A pressure detection device, an oil particle filter pressure detection system, and a vehicle

Abstract

The application provides a pressure detection device, an oil particle filter pressure detection system and a vehicle, and relates to the technical field of vehicles.The pressure detection device comprises a shell, a valve plate, a pressure detection assembly and a driving piece, the inside of the shell is provided with a partition plate and is divided into a first cavity and a second cavity through the partition plate, the partition plate is provided with a through hole communicating the first cavity and the second cavity, the valve plate is rotationally arranged in the through hole, the valve plate is used for sealing the through hole, the pressure detection assembly is arranged on the valve plate, the pressure detection assembly is used for detecting the gas pressure in the first cavity or the second cavity, and the driving piece is used for driving the valve plate to rotate relative to the partition plate, so that the pressure detection assembly is switched in the first cavity and the second cavity.The application effectively reduces the probability of the accuracy reduction of the pressure signal output by the pressure detection device, and further reduces the probability of the misjudgment of the vehicle-mounted computer on the GPF condition.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically, to a pressure detection device, an oil particle filter pressure detection system, and a vehicle. Background Technology

[0002] Currently, to reduce the particulate matter content in vehicle exhaust, a GPF (oil particulate filter) is often installed behind the engine and equipped with a pressure detection system for control. During operation, the pressure detection system uses the pressure signals and their difference between the front and rear pipes of the GPF to perform active regeneration and fault diagnosis.

[0003] Existing pressure detection systems include a pressure detection device with two detection chambers connected to the front and rear pipes of the GPF (Gas Power Filter), respectively. Each chamber contains a pressure detection component for detecting gas pressure. However, as this is a low-pressure detection system, high accuracy is required. Due to inherent differences in pressure detection components and variations in their accuracy, the pressure signal output by the detection device may become less accurate, thus affecting the onboard computer (ECU)'s ability to accurately diagnose the GPF condition. Summary of the Invention

[0004] In view of the above problems, the present invention provides a pressure detection device, an oil particle filter pressure detection system, and a vehicle, which effectively solves at least one aspect of the above problems.

[0005] On one hand, the present invention provides a pressure detection device, comprising:

[0006] The outer shell has an internal partition plate that divides it into a first cavity and a second cavity. The partition plate has a through hole that connects the first cavity and the second cavity.

[0007] A valve plate, which is rotatably disposed in the through hole, is used to seal the through hole;

[0008] A pressure detection component is disposed on the valve plate and is used to detect the gas pressure in the first cavity or the second cavity;

[0009] A drive unit for driving the valve plate to rotate relative to the partition plate, thereby switching the pressure detection assembly between the first chamber and the second chamber.

[0010] Optionally, the pressure detection component includes a pressure chip and a deformation diaphragm connected to each other. The pressure chip is disposed on the valve plate, and the deformation diaphragm is used to contact the gas in the first cavity or the second cavity. The pressure chip is used to acquire the pressure deformation signal of the deformation diaphragm.

[0011] Optionally, the pressure chip is also used for:

[0012] Obtain N pressure deformation signals of the first cavity or the second cavity within a preset time period, where N is a natural number greater than or equal to 2;

[0013] The gas pressure data of the first cavity or the second cavity is obtained by averaging the N pressure deformation signals of the first cavity or the second cavity.

[0014] Optionally, the pressure detection device further includes a rotating shaft assembly, the valve plate being rotatably disposed in the through hole via the rotating shaft assembly, and the driving component including a drive motor, the drive motor being drivenly connected to the rotating shaft assembly.

[0015] Optionally, the pressure detection device further includes a Hall position sensor for detecting the rotation angle of the rotor of the drive motor.

[0016] Optionally, the pressure detection device further includes an electrical connection rotator, the rotation axis of which is coaxial with the rotation axis of the valve plate. The electrical connection rotator includes a fixed part and a rotating part. The rotating part is disposed on the valve plate or the rotation axis and is communicatively connected to the pressure chip. The fixed part is disposed on the partition plate and has an output port.

[0017] On the other hand, the present invention provides a particulate filter pressure detection system, including an on-board terminal and a pressure detection device as described above. The first cavity and the second cavity of the housing of the pressure detection device are respectively used to communicate with the air inlet pipe and the air outlet pipe of the particulate filter. The on-board terminal is communicatively connected to the drive component and the pressure detection assembly of the pressure detection device.

[0018] Optionally, the vehicle-mounted terminal is used for:

[0019] When the valve plate seals the through hole of the partition plate and the pressure detection component is located in the first cavity, the first gas pressure data in the first cavity transmitted by the pressure detection component is received.

