WO2009010569A1 - Dispositif et procédé pour doser un agent de réduction dans un circuit d'échappement d'un véhicule - Google Patents

Dispositif et procédé pour doser un agent de réduction dans un circuit d'échappement d'un véhicule Download PDF

Info

Publication number
WO2009010569A1
WO2009010569A1 PCT/EP2008/059412 EP2008059412W WO2009010569A1 WO 2009010569 A1 WO2009010569 A1 WO 2009010569A1 EP 2008059412 W EP2008059412 W EP 2008059412W WO 2009010569 A1 WO2009010569 A1 WO 2009010569A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
reducing agent
line
conduit
metering
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.)
Ceased
Application number
PCT/EP2008/059412
Other languages
German (de)
English (en)
Inventor
Peter Bauer
Rainer Bentz
Joachim Frank
Hermann Ketterl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aumovio Germany GmbH
Original Assignee
Continental Automotive Technologies GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Continental Automotive Technologies GmbH filed Critical Continental Automotive Technologies GmbH
Publication of WO2009010569A1 publication Critical patent/WO2009010569A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • 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
    • 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
    • F01N2610/1473—Overflow or return means for the substances, e.g. conduits or valves for the return path
    • 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
    • F01N2900/1811—Temperature
    • 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 an apparatus and a method for metering a reducing agent, such as a urea solution, into an exhaust tract of a vehicle.
  • a reducing agent such as a urea solution
  • This reducing agent is today usually produced by injection of a urea-water solution, such as AdBlue, Denoxium, etc., and its hydrolysis in the exhaust system of the internal combustion engine or "on board” of the respective vehicle and then fed to the SCR catalyst
  • a urea-water solution such as AdBlue, Denoxium, etc.
  • the reductant represents a challenge in terms of robustness, reliability and cost-effectiveness.
  • a urea dosing device comprises a reservoir for the reducing agent. This is connected via a first line with a 2/2-way valve, which introduces the reducing agent in the exhaust system. Between the reservoir and the metering valve, a pump and then a filter is arranged. The pump pumps the reducing agent to the exhaust gas tract, wherein the reducing agent is metered into the exhaust tract via the actuation of the metering valve.
  • the pump is designed such that it can also transport the reducing agent from the metering valve back into the storage container. This makes it possible to pump the reducing agent in the first line back into the reservoir and to empty the first line completely.
  • a second line is provided, which is switchable via a 2/2-way valve. If, during operation of the pump, an excess of reducing agent is transported via the first line to the valve and as a result excessively high pressure results, the valve in the second line is opened to reduce the pressure and an excess flow of reducing agent can be applied via the second line Return the line to the storage tank.
  • a metering system is known from DE 10 2004 054 238 A1.
  • the metering system has a storage tank with a urea solution as a reducing agent.
  • the pros Ratstank is connected via a line with a pump, various filters and a metering valve, via which the reducing agent is metered into a metering point of a Abgaseinlass Schemes a catalyst.
  • an area of the delivery line between the feed pump and the metering valve opposite to the normal operation conveying direction can be emptied. In this case, the conveying direction of the feed pump is reversed and the urea solution is conveyed back into the storage tank counter to the usual normal operation in the conveying direction.
  • a vent valve located upstream of the metering valve is opened and the metering valve is closed.
  • DE 199 47 197 A1 discloses a device for metering in a reducing agent by means of a metering valve device into an exhaust gas tract of a vehicle.
  • a reservoir containing the reducing agent.
  • the reservoir is connected via a first line with a metering valve device.
  • a filter element and then a pump device is provided in the first line.
  • DE 100 47 516 A1 discloses a method and a device for dosing a reducing agent for the removal of
  • Nitrogen oxides from the exhaust gases known.
  • the reducing agent is arranged in a storage container and is fed via a line by means of a pump to a metering device. leads. Parallel to the pump, a return line is provided, in which a check valve is arranged.
  • the object of the invention is therefore to provide a metering device and a method which allows an improved pressure reduction.
  • this object is achieved by providing a method and a metering device for metering in a reducing agent, in which a first line connects a storage container with a metering valve device.
  • a filter device is arranged in the first line and then a pump device.
  • a pressure relief device such as a valve device, is connected to the first line in such a way that pressure can be released from the first line.
