WO2003047732A1 - Verfahren und anlage zur regenerierung insbesondere desulfatisierung eines speicherkatalysators bei der abgasreinigung - Google Patents
Verfahren und anlage zur regenerierung insbesondere desulfatisierung eines speicherkatalysators bei der abgasreinigung Download PDFInfo
- Publication number
- WO2003047732A1 WO2003047732A1 PCT/DE2002/003952 DE0203952W WO03047732A1 WO 2003047732 A1 WO2003047732 A1 WO 2003047732A1 DE 0203952 W DE0203952 W DE 0203952W WO 03047732 A1 WO03047732 A1 WO 03047732A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exhaust gas
- catalytic converter
- storage catalytic
- reducing agent
- air ratio
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
-
- 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
- F02D41/028—Desulfurisation of NOx traps or adsorbent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9495—Controlling the catalytic process
-
- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
- F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/04—Sulfur or sulfur 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
Definitions
- the invention relates to a method for the regeneration, in particular desulfation, of storage catalytic converters in the exhaust gas purification of internal combustion engines, in which a reducing exhaust gas mixture with an air ratio ⁇ ⁇ 1 is generated during the regeneration phase and passed through the storage catalytic converter.
- the invention further relates to a system for the regeneration, in particular desulfation, of a storage catalytic converter for exhaust gas purification of an internal combustion engine with a supply device for supplying a reducing agent to the input side of the storage catalytic converter.
- Generic storage catalytic converters are used for cleaning the exhaust gases of an internal combustion engine (diesel engine), these nitrogen oxides (NO,) being removed from the exhaust gas stream by storage. Also Sulfur oxides (SO x ) are removed in this way.
- a storage catalytic converter is usually loaded with sintered oxides for up to approximately two minutes (depending on the operating point, only for approximately 0.3 to 1.0 minutes). The loaded catalyst must then be regenerated. In the regeneration phase, nitrogen oxides are reduced to nitrogen and released into the exhaust gas.
- a reducing environment (rich mixture) with a prevailing air ratio ⁇ ⁇ l is necessary for this emptying or regeneration process. The duration of these fat phases is approximately 1 to 30 seconds.
- the generation of the fat phases can either be carried out in the engine by suitable combustion management or post-engine by adding a reducing agent (e.g.
- Diesel fuel into the exhaust gas.
- the addition of reducing agents after the engine has the advantage that it can be carried out unnoticed by the driver regardless of the operating point of the engine. Requirements such as constant engine behavior, constant torque, constant noise and unchanged driving dynamics can be met when adding a reducing agent after the engine.
- Intervals are also desulfated. Desulfation is usually done with a fat one
- the reducing agent is on an oxidation catalyst with that contained in the exhaust gas
- US Pat. No. 6,199,373 B1 describes a process for the desulfurization of a NO y storage catalyst by burning off at temperatures of at least 675 ° C.
- a modulation of the air ratio with a certain frequency and amplitude is proposed, so that a temperature increase to the required values takes place in the storage catalytic converter connected downstream of a three-way catalytic converter.
- 0 2 , HC and CO are almost completely catalytically converted exothermically in the storage catalytic converter, which leads to the desired temperature increase.
- US Pat. No. 5,758,493 describes a method for desulfating a NO storage catalytic converter, in which part of the engine cylinders has a rich mixture and the other part a lean mixture during the sulfation process is working. Both exhaust gas flows are conducted separately to the storage catalytic converter in order to initiate a catalytic exothermic chemical reaction in the catalytic converter. The resulting temperature rise is therefore sufficient to remove SO * .
- US Pat. No. 5,979,159 discloses a method for desulfating a storage catalytic converter connected downstream of a three-way catalytic converter, in which an exothermic reaction is triggered in the three-way catalytic converter, as a result of which an exhaust gas stream of elevated temperature is generated which is used to desulfate the downstream storage catalytic converter.
- the regeneration of the storage catalytic converters mentioned is proposed, during the regeneration phase, the internal combustion engine first to be controlled in such a way that the air ratio is reduced to a first value ⁇ i and only then is the air ratio set to a second, lower value ⁇ 2 ⁇ 1 by adding a reducing agent after the engine.
- This combination of in-engine and post-engine measures to lower the air ratio allow the generation of a rich phase in two steps with the possibility to control and limit the exhaust gas temperatures better than before.
- the first lowering of the air ratio can take place in the method according to the invention without a significant increase in the exhaust gas temperature.
- an air ratio of ⁇ ⁇ 1 is set by adding a reducing agent after the engine, in which case one
- the internal engine control of the combustion carried out during the regeneration phase advantageously includes the following measures, all or in combination: increasing the exhaust gas recirculation rate, throttling the intake air and controlling the internal cylindrical combustion control or the injection process.
- the measures mentioned, alone or in combination, can contribute to reducing the oxygen content in the exhaust gas and thus reduce the air ratio ⁇ .
- the exothermic reactions that occur lead to the desired temperature increase, which should be about 600 ° C. in the case of desulfation.
- the invention ensures that the exhaust gas temperatures do not exceed 700 ° C., so that the storage catalytic converter can be safely desulfated without the risk of damage.
- a system according to the invention for the regeneration, in particular for the desulfation, of a storage catalytic converter for exhaust gas purification of an internal combustion engine contains a supply device for supplying a reducing agent to the input side of the
- Storage catalytic converter and at least one ⁇ -probe for determining the air ratio of the exhaust gas to be supplied to the storage catalytic converter, a control device for controlling the internal combustion engine being provided, which is in operative connection with the at least one ⁇ -probe and with the supply device for supplying a reducing agent.
- One possibility for determining an excessively high sulfur content in the catalytic converter, which makes desulfation necessary, is to measure the decrease in the NO x conversion of the storage catalytic converter by means of one or more sensors.
- control unit with this at least one sensor in operative connection.
- the control device of this system enables the control of the internal engine combustion depending on corresponding signals of the sensor or sensors which detect a decrease in the NO x conversion of the storage catalytic converter. This decrease can be due to the loading of the catalyst with N0 X , but also with SO x , as a result of which the NO x conversion decreases in both cases.
- the control device can now use the measures described above to control internal combustion in such a way that the air ratio is reduced to a first value.
- the air ratio is measured by means of a ⁇ probe and a corresponding signal is fed to the control unit. If the air ratio has dropped to the first value, the control unit can control the supply device for supplying a reducing agent in order to generate the rich mixture with an air ratio ⁇ ⁇ 1 necessary for the regeneration of the storage catalytic converter.
- the system according to the invention contains a temperature sensor, which is also operatively connected to the control unit, so that the temperature required for regeneration can be monitored and maintained.
- an oxidation catalytic converter upstream of the storage catalytic converter, on the input side of which the reducing agent is fed through the supply device.
- the reducing agent is in the oxidation catalyst with the Exhaust gas present catalytically exothermic, so that the actual temperature increase in this section is controlled.
- Solenoid valve and a supply line for the reducing agent The control unit can then directly control the solenoid valve.
- the figure shows an embodiment of the system according to the invention for regenerating a storage catalytic converter used in an exhaust gas cleaning system.
- the figure shows an embodiment of a system according to the invention in a schematic representation, this system forming part of an exhaust gas cleaning system by means of which a combustion
- exhaust gases mainly consist of nitrogen, carbon dioxide, oxygen and water as well as to a small extent from pollutants, which include carbon monoxide, unburned hydrocarbons, nitrogen oxides, lead compounds and particles (soot).
- Oxidative catalysts do not completely burn them Components, CO and HC (hydrocarbons) oxidized to carbon dioxide and water.
- Existing nitrogen oxides are eliminated by reduction catalysts, a storage catalytic converter 1 being used for this purpose in this embodiment.
- Storage catalytic converter 1 generates a rich phase in that a reducing agent (often diesel fuel itself) is metered into the exhaust gas.
- the supply is controlled by a solenoid valve 6.
