WO2013158063A1 - Optimisation du dosage d'ammoniac pendant la régénération - Google Patents

Optimisation du dosage d'ammoniac pendant la régénération Download PDF

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Publication number
WO2013158063A1
WO2013158063A1 PCT/US2012/033777 US2012033777W WO2013158063A1 WO 2013158063 A1 WO2013158063 A1 WO 2013158063A1 US 2012033777 W US2012033777 W US 2012033777W WO 2013158063 A1 WO2013158063 A1 WO 2013158063A1
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WO
WIPO (PCT)
Prior art keywords
ammonia
particulate filter
nitrogen oxide
regeneration event
amount
Prior art date
Application number
PCT/US2012/033777
Other languages
English (en)
Inventor
Shyam Santhanam
Brad J. Adelman
Original Assignee
International Engine Intellectual Property Company, Llc
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 International Engine Intellectual Property Company, Llc filed Critical International Engine Intellectual Property Company, Llc
Priority to US14/394,838 priority Critical patent/US20150285124A1/en
Priority to PCT/US2012/033777 priority patent/WO2013158063A1/fr
Publication of WO2013158063A1 publication Critical patent/WO2013158063A1/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
    • 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
    • F01N3/0807—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
    • F01N3/18—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
    • 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
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F01N2610/146—Control thereof, e.g. control of injectors or injection valves
    • 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
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1606—Particle filter loading or soot amount
    • 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

