DE102015220957A1 - Ice-proof fluid delivery module - Google Patents
Ice-proof fluid delivery module Download PDFInfo
- Publication number
- DE102015220957A1 DE102015220957A1 DE102015220957.1A DE102015220957A DE102015220957A1 DE 102015220957 A1 DE102015220957 A1 DE 102015220957A1 DE 102015220957 A DE102015220957 A DE 102015220957A DE 102015220957 A1 DE102015220957 A1 DE 102015220957A1
- Authority
- DE
- Germany
- Prior art keywords
- fluid
- pressure
- conveyor module
- pulse damper
- pressure sensor
- 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
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
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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
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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
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1446—Means for damping of pressure fluctuations in the delivery system, e.g. by puffer volumes or throttling
-
- 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
Abstract
Ein Fördermodul (2) zur Förderung eines Fluids, insbesondere zur Förderung eines fluiden Reduktionsmittels zur Abgasnachbehandlung, umfasst einen Druckpulsdämpfer (6), der zur Kompensation von Druckschwankungen des Fluids ausgebildet ist, und einen Drucksensor (14), der unmittelbar an dem Druckpulsdämpfer (6) angeordnet ist.A conveying module (2) for conveying a fluid, in particular for conveying a fluid reducing agent for exhaust gas aftertreatment, comprises a pressure pulse damper (6), which is designed to compensate for pressure fluctuations of the fluid, and a pressure sensor (14), which is located directly on the pressure pulse damper (6 ) is arranged.
Description
Die Erfindung betrifft ein eisdruckfestes Fluidfördermodul, insbesondere ein eisdruckfestes Fluidfördermodul zur Förderung eines fluiden Reduktionsmittels, das zur Abgasnachbehandlung eingesetzt wird.The invention relates to a pressure-resistant fluid conveying module, in particular a pressure-resistant fluid conveying module for conveying a fluid reducing agent, which is used for exhaust aftertreatment.
Bei Kraftwagen mit Verbrennungsmotoren, insbesondere Dieselmotoren, muss unter anderem der Schadstoff NOx reduziert werden. Eine Methode, die dabei zur Anwendung kommt, ist das Verfahren der sogenannten selektiven katalytischen Reduktion („SCR-Verfahren“), bei dem NOx unter zu Hilfenahme eines Reduktionskatalysators und eines flüssigen Reduktionsmittels, insbesondere einer wässrigen Harnstofflösung („AdBlue“®), zu N2 und H2O reduziert wird.In motor vehicles with internal combustion engines, especially diesel engines, among other things, the pollutant NO x must be reduced. One method which is used is the process of so-called selective catalytic reduction ("SCR process"), in which NO x with the aid of a reduction catalyst and a liquid reducing agent, in particular an aqueous urea solution ("AdBlue" ® ), is reduced to N 2 and H 2 O.
Das Reduktionsmittel wird von einer Fluidfördervorrichtung (Pumpe) aus einem Tank entnommen und von einer Einspritzvorrichtung, die auf dem Pumpe/Düse-Prinzip beruht, stromaufwärts des Reduktionskatalysators in die Abgasströmung des Verbrennungsmotors eingedüst. Zur Aufnahme von Druckschwankungen, die beim Betrieb der Fluidfördervorrichtung auftreten, wird ein Druckpulsdämpfer eingesetzt. The reducing agent is taken from a tank by a fluid delivery device (pump) and injected into the exhaust gas flow of the internal combustion engine upstream of the reduction catalytic converter by an injector based on the pump / nozzle principle. To accommodate pressure fluctuations that occur during operation of the fluid delivery device, a pressure pulse damper is used.
Wässrige Harnstofflösung gefriert bei Temperaturen unter –11 °C, dabei nimmt das Volumen um ca. 10 % zu. Dieser Volumenzuwachs muss innerhalb des Fördermoduls kompensiert werden, um Beschädigungen des Fördermoduls durch den Eisdruck zu verhindern.Aqueous urea solution freezes at temperatures below -11 ° C, while the volume increases by about 10%. This volume increase must be compensated within the delivery module to prevent damage to the delivery module by the ice pressure.
Dazu werden beispielsweise an geeigneten Stellen innerhalb des Fördermoduls Eisdruckkompensationselemente platziert, die ausgebildet sind, sich zu deformieren, um den Eisdruck aufzunehmen. Solche Eisdruckkompensationselemente, wie sie beispielsweise in
Es ist wünschenswert, die Eisdruckkompensation zu optimieren und insbesondere den Aufbau eines Fluidmoduls so zu vereinfachen, dass auch ohne den Einsatz von Eisdruckkompensationselementen eine ausreichende Kompensation des Volumenzuwachses gefrierenden Fluids realisiert werden kann.It is desirable to optimize the ice pressure compensation and, in particular, to simplify the construction of a fluid module such that sufficient compensation of the volume increase of freezing fluid can be realized even without the use of ice pressure compensation elements.
