CN106285854B - A kind of SCR liquid injection apparatus - Google Patents
A kind of SCR liquid injection apparatus Download PDFInfo
- Publication number
- CN106285854B CN106285854B CN201510228651.0A CN201510228651A CN106285854B CN 106285854 B CN106285854 B CN 106285854B CN 201510228651 A CN201510228651 A CN 201510228651A CN 106285854 B CN106285854 B CN 106285854B
- Authority
- CN
- China
- Prior art keywords
- injector
- valve
- injection
- nozzle
- armature
- 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.)
- Active
Links
Classifications
-
- 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
-
- 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
- Y02T10/12—Improving ICE efficiencies
Abstract
A kind of SCR liquid injection apparatus, including metering units and the injector being installed on the exhaust pipe of engine, the injector includes a cooling device, to prevent injector from being damaged by exhaust high temperature.The metering units can be solenoid pulse pump installation, provide pressure solution for injector, high-pressure solution is atomized to spray into exhaust pipe and mix with exhaust by injector.The cooling device includes a heat exchanger, e.g., cooling fin.The heat of injector is taken in atmosphere by heat convection and heat radiation mode.The cooling device is also possible to a high pressure air cooling device, and the heat of injector is taken away using the air stream entered from gas passage.
Description
Technical field
The invention belongs to engine exhaust post-processing technology fields, and in particular to the NOx selection of engine exhaust post-processing
Catalysis reduction (SCR) system and its control technology.
Background technique
Liquid injection metering is widely used more particularly to internal combustion engine moving in fields such as chemical industry, medical treatment and dynamic power machines
The multinomial core technology of power.For example, the direct spray petrol engine in cylinder of diesel engine or lean burn, to reduce having in tail gas
Evil pollutant, for NOx pollutant, using the NOx selective catalysis of catalysis reduction treatment can be carried out under oxygen-enriched environment also
Former (SCR=Selective Catalytic Reduction) technology.For the granular material discharged of diesel engine, using diesel engine
Particulate matter filter traps (DPF=Diesel Particulate Filter) technology etc..
SCR technology needs (to be also the aqueous solution of urea of such as 32.5% weight concentration to diesel exhaust gas treatment fluid DEF=
Diesel Exhaust Fluid, or add blue liquid AdBlue) metered injection into diesel exhaust gas, decomposed by exhaust high temperature
At ammonia, enter SCR catalytic converter after mixing with exhaust.Under the effect of the catalyst, ammonia will in engine exhaust
NOx etc. catalytic reduction reaction occurs, so that NOx is decomposed into harmless N2、H2O.If the NOx content in DEF the amount of injection and exhaust
Do not match that, then or NOx can not be reduced sufficiently decomposition, discharge amount increases or remaining many ammonias are discharged to atmosphere
In, cause secondary pollution.Therefore SCR system is necessarily required to the higher SCR metering jetting device of precision and atomizing effect is good
Spray solution.Therefore, by injector be installed on the mode on exhaust pipe with its accuracy of spray, flexibility, extensive adaptability and compared with
It the advantages that low cost, is widely adopted.
However, exhaust pipe mount scheme has higher selectivity to injector itself.Firstly, since exhaust high temperature may be led
Injector is caused the crystalline solid after chemical change occur, so as to cause serious consequences such as pipeline blockage or injector failures.In addition,
Due to the characteristic of urea itself, phenomena such as remaining solution is likely to occur crystallization or crystallization in pipeline and block injector.
To sum up, solve the problems, such as that exhaust high temperature is to injector damage and residual solution knot in SCR system with the prior art
The problems such as crystalline substance, precipitation is an important research topic.It is proposed that a kind of structure is simple, high reliablity, convenient for the new technology of application
Scheme be also very it is necessary to.
Summary of the invention
The present invention in view of the above-mentioned problems, be designed to provide that a kind of structure is simple, and adaptability is good, control it is with high accuracy after
Injection apparatus is handled, undesirable gas assisted atomization is applied especially to and removes the SCR injection metering system of residual solution.
To achieve the above object, the present invention takes following technical scheme, that is, a kind of SCR liquid injection apparatus, including one kind
SCR liquid injection apparatus, including metering units and the injector being installed on the exhaust pipe of engine.The injector includes one
A cooling device, to prevent injector from being damaged by exhaust high temperature.The metering units can be solenoid pulse pump installation, for spray
Emitter provides pressure solution, and high-pressure solution is atomized to spray into exhaust pipe and mix with exhaust by injector.Metering units and injection
It can be connected to by high pressure between device.
The cooling device includes a heat exchanger, e.g., cooling fin.It will be sprayed by heat convection and heat radiation mode
The heat of device takes in atmosphere.
Further, the cooling device includes a gas passage, and a gas source, a storage pressure-volume product, one leads to storage
The check valve of pressure-volume product, the storage pressure-volume product are connected with gas source, can store high pressure gas in advance.Cooling device is utilized from storage pressure-volume product
The stable air stream of entrance takes away the heat of injector.Meanwhile the vacuum field generated around injector when injector injection solution
Windstream can be further speeded up and be formed, cooling effect is enhanced.
The gas source can be automotive air intake booster.
The injector includes an injector valve by opened by pressure, and pressure difference reaches injector before and after injector valve
When default cracking pressure, injector valve is opened and sprays urea solution.The injector valve can be a ball valve either one
Poppet.The ball valve injector includes a spray orifice, and the flow of injector is limited by the size of spray orifice.The poppet injection
Size and lift limit of the flow of device by poppet valve member.
Further, the injector includes an eddy flow road.Eddy flow road is formed and is sprayed between injector valve and spray orifice
The vertical tangential velocity in direction is penetrated to be conducive to be atomized.
For above-mentioned injector, another alternative plan are as follows: the injector is one and opens by electromagnetic force
Electromagnetism nozzle group valve, including a magnetic injectors valve and spray orifice.Magnetic injectors valve is opened under the driving of electromagnetic force, spray
The amount of penetrating is determined by the time that magnetic injectors valve is opened.
In order to improve the measuring accuracy of injection, one is formed in infusion pipeline by pulse pump and a pressure sensor
Constant pressure source, the pressure sensor are mounted in infusion pipeline, and the closed loop to pulse pump is realized by the signal of pressure sensor
Control is to reach the constant target of infusion pipeline pressure, to achieve the purpose that improve injector measuring accuracy.
A kind of SCR spraying system using the SCR liquid injection apparatus, is installed on exhaust pipe including one
Injector, one is located at the injection vacuum plant of injector upstream.The injector is by the metering units are injection vacuum holding
Offer driving fluid is set, when last handling process terminates, solution is flowed out by injection vacuum plant, and flow at high speed liquid is in injector
Negative pressure is formed to section between induction apparatus, residual solution in pipeline is cleaned with pumpback.
Above-mentioned, SCR system includes a urea tank, an end cap, a bracket.The metering units include a metering
Pump, the metering pump can be solenoid plunger pump, be installed on one end of bracket, and stretch to the bottom of urea tank by bracket
Portion, solution can be by reentering in metering pump certainly.The other end of bracket is fixed on end cap, end cap be installed on urea tank it
Top.The injection vacuum plant installation is located at the outside of urea tank on end cap.
The invention will be described in further detail with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is one of the emitter construction schematic diagram of SCR liquid injection apparatus provided by the invention.
Fig. 2 is the two of the emitter construction schematic diagram of SCR liquid injection apparatus provided by the invention.
Fig. 3 is one of the cooling device structural schematic diagram of SCR liquid injection apparatus provided by the invention.
Fig. 4 is the cooling device second structural representation of SCR liquid injection apparatus provided by the invention.
Fig. 5 is one of the example structure schematic diagram of SCR liquid injection apparatus provided by the invention.
Fig. 6 is the two of the example structure schematic diagram of SCR liquid injection apparatus provided by the invention.
