Motor vehicle exhaust purification device

Abstract

This utility model relates to a motor vehicle exhaust purification device, belonging to the field of motor vehicle exhaust purification technology. It includes a filter assembly and a catalytic converter assembly, which are sealed together. The filter assembly includes a filter housing with several baffles inside. A high-efficiency filter and an electric heating element are also installed inside the filter housing. The high-efficiency filter is detachable and used to intercept small particulate impurities in the exhaust gas. The electric heating element is used to heat the exhaust gas and the catalytic converter assembly. The catalytic converter assembly includes a catalytic converter housing with a catalytic device fixed inside. This motor vehicle exhaust purification device uses a filter assembly to perform multi-stage filtration to remove particulate matter from the exhaust gas, preventing clogging of the downstream catalytic converter assembly. Simultaneously, the electric heating element heats the exhaust gas and the catalytic converter assembly, shortening the catalyst heating time during cold starts, improving catalytic efficiency, and enhancing the exhaust gas purification effect.

Description

Technical Field

[0001] This utility model relates to a motor vehicle exhaust purification device, belonging to the field of motor vehicle exhaust purification technology. Background Technology

[0002] Motor vehicle exhaust purification devices are installed in the vehicle's exhaust system and use a three-way catalytic converter to convert harmful gases such as carbon monoxide, nitrogen oxides, and hydrocarbons in the exhaust into harmless substances. Their core function is to reduce the pollution of air by motor vehicle exhaust and ensure that emissions meet the national exhaust emission standards.

[0003] Existing vehicle exhaust purification devices lack dust filtration devices. Vehicles may develop hard carbon deposits and other particulate matter due to poor fuel quality. These hard carbon deposits adhere to the catalyst carrier wall, gradually narrowing the pores and affecting the exhaust purification effect. In addition, the catalyst filled in the three-way catalytic converter needs to be between 250-350°C to work effectively. When a vehicle starts in a low-temperature environment, it takes a certain amount of time for the catalyst to reach above 250°C, resulting in low exhaust purification efficiency during this period. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a motor vehicle exhaust purification device that avoids the narrowing and blockage of the catalyst channel, and at the same time shortens the heating time of the catalyst when the motor vehicle is started in a low temperature environment, thereby improving the exhaust purification effect. The vehicle exhaust purification device of this utility model includes a filter assembly and a catalytic converter assembly, which are sealed together. The filter assembly is used to filter and remove carbon deposits and particulate matter from the exhaust gas, and the catalytic converter assembly is used to convert harmful gases in the exhaust gas into harmless substances. The filter assembly includes a filter housing with several baffles inside. The baffles can change the passage path of the exhaust gas, thereby facilitating the deposition of large particulate impurities in the exhaust gas. A high-efficiency filter and an electric heating element are also installed inside the filter housing. The high-efficiency filter is detachable and is used to intercept small particulate impurities in the exhaust gas. The electric heating element is used to heat the exhaust gas and the catalytic converter assembly. The catalytic converter assembly includes a catalytic converter housing, and a catalytic device is fixed inside the catalytic converter housing.

[0005] The technical solution of this utility model is to provide a motor vehicle exhaust gas purification device, which removes particulate matter in the exhaust gas through multi-stage filtration by a filter assembly to avoid clogging the downstream catalyst assembly; at the same time, an electric heating tube is set to heat the exhaust gas and the catalyst device to shorten the catalyst heating time during cold start, improve catalytic efficiency, and improve the exhaust gas purification effect.

[0006] Preferably, the two sides of the baffle are fixedly connected to the inner wall of the filter housing, the height of the baffle is less than the internal height of the filter housing, and the baffles are staggered vertically, so that the passage path of the exhaust gas changes vertically, which is conducive to the deposition of large particulate impurities.

[0007] Preferably, a sealing cover is hinged to the filter housing, the sealing cover is located below the baffle plate, the sealing cover is provided with a locking buckle for locking, and a sealing strip is attached to the inside of the sealing cover. After the sealing cover is locked, it can form a sealed contact with the filter housing and the lower baffle plate; opening the sealing cover can discharge the deposited large particulate impurities.

[0008] Preferably, the filter housing is provided with a limiting track inside, which is used to limit the position of the high-efficiency filter.

[0009] Preferably, the catalytic device includes a catalyst shell, in which the catalyst is enclosed. The catalyst shell has a hollow structure, and the area between the inner wall of the catalyst shell and the catalyst is filled with coolant. The front end of the catalyst shell is provided with an inlet pipe, and the rear end of the catalyst shell is provided with an outlet pipe. Both the inlet pipe and the outlet pipe are connected to the cooling system of the motor vehicle through pipelines.

[0010] The advantages of this utility model compared with the prior art are: The vehicle exhaust purification device of this utility model is equipped with a filter assembly to remove particulate matter in the exhaust gas through multi-stage filtration to avoid clogging of the downstream catalyst assembly; at the same time, an electric heating tube is provided to heat the exhaust gas and the catalyst device to shorten the catalyst heating time during cold start of the vehicle, improve catalytic efficiency, and improve the exhaust gas purification effect. Attached Figure Description Figure 1 This is one of the structural schematic diagrams of this utility model; Figure 2 This is the second structural schematic diagram of this utility model; Figure 3 This is a cross-sectional view of the filter component; Figure 4 This is a schematic diagram of the catalytic component; Figure 5 This is a schematic diagram of the catalytic converter.