Gemäß einem Ausführungsbeispiel der Erfindung umfasst ein Fördermodul zur Förderung eines Fluids, insbesondere zur Förderung eines fluiden Reduktionsmittels, das zur Abgasnachbehandlung eingesetzt wird, einen Druckpulsdämpfer, der zur Aufnahme von Druckschwankungen des Fluids ausgebildet ist, und einen Drucksensor. Der Drucksensor ist unmittelbar an dem Druckpulsdämpfer angeordnet.According to one embodiment of the invention, a delivery module for delivering a fluid, in particular for delivering a fluid reducing agent which is used for exhaust aftertreatment, comprises a pressure pulse damper, which is designed to absorb pressure fluctuations of the fluid, and a pressure sensor. The pressure sensor is arranged directly on the pressure pulse damper.
Durch eine erfindungsgemäße Anordnung des Drucksensors unmittelbar am Druckpulsdämpfer werden die Volumina der Verbindungsleitungen zwischen dem Drucksensor und dem Druckpulsdämpfer auf ein Minimum reduziert. In der Folge wird auch das beim Einfrieren des Fluids zu kompensierende Volumen reduziert, so dass der Volumenzuwachs des gefrierenden Fluids von dem Druckpulsdämpfer aufgenommen werden kann. An inventive arrangement of the pressure sensor directly on the pressure pulse damper, the volumes of the connecting lines between the pressure sensor and the pressure pulse damper are reduced to a minimum. As a result, the volume to be compensated for freezing the fluid is also reduced, so that the volume increase of the freezing fluid can be absorbed by the pressure pulse damper.
Auf ein zusätzliches Eisdruckkompensationselement kann daher verzichtet werden. Der Aufbau der Fördermoduls wird vereinfacht, und das Fördermodul kann kostengünstig hergestellt werden.An additional Eisdruckkompensationselement can therefore be dispensed with. The structure of the conveyor module is simplified, and the conveyor module can be produced inexpensively.
In einem Ausführungsbeispiel umfasst der Druckpulsdämpfer einen zylinderförmig um eine Achse ausgebildeten Bereich, und der Drucksensor ist am Umfang dieses zylinderförmig ausgebildeten Bereichs angeordnet. Eine solche Struktur ermöglicht einen besonders kompakten Aufbau, bei dem der Drucksensor unmittelbar am Druckpulsdämpfer angeordnet ist.In one embodiment, the pressure pulse damper comprises a cylindrical area formed about an axis, and the pressure sensor is arranged on the circumference of this cylindrically shaped area. Such a structure allows a particularly compact construction, in which the pressure sensor is arranged directly on the pressure pulse damper.
In einem Ausführungsbeispiel weist die Fluidverbindung zwischen dem Drucksensor und dem Druckpulsdämpfer einen konstanten Querschnitt und keine Durchmessersprünge auf. Sie ist auch ohne Winkel oder Abzweigungen ausgebildet. Auf diese Weise wird erreicht, dass sich der beim Gefrieren des Fluids entstehende Eisdruck ungehindert zum Druckpulsdämpfer fortsetzen und von diesem kompensiert werden kann.In one embodiment, the fluid communication between the pressure sensor and the pressure pulse damper has a constant cross section and no diameter jumps. It is also formed without angles or branches. In this way, it is achieved that the ice pressure arising during the freezing of the fluid can continue unhindered to the pressure pulse damper and can be compensated by this.
In einem Ausführungsbeispiel ist der Drucksensor im Wesentlichen rotationssymmetrisch um eine Drucksensorachse ausgebildet, die im Wesentlichen rechtwinklig zur Achse des zylinderförmig ausgebildeten Bereichs ausgerichtet ist.In one exemplary embodiment, the pressure sensor is designed to be substantially rotationally symmetrical about a pressure sensor axis, which is aligned essentially at right angles to the axis of the cylinder-shaped region.
In einem Ausführungsbeispiel ist die Wand des zylindrischen Bereichs wenigstens teilweise elastisch ausgebildet. Auf diese Weise kann sich die Wand des zylindrischen Bereichs deformieren, um den Eisdruck bzw. den Volumenzuwachs des gefrierenden Fluids aufzunehmen.In one embodiment, the wall of the cylindrical portion is at least partially elastic. In this way, the wall of the cylindrical portion may deform to accommodate the ice pressure or increase in volume of the freezing fluid.
In einem Ausführungsbeispiel ist die Wand des zylindrischen Bereichs wenigstens teilweise aus einem Metallblech ausgebildet. Durch ein Metallblech wird eine elastische und zugleich widerstandsfähige Wand mit hoher Lebensdauer zur Verfügung gestellt.In one embodiment, the wall of the cylindrical portion is at least partially formed of a metal sheet. A metal sheet provides an elastic and durable wall with a long service life.
