WO2005024196A1 - Dispositif de traitement postérieur de gaz d'échappement pour des moteurs diesel de véhicules à moteur, en particulier d'automobiles - Google Patents

Dispositif de traitement postérieur de gaz d'échappement pour des moteurs diesel de véhicules à moteur, en particulier d'automobiles Download PDF

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Publication number
WO2005024196A1
WO2005024196A1 PCT/DE2004/001847 DE2004001847W WO2005024196A1 WO 2005024196 A1 WO2005024196 A1 WO 2005024196A1 DE 2004001847 W DE2004001847 W DE 2004001847W WO 2005024196 A1 WO2005024196 A1 WO 2005024196A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
exhaust gas
housing
sensor
injection valve
Prior art date
Application number
PCT/DE2004/001847
Other languages
German (de)
English (en)
Other versions
WO2005024196B1 (fr
Inventor
Roland Meyer
Dieter Maisch
Stefan Klotz
Wolfgang Stephan
Original Assignee
Hydraulik-Ring 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 Hydraulik-Ring Gmbh filed Critical Hydraulik-Ring Gmbh
Priority to DE112004002150T priority Critical patent/DE112004002150D2/de
Priority to US10/570,166 priority patent/US20060236679A1/en
Priority to JP2006525034A priority patent/JP2007504387A/ja
Priority to EP04762688A priority patent/EP1664498A1/fr
Publication of WO2005024196A1 publication Critical patent/WO2005024196A1/fr
Publication of WO2005024196B1 publication Critical patent/WO2005024196B1/fr

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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/36—Arrangements for supply of additional fuel
    • 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
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
    • 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]
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
    • 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
    • F01N2610/1433—Pumps
    • 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
    • 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

