WO2007020023A1 - Procede et dispositif de reduction catalytique selective d'oxydes d'azote dans des gaz d'echappement de moteur a combustion interne - Google Patents

Procede et dispositif de reduction catalytique selective d'oxydes d'azote dans des gaz d'echappement de moteur a combustion interne Download PDF

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Publication number
WO2007020023A1
WO2007020023A1 PCT/EP2006/007972 EP2006007972W WO2007020023A1 WO 2007020023 A1 WO2007020023 A1 WO 2007020023A1 EP 2006007972 W EP2006007972 W EP 2006007972W WO 2007020023 A1 WO2007020023 A1 WO 2007020023A1
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WO
WIPO (PCT)
Prior art keywords
reducing agent
selective catalytic
exhaust gas
nitrogen oxides
catalytic reduction
Prior art date
Application number
PCT/EP2006/007972
Other languages
German (de)
English (en)
Inventor
Rolf BRÜCK
Original Assignee
Emitec Gesellschaft Für Emissionstechnologie Mbh
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 Emitec Gesellschaft Für Emissionstechnologie Mbh filed Critical Emitec Gesellschaft Für Emissionstechnologie Mbh
Publication of WO2007020023A1 publication Critical patent/WO2007020023A1/fr

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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 ; 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
    • 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
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/03—Monitoring or diagnosing the deterioration of exhaust systems of sorbing activity of adsorbents or absorbents
    • 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
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/18—Ammonia
    • 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
    • F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
    • 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 present invention is a method and an apparatus for the selective catalytic reduction of nitrogen oxides in the exhaust gas of an internal combustion engine.
  • the method according to the invention and the device according to the invention can be used particularly advantageously in exhaust systems of mobile internal combustion engines, in particular in the exhaust system of automobiles, motorized two-wheeled vehicles, watercraft and / or aircraft.
  • ammonia (NH 3 ) as a reducing agent has proven to be a possible alternative. Due to the chemical properties and the legal regulations in many countries, ammonia is usually not kept as pure ammonia, as this can lead to problems especially in motor vehicles or other mobile applications. Rather, instead storing the reducing agent itself often stored reducing agent precursor and carried in mobile applications.
  • a reducing agent precursor is understood to mean in particular a substance which splits off the reducing agent or can be chemically converted into the reducing agent.
  • ammonia urea is a reducing agent precursor.
  • Other possible reducing agent precursors for ammonia as the reducing agent are, for example, ammonium carbamate, isocyanic acid and cyanuric acid.
  • the invention is based on the object to propose a method and an apparatus for the selective catalytic reduction of nitrogen oxides, in which avoids breakthrough of the reducing agent and at the same time the best possible conversion efficiency of the nitrogen oxides is achieved.
  • the amount of reactant to be added is determined as a function of a conversion of reducing agent which is possible under given reaction conditions of the selective catalytic reduction of nitrogen oxides.
  • a reducing agent precursor is understood here to mean in particular a substance which can split off a reducing agent or which can be converted into a reducing agent.
  • a reducing agent comprises in particular a nitrogen-containing substance, preferably ammonia.
  • Possible reducing agent precursors are, for example, urea, isocyanic acid, cyanuric acid and / or ammonium carbamate.
  • the reaction agent can be added in particular in the form of a solid and / or an aqueous solution.
  • reaction conditions are understood here in particular all conditions which have an influence on the position of the reaction equilibrium and / or the yield of the reduction reaction.
  • the reaction conditions are preferably determined, in particular measured and / or calculated, and a maximum possible conversion of reducing agent determined on the basis of these reaction conditions taking into account the reaction kinetics.
  • the design of the exhaust gas system can then be taken into account in the calculation.
  • a temperature before a reduction catalyst can be measured, and in the calculation of the temperature of the reduction catalyst, the thermal mass of the reduction catalyst and / or the thermal mass of an upstream honeycomb body, in particular a particle filters are taken into account.
  • the dynamics in the exhaust system and / or the operation of the internal combustion engine can be taken into account.
  • reaction conditions comprise at least one of the following parameters:
  • a reaction temperature 2.1) is understood in particular to mean the temperature of a reduction catalyst at or in which a selective catalytic reduction of the nitrogen oxides takes place.
  • the exhaust gas mass flow 2.2) is determined in particular by the operating state of the internal combustion engine, as well as the average exhaust gas velocity 2.3) and the exhaust gas composition 2.4).
  • the quantities 2.1), 2.2), 2.3) and / or 2.4), as well as further reaction conditions, can in particular be measured and / or calculated.
  • a calculation can be made in particular on the operating data of the internal combustion engine taking into account the design of the corresponding exhaust system.
  • the selective catalytic reduction takes place in a reduction catalyst, the amount of reactant to be added being determined as a function of at least one average temperature of the reduction catalyst.