Specific embodiment
As shown in Figure 1, being the emitter construction schematic diagram of SCR liquid injection apparatus provided by the invention, including an institute
Stating injector 1 includes a filter 10, an injection valve 5 by opened by pressure, an eddy flow road 4, an eddy flow spray orifice
3, a cooling device 2.
The injection valve 5 by opened by pressure includes valve seat a 5a, a valve member 5b and a valve spring 5c.The rotation
Runner 4 be located at injection valve 5 go out liquid direction front end, highly pressurised liquid by injection valve 5 extrude after enter eddy flow road 4, after eddy flow by
Eddy flow spray orifice 3 is sprayed in spray pattern.Injection valve 5 can be the either outward opening poppet of ball valve.
The concrete structure schematic diagram of the cooling device 2 is as shown in figure 3, include gas passage 12, gas source 15, storage pressure-volume product
15b leads to the check valve 15a of storage pressure-volume product, 1 ontology mounting hole 13 of injector, location hole 11.Cooling device 2 passes through injector
1 mounting hole 13 of ontology is installed on 1 ejection end of ejector body, and closely connect with ejector body 1.The gas passage 12 connects
Gas source 15 is connect, cooling device 2 utilizes the heat taken away from injection valve 5 from the air stream that storage volumes 15b enters.In addition, injection
The vacuum field generated around when valve 5 sprays solution can also further speed up and be formed windstream, play better cooling
Effect.
15 air of gas source can be the air inlet of vehicle brake or booster, especially after intercooler into
Gas.
A kind of alternative plan of above-mentioned cooling device 2 dissipates as shown in figure 4, including one by air cooled
Hot device 14 is taken the heat of injector in atmosphere to by heat convection and heat radiation mode.
Further, above-mentioned injector 1 includes that an electromagnetic jet valve opens holding meanss 6.The unlatching holding meanss 6
Including a spiral piping arrangement 7, an armature 8, a mandril 9.The spiral piping arrangement 7 includes a signal receiving port 7a.
The armature 8 includes the armature slot 8a that is unidirectionally open and through slot 8b circumferentially, the channel that through slot 8a enters as liquid.Institute
It states mandril 9 and armature 8 is coaxially arranged, one end is placed in armature slot 8a, and fixed, and the mandril other end acts on valve spring 5c.
Armature 8 drives mandril 9 to move under electromagnetism power drive, and mandril 9 overcomes the valve spring power of injection valve 5 that injection valve 5 is kept it turning on,
To form driving fluid movement in injection state.
The course of work of above-mentioned injector 1 is as follows.
The high-pressure injection liquid provided by metered injection unit (not shown) is after the filtering of filter 10, into injection road
16, when solution pressure, which reaches injection valve 5, presets cracking pressure, injection valve 5 is opened, and injection liquid enters eddy flow road 4, after eddy flow
Solution sprayed by the atomization of eddy flow spray orifice 3, the amount of injection of the injection valve 5 determines by the size and lift of valve member 5b.Meanwhile
The liquid of high speed ejection forms negative pressure around jet port, further results in the directed flow into gas, improves cooling effect.
When system enters injection state, spiral piping arrangement 7 drives armature 8 and mandril 9, keeps it turned on injection valve 5.Due to
The negative pressure that upper end generates, injector 1 form the fluid motion drawn back, and suck extraneous gas by eddy flow spray orifice 3 to clean residual
The injection liquid of (not shown) in injector 1 and front-end pipelines.
Fig. 2 is the emitter construction schematic diagram of SCR liquid injection apparatus provided by the invention, with provided by the invention first
The main distinction of structural schematic diagram and the second structural schematic diagram is: the injector 1 is an electromagnetism nozzle.The electromagnetism spray
Mouth 1 includes an electromagnetic control components 20, an interior valve opening 30, a liquid inlet port 23, spray nozzle front end 29, cooling device 2.
