Particulate matter filter and engine with particulate matter filter

Abstract

The utility model discloses a particulate matter filter and an engine with the particulate matter filter. The particulate matter filter comprises a shell, a main flow channel and branch flow channels. The first end of the shell is provided with a fluid inlet, and the second end of the shell is provided with a fluid outlet; the main runner is arranged in the shell, the upstream of the main runner is close to the fluid inlet and communicated with the fluid inlet, and the downstream of the main runner is close to the fluid outlet and communicated with the fluid outlet; a filtering part for filtering impurities in fluid is arranged in the main flow channel; the branch flow channel is arranged in the shell and located on one side outside the main flow channel, the upstream of the branch flow channel is close to the fluid inlet and communicates with the fluid inlet, and the downstream of the branch flow channel is close to the fluid outlet and communicates with the fluid outlet; the branch flow channels are used for being opened when the main flow channel is blocked and / or the fluid exceeds a certain flow. The engine is provided with the particulate matter filter. The particulate matter filter disclosed by the utility model can improve the flow of fluid and / or reduce the resistance of the fluid when the flow exceeds a certain value.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicles, and in particular relates to a particle filter and an engine with the particle filter. Background Art

[0002] When a conventional coolant particulate filter becomes partially or completely clogged, it often impacts the normal operation of downstream equipment (for example, engines, including fuel cell engines), and in severe cases, can even damage downstream equipment. Furthermore, under conditions of excessive coolant flow, the pressure drop (resistance) across the coolant particulate filter is high, resulting in a reduction in fluid flow. Furthermore, because the degree of coolant particulate filter clogging cannot be directly detected by the controller (ECU), the controller is unable to detect the presence and / or extent of filter clogging in real time. Utility Model Content

[0003] The purpose of the present invention is to address the deficiencies of the prior art and provide a particulate filter and an engine having the particulate filter, which can increase fluid flow and / or reduce resistance when the fluid exceeds a certain flow rate.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a particulate filter, comprising a shell, a main channel and a branch channel; wherein the first end of the shell is provided with a fluid inlet, and the second end of the shell is provided with a fluid outlet; the main channel is arranged in the shell, the upstream of the main channel is close to the fluid inlet and is connected to the fluid inlet, and the downstream of the main channel is close to the fluid outlet and is connected to the fluid outlet; a filter part for filtering impurities in the fluid is provided inside the main channel; the branch channel is arranged in the shell and is located on one side outside the main channel, the upstream of the branch channel is close to the fluid inlet and is connected to the fluid inlet, and the downstream of the branch channel is close to the fluid outlet and is connected to the fluid outlet; the branch channel is used to open when the main channel is blocked and / or the fluid exceeds a certain flow rate.

[0005] Further, the particulate matter filter includes a first switch part and a position sensor; wherein, the first switch part includes a first valve body, a first shaft body and a first elastomer; the first valve body is movably arranged inside the branch flow channel for opening and / or closing the branch flow channel; the first shaft body is movably arranged in the branch flow channel, the side of the first shaft body is fixedly connected to the bottom of the first valve body, and the end of the first shaft body passes through the first elastomer and is fixedly connected to the position sensor; the first elastomer is arranged on the side wall of the shell, the first end of the first elastomer is fixedly connected to the first shaft body, and the second end of the first elastomer is fixedly connected to the side wall of the shell; the position sensor is arranged outside the shell, the position sensor includes a sensor housing and a sensor inner body, the sensor inner body is rotatably arranged inside the sensor housing, and the sensor inner body is fixedly connected to the end of the first shaft body; the position sensor is used to generate a corresponding position signal according to the rotation angle of the sensor inner body.

[0006] Furthermore, the particulate matter filter includes a first controller, the first controller is electrically connected to the position sensor, and the first controller is used to detect the opening angle of the first valve body according to the position signal of the position sensor.

