CN107435570A - Diesel motor exhaust after-treatment system and fluid operating system - Google Patents
Diesel motor exhaust after-treatment system and fluid operating system Download PDFInfo
- Publication number
- CN107435570A CN107435570A CN201610352930.2A CN201610352930A CN107435570A CN 107435570 A CN107435570 A CN 107435570A CN 201610352930 A CN201610352930 A CN 201610352930A CN 107435570 A CN107435570 A CN 107435570A
- Authority
- CN
- China
- Prior art keywords
- vent gas
- gas treatment
- treatment agent
- detection device
- state detection
- 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 56
- 238000007689 inspection Methods 0.000 claims abstract description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 85
- 239000003795 chemical substances by application Substances 0.000 claims description 52
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 5
- 239000004202 carbamide Substances 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 238000002474 experimental method Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 36
- 239000007788 liquid Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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 ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
-
- 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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/05—Systems for adding substances into exhaust
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/12—Other sensor principles, e.g. using electro conductivity of substrate or radio frequency
-
- 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
-
- 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
- F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
-
- 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
- F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
- F01N2610/105—Control thereof
-
- 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
-
- 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
- F01N2610/1433—Pumps
- F01N2610/144—Control thereof
-
- 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
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
-
- 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
- F01N2610/148—Arrangement of sensors
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
A kind of diesel motor exhaust after-treatment system (1) is disclosed, including：For storing the inorganic agent case of vent gas treatment agent；For to the injector (4) of tail gas pipe inspection vent gas treatment agent；The pump (3) being connected between inorganic agent case and injector (4), it is used to pump vent gas treatment agent to injector (4)；The vent gas treatment agent pipe being connected between injector (4) and pump (3)；Suitable for the heater (7) heated to the position for being prone to vent gas treatment agent icing in diesel motor exhaust after-treatment system (1)；And the state detection device (8) of the state of the vent gas treatment agent for detecting the position；Wherein, the operation of the state control heater (7) of the vent gas treatment agent at least detected based on state detection device (8).Also disclose a kind of fluid operating system for the state that working fluid has risk of icing and needs detection operations fluid.By the status information detected, corresponding control can be given to provide more control foundations.
Description
Technical field
Being capable of detection operations stream the present invention relates to a kind of diesel motor exhaust after-treatment system and one kind
The fluid operating system of the state of body.
Background technology
Diesel engine due to good reliability, the thermal efficiency is high and the characteristics such as output torque is big and by
It is widely used in the machines such as small-sized, heavy or oversize vehicle, ship, generator and military tanks.So
And due to there is the nitrogen oxides of high level, it is necessary to by special in the tail gas of diesel engine emissions
Exhaust gas aftertreatment system can be just discharged into air after being handled tail gas, to meet increasingly
Strict environmental requirement.
In other words, in order to reduce air pollution, post-processed for the tail gas of diesel engine
It is equipped with as the standard of diesel engine.Processing for tail gas, typically now passes through selective catalysis
Restoring method is carried out, and by liquid reducing agent (being usually aqueous solution of urea) is in aerosol by injector
Shape is injected into offgas duct, and by the catalytic reduction reaction of selectivity, the pernicious gas in tail gas is become
It is discharged into after into innocuous gas in air, so as to reduce the infringement for environment.
Therefore, exhaust gas aftertreatment system generally include for store reducing agent reducing agent tank, for spraying
Penetrate the injector of reducing agent and be connected between reducing agent tank and injector be used for convey reducing agent
Transfer pipeline.
When environment temperature too low (such as less than -11 DEG C), some positions in exhaust gas aftertreatment system,
Such as icing phenomenon can occur for the liquid reducing agent of the usually aqueous solution of urea in transfer pipeline.Freeze
The conveying of reducing agent can be not only influenceed, and the accurate measurement to the reducing agent of conveying can be influenceed, seriously
When can even block transfer pipeline completely, damage is arranged on flowmeter at transfer pipeline.In order to prevent
The generation of icing phenomenon, exhaust gas aftertreatment system are typically provided with the heating around transfer pipeline arrangement at present
Device.
