WO2000032914A1 - Dispositif de traitement secondaire de gaz d'echappement d'un moteur a combustion interne - Google Patents

Dispositif de traitement secondaire de gaz d'echappement d'un moteur a combustion interne Download PDF

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Publication number
WO2000032914A1
WO2000032914A1 PCT/DE1999/003107 DE9903107W WO0032914A1 WO 2000032914 A1 WO2000032914 A1 WO 2000032914A1 DE 9903107 W DE9903107 W DE 9903107W WO 0032914 A1 WO0032914 A1 WO 0032914A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
reducing agent
exhaust pipe
exhaust
internal combustion
Prior art date
Application number
PCT/DE1999/003107
Other languages
German (de)
English (en)
Inventor
Hermann Grieshaber
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2000032914A1 publication Critical patent/WO2000032914A1/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
    • F01N3/18—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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • 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
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106—Auxiliary oxidation catalysts
    • 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
    • F01N2240/20—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 a flow director or deflector
    • 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
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • 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
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • 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 relates to a device 'for the aftertreatment of exhaust gases of an internal combustion engine, with a reduction of NOx constituents of the exhaust gases serving reduction catalyst, in particular, but not exclusively for self-igniting internal combustion engines or diesel engines.
  • catalysts have been used in recent years developed, which are based on a NOX storage reduction process and which use the hydrocarbons of the fuel carried on board as a reducing agent.
  • Various materials such as alkali metals, are used in these processes to store nitrogen oxides.
  • the conventional three-way catalytic converter technology is still used to convert the nitrogen oxides. This conversion takes place during the regeneration of the memory, ie in a phase during which the engine is briefly operated at ⁇ ⁇ 1.0, so that the conversion of NOX can take place.
  • a device for the aftertreatment of exhaust gases from an internal combustion engine in which the performance of the catalyst is to be improved via a metering device.
  • the metering device is designed as a small-volume metering displacement pump, which has a thread in the form of a groove on a cylindrical rotating body, with the
  • Rotating body is driven at variable speed.
  • its condition when entering the catalyst is an extremely important treatment criterion.
  • a device for aftertreatment of exhaust gases from an internal combustion engine with a reduction catalytic converter is known according to the preamble of claim 1.
  • This generic device comprises a reduction catalyst serving to reduce NOX components of the exhaust gases, to which an exhaust pipe leads.
  • the reducing agent is supplied via a reducing agent supply and metered in via a controllable valve.
  • the metered amount of reducing agent is fed to a tube evaporator with a glow plug, which acts as a reducing agent evaporation device.
  • this known system does not guarantee any reducing agents -
  • the cavity provided in the evaporation device also creates a certain dead volume, which prevents precise control of the processing of reducing agent and thus the entire aftertreatment.
  • this object is achieved by a device having the feature of claim 1.
  • the atomization or evaporation of the reducing agent is advantageously supported in that the nozzle has a heating device or is a so-called heating nozzle, a heating nozzle with self-regulating PTC heating elements being preferred in particular.
  • the reducing agent is largely evaporated and dispensed at temperatures of approximately 300 ° C. to 360 ° C.
  • Heating nozzles with self-regulating thermistor heating elements are particularly preferred because only short-term regeneration phases are required and because with high efficiency an exact adjustment by means of a suitable selection of materials and thus resistance-temperature characteristics is possible.
  • the nozzle is provided directly on the exhaust pipe and may itself be heated as a heating nozzle, the nozzle should advantageously be formed from temperature-resistant materials.
  • individual heat decoupling elements such as, for example, insulating bushes or the like, can also be provided in order to protect individual, thermally not so resistant components from the temperatures of up to 360 ° C.
  • the nozzle is arranged on the exhaust pipe in such a way that it introduces the reducing agent into the exhaust pipe substantially perpendicular to the direction of movement of the exhaust gas. This arrangement enables a very high degree of uniformity of mixing with the exhaust gas at the catalyst inlet to be achieved.
  • the reducing agent can be introduced slightly off-center, for example, so that an exhaust gas swirl or rotation movement is caused.
  • the nozzle is advantageously arranged on the exhaust pipe in such a way that it is essentially flush with the inside of the exhaust pipe. This arrangement does not change the cross-sectional area of the exhaust pipe, so that the flow processes prevailing therein are easy to master.
  • An application device is preferably assigned to the nozzle, e.g. in the form of a gear pump with pressure regulator or the like.
  • the reducing agent depending on e.g. the exhaust gas velocity in the exhaust pipe or other
  • Evaporation effect can take place by means of relaxation, atomization and heating.
  • a device is provided on or in the exhaust pipe that can influence the exhaust gas flow.
  • This device can be provided, for example, in the form of simple baffle plates or more complex systems in order to give the exhaust gas flow a certain flow profile before and / or after introduction of the reducing agent, for example in order to achieve a swirl action on the exhaust gas or to generate a turbulent flow .
  • the device advantageously comprises an oxidation catalytic converter connected upstream of this, which may be necessary for implementing the three-way catalytic converter principle for NOx conversion.