  • At least one temperature sensor device is provided, which determines, for example, the temperature of the reducing agent in the first line, the reservoir and / or an ambient temperature. This temperature determination can additionally or alternatively be used to determine the pressure in order to control the pressure relief device accordingly.
  • the pressure relief device can be opened at low temperatures to minimize ice pressure in the system.
  • Pump device or upstream thereof is arranged that the pump means and the metering device not so can easily clog and thereby a reliable operation of the metering device is ensured.
  • the pressure relief device is connected on the one hand to the reservoir and on the other hand to the first line to the pump means. This has the advantage that, for example, during freezing of the reducing agent in the reservoir, this can be pumped back into the reservoir through circular pumping via the valve device in order to counteract freezing.
  • the pressure relief device is connected on the one hand with the first line in front of the filter device and on the other hand with the first line following the pump device.
  • the pressure relief device is connected on the one hand to the first line after the filter device and on the other hand to the first line following the pump device.
  • the pump device for example, a pump which promotes only in one direction, for example, a diaphragm pump. Since the pressure reduction takes place via the valve device, a pump device with two delivery directions is not necessary.
  • a pressure sensor device is provided in the first line, for example between the pump device and the metering device.
  • the Pressure sensor device determines the pressure in the first line by means of at least one pressure sensor in order to release pressure via the pressure-lowering device if one or more staggered reference values are exceeded.
  • At least one heating device is provided on the first conduit and / or the reservoir.
  • the reducing agent can be additionally heated to prevent freezing in frost.
  • FIG. 1 is a schematic view of a metering device according to a first embodiment of the invention
  • FIG. 2 is a schematic view of a metering device according to a second embodiment of the invention
  • FIG. 3 is a schematic view of a metering device according to a third embodiment of the invention
  • Fig. 5 is a side perspective view of the dosing device according to the second embodiment.
  • a first embodiment of the dosing device 10 is shown.
  • the metering device 10 is connected to a reservoir 12 for a reducing agent 14, such as a urea-water solution or an ammonia solution.
  • a suction device 16 such as an intake pipe or tank tube, is provided, which is connected via a first line 18 with a metering valve device 20.
  • the dosing Valve device 20 is arranged, for example, on an exhaust gas tract of a motor vehicle (not shown) in order to meter reducing agent 14 into the exhaust gas tract of a motor vehicle, for example into the exhaust gas inlet region of a catalytic converter.
  • the metering valve device 20 can also inject the reducing agent via an injector into a generator instead of directly into the exhaust gas tract.
  • the reducing agent 14, such as a urea solution, thereby causing toxic nitrogen oxides in the exhaust gas can be converted to nitrogen.
  • a filter element 22 is initially provided in the first line 18 and then a pump device 24 thereafter.
  • the filter element 22 serves, for example, to filter out existing solid particles or crystals, for example to prevent clogging of the pump device 24 and the metering valve device 20.
  • the pumping device 24 in this case transports the reducing agent 14 in one direction, i. from the reservoir 12 to the metering valve device 20.
  • a diaphragm pump can be used as a pump device 24.
  • the reducing agent 14 can also promote back into the reservoir 12.
  • the pressure in the first line 18 is determined via a pressure sensor device 26 which is arranged, for example, between the pump device 24 and the metering valve device 20.
  • a pressure sensor device 26 which is arranged, for example, between the pump device 24 and the metering valve device 20.
  • at least one pressure sensor can be provided.
  • at least one temperature sensor may also be provided which measures, for example, the temperature in the first conduit 18, the reservoir 12 and / or an ambient temperature. In this way, it can be determined whether, for example, the reducing agent 14 is freezing. In particular, urea solution tends to freeze relatively quickly. When freezing expands the reducing agent 14, since it is a liquid, so that the pressure in the first conduit 18 increases.
  • a pressure relief device 28 is provided according to the invention, which may have, for example, a valve device 28.
  • the valve device may, for example, have at least a 2/2-way valve or another suitable valve.
  • the pressure relief device optionally also have a throttle, to name just another example of the design of a pressure relief device.
  • the invention is not limited to this example. It will be apparent to one of ordinary skill in the art that there are a variety of other possible configurations for a pressure relief device that can be used to vent pressure from a conduit.
  • valve device 28 as an example of a pressure relief device.
