CN111271165A - Method for detecting a filling error of a storage container in a motor vehicle - Google Patents
Method for detecting a filling error of a storage container in a motor vehicle Download PDFInfo
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- CN111271165A CN111271165A CN201911228287.2A CN201911228287A CN111271165A CN 111271165 A CN111271165 A CN 111271165A CN 201911228287 A CN201911228287 A CN 201911228287A CN 111271165 A CN111271165 A CN 111271165A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000004202 carbamide Substances 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000009924 canning Methods 0.000 claims abstract description 11
- 239000002283 diesel fuel Substances 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims description 8
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 claims description 4
- 239000000243 solution Substances 0.000 description 17
- 239000007864 aqueous solution Substances 0.000 description 12
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 239000007789 gas Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- 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
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/024—Analysing fluids by measuring propagation velocity or propagation time of acoustic waves
-
- 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
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
-
- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
-
- 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
- F01N2610/1413—Inlet and filling arrangements therefore
-
- 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
-
- 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
-
- 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
- F01N2900/1818—Concentration of the reducing agent
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/011—Velocity or travel time
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/022—Liquids
- G01N2291/0228—Aqueous liquids
-
- 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
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Acoustics & Sound (AREA)
- Toxicology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to a method for detecting a filling error of a storage container for a liquid, in particular for an aqueous urea solution, in a motor vehicle. The speed of sound in the liquid is known and a canning error is identified when the speed of sound deviates from an expected value.
Description
Technical Field
The invention relates to a method for detecting a filling error (Fehlbetankung) of a storage container in a motor vehicle.
Background
In the field of motor vehicle technology, selective catalytic converters, hereinafter referred to as SCR-converters, are known for reducing nitrogen oxides by means of the addition of an aqueous urea solution.
This aqueous solution of urea is stored in a storage tank and is introduced into the exhaust gas line of the internal combustion engine by means of a dosing system. The urea contained in the solution, after being converted into NH3, reacts with and reduces the nitrogen oxides to nitrogen in a catalyst. For such a selective catalytic reduction, a sufficient supply of NH3 from the catalyst is required in order to comply with predefined exhaust gas limits.
Thus, current exhaust legislation requires monitoring of the quality and quantity of reductant.
Usually, the injection nipples for the urea-water solution and the diesel fuel are arranged close to each other. In the event of a driver error, it may happen that the driver injects the fuel liquid into the storage tank for the urea aqueous solution during the filling process.
There is also the risk that the driver is filled with a low-quality urea-water solution. In particular, canning with urea in an aqueous solution having a concentration lower than a predetermined concentration is problematic.
Furthermore, methods and devices are known in which the quality of the urea aqueous solution is monitored by means of an ultrasonic sensor. The ultrasonic sensor measures the propagation time of the ultrasonic waves over a defined measuring section. The speed of sound is calculated in the sensor from the measured travel time and the known measurement path. In conjunction with the currently existing medium temperature, the urea concentration can be deduced.
Disclosure of Invention
In contrast, the method according to the invention with the features of the independent claims has the advantage that faulty refilling of liquids, for example diesel fuel, can be reliably and easily detected. In particular, all liquids whose sound speed is significantly lower or higher than the urea aqueous solution can be reliably identified.
This is achieved in that, in a method for detecting a filling error for a liquid in a motor vehicle, in particular for a storage tank for an aqueous urea solution, the sound speed in the liquid is determined and, if the sound speed deviates from a desired value, a filling error is detected.
A particularly reliable identification of a canning error is obtained when the speed of sound is between the first threshold value and the second threshold value. In this case, it is considered that canning was performed with a poor-quality urea aqueous solution.
If the speed of sound is identified to be below a second threshold, a canning error with diesel fuel is identified.
By checking in which value domain the speed of sound is, the type of canning error can be identified. That is to say it is possible to distinguish between diesel fuel and urea in aqueous solution of too low a concentration.
It is particularly advantageous to perform a check whether there is a canning error when the temperature is above a threshold. The threshold is selected such that the acoustic velocity of the diesel fuel is less than the acoustic velocity of water. The temperature of the aqueous urea solution is preferably used for this purpose. Alternatively, a temperature, which is characteristic for the temperature of the aqueous urea solution, may also be measured and used.
In a further aspect, the invention relates to a new program code together with processing instructions for creating a computer program that is executable on a controller, in particular a source code with compiling and/or linking instructions, wherein the program code, when converted, i.e. in particular compiled and/or linked, into the executable computer program according to the processing instructions, generates the computer program for implementing all the steps of one of the described methods. The program code may be given, inter alia, by a source code, which may be downloaded, for example, from a server in the internet.