  • the nozzles or heating nozzles should be arranged upstream of the oxidation catalytic converter so that it converts hydrocarbons and thus consumes oxygen.
  • a plurality of nozzles are arranged on the exhaust pipe, these being particularly preferably arranged regularly.
  • An arrangement that is constant in the radial direction is preferred as a regular arrangement. If, for example, three nozzles are used, they should preferably be arranged at 120 ° apart on a tube with a circular cross section. However, it should be understood that the arrangement of several nozzles does not necessarily have to be in one plane, but rather that there is a certain spacing in the axial direction Direction can be advantageous.
  • This control should include both the discharge rate, the nozzle opening degree, the
  • Atomization function and possibly control the heating elements.
  • Figure 1 shows a schematic diagram of a device according to a preferred embodiment of the invention.
  • FIG. 2 shows a sectional view through part of the device shown schematically in FIG. 1.
  • FIG. 3 shows a sectional view through a heating nozzle which can be used in the device according to the invention.
  • the internal combustion engine shown as a preferred embodiment of the device according to the invention.
  • the exhaust gases from the In the embodiment shown, the internal combustion engine is guided via an exhaust pipe to an oxidation catalytic converter 18, which is optional and forms part of a three-way catalytic converter system. After the oxidation catalytic converter, the exhaust gases enter a reduction catalytic converter 1.
  • the reduction catalyst 1 can be operated essentially in two different modes, namely a so-called lean mode, during which NO oxidation takes place on a noble metal of the catalyst to NO 2 , which NO 2 can be adsorbed via nitrate formation, so that the reduction catalyst as NOX storage is used.
  • the second mode is "the so-called rich mode, ie the oxidation catalytic converter is charged with a" rich exhaust gas ".
  • the NOXs stored in the reducing agent catalyst 1 are released.
  • the adsorbed nitrates are decomposed to N0 2 , with a reduction of NOX taking place on a noble metal of the catalyst.
  • Mode can take place depending on the operating states of the engine, the engine controller possibly also being able to control the engine for a short time in such a way that one or the other mode is executed, depending on whether regeneration of the storage catalytic converter 1 is required or not.
  • sensors for example nitrogen oxide and / or pressure sensors 14, 15 can be provided in the exhaust pipe before and after the catalytic converter.
  • the “exhaust gas rich” mode is supported or provided overall by introducing a reducing agent into the exhaust line 2 upstream of the reduction catalytic converter 1
  • a nozzle 6 is arranged upstream of the reduction catalytic converter 1 on the exhaust pipe 2.
  • the nozzle 6 is supplied by a pump 10, which is connected, for example, to the fuel reservoir of the internal combustion engine.
  • a control device 12 controls the delivery rate of the pump 10 and the throughput volume and the atomization phase or injection rate of the nozzle 6, depending on the supply
  • a heating device 8 is assigned to the nozzle 6, which can also be controlled via the control device 12.
  • the heating device 8 is a self-regulating PTC thermistor.
  • the nozzle 6 and the heating device 8 are provided as a prefabricated element, namely a so-called heating nozzle.
  • the nozzle 6 is provided substantially flush with the inside of the exhaust pipe 2, so that the exhaust gas flow in the exhaust pipe 2 is not influenced by the nozzle itself.
  • the exhaust gas flowing in the exhaust pipe 2 can thus mix in a particularly efficient manner with the reducing agent emerging from the nozzle 6, so that a practically homogeneous mixture is present at the catalyst inlet. Mixing is further increased by the essentially vertical injection of the reducing agent.
  • a controllable exhaust gas deflection device 20 is provided in the embodiment shown, which can act on the exhaust gas flow in the exhaust pipe 2 in a swirling manner or make it turbulent.
  • the deflection device 20 is controlled by a control device 22. It should be noted that both the controller 12 and the
  • Control device 22 can be part of the engine control for the internal combustion engine, as well as devices that are present separately in this regard.
  • FIG. 2 shows an arrangement of a heating nozzle 6, 8 on an exhaust pipe 2 as part of a preferred embodiment of the invention.
  • the exhaust pipe 2 tapers in a funnel shape after the reducing agent has been fed in via the nozzle 6 and opens into the reduction catalytic converter 1.
  • the funnel-shaped tapering forms a
  • Device 20 influencing exhaust gas flow, which supports homogenization of the mixture of reducing agent and exhaust gas.
  • FIG. 2 shows a heating nozzle in a detailed sectional view, which can be used in the solution according to the invention.
  • the heating nozzle shown comprises a valve support 31 which is provided at its right end with a reducing agent connecting device which opens into a filter element 38.
  • the reducing agent is guided past the PTC thermistor heating elements 8 by the filter element 38 and released from the nozzle at the left end by means of expansion.
  • the nozzle comprises a valve group 6, which will not be discussed in further detail, since this is familiar to the person skilled in the art.
  • the heating elements 8 can be fed via a contact pin 37, for example via a battery.
  • the insulating bushes 32 and 33 are to be regarded as an important component of the heating nozzle, by means of which the heating nozzles can be adapted to the high thermal stresses in the exhaust gas environment.
  • the solution according to the invention specifies a reducing agent metering and preparation which can be optimized depending on the parameters with regard to the number of introduction points, the arrangement with optimized
  • a plurality of nozzles can be arranged on the exhaust pipe, at a distance in the axial direction and / or radial direction, it being known to the person skilled in the art that these several nozzles can be controlled together in groups or individually.
  • the function of an exhaust gas flow influencing device can also be fulfilled by the arrangement of the one or more nozzles, for example by the exhaust gas flow is swirled by the injected or introduced reducing agent, is set in rotation or is made turbulent.

