GPF flexible metal corrugated differential pressure pipe

Abstract

The utility model relates to a GPF flexible metal corrugated differential pressure pipe which comprises a first pipeline used for connecting the upstream of a GPF and a pressure sensor. The second pipeline is used for connecting the downstream of the GPF and the pressure sensor; at least part of the first pipeline is a metal corrugated pipe, the rest of the first pipeline is a hard metal pipe, at least part of the second pipeline is a metal corrugated pipe, and the rest of the second pipeline is a hard metal pipe. According to the GPF flexible metal corrugated differential pressure pipe provided by the embodiment of the invention, the first pipeline and the second pipeline realize connection between the pressure sensor and the GPF, the first pipeline is connected between the upstream of the GPF and the pressure sensor, and the second pipeline is connected between the downstream of the GPF and the pressure sensor, so that pressure difference monitoring between the upstream and the downstream of the GPF is realized; the first pipeline is a metal corrugated pipe, the other parts of the first pipeline are hard metal pipes, the second pipeline is a metal corrugated pipe, the other parts of the second pipeline are hard metal pipes, the first pipeline and the second pipeline which are made of metal are more durable, the service life is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This application relates to the field of automotive component technology, and in particular to a GPF flexible metal bellows differential pressure pipe. Background Technology

[0002] GPF stands for Gasoline Particulate Filter, typically installed in the exhaust manifold of a vehicle to reduce the particulate matter content in its exhaust gases. Essentially, it acts as a filter in the exhaust system, intercepting particulate matter. When the particulate matter concentration in the GPF reaches a specified level, the burner within the GPF automatically ignites to burn and consume the intercepted particles. The determination of whether the intercepted particulate matter concentration has reached the specified level is achieved by measuring the pressure difference between the upstream and downstream sides of the GPF in the exhaust manifold. The more particles the GPF intercepts, the greater the resistance to airflow, resulting in increased pressure difference between the upstream and downstream sides of the GPF. The pressure difference is measured to monitor the particulate matter content in the GPF. In practice, a pressure sensor and two connecting pipes are installed. One connecting pipe connects the pressure sensor to the upstream position of the GPF in the exhaust gas channel, and the other connecting pipe connects the pressure sensor to the downstream position of the GPF in the exhaust gas channel. This allows for monitoring of the pressure difference between the upstream and downstream of the GPF. Currently, the connecting pipes are made of multi-layer fluororubber. During use, the rubber material of this type of pipe gradually ages due to the influence of high-temperature exhaust gas, requiring regular maintenance and replacement, which increases maintenance costs. Utility Model Content

[0003] The purpose of this application is to provide a GPF flexible metal corrugated differential pressure pipe with a longer service life, thereby effectively solving the shortcomings of the prior art.

[0004] Therefore, this application provides a GPF flexible metal bellows differential pressure tube, comprising:

[0005] The first pipeline is a long pipeline structure, and the first pipeline is used to connect the upstream of the GPF and the pressure sensor;

[0006] The second pipeline is a long pipeline structure, and the second pipeline is used to connect the downstream of the GPF and the pressure sensor;

[0007] Wherein, at least a portion of the first pipeline is a corrugated metal pipe and the remainder is a rigid metal pipe, and the extension length of the corrugated metal pipe portion in the first pipeline is not less than the extension length of the rigid metal pipe portion in the first pipeline; at least a portion of the second pipeline is a corrugated metal pipe and the remainder is a rigid metal pipe, and the extension length of the corrugated metal pipe portion in the second pipeline is not less than the extension length of the rigid metal pipe portion in the second pipeline.

[0008] In some possible implementations, the first pipeline includes a first section and a second section, one end of the first section is used to connect to a pressure sensor, the other end of the first section is connected to one end of the second section, and the other end of the second section is used to connect to the upstream of the GPF. The first section is a metal bellows, and the second section is a rigid metal pipe.

[0009] In some possible implementations, the first section is provided with at least one turn.

[0010] In some possible implementations, the first segment and the second segment are connected by a rubber tube sleeve.

[0011] In some possible implementations, the second pipeline includes a third section and a fourth section, one end of the third section is connected to a pressure sensor, the other end of the third section is connected to one end of the fourth section, and the other end of the fourth section is connected to the downstream of the GPF. The third section is a metal bellows, and the fourth section is a rigid metal pipe.