Drawings
Figure 1 shows a schematic view of a dosing device for an SCR catalyst system,
FIG. 2 shows different signals plotted over time, an
Fig. 3 shows a flow chart for explaining the working according to the invention.
Detailed Description
The main elements of an SCR catalyst system for dosing an aqueous urea solution are shown in fig. 1. The aqueous urea solution is located in the storage tank 100 and from there via the dosing device 110 into the exhaust gas line 120 of the internal combustion engine. In the exhaust gas line, the exhaust gas preferably passes directly into the SRC catalytic converter or into an exhaust gas line leading into the SRC catalytic converter. The SRC catalyst system is used for reducing nitrogen oxides in the exhaust gas of an internal combustion engine by means of Selective Catalytic Reduction (SCR). For reduction, the reducing agent for the dosing device 110 is injected into the exhaust gas line 120 upstream of the SRC catalyst.
The urea aqueous solution is stored in a storage vessel 100. An ultrasonic sensor 130 is arranged in the storage tank. The sound velocity of the urea aqueous solution can be measured by means of the ultrasonic sensor 130. The output signal of the ultrasonic sensor 130 reaches the controller 140. The controller in particular operates the dosing device 110. Furthermore, the control unit can also control other elements of the exhaust system and of the internal combustion engine. In addition, other sensors for forming the control signals can also be evaluated.
In particular, a temperature sensor is provided, which detects a temperature value. Here, the temperature in the exhaust gas line is preferably used. For this purpose, in particular, a sensor 150 is provided. Which also provides a signal to the controller 140.
In addition, a temperature value T corresponding to the temperature of the aqueous urea solution is detected.
In fig. 2, the dependence of the sound speed SG of different liquids on the temperature T of the liquid is plotted. The values for the urea aqueous solution are plotted with a dotted line, the values for almost pure water with a dashed line and the values for diesel fuel with a solid line. The urea aqueous solution has the highest sound velocity. Which increases with increasing temperature T. The sound velocity of water is significantly lower but also increases with increasing temperature. In contrast, diesel has a significantly lower sound velocity. Which decreases with increasing temperature. For low temperature values, the sound velocity of diesel fuel is equal to or even greater than that of pure water. Starting from the temperature TS, the sound velocity of the diesel fuel becomes smaller than the sound velocity of water.
On the one hand, refilling (nachgetankt) with urea aqueous solution having a lower concentration or even pure water or diesel fuel is possible due to undesired or unintentional filling errors. This is reliably recognized by the method described below. According to the invention, the sound speed SG is measured for this purpose.
If the speed of sound is in the region between the dotted and dashed lines, an error is identified in which the replenishment tank is filled with an aqueous urea solution having an insufficient concentration. In this case, it is preferable to continue operating the dosing system, since a certain reduction of nitrogen oxides also occurs with a lower dosing of the aqueous urea solution.
Conversely, if a sound speed significantly lower than the water sound speed is measured, a false bit (fehlebert) is set, which causes the system to shut down for component protection reasons. This prevents further components from being damaged by the dosing of diesel into the exhaust gas line.
This makes it possible, for example, to detect the refilling of fuel and to place the system in a safe state. By extending this function with additional interrogation, additional liquids with higher sound velocities than the aqueous urea solution can also be identified.
Fig. 3 shows an exemplary embodiment of the operating mode according to the invention as a flow chart. In a first step 300, the sound speed SG and the temperature T of the liquid in the storage tank 100 are measured. The subsequent query 310 checks: whether the temperature T is greater than the regulation value TS. Using this query 310 ensures that the measurement is only carried out in a temperature range above TS, in which the sound velocity of the diesel fuel is smaller than the sound velocity of water.
If query 310 identifies a temperature T that is less than or equal to TS, the process ends in step 315. If the query 310 identifies a temperature T greater than TS, the query 320 checks whether the speed of sound SG is less than a first threshold S1. If this is not the case, the procedure is also ended in step 315. If the speed of sound is less than the first threshold S1, query 330 checks whether the speed of sound SG is also less than a threshold S2. The second threshold value S2 is here significantly smaller than the first threshold value S1. A range in which urea-water solutions having an impermissible urea concentration are identified is defined by the threshold values S1 and S2. This is identified by: when query 320 identifies a sound velocity less than the first threshold S1 and second query 330 identifies a sound velocity greater than the threshold S2. If this is the case, an aqueous urea solution having insufficient characteristics is identified in step 340. In this case, this is displayed to the driver, a corresponding recording is carried out in the fault memory, and, if necessary, an emergency driving operation is started.