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

Abstract

Dispositif servant à effectuer le traitement secondaire de gaz d'échappement d'un moteur à combustion interne au moyen d'un catalyseur de réduction (18) servant à réduire la teneur en NOX des gaz d'échappement et relié à un tuyau d'échappement (2). Ce dispositif comprend une alimentation (4) en produit de réduction, un ensemble de dosage (6, 10, 12) en produit de réduction et un ensemble (6) de vaporisation de ce produit de réduction, ce qui permet d'effectuer le dosage du produit de réduction et sa vaporisation au moins partielle au moyen au moins d'un ajutage (6) placé sur le tuyau d'échappement (2). Cet ajutage (6) peut être associé à un élément de réchauffement (8) et conçu, de ce fait, également tel qu'un ajutage de réchauffement.
PCT/DE1999/003107 1998-12-01 1999-09-28 Dispositif de traitement secondaire de gaz d'echappement d'un moteur a combustion interne WO2000032914A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19855385.4 1998-12-01
DE19855385A DE19855385A1 (de) 1998-12-01 1998-12-01 Vorrichtung zum Nachbehandeln von Abgasen einer Brennkraftmaschine

Publications (1)

Publication Number Publication Date
WO2000032914A1 true WO2000032914A1 (fr) 2000-06-08

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PCT/DE1999/003107 WO2000032914A1 (fr) 1998-12-01 1999-09-28 Dispositif de traitement secondaire de gaz d'echappement d'un moteur a combustion interne

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Country Link
DE (1) DE19855385A1 (fr)
WO (1) WO2000032914A1 (fr)

Cited By (4)

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WO2008040628A1 (fr) * 2006-10-02 2008-04-10 Emitec Gesellschaft Für Emissionstechnologie Mbh Dispositif et procédé d'évaporation d'un réactif
JP2009541627A (ja) * 2006-03-17 2009-11-26 コンティネンタル オートモーティブ システムズ ユーエス， インコーポレイティッド ディーゼルシステムの排気調量構造体
US8281570B2 (en) 2007-08-09 2012-10-09 Caterpillar Inc. Reducing agent injector having purge heater
DE102014017961A1 (de) 2014-12-05 2016-06-09 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Vorrichtung zur Aufbereitung eines Reduktionsmittels für eine Einleitung in das Abgas einer Brennkraftmaschine

