CN102434254B - Reducing agent reservoir vessel - Google Patents
Reducing agent reservoir vessel Download PDFInfo
- Publication number
- CN102434254B CN102434254B CN201110282313.7A CN201110282313A CN102434254B CN 102434254 B CN102434254 B CN 102434254B CN 201110282313 A CN201110282313 A CN 201110282313A CN 102434254 B CN102434254 B CN 102434254B
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- Prior art keywords
- reservoir vessel
- volume
- resistance
- pin
- pipe
- 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.)
- Expired - Fee Related
Links
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 48
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000004202 carbamide Substances 0.000 claims abstract description 5
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 238000012958 reprocessing Methods 0.000 claims abstract description 3
- 239000002912 waste gas Substances 0.000 claims abstract description 3
- 239000004020 conductor Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 11
- 229920003023 plastic Polymers 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- -1 wherein Substances 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 239000012777 electrically insulating material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- 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]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
-
- 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
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
-
- 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
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
- F01N2610/142—Controlling the filling of the tank
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1814—Tank level
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention relates to a kind of reservoir vessel for reducing agent, wherein, reducing agent to be stored is preferably used for the waste gas of combustion motor and carries out the urea liquid of the water of reprocessing, and described reservoir vessel (1) comprises the sensor device (2) for measuring liquid level.According to the present invention, described sensor device (2) is arranged in the outside of described reservoir vessel (1), and comprise at least one resistance chain (3,4) volume (6) and with the inner space (5) of described reservoir vessel (1) be connected, described volume (6) and described resistance chain (3,4) form electrical contact.The invention still further relates to a kind of sensor device for measuring the liquid level in this reservoir vessel.
Description
Technical field
The present invention relates to the reservoir vessel for reducing agent, wherein, described reservoir vessel has the sensor device for detecting liquid level, the urea liquid of described reducing agent preferably for carrying out the water of reprocessing to the waste gas from internal-combustion engine.When liquid reducing agent must suck in internal combustion engine exhaust system, be therefore specially adapted to the entrance of SCR system (selective catalytic reduction) according to reservoir vessel of the present invention, so as in SCR catalyst catalytic reduction of nitrogen oxide.
The invention still further relates to a kind of sensor device for measuring liquid level in this reservoir vessel.
Background technique
The reservoir vessel of the above-mentioned type is such as learnt by disclosed patent documentation DE10047594A1.In order to obtain the accurate instruction of actual liquid level, abandon in four corner, carrying out continuous measurement to liquid level in container.The substitute is and propose a kind of such sensor device of structure: when the limiting value of the determination higher or lower than liquid level, measured value can change by jump type.This measured value jumps can not make high request to accurately identification measuring accuracy.For this reason, described sensor device always comprises a conduction liquid level electrode, and a reference electrode and a reference electrode, they are all arranged in internal tank.In order to measure liquid level, measuring the resistance between described liquid level electrode and described reference electrode and the resistance between described reference electrode and reference electrode, and becoming the standard of liquid level in container.For this reason, the institute of corresponding pointwise detection liquid level only chosen area display contacts with liquid electric, and liquid level electrode and reference electrode portion ground electrically insulating material are encapsulated.In selected region, liquid level electrode and reference electrode are shown in liquid electric and contact, and selected region is spaced apart from each other, when the liquid in these regions reaches or discharges, and resistance value significant change.Preferably, these three electrodes are arranged in parallel to each other, wherein, do not immerse the different degree of depth in a liquid with the region of electrically insulating material encapsulating.
Because the urea liquid of the water added as reducing agent freezes at subzero 11 DEG C, be immersed in liquid for the sensor device of liquid level gauging in exist because expanding and impaired danger when liquid freezes.Therefore, consider that protection sensor device is not by icing pressure damage.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of reservoir vessel of sensor device had for measuring liquid level, described sensor device is quite insensitive to icing pressure.Still further provides this sensor device.
Described object is by having the reservoir vessel of the feature of claim 1 and being realized by the sensor device of the feature with claim 9.Favourable improvement project of the present invention provides in the dependent claims.
The proposed reservoir vessel for reducing agent comprises sensor device, according to the present invention, described sensor device arrangement in the outside of described reservoir vessel and comprise at least one resistance chain and one there is the volume be connected with described reservoir vessel inner space, and described volume and described resistance chain form electrical contact.
Because the inner space of described volume with described reservoir vessel is connected, therefore, the liquid in the liquid in described volume and described inner space balances each other.Preferably, described two volumes connect, to comprise low liquid level at the end point of the inner space of described reservoir vessel.Further preferably, connect in the sump region of described reservoir vessel.In order to the oblique position at described reservoir vessel also obtains the authentic communication about liquid level, be proposed in further on described reservoir vessel and arrange two resistance chains, wherein, the volume electrical contact that in described reservoir vessel inner space connect same with one of described two resistance chains, can calculate the middle liquid level in described reservoir vessel like this by mensuration minimum value and maximum value.
Detect liquid level in order to utilize with at least one resistance chain of described volume electrical contact, the reducing agent be stored in described volume is used as conductor.The urea liquid of water has the specific resistance of 10Ohmcm under unused state, has 200Ohmcm specific resistance in a state of use.Therefore the resistance value transmitted by described resistance chain forms resistance Ri and resistance Ra, and wherein, Ri is the internal resistance in the region of the volume being full of reducing agent, and Ra is the outer side resistance in the region of the volume not being full of reducing agent.At the multiple resistance chain of use, when preferably using two resistance chains, all-in resistance R
gesamt=Ra '+Ri '+Ri " '+Ra "+Ri ", wherein, resistance Ri " ' formed by the reducing agent being arranged in the conduction of described reservoir vessel storage tank.Measured resistance value to output unit, measures the liquid level in described reservoir vessel as quasi-continuous signal transmission thus.
Prevent described device from suffering damage when reducing agent freezes in described reservoir vessel outside described sensor device arrangement.No longer being positioned at the surperficial center of gravity of described reservoir vessel in order to compensate for sensor device, preferably proposing with two resistance chains as sensor device.
Described resistance chain preferably uses the high resistivity conductor of resistance wire form, and it has the pin multiple spaced apart from each other making described resistance chain and described volume electrical contact.Further preferably, the resistance value outside volume described in described high resistivity conductor is chosen as the resistance value apparently higher than the reducing agent in described volume.Different resistance value Ra and Ri is utilized to measure liquid level thus.
According to a preferred embodiment of the invention, the volume configuration be connected with the inner space of described reservoir vessel becomes to manage.In order to make described resistance chain and volume electrical contact, described pin is guided by wall.Alternately, flexible pipe is selected to replace pipe.The advantage of flexible pipe is used to be that described flexible pipe is flexible, so described flexible pipe easily adapts to the exterior contour of described reservoir vessel.Advantageously, described pipe or flexible pipe are also configured to be slight elasticity, to expand to allow when reducing agent freezes.
Preferably, described pipe or flexible pipe are made of plastics.Further preferably, described pin is by the pressure injection-moulded encapsulating of plastic materials of described pipe or flexible pipe.Described pin is therefore by plastic materials electrical insulation.
In pressure injection-moulded encapsulating region, described pin preferably has structurized and/or that type is wide surface, so that the rubbing contact improved between described pin and plastic materials and/or positive.Further, the reliable sealing between described volume and surrounding environment is obtained by this way.The wide surface of type has the advantage that this labyrinth sealing contributes to being formed reliable sealing further.
Connection between described pin and high resistivity conductor preferably utilizes riveted joint, melting welding or soldering to realize.Therefore ensure that forming conduction connects.
Because described pin is contacted with described reducing agent by described volume, described pin is preferably made up of the material of resistance to reducing agent.Propose that stainless steel is as preferred material.
