CN105822393B - A kind of gas assisted atomization liquid meter injection apparatus - Google Patents
A kind of gas assisted atomization liquid meter injection apparatus Download PDFInfo
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- CN105822393B CN105822393B CN201510006401.2A CN201510006401A CN105822393B CN 105822393 B CN105822393 B CN 105822393B CN 201510006401 A CN201510006401 A CN 201510006401A CN 105822393 B CN105822393 B CN 105822393B
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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
Abstract
A kind of gas assisted atomization liquid meter injection apparatus, including a Gas flow-limiting hole, one spray-hole, one fluid injector, one gas-liquid mixed chamber, metering hole is located at the upstream of gas-liquid mixed chamber, and it is connected with compressed gas source, spray-hole is located at the downstream of gas-liquid mixed chamber, and lead to the exhaust pipe of engine, it is characterized by: the circulation area ratio of the metering hole and the spray-hole, less than 1, gas reaches critical state in metering hole, so that the pressure opposite engine exhaust pipe in mixing chamber keeps stablizing.
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, the regeneration spraying system and their control technology of diesel particulate capture filter (DPF).
Background technique
Under current severe environmental problem test, by the vehicle of power of internal combustion engine need that discharge post-treatment system is installed
In the hope of meeting the emission request being increasingly stringenter.For example, be currently used primarily in the pollutants such as NOx in diesel motor exhaust into
The SCR(Selective Catalytic Reduction of row catalytic treatment) technology and diesel particulate is captured
(DPF) regenerated technology etc..
SCR technology need by the aqueous solution of urea of such as 32.5% weight concentration (also cry 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, it is therefore desirable to the higher SCR metered injection of precision
Device, and preferable injection, atomizing effect.
Because of the problems such as aqueous solution of urea freezes and crystallizes, existing SCR technology is difficult to be added in absolutely not auxiliary
It is worked normally under any weather conditions in hot situation.Since the existing device for providing injection power source is excessively huge or it
Its reason causes system unit to be difficult in integrated implantation DEF fluid reservoir, and the high pressure gas and deicing device for often needing to assist, this makes
The system of obtaining is more complicated and huge, and cost also remains high.Source of high pressure air and engine back pressure fluctuation etc. can be brought
The unstability of liquid spray atomizing is easy to spray system itself and be atomized to impact.Therefore it is complicated to solve system structure
It is all the pressing issues of reality with the problems such as auxiliary gas source.
In the equipment using diesel engine as power device, another nuisance for influencing human health is diesel engine row
Aerated particle object.These small particulate matters are captured with ceramics or metallic filter (DPF), then are accumulated to one in these particulate matters
Particulate matter is got rid of after determining degree, this technology is known as diesel particulate object and captures regeneration techniques.Commonly (DPF) regeneration techniques
It is to generate heat to improve delivery temperature, so that the particulate matter for trapping DPF is quickly burnt by spraying fuel oil oxidation in exhaust
The method fallen.
The diesel oil penetrating exhaust pipe of engine is used to improve the temperature of exhaust pipe, on the one hand can be used for the regeneration of DPF, separately
On the one hand it can be used for preheating exhaust gas post-treatment device, such as SCR catalyst, these may be collectively referred to as engine exhaust heat management.
It is properly termed as " N+1 " nozzle in the nozzle of exhaust pipe inspection diesel oil, N is the number of cylinders of engine.
For dpf regeneration system, on the one hand because the temperature of exhaust wall is relatively high, it is easy the long-term normal work to nozzle
It causes damages, such as carbon deposit or structure change etc.；On the other hand, engine is improved in order to aoxidize or burn by fuel oil
The temperature of exhaust pipe is needed fuel atomization into particle as small as possible.For solving the above problems, there are costs for the prior art
Height, the factors such as installation inconvenience, needs further to improve.
Summary of the invention
The present invention in view of the above-mentioned problems, be designed to provide that a kind of accuracy of spray is high, and atomizing effect is good and at low cost
Liquid meter injection apparatus.