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US6315969B1 (en) 2000-02-18 2001-11-13 Mitsubishi Heavy Industries America, Inc. Gas re-circulation selective catalytic reduction system with heat trace
JP3794468B2 (ja) * 2000-12-19 2006-07-05 三菱電機株式会社 内燃機関の排気ガス浄化装置
DE10065473A1 (de) * 2000-12-28 2002-07-04 Basf Ag Verfahren und Konverter zur katalytischen Umwandlung von Kraftstoff
DE10206028A1 (de) * 2002-02-14 2003-08-28 Man Nutzfahrzeuge Ag Verfahren und Vorrichtung zur Erzeugung von Ammoniak
DE10225273B4 (de) * 2002-06-07 2006-06-14 Zeuna-Stärker GmbH & Co KG Kraftfahrzeug mit einem Diesel-Antriebsmotor
DE50307925D1 (de) * 2002-06-07 2007-09-27 Arvinmeritor Emissions Tech Kraftfahrzeug mit einem Diesel-Antriebsmotor mit mittels Kraftstoffdampfeindüsung diskontinuierlich regenerierbarem Abgasreinigungssystem
JP4262522B2 (ja) * 2003-05-28 2009-05-13 株式会社日立ハイテクノロジーズ エンジン用排気ガス処理装置および排気ガス処理方法
JP4254721B2 (ja) 2005-02-04 2009-04-15 トヨタ自動車株式会社 内燃機関の排気浄化装置
US20070033927A1 (en) * 2005-08-15 2007-02-15 Homby Michael J Automotive diesel exhaust HC dosing valve
DE102005059887A1 (de) * 2005-12-15 2007-06-28 Volkswagen Ag Abgasreinigungsvorrichtung eines Kraftfahrzeugs
DE102006025332A1 (de) * 2006-05-31 2007-12-06 Robert Bosch Gmbh Verfahren und Vorrichtung zur Reinigung von Ventilen
FR2907501B1 (fr) * 2006-10-24 2011-11-04 Renault Sas Procede et dispositif d'injection de carburant dans un courant de gaz d'echappement.
US8484947B2 (en) * 2007-03-02 2013-07-16 Caterpillar Inc. Fluid injector having purge heater
US8006482B2 (en) 2007-03-02 2011-08-30 Caterpillar Inc. Method of purging fluid injector by heating
FR2914702B1 (fr) * 2007-04-06 2009-06-12 Peugeot Citroen Automobiles Sa Boitier de commande de puissance pour composants de moteur de vehicule automobile
US7958721B2 (en) * 2007-06-29 2011-06-14 Caterpillar Inc. Regeneration system having integral purge and ignition device
ATE524643T1 (de) 2007-12-05 2011-09-15 Emitec Denmark As Düsenanordnung
WO2009106609A1 (fr) 2008-02-29 2009-09-03 Emitec Gesellschaft Für Emissionstechnologie Mbh Unité d'évaporation destinée à la génération d'un gaz contenant au moins un précurseur d'agent de réduction et/ou un agent de réduction
DE102008012972A1 (de) * 2008-03-06 2009-09-10 Emitec Gesellschaft Für Emissionstechnologie Mbh Verdampfungseinheit zur Erzeugung eines mindestens einen Reduktionsmittelvorläufer und/oder ein Reduktionsmittel umfassenden Gases
DE102010021438B4 (de) * 2010-05-25 2014-01-02 Mtu Friedrichshafen Gmbh Abgasnachbehandlungsvorrichtung

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DE4017360A1 (de) * 1990-05-30 1991-12-05 Fev Motorentech Gmbh & Co Kg Verfahren zur nachbehandlung der abgase von brennkraftmaschinen waehrend des kaltstarts
DE4336632A1 (de) * 1993-10-27 1995-01-26 Siemens Ag Einrichtung zur Kontaktierung eines Strömungsmediums mit einem eine Reaktion induzierenden Material
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DE19646643C1 (de) * 1996-11-12 1998-02-12 Daimler Benz Ag Anlage zur Stickoxid-Reduktionsmitteleinspritzung in einen Abgasstrom
WO1998028070A1 (fr) * 1996-12-20 1998-07-02 Clean Diesel Technologies, Inc. Procede et dispositif pour reduire les emissions toxiques d'un moteur a gaz pauvre par reduction catalytique selective a injection d'uree
DE19743302C1 (de) * 1997-09-30 1999-02-04 Siemens Ag Verfahren und Vorrichtung zum Ausstoßen und Zumessen von elektrisch leitfähigem, flüssigem Reduktionsmittel

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Publication number Priority date Publication date Assignee Title
DE4017360A1 (de) * 1990-05-30 1991-12-05 Fev Motorentech Gmbh & Co Kg Verfahren zur nachbehandlung der abgase von brennkraftmaschinen waehrend des kaltstarts
DE4336632A1 (de) * 1993-10-27 1995-01-26 Siemens Ag Einrichtung zur Kontaktierung eines Strömungsmediums mit einem eine Reaktion induzierenden Material
DE19625447A1 (de) * 1996-06-26 1998-01-02 Bosch Gmbh Robert Rohrverdampfer für Zusatzkraftstoff ins Abgas
DE19646643C1 (de) * 1996-11-12 1998-02-12 Daimler Benz Ag Anlage zur Stickoxid-Reduktionsmitteleinspritzung in einen Abgasstrom
WO1998028070A1 (fr) * 1996-12-20 1998-07-02 Clean Diesel Technologies, Inc. Procede et dispositif pour reduire les emissions toxiques d'un moteur a gaz pauvre par reduction catalytique selective a injection d'uree
DE19743302C1 (de) * 1997-09-30 1999-02-04 Siemens Ag Verfahren und Vorrichtung zum Ausstoßen und Zumessen von elektrisch leitfähigem, flüssigem Reduktionsmittel

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US8357332B2 (en) 2006-10-02 2013-01-22 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Device and method for evaporating a reactant
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