[0020] The driving component is controlled to drive the valve plate to rotate relative to the partition plate until the valve plate seals the through hole of the partition plate and the pressure detection component is located in the second cavity;

[0021] Receive the second gas pressure data in the second cavity transmitted by the pressure detection component;

[0022] The pressure difference is obtained by subtracting the first gas pressure data and the second gas pressure data.

[0023] Fault diagnosis is performed based on the pressure difference, the first gas pressure data, and the second gas pressure data.

[0024] Optionally, the vehicle-mounted terminal is further used for:

[0025] After obtaining the pressure difference value, the driving component is controlled to drive the valve plate to rotate relative to the partition plate to return to the initial state, wherein the valve plate seals the through hole of the partition plate and the pressure detection component is located in the first cavity.

[0026] In another aspect, the present invention provides a vehicle including the particulate filter pressure detection system described above.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] In use, the pressure detection device can be initially set with the valve plate sealing the through hole of the partition plate and the pressure detection component located in the first chamber. After the first and second chambers are connected to the inlet and outlet pipes of the particulate filter, respectively, the pressure detection component can detect the gas pressure in the first chamber, thus obtaining the gas pressure in the particulate filter's inlet pipe. Then, the driving component drives the valve plate to rotate relative to the partition plate until the valve plate seals the through hole of the partition plate and the pressure detection component is located in the second chamber. At this point, the pressure detection component can detect the gas pressure in the second chamber, thus obtaining the gas pressure in the particulate filter's outlet pipe. Compared to existing pressure detection devices that install a separate pressure detection component in each detection chamber, the pressure detection device of this invention, by driving the valve plate to rotate relative to the partition plate, allows the pressure detection component to switch between the first and second chambers. This allows the same pressure detection component to obtain the gas pressure in both chambers, effectively reducing the probability of decreased accuracy of the pressure signal output by the pressure detection device, and thus reducing the probability of the on-board computer (ECU) misjudging the GPF status. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the internal structure of the pressure detection device according to an embodiment of the present invention;

[0030] Figure 2 This is a cross-sectional view of the partition plate according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the connection at the valve plate in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the pressure detection system for a particulate filter according to an embodiment of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Pressure detection device; 11. Housing; 111. Divider plate; 1111. Through hole; 1112. First channel; 1113. Second channel; 112. First cavity; 113. Second cavity; 114. First connecting pipe; 115. Second connecting pipe; 12. Valve plate; 121. Rotary shaft assembly; 1211. First rotating shaft; 1212. Second rotating shaft; 13. Pressure detection assembly; 131. Pressure chip; 132. Deformation diaphragm; 14. Drive component; 15. Hall position sensor; 16. Electrical connection rotator; 2. Vehicle terminal; 3. Particulate filter; 31. Inlet pipe; 32. Outlet pipe. Detailed Implementation

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0037] Furthermore, in the attached diagram, the Z-axis represents the vertical direction, that is, the up-down position, and the positive direction of the Z-axis (that is, the direction the arrow points on the Z-axis) indicates up, and the negative direction of the Z-axis indicates down; in the attached diagram, the X-axis represents the horizontal direction, that is, the left-right position, and the positive direction of the X-axis (that is, the direction the arrow points on the X-axis) indicates right, and the negative direction of the X-axis indicates left; in the attached diagram, the Y-axis represents the vertical direction, that is, the front-back position, and the positive direction of the Y-axis (that is, the direction the arrow points on the Y-axis) indicates front, and the negative direction of the Y-axis indicates back.

[0038] It should also be noted that the meanings of the aforementioned Z-axis, X-axis and Y-axis are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0039] like Figure 1 , 2As shown in Figure 3, the pressure detection device 1 of this embodiment includes a housing 11, a valve plate 12, a pressure detection component 13, and a drive member 14. The housing 11 has a partition plate 111 inside, which divides the housing into a first cavity 112 and a second cavity 113. The partition plate 111 has a through hole 1111 connecting the first cavity 112 and the second cavity 113. The valve plate 12 is rotatably disposed in the through hole 1111 and is used to seal the through hole 1111. The pressure detection component 13 is disposed on the valve plate 12 and is used to detect the gas pressure in the first cavity 112 or the second cavity 113. The drive member 14 is used to drive the valve plate 12 to rotate relative to the partition plate 111, so that the pressure detection component 13 switches between the first cavity 112 and the second cavity 113.