[0011] In the diagram: 1. Filter assembly; 11. Filter housing; 111. Limiting track; 112. Sealing cover; 12. Electric heating tube; 13. High-efficiency filter; 14. Baffle plate; 2. Catalytic assembly; 21. Catalytic housing; 22. Catalytic device; 221. Catalyst housing; 222. Catalyst; 223. Inlet pipe; 224. Outlet pipe; 23. Temperature sensor. Detailed Implementation

[0012] like Figures 1-5 As shown, this embodiment is achieved through the following technical solution: It includes a filter assembly 1 and a catalytic converter 2, which are sealed together. The filter assembly 1 is used to filter and remove carbon deposits and particulate matter from the exhaust gas, and the catalytic converter 2 is used to convert harmful gases in the exhaust gas into harmless substances. The filter assembly 1 includes a filter housing 11, which is connected to the exhaust manifold of the vehicle. The filter housing 11 has several baffles 14 inside, which can change the path of the exhaust gas, thereby facilitating the deposition of large particulate impurities in the exhaust gas. The filter housing 11 also has a high-efficiency filter 13 and an electric heating element 12 installed inside. The high-efficiency filter 13 is detachable and used to intercept small particulate impurities in the exhaust gas. The electric heating element 12 is used to heat the exhaust gas and the catalytic converter 2. The catalytic converter 2 includes a catalytic converter housing 21, which is connected to the exhaust pipe of the vehicle. A catalytic converter 22 is fixed inside the catalytic converter housing 21.

[0013] In this embodiment, the two sides of the baffle plate 14 are fixedly connected to the inner wall of the filter housing 11. The height of the baffle plate 14 is less than the internal height of the filter housing 11, and the baffle plates 14 are staggered vertically, so that the passage path of the exhaust gas changes vertically, which is conducive to the deposition of large particulate impurities.

[0014] A sealing cover 112 is hinged to the filter housing 11. The sealing cover 112 is located below the baffle plate 14. The sealing cover 112 is provided with a locking buckle for locking. A sealing strip is attached to the inside of the sealing cover 112. When locked, the sealing cover 112 can form a sealed contact with the filter housing 11 and the lower baffle plate. Opening the sealing cover 112 can discharge large particulate impurities deposited inside the filter housing 11. A limiting track 111 is provided inside the filter housing 11 to limit the position of the high-efficiency filter 13.

[0015] The catalytic device 22 includes a catalyst housing 221, in which the catalyst 222 is enclosed. The catalyst housing 221 has a hollow structure. The area between the inner wall of the catalyst housing 221 and the catalyst 222 is filled with coolant. The front end face of the catalyst housing 221 is provided with a liquid inlet pipe 223, and the rear end face of the catalyst housing 221 is provided with a liquid outlet pipe 224. Both the liquid inlet pipe 223 and the liquid outlet pipe 224 are connected to the cooling system of the motor vehicle through pipes, and an electric valve is provided on the connecting pipes.

[0016] A temperature sensor 23 is installed on the catalyst housing 21 to detect the exhaust gas temperature at the front end of the catalyst 222. The detected exhaust gas temperature is used to control the heating power of the electric heating tube 12 and the opening and closing of the valves connecting the cooling system pipes.

[0017] The working principle of this utility model: Motor vehicle exhaust gas enters the filter housing 11 and is deflected by the baffle 14, causing large particulate impurities to deposit. It then passes through the high-efficiency filter 13, which intercepts small particulate impurities. After passing through the catalyst 222, harmful gases in the exhaust gas are converted into harmless substances and discharged from the catalyst housing 21. During this process, the temperature sensor 23 can detect the exhaust gas temperature at the front end of the catalyst 222. When the temperature is lower than the set value, the electric heating tube 12 is activated, which simultaneously radiates heat to the exhaust gas and the catalyst assembly 2 to shorten the catalyst heating time during cold starts and improve catalytic efficiency. When the temperature sensor 23 detects that the exhaust gas temperature is higher than the set value, the electric valve on the cooling system connection pipe is opened, and the coolant flows through the catalyst device 22 to cool the catalyst 222.

Claims

1. A motor vehicle exhaust purification device, characterized in that, It includes a filter assembly (1) and a catalyst assembly (2), which are sealed together; the filter assembly (1) includes a filter housing (11), which has several baffles (14) inside; the filter housing (11) also has a high-efficiency filter (13) and an electric heating tube (12) installed inside; the catalyst assembly (2) includes a catalyst housing (21), which has a catalyst device (22) fixed inside.

2. The motor vehicle exhaust purification device according to claim 1, characterized in that, The two sides of the baffle (14) are fixedly connected to the inner wall of the filter housing (11). The height of the baffle (14) is less than the internal height of the filter housing (11), and the baffles (14) are staggered vertically.

3. The motor vehicle exhaust purification device according to claim 2, characterized in that, A sealing cover plate (112) is hinged to the filter housing (11). The sealing cover plate (112) is located below the baffle plate (14). The sealing cover plate (112) is provided with a locking buckle for locking. A sealing strip is attached inside the sealing cover plate (112). After the sealing cover plate (112) is locked, it can form a sealed contact with the filter housing (11) and the baffle plate below.

4. The motor vehicle exhaust purification device according to claim 1, characterized in that, The filter housing (11) is provided with a limiting track (111) inside.

5. The motor vehicle exhaust purification device according to claim 1, characterized in that, The catalytic device (22) includes a catalyst shell (221), in which the catalyst (222) is enclosed. The catalyst shell (221) is hollow. The area between the inner wall of the catalyst shell (221) and the catalyst (222) is filled with coolant. The front end of the catalyst shell (221) is provided with an inlet pipe (223), and the rear end of the catalyst shell (221) is provided with an outlet pipe (224). Both the inlet pipe (223) and the outlet pipe (224) are used to connect to the cooling system of the motor vehicle.

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