[0007] Further, the particulate matter filter includes a second switch part and a pressure difference sensor; wherein, the second switch part includes a second valve body, a second shaft body and a second elastomer; the second valve body is movably arranged inside the branch flow channel for opening and / or closing the branch flow channel; the second shaft body is movably arranged in the branch flow channel, the side of the second shaft body is fixedly connected to the bottom of the second valve body, and the end of the second shaft body is fixedly connected to the first end of the second elastomer; the second elastomer is arranged on the side wall of the shell, and the second end of the second elastomer is fixedly connected to the side wall of the shell; the pressure difference sensor is arranged outside the shell, the first port of the pressure difference sensor is connected to the first position in the branch flow channel through the first tube body, and the second port of the pressure difference sensor is connected to the second position in the branch flow channel through the second tube body, the first position and the second position are respectively located on both sides of the outside of the second valve body in the branch flow channel, and the pressure difference sensor is used to generate a pressure difference signal according to the pressure difference between the first position and the second position.

[0008] Furthermore, the particulate matter filter includes a second controller electrically connected to the pressure difference sensor, and the second controller is used to detect the opening and / or closing state of the second valve body according to the pressure difference signal of the pressure difference sensor.

[0009] Furthermore, the filter portion is configured as a mesh cylinder with one end open, the open end of the mesh cylinder contacts the inner wall of the shell near the downstream of the main channel, and the closed end of the mesh cylinder opposite to the open end is configured near the upstream of the main channel.

[0010] Furthermore, a sealing ring is provided at the contact point between the open end of the mesh cylinder and the inner wall of the shell close to the downstream of the main flow channel.

[0011] Furthermore, the downstream of the branch flow channel is communicated with the fluid outlet through the main flow channel and the filter portion.

[0012] Furthermore, the first elastic body is a plate spring.

[0013] Furthermore, the second elastic body is a plate spring.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The particle filter of the present invention is provided with a branch flow channel, which can increase the fluid flow rate of the particle filter and / or reduce the resistance of the fluid when it exceeds a certain flow rate when the filter part is not blocked, partially blocked and / or completely blocked, thereby not affecting the normal operation of downstream equipment and increasing the service life of downstream equipment.

[0016] 2. The particulate matter filter of the present invention is provided with a first switch portion and a position sensor. The position signal generated in real time by the position sensor can be used to simply and efficiently detect the opening angle of the first valve body.

[0017] 3. The particulate filter of the present invention is provided with a first controller, which can determine whether the filter part is blocked and / or the degree of blockage in real time according to the detected opening angle of the first valve body, and then make an early warning and / or prompt to facilitate maintenance. After the first controller detects that the filter part is blocked, it can make corresponding control logic, thereby reducing the fluid flow, reducing the system power and / or controlling in advance to ensure the stable output of the system with the greatest capacity.

[0018] 4. The particulate matter filter of the present invention is provided with a second switch portion and a pressure difference sensor. The pressure difference signal generated in real time by the pressure difference sensor can be used to simply and efficiently detect the opening and / or closing state of the second valve body.

[0019] 5. The particulate filter of the present invention is provided with a second controller, which can determine whether the filter part is blocked and / or the degree of blockage in real time according to the detected opening and / or closing status of the second valve body, and then make early warnings and / or prompts to facilitate maintenance. After the first controller detects that the filter part is blocked, it can make corresponding control logic, thereby reducing the fluid flow, reducing the system power and / or controlling in advance to ensure the stable output of the system with the greatest capacity.

[0020] 6. The particle filter of the utility model has a simple structure, is easy to use, has a wide range of applications, and is economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a specific embodiment of the particulate filter of the present invention is shown;

[0022] Figure 2 A partial cross-sectional schematic diagram of a specific embodiment of the particulate filter of the present invention is shown;

[0023] Figure 3 A partial cross-sectional schematic diagram of another specific embodiment of the particulate filter of the present invention is shown;

[0024] Figure 4 A partial cross-sectional schematic diagram showing a specific embodiment of the connection between the first switch portion of the particulate filter and the position sensor of the present invention;

[0025] Figure 5 An exploded schematic diagram of a specific embodiment of a first switch portion and a position sensor of a particulate matter filter of the present invention is shown;

[0026] Figure 6 FIG2 shows a structural schematic diagram of another specific embodiment of the particulate filter of the present invention.

[0027] Among them, 1-shell; 11-side wall; 12-inner wall; 2-main channel; 3-branch channel; 31-first position; 32-second position; 4-fluid inlet; 5-fluid outlet; 6-filter part; 61-open end; 62-closed end; 7-first switch part; 71-first valve body; 72-first shaft body; 721-end part; 722-step shaft part; 73-first elastic body; 8-position sensor; 9-second switch part; 91-second valve body; 92-second shaft body; 10-pressure difference sensor; 101-first tube body; 102-second tube body. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0029] The directional terms used in this invention, such as "inside," "outside," "upstream," and "downstream," are used only for reference to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding the invention, and are not intended to limit the invention.