[0040] In this embodiment, the shape of the outer shell 11 is not limited; for example, it can be square, rectangular, or other irregular shapes. The shape is determined according to actual needs. Figure 1 As shown, the outer shell 11 is rectangular, and a partition plate 111 is provided inside the outer shell 11. The partition plate 111 divides the interior of the outer shell 11 into a first cavity 112 and a second cavity 113 of equal volume along the left-right direction. The partition plate 111 has a through hole 1111 in the middle position, which connects the first cavity 112 and the second cavity 113. A valve plate 12 is rotatably disposed in the through hole 1111. When the valve plate 12 is rotated to a certain position, it can seal the through hole 1111. A pressure detection component 13 is disposed on the valve plate 12. The pressure detection component 13 can detect the gas pressure in the first cavity 112 or the second cavity 113. A driving component 14 can drive the valve plate 12 to rotate relative to the partition plate 111, so that the pressure detection component 13 switches between the first cavity 112 and the second cavity 113.

[0041] In this way, when the pressure detection device 1 is in use, the initial state of the pressure detection device 1 can be set so that the valve plate 12 seals the through hole 1111 of the partition plate 111 and the pressure detection component 13 is located in the first cavity 112. After the first cavity 112 and the second cavity 113 are respectively connected to the air inlet pipe 31 and the air outlet pipe 32 of the particulate filter 3, the pressure detection component 13 can detect the gas pressure in the first cavity 112, that is, obtain the gas pressure of the air inlet pipe 31 of the particulate filter 3. Then, the driving member 14 drives the valve plate 12 to rotate relative to the partition plate 111 until the valve plate 12 seals the through hole 1111 of the partition plate 111 and the pressure detection component 13 is located in the second cavity 113. At this time, the pressure detection component 13 can detect the gas pressure in the second cavity 113, that is, obtain the gas pressure of the air outlet pipe 32 of the particulate filter 3. Compared to the existing pressure detection device 1, which installs a pressure detection component 13 in each detection chamber, the pressure detection device 1 of the present invention drives the valve plate 12 to rotate relative to the partition plate 111 via the drive member 14, which enables the pressure detection component 13 to switch between the first chamber 112 and the second chamber 113. This allows the gas pressure of the first chamber 112 and the second chamber 113 to be obtained through the same pressure detection component 13. This effectively reduces the probability of the pressure signal output by the pressure detection device 1 becoming less accurate, and thus reduces the probability of the on-board computer (ECU) misjudging the GPF status.

[0042] In this embodiment, the outer contour shape of the through hole 1111 matches the outer contour shape of the valve plate 12, such as a circle, an ellipse or a square. There are no restrictions here, and it depends on the actual needs.

[0043] In this embodiment, the outer wall of the outer shell 11 is provided with a first connecting pipe 114 and a second connecting pipe 115 protruding outwards. The first connecting pipe 114 is used to communicate with the first cavity 112, and the second connecting pipe 115 is used to communicate with the second cavity 113. In this way, when the first cavity 112 and the second cavity 113 are respectively connected to the air inlet pipe 31 and the air outlet pipe 32 of the particulate filter 3, the first connecting pipe 114 and the second connecting pipe 115 can be easily connected to the pipes, which is convenient and quick.

[0044] In other embodiments, the first cavity 112 and the second cavity 113 may also be two cavities of different volumes.

[0045] Optionally, the pressure detection component 13 includes a pressure chip 131 and a deformation diaphragm 132 connected to each other. The pressure chip 131 is disposed on the valve plate 12, and the deformation diaphragm 132 is used to contact the gas in the first chamber 112 or the second chamber 113. The pressure chip 131 is used to acquire the pressure deformation signal of the deformation diaphragm 132.

[0046] like Figure 1As shown, the pressure chip 131 is mounted on the valve plate 12. The connection between the two can be achieved by, but is not limited to, adhesive bonding or screw connection. The pressure chip 131 is connected to the deformation chip to acquire the pressure deformation signal of the deformation diaphragm 132. Specifically, the deformation diaphragm 132 is mounted on the pressure chip 131, and the two can be connected by cables, wires, or other suitable means. Thus, when the deformation diaphragm 132 is deformed by the gas pressure in the first cavity 112 or the second cavity 113, the conductive material on the deformation diaphragm 132 will be stretched or compressed, causing a change in resistance. The pressure chip 131 indirectly acquires the pressure signal by measuring this change in resistance.

