CN113153496A - Device for dosing an aqueous solution in an exhaust pipe of a vehicle - Google Patents
Device for dosing an aqueous solution in an exhaust pipe of a vehicle Download PDFInfo
- Publication number
- CN113153496A CN113153496A CN202011519424.0A CN202011519424A CN113153496A CN 113153496 A CN113153496 A CN 113153496A CN 202011519424 A CN202011519424 A CN 202011519424A CN 113153496 A CN113153496 A CN 113153496A
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- CN
- China
- Prior art keywords
- aqueous solution
- exhaust pipe
- dosing
- injector
- sleeve
- 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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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1486—Means to prevent the substance from freezing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
本公开涉及用于在车辆的排气管中剂量给送水溶液的装置。本公开提出了一种用于在车辆的排气管（106）中剂量给送水溶液的装置（100）。该装置包括壳体、焊接到壳体（102）的法兰（105）和至少喷射器（101）。喷射器（101）位于壳体（102）的内部。该装置的特征在于套筒（107），该套筒（107）安装在喷射器（101）的尖端的周边上并且在法兰（105）的内部。套筒（107）具有带有方向瓣片的入口端口（103）和出口端口（104）。套筒（107）具有截头锥体的形状。
The present disclosure relates to a device for dosing an aqueous solution in an exhaust pipe of a vehicle. The present disclosure proposes a device (100) for dosing an aqueous solution in an exhaust pipe (106) of a vehicle. The device includes a housing, a flange (105) welded to the housing (102) and at least an injector (101). The injector (101) is located inside the housing (102). The device is characterized by a sleeve (107) mounted on the periphery of the tip of the injector (101) and inside the flange (105). The sleeve (107) has an inlet port (103) and an outlet port (104) with directional flaps. The sleeve (107) has the shape of a frustum.
Description
Technical Field
The present disclosure relates to a device for dosing an aqueous solution in an exhaust pipe of a vehicle.
Background
Exhaust gas treatment devices and strategies widely used in vehicles ensure that the exhaust gas is treated and that harmful emissions leaving the vehicle are kept as low as possible. The most popular exhaust treatment device and strategy is to dose an aqueous solution to treat the oxides of nitrogen. One of the many components of the exhaust gas is the different oxides of nitrogen, which contribute to the greenhouse effect and other types of pollution. Thus, emission standards worldwide require that nitrogen oxides be treated to convert them to elemental nitrogen before being released into the atmosphere. One of the most popular methods of treating exhaust gases to convert nitrogen oxides to elemental nitrogen is through the use of aqueous solutions.
An aqueous solution dosing device is used downstream of the exhaust pipe. The dosing mechanism doses a metered amount of the aqueous solution into the exhaust path. A metered amount of the aqueous solution reacts with and converts the oxides of nitrogen to elemental nitrogen. The dosing device comprises an injector, which is a device responsible for dosing a metered amount of aqueous solution in the exhaust path. The injector sprays a metered amount of an aqueous solution. Packaging constraints in vehicles have led to the widespread use of compact mixing sections for mixing aqueous solutions with exhaust gases. These compact mixing sections result in multiple recycles of aqueous vapor near the injector tip at the time of dose delivery. Recirculation near or towards the injector tip causes crystallization and deposition of the aqueous solution on the tip. This will lead to malfunction of the dose delivery system due to clogging of the injector.
Patent application WO13035112a1 "a device for dosing an aqueous solution in an exhaust gas path" discloses a device for dosing an aqueous solution in an exhaust gas path. The device comprises a dosing module with a dosing valve. The device features a flange located in the exhaust path. The flange interface includes a protection feature and a mounting feature at an end of the flange distal from the vent path, and a heat sink on the flange interface adapted to receive the dose delivery valve. However, this design does not address the problem of injector tip crystallization as discussed above.
Drawings
Embodiments of the present invention are described with reference to the following drawings.
Fig. 1 depicts an apparatus (100) for dosing an aqueous solution in an exhaust pipe of a vehicle.
Detailed Description
Fig. 1 depicts an apparatus (100) for dosing an aqueous solution in an exhaust pipe (106) of a vehicle. The device comprises a housing, a flange (105) welded to the housing (102) and at least an injector (101). An injector (101) is located inside the housing. The device is characterized by a sleeve (107) mounted on the periphery of the tip of the injector (101) and inside the flange (105). The sleeve (107) has an inlet port (103) with a direction flap and an outlet port (104). The sleeve (107) has the shape of a truncated cone.
In an embodiment, the device (100) for dosing an aqueous solution in an exhaust pipe (106) is mounted vertically at right angles on top of the exhaust pipe (106). In another embodiment of the invention, the device (100) for dosing an aqueous solution in an exhaust pipe (106) is mounted at various angles inclined with respect to the circular cross section of the exhaust pipe (106). In the embodiments of the invention described above, where the device (100) is mounted vertically and at right angles on top of the exhaust pipe (106), the need for a flange may be eliminated. In this embodiment, the housing (102) is welded to the exhaust pipe (106), and the sleeve (107) is placed inside the exhaust pipe (106). The inlet port (103) and the outlet port (104) of the sleeve (107) play an important role here by allowing exhaust gas to enter the sleeve (107) and avoiding the build up of back pressure in the exhaust pipe (106).
