WO2002027280A2 - Verfahren und vorrichtung zum bestimmen des füllstandes einer flüssigkeit in einem behälter - Google Patents
Verfahren und vorrichtung zum bestimmen des füllstandes einer flüssigkeit in einem behälter Download PDFInfo
- Publication number
- WO2002027280A2 WO2002027280A2 PCT/DE2001/003592 DE0103592W WO0227280A2 WO 2002027280 A2 WO2002027280 A2 WO 2002027280A2 DE 0103592 W DE0103592 W DE 0103592W WO 0227280 A2 WO0227280 A2 WO 0227280A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- container
- level
- reference electrode
- fill level
- liquid
- Prior art date
Links
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
-
- 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
- G01F23/14—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 measurement of pressure
- G01F23/18—Indicating, recording or alarm devices actuated electrically
-
- 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
-
- 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
- G01F23/241—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 for discrete levels
- G01F23/242—Mounting arrangements for electrodes
-
- 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
- F01N2610/14—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
- F01N2610/148—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
- F01N2900/1808—Pressure
-
- 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
Definitions
- the invention relates to a method and a device for determining the fill level of a liquid, in particular for a reducing agent for exhaust gas aftertreatment in an internal combustion engine which is stored in a container and carried in a motor vehicle.
- the nitrogen oxide emission of an internal combustion engine working with excess air can be reduced to atmospheric nitrogen (N 2 ) and water vapor (H 2 O) using the SCR process (selective catalytic reduction).
- Gaseous ammonia (NH 3 ), ammonia in aqueous solution or urea in aqueous solution can be used as reducing agents.
- the urea serves as an ammonia carrier and is injected into the exhaust system with the aid of a dosing system in front of a hydrolysis catalytic converter, where it is converted to ammonia by hydrolysis, which then in turn reduces the nitrogen oxides in the actual SCR catalytic converter, often referred to as DeNOx catalytic converter.
- Such an exhaust gas aftertreatment system working with liquid reducing agent has as essential components a reducing agent tank, a pump, a pressure regulator, a pressure sensor, a metering valve and the necessary connecting lines.
- the pump conveys the reducing agent stored in the reducing agent container to the metering valve, by means of which the reducing agent is injected into the exhaust gas stream upstream of the hydrolysis catalytic converter.
- the metering valve is controlled via signals from a control device in such a way that a specific, currently required amount of reducing agent is supplied to the internal combustion engine depending on operating parameters (DE 197 43 337 Cl). Reliable monitoring of the fill level in the reducing agent tank is necessary to ensure the continuous availability of such an SCR exhaust gas aftertreatment system.
- the driver of the motor vehicle should be made visually and / or acoustically aware of refilling the container, for example during the next refueling stop.
- the level is determined by measuring the electrical resistance between two highly conductive electrodes (stainless steel rods).
- the electrical resistance results from the limited conductivity of the reducing agent solution between the electrodes. In principle, the electrical resistance is therefore indirectly proportional to the immersion depth of the electrodes.
- the conductivity of the reducing agent solution depends on the concentration, temperature and chemical composition (proportion of free ammonia in the solution when using an aqueous urea solution)
- the conductivity is also measured with level-independent reference electrodes in order to determine the ratio of the measured values from the reference and level electrodes to calculate the tank level.
- the relatively large variation range of the conductivity requires a large measuring range in the erteelektronik, which limits the resolution and accuracy of the measurement (DE 198 41 770 AI).
- the invention is based on the object of specifying a method and a device with which or with which the fill level of an electrically conductive liquid in a container can be determined in a simple manner.
- the electrodes for the level measurement are rather designed in such a way that the measured value changes abruptly when certain limit values of the level are exceeded or fallen below. These jumps in measured values can be reliably recognized without high demands on the measuring accuracy.
- the states "full container”, “minimum fill level in the container” and “empty container” are usefully defined as such limit values.