Definitions

  • Exhaust aftertreatment device for diesel engines of vehicles preferably cars
  • the invention relates to an exhaust gas aftertreatment device for diesel engines of vehicles, preferably cars, according to the preamble of claim 1.
  • Such exhaust gas aftertreatment devices are mainly used in trucks to treat the exhaust gases generated by the diesel engines so that the nitrogen oxides (NO, N0 2 ) are at least partially bound.
  • a pump is provided which conveys a 32.5% urea-water solution as an exhaust gas aftertreatment medium from a storage tank and feeds it to the injection valve under a certain pressure. It doses the required amount of urea-water solution into a pressure-controlled air flow. It is taken from the vehicle electrical system for trucks. For a car, the compressed air must be provided via a separate air compressor. The air flow entrains the injected urea-water solution.
  • the resulting emulsion is fed through an aerosol line to the injection nozzle on the exhaust pipe, where it is injected into the exhaust pipe in front of the catalytic converter.
  • the controls, the various sensors, the injection nozzle on the exhaust pipe or the pumps are sometimes far apart. Therefore, these individual components must be linked via a cable harness and the cables to all of these components must be pulled. Often the cables have to be routed near the exhaust, where the temperatures are high.
  • the invention has for its object to design the generic exhaust gas aftertreatment device so that it can be easily installed in the vehicle with a simple structure.
  • At least the pump and the control are combined to form one installation unit.
  • the complex laying of cables between these components can be omitted, so that the device can be easily installed.
  • the invention is explained in more detail using an exemplary embodiment shown in the drawing.
  • the drawing shows an exhaust gas aftertreatment device according to the invention in a schematic representation.
  • the nitrogen oxides (NO, N0 2 ) are reduced by a catalytic converter for the exhaust aftertreatment of diesel engines in trucks and passenger cars.
  • a solution is used for this, which is introduced into the exhaust gas flow of the diesel engine.
  • 32.5% urea-water solution, which is accommodated in a storage container 1, is advantageously used as the solution. It is located in a tank 2 for diesel fuel.
  • a discharge line 3 projects into the storage container 1 and is advantageously connected to a filter 4 within the storage container 1.
  • the discharge line 3 passes through seals the reservoir 1 and is connected to a line 5 on the wall of the tank 2. It branches to a pump block 6, which has two pump units 7 and 8 connected in parallel.
  • a check valve 9, 10, which prevents the medium from flowing back into the reservoir 1, is connected upstream of both pump units 7, 8.
  • the two pump units 7, 8 are connected to an electrical / electronic control 11.
  • the medium With the pump units 7, 8, the medium is fed via an outlet line 12, 13 to a delivery line 14, in which the medium reaches a switching valve 15.
  • a switching valve 15 In each of the outlet lines 12, 13 there is a check valve 16, 17 which blocks against the pump units 7, 8.
  • the switching valve 15 is also connected to the controller 11.
  • the pressure of the medium in the delivery line 14 is monitored by a pressure sensor 18 which is connected to the controller 11.
  • the switching valve 15 assumes its blocking position, so that the medium cannot get in the direction of a throttle point 20 provided on an exhaust pipe 19.
  • the throttle point 20 is part of an injection valve 25, with which the exhaust gas treatment medium can be injected into the exhaust pipe 19.
  • the exhaust gases flowing through the exhaust pipe 19 take up the sprayed-in exhaust gas treatment medium.
  • the switching valve 15, controlled by the controller 11 is switched to its open position, the exhaust gas aftertreatment medium flows from the delivery line 14 through the switching valve 15 into a delivery line 21, which is advantageously designed as an expansion hose.
  • the delivery line 21 is connected to the throttle valve 20.
  • the temperature of the exhaust gas in the exhaust pipe 19 is measured by a temperature sensor 22, which is connected to the controller 11 via a bus 23, preferably a CAN bus.
  • the delivery line 21 is preferably heatable.
  • a heating device 24 is provided, which can be provided on the delivery line 21 or can be integrated into it. This heating device 24 is also connected to the controller 11.
  • the injection valve 25 can optionally be provided with a check valve 26 which blocks against the delivery line 21.
  • the functional safety of the injection valve 25 is improved by the check valve 26.
  • the electrical system 27 of the motor vehicle is connected to the controller 11.
