CN220015311U - European seven post-processing system of diesel engine - Google Patents
European seven post-processing system of diesel engine Download PDFInfo
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- CN220015311U CN220015311U CN202321361143.6U CN202321361143U CN220015311U CN 220015311 U CN220015311 U CN 220015311U CN 202321361143 U CN202321361143 U CN 202321361143U CN 220015311 U CN220015311 U CN 220015311U
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- 238000012805 post-processing Methods 0.000 title description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 20
- 239000004202 carbamide Substances 0.000 claims description 20
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a European seven post-treatment system of a diesel engine, which comprises: the system comprises a first exhaust pipeline, a three-way pipeline, a second exhaust pipeline, a first SCR assembly, a first ASC assembly, a DOC assembly, a DPF assembly, a second SCR assembly, a second ACS assembly and a third exhaust pipeline. The first SCR assembly is arranged on the second exhaust pipeline. The first ASC assembly is arranged on the second exhaust pipeline, and one end of the first ASC assembly is fixedly connected with one end of the first SCR assembly, which is far away from the first exhaust pipeline. The DOC assembly is arranged on the second exhaust pipeline. The DPF assembly is arranged on the second exhaust pipe, and one end of the DPF assembly is fixedly connected with one end of the DOC, which is far away from the first ASC assembly. Therefore, the European seven post-treatment system of the diesel engine has simple and reasonable structure, can balance the emission and the oil consumption of the engine, and effectively improves the oil consumption of the engine.
Description
Technical Field
The utility model relates to the technical field of engine aftertreatment, in particular to a European seven aftertreatment system of a diesel engine.
Background
With the continuous tightening of emission regulations, european has now introduced the european seventh emission regulations, further reducing pollutant nitrogen oxides NOx, particle count PN, carbon monoxide CO, etc. Wherein the nitrogen oxide NOx emission limit is reduced by 71.5% and the particle count PN emission limit is reduced by 83.3%.
Currently, all suppliers and engine companies begin to research aftertreatment systems meeting the European seven emission limit, and a tightly coupled selective reduction catalyst SCR system is added to the national six aftertreatment systems to treat nitrogen oxides NOx and a high-efficiency particle trap DPF during cold start; another is to use a dual spray strategy to reduce the pollutant nitrogen oxides NOx and the high efficiency particulate trap DPF to reduce the pollutant particle count PN. However, the exhaust back pressure is increased, through experimental verification, the back pressure is increased by more than 40%, pumping work of the engine is increased due to the increase of the back pressure, the fuel consumption of the engine is deteriorated by 2%, meanwhile, according to experimental data, the tightly coupled SCR mainly acts when the post-vortex exhaust temperature is lower than 220 ℃, and after the post-vortex exhaust temperature is increased to 250 ℃, the post-stage SCR works to meet the emission limit value. Therefore, the existing two modes can not balance the emission and the oil consumption of the engine.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The utility model aims to provide a European seven post-treatment system of a diesel engine, which has a simple and reasonable structure, can balance the emission and the oil consumption of the engine, and effectively improves the oil consumption of the engine.
To achieve the above object, the present utility model provides an ohseven aftertreatment system for a diesel engine, comprising: the system comprises a first exhaust pipeline, a three-way pipeline, a second exhaust pipeline, a first SCR assembly, a first ASC assembly, a DOC assembly, a DPF assembly, a second SCR assembly, a second ACS assembly and a third exhaust pipeline. One end of the first exhaust pipeline is fixedly connected with the engine; the first end of the three-way pipeline is connected with the other end of the first exhaust pipeline; one end of the second exhaust pipeline is connected with the second end of the three-way pipeline. The first SCR assembly is arranged on the second exhaust pipeline. The first ASC assembly is arranged on the second exhaust pipeline, and one end of the first ASC assembly is fixedly connected with one end of the first SCR assembly, which is far away from the first exhaust pipeline. The DOC assembly is arranged on the second exhaust pipeline. The DPF assembly is arranged on the second exhaust pipe, and one end of the DPF assembly is fixedly connected with one end of the DOC, which is far away from the first ASC assembly. The second SCR assembly is arranged on the second exhaust pipeline, and one end of the second SCR assembly is fixedly connected with the other end of the DPF assembly. The second ACS assembly is arranged on the second exhaust pipeline, and one end of the second ACS assembly is fixedly connected with the other end of the second SCR assembly. And one end of the third exhaust pipeline is connected with the third end of the three-way pipeline, and the other end of the third exhaust pipeline is connected with the second exhaust pipeline and is positioned at the front end of the DOC assembly.