An injector (101) located inside the housing (102) injects a diesel exhaust treatment fluid into the exhaust pipe. The diesel exhaust fluid includes an aqueous urea-based solution. The urea-based solution is used to carry out a selective catalytic reaction in an exhaust pipe (106). When such a urea-based aqueous solution is injected into the exhaust pipe, the urea-based aqueous solution (aqueous urea) evaporates and decomposes to form ammonia and carbon dioxide. Further, ammonia reacts with nitrogen oxides (NOx) and reduces them to water and elemental nitrogen, both of which are harmless. These are then released through the exhaust pipe.
Exhaust gas arriving through the pipe enters the device through the flange (105). In conventional systems, the swirling motion of the gas inside the flange (105) causes crystallization of the urea injected by the injector (101). An important aspect of the invention is therefore the sleeve (107) of the injector (101). The sleeve (107) of the injector (101) prevents an undesirable amount of exhaust gas from entering the area near the injector (101). The sleeve (107) of the ejector (101) is further provided with an inlet port (103) and an outlet port (104). These inlet (103) and outlet (104) ports allow an optimal amount of exhaust gas to enter the flange (105) to avoid building up back pressure.
Further, the inlet (103) and outlet ports (104) of the sleeve (107) are provided with directional flaps. These directional flaps ensure that exhaust gas and water vapor are directed towards the exhaust pipe (106) and are not allowed to recirculate near the tip of the injector (101). Further, the cone angle of the sleeve (107) will be larger than the spray cone angle to avoid spray impingement on the wall of the sleeve (107). The sleeve (107) will force the flow downward, away from the tip of the urea injector (101), thereby reducing the likelihood of urea vapor moving toward the tip of the injector (101).
The concept of developing a device for dosing an aqueous solution in an exhaust pipe (106) of a vehicle improves the efficiency of the injector (101) and the selective catalytic system as a whole. In conventional systems, this affects the efficiency of NOx conversion as crystals begin to grow around the tip of the injector. To remove these crystals, a maintenance regeneration needs to be triggered in the system. In this case, the operating temperature of the injector tip was brought to > 450 degrees celsius to remove crystals. However, this process causes additional fuel to be burned and reduces fuel efficiency.
It must be understood that the embodiments explained in the above detailed description are illustrative only and do not limit the scope of the present invention. Any modification of the device for dosing an aqueous solution in an exhaust pipe (106) of a vehicle is envisaged and forms part of the present invention. Accordingly, many modifications and embodiments are contemplated as being within the scope of the invention. The scope of the invention is limited only by the claims.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN201941053084 | 2019-12-20 | ||
| IN201941053084 | 2019-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113153496A true CN113153496A (en) | 2021-07-23 |
Family
ID=76882696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011519424.0A Pending CN113153496A (en) | 2019-12-20 | 2020-12-21 | Device for dosing an aqueous solution in an exhaust pipe of a vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113153496A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110047974A1 (en) * | 2009-08-27 | 2011-03-03 | Cary Henry | Exhaust flow segregator and associated systems and methods |
| US20110094206A1 (en) * | 2009-10-27 | 2011-04-28 | Cummins Filtration Ip, Inc | Reductant injection and decomposition system |
| WO2013035112A1 (en) * | 2011-09-08 | 2013-03-14 | Robert Bosch Engineering And Business Solutions Limited | A device for dosing an aqueous solution in an exhaust gas path |
| CN103282615A (en) * | 2011-12-27 | 2013-09-04 | 株式会社小松制作所 | Mixing device for reducing agent aqueous solution and exhaust gas post-processing device |
| CN105120993A (en) * | 2013-04-12 | 2015-12-02 | 利勃海尔机械布尔有限公司 | Reductant injection in an exhaust system |
-
2020
- 2020-12-21 CN CN202011519424.0A patent/CN113153496A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110047974A1 (en) * | 2009-08-27 | 2011-03-03 | Cary Henry | Exhaust flow segregator and associated systems and methods |
| US20110094206A1 (en) * | 2009-10-27 | 2011-04-28 | Cummins Filtration Ip, Inc | Reductant injection and decomposition system |
| WO2013035112A1 (en) * | 2011-09-08 | 2013-03-14 | Robert Bosch Engineering And Business Solutions Limited | A device for dosing an aqueous solution in an exhaust gas path |
| CN103282615A (en) * | 2011-12-27 | 2013-09-04 | 株式会社小松制作所 | Mixing device for reducing agent aqueous solution and exhaust gas post-processing device |
| CN105120993A (en) * | 2013-04-12 | 2015-12-02 | 利勃海尔机械布尔有限公司 | Reductant injection in an exhaust system |
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