To achieve the above object, the present invention takes following technical scheme: a kind of gas assisted atomization liquid meter injection dress
It sets, including a Gas flow-limiting hole, a spray-hole, a fluid injector, a gas-liquid mixed chamber, metering hole is mixed positioned at gas-liquid
The upstream of chamber is closed, and is connected with compressed gas source, spray-hole is located at the downstream of gas-liquid mixed chamber, and leads to the exhaust pipe of engine,
It is characterized by: the circulation area ratio of the metering hole and the spray-hole, less than 1, gas reaches critical shape in metering hole
State, so that the pressure opposite engine exhaust pipe in mixing chamber keeps stablizing.
The fluid injector provides liquid injection pressure by liquid jet pump, and measures to injection liquid.The liquid
Body jet pump can be a pulse pump, and the pulse pump provides injection liquid for fluid injector, and fluid injector is by working fluid
Spray into gas-liquid mixed chamber.
The pulse pump includes a calutron and an assembly of the plunger pump.The calutron include coil, magnetic yoke,
Magnetic gap and armature, wherein magnetic yoke and armature are made of permeability magnetic material, and magnetic gap is made of non-magnet material, the assembly of the plunger pump packet
Plunger and sleeve are included, plunger and sleeve cooperatively form force feed volume, and force feed volume connection liquid feed valve and liquid valve, liquid enter arteries and veins
After punching pump, a part enters force feed volume from liquid feed valve, after forming high-pressure solution, exports from liquid valve, into tapping channel.
It for above-mentioned pulse pump, can be that sleeve is campaign-styled, be also possible to plunger motion formula.Pulse pump is by controller
Driving, provides injection solution for the fluid injector.
Aforesaid liquid nozzle includes a spout, and fluid injector is installed on the tapping channel of pulse pump, can be by pressure
The ball valve nozzle of unlatching, or by the poppet nozzle ball valve of opened by pressure, or by the electromagnetism of electromagnetism power drive
Valve nozzle.High-pressure work liquid in tapping channel enters nozzle, and nozzle group valve sprays after opening from spout.
The compressed gas source can be the brake air pump of vehicle, be also possible to vehicle intake booster.
The gas-liquid mixed chamber is arranged in the output end of pulse pump, communicates with fluid injector and gas metering hole, nozzle it
Spout is located in mixing chamber, and metering hole is located at the upstream of gas mixing chamber, from gas source enter gas by Gas flow-limiting hole to
Up to mixing chamber, fluid injector is sprayed along airflow direction, forms two mixed flows of gas-liquid with gas.
Device of the present invention includes the injector for being located at the downstream of mixing chamber, and injector is installed on engine exhaust
On pipe.The injector includes the spray-hole for leading to the exhaust pipe of engine, the Gas flow-limiting hole and spray-hole and his like
Lead to area ratio less than 1, gas reaches critical state in metering hole, so that the pressure opposite engine exhaust pipe in mixing chamber is protected
It holds basicly stable, the injection measuring accuracy of fluid injector is made to be guaranteed.Meanwhile with the injection liquid of gas mixing because having steady
The effect of the auxiliary gas of constant-pressure, and sprayed with better atomizing effect from spray-hole.
Above-mentioned injector can be swirl nozzle, or throttle valve type nozzle.
The liquid meter injection apparatus can be applied to the SCR system of exhaust after treatment system, including a urea tank, institute
Pulse pump is stated to be arranged in urea tank.
The liquid meter injection apparatus can be applied to the DPF system of exhaust after treatment system, including a fuel reserve tank, institute
State the bottom that pulse pump is installed on fuel reserve tank.
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 the structural schematic diagram of the embodiment one of gas assisted atomization liquid meter injection apparatus provided by the invention.
Fig. 2 is the structural schematic diagram of the embodiment two of gas assisted atomization liquid meter injection apparatus provided by the invention.
Fig. 3 is the schematic diagram that gas assisted atomization liquid meter injection apparatus provided by the invention is used for SCR system.
Fig. 4 is the schematic diagram that gas assisted atomization liquid meter injection apparatus provided by the invention is used for dpf regeneration system.
Specific embodiment
As shown in Figure 1, being the schematic structural diagram of the first embodiment of liquid meter injection apparatus provided by the invention, including arteries and veins
Punching pump 1, mixing arrangement 2, fluid injector 3a, compressed gas source 27, injector 4, controller 5, mixed flow delivery pipe 32；Mixing arrangement
2 include Gas flow-limiting hole 26, gas-liquid mixed chamber 24；The work of liquid meter injection apparatus described in 5 drive control of controller.