  • the maximum possible amount of reducing agent is determined, which can be implemented in the reduction catalyst. If the stoichiometrically calculated amount of reducing agent is above this particular maximum amount, then only the maximum amount of reducing agent or only the corresponding amount of reducing agent precursor is added.
  • the reduction catalyst comprises, like all other catalysts disclosed in the context of this invention, a honeycomb body which has channels through which fluid can flow.
  • a honeycomb body may in particular be a ceramic or a metallic honeycomb body.
  • Metallic honeycomb bodies preferably comprise at least one at least partially structured metallic layer, which in particular is twisted, entangled or wound in such a way that channels through which an exhaust gas can flow are formed.
  • the reducing agent catalyst may in particular comprise a titanium dioxide (anatase) -supported vanadium / tungsten mixed oxide or metal-exchanged ceelites, in particular iron-exchanged ceelites, preferably of the X, Y, ZSM 5, ZSM 11 and / or faujasite type.
  • a maximum amount of reducing agent is determined on the basis of the reaction conditions and the amount of reactant corresponding to the maximum amount of reducing agent is added.
  • a quantity of reducing agent is understood below to mean the amount of reducing agent which is determined as a function of the amount of nitrogen oxides to be reacted in the exhaust gas, which therefore leads in particular to a stoichiometric conversion of the nitrogen oxides present in the exhaust gas.
  • the amount Nitrogen oxides can in principle be measured and / or calculated. The calculation of the nitrogen oxide concentration as well as all other variables can be based, in particular, on the operating data of the internal combustion engine known from engine management.
  • the maximum amount can not be greater than the sales volume, since the corresponding amount of nitrogen oxide is included in the maximum quantity. That is, according to the invention, the maximum amount is smaller than the conversion amount, if the reaction conditions allow only a partial conversion of the reducing agent.
  • the temperature in the selective catalytic reduction in particular the temperature of a corresponding reduction catalyst, is too small. If the reaction conditions are appropriate, ie in particular the temperature is correspondingly high, the maximum length corresponds to the amount of sales.
  • the reaction medium comprises at least one of the following substances:
  • Urea is an easily available ammonia precursor as a reducing agent precursor.
  • the urea can be stored and added as a solid urea or even in the form of an aqueous urea solution.
  • the reducing agent and / or the reducing agent precursor are stored and added in the form of a liquid, for example in the form of a solution, preferably an aqueous solution, it is advantageous to add to this solution at least one substance which has the freezing point of this solution or This substance is degraded.
  • a reducing agent precursor which is in the form of an aqueous solution
  • ammonium formate may be added here.
  • ammonium formate it is the corresponding salt of formic acid.
  • a corresponding solution is available under the brand name "Denoxium”.
  • reaction conditions are determined in at least one of the following ways:
  • the measurement can be carried out in each case by appropriately trained sensors, for example nitrogen oxide sensors and / or lambda probes, temperature sensors, flow meters and the like.
  • the calculation can be carried out in each case in particular based on the engine operating data of the internal combustion engine.
  • the calculation 6.2) can take place in particular in the context of engine control and / or use the data of the engine control.
  • step 6.2 a temperature reduction is taken into account by at least one of the following operations:
  • a conversion 7.2) is understood in particular to mean hydrolysis and / or thermolysis of the reducing agent precursor into a reducing agent. In particular, this may be the hydro- and / or thermolysis of urea to ammonia.
  • an apparatus for the selective catalytic reduction of nitrogen oxides (NO x ) in the exhaust gas of an internal combustion engine which comprises a reactant addition for adding at least one of the following reactants: a) a reducing agent and b) a reducing agent precursor, a Reduction catalyst for the selective catalytic reduction of nitrogen oxides and a control device for controlling the addition of reactants.
  • the control device is designed such that the amount of reactant added by the reaction agent addition is controlled so that the amount of reducing agent in the selective catalytic reduction is less than or equal to a maximum amount of reducing agent which is dependent on reaction conditions in the reaction catalyst.
  • the reaction conditions comprise at least one of the following variables:
  • reaction conditions can be measured and / or calculated.
  • a calculation may be based on the engine control data of the internal combustion engine.
  • the addition of reactant is suitable for adding at least one of the following reactants: 10.1) ammonia and 10.2) urea.
  • corresponding storage and conveying means are designed for the reagent, ie in particular for ammonia and / or urea.
  • the suitability includes, for example, in the case of a liquid reactant, in particular a reaction medium solution, a corresponding nozzle or the like.
  • control device is suitable for calculating the reaction conditions.
  • means for measuring the reaction conditions are formed.
  • These may in particular be temperature sensors, lambda sensors, gas concentration sensors and / or flow meters.
  • the device according to the invention is particularly suitable for carrying out the method according to the invention.
  • the advantages and details disclosed for the method according to the invention are transferable and applicable to the device according to the invention. This also applies to the details disclosed in the context of the device according to the invention and advantages which are equally applicable to the inventive transfer and application.
