An internal combustion engine exhaust filtering device

Abstract

The utility model relates to internal combustion engine technical field especially a kind of internal combustion engine filtering exhaust device, including, exhaust manifold, the exhaust manifold is connected with the cylinder of internal combustion engine;Gas flow homogenization mechanism is arranged in the one end of the exhaust manifold, the exhaust manifold is used to introduce the exhaust gas of internal combustion engine cylinder into the gas flow homogenization mechanism;Exhaust mechanism is connected with the export end of the gas flow homogenization mechanism, for catalytic filtration treatment to exhaust gas, the exhaust mechanism includes filter assembly, the filter assembly further includes gradient pore silicon carbide filter element, the pore of the gradient pore silicon carbide filter element gradually decreases from import end to export end, the utility model contains wire mesh and gradient pore silicon carbide filter element, wire mesh filters larger particulate matter, the pore of gradient pore silicon carbide filter element gradually decreases from import end to export end, can gradually filter the particulate matter of different particle size in exhaust gas, filtering level is more distinct, improve the filtration efficiency of particulate matter.

Description

Technical Field

[0001] This utility model relates to the field of internal combustion engine technology, and in particular to an internal combustion engine exhaust filtration device. Background Technology

[0002] Automotive internal combustion engine exhaust refers to the process by which exhaust gases produced during the combustion cycle of an internal combustion engine are discharged from the cylinder. These exhaust gases contain components such as carbon dioxide, water vapor, nitrogen oxides, carbon monoxide, hydrocarbons, and particulate matter, and cannot be directly emitted. Therefore, an internal combustion engine exhaust filtration device is required.

[0003] Existing internal combustion engine exhaust filtration devices have some shortcomings in use: during gas filtration, the filtration layers are not distinct, causing some impurities to be missed and discharged with the exhaust gas, causing air pollution.

[0004] To address these issues, those skilled in the art have proposed an internal combustion engine exhaust filtration device. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] In view of the problem that the filtration layers are not distinct in the above or existing technologies, resulting in the leakage of some impurities during filtration, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide an internal combustion engine exhaust filtration device.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an internal combustion engine exhaust filtration device, comprising an exhaust manifold, wherein the exhaust manifold is connected to the cylinder of the internal combustion engine;

[0009] An airflow equalization mechanism is provided at one end of the exhaust manifold, wherein the exhaust manifold is used to introduce the exhaust gas discharged from the internal combustion engine cylinder into the airflow equalization mechanism.

[0010] An exhaust mechanism, connected to the outlet end of the airflow equalization mechanism, is used for catalytic filtration of exhaust gas. The exhaust mechanism includes a filter assembly, which further includes a gradient pore silicon carbide filter element. The pore size of the gradient pore silicon carbide filter element decreases sequentially from the inlet end to the outlet end.

[0011] A sealing and fixing mechanism installed on the exhaust mechanism is used to seal and fix the connection of the exhaust mechanism.

[0012] As a preferred embodiment of the internal combustion engine exhaust filtration device of this utility model, the airflow homogenization mechanism includes a spiral guide pipe and a flared pipe, the spiral guide pipe is installed at one end of the exhaust manifold, and the flared pipe is installed at the tail end of the spiral guide pipe.

[0013] As a preferred embodiment of the internal combustion engine exhaust filtration device of this utility model, the inner wall of the spiral guide tube is provided with a nano-ceramic coating, and the nano-ceramic coating is coated with polytetrafluoroethylene. The spiral channel generates a rotating flow, breaking the laminar flow state of the exhaust gas, making the temperature and composition distribution more uniform, improving the efficiency of subsequent filtration and catalysis. The nano-ceramic coating reduces the probability of particulate matter adhesion, and the polytetrafluoroethylene causes liquid oil droplets and water films to form beads and roll off.

[0014] As a preferred embodiment of the internal combustion engine exhaust filtration device of this utility model, the exhaust mechanism includes two interlocking semi-circular exhaust pipes, one end of each semi-circular exhaust pipe is interlocked with one end of the flared pipe, a three-way catalyst is provided inside the two semi-circular exhaust pipes near the inlet, and a gasoline particulate filter is provided inside the two semi-circular exhaust pipes near the outlet.

[0015] In a preferred embodiment of the internal combustion engine exhaust filtration device of this utility model, the filter assembly is also disposed inside the semi-circular exhaust pipe, and the filter assembly is located between the three-way catalyst and the gasoline particulate filter.