The pulse pump 1 is a sleeve-plunger type pulse pump configuration, including electromagnetic actuator device 14, assembly of the plunger pump
10.Wherein, assembly of the plunger pump 10 include sleeve 20, plunger 19, return spring 17, liquid feed valve 11 and liquid valve 16, sleeve 20 with
19 close fit of plunger, forms force feed volume 12, and return spring 17 acts on sleeve 20.Calutron 14 includes coil
13, magnetic yoke 15, magnetic gap 18 and armature 21.The armature 21 and sleeve 20 can be integrated design, and armature 21 wraps sleeve 20
It is trapped among wherein, the magnetic yoke 15 is made of with armature 21 permeability magnetic material, and the front end face of armature 21 is located near magnetic gap 18.Pulse pump
1 controller 4 provides working signal, and after coil 13 is powered, armature 21 under the driving of calutron 14, moves ahead together with sleeve 20
Movement causes force feed volume 12 to reduce, and the liquid in force feed volume 12 is squeezed rear pressure rise, and liquid valve 16 is caused to be opened,
It is sprayed with the working solution of High voltage output by nozzle 2, after coil 13 is powered, under the action of return spring 17, sleeve 20
Start returning movement, during return, liquid feed valve 11 is opened, and new liquid enters force feed space, prepares next course of work.
Aforesaid liquid nozzle 3a is a ball valve nozzle by opened by pressure, including a spout 23, fluid injector 3a
Arrival end is installed on the tapping channel 27 of pulse pump 1, and ejection end stretches to the gas-liquid mixed chamber 24, the flow of fluid injector 3a by
The size of spout 23 limits.
The gas-liquid mixed chamber 24 is arranged in the output end of pulse pump 1, communicates with fluid injector 3a and gas metering hole 26.
The spout 23 of nozzle 3a is located in gas-liquid mixed chamber 24, and metering hole 26 is located at the upstream of gas mixing chamber 24, enters from gas source 27
Gas by Gas flow-limiting hole 26 reach mixing chamber 24, fluid injector 3a along airflow direction spray, in the downstream of mixing chamber 24
Gas-liquid mixed two phase flow 25 is formed, into mixed flow delivery pipe 32, reaches injector 4.
The injector 4 leads to exhaust pipe of engine (not shown).Injector 4 includes a spray-hole 22, gas
The circulation area ratio of metering hole 26 and spray-hole 22 is less than 1, and gas reaches critical state in metering hole, so that in mixing chamber 24
Pressure opposite engine exhaust pipe keep it is basicly stable.Mixed flow 25 is ejected into engine row from the spray-hole 22 of injector 4
Tracheae.
Fig. 2 show the structural schematic diagram of the embodiment two of liquid meter injection apparatus provided by the invention.With the present invention
One of provided liquid meter injection apparatus first structure diagram difference is: the pulse pump 1a is that plunger-is telescopic
Pump configuration.Plunger 19 is connect with armature 21 by connector or welding manner, and return spring 17 acts on plunger 19.Plunger
19 move back and forth under the driving of calutron 14 and return spring 17, and the alternating of the size of force feed volume 12 is caused to change, and produce
Raw injection fluid.The substantially cylindrical body of armature 21, armature 21 include the through-hole 21a of perforation both ends of the surface.The through-hole 21a can
With with certain taper, oriented flow of the hole with taper to feeding liquid under pressure Directional Extension, for realizing liquid in inner space
It is dynamic, with the stability of its work of cooling pulse pump 1 and raising.The two of the difference of this structure and schematic structural diagram of the first embodiment exist
In: the fluid injector 3b is a poppet by opened by pressure, including an injection liquid inlet channel 301, a nozzle group valve
302, the nozzle group valve 302 includes a valve seat 304, a valve member 303 and a valve spring 305, valve seat 304 and valve member 303 it
Surface is adjacent to by the effect of valve spring 305, size and lift limit of the injection flow by poppet valve member 303.
It is illustrated in figure 3 gas assisted atomization liquid meter injection apparatus provided by the invention and applies and show with SCR system
Example structure chart, including a urea tank 6, an end cap 7, a pulse pump 1, a gas-liquid mixed chamber 24, a gas source 27, one
A fluid injector 3b, a gas-guide tube 31, a mixed flow delivery pipe 32, a controller 5, an injector 4, one has
The exhaust pipe 34 of SCR catalytic converter 35 has been sequentially arranged temperature sensor 36 and NOx or ammonia along 33 direction of exhaust stream
Gas sensor 37 is located at catalyst upstream and downstream.