If query 330 identifies that the speed of sound is also less than the second threshold S2, then in step 350, a canister with diesel fuel is identified. In this case, immediate shut-down of the exhaust gas aftertreatment system is carried out. If necessary, this can likewise be displayed to the driver and a corresponding record can be made in the fault memory.
This means that an insufficient concentration of the aqueous urea solution is identified in the sound speed value range between the first threshold value S1 and the second threshold value S2. The filling with fuel is identified in the range below the threshold S2.
In an advantageous embodiment, the measurement is carried out at a temperature below the freezing point of the aqueous urea solution. Here, the ultrasonic sensor cannot provide a signal because it cannot operate. If the ultrasonic sensor still provides a signal, it is considered a canning error.
Claims (8)
1. Method for identifying a filling error for a liquid in a motor vehicle, in particular for a storage tank for an aqueous urea solution, the speed of sound in the liquid is known and a filling error is identified when the speed of sound deviates from an expected value.
2. The method of claim 1, wherein canning with a poor quality urea-water solution is identified when the speed of sound is between a first threshold and a second threshold.
3. Method according to any of the preceding claims, characterized in that canning with diesel fuel is identified when the speed of sound is below a second threshold value.
4. Method according to any of the preceding claims, characterized in that when the temperature is above a threshold, a check is performed whether there is a canning error.
5. Computer program configured to implement all the steps of one of the methods according to any one of claims 1 to 4.
6. A machine-readable storage medium on which the computer program according to claim 5 is stored.
7. A controller configured to implement all the steps of one of the methods according to any one of claims 1 to 4.
8. Program code together with processing instructions for creating a computer program executable on a controller, wherein the program code, when converted into an executable computer program according to the processing instructions, results in the computer program according to claim 5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018221007.1A DE102018221007A1 (en) | 2018-12-05 | 2018-12-05 | Method for detecting incorrect refueling of a storage container in a motor vehicle |
| DE102018221007.1 | 2018-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111271165A true CN111271165A (en) | 2020-06-12 |
Family
ID=70776278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911228287.2A Pending CN111271165A (en) | 2018-12-05 | 2019-12-04 | Method for detecting a filling error of a storage container in a motor vehicle |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20200068585A (en) |
| CN (1) | CN111271165A (en) |
| DE (1) | DE102018221007A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1633586A (en) * | 2002-02-18 | 2005-06-29 | 考特克斯·特克斯罗恩有限公司及两合公司 | Method and device for optically measuring the filling level of fluid-filled containers |
| JP2006125323A (en) * | 2004-10-29 | 2006-05-18 | Nissan Diesel Motor Co Ltd | Exhaust emission control device |
| US20080280371A1 (en) * | 2007-05-12 | 2008-11-13 | Honeywell International Inc. | Acoustic resonance based urea quality sensor |
| CN103133108A (en) * | 2011-12-01 | 2013-06-05 | 罗伯特·博世有限公司 | Method for operating an exhaust gas system of an internal combustion engine |
| CN104968909A (en) * | 2013-01-30 | 2015-10-07 | 英瑞杰汽车系统研究公司 | Method for monitoring urea quality of an scr system |
| CN205559029U (en) * | 2016-03-31 | 2016-09-07 | 罗伯特·博世有限公司 | Diesel engine exhaust aftertreatment system |
-
2018
- 2018-12-05 DE DE102018221007.1A patent/DE102018221007A1/en active Pending
-
2019
- 2019-11-28 KR KR1020190155090A patent/KR20200068585A/en not_active Application Discontinuation
- 2019-12-04 CN CN201911228287.2A patent/CN111271165A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1633586A (en) * | 2002-02-18 | 2005-06-29 | 考特克斯·特克斯罗恩有限公司及两合公司 | Method and device for optically measuring the filling level of fluid-filled containers |
| JP2006125323A (en) * | 2004-10-29 | 2006-05-18 | Nissan Diesel Motor Co Ltd | Exhaust emission control device |
| US20080280371A1 (en) * | 2007-05-12 | 2008-11-13 | Honeywell International Inc. | Acoustic resonance based urea quality sensor |
| CN103133108A (en) * | 2011-12-01 | 2013-06-05 | 罗伯特·博世有限公司 | Method for operating an exhaust gas system of an internal combustion engine |
| CN104968909A (en) * | 2013-01-30 | 2015-10-07 | 英瑞杰汽车系统研究公司 | Method for monitoring urea quality of an scr system |
| CN205559029U (en) * | 2016-03-31 | 2016-09-07 | 罗伯特·博世有限公司 | Diesel engine exhaust aftertreatment system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018221007A1 (en) | 2020-06-10 |
| KR20200068585A (en) | 2020-06-15 |
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