate two; 75. fitting column; 76. fixed guide plate; 8. guide assembly; 81. U-shaped positioning plate; 811. side slide groove; 812. connecting spring; 813. matching slider; 82. push guide plate; 83. extended upper slot; 84. inner through slot; 9. reserved cavity plate; 91. reserved cavity; 92. inner slope; 921. limiting right-angle slot; 93. matching slot; 94. bottom sealing plate; 941. limiting slider; 95. connecting thin rod; 96. triangular support block. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figures 1 to 9 The present invention provides a noise reduction three-way catalytic converter assembly, and the technical solution is as follows:

[0043] A noise reduction three-way catalytic converter assembly, comprising a housing 1, an air inlet 5 installed at the upper end of the housing 1, and an exhaust port 6 arranged at the lower end of the housing 1, and also comprising an inner chamber 2, a gasket 3, a catalyst carrier 4, an introduction component 7, a guide component 8, and a reserved cavity plate 9, wherein the inner chamber 2 is opened inside the housing 1, the catalyst carrier 4 is installed inside the inner chamber 2, the catalyst carrier 4 is a honeycomb structure, the gasket 3 is located between the housing 1 and the catalyst carrier 4, the reserved cavity plate 9 is arranged on the cavity wall of the inner chamber 2, the introduction component 7 is installed at the upper end of the reserved cavity plate 9, and the guide component 8 is embedded from top to bottom. The catalyst carrier 4 is installed on the left and right side ends, and one end of the guide component 8 extends to the inner side of the reserved cavity plate 9. The catalyst carrier 4 is filled between the liner 3, the reserved cavity plate 9 and the guide component 8, and the catalyst carrier 4 is located at the lower end of the introduction component 7. The gas enters the inner chamber 2 along the air inlet 5. The gas in the cold start stage enters the inner side of the reserved cavity plate 9 from the middle position of the introduction component 7. After being filled, it gradually escapes from both sides to the catalyst carrier 4, and is discharged from the exhaust port 6 position after purification. The gas in the driving stage completes the purification reaction with the catalyst carrier 4 from the two side positions of the introduction component 7 and is discharged from the exhaust port 6 position.

[0044] In this embodiment, an independent chamber is added by reserving the cavity plate 9, and the high-concentration exhaust gas enters this chamber and gradually fills it. The exhaust gas has a short residence time, which prolongs the reaction time for the temperature rise of the catalyst carrier 4. The initial exhaust gas will not directly react with the catalyst carrier 4.

[0045] As an embodiment of the present invention, refer to Figure 1 Matching grooves 41 are evenly formed on both side ends of the catalyst carrier 4 , and the matching grooves 41 match the guide assembly 8 . Catalyst coatings 42 are provided on the upper surface of the catalyst carrier 4 and the concave bottom surface of the catalyst carrier 4 .

[0046] In this embodiment, regardless of the cold start phase or the driving phase, even if the gas flow path changes, the gas will directly react with the catalyst coating 42 and then pass into the honeycomb structure of the catalyst carrier 4.

[0047] As an embodiment of the present invention, refer to Figure 1-Figure 3 The introduction component 7 includes a positioning column 71, an arc-shaped movable strip plate 72, a movable guide plate 1 73, a movable guide plate 2 74 and a fitting column 75. The two ends of the positioning column 71 are installed on the cavity wall surface of the inner chamber 2. The arc-shaped movable strip plate 72 is arranged on the circumferential surface of the positioning column 71. The movable guide plate 1 73 is installed on one side end of the arc-shaped movable strip plate 72. One end of the movable guide plate 1 73 is fitted with the cavity wall of the inner chamber 2. The movable guide plate 2 74 is arranged on the other side end of the arc-shaped movable strip plate 72. The fitting column 75 is installed at the end of the movable guide plate 2 74. The fitting column 75 is fitted with the inner wall of the reserved cavity plate 9.

[0048] In this embodiment, when one end of the movable guide plate 1 73 is in contact with the cavity wall of the inner chamber 2, and the fitting column 75 is in contact with the inner wall of the reserved cavity plate 9, the movable guide plate 1 73, the movable guide plate 2 74 and the reserved cavity 91 form an independent cavity for accommodating the initial exhaust gas.

[0049] As an embodiment of the present invention, refer to Figure 3 A fixed guide plate 76 is installed on the side surface of the positioning column 71. The two fixed guide plates 76 are opposite to each other and have different lengths. A gas flow gap is set at the docking position of the two fixed guide plates 76.

[0050] In this embodiment, during the cold start phase of the engine, the exhaust concentration is high, the emission momentum is small, and the impact force of the gas is small. The positioning column 71 and the arc-shaped movable strip 72 are connected by a spring hinge. At this time, the movable guide plate 73 remains in place, and the gas inlet is only the gap between the two fixed guide plates 76, so the exhaust gas smoothly enters the chamber formed by the reserved chamber 91.

[0051] As an embodiment of the present invention, refer to Figure 3 , Figure 4 and Figure 8The guide assembly 8 includes a U-shaped positioning plate 81, a pushing guide plate 82, an extended upper slot 83 and an inner through slot 84. The U-shaped positioning plate 81 is installed in the matching slot 41. The pushing guide plate 82 is arranged on the inner side of the U-shaped positioning plate 81. The extended upper slot 83 is arranged on the upper surface of the pushing guide plate 82. Side sliding slots 811 are arranged on both inner side walls of the U-shaped positioning plate 81. Connecting springs 812 are arranged inside the side sliding slots 811. Matching sliders 813 are installed on both side ends of the pushing guide plate 82. The matching sliders 813 match the side sliding slots 811. One end of the connecting spring 812 is connected to the matching slider 813. The inner through slot 84 runs through the inner surface of the extended upper slot 83 arranged in the middle position.

[0052] In this embodiment, when the reserved chamber 91 is gradually filled with gas and gas continues to enter, the active push guide plate 82 is subjected to pressure and moves along the concave area of ​​the U-shaped positioning plate 81, allowing the gas to escape.

[0053] As an embodiment of the present invention, refer to Figure 4 The length of the pushing guide plate 82 at the middle position is shorter than that of the pushing guide plates 82 at the upper and lower positions, and the concave thickness of the U-shaped positioning plate 81 at the middle position is greater than that of the U-shaped positioning plate 81 at the upper and lower positions.

[0054] In this embodiment, due to the inconsistent concave thickness of the U-shaped positioning plate 81, after the pushing guide plate 82 completes the displacement, the pushing guide plate 82 in the middle position is completely closed with the U-shaped positioning plate 81, but the inner through groove 84 is pushed to the inside of the matching groove 41, and there is still a gap between the pushing guide plates 82 and the U-shaped positioning plate 81 in the upper and lower positions. The gap and the inner through groove 84 are on different vertical planes, forming a complex S-shaped gas flow path, which further optimizes the flow path of the exhaust gas. The honeycomb catalyst carrier 4 has a large number of tiny pore structures, which increase the catalytic active sites. When the exhaust gas passes through these pores, the contact area with the catalyst is increased, the catalytic reaction is fully completed, and the catalytic conversion effect reduces the content of harmful substances in the exhaust gas, thereby reducing the noise generated by exhaust gas emissions and improving the noise reduction effect.

[0055] As an embodiment of the present invention, refer to Figure 3 and Figure 4 The gap between the pushing guide plate 82 and the U-shaped positioning plate 81 at the middle position is smaller than the gap between the pushing guide plate 82 and the U-shaped positioning plate 81 at the upper and lower positions, and the catalyst coating 42 is arranged on the surface of the matching groove 41 corresponding to the lower end of each gap.

[0056] In this embodiment, during the driving stage, the pushing guide plate 82 returns to its original position, the inner groove 84 returns to the inside of the reserved chamber 91, and the gaps between the upper, middle and lower pushing guide plates 82 and the U-shaped positioning plate 81 are staggered, still presenting a complex S-shaped gas flow path. Moreover, because each gap corresponds to a catalyst coating 42, when the exhaust gas flows in an S shape from top to bottom, it will react with the catalyst coating 42 multiple times, and the catalytic reaction can be completed more fully, thereby improving the catalytic conversion efficiency of the exhaust gas.