[0016] As a preferred embodiment of the internal combustion engine exhaust filtration device of this utility model, the filter assembly further includes a retaining ring one and a retaining ring two, the retaining ring one and the retaining ring two being respectively engaged with the front and rear sides inside the semi-circular exhaust pipe, a plurality of connecting rods being horizontally connected between the retaining ring one and the retaining ring two, a metal wire mesh being installed on the inner circumference of the retaining ring one, and the gradient pore silicon carbide filter element being installed inside the retaining ring two.

[0017] As a preferred embodiment of the internal combustion engine exhaust filtration device of this utility model, wherein: the gradient pore silicon carbide filter element is provided with a micro heating wire array inside.

[0018] As a preferred embodiment of the internal combustion engine exhaust filtration device of this utility model, the sealing and fixing mechanism includes a high-temperature resistant graphite pad and a locking assembly. The two high-temperature resistant graphite pads are respectively fixed at the connection of the two semi-circular exhaust pipes, and the locking assembly is disposed on both sides of the surface of the two semi-circular exhaust pipes near the high-temperature resistant graphite pads.

[0019] As a preferred embodiment of the internal combustion engine exhaust filtration device of this utility model, the locking assembly includes two clamps, which are respectively installed on the surfaces of the two semi-circular exhaust pipes, and the outer walls of one side of the two clamps are in contact with each other. Two locking rods are inserted into the outer walls of one side of the two clamps, and a locking cap is sleeved on one end of the locking rod.

[0020] The beneficial effects of the internal combustion engine exhaust filtration device of this utility model:

[0021] The spiral guide tube in the airflow equalization mechanism can guide the exhaust gas to rotate and flow, so that the exhaust gas is evenly distributed, which prepares for subsequent filtration and catalytic purification, allowing the exhaust gas to come into more full contact with the filter components and the three-way catalyst, thereby improving the treatment effect.

[0022] The filter assembly includes a metal wire mesh and a gradient pore silicon carbide filter element. The metal wire mesh can filter larger particles first, while the pore size of the gradient pore silicon carbide filter element gradually decreases from the inlet to the outlet, which can gradually filter particles of different sizes in the exhaust gas. The filtration layers are more distinct, less likely to be missed, improve the filtration efficiency of particles, make the exhaust gas treatment more complete, and reduce air pollution. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0024] Figure 1 This is a schematic diagram of the overall structure of an internal combustion engine exhaust filtration system.

[0025] Figure 2 for Figure 1 A magnified structural diagram at point A.

[0026] Figure 3 for Figure 1 Another structural diagram from another angle.

[0027] Figure 4 This is a schematic diagram of the internal structure of the exhaust mechanism of an internal combustion engine's exhaust filtration device.

[0028] In the diagram: 100, Exhaust manifold; 200, Airflow equalization mechanism; 201, Spiral guide pipe; 202, Flared pipe; 300, Exhaust mechanism; 301, Semi-circular exhaust pipe; 302, Three-way catalytic converter; 303, Filter assembly; 3031, Snap ring one; 3032, Metal wire mesh; 3033, Connecting rod; 3034, Snap ring two; 3035, Gradient pore silicon carbide filter element; 304, Gasoline particulate filter; 400, Sealing and fixing mechanism; 401, High-temperature resistant graphite pad; 402, Clamp; 403, Locking rod; 404, Locking cap. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0032] Example 1

[0033] Reference Figure 1 , Figure 3 and Figure 4 This is the first embodiment of the present utility model. This embodiment provides an internal combustion engine exhaust filtration device that can improve the filtration efficiency of particulate matter and achieve a more distinct filtration layer. It includes an exhaust manifold 100, which is connected to the cylinder of the internal combustion engine.

[0034] An airflow equalization mechanism 200 is provided at one end of the exhaust manifold 100. The exhaust manifold 100 is used to introduce the exhaust gas discharged from the internal combustion engine cylinder into the airflow equalization mechanism 200.

[0035] The exhaust mechanism 300 is connected to the outlet end of the airflow equalization mechanism 200 and is used for catalytic filtration of exhaust gas. The exhaust mechanism 300 includes a filter assembly 303, which also includes a gradient pore silicon carbide filter element 3035. The pore size of the gradient pore silicon carbide filter element 3035 decreases sequentially from the inlet end to the outlet end.

[0036] A sealing and fixing mechanism 400 installed on the exhaust mechanism 300 is used to seal and fix the connection of the exhaust mechanism 300.