According to a preferred embodiment of the invention, described sensor device comprises at least two resistance chains, each in two resistance chains is connected with the volume of pipe or inside hose, wherein, described pipe or flexible pipe are arranged in the exterior circumferential around described reservoir vessel, in described reservoir vessel oblique position, minimum liquid level and the highest liquid level can be recorded, to measure the intermediate altitude of described reservoir vessel internal liquid level.Be essentially in square reservoir vessel, described two resistance chains be enclosed in respectively in pipe or flexible pipe are preferably directed to the upside of container upward by the container storage tank on aspectant side.Therefore, within the scope of the sump region of described container, one is preferably respectively arranged for two pipes of sensor device or the port of flexible pipe.In the upside of described container, described sensor device can be connected with output unit.
In order to solve the target described in the beginning of this specification, the present invention also proposes a kind of sensor device for measuring liquid level in reducing agent reservoir vessel, described sensor device comprises at least one resistance chain, there is high resistivity conductor and multiple pin be arranged on high resistivity conductor that form is resistance wire, and there is pipe or the flexible pipe of volume, described volume and high resistivity conductor form electrical contact.Here, the resistance chain of described pipe or flexible pipe and high resistivity form of conductors can utilize pin fixed thereon to form an assembly, and it allows in a straightforward manner around container deposit.Therefore further preferably, described total sensor device is flexible arrangement.Advantageously, an end of sensor is settled towards the port on the storage tank of reservoir vessel, and the port on another end output unit is settled.This sensor device is applicable to improve the reservoir vessel existed thus, and described reservoir vessel can have arbitrary shape.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described.In the accompanying drawings:
Fig. 1 is through the schematic sectional view according to reservoir vessel of the present invention;
Fig. 2 is through the partial longitudinal section figure according to sensor device of the present invention;
Fig. 3 is the sectional view of prong area in Fig. 2; And
Fig. 4-6 is the reservoir vessels of the Fig. 1 being in different attitude.
Embodiment
The sectional view according to reservoir vessel of the present invention is described in the indicative icon of Fig. 1.Reservoir vessel of the present invention has rectangular cross sectional shape, so inner space 5 is limited by parallel sidewall and base section and top section.Base section has the lower recess as storage tank 13.Sensor device 2 is connected on the storage tank 13 of reservoir vessel 1, current, and sensor device 2 comprises the first resistance chain 3 comprising flexible pipe 9 and the second resistance chain 4 comprising flexible pipe 9 equally.Two flexible pipes are connected with reservoir vessel 1, the inner space of container is formed with the respective volume 6 of flexible pipe 9 and is communicated with.Therefore the reducing agent be present in reservoir vessel 1 also arrives in the volume 6 of flexible pipe 9.Resistance chain 3,4 comprises the high resistivity conductor 7 of resistance wire form, and high resistivity conductor 7 is parallel to flexible pipe 9 respectively and extends, and the multiple pins 8 made through conductive material are formed with the volume 6 of each flexible pipe 9 and contact.Therefore, sensor device 2 is respectively by the flexible pipe 9 with volume 6, and the pin 8 being arranged in resistance wire outside volume 6 and multiple spaced layout is formed, and pin 8 forms electrical contact for making the volume 6 of resistance wire and flexible pipe 9.Corresponding sensor device 2 is described in fig. 2 in detail.
In the sensor device 2 of Fig. 2, flexible pipe 9 is made up of plastic materials, and pin 8 also uses the pressure injection-moulded encapsulating of plastic materials.In pressure injection-moulded encapsulating region, pin 8 has the wide surface of type 11 (especially see Fig. 3) respectively, guarantees the labyrinth sealing between volume 6 and surrounding environment like this.Therefore, ensure that the reducing agent existed in volume 6 can not to exosmosis in the pressure injection-moulded encapsulating region of pin 8.Pin 8 is arranged on uniform intervals ground each other.Further, the layout of pin 8 is selected like this, makes pin 8 stretch in the volume 6 of flexible pipe 9 and another end respectively with an end and is formed with high resistivity conductor 7 and be connected 12.Connect 12 and can be configured to riveted joint, melting welding or soldering.Each pin 8 is depicted as a measuring point, wherein, each measuring point on the wall 10 of flexible pipe 9 with adjacent pin 8 electrical insulation, flexible pipe 9 is preferably made of plastics.The connection of volume 6 inside is worked by existing reducing agent.When sensor device runs, the active component Ra of all-in resistance by outside resistance wire and the active component Ri by reducing agent bridge joint is formed.Resistance value is transmitted by the port one 4 on output unit, measures the liquid level in the inner space 5 of reservoir vessel 1 thus.The precision of measurement result can be adjusted by the centre distance each other of pin 8.