[0057] As an embodiment of the present invention, refer to Figure 4 , Figure 5 and Fig. 9 The reserved cavity plate 9 includes a reserved cavity 91, an inner slope 92, a matching groove 93, a bottom sealing plate 94, a connecting thin rod 95 and a triangular support block 96. The two side ends of the reserved cavity 91 are installed on the cavity wall of the inner cavity 2. The inner slope 92 is arranged on the inner surface of the bottom end of the reserved cavity 91. The matching groove 93 is evenly opened on the surface of the reserved cavity 91. The matching groove 93 corresponds to the matching groove 41. The matching groove 93 matches the U-shaped positioning plate 81 and the pushing guide plate 82. The bottom sealing plate 94 is arranged on the inner side of the two inner slopes 92, and the two side ends of the bottom sealing plate 94 match the slope surface of the inner slope 92. The connecting thin rod 95 is installed in the center of the upper surface of the bottom sealing plate 94, and the triangular support block 96 is arranged at the top of the connecting thin rod 95.

[0058] In this embodiment, during the driving stage, although the middle position of the introduction component 7 is blocked, because the movable guide plate 1 73 is opened and the movable guide plate 2 74 swings synchronously, the gas can enter the two chambers at the same time, the fitting column 75 lifts the triangular support block 96, the bottom sealing plate 94 is lifted upward, and the chamber formed by the reserved chamber 91 is in a state of being opened up and down.

[0059] As an embodiment of the present invention, refer to Figure 5 and Figure 6 The two side ends of the bottom sealing plate 94 are both installed with limiting sliders 941 , and the middle position of the slope surface of the inner slope 92 is provided with a limiting right-angle groove 921 , and the limiting slider 941 matches the limiting right-angle groove 921 .

[0060] In this embodiment, the high-concentration exhaust gas originally accumulated in the chamber formed by the reserved chamber 91 is neutralized by the low-concentration exhaust gas and reacts with the catalyst coating 42 at the concave position, and then the cycle operation is carried out.

[0061] As an embodiment of the present invention, refer to Figure 7 The two sides of the triangular support block 96 are provided with inner groove surfaces, and the fitting bar 75 matches the inner groove surfaces.

[0062] In this embodiment, the exhaust gas during the driving phase directly reacts with the catalyst carrier 4 in an S-shaped flow path to maintain a normal exhaust gas purification effect.

[0063] Working principle: During the cold start stage, the generated gas enters the inner chamber 2, and then enters the inner side of the reserved cavity plate 9 from the middle position of the introduction component 7. After filling the interior of the reserved cavity plate 9, the pressure is transmitted to the pushing guide plate 82, opening the connection channel between the interior of the reserved cavity plate 9 and the catalyst carrier 4. The gas escapes, and after reacting with the catalyst coating 42, the gas enters the interior of the catalyst carriers 4 on both sides and is discharged from the exhaust port 6; during the driving stage, due to the increase in gas displacement, the two sides of the introduction component 7 are opened by force, and the gas directly reacts with the catalyst coating 42 and is discharged from the exhaust port 6.

[0064] Specifically, in the early stage of cold start of the engine, the exhaust concentration is large and the emission momentum is small. The gas enters the reserved chamber 91 along the gap between the two arc-shaped movable strips 72. At this time, one end of the movable guide plate 1 73 is in contact with the cavity wall of the inner chamber 2, and the contact bar 75 is in contact with the inner wall of the reserved chamber 91. The gas gradually enters the reserved chamber 91 and stays there for a short time.