[0037] During operation, the exhaust gas generated by the internal combustion engine enters the airflow equalization mechanism 200 through the exhaust manifold 100 from the cylinder, guiding the exhaust gas to rotate and flow, breaking the laminar flow state of the exhaust gas, making the temperature and composition distribution more uniform, and improving the efficiency of subsequent filtration and catalysis. Then, it enters the exhaust mechanism 300 for catalysis and filtration. The gradient pore silicon carbide filter element 3035 filters out particulate matter and other impurities in the exhaust gas, and then it is discharged to the outside through the exhaust mechanism 300. The exhaust mechanism 300 is fixed by the sealing and fixing mechanism 400. After opening the sealing and fixing mechanism 400, the exhaust mechanism 300 can be disassembled for easy cleaning and replacement of internal parts.

[0038] Example 2

[0039] Reference Figure 1 , Figure 3 and Figure 4 This is the second embodiment of the present invention. Unlike the previous embodiment, the airflow homogenization mechanism 200 includes a spiral guide pipe 201 and a flared pipe 202. The spiral guide pipe 201 is installed at one end of the exhaust manifold 100, and the flared pipe 202 is installed at the tail end of the spiral guide pipe 201.

[0040] Specifically, the inner wall of the spiral guide tube 201 is provided with a nano-ceramic coating, and polytetrafluoroethylene is coated on the nano-ceramic coating.

[0041] The spiral guide tube 201 generates a rotating flow through the spiral channel, breaking the laminar flow state of the exhaust gas, making the temperature and composition distribution more uniform, and improving the efficiency of subsequent filtration and catalysis. The nano-ceramic coating reduces the probability of particulate matter adhesion, and polytetrafluoroethylene causes liquid oil droplets and water films to form beads and roll off.

[0042] Furthermore, the exhaust mechanism 300 includes two interlocking semi-circular exhaust pipes 301, one end of which is interlocked with one end of the flared pipe 202. A three-way catalyst 302 is installed inside the two semi-circular exhaust pipes 301 near the inlet, and a gasoline particulate filter 304 is installed inside the two semi-circular exhaust pipes 301 near the outlet.

[0043] The three-way catalyst 302 catalyzes and purifies harmful gases in the exhaust gas, such as oxidizing carbon monoxide and hydrocarbons into carbon dioxide and water, and reducing nitrogen oxides into nitrogen, effectively reducing the emission of harmful gases. The gasoline particulate filter 304 further filters particulate matter in the exhaust gas to ensure that the particulate matter content in the discharged exhaust gas meets environmental protection requirements.

[0044] The filter assembly 303 is also located inside the semi-circular exhaust pipe 301, and the filter assembly 303 is located between the three-way catalyst 302 and the gasoline particulate filter 304.

[0045] It should be noted that the filter assembly 303 also includes a retaining ring 3031 and a retaining ring 3034. The retaining ring 3031 and the retaining ring 3034 are respectively snapped into the front and rear sides inside the semi-circular exhaust pipe 301. Multiple connecting rods 3033 are horizontally connected between the retaining ring 3031 and the retaining ring 3034. A metal wire mesh 3032 is installed on the inner circumference of the retaining ring 3031. The gradient pore silicon carbide filter element 3035 is installed inside the retaining ring 3034.

[0046] The gradient pore silicon carbide filter element 3035 has a micro heating wire array inside.

[0047] In use, the metal wire mesh 3032 can first filter larger particles. The pore size of the gradient pore silicon carbide filter element 3035 gradually decreases from the inlet end to the outlet end, which can gradually filter particles of different sizes in the exhaust gas, improve the filtration efficiency of particles. The micro electric heating wire array can continue to heat the gas, so that it can pass through the subsequent gasoline particulate filter 304 at a suitable temperature, which facilitates the subsequent further filtration work.

[0048] Example 3

[0049] Reference Figures 1 to 4 This is the third embodiment of the present invention. Unlike the previous embodiment, the sealing and fixing mechanism 400 includes a high-temperature resistant graphite pad 401 and a locking assembly. The two high-temperature resistant graphite pads 401 are respectively fixed at the connection of the two semi-circular exhaust pipes 301, and the locking assembly is disposed on both sides of the surface of the two semi-circular exhaust pipes 301 near the high-temperature resistant graphite pads 401.

[0050] Specifically, the locking assembly includes two clamps 402, which are respectively installed on the surfaces of two semi-circular exhaust pipes 301, and the outer walls of one side of the two clamps 402 are in contact with each other. Two locking rods 403 are inserted into the outer walls of one side of the two clamps 402, and a locking cap 404 is sleeved on one end of the locking rod 403.

