CN203130207U - Air-boosting urea metering jetting system - Google Patents
Air-boosting urea metering jetting system Download PDFInfo
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- CN203130207U CN203130207U CN2013201414791U CN201320141479U CN203130207U CN 203130207 U CN203130207 U CN 203130207U CN 2013201414791 U CN2013201414791 U CN 2013201414791U CN 201320141479 U CN201320141479 U CN 201320141479U CN 203130207 U CN203130207 U CN 203130207U
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- Prior art keywords
- urea
- pump
- motor
- air
- control unit
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The utility model discloses an air-boosting urea metering jetting system, comprising a urea tank for containing urea water solution, a urea pump, an electric control unit, a motor, a catalysis silencer and a jet nozzle arranged on a venting pipe of the motor; the urea pump comprises a magnetic gear pump capable of performing positive pumping and negative sucking, driven by a step motor, and used for connecting the jet nozzle with the urea tank by a liquid pipe, an air pipe is connected between the motor and the jet nozzle, compressed air of the motor performs atomization on the urea water solution in the jet nozzle by the air pipe, the air pipe is provided with an air valve and a pressure sensor, and the urea pump, a controller of the motor and the air valve and the pressure sensor, which are arranged on the air pipe, are all in communication connection with the electric control unit. The air-boosting urea metering jetting system is high in precision and not apt to leak, and the liquid returning pipe-free structure is simple and high in reliability.
Description
Technical field
The utility model belongs to automotive emission control technique field, relates in particular to a kind of for selective catalytic conversion system of diesel engine SCR(Selective Catalyst Reduction) gas help formula urea metering injection system.
Background technique
Be used for selective catalytic conversion system of diesel engine SCR(Selective Catalyst Reduction) refer to be installed in the diesel car vent systems, the NOx in the diesel emission is catalysed and reduced into N
2And O
2Catalytic reduction device, select aqueous solution of urea as reducing agent.Aqueous solution of urea is ejected in the outlet pipe of catalyzer upstream, and hydrolysis is produced as CO under the effect of exhaust gas temperature and air-flow
2And ammonia, ammonia is reduced into free of contamination nitrogen G﹠W as reducing agent with NOx.Urea liquid must be according to the engine operating condition quantitative injection, thus the urea-spray system need with the control unit of engine communication.The working efficiency of SCR depends on gas temperature, and usually gas row temperature reaches that the NOx transformation efficiency can reach more than 85% more than 250 ℃.
Urea pump is divided into air auxiliary type and no air auxiliary type as the core component of SCR system, mainly comprises following form at present:
1) adopt diaphragm pump and stepper motor drive form, but the life-span of barrier film and precision problem are difficult for solving, and system is not when working, internal system has urea, has increased the unusual possibility of system works.
2) adopt the electromagnetic plunge pump form, though the measuring accuracy height exists electromagnet to bring very big electromagnetic interference problem, and the plunger pump sealing problem is difficult to solve.
3) no air auxiliary type ejecting system, urea liquid can not extracted out in urea pump when not working in order to reach system, adopted the selector valve form to realize that the nozzle of this cover system needs sending and receiving motivation cooling water and need have relief function, this systematic comparison complexity.
The model utility content
The purpose of this utility model is to provide a kind of gas to help formula urea metering injection system, this system has that no liquid return pipe is simple in structure, precision is high, is difficult for revealing and high reliability features, to solve the problem that gas helps formula urea metering injection system to exist in the prior art.
For reaching this purpose, the utility model by the following technical solutions:
A kind of gas helps formula urea metering injection system, it comprises the urea tank that holds aqueous solution of urea, urea pump, ECU (Electrical Control Unit), motor, catalytic muffler and be arranged at nozzle on the engine exhaust pipe, wherein, described urea pump comprises the magnetic-gear pump that can just take out with back suction, described magnetic-gear pump is driven by stepper motor, and described magnetic-gear pump is connected urea tank and nozzle by the liquid pipe, be connected with tracheae between described motor and the nozzle, described engine compresses air atomizes to the aqueous solution of urea in the nozzle through tracheae, described tracheae is provided with air valve and pressure transducer, described urea pump, the air valve that arranges on the controller of motor and the tracheae and pressure transducer all communicate to connect with ECU (Electrical Control Unit).