  • Combustion engines may employ emission controls or systems that are configured to reduce the amount of nitrogen oxides (NOx), such as nitrogen dioxide, present in the engine's exhaust gas.
  • NOx nitrogen oxides
  • One aspect of controlling such emissions may include the use of a NOx particulate filter (NPF) that has a Selective Catalytic Reduction (SCR) system and a particulate filter.
  • NPF NOx particulate filter
  • SCR Selective Catalytic Reduction
  • the NPF may include an SCR and a diesel particulate filter.
  • the particulate filter is configured to remove particulate matter, such as soot, from the exhaust gas.
  • the SCR typically uses a catalyst, which, in some designs, may be coated on the particulate filter, and a reductant to convert NOx in the exhaust gas into nitrogen gas and water.
  • the reductant is injected into the exhaust gas before the exhaust gas enters the NPF.
  • the reductant may be a liquid or gas, such as, for example, urea, anhydrous ammonia, or aqueous ammonia, among others.
  • the reluctant may provide, or provide for the formation of, ammonia (NH 3 ) in dosing amounts or rates for the conversion of NOx in the SCR.
  • the exhaust system may determine the appropriate amount or rate of dosing ammonia that is needed for the conversion of the NOx in the SCR.
  • Ammonia besides the dosing ammonia may also be present in the NPF, such as, for example, ammonia that has been collected, absorbed, or stored on catalytic sites within the NPF.
  • the accumulation of particulate matter, such as soot, in the NPF may require that the NPF occasionally be cleaned or replaced.
  • One approach to cleaning the NPF is to remove or reduce the amount of accumulated soot by a regeneration, or oxidation, process or event.
  • the temperature within the NPF is increased, e.g., to around 550° C, to heat the soot to at least the combustion temperature of the soot.
  • the high temperatures in the NPF during the regeneration event may cause ammonia that has collected on catalytic sites within the NPF to be desorbed or released in the NPF.
  • ammonia collected in the NPF may be desorbed or otherwise released from the NPF during the regeneration event (referred to herein as released ammonia)
  • the exhaust system may continue introducing the dosing ammonia into the exhaust gas at the same rate or in the same amount as before the regeneration event.
  • the inclusion of both the released ammonia and the dosing ammonia in the NPF may result in an overabundance of ammonia.
  • excess ammonia that is not used to convert NOx in the SCR may be released into the exhaust stream and into the atmosphere.
  • the ability of the NPF to convert NOx to nitrogen gas and water, and more specifically the efficiency of the catalyst of the SCR, may diminish as the temperature within the NPF reaches and exceeds the temperatures needed for a regeneration event.
  • a decrease in the efficiency of the catalyst may increase the quantity of unused ammonia in the NPF, and thus result in unused ammonia slipping through the NPF.
  • the NPF is filled to a target capacity of dosing ammonia when the regeneration event starts, the released ammonia, as well as an amount of dosing ammonia that has not been utilized due to a decrease in the catalyst's efficiency, may slip through the NPF.
  • a precious metal based ammonia slip catalyst may oxidize the ammonia to produce nitrogen gas.
  • the inclusion of such a slip catalyst system and its precious metal adds to both the cost and the complexity of the emission system.
  • Embodiments depicted herein related to a method for managing an ammonia dosing strategy for the conversion of NOx in a NPF that includes a selective catalytic reduction system and particulate filter for a combustion engine.
  • the method includes monitoring a change in pressure across at least a portion of the NPF.
  • the method also includes predicting when a regeneration event within the NPF will be initiated based on the monitored pressure change across the NPF.
  • the method includes adjusting the amount of dosing ammonia provided to the NPF when the regeneration event is predicted to be initiated.
  • the method includes monitoring a change in pressure across at least a portion of the NPF and determining a soot load level in the NPF using the monitored pressure changes across the NPF.
  • the method further includes predicting when soot load level will reach a predetermine level that will trigger a regeneration event. Additionally, the amount of dosing ammonia provided to the NPF in advance of the regeneration event is reduced in order to prevent the accumulation of excess ammonia in the NPF during the regeneration event. Further, the amount of ammonia stored on the NPF is depleted in advance of the regeneration event being triggered by being used in the conversion of NOx in the selective catalytic reduction system.
  • the method includes predicting when a regeneration event will be initiated within the NPF.
  • the regeneration event is configured to combust soot that has accumulated in the NPF.
  • Ammonia stored in the NPF is released in advance of the regeneration event.
  • the released ammonia is used in the selective catalytic reduction system for the conversion of NOx.
  • the amount of reductant injected into the exhaust gas entering the NPF is decreased while the released ammonia is used in the conversion of NOx in the selective reduction system. Further, the amount of reductant injected into the exhaust gas after the released ammonia has been at least partially depleted is increased so as to continue the conversion of NOx in the selective reduction system.
  • FIG. 1 is a function block diagram of an engine system including an exhaust gas treatment system.
  • FIG. 2 is a flow chart illustrating an exemplary method for optimizing ammonia dosing of exhaust gas during active regeneration.
  • FIG. 1 is a function block diagram of an engine system 10 that includes an exhaust gas treatment system 12.
  • the engine system 10 includes a combustion engine 14, such as for example, and a diesel, gasoline, or petrol engine.
  • the engine system 10 may also include an exhaust manifold 16 that couples the combustion engine 14 to the exhaust gas treatment system 12.
  • the exhaust gas treatment system 12 may include one or more exhaust pipes 18 configured to transport engine exhaust gas along the exhaust gas treatment system 12 to, and out of, a tailpipe 20.
  • the exhaust gas treatment system 12 may also include an SCR 22, and particulate filter 24, and an engine control unit 26. As shown in FIG. 1, according to certain embodiments, the SCR 22 and particulate filter 24 may both be part of an NPF 27. As shown in FIG. 1, according to certain embodiments, the exhaust gas treatment system 12 may further include an exhaust gas temperature sensor 28, a first NOx sensor 30, and a flow sensor 32 that are positioned between the combustion engine 14 and the NPF 27. While these sensors 28, 30, 32 are illustrated in FIG. 1 as being upstream of the SCR 22, according to certain embodiments in which the SCR 22 is not coated on the particular filter of the NPF 27, these exhaust gas sensors 28, 30, 32 may be positioned downstream of the SCR 22 while remaining upstream of the NPF 27.
  • Information indicative of the sensed temperature, NOx level, and/or flow rate of the exhaust gas before entry into the NPF 27 may be sent to the engine control unit 26 or other control unit or module used to monitor the conditions of the exhaust gas.
  • an emission controller which may or may not be part of the engine control unit 26, may predict the NOx level, as discussed below.
  • the NPF 27 includes one or more NPF pressure sensors 34 and a NPF temperature sensor 36. Information indicative of the pressure sensed by the NPF pressure sensor(s) 34 and the temperature sensor 36 are also sent to the engine control unit 26 or other control module. Detected pressure changes in or across the NPF 27 may be used, such as, for example, by the engine control unit 26, in predicting when the soot load in the NPF 27 will reach a level that will trigger a regeneration event.
  • the exhaust gas treatment system 12 may also include a second NOx sensor 38 that is positioned between the outlet of the NPF 27 and an exhaust outlet, such as the outlet of the tailpipe 20. As shown in FIG. 1, according to certain embodiments, the second NOx sensor 38 is positioned within the tailpipe 20.