However, there is great difficulty in the accurate control to heater, because can not be accurate
Characterize any feedback information of reductant conditions.Carried out generally according to environment temperature and heat time rough
Control, this is obviously not accurate enough and reliable., may be to the portion of exhaust gas aftertreatment system when overheat
Part causes to damage and can produce energy dissipation.When underheat, because expansive force caused by ice can damage
Some bad parts.
Therefore, the reducing agent solution in current diesel motor exhaust after-treatment system in the urgent need to address
Freeze can not accurately, the problem of reliably carrying out.
The content of the invention
It is an object of the invention to provide a kind of diesel engine tail that can at least partly overcome disadvantages mentioned above
Gas after-treatment system and a kind of fluid operating system for the state for being capable of detection operations fluid.
According to the first aspect of the invention, there is provided a kind of diesel motor exhaust after-treatment system,
Including：For storing the inorganic agent case of vent gas treatment agent；For to tail gas pipe inspection vent gas treatment agent
Injector；The pump being connected between the inorganic agent case and injector, it is used for the eductor pump
Send vent gas treatment agent；The vent gas treatment agent pipe being connected between the injector and pump；Suitable for diesel oil
What the position for being prone to vent gas treatment agent icing in motor exhaust after-treatment system was heated adds
Thermal；And the state detection device of the state of the vent gas treatment agent for detecting the position；Its
In, the state of the vent gas treatment agent at least detected based on the state detection device controls the heating
The operation of device.
The vent gas treatment agent is reducing agent, is preferably aqueous solution of urea；And/or the state detection dress
Put and be arranged at the vent gas treatment agent pipe, for detecting the vent gas treatment agent in vent gas treatment agent pipe
State；And/or the state detection device is further configured to whether there is tail suitable for detecting the position
Gas disposal agent.
The diesel motor exhaust after-treatment system also includes controller, and the controller is used to control
It is at least one in the pump, injector and state detection device.
Be configured to acoustic type, especially ultrasonic type state detection device include at least one sound wave
Generator and at least one acoustic receiver, during work, Acoustic Wave Propagation that the sonic generator is sent
Received by the vent gas treatment agent at the position by corresponding acoustic receiver.
The state of the vent gas treatment agent is characterized by the ice content of vent gas treatment agent, by simulating in advance
Experiment determines that the ice content of vent gas treatment agent travels to corresponding acoustic receiver with sound wave from sonic generator
Functional relation between the duration that device is undergone, enabling tail gas is detected based on the functional relation
The ice content of inorganic agent.
The sonic generator and corresponding acoustic receiver are arranged to exist between them to be detected
Vent gas treatment agent or the same side for being arranged on vent gas treatment agent to be detected；And/or the sonic generator
Offset one from another with corresponding acoustic receiver on the flow direction of the vent gas treatment agent arrangement.
The ultrasonic type state detection device includes multiple supersonic generators and at least one ultrasonic wave connects
Device is received, wherein, a ultrasonic receiver is configured to send suitable for receiving multiple supersonic generators
Sound wave.
By the state for the state for setting the vent gas treatment agent that can detect the position for being prone to freeze
Detection device, diesel motor exhaust after-treatment system can be made more reliably to work, particularly can
Make diesel motor exhaust after-treatment system it is more reliable, it is more accurate, more efficiently control its heater
Operation.
According to the second aspect of the invention, there is provided a kind of working fluid has risk of icing and needed
The fluid operating system of the state of detection operations fluid, wherein, the fluid operating system includes ultrasound
Formula state detection device, the ultrasonic type state detection device include at least one supersonic generator and
At least one ultrasonic receiver, during work, the Acoustic Wave Propagation that the supersonic generator is sent passes through
Working fluid to be detected is received by corresponding ultrasonic receiver, to detect working fluid to be detected
State.
Brief description of the drawings
Below, by the way that the present invention is more fully described referring to accompanying drawing, it may be better understood the present invention's
Principle, feature and advantage.Accompanying drawing includes：
Fig. 1 is shown to be post-processed according to the diesel motor exhaust of one exemplary embodiment of the present invention
The schematic diagram of system.
Fig. 2 is shown to be shown according to the principle of the state detection device of one exemplary embodiment of the present invention
It is intended to.