Especially, be provided with pressure transducer in the described urea pump, described pressure transducer and ECU (Electrical Control Unit) communicate to connect.
Especially, be provided with temperature transducer and heater in the described urea pump, described temperature transducer and heater and ECU (Electrical Control Unit) communicate to connect, temperature transducer testing pump inside temperature, and heater can heat under the urea low temperature condition.
Especially, also be provided with decompression venting valve on the described tracheae.
Especially, described ECU (Electrical Control Unit) communicates by self-sensor device or CAN bus and the external world.
The beneficial effects of the utility model are, compared with prior art described gas helps formula urea metering injection system to adopt magnetic-gear pump driven by stepper motors, the power of namely supplying urea plays the accurate measurement effect again, can be with the urea back suction of urea pump and liquid pipe in urea tank when system stops to spray, when making the urea low temperature crystallization, system is not fragile.This system accuracy height, difficult leakage, no liquid return pipe, the reliability height.
Description of drawings
Fig. 1 is the system schematic that gas that the utility model embodiment 1 provides helps formula urea metering injection system.
Embodiment
Further specify the technical solution of the utility model below in conjunction with accompanying drawing and by embodiment.
See also shown in Figure 1ly, Fig. 1 is the system schematic that gas that the utility model embodiment 1 provides helps formula urea metering injection system.
In the present embodiment, a kind of gas helps formula urea metering injection system to comprise the urea tank 1 that holds aqueous solution of urea, urea pump 2, ECU (Electrical Control Unit) 3, motor 4, engine exhaust pipe 5 and be arranged at catalytic muffler 6 and nozzle 7 on the engine exhaust pipe 5, described urea pump 2 comprises the magnetic-gear pump 20 that can just take out with back suction, described magnetic-gear pump 20 is driven by stepper motor 21, and described magnetic-gear pump 20 is connected urea tank 1 and nozzle 7 by liquid pipe 8, be provided with pressure transducer 22 in the described urea pump 2, described pressure transducer 22 communicates to connect with ECU (Electrical Control Unit) 3, and be provided with temperature transducer 23 and heater 24 in the described urea pump 2, described temperature transducer 23 and heater 24 communicate to connect with ECU (Electrical Control Unit) 3, temperature transducer 23 testing pump inside temperatures, heater 24 can heat under the urea low temperature condition.
Be connected with tracheae 9 between described motor 4 and the nozzle 7, be disposed with decompression venting valve 10, air valve 11 and pressure transducer 22 on the described tracheae 9, the aqueous solution of urea of described motor 4 pressurized air in 9 pairs of nozzles 7 of tracheae atomizes.
The air valve 11 that arranges on control means in the described urea pump 2, the controller of motor 4 and the tracheae 9 all is connected by sensor or CAN bus communication with ECU (Electrical Control Unit) 3 with pressure transducer 22.
During work, by urea pump 2 urea is pumped out to nozzle 7 from urea tank 1,, after decompression venting valve 10, with the atomizing of the urea in the nozzle 7, is directly sprayed in the engine exhaust pipe 5 by motor 4 pressurized air.Described ECU (Electrical Control Unit) 3, draws the aqueous solution of urea emitted dose that needs, and accurately controls urea pump and spray through internal calculation according to motor 4 operating modes.The magnetic-gear pump 20 that stepper motor 21 drives, the power of namely supplying urea plays the accurate measurement effect again, the urea back suction of urea pump 2 and liquid pipe 8 can be arrived in the urea tank 1 when stopping to spray in system simultaneously, and when making the urea low temperature crystallization, system is not fragile.
Above embodiment has just set forth basic principle of the present utility model and characteristic; the utility model is not limited by above-mentioned example; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various variations and change, and these variations and change all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. a gas helps formula urea metering injection system, it comprises the urea tank that holds aqueous solution of urea, urea pump, ECU (Electrical Control Unit), motor, catalytic muffler and be arranged at nozzle on the engine exhaust pipe, it is characterized in that, described urea pump comprises the magnetic-gear pump that can just take out with back suction, described magnetic-gear pump is driven by stepper motor, and described magnetic-gear pump is connected urea tank and nozzle by the liquid pipe, be connected with tracheae between described motor and the nozzle, described engine compresses air atomizes to the aqueous solution of urea in the nozzle through tracheae, described tracheae is provided with air valve and pressure transducer, described urea pump, the air valve that arranges on the controller of motor and the tracheae and pressure transducer all communicate to connect with ECU (Electrical Control Unit).
