A new U-shaped DPF packaging structure
By introducing POC and DOC into the DPF, and combining a detachable design with a differential pressure sensor, the problem of insufficient DPF purification performance is solved, achieving efficient exhaust gas purification and dust removal effects, and meeting environmental regulations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TAIZHOU THREE WAY VEHICLE CATALYTIC CONVERTER CO LTD
- Filing Date
- 2025-09-28
- Publication Date
- 2026-07-31
AI Technical Summary
Existing DPF structures are insufficient to meet increasingly stringent environmental regulations in purifying exhaust particulate matter, and relying solely on POC interception and active regeneration is no longer enough to meet the standards.
By incorporating POC and DOC into the DPF structure, combined with a detachable design, differential pressure tube, and pressure sensor, active combustion cleaning is achieved, thereby improving purification performance.
By combining POC and DOC, the purification capacity of DPF is enhanced, achieving efficient capture and cleaning of exhaust gases, meeting environmental regulations, and facilitating the cleaning and maintenance of the device.
Smart Images
Figure CN224579383U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging structure, and in particular to a novel U-shaped DPF packaging structure. Background Technology
[0002] After the implementation of the China VI B emission standard, many OEMs have installed particulate filters (DPF) at the rear of the exhaust system to capture ash. The particulate filter is placed after the three-way catalytic converter and can capture carbon particulate matter before it enters the atmosphere, thereby reducing particulate matter emissions from the exhaust.
[0003] With increasingly stringent environmental regulations and stricter requirements on PM emissions from exhaust gases, relying solely on the POC (particulate oxidation catalytic converter) within the DPF for interception and active regeneration is far from meeting regulatory requirements. Therefore, it is necessary to improve the DPF structure and enhance its ability to purify and capture exhaust gases. Utility Model Content
[0004] This application provides a novel U-shaped DPF packaging structure, which improves the purification performance of the DPF by setting POC and DOC on the DPF.
[0005] The novel U-shaped DPF packaging structure provided in this application adopts the following technical solution: A novel U-shaped DPF packaging structure includes a bottom shell, which is hollow. The bottom shell has a first mounting port and a second mounting port. A first cylindrical body is mounted on the first mounting port, and a second cylindrical body is mounted on the second mounting port. The first and second cylindrical bodies are connected through the inner cavity of the bottom shell. A POC (Potentially Oriented Container) is disposed inside the first cylindrical body, and a first end cap is disposed above the first cylindrical body, with an air outlet on the first end cap. A DOC (Potentially Oriented Container) is disposed inside the second cylindrical body, and a second end cap is disposed on the second end cap, with an air inlet on the second end cap.
[0006] Preferably, a flange one is provided on the top of the second cylinder; a flange two is provided on the top of the POC, and the flange two is located above the flange one; a flange three is provided on the first end cover, and the flange three is located above the flange two; a first sealing element is provided between flange one and flange two, and a first sealing element is also provided between flange two and flange three; a plurality of connecting parts are provided on the first cylinder, and the connecting parts are used to connect flange one, flange two, flange three and the two first sealing parts.
[0007] Preferably, the connector includes a bolt and a nut, and the first sealing element is a graphite gasket.
[0008] Preferably, the bottom shell is provided with a differential pressure tube one, which is connected to the air inlet of the POC; the first end cap is provided with a differential pressure tube two, which is connected to the air outlet of the POC; and pressure sensors are provided inside both the differential pressure tube one and the differential pressure tube two.
[0009] Preferably, the second cylinder includes a cylinder seat and a receiving cylinder, the DOC is disposed inside the receiving cylinder, and the second end cap is disposed on the top of the receiving cylinder; the cylinder seat is fixedly sleeved on the receiving cylinder, and the cylinder seat is connected to the bottom shell.
[0010] Preferably, the cylinder seat includes a clamping ring, multiple sleeves, two connecting pipes, and a second sealing element. One of the connecting pipes is connected to a second mounting port, and the other connecting pipe is connected to a receiving cylinder. The sleeves clamp and fix the two connecting pipes, and the clamping ring is fitted around the outside of the multiple sleeves. The second sealing element is located between the two connecting pipes, and the two connecting pipes press the second sealing element against the outer wall of the receiving cylinder.
[0011] Preferably, the second sealing element is a graphite sealing ring, and the second sealing element is sleeved on the receiving cylinder.
[0012] Preferably, a temperature sensor is provided on the bottom shell, and the sensing connector of the temperature sensor is located below the cylinder.
[0013] The main technical effects of this utility model are reflected in the following aspects: 1. This utility model improves the purification performance of DPF by setting POC and DOC on DPF; 2. This utility model, by setting a detachable structure, allows the POC to be removed from the bottom shell for cleaning without damaging the bottom shell when needed; 3. This utility model is equipped with two differential pressure tubes and a pressure sensor, which, together with differential pressure sensors and other devices in automobiles, enable active combustion and ash removal inside the DPF. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of the DPF in this application.
[0015] Figure 2 This is a schematic diagram of the bottom shell structure.
[0016] Figure 3 yes Figure 1 A cross-sectional view of the DPF along line AA.
[0017] Figure 4 yes Figure 3 A magnified view of a section at point B.
[0018] Figure 5 yes Figure 1 A cross-sectional view of the DPF along the CC line.
[0019] Figure 6 yes Figure 5 A magnified view of a section at point D.
[0020] Reference numerals in the attached drawings: 1. Bottom shell; 11. First cylinder; 12. POC; 13. First end cap; 131. Air outlet; 14. Flange 1; 15. Flange 2; 16. Flange 3; 17. Differential pressure pipe 1; 18. Differential pressure pipe 2; 2. First sealing element; 3. Connecting element; 31. Bolt; 32. Nut; 4. Second cylinder; 41. Receiving cylinder; 42. DOC; 43. Second end cap; 431. Air inlet; 5. Cylinder seat; 51. Hoop; 52. Jacket; 53. Connecting pipe; 54. Second sealing element; 6. Temperature sensor; 71. First mounting port; 72. Second mounting port. Detailed Implementation
[0021] The present application will be further described in detail below with reference to the accompanying drawings, so that the technical solution of the present application can be more easily understood and mastered.
[0022] Reference Figures 1-4 This embodiment presents a novel U-shaped DPF packaging structure. The bottom shell 1 is hollow, and a first mounting port 71 is provided on one side of the bottom shell 1. A first cylindrical body 11, which is square, is welded to the first mounting port 71. A flange 14 is welded to the top of the first cylindrical body 11. A POC 12 is placed inside the first cylindrical body 11, and a second flange is welded to the top of the POC 12, located above the first flange. A first end cap 13 is provided above the first cylindrical body 11, and an air outlet 131 is provided on the first end cap 13. A third flange is welded to the first end cap 13, located above the second flange.
[0023] Reference Figures 1-3 A first sealing element 2 is placed between the first flange and the second flange, and a first sealing element 2 is also placed between the second flange and the third flange. The first sealing element 2 is a graphite gasket made of graphite and tinplate.
[0024] Reference Figures 1-4This application's novel U-shaped DPF encapsulation structure also includes a connector 3 for connecting flange 14, flange 2 15, flange 3 16, and two first seals 2. The connector includes multiple bolts 31 and multiple nuts 32. The threads of the bolts 31 pass through flange 14, flange 2 15, flange 3 16, and the two first seals 2. The nuts 32 are located below flange 14 and connected to the threads of the bolts 31. The multiple bolts 31 and multiple nuts 32 secure the first, second, and third flanges, and also facilitate the later disassembly of the POC12 for cleaning with professional equipment, aiding in the manual regeneration of the device.
[0025] Reference Figures 1-4 A differential pressure tube 17 is welded to the bottom shell 1, and the differential pressure tube 17 is connected to the air inlet of POC12. A differential pressure tube 2 18 is welded to the first end cover 13, and the differential pressure tube 2 18 is connected to the air outlet 131 on the first end cover 13; both differential pressure tubes 17 and 18 are equipped with pressure sensors. A differential pressure sensor is installed on the vehicle, and the differential pressure sensor reads the pressure from the two pressure sensors.
[0026] When the ash content of POC12 is too high, it will cause blockage. Once blocked, the pressure difference sensed by the pressure sensors in the two differential pressure tubes will increase. When the differential pressure sensor reads that the pressure difference exceeds the theoretical threshold, the differential pressure sensor will send a signal to the ECU on the car. The ECU will then control the engine timing mechanism to deflect the ignition angle by 2-3°, allowing more fuel and oxygen mixture to enter the particulate filter for combustion, thus cleaning the ash in the particulate filter.
[0027] Reference Figure 1 , Figure 2 , Figure 5 and Figure 6 The bottom shell 1 is also provided with a second mounting port 72, and a second cylinder 4 is provided on the second mounting port 72. The second cylinder 4 includes a cylinder base 5 and a receiving cylinder 41. A DOC42 (oxidation catalytic converter) is inserted into the receiving cylinder 41, and a second end cap 43 is provided at the top of the cylinder. An air inlet 431 is opened on the second end cap 43. The cylinder base 5 is fixedly sleeved on the receiving cylinder 41, and the cylinder base 5 is connected to the bottom shell 1.
[0028] Reference Figure 1 , Figure 2 , Figure 5 and Figure 6The cylinder base 5 includes a clamping ring 51, four sleeves 52, two connecting pipes 53, and a second sealing element 54. One connecting pipe 53 is welded to the second mounting port 72, and the other connecting pipe 53 is welded to the receiving cylinder 41. The four sleeves 52 clamp and fix the two connecting pipes 53, and the clamping ring 51 is fitted around the outside of the four sleeves 52. The second sealing element 54 is located between the two connecting pipes 53. The second sealing element 54 is a graphite sealing ring, and it is fitted onto the receiving cylinder 41. The two connecting pipes 53 press the second sealing element 54 against the outer wall of the receiving cylinder 41.
[0029] Reference Figure 1 , Figure 2 , Figure 5 and Figure 6 Meanwhile, a temperature sensor 6 is installed on the bottom shell 1, with its sensor connector extending into the shell and positioned below the receiving cylinder 41. Vehicle exhaust gas enters the DOC 42 through the second end cap 43 for the first catalytic treatment, and then passes through the bottom shell 1 into the POC 12 for the second treatment. The temperature sensor 6 is installed to monitor the exhaust gas temperature in real time, preventing excessively high exhaust gas temperatures from damaging the catalyst inside the DOC 42.
[0030] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.
Claims
1. A new U-shaped DPF packaging structure, characterized by: Includes a bottom shell (1), which has a hollow structure. The bottom shell (1) is provided with a first mounting port (71) and a second mounting port (72). A first cylinder (11) is provided on the first mounting port (71), and a second cylinder (4) is provided on the second mounting port. The first cylinder (11) and the second cylinder (4) are connected through the inner cavity of the bottom shell (1). A POC (12) is provided inside the first cylinder (11), and a first end cap (13) is provided above the first cylinder (11). An air outlet (131) is provided on the first end cap (13). A DOC (42) is provided inside the second cylinder (4), and a second end cap (43) is provided on the second end cap (43). An air inlet (431) is provided on the second end cap (43).
2. The novel U-shaped DPF packaging structure according to claim 1, characterized in that: The second cylindrical body (4) is provided with a flange one (14) at the top; the POC (12) is provided with a flange two (15) at the top, and the flange two (15) is located above the flange one (14); the first end cover (13) is provided with a flange three (16), and the flange three (16) is located above the flange two (15); a first sealing element (2) is provided between flange one (14) and flange two (15), and a first sealing element (2) is also provided between flange two (15) and flange three (16); a number of connecting parts (3) are provided on the first cylindrical body (11), and the connecting parts (3) are used to connect flange one (14), flange two (15), flange three (16) and two first sealing parts (2).
3. The novel U-shaped DPF packaging structure according to claim 2, characterized in that: The connector (3) includes a bolt (31) and a nut (32), and the first seal (2) is a graphite gasket.
4. The novel U-shaped DPF packaging structure according to claim 1, characterized in that: The bottom shell (1) is provided with a differential pressure tube one (17), which is connected to the air inlet of POC (12); the first end cap (13) is provided with a differential pressure tube two (18), which is connected to the air outlet of POC (12); both differential pressure tube one (17) and differential pressure tube two (18) are provided with pressure sensors.
5. The novel U-shaped DPF packaging structure according to claim 1, characterized in that: The second cylinder (4) includes a cylinder seat (5) and a receiving cylinder (41). The DOC (42) is disposed inside the receiving cylinder (41), and the second end cap (43) is disposed on the top of the receiving cylinder (41). The cylinder seat (5) is fixedly sleeved on the receiving cylinder (41), and the cylinder seat (5) is connected to the bottom shell (1).
6. The novel U-shaped DPF packaging structure according to claim 5, characterized in that: The cylinder seat (5) includes a clamp (51), multiple sleeves (52), two connecting pipes (53), and a second sealing element (54). One of the connecting pipes (53) is connected to the second mounting port (72), and the other connecting pipe (53) is connected to the receiving cylinder (41). The sleeves (52) clamp and fix the two connecting pipes (53), and the clamp (51) is sleeved on the outside of the multiple sleeves (52). The second sealing element (54) is located between the two connecting pipes (53), and the two connecting pipes (53) press the second sealing element (54) against the outer wall of the receiving cylinder (41).
7. The novel U-shaped DPF packaging structure according to claim 6, characterized in that: The second seal (54) is a graphite seal ring, and the second seal (54) is sleeved on the containing cylinder (41).
8. The novel U-shaped DPF packaging structure according to claim 1, characterized in that: The bottom shell (1) is provided with a temperature sensor (6), and a sensing joint of the temperature sensor (6) is located below the second cylinder body (4).