- the solution described combines the accuracy advantages of limit switches with the advantages of a continuous level indicator.
- the mechanically simple principle of conductivity measurement is combined with the possibilities offered by a control computer in the dosing control unit, thus enabling an exact and continuous level display, which also enables self-calibration of the reducing agent dosage due to the absolutely stable limit value detection.
- Figure 1 is a block diagram of an internal combustion engine with associated exhaust gas aftertreatment system, in which the device and the method for level determination is used and
- Figure 2 is a schematic representation of a container with the device according to the invention
- FIG. 1 in the form of a block diagram, an internal combustion engine operated with excess air with an exhaust gas aftertreatment system assigned to it is shown in a very simplified manner. Only those parts are shown that are necessary for understanding the invention. In particular, the representation of the fuel circuit has been omitted.
- a diesel internal combustion engine is shown as the internal combustion engine, and aqueous urea solution is used as the reducing agent for aftertreatment of the exhaust gas.
- the internal combustion engine 1 is supplied with the air required for combustion via an intake line 2.
- An injection system which can be designed, for example, as a high-pressure accumulator injection system (common rail) with injection valves that inject fuel KST directly into the cylinders of internal combustion engine 1, is identified by reference number 3.
- the exhaust gas of the internal combustion engine 1 flows via an exhaust gas line 4 to an exhaust gas aftertreatment system 5 and from there via a silencer (not shown) to the outside.
- a known engine control unit 6 is connected to the internal combustion engine 1 via a data and control line 7, which is only shown schematically here. Via this data and control line 7, signals from sensors (e.g. temperature sensors for intake air, charge air, coolant, load sensor, speed sensor) and signals for actuators (e.g. injectors, actuators) are transmitted between the internal combustion engine 1 and the engine control unit 6.
- sensors e.g. temperature sensors for intake air, charge air, coolant, load sensor, speed sensor
- actuators e.g. injectors, actuators
- the exhaust gas aftertreatment system 5 has a reduction catalytic converter 8 which contains a plurality of catalytic converter units which are connected in series and are not designated in any more detail. Downstream and / or upstream of the reduction catalytic converter 8, an oxidation catalytic converter can each be additionally arranged (not shown). Furthermore, a metering control device 9 is provided, which is assigned to a reducing agent storage container, hereinafter simply referred to as container 10, with an electrically controllable reducing agent pump 11 for conveying the reducing agent. The reducing agent pump 11 can also be arranged inside the container 10.
- aqueous urea solution which is stored in the container 10, serves as the reducing agent.
- This has an electrical heating device 12 and sensors 13, 14, which determine the temperature of the urea solution or record the level in the container 10.
- the signals of a temperature sensor arranged upstream of the reduction catalytic converter 8 and of an exhaust gas measuring sensor arranged downstream of the reduction catalytic converter 8, for example a NOx sensor (not shown), are also transferred to the metering control device 9.
- the metering control device 9 controls an electromagnetic metering valve 15, to which urea solution is fed from the container 10 via a feed line 16 with the aid of the reducing agent pump 11.
- a pressure sensor 18 is inserted into the feed line 16, which detects the pressure in the metering system and emits a corresponding signal to the metering control device 9.
- the urea solution is injected by means of the metering valve 15 into the exhaust line 4 upstream of the reduction catalytic converter 8.
- the metering control device 9 is connected to the engine control device 6 for mutual data transfer via an electrical bus system 17.
- the operating parameters relevant for calculating the amount of urea solution to be metered such as e.g. Machine speed, air mass,
- the metering control unit 9 calculates the amount of urea solution to be injected and emits a corresponding electrical signal to the metering valve 15 via an electrical connection line (not specified).
- the urea is hydrolyzed and mixed by the injection into the exhaust line 4.
- the catalytic converter the catalytic reduction of NOx in the exhaust gas to N 2 and " H 2 O.
