EP1209332A2 - Méthode et appareil de régénération d'un catalyseur accumulateur de NOx - Google Patents

Méthode et appareil de régénération d'un catalyseur accumulateur de NOx Download PDF

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Publication number
EP1209332A2
EP1209332A2 EP01250407A EP01250407A EP1209332A2 EP 1209332 A2 EP1209332 A2 EP 1209332A2 EP 01250407 A EP01250407 A EP 01250407A EP 01250407 A EP01250407 A EP 01250407A EP 1209332 A2 EP1209332 A2 EP 1209332A2
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EP
European Patent Office
Prior art keywords
regeneration
exhaust gas
oxygen
catalytic converter
internal combustion
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.)
Granted
Application number
EP01250407A
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German (de)
English (en)
Other versions
EP1209332A3 (fr
EP1209332B8 (fr
EP1209332B1 (fr
Inventor
Hermann Hahn
Ekkehard Pott
Sören HINZE
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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
Priority claimed from DE2000157938 external-priority patent/DE10057938A1/de
Priority claimed from DE2000157936 external-priority patent/DE10057936A1/de
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of EP1209332A2 publication Critical patent/EP1209332A2/fr
Publication of EP1209332A3 publication Critical patent/EP1209332A3/fr
Application granted granted Critical
Publication of EP1209332B1 publication Critical patent/EP1209332B1/fr
Publication of EP1209332B8 publication Critical patent/EP1209332B8/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the 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
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0802—Temperature of the exhaust gas treatment apparatus
    • F02D2200/0804—Estimation of the temperature of the exhaust gas treatment apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0806—NOx storage amount, i.e. amount of NOx stored on NOx trap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0814—Oxygen storage amount
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0816—Oxygen storage capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio

Definitions

  • the invention relates to methods for carrying out a regeneration of a NO x storage catalytic converter in an exhaust line of an internal combustion engine and devices for carrying out the regeneration with the features mentioned in the preambles of independent claims 1 to 3 or 20 or 21.
  • the NO x storage catalytic converter must be regenerated at recurring intervals.
  • the internal combustion engine is briefly switched to a rich or stoichiometric working mode ( ⁇ ⁇ 1).
  • ⁇ ⁇ ⁇ 1 a mass flow of reducing agent in the exhaust gas increases, the nitrogen oxides stored as nitrate are desorbed and converted catalytically on the NO x storage catalytic converter with simultaneous oxidation of CO and HC.
  • a regeneration period during which the rich exhaust gas atmosphere is applied to the storage catalytic converter is predefined.
  • the disadvantage of this is that an actual loading state of the NO x storage catalytic converter and a current regeneration rate thereof are not taken into account.
  • Such a procedure harbors the risk that the regeneration period is too short or too long, with in the first case an incomplete regeneration of the storage and in the second case an unnecessary increase in fuel consumption and an emission of environmentally harmful reducing agents (HC and CO).
  • Refined processes attempt to estimate an actual loading state of the NO x storage catalytic converter on the basis of certain operating parameters during the last lean phase and derive a necessary regeneration period from this.
  • this method also has considerable inaccuracies, so that unsuitable NO x regeneration times with the mentioned consequences can also result here.
  • the invention is therefore based on the object of providing a method for NO x regeneration of a NO x storage catalytic converter which is optimized with regard to the lowest possible reducing agent emission and at the same time ensures complete regeneration of the storage catalytic converter.
  • the process should run as quickly as possible, that is to say short regeneration times.
  • a device which is suitable and advantageous for carrying out the method is also to be provided.
  • the predefined signal threshold value can be determined in advance with sufficient reliability.
  • the method thus enables a reduction in CO and HC emissions and a minimization of an additional fuel consumption necessary for NO x regeneration.
  • the oxygen-dependent signal of the measuring device is extrapolated on the basis of current operating parameters of the internal combustion engine and / or the exhaust system.
  • these can include, for example, a current air / fuel mixture (combustion lambda) fed to the internal combustion engine and / or an exhaust gas mass flow and / or an exhaust gas temperature and / or a catalyst temperature.
  • the accuracy of the extrapolation can be further increased by taking into account a behavior model of the NO x storage catalytic converter.
  • a behavior model can include, for example, the course of a regeneration rate depending on the current reducing agent mass flow and / or the catalyst temperature.
  • the behavior model can also take into account the signal curve measured during the current regeneration.
  • An advantageous further development of the method can also be achieved by extrapolating the signal taking into account a behavior model of the oxygen-sensitive measuring device.
  • a behavior model of the oxygen-sensitive measuring device In particular, an inertia, that is to say a time delay with which the measuring device displays changed exhaust gas conditions, but also a current temperature of the measuring device measured, for example, via an internal resistance, can be taken into account.
  • the exhaust gas runtime as a fixed value preferably provided, this on the basis of current operating parameters of the Calculate internal combustion engine. It can be based on known operating parameters such as engine load, speed or exhaust gas temperature or other suitable data be resorted to.
  • a preferred embodiment of the method provides for specifying limit values for different operating conditions of the internal combustion engine and / or the exhaust system and suppressing the extrapolation if these limit values are not observed.
  • Limit values for the exhaust gas mass flow and / or for the temperature of the NO x storage catalytic converter are particularly useful, since the regeneration rates are too inconsistent if the exhaust gas mass flows are too high or the catalyst temperatures are too low to be able to be extrapolated with sufficient reliability.
  • the signal extrapolation can advantageously also be suppressed if there are interfering influences which depend on the operating point and which influence irregular NO x regeneration. This is the case, for example, in the case of a fuel cut-off of the internal combustion engine.
  • the Extrapolation not during the entire regeneration period of the Storage catalytic converter, but only after a specified time has elapsed Start of regeneration and / or after throughput of a predetermined exhaust gas mass and / or after a predetermined minimum threshold of the signal of the Measuring device.
  • the extrapolation according to the invention enables the exhaust gas runtime to be taken into account when changing the combustion lambda during regeneration, so that a reaction to an expected signal level can be anticipated to a certain extent. For example, it is possible to increase the combustion lambda before an undesirable reduction in the reducing agent, which is predicted by the extrapolation, and ultimately to reduce it or even to completely suppress it. Overall, the method thus enables a reduction in CO and HC emissions and a minimization of an additional fuel consumption required for NO X regeneration.
  • the (Theoretical) achievement of the predetermined for a regeneration termination Signal threshold value determined in advance can be timely means to break off before a reductant breakthrough occurs.
  • there are several alternatives at a time of this To determine increase For example, the increase after a Predeterminable portion of a determined by the extrapolation Total regeneration takes place.
  • the combustion lambda is even more advantageous when a second predetermined signal threshold value is reached by the to increase the extrapolated sensor signal taking into account the exhaust gas runtime, wherein the second signal threshold is usefully less than the first Signal threshold if it is a probe voltage.
  • the raise of the combustion lambda before the end of regeneration causes a reduction of a reducing agent mass flow at a time when only a small amount is left Amounts of nitrogen oxides stored in the storage catalytic converter to convert the Reducing agents are available. This measure thus eliminates the danger of a reducing agent breakthrough at the end of regeneration is additionally reduced. It has proven particularly useful to reduce the combustion lambda to lambda values of 0.94 to 0.99, in particular to 0.95 to 0.98.
  • the combustion lambda of the internal combustion engine is lowered below a previous lambda value until the extrapolated sensor signal reaches a third predetermined signal threshold value taking into account the exhaust gas runtime.
  • combustion lambda values from 0.6 to 0.9, in particular from 0.7 to 0.8, have proven particularly useful.
  • the NO x storage catalytic converter is consequently subjected to a comparatively very rich exhaust gas atmosphere, as long as the storage tank still has a minimum loading of nitrogen oxides marked by the third signal threshold. This at least temporarily very rich loading of the storage catalytic converter increases the efficiency of the NO x conversion, shortens the regeneration period and ultimately minimizes the additional fuel consumption to be used for the regeneration.
  • the Exceeded by the extrapolated sensor signal further variations of the Triggers combustion lambdas.
  • Additional threshold values can, for example an otherwise determined aging state of the storage catalytic converter consider. The various increases and / or decreases in the Air-fuel mixture to be supplied to the internal combustion engine can also gradually or even continuously.
  • the devices according to the invention include means by which the described Process steps are executable.
  • the means comprise a control unit in which a Algorithm for controlling the process steps is stored in digital form.
  • This Control unit can advantageously also be integrated into an engine control unit of the vehicle his.
  • the oxygen-sensitive measuring device can be a lambda probe arranged downstream of the NO x storage catalytic converter, in particular a broadband or a step response lambda probe, or a NO x sensor that has a lambda output signal.
  • the internal combustion engine 10 shown in FIG. 1 is assigned an exhaust gas system, designated overall by 12.
  • the exhaust system 12 comprises an exhaust duct 14, in which a pre-catalytic converter 16 arranged in a position close to the engine and a large-volume NO x storage catalytic converter 18 are arranged.
  • the exhaust gas duct 14 usually houses various gas and / or temperature sensors (not shown) for regulating the internal combustion engine 10.
  • Only an oxygen-sensitive measuring device 20 is shown here, which is arranged downstream of the NO x storage catalytic converter 18.
  • the measuring device 20 can be, for example, a lambda probe or a NO x sensor which is equipped with a lambda measuring function.
  • the measuring device 20 provides a signal U ⁇ that is dependent on an oxygen component of the exhaust gas.
  • This signal U ⁇ is transmitted to an engine control unit 22, in which it is digitized and further processed. Further information relating to the operating state of the internal combustion engine 10 is likewise input into the engine control unit 22.
  • a control unit 24 is integrated in the engine control unit 22, in which an algorithm for carrying out the method for NO x regeneration of the NO x storage catalytic converter 18 is stored.
  • the engine control unit 22 and the control unit 24 are capable of influencing at least one operating parameter of the internal combustion engine 10, in particular an air-fuel mixture to be supplied (combustion lambda), as a function of the signal U ⁇ of the measuring device, to be explained below.
  • FIG. 2 shows the course over time of various parameters of the internal combustion engine 10 and of the exhaust system 12 during a NO x regeneration of the NO x storage catalytic converter 18, which is carried out according to a conventional method.
  • the internal combustion engine 10 is in a lean operating mode, in which an oxygen-rich air-fuel mixture with ⁇ M >> 1 is fed to it (graph 100).
  • the exhaust gas contains an excess of nitrogen oxides NO x , which cannot be completely converted by the pre-catalyst 16.
  • NO x is therefore stored in the NO x storage catalytic converter 18, the NO x load of which increases continuously in the process (graph 102).
  • a suitable criterion a need for NO x regeneration is recognized at a time t A.
  • the internal combustion engine 10 is switched by influencing the engine control unit 22 in a rich operating mode with ⁇ F ⁇ 1.
  • NO is reduced x desorbed and nitrogen.
  • a decrease in the NO x loading (graph 102) of the storage catalytic converter 18 can, however, only be recorded after a certain time delay after switching over the internal combustion engine 10, since at time t A the exhaust gas duct 14 is still filled with lean exhaust gas, which initially still contains the storage catalytic converter 18 must happen before the reducing agents reach it.
  • the course of the NO x regeneration is meanwhile tracked with the aid of the signal U ⁇ provided by the measuring device 20 - as a rule a voltage.
  • the probe voltage U ⁇ (graph 104) is inversely proportional to an oxygen concentration of the exhaust gas downstream of the storage catalytic converter 18.
  • the signal U ⁇ of the measuring device 20 rises slowly.
  • the signal U ⁇ reaches a predetermined threshold value U SE , whereupon the internal combustion engine 10 is generally switched back to a lean operating mode with ⁇ M >> 1.
  • FIG. 3 The time course of the same parameters as in FIG. 2 is shown in FIG. 3 - this time during regeneration according to a first typical embodiment of the method according to the invention.
  • the signal U ⁇ of the measuring device 20 (graph 104) is first measured in a known manner and recorded.
  • the control unit 24 begins at a time t AH with an extrapolation of the signal U ⁇ .
  • the control unit 24 On the basis of selected operating parameters, the control unit 24 also calculates a time span ⁇ t that corresponds to the current exhaust gas runtime that the exhaust gas requires until the storage catalytic converter is reached. According to a first aspect of the invention, the time of the actual regeneration end t E is then determined by subtracting the exhaust gas runtime ⁇ t from the time t S. During the period T H , the extrapolation and thus the end of regeneration t E are continuously updated on the basis of current operating parameters and on the basis of the actual signal profile U ⁇ . When the end of regeneration t E determined in this way is reached, the internal combustion engine 10 is switched back to the lean operating mode with ⁇ M.
  • FIG. 4 The time profiles of the parameters according to an advantageous embodiment of a further method according to the invention, in which a predetermined combustion lambda is varied taking into account the extrapolated sensor signal U ⁇ and the exhaust gas runtime, is shown in FIG. 4.
  • the sensor signal U ⁇ graph 104) and Determination of the exhaust gas transit time ⁇ t analogously to the procedure explained in the context of FIG. 3.
  • the extrapolated sensor signal U ⁇ reaches a second signal threshold value U S2 , which is not shown for reasons of clarity and which is located between U S1 and U SE .
  • U S2 Reaching the signal threshold value U S2 signals that the NO x loading of the storage catalytic converter 18 is almost exhausted.
  • the combustion lambda is further increased to a value of ⁇ F4 close to 1.
  • ⁇ F4 is then typically 0.95 to 0.98.
  • the point in time t S at which the predetermined signal threshold value U SE is theoretically reached is also determined in accordance with the method shown in FIG.
  • the time of the (actual) regeneration end t E is then determined by subtracting the exhaust gas runtime ⁇ t from the time t S. If the end of regeneration t E determined in this way is reached, the internal combustion engine 10 is switched back to the lean operating mode with ⁇ M in order to prevent the pollutant breakthrough (graph 106).
  • the small amount of NO x (graph 102) still present in the storage catalytic converter 18 at this point ensures that the small proportion of reducing agent still contained in the exhaust gas is largely implemented.