[0030] like Figures 1 to 3 As shown, Figure 6 As shown, the particle filter proposed by the present invention includes: a housing 1, a main flow channel 2 and a branch flow channel 3.

[0031] A fluid inlet 4 is provided at a first end of the housing 1 , and a fluid outlet 5 is provided at a second end of the housing 1 .

[0032] The main channel 2 is disposed within the housing 1. The upstream portion of the main channel 2 is adjacent to and communicates with the fluid inlet 4, and the downstream portion of the main channel 2 is adjacent to and communicates with the fluid outlet 5. A filter 6 is disposed within the main channel 2 for filtering impurities in the fluid.

[0033] Branch channel 3 is disposed within housing 1 and is located on a side outside main channel 2. The upstream portion of branch channel 3 is adjacent to and communicates with fluid inlet 4, while the downstream portion of branch channel 3 is adjacent to and communicates with fluid outlet 5. Branch channel 3 is designed to open when main channel 2 is blocked and / or when the fluid exceeds a certain flow rate.

[0034] Among them, when the filter part 6 is blocked, the branch channel 3 opens, and the fluid entering the fluid inlet 4 can pass through the branch channel 3 and flow out of the fluid outlet 5, thereby ensuring the flow rate of the particulate filter. When the fluid entering the fluid inlet 4 exceeds a certain flow rate, the branch channel 3 opens, and at least part of the fluid can pass through the branch channel 3 and flow out of the fluid outlet 5, thereby increasing the flow rate of the particulate filter. By using the branch channel 3, when the filter part 6 is not blocked, partially blocked and / or completely blocked, the fluid flow rate of the particulate filter can be increased and / or the resistance of the fluid when it exceeds a certain flow rate can be reduced, thereby not affecting the normal operation of downstream equipment.

[0035] In a specific embodiment, Figures 1 to 5 As shown, the particulate filter includes a first switch unit 7 and a position sensor 8.

[0036] The first switch unit 7 includes a first valve body 71 , a first shaft 72 and a first elastic body 73 .

[0037] The first valve body 71 is movably disposed inside the branch flow channel 3 for opening and / or closing the branch flow channel 3 .

[0038] The first shaft body 72 is movably disposed in the branch flow channel 3 , the side of the first shaft body 72 is fixedly connected to the bottom of the first valve body 71 , and the end 721 of the first shaft body 72 passes through the first elastic body 73 and is fixedly connected to the position sensor 8 .

[0039] The first elastic body 73 is disposed on the side wall 11 of the housing 1 . A first end of the first elastic body 73 is fixedly connected to the first shaft 72 , and a second end of the first elastic body 73 is fixedly connected to the side wall 11 of the housing 1 .

[0040] Position sensor 8 is disposed outside housing 1 and includes a sensor housing 81 and a sensor body. The sensor body is rotatably disposed within sensor housing 81 and is fixedly connected to end 721 of first shaft 72. Position sensor 8 generates a position signal corresponding to the rotation angle of the sensor body.