[0047] In this embodiment, the pressure chip 131 typically outputs an analog voltage signal or a digital signal, which needs to be amplified, filtered, linearized, and processed by appropriate circuits to obtain a readable pressure value or an input signal for the control system.

[0048] It should be noted that the specific connection method and signal processing method may vary depending on the model and specifications of the pressure chip 131 and the deformable diaphragm 132. In practical applications, selection and adjustment should be made according to requirements to ensure accurate pressure measurement.

[0049] Optionally, the pressure chip 131 is further configured to: acquire N pressure deformation signals of the first cavity 112 or the second cavity 113 within a preset time, wherein N is a natural number greater than or equal to 2; and calculate the average value of the N pressure deformation signals of the first cavity 112 or the second cavity 113 to obtain the gas pressure data of the first cavity 112 or the second cavity 113.

[0050] In this embodiment, when the pressure detection component 13 is located in the first cavity 112, the gas from the air inlet pipe 31 of the particulate filter 3 in the first cavity 112 will cause a pressure deformation of the deformation diaphragm 132. After the pressure chip 131 detects this pressure deformation signal, it will filter and condition it accordingly and perform accumulation calculation. After detecting 10 pressure signals, the pressure chip 131 will perform an averaging algorithm. (P0-P9 are 10 pressure deformation signals received by pressure chip 131 within a preset time). Finally, the gas pressure data P1 value is output to vehicle terminal 2 to complete the collection of gas pressure in the intake pipe 31 of particulate filter 3.

[0051] Similarly, when the pressure detection component 13 is located in the second cavity 113, the gas from the outlet pipe 32 of the particulate filter 3 in the second cavity 113 will cause a pressure deformation of the deformation diaphragm 132. After the pressure chip 131 detects this pressure deformation signal, it will filter and condition it accordingly and perform accumulation calculation. After detecting 10 pressure signals, the pressure chip 131 will perform an averaging algorithm. (P0-P9 are 10 pressure deformation signals received by pressure chip 131 within ΔT time). Finally, the gas pressure data P2 value is output to vehicle terminal 2 to complete the collection of gas pressure in the gas outlet pipe 32 of particulate filter 3.

[0052] It is important to understand that the more pressure deformation signal data collected, the higher the accuracy of the gas pressure data obtained using the averaging algorithm.

[0053] In this embodiment, when the pressure chip 131 fails to acquire sufficient pressure deformation signals within a predetermined time due to system failure or other reasons, the pressure chip 131 continues to acquire pressure deformation signals through the deformation diaphragm 132 until the quantity meets the requirements.

[0054] Optionally, the pressure detection device further includes a rotating shaft assembly 121, with the valve plate 12 rotatably disposed in the through hole 1111 via the rotating shaft assembly 121. The driving component 14 includes a drive motor disposed on the outer wall of the housing 11, and the output end of the drive motor is drivenly connected to the rotating shaft assembly 121.

[0055] In this embodiment, the valve plate 12 is circular, and the rotating shaft assembly 121 includes a first rotating shaft 1211 and a second rotating shaft 1212. The first rotating shaft 1211 and the second rotating shaft 1212 are respectively disposed at the upper and lower ends of the valve plate 12. The partition plate 111 is provided with a first channel 1112 and a second channel 1113 corresponding to the first rotating shaft 1211 and the second rotating shaft 1212, respectively. The drive motor is an electric motor used to provide power. It is mounted on the outer wall of the housing 11, and the output end of the drive motor is connected to the rotating shaft through an appropriate connection method. For example, the output end of the drive motor extends into the partition plate 111 and is fixedly connected to the first rotating shaft 1211 of the valve plate 12.

[0056] In this way, the combination of the drive motor and the rotating shaft assembly 121 enables precise control of the rotation angle of the valve plate 12. This ensures accurate adjustment of the opening and closing degree of the through hole 1111. The structural design and connection method of the drive motor and the rotating shaft assembly 121 ensure high reliability of the drive system. They can withstand large torques and loads, ensuring stable movement of the valve plate 12 and stable operation over long periods. Mounting the drive motor on the outer wall of the housing 11 saves internal space and facilitates installation and maintenance of the drive motor.

[0057] Optionally, the pressure detection device also includes a Hall position sensor 15, which is used to detect the rotation angle of the rotor of the drive motor.