[0012] In some possible implementations, the third section is provided with at least one turn.

[0013] In some possible implementations, the third and fourth sections are connected by a rubber tube sleeve.

[0014] In some possible implementations, the corrugated metal sections of the first pipeline and the corrugated metal sections of the second pipeline are arranged side by side.

[0015] In some possible implementations, a support frame is also included for mounting the pressure sensor, with one end of the first pipeline and one end of the second pipeline both disposed on the support frame.

[0016] In some possible implementations, the first conduit and the pressure sensor, as well as the second conduit and the pressure sensor, are connected by rubber tubing.

[0017] According to the embodiments of this application, the GPF flexible metal corrugated differential pressure tube connects the pressure sensor and the GPF through a first pipe and a second pipe. The first pipe is connected between the upstream of the GPF and the pressure sensor, and the second pipe is connected between the downstream of the GPF and the pressure sensor, thereby enabling the monitoring of the pressure difference between the upstream and downstream of the GPF. Part of the first pipe is a metal corrugated pipe and the rest is a rigid metal pipe, and part of the second pipe is a metal corrugated pipe and the rest is a rigid metal pipe. Compared with fluororubber, the metal first and second pipes are more durable, extending their service life and reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the GPF flexible metal bellows differential pressure tube provided in the embodiments of this application;

[0019] Figure 2 This is a schematic diagram of the support frame and clips provided in the embodiments of this application;

[0020] Figure 3 An exploded view of the support frame and clips provided in the embodiments of this application. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] like Figures 1-3 As shown in the illustration, this application provides a GPF flexible metal corrugated differential pressure pipe, preferably used as an automotive component in an exhaust emission system. GPF refers to a gasoline engine particulate filter, installed in the vehicle's exhaust emission channel to filter and intercept particulate matter in the exhaust gas, reducing the particulate matter content in the emitted exhaust. When the particulate matter content intercepted by the GPF reaches a specified value, the interception effect decreases. At this time, the burner in the GPF will automatically ignite to burn and consume the intercepted particulate matter, restoring the GPF's interception effect. Determining whether the particulate matter interception amount in the GPF reaches the specified value is achieved by monitoring the pressure difference between the upstream and downstream sides of the GPF. When the particulate matter content increases, the resistance of the GPF to the airflow in the exhaust channel also increases. Therefore, the content of intercepted particulate matter can be monitored by monitoring the pressure difference between the upstream and downstream of the GPF. For this purpose, a pressure sensor 90 is usually set up, and connecting pipes are set between the upstream of the GPF and the pressure sensor 90, and between the downstream of the GPF and the pressure sensor 90, to monitor the pressure difference. The material of the connecting pipe is usually fluororubber. During use, the connecting pipe will gradually age due to the influence of high-temperature exhaust gas, and it needs to be replaced regularly, resulting in high maintenance costs. The flexible metal corrugated differential pressure pipe of GPF provided in this application aims to improve the service life of the connecting pipe and reduce the later maintenance costs.

[0023] The GPF flexible corrugated differential pressure pipe includes a first pipe and a second pipe, both of which are elongated pipe structures. Preferably, both the first and second pipes are elongated oval pipe structures. The first pipe connects the upstream of the GPF to the pressure sensor 90, and the second pipe connects the downstream of the GPF to the pressure sensor 90. It should be noted that one end of the first pipe is connected to the pressure sensor 90 and the other end is connected to the vehicle's exhaust pipe, and one end of the second pipe is connected to the pressure sensor 90 and the other end is connected to the vehicle's exhaust pipe. The upstream and downstream locations of the GPF are actually on the vehicle's exhaust pipe, and the GPF is installed at predetermined positions along the exhaust pipe. In GPF, upstream and downstream refer to the upstream and downstream of the preset position on the exhaust gas pipeline. The first and second pipelines connect the pressure sensor 90 and the exhaust gas pipeline to achieve pressure monitoring. In another example, along the exhaust gas flow direction in the exhaust gas pipeline, the GPF has an upstream end and a downstream end. One end of the first pipeline is connected to the upstream end of the GPF and the other end is connected to the pressure sensor 90. One end of the second pipeline is connected to the downstream end of the GPF and the other end is connected to the pressure sensor 90. As long as the pressure values ​​at both the upstream and downstream ends of the GPF can be monitored, it is acceptable. In the following text, upstream and downstream of the GPF refer to the upstream and downstream of the preset position on the exhaust gas pipeline.