Fig. 3 shows the principle of the state detection device of another exemplary embodiment according to the present invention
Schematic diagram.
Fig. 4 shows the principle of the state detection device of another exemplary embodiment according to the present invention
Schematic diagram.
Fig. 5 shows the principle of the state detection device of another exemplary embodiment according to the present invention
Schematic diagram.
Embodiment
In order that the technical problems to be solved by the invention, technical scheme and beneficial technique effect are more
Add clear, the present invention is carried out further specifically below with reference to accompanying drawing and multiple embodiments
It is bright.It should be appreciated that specific embodiment described herein is only used for explaining the present invention, rather than it is used for
Limit protection scope of the present invention.
Fig. 1 is shown to be post-processed according to the diesel motor exhaust of one exemplary embodiment of the present invention
The schematic diagram of system.
As shown in figure 1, diesel motor exhaust after-treatment system 1 includes being used to store reducing agent liquid
Reducing agent tank 2, the pump 3 for pumping reducing agent liquid, for the injection to tail gas pipe inspection reducing agent liquid
Device 4, the pipeline 5 being connected between reducing agent tank 2 and pump 3, it is connected between pump 3 and injector 4
Reducing agent pipe 6, be arranged at reducing agent pipe 6 heater 7, for detecting in reducing agent pipe 6
Reductant conditions state detection device 8 and controller 9.
Reducing agent is preferably urea.During work, pump 3 by pipeline 5, go back by the suction out of reducing agent tank 2
Former agent liquid, reducing agent liquid is then transported to by injector 4 by reducing agent pipe 6 and sprayed.
Heater 7 is preferably set around the periphery of reducing agent pipe 6, for too low in environment temperature
Shi Jiare reducing agents pipe 6, to prevent the reducing agent in reducing agent pipe 6 from freezing.
State detection device 8 is preferably provided at reducing agent pipe 6, to judge going back in reducing agent pipe 6
Former agent is liquid, icing condition or admixture.
Controller 9 is used to control the part in diesel motor exhaust after-treatment system 1, these parts
Can be one or more of pump 3, injector 4, heater 7 and state detection device 8.Control
Device 9 processed receives working condition or the measurement of corresponding component by communication line (in figure shown in broken lines)
Data, to monitor or control the work of diesel motor exhaust after-treatment system 1.The controller 9
Can be the electronic control unit (ECU) of diesel engine or the part being separately provided.
During work, controller 9 judges that the reducing agent in reducing agent pipe 6 is by state detection device 8
Liquid, icing condition (solid-state) or admixture.According to the state judged, controller 9 is right
Heater 7 is accordingly controlled.For example, when state detection device 8 is judged in reducing agent pipe 6
When reducing agent is liquid, illustrate that reductant conditions are normal, there is no icing phenomenon, can now turn off
Heater 7 makes heater 7 be worked with lowest power.When state detection device 8 judges to reduce
When reducing agent in agent pipe 6 is solid-state, illustrate that icing phenomenon occurs in reducing agent, now need unlatching to add
Thermal 7 simultaneously preferably makes heater 7 be worked with peak power.When state detection device 8 judges also
When reducing agent in former agent pipe 6 is admixture, illustrate that part icing phenomenon occurs in reducing agent, this
When also to open heater 7 and preferably make heater 7 with suitable power work.Certainly, control
The concrete mode of refrigerating/heating apparatus is not limited thereto.
According to a preferred embodiment of the present invention, state detection device 8 is configured to acoustic type
State detection device, i.e. the reductant conditions in reducing agent pipe 6 are determined based on acoustic sounding.At this
In the case of kind, as shown in Fig. 2 state detection device 8 is including at least one sonic generator 10 and extremely
A few acoustic receiver 11, the sound wave for sending sonic generator 10 are advanced through reducing agent pipe 6
Received after interior reducing agent by acoustic receiver 11.By measuring speed of the sound wave by reducing agent medium
Degree, it may be determined that the density of reducing agent medium, and then may determine that the reducing agent shape in reducing agent pipe 6
State.