[0058] In this embodiment, the Hall position sensor 15 can be a Hall effect sensor or a Hall encoder. These sensors can sense magnetic fields and convert them into electrical signals. A magnet is fixed on the rotor of the drive motor. This magnet will generate a magnetic field, which the Hall sensor will sense to measure the rotor angle. During installation, the Hall position sensor 15 is installed inside the fixed part, housing, or partition plate 111 of the drive motor, corresponding to the magnet on the rotor. Ensure that the distance between the Hall position sensor 15 and the magnet is appropriate to obtain accurate measurement results. The Hall sensor is connected to the vehicle terminal 2 to transmit the rotor angle information to the vehicle system.

[0059] In use, the Hall position sensor 15 can sense the position change of the rotor in real time and quickly transmit the measurement results to the vehicle terminal 2. This allows the vehicle terminal 2 to respond quickly to changes and determine whether the valve plate 12 has rotated into position.

[0060] Meanwhile, the Hall position sensor 15 is a non-contact sensor, meaning it does not require direct contact with the rotor. This reduces failures and maintenance needs due to friction and wear, improving reliability and lifespan.

[0061] Optionally, the pressure detection device further includes an electrically connected rotator 16, the rotation axis of which is coaxial with the rotation axis of the valve plate 12. The electrically connected rotator 16 includes a fixed part and a rotating part. The rotating part is disposed on the valve plate 12 or the rotating shaft assembly 121 and is communicatively connected to the pressure chip 131. The fixed part is disposed on the partition plate 111 and is provided with an output port.

[0062] like Figure 3 As shown, the rotation axis of the electrical connection rotator 16 is coaxial with the rotation axis of the valve plate 12 in the vertical direction. The rotating part of the electrical connection rotator 16 is located inside the second rotating shaft 1212 of the rotating shaft assembly 121 and is communicatively connected to the pressure chip 131. The fixed part of the electrical connection rotator 16 is located in the second channel 1113 of the partition plate 111. The fixed part of the electrical connection rotator 16 has an output port, which can be embedded in the housing 11, thereby connecting to the vehicle terminal 2 via a data cable. In this way, when the pressure detection assembly 13 rotates with the valve plate 12, the electrical connection rotator 16 can realize the transmission of electrical signals and / or power during the rotational motion, ensuring the continuous rotation of the valve plate 12 and improving the reliability and efficiency of the electrical connection.

[0063] Another embodiment of the particulate filter pressure detection system of the present invention, such as Figure 4 As shown, it includes an on-board terminal 2 and a pressure detection device 1 as described above. The first cavity 112 and the second cavity 113 of the housing 11 of the pressure detection device 1 are respectively used to communicate with the air inlet pipe 31 and the air outlet pipe 32 of the particulate filter 3. The on-board terminal 2 is communicatively connected to the drive unit 14 and the pressure detection assembly 13 of the pressure detection device 1.

[0064] The particulate filter pressure detection system of this embodiment has the same beneficial effects as the pressure detection device 1 described above compared to the prior art, so it will not be described again here.

[0065] Optionally, the vehicle terminal 2 is configured to: receive first gas pressure data transmitted by the pressure detection component 13 in the first cavity 112 when the valve plate 12 seals the through hole 1111 of the partition plate 111 and the pressure detection component 13 is located in the first cavity 112; control the drive component 14 to drive the valve plate 12 to rotate relative to the partition plate 111 until the valve plate 12 seals the through hole 1111 of the partition plate 111 and the pressure detection component 13 is located in the second cavity 113; receive second gas pressure data transmitted by the pressure detection component 13 in the second cavity 113; obtain a pressure difference value by subtracting the first gas pressure data and the second gas pressure data; and perform fault diagnosis work based on the pressure difference value, the first gas pressure data, and the second gas pressure data.

[0066] In this way, the vehicle terminal 2 can control the operation of the electronic devices of the pressure detection device 1 and acquire the data it senses, thereby obtaining reliable first gas pressure data, second gas pressure data and the difference between the two, thus providing a reliable guarantee for the vehicle terminal 2 to perform fault diagnosis work.

[0067] Optionally, the vehicle terminal 2 is also used to: after acquiring the pressure difference value, control the drive unit 14 to drive the valve plate 12 to rotate relative to the partition plate 111 to return to the initial state, in which the valve plate 12 seals the through hole 1111 of the partition plate 111 and the pressure detection component 13 is located in the first cavity 112.

[0068] In this embodiment, after acquiring the pressure difference value, the vehicle-mounted terminal 2 controls the drive component 14 to drive the valve plate 12 to rotate relative to the partition plate 111 to return to the initial state. This achieves benefits such as automatic control, maintaining sealing, improving pressure detection accuracy, and enhancing system reliability. This helps optimize the performance and functionality of the vehicle-mounted terminal 2, providing more reliable and efficient pressure control and monitoring.