[0051] In use, the high-temperature resistant graphite pad 401 seals the connection between the two semi-circular exhaust pipes 301. The two semi-circular exhaust pipes 301 are fixed by the clamp 402. The exhaust mechanism 300 can be removed by removing the locking cap 404 and locking rod 403, as well as tearing off the high-temperature resistant graphite pad 401, which makes it easier to clean or replace the internal parts. Then, the semi-circular exhaust pipes 301 are reassembled, and a new high-temperature resistant graphite pad 401 is attached and fixed by the clamp 402, making maintenance more convenient.

[0052] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An exhaust filtration device for an internal combustion engine, characterized in that: include, An exhaust manifold (100) is connected to the cylinder of an internal combustion engine; An airflow equalization mechanism (200) is provided at one end of the exhaust manifold (100), the exhaust manifold (100) is used to introduce the exhaust gas discharged from the internal combustion engine cylinder into the airflow equalization mechanism (200); An exhaust mechanism (300) is connected to the outlet end of the airflow equalization mechanism (200) and is used for catalytic filtration of exhaust gas. The exhaust mechanism (300) includes a filter assembly (303), and the filter assembly (303) further includes a gradient pore silicon carbide filter element (3035). The pore size of the gradient pore silicon carbide filter element (3035) decreases sequentially from the inlet end to the outlet end. A sealing and fixing mechanism (400) installed on the exhaust mechanism (300) is used to seal and fix the connection of the exhaust mechanism (300).

2. The internal combustion engine exhaust filtration device as described in claim 1, characterized in that: The airflow equalization mechanism (200) includes a spiral guide pipe (201) and a flared pipe (202). The spiral guide pipe (201) is installed at one end of the exhaust manifold (100), and the flared pipe (202) is installed at the tail end of the spiral guide pipe (201).

3. The internal combustion engine exhaust filtration device as described in claim 2, characterized in that: The inner wall of the spiral guide tube (201) is provided with a nano-ceramic coating, and the nano-ceramic coating is coated with polytetrafluoroethylene.

4. The internal combustion engine exhaust filtration device as described in claim 3, characterized in that: The exhaust mechanism (300) includes two interlocking semi-circular exhaust pipes (301), one end of which is interlocked with one end of the flared pipe (202). A three-way catalyst (302) is installed inside the two semi-circular exhaust pipes (301) near the inlet, and a gasoline particulate filter (304) is installed inside the two semi-circular exhaust pipes (301) near the outlet.

5. The internal combustion engine exhaust filtration device as described in claim 4, characterized in that: The filter assembly (303) is also disposed inside the semi-circular exhaust pipe (301), and the filter assembly (303) is located between the three-way catalyst (302) and the gasoline particulate filter (304).

6. The internal combustion engine exhaust filtration device as described in claim 5, characterized in that: The filter assembly (303) further includes a retaining ring one (3031) and a retaining ring two (3034). The retaining ring one (3031) and the retaining ring two (3034) are respectively engaged on the front and rear sides inside the semi-circular exhaust pipe (301). A plurality of connecting rods (3033) are horizontally connected between the retaining ring one (3031) and the retaining ring two (3034). A metal wire mesh (3032) is installed on the inner circumference of the retaining ring one (3031). The gradient pore silicon carbide filter element (3035) is installed inside the retaining ring two (3034).

7. The internal combustion engine exhaust filtration device as described in claim 6, characterized in that: The gradient pore silicon carbide filter element (3035) has a micro heating wire array inside.

8. The internal combustion engine exhaust filtration device as described in claim 7, characterized in that: The sealing and fixing mechanism (400) includes a high-temperature resistant graphite pad (401) and a locking assembly. The two high-temperature resistant graphite pads (401) are respectively fixed at the connection of the two semi-circular exhaust pipes (301). The locking assembly is disposed on both sides of the surface of the two semi-circular exhaust pipes (301) near the high-temperature resistant graphite pads (401).

9. The internal combustion engine exhaust filtration device as described in claim 8, characterized in that: The locking assembly includes two clamps (402), which are respectively installed on the surfaces of the two semi-circular exhaust pipes (301), and the outer walls of the two clamps (402) are in contact with each other. Two locking rods (403) are inserted into the outer walls of the two clamps (402), and a locking cap (404) is sleeved on one end of the locking rod (403).

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