In one embodiment of the utility model, the European seventh aftertreatment system of the diesel engine further comprises a first bypass electronic valve and a second bypass electronic valve. The first bypass electronic valve is arranged at the joint of the three-way pipeline and the second exhaust pipeline. And the second bypass electronic valve is arranged at the joint of the three-way pipeline and the third exhaust pipeline.
In an embodiment of the present utility model, the first bypass electronic valve and the second bypass electronic valve are respectively electrically connected to the ECU, and the ECU is capable of controlling opening and closing of the first bypass electronic valve and the second bypass electronic valve.
In one embodiment of the utility model, the European seven-aftertreatment system of the diesel engine further comprises a first temperature sensor and a second temperature sensor. The first temperature sensor is arranged on the front end of the first SCR assembly and is electrically connected with the ECU. And the second temperature sensor is arranged on the front end of the second SCR assembly and is electrically connected with the ECU.
In one embodiment of the utility model, when the first temperature sensor detects that the temperature of the exhaust gas at the front end of the first SCR assembly is higher than 250 ℃, the ECU controls the first bypass electronic valve to be closed and the second bypass electronic valve to be opened.
In one embodiment of the utility model, when the second temperature sensor detects that the temperature of the exhaust gas at the front end of the second SCR assembly is lower than 220 ℃, the ECU controls the second bypass electronic valve to be closed and opens the first bypass electronic valve.
In one embodiment of the utility model, the European seventh aftertreatment system of the diesel engine further comprises a first urea injection module disposed on a front end of the first SCR assembly.
In one embodiment of the utility model, the first urea injection module includes a first nozzle and a first urea mixer.
In one embodiment of the utility model, the European seventh aftertreatment system of the diesel engine further comprises a second urea injection module arranged on the front end of the second SCR assembly.
In one embodiment of the utility model, the second urea injection module includes a second nozzle and a second urea mixer.
Compared with the prior art, the European seven post-treatment system of the diesel engine has simple and reasonable structure, can balance the emission and the oil consumption of the engine, and effectively improves the oil consumption of the engine.
Drawings
Fig. 1 is a schematic configuration diagram of an ohv aftertreatment system of a diesel engine according to an embodiment of the present utility model.
The main reference numerals illustrate:
1-first exhaust pipeline, 2-engine, 3-three-way pipeline, 4-second exhaust pipeline, 5-first SCR assembly, 6-first ASC assembly, 7-DOC assembly, 8-DPF assembly, 9-second SCR assembly, 10-second ACS assembly, 11-third exhaust pipeline, 12-first bypass electronic valve, 13-second bypass electronic valve, 14-first urea injection module, 15-second urea injection module.