  • the second NOx sensor 38 provides information used by the engine control unit 26 or other control module in determining the amount of NOx present in exhaust gas downstream of the NPF 27. Such information may be used in a feedback ammonia injection strategy, as discussed below.
  • FIG. 2 is a flow chart illustrating an exemplary method 100 for optimizing ammonia dosing of exhaust gas during active regeneration.
  • the exemplary method 100 includes step 110, in which the amount of NOx released after combustion of fuel or other materials is detected or predicted upstream of the NPF 27.
  • the amount of NOx in the exhaust gas at a location upstream of the NPF 27 may be detected by a NOx sensor 30.
  • the NOx level of the exhaust gas upstream of the NPF 27 may be predicted by an emission controller that is operably connected to, or part of, the engine system, such as the engine control unit 26.
  • the emission controller may predict the NOx level based on a number of different factors and variables, including, for example, the type of fuel or material being combusted, intake air pressure and temperature, and/or the predicted or sensed combustion and/or exhaust temperature, among other factors.
  • the information detected or predicted at step 110 is used in determining a catalyst model for converting NOx to nitrogen gas and water.
  • the catalyst model is directed to predicting the amount of ammonia needed to convert the NOx to nitrogen gas and water based on the actual or predicted condition of the exhaust gas and the actual or predicted conditions inside the SCR 22.
  • the catalyst model may take into account the ratio of NO to N0 2 present in the exhaust gas, the temperature and flow rate of the exhaust gas, and the amount of ammonia stored in the NPF 27, among other factors.
  • the catalytic model may also predict the amount of ammonia that will be absorbed or consumed during the conversion of the NOx in the SCR 22.
  • Information from the catalyst model is provided to both a feed forward ammonia injection strategy and a feedback ammonia injection strategy at steps 130, 140, respectively.
  • the feedback injection strategy shown at step 140, is also provided with information regarding the amount of NOx detected or sensed in the exhaust gas downstream of the NPF 27. More specifically, at step 150, one or more NOx sensors 38 positioned downstream of the NPF 27, such as, for example, the NOx sensor 38 positioned in the tailpipe 20, detects the amount of NOx present in the exhaust.
  • the feedback ammonia strategy uses the information and/or conditions detected at step 150, as well as the catalyst model from step 120, to predict the amount dosing ammonia or reductant needed for the conversion of NOx in the SCR 22.
  • the feed forward ammonia injection strategy at step 130 also receives information from both the feedback injection strategy of step 140 and a regeneration event evaluator, shown at step 160.
  • the feed forward injection strategy predicts the amount of ammonia or reductant to inject into the exhaust gas based on these actual or predicted conditions.
  • the feed forward and feedback ammonia injection strategies may be unified into one step that receives information from at least both the catalytic model (step 120), the downstream NOX sensors 38 (step 150), and the regeneration event evaluator (step 160).
  • the regeneration event evaluator assists with actively managing ammonia storage within the NPF 27 so as to minimize wastage of ammonia during a regeneration event. For example, the regeneration event evaluator monitors and/or predicts when a regeneration event is imminent, or will be triggered, so that the amount and/or rate of dosing ammonia may be adjusted to reduce the likelihood of excess ammonia slipping through the NPF 27 during the regeneration event.
  • the regeneration event evaluator may be a particulate filter regeneration control module that is located in a control unit of the engine system 10, such as, for example, the engine control unit 26.
  • the engine control unit 26 may control various engine functions and operations, such as, for example, controlling an electronic fuel injection system, among other tasks.
  • a number of different triggers may result in the initiation of a regeneration event, including, for example, the expiration of a time period since the previous regeneration event, the actual or predicted soot load in the NPF 27 reaching a predetermined or maximum level, and/or gas flow rates through the NPF 27, among other triggers.
  • one or more pressure sensors 34 are position along the NPF 27 to continuously or periodically measure changes in pressure across the NPF 27. Such sensed or measured pressure changes may be used by subsequent logic, calculations, and/or an algorithm(s) to predict the soot load in the NPF 27 and to predict when the soot load will reach a level that will trigger a regeneration event.
  • a predicted regeneration event When a predicted regeneration event is going to be triggered or occur can be presented in different units, such the time of day, time of operation, engine strokes, and/or miles (for embodiments used with vehicles), among others.
  • sensed or measured changes in pressure may be mapped and/or calibrated to a known soot level by the particulate filter regeneration control module or other control module to predict the number of miles before the regeneration event will, or is predicted to, be triggered.
  • Information from the regeneration event evaluator regarding when the next regeneration event will be, or is predicted to be, triggered is provided to the feed forward ammonia injection strategy (step 130).
  • the feed forward ammonia injection strategy uses this information to determine a dosing ammonia strategy that eliminates or reduces the potential for excess ammonia in the NPF 27 when the regeneration event occurs.
  • the feed forward ammonia injection strategy will take into account that during operation of the combustion engine 14, NOx is continually present in exhaust gas from the combustion engine 14 following combustion of fuel.
  • the rate or amount of dosing ammonia may be adjusted, e.g., reduced, to prevent the presence of excess (unused) ammonia in the SCR 22 during the regeneration event due to the presence of both the released and dosing ammonia.
  • the ammonia dosing strategy may involve reducing or eliminating the amount or rate of dosing ammonia prior to the regeneration event so that ammonia present or stored in the NPF 27 is utilized in advance, or before, the regeneration event.
  • the amount or rate of dosing ammonia during the regeneration event may then be optimized in view of the elevated regeneration temperatures so as to prevent or minimize the amount of ammonia that slips through the NPF 27 while still providing sufficient ammonia for NOx conversion in the SCR 22.
  • the temperature within the NPF 27 may be elevated to release ammonia stored in the NPF 27.
  • the amount or rate of dosing ammonia may be reduced to compensate for the addition of released ammonia in the NPF 27.
  • the amount or rate of the dosing ammonia may be adjusted to accordingly to continue the conversion of NOx in the SCR 22 during the regeneration event while seeking to prevent ammonia from slipping through the NPF 27.
  • the regeneration event evaluator may also provide information as to the predicted occurrence of the regeneration event to other control modules or portions of the engine control unit 26 to further control NOx emissions during a regeneration event.
  • the timing of the regeneration event may be used by the engine control unit 26 to manipulate engine operations, such as, for example, the fuel injection system, among others, so as to reduce the amount of exhaust gas being produced, and thus reduce the amount of NOx being produced, at or around the expected occurrence of the regeneration event. Reducing the amount of NOx upstream may allow for reducing the amount or rate of dosing ammonia needed for the NOx conversion in the SCR 22, and thereby reduce the amount of ammonia that may slip through the NPF 27 during the regeneration event.
  • the feed forwarded and feedback ammonia injection strategies of steps 130, 140 are compiled to create an actual ammonia dosing rate, shown at step 180.
  • the compiled dosing strategies therefore not only take into account the amount of NOx present in the exhaust gas upstream and downstream of the NPF 27, but also manage the amount of ammonia present in the NPF 27 in advance of the regeneration event and/or when the regeneration event is triggered.

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  • 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)

Abstract

L'invention porte sur un procédé pour gérer le dosage d'ammoniac pendant un événement de régénération pour un filtre à particules à oxyde d'azote (NPF), qui comprend un système de réduction catalytique sélective et un filtre à particules. Des modes de réalisation comprennent l'utilisation de changements de pression surveillés de part et d'autre du NPF pour prédire la charge de suie et le moment où la charge de suie atteint un niveau qui déclenche un événement de régénération. Le calage prédit de l'événement de régénération est utilisé pour utiliser l'ammoniac absorbé sur le NPF et ajuster la quantité ou le taux de dosage d'ammoniac pour gérer des niveaux d'ammoniac dans le NPF pendant l'événement de régénération. Avant l'événement de régénération, la quantité de dosage d'ammoniac peut être réduite de telle sorte que l'ammoniac dégagé du NPF est utilisé pour la conversion d'oxydes d'azote en azote gazeux et en eau. Lorsque l'ammoniac dégagé a été utilisé, la quantité de dosage d'ammoniac peut être augmentée de telle sorte que la conversion des oxydes d'azote se poursuit.
PCT/US2012/033777 2012-04-16 2012-04-16 Optimisation du dosage d'ammoniac pendant la régénération WO2013158063A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/394,838 US20150285124A1 (en) 2012-04-16 2012-04-16 Optimization of ammonia dosing during regeneration
PCT/US2012/033777 WO2013158063A1 (fr) 2012-04-16 2012-04-16 Optimisation du dosage d'ammoniac pendant la régénération

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2012/033777 WO2013158063A1 (fr) 2012-04-16 2012-04-16 Optimisation du dosage d'ammoniac pendant la régénération

Publications (1)

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WO2013158063A1 true WO2013158063A1 (fr) 2013-10-24

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Cited By (1)

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FR3029571A3 (fr) * 2014-12-09 2016-06-10 Renault Sa Procede de controle d'un dispositif de motorisation et dispositif de motorisation associe

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EP3284921B1 (fr) * 2013-05-27 2019-03-06 Volvo Truck Corporation Procédé de synchronisation d'un processus de régénération
FR3061515B1 (fr) * 2017-01-03 2019-05-24 Peugeot Citroen Automobiles Sa. Procede d’injection d’uree dans un catalyseur de reduction selective et systeme de post-traitement des gaz d’echappement d’un moteur thermique
EP3995675A1 (fr) * 2020-11-10 2022-05-11 Volvo Truck Corporation Procédé permettant de commander le fonctionnement d'un système de moteur dans un véhicule

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US7062904B1 (en) * 2005-02-16 2006-06-20 Eaton Corporation Integrated NOx and PM reduction devices for the treatment of emissions from internal combustion engines
US20110023462A1 (en) * 2009-07-29 2011-02-03 Ford Global Technologies, Llc Scr catalyst heating control

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3029571A3 (fr) * 2014-12-09 2016-06-10 Renault Sa Procede de controle d'un dispositif de motorisation et dispositif de motorisation associe

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