  • This valve device 28 is in the first embodiment, as shown in Fig. 1, on the one hand connected via a second line 30 to the reservoir 12 and the other with the first line 18 following the pump means 24.
  • Sets, for example, in the winter freezing the urea solution so the urea solution expands in the first line 18 and can damage the line during further freezing.
  • the additional valve device 28 is opened accordingly.
  • a portion of the reducing agent 14 can be discharged back into the reservoir 12 in this case. This has the advantage that destruction of the components of the dosing device 10 can be prevented when freezing occurs.
  • the pressure drop construction in the dosing device 10 are made variable and thereby also the components of the dosing device 10 are spared.
  • Circulation pumping of the reducing agent 14 during thawing is possible. This means that pumped liquid reducing agent 14 can be pumped back into the reservoir 12 and there again thawing of further reducing agent 14 causes. This has the advantage that the thawing time can be reduced.
  • valve device 28 is used to cause a pressure reduction when the pressure sensor and / or temperature sensor means 26, 32 determines that the pressure threatens to be too high at least in the first line 18 , It can be dispensed with a special pump device with which the reducing agent 14 is pumped back into the reservoir 12. A pumping device which therefore pumps only in one direction, i. from the reservoir 12 to the metering valve device 20 is sufficient.
  • a second dosing device 10 differs from the dosing device 10 of the first embodiment in that the additional valve device 28 is connected via a second line 30 once with the first line 18 in front of the filter element 22 and once with the first line 18 to the pump device 24. Dies has the advantage that no additional connection to the reservoir 12 has to be created. Furthermore, in the second embodiment, to lower the pressure, the pump means 24 and the filter element 22 can be bypassed, the valve means 28 need not be attached in the vicinity or directly to the reservoir 12, but Also be provided spaced therefrom, as will be explained below with reference to FIGS. 4 and 5.
  • FIG. 3 furthermore shows a third embodiment of the dosing device 10 according to the invention.
  • the additional valve device 28 is connected via a second line 30 once with the first line 18 to the filter element 22 and once with the first line 18 following the pump means 24. This arrangement in which the valve means 28 parallel to the pump means
  • the filter element 22 can be rinsed. This is done by reducing reducing agent 14 via the valve device 28 in order to reduce the pressure in the first line 18. In this case, the reducing agent 14 flows back through the filter element 22 and rinses it in this case.
  • Another advantage of the second and third embodiments is that the components need not all be mounted to the reservoir 12, such as the additional valve means 28, but may be mounted at other locations outside of the reservoir 12.
  • the valve device 28 can also be used as a kind of heating for adjacent parts.
  • FIGS. 4 and 5 show an example of the second embodiment according to the invention.
  • a tank extraction pipe 34 is shown, which is introduced into a storage container.
  • the reservoir has been omitted for reasons of clarity. Only the tank wall 36 of the reservoir is shown.
  • the tank removal tube 34 is provided with a heating device in order to heat up the reducing agent, such as the urea solution, at low temperatures in winter and to prevent freezing.
  • a first line 18 is connected to the tank extraction pipe 34.
  • a filter element 22 is arranged downstream of the tank extraction pipe 34 and subsequently a pump device 24 for pumping the reducing agent from the reservoir to the metering valve device 20.
  • the additional pressure relief device or here valve device 28 is not attached to the reservoir but provided spaced therefrom to other components.
  • valve device 28 of the first embodiment which is arranged on the tank wall 36 of the storage container, is shown purely schematically in FIGS. 4 and 5 as well. However, this is not mandatory. In principle, the valve device 28 may also be mounted in a different position than the storage container in the first embodiment.
  • valve device 28 and its connection with the first line 18 may be included for the diagnosis of the filter element state, the system tightness and / or the pump malfunction.
  • the pressure reduction is slowed down, that the filter element 22 may be damaged or clogged, since the reducing agent 14 does not flow back optimally through the filter element 22.
  • about the circular pumping, as has been described with reference to the first embodiment can, for example, on the
  • valve device 28 can also be included, for example for diagnosing the system with respect to freezing, thawing and / or system emergency operations.
  • reducing means 14 can be circulated via the valve device 28, for example in freezing or thawing phases.
  • valve device 28 is merely an example of a pressure relief device.
  • the statements made above on the valve device 28 therefore also apply correspondingly to any other form of pressure relief device.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (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