Detailed Description
The following detailed description of embodiments of the utility model is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the utility model is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
Fig. 1 is a schematic configuration diagram of an ohv aftertreatment system of a diesel engine according to an embodiment of the present utility model. As shown in fig. 1, a euro-seventh aftertreatment system of a diesel engine according to a preferred embodiment of the present utility model includes: a first exhaust line 1, a three-way line 3, a second exhaust line 4, a first SCR assembly 5, a first ASC assembly 6, a DOC assembly 7, a DPF assembly 8, a second SCR assembly 9, a second ACS assembly 10, and a third exhaust line 11. One end of the first exhaust pipe 1 is fixedly connected with the engine 2. The first end of the three-way pipe 3 is connected to the other end of the first exhaust pipe 1. One end of the second exhaust pipeline 4 is connected with the second end of the three-way pipeline 3. The first SCR assembly 5 is arranged on the second exhaust pipe 4. The first ASC assembly 6 is disposed on the second exhaust pipeline 4, and one end of the first ASC assembly 6 is fixedly connected with one end of the first SCR assembly 5, which is far away from the first exhaust pipeline 1. The DOC assembly 7 is provided on the second exhaust line 4. The DPF assembly 8 is arranged on the second exhaust pipeline 4, and one end of the DPF assembly 8 is fixedly connected with one end of the DOC, which is far away from the first ASC assembly 6. The second SCR assembly 9 is disposed on the second exhaust pipe 4, and one end of the second SCR assembly 9 is fixedly connected with the other end of the DPF assembly 8. The second ACS assembly 10 is disposed on the second exhaust pipe 4, and one end of the second ACS assembly 10 is fixedly connected with the other end of the second SCR assembly 9. And one end of the third exhaust pipeline 11 is connected with the third end of the three-way pipeline 3, and the other end of the third exhaust pipeline 11 is connected with the second exhaust pipeline 4 and is positioned at the front end of the DOC assembly 7.
In an embodiment of the utility model, the euro-seventh aftertreatment system of the diesel engine further comprises a first bypass electrovalve 12 and a second bypass electrovalve 13. The first bypass electrovalve 12 is arranged at the joint of the three-way pipeline 3 and the second exhaust pipeline 4. And the second bypass electronic valve 13 is arranged at the joint of the three-way pipeline 3 and the third exhaust pipeline 11.
In an embodiment of the present utility model, the first bypass electrovalve 12 and the second bypass electrovalve 13 are electrically connected to the ECU, respectively, and the ECU is capable of controlling the opening and closing of the first bypass electrovalve 12 and the second bypass electrovalve 13.
In one embodiment of the utility model, the European seven-aftertreatment system of the diesel engine further comprises a first temperature sensor and a second temperature sensor. The first temperature sensor is disposed on the front end of the first SCR assembly 5, and the first temperature sensor is electrically connected with the ECU. And a second temperature sensor is arranged on the front end of the second SCR assembly 9, and the second temperature sensor is electrically connected with the ECU.
In one embodiment of the present utility model, when the first temperature sensor detects that the temperature of the exhaust gas at the front end of the first SCR assembly 5 is higher than 250 ℃, the ECU controls the first bypass electrovalve 12 to be closed and the second bypass electrovalve 13 to be opened.
In one embodiment of the present utility model, when the second temperature sensor detects that the exhaust temperature at the front end of the second SCR assembly 9 is lower than 220 ℃, the ECU controls the second bypass electrovalve 13 to be closed and opens the first bypass electrovalve 12.
In one embodiment of the present utility model, the European seventh aftertreatment system of the diesel engine further comprises a first urea injection module 14 arranged on the front end of the first SCR assembly 5.
In one embodiment of the present utility model, the first urea injection module 14 includes a first nozzle and a first urea mixer.
In one embodiment of the utility model, the euro-seventh after treatment system of the diesel engine further comprises a second urea injection module 15 arranged on the front end of the second SCR assembly 9.
In one embodiment of the utility model, the second urea injection module 15 comprises a second nozzle and a second urea mixer.
In practical application, the European seven post-treatment system of the diesel engine of the utility model can be used for treating pollutants in tail gas of the engine 2 by taking part in the work of the first SCR assembly 5 tightly coupled with the engine 2 when the temperature of the exhaust after the vortex is lower than 220 ℃, and can be used for bypassing the second SCR assembly 9 tightly coupled with the engine 2 when the temperature of the exhaust after the vortex is higher than 250 ℃, so that the back pressure of the engine 2 is reduced, and the oil consumption of the engine 2 can be effectively improved.
