Post-processing device with differential pressure pipeline self-heating function, exhaust system and vehicle
By introducing an insulation chamber into the differential pressure line and utilizing engine exhaust heat exchange, the problem of icing in the differential pressure line was solved, ensuring the normal operation of the differential pressure line and the accuracy of the sensors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING JINKANG NEW ENERGY VEHICLE CO LTD
- Filing Date
- 2025-10-14
- Publication Date
- 2026-07-21
Smart Images
Figure CN224532804U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle exhaust system technology, specifically to an aftertreatment device with differential pressure pipeline self-heating function, an exhaust system, and a vehicle. Background Technology
[0002] A particulate filter is a filter installed in a vehicle's exhaust system. It captures particulate matter in the exhaust gas, effectively reducing particulate emissions. However, when too much particulate matter accumulates in the particulate filter, it can cause blockage, leading to filter failure. Therefore, it is necessary to check the blockage status of the particulate filter to determine if it has failed.
[0003] To address this, related technologies employ differential pressure pipelines installed on both sides of the particulate filter to monitor the pressure difference between the inlet and outlet of the exhaust gas, thus determining whether the particulate filter has malfunctioned. However, due to the presence of condensation in the air, the differential pressure pipelines can freeze and become blocked in low-temperature environments. This prevents the differential pressure sensor from promptly acquiring the true exhaust gas pressure value across the front and rear ends of the particulate filter, resulting in the sensor transmitting incorrect exhaust gas pressure signals, leading to misjudgments and the activation of fault indicators. Utility Model Content
[0004] In view of the above problems, this utility model provides an aftertreatment device, exhaust system and vehicle with a differential pressure pipeline self-heating function, which can prevent ice formation inside the differential pressure pipeline of the particulate filter and ensure the normal operation of the differential pressure pipeline.
[0005] According to one aspect of the present invention, an aftertreatment device with a differential pressure pipeline self-heating function is provided, comprising: a particulate filter connected to an engine exhaust pipe and equipped with a differential pressure pipeline for detecting the pressure difference along the airflow direction within the particulate filter; a heat preservation box having a heat preservation cavity inside, wherein at least a portion of the differential pressure pipeline passes through the heat preservation cavity; a front section of an air intake pipe, one end of which is connected to the engine exhaust pipe and the other end of which is connected to the heat preservation cavity; and a rear section of an air intake pipe, one end of which is connected to the heat preservation cavity and the other end of which is connected to the external space of the heat preservation box.
[0006] In an exemplary embodiment of this utility model, a valve is provided at the other end of the rear section of the air intake pipe, or the other end of the rear section of the air intake pipe is connected to the air inlet of the EGR cooler.
[0007] In an exemplary embodiment of this utility model, the differential pressure pipeline includes at least two differential pressure pipes, both of which are connected to a particulate filter. The connection points between the two differential pressure pipes and the particulate filter are spaced apart along the airflow direction inside the particulate filter.
[0008] In an exemplary embodiment of this utility model, the airflow direction inside the particle trap is taken as the first direction, and the heat preservation box is arranged close to the particle trap and extends along the first direction.
[0009] In an exemplary embodiment of the present invention, the heat preservation box has a first end and a second end distributed at both ends along a first direction, the front section of the air intake tube is connected to the first end, and the rear section of the air intake tube is connected to the second end.
[0010] In an exemplary embodiment of the present invention, at least a portion of the differential pressure pipeline passing through the insulation cavity extends along a first direction and exits from a first end.
[0011] In an exemplary embodiment of the present invention, the particulate filter includes a housing and a TWC component and a GPF component sequentially encapsulated inside the housing along the exhaust gas discharge direction; the first end corresponds to the air inlet end of the housing, and the front section of the air intake pipe is connected between the air inlet end and the first end perpendicular to the first direction.
[0012] In an exemplary embodiment of this utility model, the differential pressure pipeline includes a first differential pressure pipe, a second differential pressure pipe, and a differential pressure sensor, with the differential pressure sensor arranged near the first end; one end of the first differential pressure pipe is connected between the TWC component and the GPF component, and the other end is perpendicular to the first direction and passes through the insulation box, and bends and extends along the first direction in the insulation cavity to the end connected to the differential pressure sensor; one end of the second differential pressure pipe is connected between the exhaust end of the GPF component and the housing, and the other end is perpendicular to the first direction and passes through the insulation box, and bends and extends along the first direction in the insulation cavity to the other end connected to the differential pressure sensor.