[0024] Thus, both the first and second pipelines are elongated pipes. Preferably, at least a portion of the first pipeline is a corrugated metal pipe, and the remaining portion is a rigid metal pipe. Similarly, at least a portion of the second pipeline is a corrugated metal pipe, and the remaining portion is a rigid metal pipe. In this embodiment, both the first and second pipelines are made of metal, such as stainless steel or aluminum alloy. In high-temperature exhaust gas environments, compared to fluororubber, the first and second pipelines made of metal are more durable and have a longer service life, avoiding frequent replacements and reducing maintenance costs. Furthermore, the corrugated metal portion can undergo axial deformation and bending, eliminating deformation stress and reducing structural stress caused by vibration during vehicle operation. In this embodiment, the corrugated metal portion can be made of stainless steel or aluminum alloy, and the rigid metal pipe can also be made of stainless steel or aluminum alloy.

[0025] Preferably, the first pipeline includes a first section 101 and a second section 102. The first section 101 is a metal corrugated pipe, and the second section 102 is a rigid metal pipe. One end of the first section 101 is connected to the pressure sensor 90, and the other end of the first section 101 is connected to one end of the second section 102. The other end of the second section 102 is connected to the upstream of the GPF. The first section 101 has at least one bend. For example, the first section 101 may include a first region 1011, a second region 1012, and a third region 1013. Region 1012 and the third region 1013 are connected end to end in sequence. The first region 1011 and the second region 1012 are set at an angle, and the second region 1012 and the third region 1013 are set at an angle, so that two turns are formed on the first section 101. The plane in which the first region 1011 and the second region 1012 are located can be different from the plane in which the second region 1012 and the third region 1013 are located. In this way, the metal bellows section is more likely to deform, making the metal bellows section more capable of eliminating deformation, which is more conducive to improving the vibration stress elimination performance of the component under bumpy conditions.

[0026] The first section 101 and the second section 102 can be connected by a rubber tube sleeve. The rubber tube is sleeved on the outside of one end of the first section 101 and the outside of one end of the second section 102. The structure is simple and the connection is convenient.

[0027] Preferably, the second pipeline includes a third section 203 and a fourth section 204. The third section 203 is a corrugated metal pipe, and the fourth section 204 is a rigid metal pipe. One end of the third section 203 is connected to the pressure sensor 90, and the other end of the third section 203 is connected to one end of the fourth section 204. The other end of the fourth section 204 is connected to the downstream of the GPF. The third section 203 has at least one bend. For example, the third section 203 includes a fourth region 2034, a fifth region 2035, and a sixth region 2036. Regions 2035 and 2036 are connected end to end in sequence. Regions 2034 and 2035 are set at an angle to each other, and regions 2035 and 2036 are set at an angle to each other, so that two turns are formed on the third section 203. The plane in which regions 2034 and 2035 are located can be different from the plane in which regions 2035 and 2036 are located, making the metal corrugated pipe section more prone to deformation. The metal corrugated pipe section has a higher ability to eliminate deformation, which is more conducive to improving the vibration stress elimination performance of the component under bumpy conditions.

[0028] The third section 203 and the fourth section 204 can be connected by a rubber tube sleeve. The rubber tube is sleeved on the outside of one end of the third section 203 and the outside of one end of the fourth section 204. The structure is simple and the connection is convenient.

[0029] In some embodiments, the corrugated metal section on the first pipeline and the corrugated metal section on the second pipeline are arranged side by side, that is, the corrugated metal section on the first pipeline and the corrugated metal section on the second pipeline are arranged in parallel to form a cluster, which facilitates connection to the pressure sensor 90 and facilitates spatial layout. The corrugated metal section on the first pipeline and the corrugated metal section on the second pipeline can be reinforced together by means of straps, pipe clamps, etc.

[0030] Preferably, the GPF flexible metal corrugated differential pressure pipe further includes a support frame 300, which is used to install the pressure sensor 90. One end of the first pipeline and one end of the second pipeline are both mounted on the support frame 300.