Electromagnetic control components 20 include nozzle solenoid coil 26, magnetic yoke 28, magnetic gap 28a and nozzle armature 25.Inside open
Valve 30 includes valve member 32, the valve seat 31 of the 31a containing seat surface, the valve rod 32a connecting with nozzle armature 25, interior valve opening pressing spring 22, valve
Part 32 is connected with valve rod 32a and nozzle armature 25, and welding manner can be used, and sets between valve rod 32a and nozzle armature 25
There is liquid channel 27.Spray nozzle front end 29 includes spray orifice 29a, spray orifice 29a can be it is angled porous, in liquid inlet port 23
Inlet is disposed with a nozzle filter device 24.
Under normal conditions, since spring force and solution pressure act on, interior valve opening 30 is in close state.When nozzle solenoid 26
Receive controller (not shown) working signal, nozzle armature 25 drives valve member 32 and valve rod 32a to overcome interior valve opening pressing spring
22 resistance moves upwards, and gap 25a represents the maximum lift of interior valve opening 30, and at this moment solution passes through electricity by nozzle filter 24
Pivot inner hole 25b, liquid passing channle 27 and nozzle flow channel 27a reach interior valve opening 30, then spray to form spraying 30 by spray orifice 29a.
When system enters solution and draws back the stage, interior valve opening 30 is opened, injection liquid is sprayed from spray orifice 29, and ambient atmos are logical
It crosses spray orifice 29a to enter in 1 body of electromagnetism nozzle, together with liquid therein by pumpback to fluid reservoir.
In above scheme, if the front end fluid pressure of liquid inlet port 23 is constant, by the amount of injection of spray orifice 29a just with it is interior
The opening time of valve opening 30 is directly proportional.
Fig. 5 show one of the example structure schematic diagram of SCR liquid injection apparatus provided by the invention, including a urine
Plain tank 35, a bracket 36, an end cap 37, a pulse pump 38, a high-voltage tube 39, an injector 2, an injection are true
Empty device 40, a controller 41, one has the exhaust pipe 43 of SCR catalytic converter 42, along exhaust stream direction successively cloth
It is equipped with temperature sensor 44 and NOx or ammonia gas sensor 45, is located at 42 two sides of catalyst.
Above-mentioned bracket 36 includes pulse pump fixed station 46 and cooling water heater 47.The end cap 37 is located at pump bracket 36
One end, pulse pump 38 is mounted on the fixed station 46 of pump 36 other end of bracket, and the bracket 36 is fixed on urine by end cap 37
Plain 35 upper surface of tank, the other end are placed in 35 bottom of urea tank together with the pulse pump 38 being fixed on fixed station 46.
Above-mentioned end cap 37 includes each sensor (including the temperature sensor 48, liquid level sensor inside the urea tank 35
49 etc.) and cooling water feed liquor interface 50 and liquid interface 51 out, cooling water heater pass through liquid inlet and outlet interface (50,51) and hair
The connection of motivation cooling water channel (not shown), to solve the problems, such as icing of urea solution in each workpiece, temperature sensor 48 can be with
It is encapsulated in the circuit protection pipe of liquid level sensor 49.
Above-mentioned injection vacuum plant 40 and controller are installed on end cap 37, are placed in the outside on 35 top of urea tank.Institute
Stating injection vacuum plant 40 includes one for fluid passage 52, an injection road 53, an injection road 54, a switching device 55.Institute
It states injection road 54 and the urea liquid for entering injection vacuum plant is led back to by urea tank 35 by pipeline.The controller 41 is for giving
Each control valve member and pulse pump working signal out store each sensor information and from Engine ECU (not shown)
Signal.
Above-mentioned high-voltage tube 39 connects pulse pump 38 and injection vacuum plant 40, connection type can be quickly patch or
Person is that sealing is threadedly coupled.Pulse pump 38 provides injection fluid and driving fluid for system.
Above-mentioned injector 1 is installed on as shown in Figure 1, the cooling device 2 including a dependence airflow radiating by location hole 11
On 43 erecting bed 56 of exhaust pipe, and locked by bolt 57.The liquid inlet channel 58 of the injector 1 includes a quick-joint male head
One end female 59a of 58a, the injection catheter 59 with both ends with quick-joint mother head are docked, and the other end and injection of injection catheter 59 are true
The injection road 53 of empty device 40 is connected to.