[0041] Among them, after the filter part 6 is slightly blocked or completely blocked, the fluid entering the fluid inlet 4 passes through the branch channel 3 and the first valve body 71. When the pressure (impact force) of the fluid on the first valve body 71 exceeds the pre-tightening force of the first elastic body 73, the fluid drives the first valve body 71 to rotate a certain angle along the first shaft body 72. The stepped shaft portion 722 and the end portion 721 on the first shaft body 72 simultaneously drive the first elastic body 73 and the sensor inner body of the position sensor 8 to rotate by the same angle. At this time, the position sensor 8 will generate a position signal corresponding to the rotation of the first valve body 71. When the fluid flow decreases (or stops), the first elastic body 73 drives the first valve body 71 and the sensor inner body of the position sensor 8 to return to a new position (or zero position) in the opposite direction along the first shaft body 72 based on the elastic restoring force. At this time, the position sensor 8 will generate a new position signal (or zero position signal) corresponding to the rotation of the first valve body 71. The opening amount (rotation angle) of the first valve body 71 is related to the fluid flow rate and / or the degree of blockage in the filter 6. The greater the fluid flow rate and / or the more severe the blockage in the filter 6, the greater the opening amount of the first valve body 71, and the position sensor 8 generates a larger position signal. At rated flow and / or when the filter 6 is completely unblocked, the first valve body 71 is not opened. At low flow and / or when the filter 6 is slightly blocked, the first valve body 71 is also not opened. The opening angle of the first valve body 71 varies depending on the flow rate and / or the degree of blockage in the filter 6. At excess flow, even if the filter 6 is unblocked, the first valve body 71 automatically opens, thereby increasing the flow rate through the entire particulate filter. Thus, when the fluid passes through the particulate filter, resistance is generated due to the presence of the filter 6. Therefore, the greater the flow rate and / or the greater the degree of blockage, the greater the resistance (and it increases exponentially). When the resistance exceeds the preload of the first elastic member 73, the first valve body 71 opens, and the position sensor 8 generates a position signal. The flow rate within the particulate filter is then dispersed, and the resistance generated by the filter unit 6 is reduced, thus maintaining a force balance. If the flow rate and / or the degree of clogging changes at this time, the first elastic member 73 will adjust accordingly to maintain the force balance, and the position sensor 8 will generate a new position signal.

[0042] In one specific embodiment, the particulate filter includes a first controller. The first controller is electrically connected to the position sensor 8 and is configured to detect the opening angle of the first valve body 71 based on the position signal from the position sensor 8. Based on the detected opening angle of the first valve body 71, the first controller can determine whether the filter unit 6 is clogged and / or the degree of clogs, and accordingly issue warnings and / or prompts to facilitate maintenance. Upon detecting that the filter unit 6 is clogged, the first controller can implement corresponding control logic, such as reducing fluid flow, reducing system power, and / or preemptively controlling to maximize capacity and ensure stable system output.

[0043] In a specific embodiment, Figure 6 As shown, the particulate filter includes a second switch unit 9 and a pressure difference sensor 10.

[0044] The second switch unit 9 includes a second valve body 91 , a second shaft body 92 and a second elastic body.

[0045] The second valve body 91 is movably disposed inside the branch flow channel 3 for opening and / or closing the branch flow channel 3 .

[0046] The second shaft body 92 is movably disposed in the branch flow channel 3 , a side portion of the second shaft body 92 is fixedly connected to the bottom of the second valve body 91 , and an end portion of the second shaft body 92 is fixedly connected to the first end of the second elastic body.

[0047] The second elastic body is disposed on the side wall 11 of the housing 1 , and a second end of the second elastic body is fixedly connected to the side wall 11 of the housing 1 .

[0048] The first port of the pressure differential sensor 10 is connected to a first position 31 in the branch channel 3 via a first tube 101, and the second port of the pressure differential sensor 10 is connected to a second position 32 in the branch channel 3 via a second tube 102. The first position 31 and the second position 32 are located on opposite sides of the exterior of the second valve body 91. The pressure differential sensor 10 is configured to generate a pressure differential signal based on the pressure difference between the first position 31 and the second position 32.

[0049] When the filter unit 6 is slightly or completely blocked, the fluid entering the fluid inlet 4 passes through the branch channel 3 and the second valve body 91. When the pressure (impact force) of the fluid on the second valve body 91 exceeds the preload force of the second elastic body, the fluid drives the second valve body 91 to rotate a certain angle along the second shaft 92. The end of the second shaft 92 also drives the second elastic body to rotate the same angle. The second valve body 91 is in the open state. At this time, the pressure difference between the first position 31 and the second position 32 is zero, and the pressure difference signal of the pressure difference sensor 10 is zero. When the fluid flow decreases, the second elastic body drives the second valve body 91 back to a new position in the opposite direction along the second shaft 92 based on the elastic recovery force. If the second valve body 91 is still in the open state, the pressure difference between the first position 31 and the second position 32 remains zero, and the pressure difference signal of the pressure difference sensor 10 remains zero. When no fluid flows through the branch channel 3, although the second valve body 91 is not open, the pressure difference between the first position 31 and the second position 32 remains zero, and the pressure difference signal of the pressure difference sensor 10 remains zero. When fluid flows into the branch channel 3, but the pressure (impact force) of the fluid on the second valve body 91 does not reach the preload force of the second elastic body, although the second valve body 91 is in a closed state, there is a pressure difference between the first position 31 and the second position 32, and the pressure difference signal of the pressure difference sensor 10 is no longer zero. For example, when the rated flow rate and / or the filter part 6 is completely unblocked, the second valve body 91 is in a closed state. When the flow rate is small and / or the filter part 6 is slightly blocked, the second valve body 91 is also in a closed state. In this way, the open and / or closed state of the second valve body 91 can be detected by the pressure difference sensor 10. For example, if the pressure difference signal of the pressure difference sensor 10 is zero, the second valve body 91 may be in an open state, or there is no fluid in the branch channel 3. If the pressure difference signal of the pressure difference sensor 10 is not zero, the second valve body 91 is in a closed state.

[0050] In one specific embodiment, the particulate filter includes a second controller electrically connected to the pressure differential sensor 10. The second controller is configured to detect the open and / or closed state of the second valve body 91 based on the pressure differential signal from the pressure differential sensor 10. Based on the detected open and / or closed state of the second valve body 91, the second controller can determine whether the filter unit 6 is clogged and / or the degree of clogs, and accordingly issue warnings and / or prompts to facilitate maintenance. Upon detecting that the filter unit 6 is clogged, the second controller can implement corresponding control logic, such as reducing fluid flow, reducing system power, and / or preemptively controlling the system to maximize capacity and ensure stable output.

[0051] In a specific embodiment, Figure 3As shown, the filter portion 6 is configured as a mesh cylinder with one end open. The open end 61 of the mesh cylinder contacts the inner wall 12 of the housing 1 near the downstream of the main flow channel 2. The closed end 62 of the mesh cylinder, opposite to the open end 61, is positioned near the upstream of the main flow channel 2. The mesh cylinder and its positioning can improve the filtering effect of impurities in the fluid, and the structure is simple and easy to use.

[0052] In a specific embodiment, Figure 3 As shown, a sealing ring is provided at the contact point between the open end 61 of the mesh cylinder and the inner wall 12 of the shell 1 near the downstream of the main channel 2, which can improve the sealing effect and further improve the filtering effect of impurities in the fluid.

[0053] In a specific embodiment, Figure 3 As shown, the downstream of the branch channel 3 is connected to the fluid outlet 5 through the main channel 2 and the filter portion 6, which can improve the filtering effect of fluid impurities in the branch channel 3.

[0054] In a specific embodiment, Figure 2 、 Figure 4 、 Figure 5 As shown, the first elastic body 73 is a plate spring with a simple structure and easy use.

[0055] In a specific embodiment, the second elastic body is a plate spring with a simple structure and easy use.

[0056] In a specific embodiment, Figures 2 to 5 As shown, the first shaft 72 is a pin shaft, which has a simple structure and is easy to use.

[0057] In a specific embodiment, Figure 6 As shown, the second shaft 92 is a pin shaft, which has a simple structure and is easy to use.

[0058] In a specific embodiment, the impurities are particles and / or flocs.

[0059] When in use, the present invention utilizes the branch flow channel 3 to increase fluid flow and / or reduce resistance above a certain flow rate, even when the filter 6 is unblocked, partially blocked, or completely blocked. Furthermore, the first switch 7 and position sensor 8 can detect the opening angle of the first valve body 71, while the second switch 9 and pressure differential sensor 10 can detect the open and / or closed state of the second valve body 91.

[0060] Based on the above embodiments, the present invention further provides an engine having the above-mentioned particulate filter, wherein the particulate filter can prevent engine damage and increase the service life of the engine.

[0061] The scope of protection of the present invention is not limited to the above-described embodiments. Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the scope and spirit of the present invention. If such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A particle filter, characterized in that: include: A shell (1), a main flow channel (2) and a branch flow channel (3); wherein: The first end of the housing (1) is provided with a fluid inlet (4), and the second end of the housing (1) is provided with a fluid outlet (5); The main flow channel (2) is arranged in the housing (1); the upstream of the main flow channel (2) is close to the fluid inlet (4) and communicates with the fluid inlet (4); the downstream of the main flow channel (2) is close to the fluid outlet (5) and communicates with the fluid outlet (5); a filter part (6) for filtering impurities in the fluid is arranged inside the main flow channel (2); The branch flow channel (3) is arranged in the shell (1) and is located on a side outside the main flow channel (2); the upstream of the branch flow channel (3) is close to the fluid inlet (4) and is connected to the fluid inlet (4); the downstream of the branch flow channel (3) is close to the fluid outlet (5) and is connected to the fluid outlet (5); the branch flow channel (3) is used to open when the main flow channel (2) is blocked and / or the fluid exceeds a certain flow rate.