Specifically, SVEL C is Media density ρ and bulk modulus K function, specifically
Formula is as follows：
For example, when sound wave passes through water, the velocity of sound is about 1.48m/s.When sound wave passes through ice, the velocity of sound is about
For 3.14m/s.
With continued reference to Fig. 2, in one preferred embodiment, state detection device 8 includes a sound
Wave producer 10 and an acoustic receiver 11, they are located at the opposite side of reducing agent pipe 6, and it
Between there is fixed range.During work, sonic generator 10 at a time sends sound wave, acoustic receiver
Device 11 receives sound wave after postponing a period of time, according to this time and sonic generator 10 and sound
The distance between ripple receiver 11 can determine spread speed of the sound wave in reducing agent medium, Jin Erke
To determine reducing agent Media density.
Media density is relevant with the content of the ice in medium, therefore can determine medium by Media density
The content of interior ice, i.e. the content of the ice in the reducing agent in reducing agent pipe 6 can be determined.In order to
The content of the ice in reducing agent is conveniently derived, can be established beforehand through simulated experiment in reducing agent
Between the duration that the content and sound wave of ice travel to that acoustic receiver 11 is undergone from sonic generator 10
Functional relation, the functional relation can be represented by matched curve.As long as that is, measure
Sound wave travels to the duration that acoustic receiver 11 undergone from sonic generator 10, you can draws reduction
The content of ice in agent.The content of ice in reducing agent can characterize the reducing agent shape in reducing agent pipe 6
State.When the content of ice is 0%, represents that the reducing agent in reducing agent pipe 6 is entirely liquid, do not tie
Ice phenomenon.When the content of ice is 100%, represent that the reducing agent in reducing agent pipe 6 freezes completely.Between
When between 0%-100%, represent that the reducing agent part in reducing agent pipe 6 freezes, in solid-liquid mixing shape
State.Obviously, it can also judge whether contain reducing agent in reducing agent pipe 6 by state detection device 8
Medium, i.e. whether reducing agent pipe 6 is empty.
Then, diesel motor exhaust after-treatment system 1 according to the reductant conditions detected to heating
Device 7 is controlled accordingly, to make heater 7 according to being actually needed work, so as to
Avoid damaging part and energy can be saved.
As shown in Fig. 2 sonic generator 10 and acoustic receiver 11 are preferably in the axle of reducing agent pipe 6
Offset one from another arrangement upwards, and the distance so as to make the sound wave traveling that sonic generator 10 is sent longer arrives
Up to acoustic receiver 11, that is, the reducing agent medium of more majority of its axial length is spanned, this obviously can improve spy
The accuracy of survey.Certainly, for those skilled in the art, regardless of the harmony of sonic generator 10
How ripple receiver 11 is arranged, as long as the sound wave that sonic generator 10 is sent is traveling to acoustic receiver
The reducing agent that can pass through during device 11 in reducing agent pipe 6.
In addition, though a sonic generator 10 and an acoustic receiver 11 are shown in Fig. 2, but
This is only exemplary.For example, it may also set up multipair sonic generator 10 and acoustic receiver 11.Figure
3 show the embodiment including two pairs of sonic generators 10 and acoustic receiver 11, now pass through two
Common detection to sonic generator 10 and acoustic receiver 11, can more accurately judge reducing agent
Reductant conditions in pipe 6.Even two sonic generators 10 and an acoustic receiver can be set
11, as shown in figure 4, now two timesharing of sonic generator 10 send sound wave, by acoustic receiver
11。
Although the sonic generator 10 and acoustic receiver 11 that are shown in Fig. 2-4 are in reducing agent pipe 6
Opposite side, but this is only exemplary.For those skilled in the art, it might even be possible to
Sonic generator 10 and acoustic receiver 11 are arranged on to the same side of reducing agent pipe 6.Such as Fig. 5 institutes
Show, then the Acoustic Wave Propagation that sonic generator 10 is sent is gone back by the reducing agent in reducing agent pipe 6
The relative lateral reflection of former agent pipe 6, to form the sound wave for traveling to acoustic receiver 11.
The state detection device of acoustic type described above is preferably based on the state detection dress of ultrasonic wave
Put, i.e. sonic generator 10 and acoustic receiver 11 respectively supersonic generator and ultrasonic wave connect
Receive device.