[0031] In this embodiment, the support frame 300 can be a long and flat structure. The pressure sensor 90 is disposed on one side of the support frame 300. The pressure sensor 90 and the support frame 300 can be connected by screws. A clamp 400 is provided on the support frame 300. One end of the first pipeline and one end of the second pipeline can be detachably disposed on the side of the support frame 300 where the pressure sensor 90 is disposed via the clamp 400. Preferably, the clamp 400 is a long and flat structure. Two clamping feet 401 are provided at both ends of the clamp 400, so that the clamp 400 and the clamping feet 401 form a U-shaped structure. The ends of the clamping feet 401 are provided with barbs. Two locking slots 301 are provided through the support frame 300, and the two clamping feet 401 can be respectively inserted into the corresponding locking slots 301. The barbs at the ends of the clamping feet 401 The extendable bayonet 301 can be penetrated. The material of the clamp 400 and the clamp foot 401 is elastically deformable. Under the elastic deformation of the clamp foot 401, the barb of the clamp foot 401 can engage with the bayonet 301, thereby realizing the combination of the clamp 400 and the support frame 300. This allows the middle part of the clamp 400 to press the ends of the first pipeline and the second pipeline, thus fixing the first pipeline and the second pipeline. During disassembly, the clamp foot 401 can be deformed by bending it to disengage the barb from the opening. Installation and disassembly are more convenient. The ends of the first pipeline and the pressure sensor 90, as well as the ends of the second pipeline and the pressure sensor 90, can be connected by rubber tubes. The pressure sensor 90 is provided with a tubular interface, which is connected by rubber tubes. The structure is simple and the operation is convenient.

[0032] Preferably, in the first pipeline, the extension length of the corrugated metal section is not less than the extension length of the rigid metal section, and in the second pipeline, the extension length of the corrugated metal section is not less than the extension length of the rigid metal section, so that the more deformable corrugated metal section has sufficient length, ensuring sufficient deformability and improving the stress relief performance of the component.

[0033] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0034] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0035] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A GPF flexible metal bellow differential pressure pipe, characterized in that, The application relates to a pressure sensor connecting pipe for a GPF (Gasoline Particulate Filter) system. The application relates to a pressure sensor connecting pipe for a GPF (Gasoline Particulate Filter) system. The first pipe is in an elongated pipe structure, and is used for connecting the upstream of the GPF and the pressure sensor. The second pipe is in an elongated pipe structure, and is used for connecting the downstream of the GPF and the pressure sensor.

2. The GPF flexible metal bellow differential pressure pipe according to claim 1, characterized in that: The first pipe comprises a first section and a second section, one end of the first section is used for connecting the pressure sensor, the other end of the first section is connected with one end of the second section, the other end of the second section is used for connecting the upstream of the GPF, the first section is a metal bellows, and the second section is a hard metal pipe.

3. The GPF flexible metal bellow differential pressure pipe according to claim 2, characterized in that: The first section is provided with at least one turn.

4. The GPF flexible metal bellow differential pressure pipe of claim 2, wherein: The first section and the second section are connected through a rubber pipe sleeve joint.

5. The GPF flexible metal bellow differential pressure pipe of claim 1, wherein: The second pipe comprises a third section and a fourth section, one end of the third section is used for connecting the pressure sensor, the other end of the third section is connected with one end of the fourth section, the other end of the fourth section is used for connecting the downstream of the GPF, the third section is a metal bellows, and the fourth section is a hard metal pipe.

6. The GPF flexible metal bellow differential pressure pipe according to claim 5, characterized in that: The third section is provided with at least one turn.

7. The GPF flexible metal bellow differential pressure pipe of claim 5, wherein: The third section and the fourth section are connected through a rubber pipe sleeve joint.

8. The GPF flexible metal bellow differential pressure pipe of claim 1, wherein: The metal bellows part of the first pipe and the metal bellows part of the second pipe are correspondingly arranged side by side.

9. The GPF flexible metal bellow differential pressure pipe of claim 1, wherein: The application further relates to a support frame used for mounting the pressure sensor, one end of the first pipe and one end of the second pipe are arranged on the support frame.

10. The GPF flexible metal bellow differential pressure tube of claim 9, wherein: The first pipe and the pressure sensor and the second pipe and the pressure sensor are connected through rubber pipe sleeve joints.

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