L'invention concerne un dispositif pour doser un agent de réduction, tel qu'une solution d'urée, dans un circuit d'échappement d'un véhicule. L'objectif de l'invention est de créer un dispositif de dosage permettant d'améliorer l'établissement de pression. Cet objectif est atteint grâce à un dispositif de dosage (10) servant à doser un agent de réduction au moyen d'un système de soupape de dosage (20) dans un circuit d'échappement d'un véhicule, ce dispositif comprenant un réservoir (12) contenant l'agent de réduction (14), ainsi qu'une première conduite (18) qui relie le réservoir et le système de soupape de dosage et dans laquelle sont disposés un système de filtration et un système de pompage (24) adjacent. Un système d'évacuation de pression (28) est relié à la première conduite pour évacuer la pression de celle-ci.
PCT/EP2008/059412 2007-07-18 2008-07-17 Dispositif et procédé pour doser un agent de réduction dans un circuit d'échappement d'un véhicule Ceased WO2009010569A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007033470A DE102007033470B4 (de) 2007-07-18 2007-07-18 Vorrichtung und Verfahren zur Dosierung eines Reduktionsmittels in einen Abgastrakt eines Fahrzeugs
DE102007033470.4 2007-07-18

Publications (1)

Publication Number Publication Date
WO2009010569A1 true WO2009010569A1 (fr) 2009-01-22

Family

ID=39855442

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/059412 Ceased WO2009010569A1 (fr) 2007-07-18 2008-07-17 Dispositif et procédé pour doser un agent de réduction dans un circuit d'échappement d'un véhicule

Country Status (2)

Country Link
DE (1) DE102007033470B4 (fr)
WO (1) WO2009010569A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012103695A1 (de) 2012-04-26 2013-10-31 Cummins Ltd. Abgasnachbehandlungseinrichtung und Verfahren
US8938949B2 (en) 2009-08-03 2015-01-27 Cummins Ltd. SCR exhaust gas aftertreatment device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5437890B2 (ja) * 2010-04-07 2014-03-12 日野自動車株式会社 後処理バーナシステムの燃料凍結防止方法及び装置
FR2965856B1 (fr) * 2010-10-12 2017-03-24 Peugeot Citroen Automobiles Sa Procede de controle du fonctionnement d'un systeme de post-traitement des gaz d'echappement d'un moteur et vehicule adapte pour la mise en œuvre du procede
DE102011078526B4 (de) 2011-07-01 2024-08-08 Robert Bosch Gmbh Dosiersystem für eine Flüssigkeit, insbesondere eine Harnstoff-Wasser-Lösung
DE102011078657A1 (de) * 2011-07-05 2013-01-10 Robert Bosch Gmbh Dosiersystem sowie 3/2-Wegeventil für ein Dosiersystem
US10590823B2 (en) 2018-01-24 2020-03-17 Tenneco Automotive Operating Company Inc. Systems and methods for improving injector accuracy

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19947198A1 (de) * 1999-10-01 2001-04-05 Bosch Gmbh Robert Vorrichtung zum Nachbehandeln von Abgasen einer Brennkraftmaschine
WO2004047963A1 (fr) * 2002-11-26 2004-06-10 Robert Bosch Gmbh Dispositif permettant d'éliminer un agent de réduction d'un appareil de post-traitement des gaz d'échappement d'un moteur à combustion interne
US20050252201A1 (en) * 2004-05-17 2005-11-17 Lecea Oscar A Method and apparatus for reducing NOx emissions
DE102004048075A1 (de) * 2004-10-02 2006-04-06 Robert Bosch Gmbh Dosiersystem zur Schadstoffreduktion in Kraftfahrzeugabgasen
WO2006074833A1 (fr) * 2005-01-17 2006-07-20 Robert Bosch Gmbh Procede et dispositif pour le post-traitement de gaz d'echappement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19947197A1 (de) * 1999-10-01 2001-04-12 Bosch Gmbh Robert Vorrichtung und Verfahren zur Dosierung eines Reduktionsmittels
DE10047516A1 (de) * 2000-09-22 2002-04-18 Bosch Gmbh Robert Verfahren und Vorrichtung zur Dosierung eines Reduktionsmittels zur Entfernung von Stickoxiden aus Abgasen
DE102004054238A1 (de) * 2004-11-10 2006-05-11 Robert Bosch Gmbh Dosiersystem sowie Verfahren zum Betreiben eines Dosiersystems
AT500849B8 (de) * 2004-11-15 2007-02-15 Pankl Emission Control Systems Harnstoffdosiervorrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19947198A1 (de) * 1999-10-01 2001-04-05 Bosch Gmbh Robert Vorrichtung zum Nachbehandeln von Abgasen einer Brennkraftmaschine
WO2004047963A1 (fr) * 2002-11-26 2004-06-10 Robert Bosch Gmbh Dispositif permettant d'éliminer un agent de réduction d'un appareil de post-traitement des gaz d'échappement d'un moteur à combustion interne
US20050252201A1 (en) * 2004-05-17 2005-11-17 Lecea Oscar A Method and apparatus for reducing NOx emissions
DE102004048075A1 (de) * 2004-10-02 2006-04-06 Robert Bosch Gmbh Dosiersystem zur Schadstoffreduktion in Kraftfahrzeugabgasen
WO2006074833A1 (fr) * 2005-01-17 2006-07-20 Robert Bosch Gmbh Procede et dispositif pour le post-traitement de gaz d'echappement