The pulse pump 1 is arranged in the inside of urea tank 6, and the end cap 7 is installed on 1 upper end of urea tank, and end cap 7 includes each
Route and tube outlet.Controller 5 is installed on the end cap 7, and pulse pump 1 is driven by controller 5.
The gas-guide tube 31 includes a hook 40, a locking nut 41.The locking nut 41 passes through 40 sets of hook
Firmly, and with the liquid inlet channel 26a of mixing chamber 24 it is threadedly coupled.The signal wire 42 of pulse pump 1 can be drawn by gas-guide tube 31.
The gas source 27 is the gas source for being higher than atmospheric pressure, such as the brake air pump or engine booster of vehicle
Air (not shown), gas enter gas-guide tube 31 by air filter 39 and solenoid valve control switch 38, limit through gas
Mixing chamber 24 is entered with stable state after discharge orifice 26.The gas-liquid mixed chamber 24 is arranged in the output end of pulse pump 1, fluid injector
The downstream of 3b.Mixed flow, which is crossed high-pressure delivery pipe 32 and sent to the injector 4 being installed on exhaust pipe 34, to be sprayed.
The course of work of above-mentioned SCR system application examples is as follows.
System initial state, working solution enters pulse pump 1 by filter 43 in urea tank 6.Controller 5 is according to starting
Machine operating condition and exhaust gas temperature sensor 36, NOx or ammonia gas sensor 37, the signal of each sensor etc. in urea tank 6, meter
Urea flow quantity needed for calculating, then judges whether urea solution spraying system can work normally, if it can, issuing drive
Dynamic signal.After pulse pump 1 receives the working signal that lead 42 transmits, by solution pump in the pump housing to fluid injector 3b, and pass through spray
The spout 23b of mouth 3b sprays.Meanwhile controller 5 drives solenoid-operated switch 38 to open, gas is entered by gas-guide tube 31, is passed through
Gas-liquid mixed chamber 24 is reached after metering hole 26 and air intake duct 26a.Gas exports extremely after mixing with injection liquid through blending transportation pipe 32
Injector 4.The form that urea liquid is atomized by injector 4 is injected into exhaust pipe 34 from spray-hole 22, and in engine
Pyrolysis is ammonia under the action of exhaust high temperature, is uniformly mixed with engine exhaust 33 and enters SCR catalytic converter 35, therein
NOx will be harmless N by efficient-decomposition2And H2O achievees the purpose that cleaning of off-gas.Temperature sensor 36 and NO sensor 37 will
Perhaps ammonia concentration feeds back to controller or engine control for real-time measurement delivery temperature and the NOx concentration in converter downstream
Device (not shown), for determining the real-time amendment to the working solution of injection.
Further, after last handling process, gas can be molten for cleaning remaining urea in pipeline with time-delay closing
Liquid, to prevent pipeline from freezing or urea crystallization blocking pipeline.
Above-mentioned SCR system is not present because all pipelines after shutting down outside urea tank 6 all exist without liquid
The problem of urea crystals precipitation or ice blockage pipeline, outside does not need any heating deicing device, and inside urea tank 6
It is only necessary to when urea solution freezes to pulse pump 1 and its around carry out ice-melt, such as it is logical by the coil to pulse pump 1
Electricity generates heat and carrys out ice-melt.Therefore, the present invention keeps the result of SCR system greatly simplified, and cost is greatly lowered, and system reliability obtains
To raising.
Fig. 4 is gas assisted atomization liquid meter injection apparatus provided by the invention showing for dpf regeneration apparatus system
Example structure chart, including fuel reserve tank 8, pulse pump 1, gas source 27a, gas-liquid mixed chamber 24, fluid injector 3c, gas-guide tube 31, mixed flow
Delivery pipe 32, controller 5, injector 4, spark plug 45, the exhaust pipe of engine 34, flow deflector 52, and it is arranged in exhaust pipe 34
On temperature sensor 51 and 48, differential pressure pickup 46 and lambda sensor 47.
The pulse pump 1 is fixed on the bottom of fuel reserve tank 8 by bolt 53, and is sealed by gasket 54.So that oil storage
Fuel oil in case 8 can be entered in pulse pump 1 by gravity forms normal fuel feeding.