2. The particulate filter according to claim 1, characterized in that The particle filter comprises a first switch unit (7) and a position sensor (8); wherein: The first switch portion (7) comprises a first valve body (71), a first shaft body (72) and a first elastic body (73); The first valve body (71) is movably arranged inside the branch flow channel (3) for opening and / or closing the branch flow channel (3); The first shaft body (72) is movably arranged in the branch flow channel (3), the side of the first shaft body (72) is fixedly connected to the bottom of the first valve body (71), and the end (721) of the first shaft body (72) passes through the first elastic body (73) and is fixedly connected to the position sensor (8); The first elastic body (73) is arranged on the side wall (11) of the shell (1), the first end of the first elastic body (73) is fixedly connected to the first shaft (72), and the second end of the first elastic body (73) is fixedly connected to the side wall (11) of the shell (1); The position sensor (8) is arranged outside the shell, and the position sensor (8) comprises a sensor housing (81) and a sensor inner body. The sensor inner body is rotatably arranged inside the sensor housing (81), and the sensor inner body is fixedly connected to the end (721) of the first shaft (72); the position sensor (8) is used to generate a corresponding position signal according to the rotation angle of the sensor inner body.

3. The particulate filter according to claim 2, characterized in that The particulate matter filter comprises a first controller, the first controller is electrically connected to the position sensor (8), and the first controller is used to detect the opening angle of the first valve body (71) according to the position signal of the position sensor (8).

4. The particulate filter according to claim 2, characterized in that The particulate matter filter comprises a second switch unit (9) and a pressure difference sensor (10); wherein: The second switch portion (9) comprises a second valve body (91), a second shaft body (92) and a second elastic body; The second valve body (91) is movably arranged inside the branch flow channel (3) for opening and / or closing the branch flow channel (3); The second shaft body (92) is movably arranged in the branch flow channel (3), the side of the second shaft body (92) is fixedly connected to the bottom of the second valve body (91), and the end of the second shaft body (92) is fixedly connected to the first end of the second elastic body; The second elastic body is arranged on the side wall (11) of the shell (1), and the second end of the second elastic body is fixedly connected to the side wall (11) of the shell (1); The pressure difference sensor (10) is arranged outside the housing (1); a first port of the pressure difference sensor (10) is connected to a first position (31) in the branch flow channel (3) via a first tube (101); a second port of the pressure difference sensor (10) is connected to a second position (32) in the branch flow channel (3) via a second tube (102); the first position (31) and the second position (32) are respectively located on two sides of the outside of the second valve body (91) in the branch flow channel (3); and the pressure difference sensor (10) is used to generate a pressure difference signal according to the pressure difference between the first position (31) and the second position (32).

5. The particulate filter according to claim 4, characterized in that The particulate filter comprises a second controller, the second controller is electrically connected to the pressure difference sensor (10), and the second controller is used to detect the opening and / or closing state of the second valve body (91) according to the pressure difference signal of the pressure difference sensor (10).

6. The particulate filter according to claim 1, characterized in that The filter portion (6) is configured as a mesh cylinder with one end open, the open end (61) of the mesh cylinder being in contact with an inner wall (12) of the shell (1) close to the downstream of the main flow channel (2), and the closed end (62) of the mesh cylinder opposite to the open end (61) is configured at a position close to the upstream of the main flow channel (2).

7. The particulate filter according to claim 6, characterized in that A sealing ring is provided at the contact point between the open end (61) of the mesh cylinder and the inner wall (12) of the shell (1) close to the downstream of the main flow channel (2).

8. The particulate filter according to claim 1, characterized in that The downstream of the branch flow channel (3) is connected to the fluid outlet (5) through the main flow channel (2) and the filter portion (6).

9. The particulate filter according to claim 4, characterized in that The first elastic body (73) is a plate-shaped spring, and the second elastic body is a plate-shaped spring.

10. An engine, characterized in that: A particulate matter filter according to any one of claims 1 to 9 is provided.

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