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8938949B2 (en) 2009-08-03 2015-01-27 Cummins Ltd. SCR exhaust gas aftertreatment device
DE102009035940C5 (de) * 2009-08-03 2017-04-20 Cummins Ltd. SCR-Abgasnachbehandlungseinrichtung
DE102012103695A1 (de) 2012-04-26 2013-10-31 Cummins Ltd. Abgasnachbehandlungseinrichtung und Verfahren
DE102012103695B4 (de) * 2012-04-26 2025-05-22 Cummins Ltd. Abgasnachbehandlungseinrichtung und Verfahren

Also Published As

Publication number Publication date
DE102007033470B4 (de) 2012-10-25
DE102007033470A1 (de) 2009-01-22

Similar Documents

Publication Publication Date Title
DE102009037564B4 (de) Vorrichtung und Verfahren zur Dosierung eines Reduktionsmittels in einen Abgastrakt einer Brennkraftmaschine
EP1841956B1 (fr) Procede et dispositif pour le post-traitement de gaz d'echappement
EP1999347B1 (fr) Procede de systeme de dosage en vue de la reduction des substances nocives dans les gaz d'echappement d'un vehicule automobile
EP1812144B1 (fr) Systeme de dosage et procede pour faire fonctionner ce dernier
EP2791481B1 (fr) Système de dosage pour un produit liquide de retraitement des gaz d'échappement et procédé de dosage
EP2094953B1 (fr) Dispositif de dosage d'agent de réduction liquide
DE102012209538B4 (de) Verfahren und Vorrichtung zum Überprüfen der Funktionstüchtigkeit von Hydraulikkomponenten in einem Abgasnachbehandlungssystem für ein Kraftfahrzeug
EP2791480B1 (fr) Système de dosage pour un agent de retraitement de gaz d'échappement liquide et procédé de dosage
DE102007033470B4 (de) Vorrichtung und Verfahren zur Dosierung eines Reduktionsmittels in einen Abgastrakt eines Fahrzeugs
WO2015091630A1 (fr) Procédé servant à vérifier un capteur de température dans un système scr de retraitement des gaz d'échappement
WO2011064076A1 (fr) Procédé permettant de faire fonctionner un dispositif de transport d'un agent de réduction
WO2009121644A1 (fr) Dispositif de dosage d'un agent de réduction liquide
EP2669484B1 (fr) Système d'injection, dispositif de post-traitement des gaz d'échappement
EP1761690B1 (fr) Systeme a soupape de dosage et procede pour faire fonctionner un tel systeme
DE102009011018A1 (de) Vorrichtung zum Zuführen eines Hilfsmittels zu einer Abgasnachbehandlungseinrichtung eines Kraftfahrzeugs
DE102008042954A1 (de) Dosiersystem für ein flüssiges Medium, insbesondere Harnstoff-Wasser-Lösung
DE102014226749A1 (de) Verfahren und Vorrichtung zum Überprüfen eines Heizsystems in einem SCR-Abgasnachbehandlungssystem
DE102015208565A1 (de) Hydraulisches Förder- und Dosiersystem und Verfahren zum Betreiben des hydraulischen Förder- und Dosiersystems
DE102006061734A1 (de) Vorrichtung zum Dosieren eines Reduktionsmittels
DE102011087288A1 (de) Abgasnachbehandlungssystem und Verfahren zum Einbringen eines Reduktionsmittels in einen Abgaskanal einer Brennkraftmaschine
DE102013212732B4 (de) Verfahren zum Betreiben eines hydraulischen Förder- und Dosiersystems
DE102006033027B4 (de) Verfahren zum Betreiben einer Dosiereinrichtung eines SCR-Katalysators
WO2006045671A1 (fr) Dispositif de dosage et procede d'exploitation d'un dispositif de dosage
DE102019125242A1 (de) Verfahren zum Betreiben eines Dosiersystems zur Eindosierung eines Reduktionsmittels sowie Dosiersystem
DE102018127656A1 (de) Steuergerät für eine interne verbrennungsmaschine

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08775192

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08775192

Country of ref document: EP

Kind code of ref document: A1