  • the controller 11 sits on a housing 28 in which the pump 6, its pressure sensor 18 and the switching valve 15 are accommodated.
  • the housing 28 itself is part of an installation unit 31, which in turn is part of a metering unit 29, which is indicated in the drawing by a dashed line.
  • the metering unit 29 contains, in addition to the installation unit 31 with the control 11, the injection valve 25.
  • the essential components of the metering unit 29 are accommodated in the housing 28, long cable runs to the individual components of the aftertreatment device can be dispensed with.
  • the control 11 itself is provided on the housing 28 and can optionally also be integrated into the housing 28.
  • the essential components of the aftertreatment device are arranged very close together. In the housing 28, these parts are protected from destruction, for example by frost.
  • the electrically heatable expansion hose 21 leads from the housing 28 of the metering or installation unit 31 to the injection valve 25 at the injection point on the exhaust pipe 19.
  • the exhaust gas treatment medium is metered into the exhaust gas flowing in the exhaust pipe 19 via the injection valve 25.
  • the additional volume occurring due to the freezing process can be pressed into the exhaust pipe 19 via the injection valve 25 if it is not taken up by the heatable expansion hose 21.
  • a pump magnet coil of the pump 6 can be energized continuously without the pump delivering.
  • the associated heating can be used to thaw the installation unit 31. This eliminates the need for a separate connection to the vehicle cooling system, which would otherwise be necessary for thawing.
  • the expansion hose 21 is heated in the manner described, so that the exhaust gas treatment medium flowing through the expansion hose is heated.
  • the injection valve 25 is also heated to such an extent that any frozen exhaust gas treatment medium may thaw. The most If the injector 25 is provided, the injector 30 can be reliably heated in this way so that it does not freeze up.
  • the pump 6 can be used as a heating element in the manner described by continuously energizing its magnet coil, so that the medium frozen in the pump is thawed.
  • the installation unit 31 with the housing 28 is advantageously mounted directly on the tank 2, so that an additional external suction line for the exhaust gas treatment medium is not required.
  • the exhaust gas aftertreatment device is advantageously provided for passenger vehicles in which a compressed air network - in contrast to trucks - is not available, the exhaust gas treatment medium can be metered into the exhaust gas stream in the exhaust pipe 19 without problems in the manner described.
  • the exhaust gas aftertreatment device described is frost-proof, has a compact design and is inexpensive to produce. The device can also be used for trucks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Dispositif de traitement postérieur de gaz d'échappement pour des moteurs diesel de véhicules à moteur, en particulier d'automobiles. Ledit dispositif comporte une pompe (6) pour le milieu de traitement postérieur de gaz d'échappement, des capteurs (18, 22), une soupape d'injection (25) et un mécanisme de commande (11) pour la pompe (6), les capteurs (18, 22) et la soupape d'injection (25). Ces éléments structuraux se trouvent, dans l'espace, en partie loin les uns des autres, si bien qu'ils doivent être reliés à l'aide d'un faisceau de câbles. En outre, les câbles doivent souvent être posés à proximité du pot d'échappement où règnent des températures élevées. Selon la présente invention, pour que ledit dispositif possède une structure simple et soit facile à monter, tout au moins la pompe (6) et le mécanisme de commande (11) sont réunis en une seule unité de montage. La pose compliquée de câbles entre les composants devient donc superflue. Ce dispositif est utilisé pour les moteurs diesel.
PCT/DE2004/001847 2003-09-02 2004-08-19 Dispositif de traitement postérieur de gaz d'échappement pour des moteurs diesel de véhicules à moteur, en particulier d'automobiles WO2005024196A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE112004002150T DE112004002150D2 (de) 2003-09-02 2004-08-19 Abgasnachbehandlungseinrichtung für Dieselmotoren von Fahrzeugen, vorzugsweise von PKWs
US10/570,166 US20060236679A1 (en) 2003-09-02 2004-08-19 Exhaust gas aftertreatment device for diesel engines of vehicles, preferably passenger cars
JP2006525034A JP2007504387A (ja) 2003-09-02 2004-08-19 車両、特に乗用車のディーゼルエンジンのための排ガス後処理装置
EP04762688A EP1664498A1 (fr) 2003-09-02 2004-08-19 Dispositif de traitement post rieur de gaz d' chappement pour des moteurs diesel de v hicules moteur, en particulier d'automobiles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10341996A DE10341996A1 (de) 2003-09-02 2003-09-02 Abgasnachbehandlungseinrichtung für Dieselmotoren von Fahrzeugen, vorzugsweise von PKWs
DE10341996.9 2003-09-02