[0065] In the later stage of engine cold start, the catalyst carrier 4 gradually rises to the reaction temperature. After the gas fills the reserved chamber 91, the pressure is transmitted to the pushing guide plate 82. By utilizing the elastic structure of the connecting spring 812, the pushing guide plate 82 moves inward along the concave area of ​​the U-shaped positioning plate 81 until the pushing guide plate 82 at the middle position and the U-shaped positioning plate 81 are completely closed. The pushing guide plates 82 at the upper and lower positions and the U-shaped positioning plate 81 still have enough gaps. The extended upper slots 83 at the upper, middle and lower positions are all in the matching slot 93 position. The gas can enter the catalyst carrier 4 along the extended upper slots 83. At this time, the gap between the upper pushing guide plate 82 and the U-shaped positioning plate 81, the inner through slot 84 at the middle position, and the gap between the lower pushing guide plate 82 and the U-shaped positioning plate 81 form an S-shaped flow path, and the gas completes the purification reaction with the catalyst coating 42 at the corresponding position and is discharged from the exhaust port 6 position.

[0066] After the engine enters the driving stage, the exhaust concentration is small and the emission momentum is large. The movable guide plate 1 73 is stressed, and the arc-shaped movable strip plate 72 rotates along the surface of the positioning column 71. The movable guide plate 1 73 and the movable guide plate 2 74 both swing toward the middle. The two movable guide plates 2 74 are connected to the triangular support block 96 through the fitting strip column 75. The air inlet 5 at the middle position of the introduction component 7 is blocked, and the gas enters the inside and outside of the reserved chamber 91 along the two sides of the introduction component 7. On the one hand, due to the swing of the movable guide plate 2 74, not only the fitting strip column 75 is connected to the triangular support block 96, but also the height of the triangular support block 96 is increased, and the bottom sealing plate 94 is driven by the connecting thin rod 95. Moving upward, the two ends of the bottom sealing plate 94 are separated from the inner slope 92, and a gap is generated between the two. A part of the gas reacts with the catalyst coating 42 at this position along the gap and is then discharged from the exhaust port 6. On the other hand, another part of the gas directly reacts with the catalyst coating 42 at the upper end of the catalyst carrier 4 and enters the interior of the catalyst carrier 4. At this time, the gap between the upper push guide plate 82 and the U-shaped positioning plate 81, the gap between the middle push guide plate 82 and the U-shaped positioning plate 81, and the gap between the lower push guide plate 82 and the U-shaped positioning plate 81 form another S-shaped flow path, which increases the multiple contacts between the gas and the catalyst and is discharged from the exhaust port 6.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A noise reduction three-way catalytic converter assembly, comprising a housing (1), an air inlet (5) mounted on the upper end of the housing (1), and an exhaust port (6) arranged at the lower end of the housing (1), Features: The invention also comprises an inner chamber (2), a gasket (3), a catalyst carrier (4), an introduction component (7), a guide component (8) and a reserved cavity plate (9), wherein the inner chamber (2) is opened inside the shell (1), the catalyst carrier (4) is installed inside the inner chamber (2), the catalyst carrier (4) is a honeycomb structure, the gasket (3) is located between the shell (1) and the catalyst carrier (4), the reserved cavity plate (9) is arranged on the cavity wall of the inner chamber (2), the introduction component (7) is installed on the upper end of the reserved cavity plate (9), the guide component (8) is embedded and installed on the left and right side ends of the catalyst carrier (4) from top to bottom, and the guide component One end of the guide assembly (8) extends to the inner side of the reserved cavity plate (9), the catalyst carrier (4) is filled between the liner (3), the reserved cavity plate (9) and the guide assembly (8), and the catalyst carrier (4) is located at the lower end of the introduction assembly (7). The gas enters the inner chamber (2) along the air inlet (5). The gas in the cold start stage enters the inner side of the reserved cavity plate (9) from the middle position of the introduction assembly (7), and gradually escapes from both sides into the catalyst carrier (4) after being filled, and is discharged from the exhaust port (6) after being purified. The gas in the running stage completes the purification reaction with the catalyst carrier (4) from the two sides of the introduction assembly (7) and is discharged from the exhaust port (6).

2. A noise reduction three-way catalytic converter assembly according to claim 1, Features: Matching grooves (41) are evenly provided on both side ends of the catalyst carrier (4), the matching grooves (41) match the guide assembly (8), and the upper surface of the catalyst carrier (4) and the concave bottom surface of the catalyst carrier (4) are both provided with a catalyst coating (42).