- the metering valve 15 for introducing the urea solution into the exhaust line 4 largely corresponds to a conventional low-pressure gasoline injection valve, which e.g. is releasably attached to a valve receptacle device firmly connected to a wall of the exhaust pipe 4.
- FIG. 2 shows a sectional view of the container 10 for storing aqueous reducing agent 19, such as urea solution, only the components necessary for determining the fill level being shown.
- aqueous reducing agent 19 such as urea solution
- supply and discharge openings for the reducing agent 19, the reducing agent pump used for conveying the reducing agent, filter and the associated connecting lines are not shown.
- the container 10 is preferably made of an electrically poorly conductive or non-conductive material, for example of plastic, and is either installed freely accessible inside the vehicle or only the filler opening of the container 10 is accessible to the driver. If the container 10 is installed in the vehicle at a point which ensures that at least one of its side walls is visible, it is expedient to choose a transparent material for the container 10, since then an additional visual control of the fill level is made possible ,
- the container 10 from metal, for example from aluminum. However, it must be ensured that walls of the container 10, as an additional ground potential, do not exert too great an influence on the level measurement.
- a carrier part 101 is arranged on the top of the container 10 and is preferably releasably attached to the container 10. is used and is used for mounting and mutual electrical insulation of electrodes used for level measurement.
- these are a fill level electrode 141, a reference electrode 142 and a common reference electrode 143.
- the electrodes 141, 142, 143 mentioned are made of identical, sufficiently good electrical conductivity and reducing agent-resistant material, for example stainless steel or an electrically conductive plastic material. It only has to be ensured that the electrical resistance of the electrodes 141, 142, 143 is significantly lower than the electrical resistance of the reducing agent between two electrodes used for the measurement.
- the electrodes 141, 142, 143 each have a rod-like shape with the same cross section, but different lengths within the container 10. Starting from the carrier part 101, they each run parallel to one another within the container 10.
- the filling level electrode 141 is covered with an electrically insulating material 1411 over most of its length. No such insulating material 1411 is applied to an upper region 1412 facing the carrier part 101 and to its free end region 1413 facing the container bottom, so that an electrical contact to the reducing agent is possible in these regions 1412, 1413 with appropriate fill levels.
- the reference electrode 142 is likewise surrounded by an electrically insulating material 1411 and thus runs in an isolated manner up to a point close to the bottom of the container 10 at which an electrically insulating separating element 144 is arranged, while the free one protruding below the separating element 144 End of the reference electrode 142 carries no insulation and thus falls below a correspondingly low fill level FS4, electrical contact to the reducing agent 19 is possible.
- the electrically insulating material 1411 for the fill level electrode 141 and the reference electrode 142 can be designed, for example, as an insulating hose or insulating tube, or these electrodes 141, 142 are coated or extrusion-coated with a corresponding material. Furthermore, it is also possible to design the two electrodes 141, 142 as so-called hollow electrodes in the form of tubular pieces which at the same time take over the function of a supply or removal line for the reducing agent, as described in DE 198 42 484 A1.
- the separating element 144 splits the total volume of the container 10 into two partial volumes, the volume enclosed between the container bottom, the container side walls and the separating element 144, in which the reference measurement is carried out, being significantly smaller than that between the partition 144, container side walls and the container top included volume.
- the separating element 144 can, as shown in FIG. 2, be designed as a plate or disk, each of which is adapted to the geometry of the container 10 in the base area in such a way that a mutual influence of the fill level electrode 141 and the reference electrode 142 can be avoided. If the separating element 144 has a large area, as shown in FIG. 2, then it must be ensured by cutouts, openings or the like that sufficient reducing agent can also get into the volume below the separating wall 144.
- the reducing agent pump and a filter or sieve upstream of the reducing agent pump can also advantageously be arranged in this largely separated volume.