The controller 5 works for driven pulse pump 1, stores and handles each sensor signal.On the exhaust pipe 34
It can connect an oxidized form catalyst DOC 50, Huo Zhe before diesel particulate catcher (DPF) 49, DPF 49 is installed
Direct noble metal-coating catalyst on catcher DPF 49.Spark plug 45 is installed on after injector 4, is located at oxidized form catalyst
49 upstream DOC 50 and DPF, when injector 4 sprays mixed atomizing, spark plug 45 is lighted a fire in due course, is lighted regeneration fuel oil and is sprayed,
So that delivery temperature is increased to 600 DEG C or so and enter back into DPF 49, thus be collected into the DPF 49 that ignites with soot be mainly at
The particulate matter of part reaches ideal regenerated effect.
Gas source described in the application example be engine charge pressurized air, from booster 125 compressor 121 with
And the downstream of intercooler 120.Compressor 121 is driven by charging turbine 122, and charging turbine 122 is by from manifold
The high pressure gas 33a of (not shown) works, and the outflow exhaust gas 33 of charging turbine 122 enters the exhaust pipe of engine 34.Pressurization
The inlet manifold (not shown) of air most supply engines after intercooler, a part of 27a is as regeneration combustion
Oil spurts is atomized auxiliary air and enters mixing arrangement 2 by gas-guide tube 31, is entered back into mixing arrangement 2 by 26 current limliting of metering hole
Mixing chamber 24.The fuel oil sprayed from nozzle 3c is mixed in mixing chamber 24 with the air imported, spurts into exhaust pipe from injector 4
In 34.Mixed flow not only increases the atomizing effect to injection fuel oil, and the air of importing also provides for the full combustion of fuel oil
Oxygen, and it is helpful for the cooling injector 4 on exhaust pipe 34.The injector 4 is normally opened hole type nozzle or rotation
Flow nozzle is equipped with one and half flow deflectors 52 for encircling injector 4 in the upstream of its installation site, and flow deflector 52 may include and be vented
Some through-holes of levelling row.Change spray direction by the higher flow deflector 52 of temperature and generates fuel-steam, meanwhile, flow deflector
52 also have choked flow effect, keep exhaust stream 33 relatively stable in region downstream, and the spraying or fuel-steam that generates by spraying can be with
The region of discharge of spark plug 45 is reached in the form of effective, and forms stable burned flame.
The fuel reserve tank 8, can be the auxiliary fuel tank for DPF system, be located at engine high pressure injection on pulse pump 1
The oil return (preferably taking concatenated form) of system enters auxiliary fuel tank 8 by oil inlet 56, is then returned to again by oil return opening 55
The main fuel tank of engine.One of filtration system is at least arranged between 1 from engine main fuel tank to pulse pump, if fuel oil from
The low pressure oil return of engine high pressure spraying system can then not need separately to add filter.It can be around the oil inlet of pulse pump
Arrange a fuel oil filter 9.The mountable exhaust gas bubble pipe 57 in 9 upper end of filter, when working for pulse pump 1 to be discharged
The bubble and fuel-steam of generation.
The course of work of the dpf regeneration device of above-described embodiment is as follows.
Soot from engine is filtered and gradually accumulated wherein by DPF 49, with the increase of soot accumulation amount, DPF
49 front and back pressure difference △ P incrementally increase, when controller 5 by differential pressure pickup 46 detect △ P be greater than particular value when (or
Person will influence the power output of engine) or controller 5 according to the trapping amount of soot of model prediction reach certain threshold value it
When, if other conditions also meet regeneration DPF condition, 5 driven pulse pump 1 of controller by nozzle 3c spray fuel oil, with into
The compressed air mixing entered, is sent to injector 4 by blending transportation pipe 32, from the spray-hole 22 of injector 4 to engine exhaust
Jet atomization fuel oil in pipe 34.Meanwhile the control of controller 5 driving spark plug 45 igniting is to increase row's temperature.Temperature sensor (48,
51) real-time capture delivery temperature, when temperature is higher than certain value, spark plug stops working, in case catcher 49 overheats scaling loss.Pressure
Gap sensor 46 continues to test the pressure difference △ P of 49 front and back DPF, when △ P is less than a certain particular value, it is believed that regeneration is completed, and is stopped
Regenerate oil spout and igniting.