Publications (2)

Publication Number Publication Date
WO2005024196A1 true WO2005024196A1 (fr) 2005-03-17
WO2005024196B1 WO2005024196B1 (fr) 2005-05-12

Family

ID=34202410

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2004/001847 WO2005024196A1 (fr) 2003-09-02 2004-08-19 Dispositif de traitement postérieur de gaz d'échappement pour des moteurs diesel de véhicules à moteur, en particulier d'automobiles

Country Status (6)

Country Link
US (1) US20060236679A1 (fr)
EP (1) EP1664498A1 (fr)
JP (1) JP2007504387A (fr)
CN (1) CN1846043A (fr)
DE (2) DE10341996A1 (fr)
WO (1) WO2005024196A1 (fr)

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JP2010506076A (ja) * 2006-10-04 2010-02-25 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 還元剤を貯蔵するためのタンク

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DE102005032823A1 (de) * 2005-07-12 2007-01-18 Eichenauer Heizelemente Gmbh & Co. Kg Tankheizung
DE102005037201A1 (de) * 2005-08-06 2007-02-22 Eichenauer Heizelemente Gmbh & Co. Kg Heizsystem
DE102007004687B4 (de) 2007-01-25 2012-03-01 Hydraulik-Ring Gmbh Volumensmengenabgabeeinheit und Verfahren zur Kalibrierung der Druckausgangssignal-Volumensmenge-Charakteristik
DE102007017458A1 (de) * 2007-04-03 2008-10-09 Daimler Ag Verfahren zum Heizen eines Reduktionsmitteldosierventils bei einem SCR-System zur Abgasnachbehandlung eines Verbrennungsmotors
DE102007024782B4 (de) * 2007-05-26 2011-08-25 Eichenauer Heizelemente GmbH & Co. KG, 76870 Heizeinsatz und dessen Verwendung in einem Harnstoffversorgungssystem
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DE102008012780B4 (de) 2008-03-05 2012-10-04 Hydraulik-Ring Gmbh Abgasnachbehandlungseinrichtung
DE102009023325B4 (de) * 2008-12-10 2012-01-26 Continental Automotive Gmbh Verfahren zur Adaption der Injektionsmittelzufuhr in einem Injektionssystem
DE102009035940C5 (de) 2009-08-03 2017-04-20 Cummins Ltd. SCR-Abgasnachbehandlungseinrichtung
DE102010030343A1 (de) 2010-06-22 2011-12-22 Robert Bosch Gmbh Vorrichtung und Verfahren zur Eindosierung einer Flüssigkeit in den Abgasstrang einer Brennkraftmaschine
DE102010061222B4 (de) 2010-12-14 2015-05-07 Cummins Ltd. SCR-Abgasnachbehandlungseinrichtung
DE102011053053B4 (de) * 2011-08-26 2023-06-15 Cummins Ltd. Fluidleitung
DE102012204107A1 (de) 2012-03-15 2013-09-19 Robert Bosch Gmbh Dosiervorrichtung
US8607625B2 (en) * 2012-05-10 2013-12-17 GM Global Technology Operations LLC Service test for exhaust gas treatment system
DE102013101720B4 (de) 2013-02-21 2015-02-12 Bernd Giegerich Schutzelement zur Vermeidung von Frostschäden
DE102013102101A1 (de) * 2013-03-04 2014-09-18 Emitec France S.A.S Verfahren zum Betriebsstart einer Vorrichtung zur Bereitstellung eines flüssigen Additivs
CN105863786A (zh) * 2016-04-11 2016-08-17 安徽康成工业产品设计有限公司 一种汽车尾气用管式净化装置
CN107461244B (zh) * 2016-06-06 2023-06-09 天纳克（苏州）排放系统有限公司 集成装置、尾气后处理系统以及控制方法
CN114439578A (zh) * 2020-10-30 2022-05-06 长城汽车股份有限公司 尿素喷嘴、尿素喷射系统和车辆

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US6082102A (en) * 1997-09-30 2000-07-04 Siemens Aktiengesellschaft NOx reduction system with a device for metering reducing agents
US6192676B1 (en) * 1998-02-25 2001-02-27 Siemens Aktiengesellschaft Device for reducing the NOx content in the exhaust gas of an internal combustion engine
WO2003016687A1 (fr) * 2001-08-09 2003-02-27 Robert Bosch Gmbh Systeme de dosage d'un agent de reduction destine au post-traitement de gaz d'echappement
WO2003052357A1 (fr) * 2001-12-18 2003-06-26 Siemens Aktiengesellschaft Dispositif permettant de determiner le niveau d'un liquide dans un recipient
EP1435458A1 (fr) * 2002-12-23 2004-07-07 Grundfos a/s Unité de pompe de dosage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010506076A (ja) * 2006-10-04 2010-02-25 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 還元剤を貯蔵するためのタンク
JP4801202B2 (ja) * 2006-10-04 2011-10-26 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 還元剤を貯蔵するためのタンク

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EP1664498A1 (fr) 2006-06-07
DE112004002150D2 (de) 2006-07-13
US20060236679A1 (en) 2006-10-26
CN1846043A (zh) 2006-10-11
JP2007504387A (ja) 2007-03-01
WO2005024196B1 (fr) 2005-05-12

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