In addition, for those skilled in the art, state detection device is not limited to the above and retouched
The acoustic type stated, but can be any suitable type, as long as can be filled by the state detection
Put the reductant conditions detected exactly in reducing agent pipe.
Although the detection of the reductant conditions in reducing agent pipe 6 is described above, for this area
Technical staff for, other position, such as reducing agents of diesel motor exhaust after-treatment system 1
Icing phenomenon may also occur in case 2, pump 3, pipeline 5 etc., and therefore, state detection device can also be applied
In these positions.
The basic thought of the present invention is can to detect diesel motor exhaust after-treatment system by setting
The reductant conditions for being easy to icing position state detection device, after diesel motor exhaust being made
Processing system more reliably works, can particularly make diesel motor exhaust after-treatment system it is more reliable,
Operation that is more accurate, more efficiently controlling its heater.
Although answering for state detection device is described by taking diesel motor exhaust after-treatment system as an example above
With it shall be apparent to one skilled in the art that the state detection device can also be applied in low temperature
In other any systems that fluid freeze risk be present.
Although only certain exemplary embodiments of this invention is described in detail here, they are just for the sake of explanation
Purpose and provide, and it is not considered that they are construed as limiting to the scope of the present invention.This is not being departed from
It is various to replace, change and transform and be contemplated out on the premise of spirit and scope.
Claims (10)
1. a kind of diesel motor exhaust after-treatment system (1), including：
For storing the inorganic agent case of vent gas treatment agent；
For to the injector (4) of tail gas pipe inspection vent gas treatment agent；
The pump (3) being connected between the inorganic agent case and injector (4), it is used for the injection
Device (4) pumps vent gas treatment agent；
The vent gas treatment agent pipe being connected between the injector (4) and pump (3)；
Suitable for being frozen to the vent gas treatment agent that is prone in diesel motor exhaust after-treatment system (1)
The heater (7) that is heated of position；And
State detection device (8) for the state of the vent gas treatment agent that detects the position；
Wherein, the state control of the vent gas treatment agent at least detected based on the state detection device (8)
Make the operation of the heater (7).
2. diesel motor exhaust after-treatment system (1) as claimed in claim 1, it is characterised in that
The vent gas treatment agent is reducing agent；And/or
The state detection device (8) is configured to the state detection device of acoustic type；And/or
The state detection device (8) is arranged at the vent gas treatment agent pipe, for detecting at tail gas
Manage the state of the vent gas treatment agent in agent pipe；And/or
The state detection device (8) is further configured to whether there is tail gas suitable for detecting the position
Inorganic agent.
3. diesel motor exhaust after-treatment system (1) as claimed in claim 1 or 2, its feature
It is,
The vent gas treatment agent is aqueous solution of urea；And/or
The diesel motor exhaust after-treatment system (1) also includes controller (9), the controller
It is at least one in the pump (3), injector (4) and state detection device (8) for controlling.
4. the diesel motor exhaust after-treatment system (1) as described in any in foregoing Claims, its
It is characterised by,
Being configured to the state detection device (8) of acoustic type includes at least one sonic generator
With at least one acoustic receiver, during work, the Acoustic Wave Propagation that the sonic generator is sent passes through institute
The vent gas treatment agent for stating position is received by corresponding acoustic receiver.
5. diesel motor exhaust after-treatment system (1) as claimed in claim 4, it is characterised in that
The state detection device (8) is configurable to include at least one sonic generator and at least one
The ultrasonic type state detection device of acoustic receiver.
6. diesel motor exhaust after-treatment system (1) as claimed in claim 5, it is characterised in that
The state of the vent gas treatment agent is characterized by the ice content of vent gas treatment agent, by simulating in advance
Experiment determines that the ice content of vent gas treatment agent travels to corresponding ultrasonic wave with sound wave from supersonic generator
Functional relation between the duration that receiver is undergone, enabling detected based on the functional relation
The ice content of vent gas treatment agent.