[0013] According to a second aspect of the present invention, an exhaust system is provided, including the above-described post-treatment device with differential pressure pipeline self-heating function.
[0014] According to a third aspect of the present invention, a vehicle is provided, including the exhaust system described above.
[0015] This invention involves inserting at least a portion of the differential pressure pipeline into the insulation cavity inside the insulation box, and then connecting the engine exhaust pipeline and the insulation cavity through the front end of the air intake pipe. This allows the high-temperature exhaust gas from the engine exhaust pipeline to enter the insulation cavity, enabling sufficient heat exchange between the high-temperature exhaust gas in the insulation cavity and the differential pressure pipeline arranged in the insulation cavity. This allows the differential pressure pipeline to heat up rapidly, thereby preventing ice formation inside the differential pressure pipeline and ensuring its normal operation.
[0016] The above description is merely an overview of the technical solutions of the present utility model embodiments. In order to better understand the technical means of the present utility model embodiments and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present utility model embodiments more obvious and understandable, specific embodiments of the present utility model are described below. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0018] Figure 1 A schematic diagram of the post-processing device with differential pressure pipeline self-heating function in this embodiment is shown; Figure 2 A cross-sectional view of the post-processing device with differential pressure pipeline self-heating function in this embodiment is shown.
[0019] Explanation of icon numbers: 1-Particulate filter, 11-Housing, 111-Inlet, 112-Outlet, 12-TWC assembly, 13-GPF assembly 2-Differential pressure line, 21-First differential pressure line, 22-Second differential pressure line. 3-Insulated box, 31-Insulated cavity, 32-First end, 33-Second end 4 - Anterior segment of the trachea, 5 - Posterior segment of the trachea, x - First direction.
[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0021] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.
[0022] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the present invention. However, those skilled in the art will recognize that the technical solutions of the present invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., may be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the present invention.
[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0024] Furthermore, the orientations or positional relationships indicated by terms such as "front," "rear," "left," "right," "up," and "down" in the embodiments of this utility model are based on the orientations or positional relationships shown in the accompanying drawings; the terms "inner" and "outer" in the embodiments of this application are defined based on the outline of the corresponding component. It is understood that the above-mentioned terms indicating orientations or positional relationships are only for the convenience of describing this utility model and simplifying the description, and do not 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 this utility model.
[0025] like Figure 1 and Figure 2 As shown, this embodiment provides an aftertreatment device with a self-heating function for differential pressure pipeline, including: a particulate filter 1, a heat preservation box 3, a front section 4 of the air intake pipe, and a rear section 5 of the air intake pipe; the particulate filter 1 is connected to the engine exhaust pipe and is equipped with a differential pressure pipeline 2 for detecting the pressure difference along the airflow direction inside the particulate filter 1; the heat preservation box 3 has a heat preservation cavity 31 inside, and at least a portion of the differential pressure pipeline 2 passes through the heat preservation cavity 31; one end of the front section 4 of the air intake pipe is connected to the engine exhaust pipe, and the other end is connected to the heat preservation cavity 31; one end of the rear section 5 of the air intake pipe is connected to the heat preservation cavity 31, and the other end is connected to the external space of the heat preservation box 3. In this way, the front section 4 of the intake pipe, the insulation chamber 31, and the rear section 5 of the intake pipe form an airflow passage. When the engine starts, the high-temperature exhaust gas in the exhaust pipe can enter the insulation chamber 31 through the front section 4 of the intake pipe, and fill the insulation chamber 31 with high-temperature exhaust gas. In this way, the high-temperature exhaust gas in the insulation chamber 31 can fully exchange heat with at least a part of the differential pressure pipeline 2 that passes through the insulation chamber 31, so that the differential pressure pipeline 2 can be heated up quickly, thereby achieving the purpose of avoiding ice formation inside the differential pressure pipeline 2 and ensuring the normal operation of the differential pressure pipeline 2.