- a reference electrode 143 (ground electrode) is arranged between the fill level electrode 141 and the reference electrode 142, which common ground electrode for the fill level 1 1 1 1 1 P 1 xi
- the electrode areas 1412, 1413 immersed in the reducing agent 19 represent a parallel connection of two identical electrical resistors, and when the container 10 is full, the lower area 1421 of the reference electrode 142 is also immersed in the reducing agent 19, the value of the measured resistance R meSs is half as much large as the value of the reference resistance Rref-
- the two measured values R meS s and R re -. equal. If the reducing agent in the container 10 drops below the area 1413 of the fill level electrode 141, that is to say both areas 1412, 1413 are not wetted with reducing agent, the measured electrical resistance is very high, which is equivalent to the insulation resistance (ideally an infinitely large resistance). This level is called the minimum level FS3.
- the value for the minimum fill level FS3 and thus the clear distance between the lower end of the area 1413 and the bottom of the container 10 is determined such that when the minimum fill level FS3 is reached in the container 10 there is still so much reducing agent 19 in the container 10 that the vehicle can still be operated with the exhaust gas aftertreatment system until the next fuel stop, at which fuel is also to be refueled anyway, even if the vehicle was refueled shortly before the minimum fill level FS3 was reached.
- rö ⁇ P 0 co Xi 0 ⁇ -P ⁇ M co g ⁇ : rö d P 4-> xi rö ⁇ 4-1 i O XI ddo M Di 4-1> M ⁇ N ⁇ £ P to i XI -P ⁇ cn ⁇ J co P o 4- ) ⁇ ⁇ P ⁇ ⁇ PJMXP d N d C-, M Di ⁇ ⁇ i -P -P co
- CO ro 4-1 is PQ> 2 4-1 -P H Q 4H E CO co 4-1 EL. s> co co to s Di 44 -P CO i> Q N M
- reducing agent 19 flows into the container 10 until the fill level FS2 is reached and then the metering control unit 9 switches off the pump and therefore due to the full Container 10 stops filling.
- the continuous fill level display is now 100% or the maximum fill quantity e.g. display in liters.
- the metering control device 9 continuously adds up the metered amount of reducing agent and uses it to calculate the current fill level. If the actual fill level reaches the "minimum fill level" (fill level Fs3), the vehicle operator is signaled that the next time the fuel is stopped, reducing agent must also be refilled.
- the metering control device 9 can now compare its calculation with the actual fill level and, if necessary, correct the data used for the throughput of the metering valve 15. If no reducing agent 19 is refilled at the next fuel stop or if the limit value "empty" (fill level FS4) is reached beforehand due to special circumstances, the metering of the reducing agent is stopped in order to prevent the metering system from running dry.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020037004371A KR100865597B1 (ko) | 2000-09-26 | 2001-09-18 | 용기 내부의 액체 레벨을 측정하기 위한 방법 및 장치 |
EP01980172A EP1322921A2 (de) | 2000-09-26 | 2001-09-18 | Verfahren und vorrichtung zum bestimmen des füllstandes einer flüssigkeit in einem behälter |
JP2002530612A JP2004510151A (ja) | 2000-09-26 | 2001-09-18 | タンク内の液体の水位を測定するための方法および装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10047594.9 | 2000-09-26 | ||