In a word, the European seven post-treatment system of the diesel engine has a simple and reasonable structure, can balance the emission and the oil consumption of the engine, and effectively improves the oil consumption of the engine.
The foregoing descriptions of specific exemplary embodiments of the present utility model are presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable one skilled in the art to make and utilize the utility model in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.
Claims (10)
1. An ohseven aftertreatment system for a diesel engine, comprising:
one end of the first exhaust pipeline is fixedly connected with the engine;
the first end of the three-way pipeline is connected with the other end of the first exhaust pipeline;
one end of the second exhaust pipeline is connected with the second end of the three-way pipeline;
the first SCR assembly is arranged on the second exhaust pipeline;
the first ASC assembly is arranged on the second exhaust pipeline, and one end of the first ASC assembly is fixedly connected with one end of the first SCR assembly, which is far away from the first exhaust pipeline;
the DOC assembly is arranged on the second exhaust pipeline;
the DPF assembly is arranged on the second exhaust pipeline, and one end of the DPF assembly is fixedly connected with one end of the DOC, which is far away from the first ASC assembly;
the second SCR assembly is arranged on the second exhaust pipeline, and one end of the second SCR assembly is fixedly connected with the other end of the DPF assembly;
the second ACS assembly is arranged on the second exhaust pipeline, and one end of the second ACS assembly is fixedly connected with the other end of the second SCR assembly; and
and one end of the third exhaust pipeline is connected with the third end of the three-way pipeline, and the other end of the third exhaust pipeline is connected with the second exhaust pipeline and is positioned at the front end of the DOC assembly.
2. The ohseven aftertreatment system of a diesel engine of claim 1, further comprising:
the first bypass electronic valve is arranged at the joint of the three-way pipeline and the second exhaust pipeline; and
the second bypass electronic valve is arranged at the joint of the three-way pipeline and the third exhaust pipeline.
3. The ohseven aftertreatment system of a diesel engine according to claim 2 wherein said first bypass electronic valve and said second bypass electronic valve are each electrically connected to an ECU, and said ECU is capable of controlling opening and closing of said first bypass electronic valve and said second bypass electronic valve.
4. The ohseven aftertreatment system of a diesel engine according to claim 3, further comprising:
the first temperature sensor is arranged at the front end of the first SCR assembly and is electrically connected with the ECU; and
the second temperature sensor is arranged on the front end of the second SCR assembly and is electrically connected with the ECU.
5. The ohv aftertreatment system of the diesel engine of claim 4, wherein said ECU controls said first bypass electronic valve to close and said second bypass electronic valve to open when said first temperature sensor detects that the exhaust temperature at the front end of said first SCR assembly is greater than 250 ℃.
6. The ohv aftertreatment system of the diesel engine of claim 5, wherein said ECU controls said second bypass electronic valve to close and said first bypass electronic valve to open when said second temperature sensor detects that the exhaust temperature at the front end of said second SCR assembly is less than 220 ℃.
7. The ohv aftertreatment system of the diesel engine of claim 1, further comprising a first urea injection module disposed on a front end of the first SCR assembly.
8. The ohseven aftertreatment system of the diesel engine of claim 7, wherein said first urea injection module includes a first nozzle and a first urea mixer.
9. The ohv aftertreatment system of the diesel engine of claim 1, further comprising a second urea injection module disposed on a front end of the second SCR assembly.
10. The ohseven aftertreatment system of a diesel engine of claim 9, wherein the second urea injection module includes a second nozzle and a second urea mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321361143.6U CN220015311U (en) | 2023-05-31 | 2023-05-31 | European seven post-processing system of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321361143.6U CN220015311U (en) | 2023-05-31 | 2023-05-31 | European seven post-processing system of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220015311U true CN220015311U (en) | 2023-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321361143.6U Active CN220015311U (en) | 2023-05-31 | 2023-05-31 | European seven post-processing system of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220015311U (en) |
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2023
- 2023-05-31 CN CN202321361143.6U patent/CN220015311U/en active Active
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