The course of work of the SCR system of aforementioned present invention is as follows.
When system is in original state, switching device 55 and electromagnetic opening devices 6 are in close state.Pulse pump 38 will
Working solution pumps out in urea tank 35, enters entering for fluid passage 52 for injection vacuum plant 40 through high-voltage tube 39, since switching fills
55 closings are set, high-pressure solution enters injection catheter 59 through injection road 53, and is installed on exhaust pipe 43 by solution pressure unlatching
On injector 1, the form that urea liquid is atomized is injected into exhaust pipe 43, and in the work of 44 high temperature of engine exhaust
It is ammonia with lower pyrolysis, is uniformly mixed with engine exhaust and enters SCR catalytic converter 42, NOx therein will be by efficient-decomposition
For harmless N2And H2O achievees the purpose that cleaning of off-gas.Real-time measurement is vented warm by temperature sensor 45 and NO sensor 46
Perhaps ammonia concentration feeds back to controller or engine controller (not shown) to the NOx concentration in degree and 42 downstream of converter, uses
In judging SCR system to the transfer efficiency of NOx, the real-time closed-loop amendment to the working solution of injection is determined.Meanwhile check valve 15a
It opens, the air that gas source 15 provides enters gas passage 12 through gas-guide tube 60 from storage volumes 15a, and around injection valve 5, utilizes
Air stream takes away the heat of nozzle group valve 5.In addition, the vacuum field generated around when injection valve 5 sprays solution can also further add
Speed and formation windstream, enhance cooling effect.
At the end of course of injection, controller 41 provides signal, and pulse pump 38 is made to keep work with given injection flow
State.Controller 41 drives switching device 55 and electromagnetic opening devices 6 to open.Injection of the urea liquid from injection vacuum plant 40
Urea tank 35 is flowed back in the output of road 54.And fluent solution then injection road 53 at generate vacuum pressure difference, at this point, due to injector 1 it
It opens holding meanss 6 and acts in the open state, gas in exhaust pipe 43 is inhaled by injector 1, until injection vacuum holding
The injection road 53 for setting 40 forms reflux gas, to achieve the purpose that pumpback cleans residual solution in pipeline.After pumpback,
Engine dead halt, then injector 1 is closed.
Gas source 15 described in the application example is the air inlet of vehicle Charge device, the especially air inlet after intercooler.Diagram is calmed the anger
Machine 61 is driven by engine exhaust turbine 62, will it is atmospheric compressed after be sent into intercooler 63, then becoming has pressure and temperature
Not high engine charge is imported into motor intake manifold (not shown).Exhaust gas turbine 62 is using from engine exhaust
The engine exhaust 64 of manifold (not shown) works, and the engine exhaust that exhaust gas turbine 62 is discharged enters the exhaust pipe of engine
43.Engine charge 60a of the gas source 15 after charge inter cooling.
Fig. 6 is the 3rd embodiment structural schematic diagram of SCR spraying system provided by the invention, with provided by the invention first
One of main distinction of embodiment is: the injector 1 is a magnetic injectors valve (as shown in Figure 2).Pass through bolt 43
It is installed on exhaust pipe 43, after controller 41 issues the driving signal of given pulsewidth, switch valve is opened, by metered injection
Liquid is spurted into exhaust pipe 43, and enters catalytic converter 42 after mixing with tail gas stream 44, and processing is exhausted.Course of injection
When terminating to enter pumpback state, injection valve 5 is kept it turned on, and the switching device 55 of injection vacuum plant 40 is switched on simultaneously
State is opened, system enters pumpback process.It is with the two of the main distinction of first embodiment provided by the invention: pacifies including one
Loaded on the pressure sensor 66 on injection catheter 59, sealed by gasket 67.Pressure sensor 66 includes a pin interfaces
68, it is connect with controller 41.Controller 41 realizes the closed-loop control to pulse pump 38 by the pressure signal of pressure sensor 66,
To achieve the purpose that pressure is constant in injection catheter 59, to improve the precision of injector metering.With provided by the invention first
The three of the main distinction of embodiment are: the cooling device 2 is a radiator fin device, passes through heat convection and heat radiation side
Formula takes heat at injection valve 5 in atmosphere to.