Learnt the different attitudes of reservoir vessel 1 by Fig. 4 to 6, when reservoir vessel 1 is arranged in Motor Vehicle upward slope or descending wherein or is parked on the road of corresponding slope, reservoir vessel 1 such as occupies these different attitudes.The outside that sensor device 2 is arranged in reservoir vessel 1 exists can not the shortcoming of liquid level in measuring plane center of gravity 15 region.Not enough in order to remove this, reservoir vessel 1 has the sensor device 2 that two sensor devices 2 or have two resistance chains 3,4, it is like this around reservoir vessel 1, make the liquid level in the volume 6 of flexible pipe 9 correspond respectively to minimum value and maximum value, the middle liquid level in plane center of gravity 15 region can be measured thus.In different attitudes shown in Fig. 4 to 6, total resistance value is substantially always identical or only have slight variations.But, assuming that lay two sensor devices 2 or resistance chain 3,4 around reservoir vessel 1, then in a volume 6, there is minimum level, and there is maximum fluid in another volume 6.Like this, the actual liquid level in the inner space 5 of reservoir vessel 1 corresponds to intermediate value.
Claims (15)
1., for a reservoir vessel for reducing agent, described reservoir vessel (1) comprises the sensor device (2) for measuring liquid level, it is characterized in that,
Described sensor device (2) is arranged in the outside of described reservoir vessel (1), and comprise at least one resistance chain (3,4) volume (6) and with the inner space (5) of described reservoir vessel (1) be connected, described volume (6) and described resistance chain (3,4) form electrical contact.
2. reservoir vessel according to claim 1, is characterized in that,
Described resistance chain (3,4) conductor (7) of the high resistivity of resistance wire form is had, this resistance wire have multiple spaced layout, for the pin (8) of the electrical contact of described resistance chain (3,4) and described volume (6).
3. reservoir vessel according to claim 2, is characterized in that,
Described volume (6) is configured in pipe, and described pin (8) extends through the wall (10) of described pipe.
4. reservoir vessel according to claim 3, is characterized in that,
Described pipe is made of plastics.
5. reservoir vessel according to claim 4, is characterized in that,
Described pin (8) is by the pressure injection-moulded encapsulating of the plastic materials of described pipe.
6. reservoir vessel according to claim 5, is characterized in that,
Described pin (8) has structurized surface (11) to improve the sealed and/or positive of friction between described pin and described plastic materials in the region of pressure injection-moulded encapsulating.
7. reservoir vessel according to claim 5, is characterized in that,
The surface (11) that described pin (8) has a type exterior featureization in the region of pressure injection-moulded encapsulating is to improve the sealed and/or positive of friction between described pin and described plastic materials.
8. the reservoir vessel according to any one in claim 2 to 7, is characterized in that,
The connection (12) of the conductor (7) of described pin (8) and described high resistivity be rivet, melting welding or soldering.
9. the reservoir vessel according to any one in claim 2 to 7, is characterized in that,
Described pin (8) is made up of the material of resistance to reducing agent.
10. the reservoir vessel according to any one in claim 1 to 7, is characterized in that,
Described sensor device (2) comprises at least two resistance chains (3,4), described at least two resistance chains (3,4) each in is connected with the volume (6) of pipe inside, wherein, described pipe is arranged around described reservoir vessel (1) in outside in this wise, to make when the oblique position of described reservoir vessel (1) not only minimum level, and most high liquid level (HLL) can be detected, to measure the inner average liquid level height of described reservoir vessel (1).