[0026] It is understood that the differential pressure line 2 in the above embodiment includes at least two differential pressure lines (e.g., the first differential pressure line 21 and the second differential pressure line 22). Both differential pressure lines are connected to the particulate filter 1, and the connection points between the two differential pressure lines and the particulate filter 1 are spaced apart along the airflow direction inside the particulate filter 1 (e.g., respectively located on the inlet side and outlet side of the particulate filter 1). In this way, the pressure difference of the exhaust gas along the airflow direction inside the particulate filter 1 can be monitored through the differential pressure line 2, thereby determining whether the particulate filter 1 has failed.
[0027] In some embodiments, a valve (not shown in the figure) can be provided at the other end of the gas intake pipe 5. The valve can control the opening and closing of the gas intake pipe 5. In this way, when rapid heating is required, the valve can be opened to keep the high-temperature exhaust gas flowing, ensuring that the differential pressure pipeline 2 located in the insulation cavity 31 can be fully heat exchanged. When the engine is turned off, the valve can be closed to seal the insulation cavity 31. At this time, the heat inside the insulation box 3 dissipates slowly, and the differential pressure pipeline 2 can be continuously insulated in the insulation cavity 31.
[0028] Understandably, the valve can be an electronically controlled valve connected to the vehicle's infotainment system, capable of automatically opening and closing based on preset conditions, such as automatically opening when the vehicle starts and automatically closing when the vehicle is turned off. Furthermore, by adjusting the valve's opening degree, the flow rate of high-temperature exhaust gas in the insulation chamber 31 can be controlled, preventing excessive exhaust gas from being discharged from the rear section 5 of the intake pipe.
[0029] In some embodiments, the other end of the intake pipe 5 can also be connected to the intake end of the EGR (Exhaust Gas Return) cooler (not shown in the figure), so that the high-temperature exhaust gas flowing through the insulation chamber 31 can enter the exhaust gas recirculation system for secondary combustion via the EGR cooler; at the same time, when the high-temperature exhaust gas passes through the insulation chamber 31, it will exchange heat with the cold differential pressure pipeline 2, thereby reducing the exhaust gas temperature, reducing the cooling burden on the EGR cooler, and improving the cooling efficiency of the exhaust gas.
[0030] Because the collection end of the differential pressure pipeline 2 needs to be arranged on both sides of the inlet / outlet of the particulate filter 1, and the distance between the inlet and outlet of the particulate filter 1 is relatively large, therefore, in some embodiments, such as Figure 1 and Figure 2 As shown, with the airflow direction inside the particulate trap 1 as the first direction x, the insulation box 3 is arranged close to the particulate trap 1 and extends along the first direction x. In this way, the insulation box 3 can cover the front and rear ends of the particulate trap 1, so that most of the pipe section of the differential pressure pipeline 2 can be installed in the insulation box 3, thereby reducing the exposed area of the differential pressure pipeline 2 in the external environment and improving the heat exchange efficiency between the high temperature exhaust gas and the differential pressure pipeline 2.
[0031] In some embodiments, such as Figure 1 and Figure 2 As shown, the heat preservation box 3 has a first end 32 and a second end 33 distributed at both ends along the first direction x. The front section 4 of the gas intake pipe is connected to the first end 32, and the rear section 5 of the gas intake pipe is connected to the second end 33. In this way, the high temperature exhaust gas can fully contact at least a portion of the differential pressure pipeline 2 that passes through the heat preservation cavity 31, thereby achieving effective heat exchange.
[0032] In some embodiments, such as Figure 1 and Figure 2 As shown, at least a portion of the differential pressure pipeline 2, which passes through the insulation cavity 31, extends along the first direction x and exits from the first end 32. This increases the proportion of the differential pressure pipeline 2 in the insulation cavity 31 and reduces the exposed area of the differential pressure pipeline 2 in the external environment, thereby improving the heat exchange efficiency between the high-temperature exhaust gas and the differential pressure pipeline 2.
[0033] It is understood that the above embodiments mainly describe the general connection relationship between the insulation box 3, the particulate trap 1, and the differential pressure pipeline 2 in the post-processing device with differential pressure pipeline self-heating function. The specific structure and arrangement of the particulate trap 1 and the differential pressure pipeline 2 are further related to the heat exchange efficiency of the differential pressure pipeline 2. Therefore, the structure of the particulate trap 1 will be specifically described next to meet further requirements and functions.
[0034] Specifically, such as Figure 1 and Figure 2 As shown, the particulate filter 1 in this embodiment includes a housing 11 and a TWC component 12 (three-way catalyst) and a GPF component 13 (Gasoline Particulate Filter) sequentially encapsulated inside the housing 11 along the exhaust gas discharge direction. (Filter, particulate trap); the housing 11 has an air inlet 111 and an exhaust end. The air inlet 111 is used to connect to the exhaust pipe. The high-temperature exhaust gas in the exhaust pipe enters the housing 11 through the air inlet 111 and is processed by the TWC component 12 and the GPF component 13 in sequence before reaching the exhaust end. The exhaust end is used to connect to the muffler to discharge the treated exhaust gas. In this regard, the first end 32 of the heat preservation box 3 corresponds to the air inlet 111 of the housing 11. The front section 4 of the air intake pipe is connected perpendicularly to the first direction x between the air inlet 111 of the housing 11 and the first end 32 of the heat preservation box 3. In this way, the size of the front section 4 of the air intake pipe can be shortened, reducing the heat loss when the high-temperature exhaust gas passes through the front section 4 of the air intake pipe. At the same time, the front section 4 of the air intake pipe can be welded to connect the heat preservation box 3 and the housing 11 of the particulate trap 1, so that the two are tightly connected and the structure is compact.
[0035] Furthermore, such as Figure 1 and Figure 2 As shown, the differential pressure line 2 in this embodiment includes a first differential pressure line 21, a second differential pressure line 22, and a differential pressure sensor (not shown in the figure). The differential pressure sensor is arranged near the first end 32 of the insulation box 3. One end of the first differential pressure line 21 is connected between the TWC component 12 and the GPF component 13, and the other end is perpendicular to the first direction x and passes through the insulation box 3. It bends and extends along the first direction x towards the first end 32 of the insulation box 3 in the insulation cavity 31 until it extends out of the first end 32 of the insulation box 3 and is connected to one end of the differential pressure sensor. One end of the second differential pressure line 22 is connected between the exhaust end of the GPF component 13 and the housing 11. The other end is perpendicular to the first direction x and passes through the insulation box 3. It bends and extends along the first direction x towards the first end 32 of the insulation box 3 in the insulation cavity 31 until it extends out of the first end 32 of the insulation box 3 and is connected to the other end of the differential pressure sensor. Because the GPF component 13 inside the encapsulation assembly can capture carbon particles in the high-temperature exhaust gas, the carbon particles will be adsorbed in the fine pores of the GPF component 13, causing the exhaust gas pressure at the front end of the GPF component 13 to be different from that at the rear end (the pressure at the front end is higher, and the pressure at the rear end is lower). The first differential pressure tube 21 and the second differential pressure tube 22 can transmit the exhaust gas pressure at the front and rear ends of the GPF component 13 to the differential pressure sensor, and the differential pressure sensor calculates the exhaust gas pressure difference between the front and rear ends of the GPF component 13 and feeds it back to the ECU (Electronic Control Unit) to determine whether the GPF component 13 is working properly.
[0036] Through the above arrangement, on the one hand, the dimensions of the first differential pressure pipe 21 and the second differential pressure pipe 22 between the particulate collector 1 and the insulation box 3 can be shortened, reducing the exposed area of the first differential pressure pipe 21 and the second differential pressure pipe 22 in the external environment; on the other hand, the first differential pressure pipe 21 and the second differential pressure pipe 22 inserted in the insulation cavity 31 can be in full contact with the high-temperature exhaust gas in the insulation cavity 31, achieving effective heat exchange. In addition, the first differential pressure pipe 21 and the second differential pressure pipe 22 can be connected to the insulation box 3 and the shell 11 of the particulate collector 1 by welding to improve the connection stability and ensure effective sealing at the insertion point.
[0037] Furthermore, in another embodiment, an exhaust system is also provided, including the aftertreatment device with differential pressure pipeline self-heating function as described in the above embodiments. It is understood that for other structures and working principles of the aftertreatment device with differential pressure pipeline self-heating function, please refer to the above description of the embodiments of the aftertreatment device with differential pressure pipeline self-heating function; for other structures of the exhaust system, please refer to the prior art; since the aftertreatment device with differential pressure pipeline self-heating function has the above-mentioned technical effects, the exhaust system having this aftertreatment device should also have corresponding technical effects, which will not be elaborated here.