DE10047594A DE10047594A1 (de) | 2000-09-26 | 2000-09-26 | Verfahren und Vorrichtung zum Bestimmen des Füllstandes einer Flüssigkeit in einem Behälter |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002027280A2 true WO2002027280A2 (de) | 2002-04-04 |
WO2002027280A3 WO2002027280A3 (de) | 2002-06-27 |
Family
ID=7657643
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2001/003592 WO2002027280A2 (de) | 2000-09-26 | 2001-09-18 | Verfahren und vorrichtung zum bestimmen des füllstandes einer flüssigkeit in einem behälter |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1322921A2 (de) |
JP (1) | JP2004510151A (de) |
KR (1) | KR100865597B1 (de) |
DE (1) | DE10047594A1 (de) |
WO (1) | WO2002027280A2 (de) |
Cited By (31)
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WO2004003489A1 (en) * | 2002-05-31 | 2004-01-08 | Honda Giken Kogyo Kabushiki Kaisha | Liquid level sensor using a non linear rheostat and a float |
WO2005026710A1 (ja) * | 2003-09-11 | 2005-03-24 | Mitsui Mining & Smelting Co., Ltd. | 尿素溶液の尿素濃度識別装置 |
WO2005026709A1 (ja) * | 2003-09-11 | 2005-03-24 | Mitsui Mining & Smelting Co., Ltd. | 尿素溶液の尿素濃度識別装置 |
WO2005040567A1 (ja) * | 2003-10-27 | 2005-05-06 | Nissan Diesel Motor Co., Ltd. | 液体判別装置及び液体判別方法 |
WO2005040570A1 (ja) * | 2003-10-28 | 2005-05-06 | Nissan Diesel Motor Co., Ltd. | エンジンの排気浄化装置及び排気浄化方法 |
WO2005042936A1 (ja) * | 2003-10-31 | 2005-05-12 | Nissan Diesel Motor Co., Ltd. | 液体還元剤の濃度及び残量検出装置 |
US7030629B1 (en) | 2004-11-18 | 2006-04-18 | Siemens Vdo Automotive Corporation | In line fluid quality sensor |
WO2006051770A1 (ja) * | 2004-11-15 | 2006-05-18 | Nissan Diesel Motor Co., Ltd. | 濃度検出装置及びこれを備えるエンジンの排気浄化装置 |
EP1731882A1 (de) * | 2004-03-29 | 2006-12-13 | Nissan Diesel Motor Co., Ltd. | Struktur für reduktionsmittelbehälter |
WO2006132056A1 (ja) * | 2005-06-10 | 2006-12-14 | Nissan Diesel Motor Co., Ltd. | 液体還元剤判別装置 |
US7222528B2 (en) | 2005-03-03 | 2007-05-29 | Siemens Vdo Automotive Corporation | Fluid level sensor |
EP1950386A2 (de) | 2007-01-25 | 2008-07-30 | Hydraulik-Ring Gmbh | Kalibrierte Dosiereinheit, insbesondere einer Abgasnachbehandlungseinheit |
CN100439667C (zh) * | 2004-05-13 | 2008-12-03 | 日产柴油机车工业株式会社 | 还原剂容器的结构 |
US7466147B2 (en) | 2005-08-08 | 2008-12-16 | Continental Automotive Systems Us, Inc. | Fluid quality sensor |
US7587288B2 (en) | 2004-10-29 | 2009-09-08 | Nissan Diesel Motor Co., Ltd. | Condition discriminating apparatus for liquid reducing agent |
WO2010023011A1 (de) * | 2008-08-29 | 2010-03-04 | Robert Bosch Gmbh | Tank zur bevorratung eines flüssigen wirkstoffes |
US7743603B2 (en) | 2004-11-05 | 2010-06-29 | Nissan Diesel Motor Co., Ltd. | Exhaust gas purification apparatus |
US7758826B2 (en) | 2004-05-13 | 2010-07-20 | Nissan Diesel Motor Co., Ltd. | Structure of reducing agent container |
US7805930B2 (en) | 2004-10-29 | 2010-10-05 | Nissan Diesel Motor Co., Ltd. | Exhaust emission purifying apparatus for engine |
US7842267B2 (en) | 2004-12-24 | 2010-11-30 | Nissan Diesel Motor Co., Ltd. | Exhaust emission purifying apparatus for engine |
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Also Published As
Publication number | Publication date |
---|---|
JP2004510151A (ja) | 2004-04-02 |
DE10047594A1 (de) | 2002-04-18 |
EP1322921A2 (de) | 2003-07-02 |
KR100865597B1 (ko) | 2008-10-27 |
WO2002027280A3 (de) | 2002-06-27 |
KR20030036841A (ko) | 2003-05-09 |
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