Liquid meter injection apparatus provided by the invention and other further embodiments based on spirit of the invention
Within the scope of the category present invention is disclosed and is protected.
Claims (8)
1. a kind of gas assisted atomization liquid meter injection apparatus, including a Gas flow-limiting hole, a spray-hole, a liquid
Nozzle, a gas-liquid mixed chamber, Gas flow-limiting hole are located at the upstream of gas-liquid mixed chamber, and are connected with compressed gas source, spray-hole
Positioned at the downstream of gas-liquid mixed chamber, and lead to the exhaust pipe of engine, it is characterised in that: the Gas flow-limiting hole and the spray-hole
Circulation area ratio less than 1, gas reaches critical state in the Gas flow-limiting hole, sends out so that the pressure in mixing chamber is opposite
Motivation exhaust pipe keeps stablizing；
It further include injector, the spray-hole is located in the injector；The gas-liquid mixed chamber is connected by mixed flow delivery pipe
Connect the injector；
The fluid injector is a ball valve or poppet by opened by pressure；
It further include a pulse pump, the pulse pump provides injection liquid for fluid injector, and fluid injector sprays into working fluid
Gas-liquid mixed chamber；
The fluid injector is sprayed along airflow direction.
2. gas assisted atomization liquid meter injection apparatus as described in claim 1, it is characterised in that: the compressed gas source is
The brake air pump of vehicle.
3. gas assisted atomization liquid meter injection apparatus as described in claim 1, it is characterised in that: the compressed gas source is
Vehicle intake booster.
4. gas assisted atomization liquid meter injection apparatus as claimed in claim 2 or claim 3, it is characterised in that: the gas-liquid is mixed
Close the output end that chamber is arranged in pulse pump.
5. gas assisted atomization liquid meter injection apparatus as claimed in claim 4, it is characterised in that: including a urea
Tank, the pulse pump are arranged in urea tank.
6. gas assisted atomization liquid meter injection apparatus as claimed in claim 4, it is characterised in that: including an oil storage
Case, the pulse pump are arranged in fuel reserve tank bottom.
7. a kind of engine exhaust SCR system for applying gas assisted atomization liquid meter injection apparatus as claimed in claim 5,
It is characterized in that the urea tank external pipe can be all by auxiliary gas cleaning, no risk of icing.
8. a kind of engine exhaust particulate matter mistake for applying gas assisted atomization liquid meter injection apparatus as claimed in claim 6
Filter system, it is characterised in that the auxiliary gas source is the pressurized air of engine charge.
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| CN201510006401.2A CN105822393B (en) | 2015-01-07 | 2015-01-07 | A kind of gas assisted atomization liquid meter injection apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510006401.2A CN105822393B (en) | 2015-01-07 | 2015-01-07 | A kind of gas assisted atomization liquid meter injection apparatus |
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| CN105822393B true CN105822393B (en) | 2019-08-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108620472B (en) * | 2017-03-17 | 2023-08-15 | 美盛隆制罐（惠州）有限公司 | Automatic wax spraying device and method |
| CN107159656B (en) * | 2017-07-06 | 2023-01-17 | 江苏徐工工程机械研究院有限公司 | Pipeline cleaning device and method and concrete conveying equipment |
| CN110725992A (en) * | 2019-09-30 | 2020-01-24 | 广西擎芯动力科技有限公司 | Low-power-consumption driving fuel metering valve for auxiliary injection of fuel gas of heavy oil piston engine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4465050A (en) * | 1981-05-19 | 1984-08-14 | Nippon Soken, Inc. | Device for atomizing the fuel for an internal-combustion engine |
| DE19961947A1 (en) * | 1999-12-22 | 2001-06-28 | Bosch Gmbh Robert | Apparatus, for producing reductant-air mixture, has devices for subjecting air to pressure such that it flows through air feed channel at speed of sound |
| CN103032136B (en) * | 2011-10-02 | 2015-01-21 | 苏州派格丽减排系统有限公司 | Selective catalytic reduction (SCR) system with external mixing nozzle metering structure |
| CN103174497B (en) * | 2012-08-15 | 2015-09-16 | 苏州派格丽减排系统有限公司 | Reducing agent ejection control device in SCR system |
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