7. the diesel motor exhaust after-treatment system (1) as described in claim 5 or 6, its feature
It is,
The supersonic generator and corresponding ultrasonic receiver, which are arranged to exist between them, to be waited to visit
The vent gas treatment agent of survey；And/or
The supersonic generator and corresponding ultrasonic receiver are in the flowing side of the vent gas treatment agent
Offset one from another arrangement upwards.
8. diesel motor exhaust after-treatment system (1) as claimed in claim 7, it is characterised in that
The ultrasonic type state detection device includes multiple supersonic generators and at least one ultrasonic wave connects
Device is received, wherein, a ultrasonic receiver is configured to send suitable for receiving multiple supersonic generators
Sound wave.
9. the diesel motor exhaust after-treatment system (1) as described in claim 5 or 6, its feature
It is,
The supersonic generator and corresponding ultrasonic receiver are arranged on vent gas treatment agent to be detected
The same side.
A kind of 10. fluid work for the state that working fluid has risk of icing and needs detection operations fluid
Make system, it is characterised in that the fluid operating system includes ultrasonic type state detection device, described
Ultrasonic type state detection device includes at least one supersonic generator and at least one ultrasonic wave receives
Device, during work, the Acoustic Wave Propagation that the supersonic generator is sent passes through working fluid quilt to be detected
Corresponding ultrasonic receiver receives, to detect the state of working fluid to be detected.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610352930.2A CN107435570B (en) | 2016-05-25 | 2016-05-25 | Diesel engine tail gas aftertreatment system and fluid working system |
| DE102017208517.7A DE102017208517A1 (en) | 2016-05-25 | 2017-05-19 | Exhaust after-treatment system for diesel engine and fluid operating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610352930.2A CN107435570B (en) | 2016-05-25 | 2016-05-25 | Diesel engine tail gas aftertreatment system and fluid working system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107435570A true CN107435570A (en) | 2017-12-05 |
| CN107435570B CN107435570B (en) | 2021-07-27 |
Family
ID=60269113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610352930.2A Active CN107435570B (en) | 2016-05-25 | 2016-05-25 | Diesel engine tail gas aftertreatment system and fluid working system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107435570B (en) |
| DE (1) | DE102017208517A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469403A (en) * | 2019-09-20 | 2019-11-19 | 东风汽车集团有限公司 | Gasoline engine grain catcher pressure difference pipeline icing delayed diagnosis method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002527660A (en) * | 1998-10-13 | 2002-08-27 | クリーン ディーゼル テクノロジーズ インコーポレーテッド | Mitigation of NOx emissions from engines by temperature-controlled urea injection for selective catalytic mitigation |
| US20100064668A1 (en) * | 2007-04-03 | 2010-03-18 | Robert Bosch Gmbh | Method for heating a reducing agent metering valve in an scr system for exhaust gas after-treatment in an internal combustion engine |
| US20100242439A1 (en) * | 2007-10-19 | 2010-09-30 | Wataru Domon | Control unit and control method for reductant supply device |
| CN102057140A (en) * | 2008-06-11 | 2011-05-11 | 罗伯特·博世有限公司 | Method for the aftertreatment of the exhaust gas of an internal combustion engine |
| WO2012022721A1 (en) * | 2010-08-20 | 2012-02-23 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Urea container comprising ultrasound sensor |
| US20130074590A1 (en) * | 2009-11-26 | 2013-03-28 | Continental Automotive Gmbh | Method For Determining The State Of A Reducing Agent In A Reducing Agent Tank |
| CN103547919A (en) * | 2011-05-26 | 2014-01-29 | 大陆汽车有限责任公司 | Method and device for operating an SCR system |
| US20140366512A1 (en) * | 2012-03-02 | 2014-12-18 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Conveying unit for a liquid additive for exhaust gas after-treatment, tank for storing liquid additive, motor vehicle having the conveying unit and method for determining a liquid additive quantity in a tank |
-
2016
- 2016-05-25 CN CN201610352930.2A patent/CN107435570B/en active Active
-
2017