[0069] A vehicle according to another embodiment of the present invention includes the particulate filter pressure detection system described above.

[0070] The vehicle in this embodiment has the same beneficial effects as the pressure detection device 1 described above compared to the prior art, so it will not be described again here.

[0071] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A pressure detection device, characterized in that, include: The outer shell (11) has a partition plate (111) inside and is divided into a first cavity (112) and a second cavity (113) by the partition plate (111). The partition plate (111) has a through hole (1111) connecting the first cavity (112) and the second cavity (113). Valve plate (12), which is rotatably disposed in the through hole (1111), and the valve plate (12) is used to seal the through hole (1111). Pressure detection component (13), the pressure detection component (13) is disposed on the valve plate (12), the pressure detection component (13) is used to detect the gas pressure in the first cavity (112) or the second cavity (113); A drive (14) is used to drive the valve plate (12) to rotate relative to the partition plate (111) so that the pressure detection assembly (13) switches between the first cavity (112) and the second cavity (113).

2. The pressure detection device according to claim 1, characterized in that, The pressure detection component (13) includes a pressure chip (131) and a deformation diaphragm (132) connected to each other. The pressure chip (131) is disposed on the valve plate (12). The deformation diaphragm (132) is used to contact the gas in the first cavity (112) or the second cavity (113). The pressure chip (131) is used to acquire the pressure deformation signal of the deformation diaphragm (132).

3. The pressure detection device according to claim 2, characterized in that, The pressure chip (131) is also used for: Obtain N pressure deformation signals of the first cavity (112) or the second cavity (113) within a preset time, where N is a natural number greater than or equal to 2; The gas pressure data of the first cavity (112) or the second cavity (113) is obtained by averaging the N pressure deformation signals of the first cavity (112) or the second cavity (113).

4. The pressure detection device according to claim 2, characterized in that, It also includes a rotating shaft assembly (121), the valve plate (12) is rotatably disposed in the through hole (1111) through the rotating shaft assembly (121), and the driving component (14) includes a driving motor, which is drivingly connected to the rotating shaft assembly.

5. The pressure detection device according to claim 4, characterized in that, It also includes a Hall position sensor (15) for detecting the rotation angle of the rotor of the drive motor.

6. The pressure detection device according to claim 4, characterized in that, It also includes an electrical connection rotator (16), the rotation axis of which is coaxial with the rotation axis of the valve plate (12). The electrical connection rotator (16) includes a fixed part and a rotating part. The rotating part is disposed on the valve plate (12) or the rotating shaft assembly (121) and is communicatively connected to the pressure chip (131). The fixed part is disposed on the partition plate (111) and has an output port.

7. A pressure detection system for a particulate filter, characterized in that, The device includes an on-board terminal (2) and a pressure detection device as described in any one of claims 1 to 6. The first cavity (112) and the second cavity (113) of the housing (11) of the pressure detection device are respectively used to communicate with the air inlet pipe (31) and the air outlet pipe (32) of the particulate filter (3). The on-board terminal (2) is communicatively connected to the drive unit (14) and the pressure detection assembly (13) of the pressure detection device.

8. The particulate filter pressure detection system according to claim 7, characterized in that, The vehicle-mounted terminal (2) is used for: When the valve plate (12) seals the through hole (1111) of the partition plate (111) and the pressure detection component (13) is located in the first cavity (112), the first gas pressure data in the first cavity (112) transmitted by the pressure detection component (13) is received. The drive unit (14) is controlled to drive the valve plate (12) to rotate relative to the partition plate (111) until the valve plate (12) seals the through hole (1111) of the partition plate (111) and the pressure detection assembly (13) is located in the second cavity (113). Receive the second gas pressure data in the second cavity (113) transmitted by the pressure detection component (13); The pressure difference is obtained by subtracting the first gas pressure data and the second gas pressure data. Fault diagnosis is performed based on the pressure difference, the first gas pressure data, and the second gas pressure data.

9. The particulate filter pressure detection system according to claim 8, characterized in that, The vehicle-mounted terminal (2) is also used for: After obtaining the pressure difference value, the drive unit (14) is controlled to drive the valve plate (12) to rotate relative to the partition plate (111) to return to the initial state, wherein the valve plate (12) seals the through hole (1111) of the partition plate (111) and the pressure detection component (13) is located in the first cavity (112).

10. A vehicle, characterized in that, Includes a particulate filter pressure detection system as described in any one of claims 7 to 9.

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