  • FIG. 1 Schematically an exemplary embodiment of a device according to the invention for the selective catalytic reduction of nitrogen oxides
  • Fig. 2 shows schematically a reducing agent masses course against time.
  • 1 shows schematically an exemplary embodiment of a device 1 according to the invention for the selective catalytic reduction of nitrogen oxides (NO x ) in the exhaust gas of an internal combustion engine 2.
  • the exhaust gases of the internal combustion engine 2 are discharged into an exhaust system 3, which comprises the device 1.
  • the apparatus 1 comprises a reagent addition 4 for adding at least one of the following reactants 5: a) a reducing agent and b) a reducing agent precursor.
  • the reducing agent is in particular a nitrogen-containing reducing agent and basically serves for the selective catalytic reduction of nitrogen oxides in a reduction catalyst 6.
  • reducing agent ammonia (NH 3 )
  • reducing agent precursor urea ((NH 2 ) 2 CO)
  • the reducing agent precursor can be added in particular in solid form or in the form of an aqueous solution as reaction agent 5 through the addition of reagent 4.
  • the device 1 according to the invention comprises a control device 7 for controlling the addition of reactant 4.
  • the control device 7 is connected via a signal line 8 to the reagent addition 4 or also to a reagent supply 9.
  • the reagent supply unit 9 comprises in particular a corresponding reservoir for the reagent and corresponding conveyor.
  • the conveyor may in particular comprise a pump.
  • the conveying device may in particular comprise a conveying device suitable for solids transport. Particularly preferred is the addition in the form of pellets or prills, if the reactant is added as a solid. Pellets or prills are understood to mean, in particular, small quantisable or separable reactant particles.
  • control device 7 is also connected to the internal combustion engine 2 via further signal lines 8.
  • the Control device may be part of the engine management or also receive data from the engine management of the internal combustion engine 2.
  • reaction conditions for the selective catalytic reduction of nitrogen oxides in the reduction catalytic converter 6 are calculated on the basis of the operating data and / or a known operating characteristic map of the internal combustion engine 2. This can be done for example on the basis of the data, in particular the operating parameters of the internal combustion engine, wherein in particular the design and design of the exhaust system 3 can be considered.
  • reaction conditions in particular a reaction temperature, an exhaust gas mass flow, an average exhaust gas velocity and / or an exhaust gas composition are understood.
  • urea is added as the reducing agent precursor for the reducing agent in the form of an aqueous urea solution via the reactant addition 4 into the exhaust gas stream.
  • Reactant 4 then encounters a hydrolysis catalyst 17, wherein, for example, a thermolysis of the urea ((NH 2 ) 2 CO) in ammonia (NH 3 ) and
  • the resulting ammonia then serves as a reducing agent in the reduction catalyst 6, where it reacts with nitrogen monoxide (NO) and / or nitrogen dioxide (NO 2 ) to nitrogen (N 2 ) and water.
  • NO nitrogen monoxide
  • NO 2 nitrogen dioxide
  • the transit time of the exhaust gas from the internal combustion engine 2 to the reduction catalytic converter 6 so that the data of the nitrogen oxide emissions of the internal combustion engine 2 present at any time t are used as the basis for the calculation of sales data on the reduction catalytic converter 6 at a time t + ⁇ t serve, wherein the time interval .DELTA.t substantially the duration of the exhaust gas from the internal combustion engine 2 to the reduction catalyst 6 represents.
  • This transit time can be calculated on the basis of the data of the internal combustion engine with knowledge of the configuration of the exhaust system 3. For this purpose, data about the exhaust gas mass flow and the average exhaust gas velocity can also be used.
  • means for measuring the reaction conditions are formed. These include in particular a nitrogen oxide sensor 10, a first temperature sensor 11 and a second temperature sensor 12. With the aid of the first temperature sensor 11, the exhaust gas temperature can be determined, while the second temperature sensor 12 is used to determine the temperature in the reduction catalyst 6.
  • the means for measuring reaction conditions 9, 10, 11 presented here can be formed individually or in any combination with one another and also in combination with other sensors, in particular lambda sensors and / or reducing agent concentration sensors.
  • Fig. 2 shows schematically mass progressions M against the time t. Both the mass and the time are given in relative units.
  • a first mas- senverlauf 13 indicates the amount of reducing agent per unit time, which is required due to the amount of nitrogen oxides contained in the exhaust gas to substantially fully implement this amount.
  • a second mass profile 14 indicates the maximum amount of reducing agent which can be maximally converted on the basis of the reaction conditions. First 13 and second mass history 14 are identical at some time intervals.
  • FIG. 2 shows that there are time intervals 15, in which the first mass profile lies above the second mass profile 14. This means that for the stoichiometric conversion of the nitrogen oxides more reducing agent would have to be added than can be reacted at the reduction catalyst 6.
  • the method according to the invention and the device according to the invention advantageously lead to a reduction in the consumption of reducing agent and thus in reactant 5 with the same nitrogen oxide conversion efficiencies.
  • the addition of reactant proceeds according to the first mass flow 13, ie the amount of sales.
  • the method according to the invention and the device 1 according to the invention advantageously allow the consumption of reducing agent or reducing agent precursor to be reduced in the case of a selective catalytic reduction of nitrogen oxides.

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  • 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)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

L'invention concerne un procédé de réduction catalytique sélective d'oxydes d'azote (Nox) dans les gaz d'échappement d'un moteur à combustion interne (2) avec un agent de réduction, au moins un des réactifs (5) suivants étant ajouté: a) un agent de réduction et b) un précurseur d'agent de réduction. Ledit procédé se caractérise en ce que la quantité de réactif (5) ajouté est déterminée en fonction d'une conversion possible de réactifs, dans des conditions de réactions données de la réduction catalytique sélective. Le procédé selon l'invention et le dispositif (1) selon l'invention permettent de réduire avantageusement l'utilisation d'agents de réduction et de précurseurs d'agents de réduction lors d'une réduction catalytique sélective d'oxydes d'azote. Dans le cas d'utilisations mobiles de réduction catalytique sélective d'oxydes d'azote, notamment dans des systèmes d'échappement (3) d'automobiles, la consommation d'agents de réduction peut ainsi être avantageusement réduite et l'intervalle entre deux processus de remplissage du réservoir de réactifs peut être augmenté.
PCT/EP2006/007972 2005-08-12 2006-08-11 Procede et dispositif de reduction catalytique selective d'oxydes d'azote dans des gaz d'echappement de moteur a combustion interne WO2007020023A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005038571.0 2005-08-12
DE102005038571A DE102005038571A1 (de) 2005-08-12 2005-08-12 Verfahren und Vorrichtung zur selektiven katalytischen Reduktion von Stickoxiden im Abgas einer Verbrennungskraftmaschine