- 2017-05-19 DE DE102017208517.7A patent/DE102017208517A1/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002527660A (en) * | 1998-10-13 | 2002-08-27 | クリーン ディーゼル テクノロジーズ インコーポレーテッド | Mitigation of NOx emissions from engines by temperature-controlled urea injection for selective catalytic mitigation |
| US20100064668A1 (en) * | 2007-04-03 | 2010-03-18 | Robert Bosch Gmbh | Method for heating a reducing agent metering valve in an scr system for exhaust gas after-treatment in an internal combustion engine |
| US20100242439A1 (en) * | 2007-10-19 | 2010-09-30 | Wataru Domon | Control unit and control method for reductant supply device |
| CN102057140A (en) * | 2008-06-11 | 2011-05-11 | 罗伯特·博世有限公司 | Method for the aftertreatment of the exhaust gas of an internal combustion engine |
| US20130074590A1 (en) * | 2009-11-26 | 2013-03-28 | Continental Automotive Gmbh | Method For Determining The State Of A Reducing Agent In A Reducing Agent Tank |
| WO2012022721A1 (en) * | 2010-08-20 | 2012-02-23 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Urea container comprising ultrasound sensor |
| CN103547919A (en) * | 2011-05-26 | 2014-01-29 | 大陆汽车有限责任公司 | Method and device for operating an SCR system |
| US20140366512A1 (en) * | 2012-03-02 | 2014-12-18 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Conveying unit for a liquid additive for exhaust gas after-treatment, tank for storing liquid additive, motor vehicle having the conveying unit and method for determining a liquid additive quantity in a tank |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469403A (en) * | 2019-09-20 | 2019-11-19 | 东风汽车集团有限公司 | Gasoline engine grain catcher pressure difference pipeline icing delayed diagnosis method |
| CN110469403B (en) * | 2019-09-20 | 2021-08-13 | 东风汽车集团有限公司 | Delay diagnosis method for icing of gasoline engine particle catcher differential pressure pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102017208517A1 (en) | 2017-11-30 |
| CN107435570B (en) | 2021-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109899137B (en) | Control method and device for removing urea crystals by SCR system | |
| US9556774B2 (en) | Conveying unit for a liquid additive for exhaust gas after-treatment, tank for storing liquid additive, motor vehicle having the conveying unit and method for determining a liquid additive quantity in a tank | |
| US10301997B2 (en) | Method for checking a temperature sensor in an SCR exhaust gas post-treatment system | |
| RU2546882C2 (en) | Method of air removal proportioning system in scr-system and to scr-system | |
| US20180149059A1 (en) | Method and system for controlling a catalytic converter system | |
| CN102667085A (en) | Method for determining the state of a reducing agent in a reducing agent tank | |
| CN104395572A (en) | Exhaust gas purification device, and method for thawing liquid reducing agent or precursor thereof | |
| JP6167781B2 (en) | Urea water concentration misdiagnosis prevention system | |
| CN101809257A (en) | SCR system and method for cleaning thereof | |
| US10989094B2 (en) | Method and system for determining a quantity of liquid in a tank | |
| WO2019191528A9 (en) | METHODS AND DEVICES FOR CONTROLLING UREA MIXERS TO REDUCE NOx EMISSION FROM COMBUSTION ENGINES | |
| CN102713183B (en) | For heating equipment for the reducing agent in the SCR system of Motor Vehicle and method | |
| KR20140036319A (en) | Method and device for testing a liquid | |
| CN102852602A (en) | SCR (selective catalytic reduction) system for vehicles | |
| CN107435570A (en) | Diesel motor exhaust after-treatment system and fluid operating system | |
| CN107327332A (en) | SSCR systems based on solid ammonia storage material | |
| CN209764395U (en) | High-temperature-resistant detection device for urea nozzle | |
| CN209855885U (en) | Control device for removing urea crystals by SCR system | |
| GB2533099A (en) | Method for providing heating to a diesel exhaust fluid (DEF) tank and diesel exhaust fluid (DEF) tank | |
| JP2021162005A (en) | Control method for exhaust gas treatment device | |
| CN104500183A (en) | Siphon type Adblue urea adding method and device | |
| CN205559029U (en) | Diesel engine exhaust aftertreatment system | |
| CN110953051B (en) | Method for detecting the quality of a reducing agent | |
| JP4895887B2 (en) | Engine exhaust purification system | |
| JP2017180203A (en) | Urea water addition system for internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | 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 |