SCR spraying system provided by the invention and other further embodiments based on spirit of the invention belong to this
Within the scope of disclosure of the invention and protection.
Claims (7)
1. a kind of SCR liquid injection apparatus, including metering units and the injector being installed on the exhaust pipe of engine, feature
Be: the injector includes a filter, an injection valve by opened by pressure, an eddy flow road, an eddy flow spray
Hole and electromagnetic jet valve open holding meanss, and when reaching institute's constant-pressure, nozzle group valve is opened, described by opened by pressure
Injection valve includes a valve seat, a valve member and a valve spring, and the eddy flow road is located at the front end that injection valve goes out liquid direction, high pressure
Liquid enters eddy flow road after being extruded by injection valve, is sprayed by eddy flow spray orifice in spray pattern after eddy flow, the electromagnetic type injection
It includes a spiral piping arrangement that valve, which opens holding meanss, and an armature, a mandril, the spiral piping arrangement includes a signal
Receiving port, the armature include the armature slot being unidirectionally open and through slot circumferentially, the channel that through slot enters as liquid, institute
It is coaxially arranged with armature to state mandril, one end is placed in armature slot, and fixed, and the mandril other end acts on valve spring, and armature exists
Mandril movement is driven under electromagnetism power drive, mandril overcomes the valve spring power of injection valve that injection valve is kept it turning on, so as in injection
State forms driving fluid movement；Or the injector is an electromagnetism nozzle, injector open state is given by control signal
Out, the electromagnetism nozzle includes an electromagnetic control components, an interior valve opening, a liquid inlet port, spray nozzle front end, Electromagnetic Control portion
Part includes nozzle solenoid coil, magnetic yoke, magnetic gap and nozzle armature, and interior valve opening includes valve member, the valve seat containing seat surface, with nozzle
The valve rod of armature connection, interior valve opening pressing spring, valve member is connected with valve rod and nozzle armature, between valve rod and nozzle armature
It was equipped with liquid channel, spray nozzle front end includes spray orifice, is disposed with a nozzle filter device in the inlet of liquid inlet port；The injection
Device further includes a cooling device, and to prevent injector from being damaged by exhaust high temperature, the metering units provide pressure for injector
High-pressure solution is atomized to spray into exhaust pipe and mix with exhaust by solution, injector.
2. SCR liquid injection apparatus as described in claim 1, it is characterised in that: the cooling device includes a heat exchange
Device is taken the heat of injector in atmosphere to by heat convection and heat radiation mode.
3. SCR liquid injection apparatus as claimed in claim 1 or 2, it is characterised in that: the cooling device includes a gas
The heat of injector is taken away in source using high-velocity fluid.
4. SCR liquid injection apparatus as claimed in claim 3, it is characterised in that: the gas source is vehicle intake booster.
5. SCR liquid injection apparatus as claimed in claim 4, it is characterised in that: including a storage pressure-volume product, one leads to storage
The check valve of pressure-volume product, the storage pressure-volume product are connected with gas source.
6. SCR liquid injection apparatus as described in claim 1, it is characterised in that: the injector includes an eddy flow road, position
In the ejiction opening of injector.