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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)
  • Exhaust Gas After Treatment (AREA)
EP20010250407 2000-11-22 2001-11-21 Méthode et appareil de régénération d'un catalyseur accumulateur de NOx Expired - Lifetime EP1209332B8 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10057938 2000-11-22
DE2000157938 DE10057938A1 (de) 2000-11-22 2000-11-22 Verfahren und Vorrichtung zur Regeneration eines NOx-Speicherkatalysators
DE10057936 2000-11-22
DE2000157936 DE10057936A1 (de) 2000-11-22 2000-11-22 Verfahren und Vorrichtung zur Regeneration eines NOx-Speicherkatalysators

Publications (4)

Publication Number Publication Date
EP1209332A2 true EP1209332A2 (fr) 2002-05-29
EP1209332A3 EP1209332A3 (fr) 2004-06-09
EP1209332B1 EP1209332B1 (fr) 2008-06-25
EP1209332B8 EP1209332B8 (fr) 2008-08-13

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DE (1) DE50114044D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2424197A (en) * 2005-03-15 2006-09-20 Ford Global Tech Llc A method of adaptively controlling the regeneration of a lean nox trap
WO2009013609A2 (fr) * 2007-07-25 2009-01-29 Eaton Corporation Planification de la régénération d'un piège à nox en phase pauvre (lnt)
WO2005066468A3 (fr) * 2003-12-24 2009-03-12 Daimler Chrysler Ag Procede de regeneration d'un catalyseur a accumulation d'oxyde d'azote
GB2504975A (en) * 2012-08-15 2014-02-19 Gm Global Tech Operations Inc Method of controlling a DeSOx regeneration process of a Lean NOx Trap
FR3030620A1 (fr) * 2014-12-22 2016-06-24 Renault Sa Procede de purge d'un piege a oxydes d'azote et dispositif de motorisation associe
CN106523087A (zh) * 2015-09-15 2017-03-22 现代自动车株式会社 用于改善氮氧化物净化性能的控制方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0814031A (ja) * 1994-06-24 1996-01-16 Hitachi Ltd 内燃機関におけるｎｏ▲ｘ▼還元触媒の還元・吸着性能の判定とｎｏ▲ｘ▼低減方法
WO1999043420A1 (fr) * 1998-02-27 1999-09-02 Volkswagen Aktiengesellschaft PROCEDE DE REGULATION D'UN CATALYSEUR ABSORBEUR DE NOx
EP0940570A1 (fr) * 1998-01-09 1999-09-08 Ford Global Technologies, Inc. Procédé de régénération d'un piège à oxydes d'azote dans le système d' échappement d' un moteur à combustion interne avec prise en compte du débit massique de gaz d' échappement
DE19844082C1 (de) * 1998-09-25 1999-10-14 Siemens Ag Verfahren zum Regenerieren eines NOx-Speicherkatalysators
EP0997626A1 (fr) * 1998-10-28 2000-05-03 Renault Procédé de commande de la purge en oxydes d'azote d'un pot catalytique de traitement des gaz d'échappement d'un moteur à combustion interne
DE19915793A1 (de) * 1999-04-08 2000-10-19 Daimler Chrysler Ag Verfahren zur Desorption eines Stickoxidadsorbers einer Abgasreinigungsanlage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0814031A (ja) * 1994-06-24 1996-01-16 Hitachi Ltd 内燃機関におけるｎｏ▲ｘ▼還元触媒の還元・吸着性能の判定とｎｏ▲ｘ▼低減方法
EP0940570A1 (fr) * 1998-01-09 1999-09-08 Ford Global Technologies, Inc. Procédé de régénération d'un piège à oxydes d'azote dans le système d' échappement d' un moteur à combustion interne avec prise en compte du débit massique de gaz d' échappement
WO1999043420A1 (fr) * 1998-02-27 1999-09-02 Volkswagen Aktiengesellschaft PROCEDE DE REGULATION D'UN CATALYSEUR ABSORBEUR DE NOx
DE19844082C1 (de) * 1998-09-25 1999-10-14 Siemens Ag Verfahren zum Regenerieren eines NOx-Speicherkatalysators
EP0997626A1 (fr) * 1998-10-28 2000-05-03 Renault Procédé de commande de la purge en oxydes d'azote d'un pot catalytique de traitement des gaz d'échappement d'un moteur à combustion interne
DE19915793A1 (de) * 1999-04-08 2000-10-19 Daimler Chrysler Ag Verfahren zur Desorption eines Stickoxidadsorbers einer Abgasreinigungsanlage

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7946108B2 (en) 2003-12-24 2011-05-24 Daimler Ag Method for regenerating a nitrogen oxide storage catalytic converter
WO2005066468A3 (fr) * 2003-12-24 2009-03-12 Daimler Chrysler Ag Procede de regeneration d'un catalyseur a accumulation d'oxyde d'azote
GB2424197B (en) * 2005-03-15 2009-01-14 Ford Global Tech Llc A method for adaptively controlling the regeneration of a lean nox trap
GB2424197A (en) * 2005-03-15 2006-09-20 Ford Global Tech Llc A method of adaptively controlling the regeneration of a lean nox trap
US8006480B2 (en) 2007-07-25 2011-08-30 Eaton Corporation Physical based LNT regeneration strategy
WO2009013609A3 (fr) * 2007-07-25 2009-07-23 Eaton Corp Planification de la régénération d'un piège à nox en phase pauvre (lnt)
WO2009013609A2 (fr) * 2007-07-25 2009-01-29 Eaton Corporation Planification de la régénération d'un piège à nox en phase pauvre (lnt)
GB2504975A (en) * 2012-08-15 2014-02-19 Gm Global Tech Operations Inc Method of controlling a DeSOx regeneration process of a Lean NOx Trap
FR3030620A1 (fr) * 2014-12-22 2016-06-24 Renault Sa Procede de purge d'un piege a oxydes d'azote et dispositif de motorisation associe
WO2016102843A1 (fr) * 2014-12-22 2016-06-30 Renault S.A.S. Procédé de purge d'un piège a oxydes d'azote et dispositif de motorisation associe
RU2700177C2 (ru) * 2014-12-22 2019-09-13 Рено С.А.С. Способ продувки уловителя оксидов азота и соответствующая силовая установка
CN106523087A (zh) * 2015-09-15 2017-03-22 现代自动车株式会社 用于改善氮氧化物净化性能的控制方法
CN106523087B (zh) * 2015-09-15 2020-05-01 现代自动车株式会社 用于改善氮氧化物净化性能的控制方法

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DE50114044D1 (de) 2008-08-07
EP1209332B8 (fr) 2008-08-13
EP1209332B1 (fr) 2008-06-25

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