In einem Ausführungsbeispiel umfasst der Druckpulsdämpfer ein Element, das in der Axialrichtung des Zylinders elastisch beweglich und dadurch in der Lage ist, Druckschwankungen des Fluids im Betrieb des Fördermoduls zu kompensieren.In one embodiment, the pressure pulse damper comprises an element that is elastically movable in the axial direction of the cylinder and thereby is able to compensate for pressure fluctuations of the fluid during operation of the delivery module.
In einem Ausführungsbeispiel erstreckt sich ein Fluidkanal zum Zu- und/oder Abführen von Fluid in einem rechten Winkel zur Längsachse des zylinderförmig ausgebildeten Bereichs. Dies ermöglicht einen besonders kompakten Aufbau des Fördermoduls.In one embodiment, a fluid channel for supplying and / or discharging fluid extends at a right angle to the longitudinal axis of the cylindrically shaped region. This allows a particularly compact design of the conveyor module.
Figurenbeschreibung:Brief Description:
Die Figur zeigt eine perspektivische Schnittansicht durch einen Bereich eines Fördermoduls
Das Fördermodul
In dem Hohlraum
Der Druckpulsdämpfer
In der äußeren Hülse ist ein parallel zur Achse A bewegliches, kolbenförmig ausgebildetes Druckkompensationselement
An dem Hohlraum
Der Drucksensor
Die Fluidverbindung
Wenn sich das Fluid, dass sich in diesem Bereich zwischen dem Drucksensor
Dadurch, dass sich der Drucksensor
Aufgrund ihrer elastischen Eigenschaften kehrt die elastische Wand
Zusätzlich zur beschriebenen radialen Deformation der elastischen Wand
Aufgrund der Einwirkung des elastischen Elements
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 102011010640 A1 [0005] DE 102011010640 A1 [0005]
Claims (9)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015220957.1A DE102015220957A1 (en) | 2015-10-27 | 2015-10-27 | Ice-proof fluid delivery module |
EP16763881.6A EP3368752B1 (en) | 2015-10-27 | 2016-09-14 | Freezing pressure resistant fluid conveying module |
PCT/EP2016/071706 WO2017071875A1 (en) | 2015-10-27 | 2016-09-14 | Freezing pressure resistant fluid conveying module |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015220957.1A DE102015220957A1 (en) | 2015-10-27 | 2015-10-27 | Ice-proof fluid delivery module |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102015220957A1 true DE102015220957A1 (en) | 2017-04-27 |
Family
ID=56920732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102015220957.1A Withdrawn DE102015220957A1 (en) | 2015-10-27 | 2015-10-27 | Ice-proof fluid delivery module |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3368752B1 (en) |
DE (1) | DE102015220957A1 (en) |
WO (1) | WO2017071875A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011010640A1 (en) | 2011-02-09 | 2012-08-09 | Emitec France S.A.S | Feed unit for conveying reducing agent |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10004614A1 (en) * | 2000-02-03 | 2001-08-16 | Siemens Ag | Liquid pressure sensor esp. for detecting reducing agent solution pressure for exhaust-gas treatment in combustion engine - includes spring element for holding pressure sensor element in defined position in receptacle part for pressure sensor element |
DE10058015A1 (en) * | 2000-11-23 | 2002-05-29 | Bosch Gmbh Robert | metering valve |
DE10362140C5 (en) * | 2003-12-29 | 2015-10-08 | Cummins Ltd. | Freezer-compatible exhaust aftertreatment device for a motor vehicle |
DE102007004687B4 (en) * | 2007-01-25 | 2012-03-01 | Hydraulik-Ring Gmbh | Volume quantity dispensing unit and method for calibrating the pressure output signal volume quantity characteristic |
DE102012010980A1 (en) * | 2012-06-02 | 2013-12-05 | Hydac Electronic Gmbh | System for exhaust aftertreatment in internal combustion engines |
-
2015
- 2015-10-27 DE DE102015220957.1A patent/DE102015220957A1/en not_active Withdrawn
-
2016
- 2016-09-14 WO PCT/EP2016/071706 patent/WO2017071875A1/en unknown
- 2016-09-14 EP EP16763881.6A patent/EP3368752B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011010640A1 (en) | 2011-02-09 | 2012-08-09 | Emitec France S.A.S | Feed unit for conveying reducing agent |
Also Published As
Publication number | Publication date |
---|---|
EP3368752A1 (en) | 2018-09-05 |
EP3368752B1 (en) | 2019-07-24 |
WO2017071875A1 (en) | 2017-05-04 |
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R005 | Application deemed withdrawn due to failure to request examination |