DE102011089502A1 - Device for measuring flow rate of fluid such as aqueous urea solution, of fluid dose arrangement of combustion engine used in vehicle, has orifice and return valve that are provided in measuring conduit which is bridged with passage - Google Patents
Device for measuring flow rate of fluid such as aqueous urea solution, of fluid dose arrangement of combustion engine used in vehicle, has orifice and return valve that are provided in measuring conduit which is bridged with passage Download PDFInfo
- Publication number
- DE102011089502A1 DE102011089502A1 DE102011089502A DE102011089502A DE102011089502A1 DE 102011089502 A1 DE102011089502 A1 DE 102011089502A1 DE 102011089502 A DE102011089502 A DE 102011089502A DE 102011089502 A DE102011089502 A DE 102011089502A DE 102011089502 A1 DE102011089502 A1 DE 102011089502A1
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- Germany
- Prior art keywords
- fluid
- pressure difference
- measuring point
- measuring
- line
- 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.)
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
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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
- 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
- F01N2610/148—Arrangement of sensors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (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)
Abstract
Description
Stand der TechnikState of the art
Die Erfindung geht aus von einer Vorrichtung zur Messung der Durchflußmenge eines Fluids bzw. einem Fördermodul bzw. einem Verfahren zur Messung der Durchflußmenge eines Fluids nach der Gattung der unabhängigen Ansprüche. The invention relates to a device for measuring the flow rate of a fluid or a delivery module or a method for measuring the flow rate of a fluid according to the preamble of the independent claims.
Die
Durchflußmeßgeräte mit einer Druckdifferenzmeßstelle sind beispielsweise aus der
Offenbarung der ErfindungDisclosure of the invention
Die erfindungsgemäße Vorrichtung zur Messung der Durchflußmenge eines Fluids durch eine Fluidleitung bzw. das erfindungsgemäße Fördermodul mit einer solchen Vorrichtung bzw. das erfindungsgemäße Verfahren zur Messung der Durchflußmenge des Fluids mit den kennzeichnenden Merkmalen der unabhängigen Ansprüche haben demgegenüber den Vorteil, eine exakte Messung der Durchflußmenge zu ausgewählten Zeitpunkten zu gewährleisten, ohne in einem Normalbetrieb der betreffenden Fluidanordnung, beispielsweise des Fördermoduls oder einer Dosieranordnung mit einem solchen Fördermodul, einen Durchfluß des Fluids durch die Fluidanordnung bzw. Fluidleitung der Fluidanordnung zu behindern. Insbesondere bei Dosieranordnungen bzw. Fördermodulen im Rahmen einer nachmotorischen Zuführung eines Reduktionsmittels zur selektiven katalytischen Reduktion von Stickoxiden in Abgasen kann somit eine Durchflußmenge der wässrigen Harnstofflösung exakt überwacht werden. In vorteilhafter Weise ermöglicht dies, eine sogenannte Mengen-Abweichungs-Überprüfung durchzuführen (englische Abkürzung hierfür: „CDM“, „consumption deviation monitoring“), um sicher zu vermeiden, dass durch Falschdosierungen von Fluidmengen insbesondere bei Abgasnachbehandlungsanordnungen geförderte Fluide bzw. deren Reaktionsprodukte an unerwünschte Orte, beispielsweise in die Umgebung, gelangen. Die zuschaltbare Funktion einer Mengenmessung aufgrund von Druckabfall an einer Drosselstelle ermöglicht zudem, im Rahmen der Abgasnachbehandlung bei Brennkraftmaschinen eine entsprechende „On-Board“-Diagnose-Funktionalität bereitzustellen, wie sie sich auch in Abgas-Gesetzgebungen insbesondere in den USA (US10, US13) bereits niedergeschlagen hat.The inventive device for measuring the flow rate of a fluid through a fluid line or the delivery module according to the invention with such a device or the inventive method for measuring the flow rate of the fluid having the characterizing features of the independent claims have the advantage over, an accurate measurement of the flow rate to ensure selected points in time, without hindering in a normal operation of the relevant fluid arrangement, for example of the delivery module or a metering arrangement with such a delivery module, a flow of the fluid through the fluid assembly or fluid line of the fluid assembly. In particular, in the case of dosing arrangements or delivery modules in the context of a post-engine supply of a reducing agent for the selective catalytic reduction of nitrogen oxides in exhaust gases, a flow rate of the aqueous urea solution can thus be precisely monitored. Advantageously, this makes it possible to carry out a so-called quantity deviation check (English abbreviation for this: "CDM", "consumption deviation monitoring") in order to reliably avoid fluids produced by incorrect metering of fluid quantities, in particular in exhaust aftertreatment arrangements or their reaction products get into unwanted places, for example in the area. The switchable function of a quantity measurement due to pressure drop at a throttle point also makes it possible to provide a corresponding "on-board" diagnostic functionality as part of the exhaust gas aftertreatment in internal combustion engines, as is also the case in exhaust gas legislation, in particular in the USA (US10, US13). already knocked down.
Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der in den unabhängigen Ansprüchen angegebenen Vorrichtung bzw. des angegebenen Fördermoduls bzw. Verfahrens zur Messung einer Durchflußmenge möglich.The measures listed in the dependent claims advantageous refinements and improvements of the device specified in the independent claims or the specified delivery module or method for measuring a flow rate are possible.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description.
Die
Ausführungsformen der ErfindungEmbodiments of the invention
Die in
Die Vorrichtung
Im Normalbetrieb des Fördermoduls
Im Meßbetrieb der Meßeinrichtung
Es ist also eine Drosselstelle vorgesehen zur Zwischenschaltung in die Fluidleitung bzw. Druckleitung, so dass bei einem Strömen des Fluids bzw. der wässrigen Harnstofflösung durch die Fluidleitung und durch die Drosselstelle anhand des Druckabfalls an der Drosselstelle auf die durch die Fluidleitung strömende Durchflußmenge des Fluids geschlossen werden kann. Die Drosselstelle der Meßeinrichtung ist dabei in einer Meßleitung
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 19947198 [0002] DE 19947198 [0002]
- DE 2728250 [0003] DE 2728250 [0003]
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011089502A DE102011089502A1 (en) | 2011-12-22 | 2011-12-22 | Device for measuring flow rate of fluid such as aqueous urea solution, of fluid dose arrangement of combustion engine used in vehicle, has orifice and return valve that are provided in measuring conduit which is bridged with passage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011089502A DE102011089502A1 (en) | 2011-12-22 | 2011-12-22 | Device for measuring flow rate of fluid such as aqueous urea solution, of fluid dose arrangement of combustion engine used in vehicle, has orifice and return valve that are provided in measuring conduit which is bridged with passage |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102011089502A1 true DE102011089502A1 (en) | 2013-06-27 |
Family
ID=48575274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102011089502A Withdrawn DE102011089502A1 (en) | 2011-12-22 | 2011-12-22 | Device for measuring flow rate of fluid such as aqueous urea solution, of fluid dose arrangement of combustion engine used in vehicle, has orifice and return valve that are provided in measuring conduit which is bridged with passage |
Country Status (1)
Country | Link |
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DE (1) | DE102011089502A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3273025A1 (en) * | 2016-07-18 | 2018-01-24 | A. de Kock Holding B.V. | Laminar flow module |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2728250A1 (en) | 1977-06-23 | 1979-01-04 | Pierburg Luftfahrtgeraete | FLOW METER AND DOSING DEVICE |
DE19947198A1 (en) | 1999-10-01 | 2001-04-05 | Bosch Gmbh Robert | Device for post treating exhaust gases from IC engine comprises mixing chamber for introducing reductant and closed regulating cycle for regulating and/or controlling pressure in the reductant line |
-
2011
- 2011-12-22 DE DE102011089502A patent/DE102011089502A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2728250A1 (en) | 1977-06-23 | 1979-01-04 | Pierburg Luftfahrtgeraete | FLOW METER AND DOSING DEVICE |
DE19947198A1 (en) | 1999-10-01 | 2001-04-05 | Bosch Gmbh Robert | Device for post treating exhaust gases from IC engine comprises mixing chamber for introducing reductant and closed regulating cycle for regulating and/or controlling pressure in the reductant line |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3273025A1 (en) * | 2016-07-18 | 2018-01-24 | A. de Kock Holding B.V. | Laminar flow module |
NL2017185B1 (en) * | 2016-07-18 | 2018-01-24 | A De Kock Holding B V | Laminar flow module |
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R012 | Request for examination validly filed | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |