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WO2011138277A1 - Procédé permettant de faire fonctionner un moteur à combustion interne - Google Patents

Procédé permettant de faire fonctionner un moteur à combustion interne Download PDF

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Publication number
WO2011138277A1
WO2011138277A1 PCT/EP2011/056958 EP2011056958W WO2011138277A1 WO 2011138277 A1 WO2011138277 A1 WO 2011138277A1 EP 2011056958 W EP2011056958 W EP 2011056958W WO 2011138277 A1 WO2011138277 A1 WO 2011138277A1
Authority
WO
WIPO (PCT)
Prior art keywords
catalyst
surface coverage
gas concentration
cell
current state
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2011/056958
Other languages
German (de)
English (en)
Inventor
Bernd Hollauf
Christian Roduner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AVL List GmbH
Original Assignee
AVL List 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 AVL List GmbH filed Critical AVL List GmbH
Publication of WO2011138277A1 publication Critical patent/WO2011138277A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/005—Electrical control of exhaust gas treating apparatus using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly
    • 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
    • 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
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0406—Methods of control or diagnosing using a model with a division of the catalyst or filter in several cells
    • 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
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0408—Methods of control or diagnosing using a feed-back loop
    • 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
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • 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
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1402—Exhaust gas composition
    • 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
    • F01N2900/1622—Catalyst reducing agent absorption capacity or consumption 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

  • the invention relates to a method for operating an internal combustion engine, wherein upstream of a urea-based catalyst in an exhaust line, a reducing agent is injected depending on the current state of the surface coverage of the catalyst with respect to a reference component and / or the gas concentration of a reference gas in the catalyst based on a mathematical model.
  • the ammonia loading (surface coverage with ammonia) of the SCR catalyst has a direct influence on its performance in terms of achievable NOx reduction and resulting NH 3 breakthrough. Due to the fact that the current ammonia loading of the SCR catalytic converter is not metrologically detectable, models must be used, which estimate the current NH 3 loading of the SCR catalyst.
  • DE 103 47 130 A1 and DE 103 47 132 A1 each describe a method for estimating an amount of ammonia stored in a urea-based SCR catalyst on the basis of a dynamic model of the catalyst.
  • the model takes into account the chemical and physical properties of the catalyst, such as catalyst volume, the number of available ammonia storage locations, adsorption and desorption dynamics, as well as poisoning, thermal aging, and various catalyst operating temperatures, and generates the estimate on the basis a measured or estimated amount of NO x in an exhaust gas mixture upstream of the catalyst based on an amount of reductant injected into the catalyst based on a measured value of NO x in an exhaust gas mixture downstream of the catalyst.
  • the estimated amount of stored ammonia is then used to maintain the desired amount of ammonia storage to achieve maximum ⁇ conversion efficiency associated with minimal ammonia outgassing.
  • WO 2008/009940 A2 describes a method for controlling the supply of a ⁇ -reducing substance to a catalyst.
  • the NO entering the catalyst x is determined quantity, and controlling the amount of injected reducing agent based on a model for the entering into the catalyst reducing agent.
  • Zero-dimensional models are in use in SCR dosing strategies. Zero-dimensional means that there is no local information (eg in gas flow direction) available about NH 3 loading and gas concentrations. However, because of the principle that the NH 3 charge and the gas concentrations in a SCR catalyst change significantly in the gas flow direction (pipe reactor principle), zero-dimensional models are relatively inaccurate in estimating the current state of the SCR catalyst and often require additional sensors to compensate for these deficiencies.
  • a one-dimensional SCR catalyst model is described in this embodiment for real-time applications in SCR dosing strategies, and how this additional information of the local distribution of NH 3 charge and gas concentrations can be used.
  • the object of the invention is to avoid these disadvantages and to allow in the simplest possible way accurate control of the reducing agent to be injected.
  • this is achieved by using a simplified one-dimensional catalytic converter model with adjacent cells arranged one behind the other in the flow direction for determining the current state of the surface coverage and / or the gas concentration of the catalyst, that the actual values for the current state of the surface coverage and / or the gas concentration of each Cell and / or the entire catalyst and compared with defined setpoints for each cell and / or for the entire catalyst and that due to the difference between actual and set values of the current state of the surface coverage and / or the gas concentration, the supply of the reducing agent in one closed loop is regulated.
  • the actual values of the current state of the surface coverage and / or the gas concentration of each cell are compared with target values of the current state of the surface coverage and / or the gas concentration of each cell.
  • an actual value, preferably an average, of the actual state of the surface coverage and / or the gas concentration of each cell for the current state of the surface coverage and / or the gas concentration of the velvet catalyst is determined and the actual value for the current state of the surface coverage and / or the gas concentration of the catalyst is compared with a target value of the current state of the surface coverage and / or the gas concentration of the entire catalyst.
  • the model only considers the adsorption and desorption of NH 3 at the catalyst surface.
  • reaction products The adsorption of reaction products is not considered.
  • each cell has the behavior of a perfect heat exchanger. Therefore, the exit temperature of the gas of each cell is equal to the temperature of the cell itself.
  • reaction enthalpies in the energy balance are small compared to the thermal inertia of the SCR catalyst and thus can be neglected.
  • a real-time mathematical model can be computed using inhomogeneous nonlinear mathematical models. Couple ordinary differential equations are set up by the SCR catalyst. It is therefore possible that, for each cell of the real-time model, the information on the actual NH 3 surface coverage, the concentration of the gas constituents considered (c N o, c N 02, c N H3, C02) and the temperature (T c ) are known.
  • the electronic control unit (ECU) of the vehicle is suitable.
  • setpoint values for the surface coverage and / or gas concentration are stored in a data memory or determined analytically.
  • the actual values for the surface coverage and / or gas concentration of the catalyst determined with the model are compared with the desired values continuously or at certain intervals, and the injection of the reducing agent is carried out using a closed loop.
  • FIGS. Fig. 1 shows schematically the control system according to the invention
  • Fig. 2 shows the catalyst model used
  • FIG. 3 and Fig. 4 embodiments of the method according to the invention.
  • an SCR catalytic converter 13 for exhaust gas aftertreatment is arranged in the exhaust gas line 12 of an internal combustion engine 11. Upstream of the SCR catalytic converter 13, a metering device 14 for reducing agent and at least one exhaust gas sensor 15 and / or an exhaust gas model for NO x determination and / or temperature measurement are positioned. Based on the data of the exhaust gas sensor 15 and the exhaust model, the amount of reductant supplied is controlled via an electronic control unit 16.
  • control unit 16 uses a control algorithm 17, which uses the information about the current state of the surface coverage as well as the gas concentrations from the real-time capable model 18 of the catalytic converter 13.
  • the catalyst 13 is divided downstream into cells 1, 2, n and based on the sensor or model data of the inputs the surface coverage and / or the concentration of the gas components NO, N0 2 , NH 3 and 0 2 of Cells 1, 2, ..., n, and their temperatures T c of the cells 1, 2, n determined.
  • the current actual values for the surface coverage 0 NH 3 to NH 3 and the gas concentration c N H3 of ammonia are - for each cell separately or as an average of all cells 1, 2, ..., n - in the electronic control unit 16 with given Should- Values 0 des , c des and, due to the difference, the metering device 14 for the reducing agent is suitably activated.
  • an SCR catalyst 13 is a so-called tubular reactor.
  • Tubular reactors have the property that the change in gas concentrations is location and time dependent. These reactors are mathematically described by partial differential equations. Since such a model can not be calculated on an engine control unit in real time, the tube reactor performance of the SCR catalyst 13 is approximated by a cascade connection of CSTR (Continuous Stirred Tank Reactor) stirred tanks. Stirred tanks can be described with ordinary differential equations and are therefore suitable for implementation in the engine control unit.
  • CSTR Continuous Stirred Tank Reactor
  • the SCR catalyst volume is divided into a sufficient number of stirred tanks in the gas flow direction to approximate the tubular reactor behavior.
  • the series connection of the stirred tank gives the information of the local distribution in the gas flow direction of gas concentrations as well as the loading within the SCR catalyst.
  • this one-dimensional model approach allows for a decisive improvement in model quality.
  • FIG. 2 schematically shows the one-dimensional modeling approach by means of the stirred tank cascade.
  • the input is denoted by 20 and the output by 21.
  • the flow direction is indicated by the arrow 22.
  • reaction temperatures are constructed as follows:
  • Examples 1 and 2 are shown summarized in Fig. 3.
  • the information 25 about the NH 3 surface coverage ⁇ ⁇ ⁇ 3 or NH 3 gas concentration c N H3 is collected for each cell 1, 2, n.
  • the actual value of the NH 3 cranenbe ⁇ cover ⁇ ⁇ ⁇ 3 or the NH 3 gas concentration c N H3 of the SCR model is formed in step 26 as the average of all cells or collected by selecting certain cells and compared with predetermined setpoints 0 Des , c des .
  • Due to the Re ⁇ geldifferenz 27 via the regulator 17 z. B. PI, PID, PD, IPD, LQR etc
  • the regulator 17 z. B. PI, PID, PD, IPD, LQR etc
  • Example 3 is shown in FIG. 4 illustrates.
  • the information 25 about the NH 3 surface coverage ⁇ ⁇ ⁇ 3 is collected.
  • the actual value of the NH 3 surface coverage ⁇ ⁇ ⁇ 3 the SCR model is formed as a mean 9 N H3, mean all the cells in step 26 and compared with the pre- ⁇ transmitted setpoint 0 Des. Due to the control difference 27, the reducing agent is appropriately added to the exhaust gas in the exhaust gas line 12 upstream of the SCR catalytic converter 13 via the regulator 17 (eg PI, PID, PD, IPD, LQR etc.).
  • the NH 3 gas concentration c NH3 of a selected cell for example the NH 3 gas concentration c N H3, n of the last cell n is determined with the 1D-SCR model and compared with a maximum allowable value c N H3, max. If an exceeding of the NH 3 gas concentration c N H3, max is detected in the last cell n, then the regulator 17 is bypassed via the switch 28 and, independently of the control difference, reducing agent is metered into the exhaust gas via the metering device 14. Unlike known methods, no NH 3 sensor is needed in the SCR catalyst since this information is estimated by the 1D SCR model.

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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)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un procédé permettant de faire fonctionner un moteur à combustion interne (11), selon lequel un agent réducteur est injecté, en amont d'un catalyseur (13) à base d'urée dans une ligne d'échappement (12), sur la base d'un modèle mathématique (18) en fonction de l'état actuel de la couverture de la surface du catalyseur (13) en ce qui concerne un composant de référence et/ou de la concentration des gaz dans le catalyseur (13). L'invention vise à permettre de manière aussi simple que possible un acheminement optimal de l'agent réducteur. A cet effet, pour déterminer l'état actuel de la couverture de la surface et/ou de la concentration des gaz du catalyseur (13), on utilise un modèle de catalyseur (18) unidimensionnel simplifié avec des cellules (1, 2,..., n) adjacentes disposées les unes derrière les autres dans le sens de l'écoulement. A partir de données de mesure issues d'au moins une mesure d'un capteur en amont du catalyseur (13), les valeurs réelles pour l'état actuel de la couverture de surface et/ou de la concentration des gaz de chaque cellule (1, 2,..., n) et/ou de la totalité du catalyseur (13) sont déterminées et sont comparées à des valeurs théoriques définies pour chaque cellule (1, 2,..., n) et/ou pour la totalité du catalyseur (13), et à partir de l'écart entre les valeurs réelles et les valeurs théoriques de la couverture de surface et/ou de la concentration des gaz, l'acheminement de l'agent réducteur est réglé dans un circuit de réglage fermé.
PCT/EP2011/056958 2010-05-04 2011-05-02 Procédé permettant de faire fonctionner un moteur à combustion interne Ceased WO2011138277A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA759/2010 2010-05-04
AT0075910A AT507865A2 (de) 2010-05-04 2010-05-04 Verfahren zum betreiben einer brennkraftmaschine

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WO2011138277A1 true WO2011138277A1 (fr) 2011-11-10

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8623305B2 (en) 2011-10-24 2014-01-07 Ford Global Technologies, Llc Method for controlling an injection device for feeding an ammonia-releasing reducing agent into an exhaust-gas purification system of an internal combustion engine
US8834820B1 (en) 2013-06-14 2014-09-16 Caterpillar Inc. Adaptive catalytic conversion and reduction agent control
WO2016145468A1 (fr) * 2015-03-16 2016-09-22 Avl List Gmbh Procédé servant à déterminer la concentration au moins d'un produit de réaction à la sortie d'un catalyseur
WO2018106174A1 (fr) 2016-12-08 2018-06-14 Scania Cv Ab Procédé et système de commande d'un profil de degré de couverture d'ammoniac
CN110685784A (zh) * 2018-07-04 2020-01-14 上海交通大学 一种农机发动机后处理scr系统尿素品质检测装置及方法
IT201800020851A1 (it) * 2018-12-21 2020-06-21 Fpt Motorenforschung Ag Metodo e dispositivo di controllo di almeno un convertitore catalitico scr di un veicolo

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017207767B4 (de) * 2017-05-09 2020-06-25 Ford Global Technologies, Llc Verfahren zur Emissionskontrolle von Stickoxiden und/oder Ammoniak

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DE10347132A1 (de) 2002-11-21 2004-06-17 Ford Global Technologies, LLC, Dearborn Abgasnachbehandlungssysteme
DE10347130A1 (de) 2002-11-21 2004-06-17 Ford Global Technologies, LLC, Dearborn Abgasnachbehandlungssysteme
US20070125071A1 (en) * 2004-01-20 2007-06-07 Bjorn Westerberg Method and device for controlling the injection of reducing agent
EP1801374A1 (fr) * 2004-08-09 2007-06-27 Hino Motors, Ltd. Procédé de contrôle des appareils de purification des gaz d'échappement
WO2008009940A2 (fr) 2006-07-20 2008-01-24 Ricardo Uk Limited Modulation d'une réduction catalytique sélective
US20090031710A1 (en) * 2007-07-31 2009-02-05 Caterpillar Inc. SCR emissions control system
US20090049827A1 (en) * 2007-08-23 2009-02-26 Zhiyong Wei Emission control system implementing reduction agent injection

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DE10347132A1 (de) 2002-11-21 2004-06-17 Ford Global Technologies, LLC, Dearborn Abgasnachbehandlungssysteme
DE10347130A1 (de) 2002-11-21 2004-06-17 Ford Global Technologies, LLC, Dearborn Abgasnachbehandlungssysteme
US20070125071A1 (en) * 2004-01-20 2007-06-07 Bjorn Westerberg Method and device for controlling the injection of reducing agent
EP1801374A1 (fr) * 2004-08-09 2007-06-27 Hino Motors, Ltd. Procédé de contrôle des appareils de purification des gaz d'échappement
WO2008009940A2 (fr) 2006-07-20 2008-01-24 Ricardo Uk Limited Modulation d'une réduction catalytique sélective
US20090031710A1 (en) * 2007-07-31 2009-02-05 Caterpillar Inc. SCR emissions control system
US20090049827A1 (en) * 2007-08-23 2009-02-26 Zhiyong Wei Emission control system implementing reduction agent injection

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Title
MARK SHOST: "Monitoring, Feedback and Control of Urea SCR Dosing Systems for NOx Reduction: Utilizing an Embedded Model and Ammonia Sensing", SAE-PAPER 2008-01-1325

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8623305B2 (en) 2011-10-24 2014-01-07 Ford Global Technologies, Llc Method for controlling an injection device for feeding an ammonia-releasing reducing agent into an exhaust-gas purification system of an internal combustion engine
US8834820B1 (en) 2013-06-14 2014-09-16 Caterpillar Inc. Adaptive catalytic conversion and reduction agent control
WO2016145468A1 (fr) * 2015-03-16 2016-09-22 Avl List Gmbh Procédé servant à déterminer la concentration au moins d'un produit de réaction à la sortie d'un catalyseur
WO2018106174A1 (fr) 2016-12-08 2018-06-14 Scania Cv Ab Procédé et système de commande d'un profil de degré de couverture d'ammoniac
US11035274B2 (en) 2016-12-08 2021-06-15 Scania Cv Ab Method and system for controlling an ammonia coverage degree profile
CN110685784A (zh) * 2018-07-04 2020-01-14 上海交通大学 一种农机发动机后处理scr系统尿素品质检测装置及方法
CN110685784B (zh) * 2018-07-04 2021-09-07 上海交通大学 一种农机发动机后处理scr系统尿素品质检测装置及方法
IT201800020851A1 (it) * 2018-12-21 2020-06-21 Fpt Motorenforschung Ag Metodo e dispositivo di controllo di almeno un convertitore catalitico scr di un veicolo
WO2020128822A1 (fr) * 2018-12-21 2020-06-25 Fpt Motorenforschung Ag Procédé et dispositif de commande d'au moins un convertisseur catalytique de rcs d'un véhicule
US12104516B2 (en) 2018-12-21 2024-10-01 Fpt Motorenforschung Ag Method and device for controlling at least one SCR catalytic converter of a vehicle

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