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Publication Number Publication Date
WO2007020023A1 true WO2007020023A1 (fr) 2007-02-22

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WO (1) WO2007020023A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2532463C2 (ru) * 2009-12-18 2014-11-10 Вольво Ластвагнар Аб Способ управления резервным уровнем восстановителя в устройстве нейтрализации отработавших газов

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EP1069288A2 (fr) * 1999-07-12 2001-01-17 Ford Global Technologies, Inc. Système de régulation d'émission avec un catalyseur
EP1181972A1 (fr) * 2000-08-09 2002-02-27 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Proceédé et appareil pour l'alimentation d'un agent de réduction dans un dispositif de catalyseur
DE10101364A1 (de) * 2001-01-13 2002-07-18 Fev Motorentech Gmbh Verfahren zur Umwandlung eines festen stickstoffhaltigen Reduktionsmittels in eine Gasphase für die Reduktion von Stickoxiden in sauerstoffhaltigen Abgasen nach dem Prinzip der selektiven katalytischen Reduktion
US6449945B1 (en) * 2001-04-18 2002-09-17 Ford Global Technologies, Inc. Emission control system
US20040098974A1 (en) * 2002-11-21 2004-05-27 Nieuwstadt Michiel J. Van Exhaust gas aftertreatment systems
WO2004113691A2 (fr) * 2003-06-18 2004-12-29 Johnson Matthey Public Limited Company Procedes de commande d'ajout de reducteur
DE10337901A1 (de) * 2003-08-18 2005-03-24 Audi Ag Verfahren und Vorrichtung zur Synthese von Ammoniak und Verfahren zur Reinigung von Abgasen einer Brennkraftmaschine

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DE4003515A1 (de) * 1990-02-06 1991-08-08 Bayer Ag Verfahren zur reduktion von in abgasen enthaltenen stickoxiden
DE4237705A1 (de) * 1992-11-07 1994-05-11 Mtu Friedrichshafen Gmbh Verfahren zum Steuern der Zugabemenge an Stickoxid-Reduktionsmitteln in das durch eine Abgasreinigungsanlage für Dieselmotoren strömendes Abgas
EP1033480A1 (fr) * 1999-02-17 2000-09-06 Man Nutzfahrzeuge Ag Procédé de dosage d'un agent de réduction dans le gaz d'échappement d'un moteur à combustion interne contenant de l'oxyde d'azote
DE10301606A1 (de) * 2003-01-17 2004-07-29 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben eines Katalysators

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1069288A2 (fr) * 1999-07-12 2001-01-17 Ford Global Technologies, Inc. Système de régulation d'émission avec un catalyseur
EP1181972A1 (fr) * 2000-08-09 2002-02-27 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Proceédé et appareil pour l'alimentation d'un agent de réduction dans un dispositif de catalyseur
DE10101364A1 (de) * 2001-01-13 2002-07-18 Fev Motorentech Gmbh Verfahren zur Umwandlung eines festen stickstoffhaltigen Reduktionsmittels in eine Gasphase für die Reduktion von Stickoxiden in sauerstoffhaltigen Abgasen nach dem Prinzip der selektiven katalytischen Reduktion
US6449945B1 (en) * 2001-04-18 2002-09-17 Ford Global Technologies, Inc. Emission control system
US20040098974A1 (en) * 2002-11-21 2004-05-27 Nieuwstadt Michiel J. Van Exhaust gas aftertreatment systems
WO2004113691A2 (fr) * 2003-06-18 2004-12-29 Johnson Matthey Public Limited Company Procedes de commande d'ajout de reducteur
DE10337901A1 (de) * 2003-08-18 2005-03-24 Audi Ag Verfahren und Vorrichtung zur Synthese von Ammoniak und Verfahren zur Reinigung von Abgasen einer Brennkraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2532463C2 (ru) * 2009-12-18 2014-11-10 Вольво Ластвагнар Аб Способ управления резервным уровнем восстановителя в устройстве нейтрализации отработавших газов

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