11. reservoir vessels according to claim 1, is characterized in that, the waste gas that reducing agent to be stored is used to combustion motor carries out the aqueous solution of urea of reprocessing.
12. reservoir vessels according to claim 9, is characterized in that,
Described pin (8) is made up of stainless steel.
13. reservoir vessels according to any one of claim 3-7, is characterized in that,
Described pipe is flexible pipe (9).
14. 1 kinds are used for measuring the sensor device for the liquid level in the reservoir vessel (1) of reducing agent, wherein, described sensor device (2) comprises at least one resistance chain (3, 4) and there is the pipe of volume (6), at least one resistance chain described has conductor (7) and multiple layout pin on the conductor (8) of the high resistivity of resistance wire form, described volume is by conductor (7) electrical contact of described pin (8) with described high resistivity, wherein, the volume (6) of described pipe is connected with the inner space (5) of described reservoir vessel (1).
15. sensor devices according to claim 14, is characterized in that,
Described pipe is flexible pipe (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010040877A DE102010040877A1 (en) | 2010-09-16 | 2010-09-16 | Rectangular-shape reservoir for use in selective catalytic reduction system to store aqueous urea solution for post-treatment of exhaust gas in combustion engine of motor car, has sensor device with volume that contact with resistor chains |
| DE102010040877.8 | 2010-09-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102434254A CN102434254A (en) | 2012-05-02 |
| CN102434254B true CN102434254B (en) | 2016-04-06 |
Family
ID=45768723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110282313.7A Expired - Fee Related CN102434254B (en) | 2010-09-16 | 2011-09-16 | Reducing agent reservoir vessel |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102434254B (en) |
| DE (1) | DE102010040877A1 (en) |
| FR (1) | FR2965012B1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5565851A (en) * | 1993-03-27 | 1996-10-15 | Solartron Group Limited | Fluid level sensing systems |
| DE10047594A1 (en) * | 2000-09-26 | 2002-04-18 | Siemens Ag | Method and device for determining the level of a liquid in a container |
| CN1900664A (en) * | 2005-07-19 | 2007-01-24 | 南京大学 | Resistance type water level sensor |
| CN201532227U (en) * | 2009-09-08 | 2010-07-21 | 海尔集团公司 | Water-level sensor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6223595B1 (en) * | 1998-06-04 | 2001-05-01 | Illinois Tool Works Inc | Resistive fluid level sensing and control system |
| DE10027183A1 (en) * | 2000-05-31 | 2001-12-20 | Siemens Ag | Determining level of electrically conducting liquid in container involves the liquid making contact between the resistance coating of one electrode and the other electrode |
| JP5126070B2 (en) * | 2009-01-06 | 2013-01-23 | マツダ株式会社 | Method and apparatus for determining the state of urea water and engine exhaust purification system |
| DE102009000101A1 (en) * | 2009-01-09 | 2010-07-15 | Robert Bosch Gmbh | tank design |
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2010
- 2010-09-16 DE DE102010040877A patent/DE102010040877A1/en not_active Withdrawn
-
2011
- 2011-09-02 FR FR1157782A patent/FR2965012B1/en not_active Expired - Fee Related
- 2011-09-16 CN CN201110282313.7A patent/CN102434254B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5565851A (en) * | 1993-03-27 | 1996-10-15 | Solartron Group Limited | Fluid level sensing systems |
| DE10047594A1 (en) * | 2000-09-26 | 2002-04-18 | Siemens Ag | Method and device for determining the level of a liquid in a container |
| CN1900664A (en) * | 2005-07-19 | 2007-01-24 | 南京大学 | Resistance type water level sensor |
| CN201532227U (en) * | 2009-09-08 | 2010-07-21 | 海尔集团公司 | Water-level sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2965012B1 (en) | 2015-12-25 |
| FR2965012A1 (en) | 2012-03-23 |
| DE102010040877A1 (en) | 2012-03-22 |
| CN102434254A (en) | 2012-05-02 |
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