2. gas according to claim 1 helps formula urea metering injection system, it is characterized in that, is provided with pressure transducer in the described urea pump, and described pressure transducer and ECU (Electrical Control Unit) communicate to connect.
3. help formula urea metering injection system according to claim 1 or 2 each described gas, it is characterized in that be provided with temperature transducer and heater in the described urea pump, described temperature transducer and heater and ECU (Electrical Control Unit) communicate to connect.
4. gas according to claim 1 helps formula urea metering injection system, it is characterized in that, also is provided with decompression venting valve on the described tracheae.
5. gas according to claim 1 helps formula urea metering injection system, it is characterized in that, described ECU (Electrical Control Unit) communicates by self-sensor device or CAN bus and the external world.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201414791U CN203130207U (en) | 2013-03-26 | 2013-03-26 | Air-boosting urea metering jetting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201414791U CN203130207U (en) | 2013-03-26 | 2013-03-26 | Air-boosting urea metering jetting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203130207U true CN203130207U (en) | 2013-08-14 |
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ID=48938198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201414791U Expired - Lifetime CN203130207U (en) | 2013-03-26 | 2013-03-26 | Air-boosting urea metering jetting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203130207U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195546A (en) * | 2013-03-26 | 2013-07-10 | 无锡市凯龙汽车设备制造有限公司 | Air-assisted urea measuring injection system |
| CN105019988A (en) * | 2015-08-03 | 2015-11-04 | 包头北大工道发动机技术有限公司 | Vehicle-mounted urea solution metering, ultrasonic atomizing and supplying device |
| CN105019987A (en) * | 2015-08-03 | 2015-11-04 | 包头北大工道发动机技术有限公司 | Vehicle-mounted urea solution metering, atomizing and supplying device |
| CN106593586A (en) * | 2016-11-29 | 2017-04-26 | 潍柴动力空气净化科技有限公司 | Urea injection device for engine SCR system |
-
2013
- 2013-03-26 CN CN2013201414791U patent/CN203130207U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195546A (en) * | 2013-03-26 | 2013-07-10 | 无锡市凯龙汽车设备制造有限公司 | Air-assisted urea measuring injection system |
| CN105019988A (en) * | 2015-08-03 | 2015-11-04 | 包头北大工道发动机技术有限公司 | Vehicle-mounted urea solution metering, ultrasonic atomizing and supplying device |
| CN105019987A (en) * | 2015-08-03 | 2015-11-04 | 包头北大工道发动机技术有限公司 | Vehicle-mounted urea solution metering, atomizing and supplying device |
| CN105019988B (en) * | 2015-08-03 | 2019-07-26 | 包头北大工道发动机技术有限公司 | Vehicle-mounted urea solution metering ultrasonic atomization feedway |
| CN106593586A (en) * | 2016-11-29 | 2017-04-26 | 潍柴动力空气净化科技有限公司 | Urea injection device for engine SCR system |
| CN106593586B (en) * | 2016-11-29 | 2019-07-05 | 潍柴动力股份有限公司 | A kind of urea injection apparatus for engine SCR system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: KAILONG HIGH TECHNOLOGY CO., LTD. Free format text: FORMER NAME: KAILONG AUTOMOBILE EQUIPMENT MANUFACTURING CO., LTD., WUXI CITY |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 214000 Jiangsu city in Wuxi Province Economic Development Zone Huishan District Wuxi Tangqiao temple bridge supporting money Kailong Automobile Equipment Manufacturing Co Ltd Patentee after: KAILONG HIGH TECHNOLOGY Co.,Ltd. Address before: 214000 Jiangsu city in Wuxi Province Economic Development Zone Huishan District Wuxi Tangqiao temple bridge supporting money Kailong Automobile Equipment Manufacturing Co Ltd Patentee before: WUXI KAILONG BUS EQUIPMENT MANUFACTURING Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |
|
| CX01 | Expiry of patent term |