7. a kind of SCR system using SCR liquid injection apparatus as claimed in claim 6, it is characterised in that: be located at including one
The vacuum induction apparatus of injector upstream, when last handling process terminates, solution is flowed out by vacuum induction apparatus, and in injector
Vacuum is formed to section between induction apparatus, residual solution in pipeline is cleaned with pumpback.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510228651.0A CN106285854B (en) | 2015-05-07 | 2015-05-07 | A kind of SCR liquid injection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510228651.0A CN106285854B (en) | 2015-05-07 | 2015-05-07 | A kind of SCR liquid injection apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106285854A CN106285854A (en) | 2017-01-04 |
| CN106285854B true CN106285854B (en) | 2019-08-27 |
Family
ID=57630659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510228651.0A Active CN106285854B (en) | 2015-05-07 | 2015-05-07 | A kind of SCR liquid injection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106285854B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200224567A1 (en) * | 2017-10-03 | 2020-07-16 | Volvo Lastvagnar Ab | Process consisting in cooling at least one component, such as a sensor, arranged within a compartment of an exhaust after treatment system of a vehicle |
| CN108425725B (en) * | 2018-03-26 | 2023-12-05 | 浙江爱力浦科技股份有限公司 | Water-cooled air auxiliary type automatic control urea solution injection system |
| US10704444B2 (en) * | 2018-08-21 | 2020-07-07 | Tenneco Automotive Operating Company Inc. | Injector fluid filter with upper and lower lip seal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840014A (en) * | 2011-06-20 | 2012-12-26 | 杭州银轮科技有限公司 | Air-assisted injection system for diesel engine urea after-treatment SCR (Selective Catalytic Reduction) system |
| DE102011086017A1 (en) * | 2011-11-09 | 2013-05-16 | Robert Bosch Gmbh | dosing |
| CN103256106A (en) * | 2012-12-28 | 2013-08-21 | 湖南吉利汽车部件有限公司 | SCR (selective catalytic reduction) injection system without pneumatic assistance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6279603B1 (en) * | 1998-10-01 | 2001-08-28 | Ambac International | Fluid-cooled injector |
-
2015
- 2015-05-07 CN CN201510228651.0A patent/CN106285854B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840014A (en) * | 2011-06-20 | 2012-12-26 | 杭州银轮科技有限公司 | Air-assisted injection system for diesel engine urea after-treatment SCR (Selective Catalytic Reduction) system |
| DE102011086017A1 (en) * | 2011-11-09 | 2013-05-16 | Robert Bosch Gmbh | dosing |
| CN103256106A (en) * | 2012-12-28 | 2013-08-21 | 湖南吉利汽车部件有限公司 | SCR (selective catalytic reduction) injection system without pneumatic assistance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106285854A (en) | 2017-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203175653U (en) | Liquid-state reducing agent injection system | |
| CN103201473B (en) | Integrated SCR reducing agent storage device | |
| CN102269031B (en) | Universal type selective catalytic reduction (SCR) injection system | |
| CN204344341U (en) | A kind of Liquid inject batching unit | |
| CN105822394A (en) | Gas-liquid mixing type engine exhaust after-treatment jet apparatus | |
| CN106285854B (en) | A kind of SCR liquid injection apparatus | |
| WO2015154640A1 (en) | Scr injection metering module and control method | |
| CN105986864B (en) | A kind of SCR spraying system | |
| CN108590820A (en) | A kind of urea injection system and its control method of crystallization-preventive | |
| CN109173725A (en) | A kind of marine low speed diesel engine exhaust gas plenum chamber with catalytic denitration function | |
| CN202132088U (en) | Universal SCR spraying system | |
| CN202157846U (en) | Air-assisted injection system for diesel engine post-treating urea silicon controlled rectifier (SCR) system | |
| CN105822393B (en) | A kind of gas assisted atomization liquid meter injection apparatus | |
| US10634126B2 (en) | Constant-volume metering pump | |
| CN107420164A (en) | Tyre urea nozzle air cools down the urea injection system and application method of branch road | |
| CN103470351A (en) | Diesel engine tail gas selective catalytic reducing agent adding device and method | |
| CN207499951U (en) | Diesel engine post-processing system | |
| WO2016041339A1 (en) | Liquid jet metering unit and control method | |
| CN205190010U (en) | High temperature environment liquid jet device | |
| CN106468201B (en) | A kind of hot environment liquid injection apparatus | |
| CN105986866B (en) | A kind of digital fluid metering device and control method | |
| CN105332768B (en) | A kind of engine exhaust post-processing swirl nozzle | |
| CN205559028U (en) | Urea pump gas helps prevents stifled nozzle | |
| CN105587383A (en) | SCR metering module | |
| CN113482750A (en) | Urea supply injection system with double-stage injection function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |