CN115263625A - EGR system and vehicle - Google Patents
EGR system and vehicle Download PDFInfo
- Publication number
- CN115263625A CN115263625A CN202210956537.XA CN202210956537A CN115263625A CN 115263625 A CN115263625 A CN 115263625A CN 202210956537 A CN202210956537 A CN 202210956537A CN 115263625 A CN115263625 A CN 115263625A
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- Prior art keywords
- egr
- filtering
- egr valve
- filtering device
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000001914 filtration Methods 0.000 claims abstract description 77
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 abstract description 37
- 239000002245 particle Substances 0.000 abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 239000002912 waste gas Substances 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000013618 particulate matter Substances 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 8
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention provides an EGR system and a vehicle, wherein the EGR system comprises an EGR air inlet pipeline and an EGR valve, and further comprises a filtering device, the filtering device comprises a porous filtering structure, and the filtering device is arranged in the EGR air inlet pipeline and is positioned at the upstream of the EGR valve. The exhaust gas discharged in the application is filtered by the filtering device before entering the EGR valve, so that the risk of blockage and clamping stagnation of the EGR valve can be reduced; the risk of clogging of the EGR cooler is also reduced when an EGR cooler is provided. This filter equipment sets up before EGR valve, EGR cooler, is in higher temperature when waste gas gets into filter equipment, and carbon particulate matter after the filtration can high temperature reburning to from taking clean function, need not extra maintenance and maintaining. The particles filtered by the porous filtering structure are relatively and uniformly accumulated in the filtering device, so that high-temperature reburning is convenient to realize, and the self-cleaning function is ensured to be exerted.
Description
Technical Field
The invention relates to the technical field of vehicle exhaust gas treatment, in particular to an EGR (exhaust gas recirculation) system and a vehicle.
Background
In the existing EGR system technical route, an EGR system comprises an EGR air inlet pipe, an EGR valve and an EGR air outlet pipe. Exhaust manifold exhaust of engine gets into the EGR intake pipe when waste gas, part, when the EGR valve, can be at the inside scaling that forms of EGR valve, and the scaling layer can lead to EGR valve jamming trouble, when setting up the EGR cooling, also can cause the EGR cooler to block up.
Disclosure of Invention
The invention provides an EGR (exhaust gas recirculation) system which comprises an EGR air inlet pipeline and an EGR valve, and further comprises a filtering device, wherein the filtering device comprises a porous filtering structure, and the filtering device is arranged in the EGR air inlet pipeline and is positioned at the upstream of the EGR valve.
In one embodiment, the filtering device comprises a first pipe and a second pipe, wherein one end of the first pipe is an inlet for the gas flow entering the EGR pipeline, and the other end of the first pipe is closed; at least part of the pipe wall of the first pipeline is the porous filtering structure, the porous filtering structure is communicated with the second pipeline, one end of the second pipeline is closed, and the other end of the second pipeline is an outlet.
In one embodiment, the second conduit is disposed around the first conduit, and the inlet and the outlet are oppositely disposed.
In a specific embodiment, the first pipeline and the second pipeline constitute a filtering unit, and the filtering device comprises a plurality of filtering units arranged in parallel.
In one embodiment, a plurality of cooling tubes are disposed inside the EGR cooler, and the cooling tubes include any one of a fin, a threaded tube, and an embossed tube structure.
In one embodiment, an EGR cooler is provided downstream or upstream of the EGR valve, and the filtering means is provided upstream of the EGR cooler and the EGR valve.
In one embodiment, a bypass valve is provided that is capable of communicating the EGR valve with the EGR cooler and with an intake line of the engine.
The present application further provides a vehicle comprising an engine, and an EGR system as in any above connected to the engine.
In the application, the exhausted waste gas is firstly filtered by the filtering device before entering the EGR valve, so that impurities such as carbon particles in the waste gas can be removed, namely, the waste gas is pretreated before entering the EGR valve, the working environment of the EGR valve can be improved, and the risk of blockage and clamping stagnation of the EGR valve is reduced; the risk of clogging of the EGR cooler is also reduced when an EGR cooler is provided. More importantly, the filtering device is arranged in front of the EGR valve and the EGR cooler in the embodiment, when exhaust gas enters the filtering device, the exhaust gas is at a high temperature (up to over 500 ℃), and carbon particles after filtering can be re-combusted at a high temperature, so that the filtering device has a cleaning function and does not need extra maintenance. In addition, the filtering device is of a porous filtering structure, and aims to realize efficient filtering on one hand, and on the other hand, particles filtered by the porous filtering structure are relatively uniformly accumulated in the filtering device, so that high-temperature reburning is convenient to realize, and the self-cleaning function is guaranteed to be exerted.
Drawings
FIG. 1 is a schematic illustration of an EGR system in an embodiment of the subject application;
fig. 2 is a schematic view of the filter apparatus of fig. 1.
The reference numbers in fig. 1-2 are illustrated as follows:
10-an engine;
20-a filtration device; 201-a first conduit; 201 a-inlet; 2011-porous filter structures; 2012-closed end; 202-a second conduit; 2021-ring-shaped closed end; 202 a-an outlet;
30-an EGR valve; 40-an EGR cooler; 50-a bypass valve; 60-a turbocharger; 70-a filter;
a-an EGR inlet line; B-EGR exhaust line; c-an air inlet pipeline; d-an exhaust pipeline.
Detailed Description
In order that those skilled in the art will better understand the disclosure, reference will now be made in detail to the embodiments of the disclosure as illustrated in the accompanying drawings.
Referring to FIG. 1, FIG. 1 is a schematic diagram of an EGR system in an embodiment of the present application.
The EGR system in this embodiment includes an EGR intake line a, an EGR valve 30, and a filtering device 20, where the filtering device 20 specifically includes a porous filtering structure 2011 (shown in fig. 2) made of a porous filtering material, and the filtering device 20 is disposed in the EGR intake line a and located upstream of the EGR valve 30. In fig. 1, the EGR line is a branch line communicating with the exhaust line D of the engine 10, a part of the exhaust gas discharged from the engine 10 can enter the EGR intake line a, the amount of the entering exhaust gas is controlled by the opening degree of the EGR valve 30, and the exhaust gas is introduced into the engine 10 through the EGR exhaust line B after passing through the EGR valve 30 to participate in combustion again. Exhaust gases in the exhaust line D pass through a turbocharger 60 to pressurize incoming fresh air for provision to an intake line C of the engine 10, in which a filter 70 may be disposed.
Since the filter device 20 is disposed upstream of the EGR valve 30 and the exhaust gas is high-temperature exhaust gas, the temperature of the exhaust gas can reach 500 ℃. The porous filtering structure 2011 of the ceramic material has high filtering efficiency which can reach over 90 percent, the filtering diameter can reach 2.5 mu m, and the ceramic material structure has high temperature resistance.
With the arrangement, the discharged exhaust gas is filtered by the filtering device 20 before entering the EGR valve 30, so that impurities such as carbon particles in the exhaust gas can be removed, namely, the exhaust gas is pretreated before entering the EGR valve 30, the working environment of the EGR valve 30 can be improved, and the risk of blockage and clamping of the EGR valve 30 is reduced; the risk of EGR cooling blockage can also be reduced when an EGR cooler 40 is provided.
More importantly, in the embodiment, the filtering device 20 is arranged before the EGR valve 30 and the EGR cooler 40, when the exhaust gas enters the filtering device 20, the exhaust gas is at a high temperature (the temperature can reach over 600 ℃ under the high-speed vehicle and DPF regeneration conditions), the filtered carbon particles can be re-combusted at a high temperature, and the carbon particles react with oxygen to produce CO 2 To the exhaust, the carbon particles may also be mixed with NO 2 Reaction to produce CO 2 And N 2 And is discharged, thereby having a self-cleaning function and requiring no additional maintenance. In addition, the filtering device 20 is a porous filtering wall-flow structure, and the purpose of the filtering device is to implement efficient filtering on the one hand, and on the other hand, the particulate matters filtered by the porous filtering structure 2011 are relatively and uniformly accumulated in the filtering device 20, so that high-temperature reburning is facilitated, and the exertion of a self-cleaning function is ensured.
The specific structure of the filter apparatus 20 can be understood with continued reference to fig. 2, fig. 2 being a schematic view of the filter apparatus 20 of fig. 1.
As shown in fig. 2, the filtering device 20 in the present embodiment includes a first pipe 201 and a second pipe 202, and one end of the first pipe 201 is an inlet 201a for the exhaust gas flow entering the EGR inlet line a, that is, the inlet 201a may be oriented in the same direction as the path of the EGR inlet line a, so that the exhaust gas can smoothly enter the filtering device 20. The other end of the first pipe 201 of the filter device 20 is closed, which is a closed end 2012, i.e. the exhaust gas cannot flow out of the closed end 2012. At this time, at least a part of the tube wall of the first tube 201 is the above-mentioned porous filtering structure 2011, so that the exhaust gas can only flow out from the porous filtering structure 2011 of the tube wall of the first tube 201 after entering the first tube 201, and the via filtering structure 2011 is communicated with the second tube 202, so that the exhaust gas can flow into the second tube 202 after being filtered by the porous filtering structure 2011, one end of the second tube 202 is closed, the other end is an outlet 202a, the filtered exhaust gas can flow out from the outlet 202a of the second tube 202, and the direction of the outlet 202a can be consistent with the path of the EGR intake tube a, so that the exhaust gas can smoothly flow out. With such an arrangement, the porous filtering structure 2011 is not limited by the radial dimension of the first pipeline 201, and the porous filtering structure 202 with a large area can be arranged on the pipe wall, so that relatively efficient filtering is realized.
Further, as shown in fig. 2, black arrows indicate the flow direction of the exhaust gas. The second pipe 202 of the filter device 20 in this embodiment may be disposed around the first pipe 201, that is, the first pipe 201 is nested in the second pipe 202, one end of the annular cavity between the first pipe 201 and the second pipe 202 is closed, as shown by an annular closed end portion 2021 in fig. 2, that is, one end of the first pipe 201 is closed, in fig. 2, the left end of the annular cavity is closed, the left end of the first pipe 202 is open as an inlet 201a, and the other end of the annular cavity is open, that is, the right end is open as the outlet 202a. Therefore, the nested arrangement mode of the first pipeline 201 and the second pipeline 202 enables the pipe wall of the first pipeline 201 to be easily communicated with the second pipeline 202 after being arranged into the porous filtering structure 2011, and the pipe wall of the first pipeline 201 can be completely or mostly arranged into the porous filtering structure 2011, so that the filtered waste gas can be discharged to the second pipeline 202 more uniformly in a larger area along the circumferential direction.
In this embodiment, a first pipeline 201 and a second pipeline 202 in fig. 2 form a filtering unit, the filtering device 20 may include a plurality of filtering units arranged in parallel, and the plurality of filtering units may ensure that the airflow may uniformly enter each filtering unit for filtering, thereby improving the filtering effect. In addition, a plurality of filtering units may be all disposed in the EGR intake pipeline a, that is, specifically disposed in the inner cavity of the EGR intake pipeline a, and the plurality of filtering units may be filled in the inner cavity of the EGR intake pipeline a as much as possible, at this time, the air flow in the EGR intake pipeline a may directly enter the filtering device 20 through the inlet 201a, and the air flow flowing out from the outlet 202a is also directly discharged into the pipeline of the EGR intake pipeline a. It is understood that the filter device 20 may be connected in series with the EGR inlet line a, and in this case, the inlet and outlet of the filter device 20 need to be connected in butt joint with the EGR inlet line a.
The filter device 20 is not limited to the first pipeline 201 and the second pipeline 202 which are nested, as long as at least two pipelines are provided, a pipe wall between the two pipelines is a porous filter structure 2011, and one air supply flow enters and the other air supply flow exits.
Further, the EGR valve 30 in the present embodiment may be provided with any one of a fin, a threaded pipe, and a knurled pipe structure, that is, this EGR valve 30 may be of a dense fin design or provided with a threaded pipe or a knurled pipe structure. As described above, because the filter device 20 is disposed, the exhaust gas is pretreated, and the working environment of the EGR valve 30 is improved, and the arrangement of the fins, the threaded pipes, or the embossed pipe structure facilitates the heat dissipation of the EGR valve 30, and the exhaust gas does not accumulate on the fins due to the high concentration of the particulate matter in the exhaust gas.
As shown in fig. 2, in the present embodiment, an EGR cooler 40 is provided downstream of the EGR valve 30, so that the exhaust gas can be cooled, and the cooled exhaust gas can be re-introduced into the engine 10 to be combusted again. At this time, the EGR valve 30 is a warm-end cooling valve. It is noted that the EGR valve 30 of the present embodiment may be configured as a cold-end EGR valve, that is, downstream of the EGR cooler 40, as described above, because the filtering device 20 pre-treats the exhaust gas, the working environment of both the EGR valve 30 and the EGR cooler 40 is improved, and the exhaust gas passes through the EGR cooler 40 before passing through the EGR valve 30, so that the design requirement of the cold-end EGR valve 30 is lower, and the cost can be better controlled.
As shown in fig. 1, the EGR valve 30 in the present embodiment is further provided with a bypass valve 50, and the bypass valve 50 is specifically a three-way valve, and the bypass valve 50 is capable of communicating the EGR valve 30 and the EGR cooler 40, and communicating the EGR valve 30 and the EGR valve 30 with the EGR exhaust line B. When the exhaust gas does not need to be cooled, the exhaust gas may directly flow to the EGR exhaust pipe B through the bypass valve 50, and is not cooled by the EGR cooling, so that energy consumption may be saved, and when partial cooling or full cooling is needed, the bypass valve 50 may also control the exhaust gas to completely flow to the EGR cooler 40, or partially flow into the EGR cooler 40, and partially directly flow to the EGR exhaust pipe B, and then enter the engine 10 to participate in combustion again.
The embodiment also provides a vehicle comprising an engine 10 and the EGR system connected with the engine 10 and provided with the same technical effects as the EGR system, and the discussion is not repeated.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. An EGR system comprising an EGR intake line, an EGR valve, said EGR system further comprising a filtering device comprising a porous filtering structure, and said filtering device is disposed in said EGR intake line upstream of said EGR valve.
2. The EGR system of claim 1 wherein the filtering means comprises a first conduit and a second conduit, the first conduit having an inlet at one end for the flow of gas into the EGR path and the other end of the first conduit being closed; at least part of the pipe wall of the first pipeline is the porous filtering structure, the porous filtering structure is communicated with the second pipeline, one end of the second pipeline is closed, and the other end of the second pipeline is an outlet.
3. The EGR system of claim 2 wherein the second conduit is disposed around the first conduit, the inlet and the outlet being oppositely disposed.
4. The EGR system of claim 3 wherein said first conduit and said second conduit comprise a filter unit and said filtering means comprises a plurality of said filter units arranged in parallel.
5. The EGR system of claim 1 wherein the EGR valve comprises any of a fin, a threaded tube, an embossed tube structure.
6. The EGR system of any of claims 1-5 wherein an EGR cooler is provided downstream or upstream of the EGR valve, and the filtering means is provided upstream of the EGR cooler.
7. The EGR system of claim 5, further provided with a bypass valve capable of communicating the EGR valve with the EGR cooler and with an intake line of an engine.
8. A vehicle comprising an engine, and an EGR system according to any of claims 1-7 connected to the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210956537.XA CN115263625A (en) | 2022-08-10 | 2022-08-10 | EGR system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210956537.XA CN115263625A (en) | 2022-08-10 | 2022-08-10 | EGR system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115263625A true CN115263625A (en) | 2022-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210956537.XA Pending CN115263625A (en) | 2022-08-10 | 2022-08-10 | EGR system and vehicle |
Country Status (1)
| Country | Link |
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| CN (1) | CN115263625A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013036445A (en) * | 2011-08-10 | 2013-02-21 | Toyota Motor Corp | Egr system of internal combustion engine |
| JP2013256912A (en) * | 2012-06-13 | 2013-12-26 | Fuji Heavy Ind Ltd | Filter device of exhaust reflux device |
| CN106014707A (en) * | 2016-08-04 | 2016-10-12 | 广西玉柴机器股份有限公司 | EGR (Exhaust Gas Recirculation) system |
| CN208252237U (en) * | 2018-04-26 | 2018-12-18 | 四川田奥环保科技有限公司 | A kind of scheme for exhaust gas circulation system based on EGR |
| US20190383244A1 (en) * | 2018-06-15 | 2019-12-19 | Hyundai Motor Company | Egr filter for preventing clogging |
| CN210343538U (en) * | 2019-05-05 | 2020-04-17 | 天津大学 | Medium-pressure exhaust gas recirculation system based on two-stage turbocharger |
| CN213743735U (en) * | 2020-10-10 | 2021-07-20 | 南通职业大学 | Diesel engine EGR system particle filtering device with anti-blocking monitoring function |
| CN215927600U (en) * | 2021-05-13 | 2022-03-01 | 潍柴动力股份有限公司 | Engine EGR bypass device |
-
2022
- 2022-08-10 CN CN202210956537.XA patent/CN115263625A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013036445A (en) * | 2011-08-10 | 2013-02-21 | Toyota Motor Corp | Egr system of internal combustion engine |
| JP2013256912A (en) * | 2012-06-13 | 2013-12-26 | Fuji Heavy Ind Ltd | Filter device of exhaust reflux device |
| CN106014707A (en) * | 2016-08-04 | 2016-10-12 | 广西玉柴机器股份有限公司 | EGR (Exhaust Gas Recirculation) system |
| CN208252237U (en) * | 2018-04-26 | 2018-12-18 | 四川田奥环保科技有限公司 | A kind of scheme for exhaust gas circulation system based on EGR |
| US20190383244A1 (en) * | 2018-06-15 | 2019-12-19 | Hyundai Motor Company | Egr filter for preventing clogging |
| CN210343538U (en) * | 2019-05-05 | 2020-04-17 | 天津大学 | Medium-pressure exhaust gas recirculation system based on two-stage turbocharger |
| CN213743735U (en) * | 2020-10-10 | 2021-07-20 | 南通职业大学 | Diesel engine EGR system particle filtering device with anti-blocking monitoring function |
| CN215927600U (en) * | 2021-05-13 | 2022-03-01 | 潍柴动力股份有限公司 | Engine EGR bypass device |
Non-Patent Citations (1)
| Title |
|---|
| 康拉德·莱夫: "《BOSCH 汽车工程手册 中文第4版 德文第27版》", 31 January 2016, 北京理工大学出版社, pages: 478 * |
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Application publication date: 20221101 |