[0038] In another embodiment, a vehicle is also provided, including an exhaust system with an aftertreatment device having a differential pressure line self-heating function as described in the above embodiments. It is understood that for other structures and working principles of the aftertreatment device with differential pressure line self-heating function, please refer to the above description of the embodiments of the aftertreatment device with differential pressure line self-heating function; for other structures of the exhaust system and the vehicle, please refer to the prior art; since the exhaust system with the aftertreatment device having the above-mentioned technical effects has the aforementioned technical effects, the vehicle with this exhaust system should also have the corresponding technical effects, which will not be elaborated here.
[0039] It is understood that, in this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified. The terms "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model.
[0041] The illustrative expressions of the terms used above do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those different embodiments or examples, without contradiction.
[0042] Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, substitutions and variations to the above embodiments within the scope of the present invention. Therefore, any changes or modifications made in accordance with the claims and description of the present invention should fall within the scope of the patent coverage of the present invention.
Claims
1. A post-processing device with a differential pressure pipeline self-heating function, characterized in that, include: A particulate filter, which is connected to the engine exhaust pipe and is equipped with a differential pressure line for detecting the pressure difference along the airflow direction inside the particulate filter; The insulated box has an internal insulated cavity, and at least a portion of the differential pressure pipeline passes through the insulated cavity; The air intake pipe has one end connected to the engine exhaust pipe and the other end connected to the insulation cavity; and The rear section of the air intake tube has one end connected to the insulation cavity and the other end connected to the external space of the insulation box.
2. The post-processing device with self-heating function of differential pressure pipeline according to claim 1, characterized in that, The other end of the gas intake pipe is equipped with a valve, or the other end of the gas intake pipe is connected to the air inlet of the EGR cooler.
3. The post-processing device with self-heating function of differential pressure pipeline according to claim 1, characterized in that, The differential pressure pipeline includes at least two differential pressure pipes, both of which are connected to the particulate trap. The connection points between the two differential pressure pipes and the particulate trap are spaced apart along the airflow direction inside the particulate trap.
4. The post-processing device with self-heating function of differential pressure pipeline according to any one of claims 1-3, characterized in that, With the airflow direction inside the particle trap as the first direction, the heat preservation box is arranged close to the particle trap and extends along the first direction.
5. The post-processing device with self-heating function of differential pressure pipeline according to claim 4, characterized in that, The insulated box has a first end and a second end distributed at both ends along the first direction, the front section of the air intake tube is connected to the first end, and the rear section of the air intake tube is connected to the second end.
6. The post-processing device with self-heating function of differential pressure pipeline according to claim 5, characterized in that, At least a portion of the differential pressure pipeline, which passes through the insulation cavity, extends along the first direction and exits from the first end.
7. The post-processing device with self-heating function of differential pressure pipeline according to claim 5, characterized in that, The particulate filter includes a housing and a TWC component and a GPF component sequentially encapsulated inside the housing along the exhaust gas discharge direction; the first end corresponds to the air inlet end of the housing, and the front section of the air intake pipe is perpendicular to the first direction and connected between the air inlet end and the first end.
8. The post-processing device with self-heating function of differential pressure pipeline according to claim 7, characterized in that, The differential pressure pipeline includes a first differential pressure pipe, a second differential pressure pipe, and a differential pressure sensor, with the differential pressure sensor positioned close to the first end. One end of the first differential pressure tube is connected between the TWC component and the GPF component, and the other end is perpendicular to the first direction and passes through the insulation box, and is bent and extended in the insulation cavity along the first direction to one end connected to the differential pressure sensor. One end of the second differential pressure tube is connected between the exhaust end of the GPF assembly and the housing, and the other end is perpendicular to the first direction and passes through the insulation box, and bends and extends in the insulation cavity along the first direction to the other end connected to the differential pressure sensor.
9. An exhaust system, characterized in that, Includes the post-processing device with differential pressure pipeline self-heating function as described in any one of claims 1-8.
10. A vehicle, characterized in that, Includes the exhaust system as described in claim 9.