3. A noise reduction three-way catalytic converter assembly according to claim 1, Features: The introduction component (7) comprises a positioning column (71), an arc-shaped movable strip plate (72), a movable guide plate 1 (73), a movable guide plate 2 (74) and a fitting column (75), wherein both ends of the positioning column (71) are mounted on the cavity wall surface of the inner chamber (2), the arc-shaped movable strip plate (72) is arranged on the circumferential surface of the positioning column (71), the movable guide plate 1 (73) is mounted on one side end of the arc-shaped movable strip plate (72), one end of the movable guide plate 1 (73) is fitted with the cavity wall of the inner chamber (2), the movable guide plate 2 (74) is arranged on the other side end of the arc-shaped movable strip plate (72), the fitting column (75) is mounted on the end of the movable guide plate 2 (74), and the fitting column (75) is fitted with the inner side wall of the reserved cavity plate (9).

4. A noise reduction three-way catalytic converter assembly according to claim 3, Features: A fixed guide plate (76) is installed on the side surface of the positioning column (71), the two fixed guide plates (76) are positioned opposite to each other, and the two fixed guide plates (76) are of different lengths, and a gas flow gap is provided at the butt joint of the two fixed guide plates (76).

5. A noise reduction three-way catalytic converter assembly according to claim 2, Features: The guide assembly (8) comprises a U-shaped positioning plate (81), a pushing guide plate (82), an extended upper slot (83) and an inner through slot (84); the U-shaped positioning plate (81) is installed in the matching slot (41); the pushing guide plate (82) is arranged on the inner side of the U-shaped positioning plate (81); the extended upper slot (83) is arranged on the upper surface of the pushing guide plate (82); both inner side walls of the U-shaped positioning plate (81) are provided with side slide slots (811); a connecting spring (812) is arranged inside the side slide slot (811); matching sliders (813) are installed on both side ends of the pushing guide plate (82); the matching sliders (813) match the side slide slots (811); one end of the connecting spring (812) is connected to the matching slider (813); and the inner through slot (84) runs through the inner surface of the extended upper slot (83) arranged in the middle position.

6. A noise reduction three-way catalytic converter assembly according to claim 5, Features: The length of the pushing guide plate (82) at the middle position is shorter than that of the pushing guide plates (82) at the upper and lower positions, and the inner concave thickness of the U-shaped positioning plate (81) at the middle position is greater than that of the U-shaped positioning plates (81) at the upper and lower positions.

7. A noise reduction three-way catalytic converter assembly according to claim 5, Features: The gap between the pushing guide plate (82) and the U-shaped positioning plate (81) at the middle position is smaller than the gap between the pushing guide plate (82) and the U-shaped positioning plate (81) at the upper and lower positions, and the catalyst coating (42) is arranged on the surface of the corresponding matching groove (41) at the lower end of each gap.

8. The noise reduction three-way catalytic converter assembly according to claim 5, Features: The reserved cavity plate (9) comprises a reserved cavity (91), an inner slope (92), a matching groove (93), a bottom sealing plate (94), a connecting thin rod (95) and a triangular support block (96). Both side ends of the reserved cavity (91) are mounted on the cavity wall of the inner cavity (2). The inner slope (92) is arranged on the inner side surface of the bottom end of the reserved cavity (91). The matching groove (93) is evenly arranged on the surface of the reserved cavity (91). The bottom sealing plate (94) is arranged on the inner side of the two inner slopes (92), and the two side ends of the bottom sealing plate (94) are matched with the slope surface of the inner slopes (92). The connecting thin rod (95) is installed in the center of the upper surface of the bottom sealing plate (94), and the triangular support block (96) is arranged on the top of the connecting thin rod (95).

9. A noise reduction three-way catalytic converter assembly according to claim 8, Features: Limiting slide blocks (941) are installed on both side ends of the bottom sealing plate (94), a limiting right-angle groove (921) is provided in the middle of the slope surface of the inner slope (92), and the limiting slide block (941) matches the limiting right-angle groove (921).

10. A noise reduction three-way catalytic converter assembly according to claim 8, Features: The two sides of the triangular support block (96) are provided with inner groove surfaces, and the fitting bar (75) matches the inner groove surfaces.

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