- a ⁇ probe 7 is also arranged in the exhaust gas flow in order to measure the air ratio of the exhaust gas flowing to the oxidation catalytic converter 2.
- a control device 11 is provided which is operatively connected via line 19 to solenoid valve ⁇ and via line 20 to ⁇ probe 7.
- Two sensors 8 and 9 detect the NO x conversion of the
- Storage catalytic converter 1 the output signals generated being fed to control unit 11 via lines 16 and 17, respectively.
- a temperature sensor 10 is provided, which can supply signals to the control unit 11 via line 18.
- the control unit 11 is connected to those actuators which are responsible for the internal engine control of the combustion of the engine 12. In this embodiment it is
- Control unit 11 via line 13 with an actuator for controlling the exhaust gas recirculation, via line 14 with an actuator for controlling the start of injection and via line 15 with the throttle valve for throttling the intake air in connection.
- the system shown is particularly suitable for desulfurizing the storage catalytic converter 1, as will be described below.
- the sensors 8 and 9 detect the NO x conversion of the storage catalytic converter 1, which in the
- Control unit 11 is calculated. If it can be deduced from a decrease in the conversion or by another suitable method that the sulfur content in the catalyst 1 is too high, the desulfation is initiated. For this purpose, by influencing, for example, the exhaust gas recirculation, the start of injection and / or the throttle valve, the parameters determining the combustion in the engine 12 are changed such that the oxygen content in the exhaust gas is reduced. The latter is measured by a ⁇ probe 7. If the oxygen content is low enough - for example has reached a value of approximately 1.5 - a signal for opening the solenoid valve 6 is emitted via line 19 from the control unit 11, whereupon reducing agents (e.g. diesel fuel) can flow into the exhaust line.
- reducing agents e.g. diesel fuel
- This reducing agent is catalytically oxidized on the oxidation catalytic converter 2 with the oxygen contained in the exhaust gas, heat being released, which causes the temperature of the exhaust gas flowing to the storage catalytic converter 1 to increase.
- Storage catalytic converter 1 can detect and monitor the drop to a second, lower value of the air ratio ⁇ .
- the optional temperature sensor 10 on the input side 3 of the storage catalytic converter 1 measures exhaust gas temperatures for desulfation of about 600 ° C., ensuring that the exhaust gas temperatures are below 700 ° C., so that the storage catalytic converter 1 can be regenerated safely ,
- the invention enables safe desulfation of storage catalytic converters without the risk of damage due to excessive exhaust gas temperatures while at the same time minimally influencing the driving dynamics.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2003-7009938A KR20040063078A (ko) | 2001-11-29 | 2002-10-19 | 배기 가스 정화 시에 저장 촉매 컨버터의 재생, 특히탈황산화를 위한 방법 및 시스템 |
EP02782730A EP1450937A1 (de) | 2001-11-29 | 2002-10-19 | Verfahren und anlage zur regenerierung insbesondere desulfatisierung eines speicherkatalysators bei der abgasreinigung |
US10/470,523 US7181907B2 (en) | 2001-11-29 | 2002-10-19 | Method and system for regenerating, particularly desulfating, a storage-type catalytic converter during the purification of exhaust gases |
JP2003548979A JP2005511942A (ja) | 2001-11-29 | 2002-10-19 | 排ガス浄化の際に吸蔵触媒を再生する、特に脱硫するための方法および設備 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10158568A DE10158568A1 (de) | 2001-11-29 | 2001-11-29 | Verfahren und Anlage zur Regenerierung insbesondere Desulfatisierung eines Speicherkatalysators bei der Abgasreinigung |
DE10158568.3 | 2001-11-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003047732A1 true WO2003047732A1 (de) | 2003-06-12 |
Family
ID=7707373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/003952 WO2003047732A1 (de) | 2001-11-29 | 2002-10-19 | Verfahren und anlage zur regenerierung insbesondere desulfatisierung eines speicherkatalysators bei der abgasreinigung |
Country Status (6)
Country | Link |
---|---|
US (1) | US7181907B2 (de) |
EP (1) | EP1450937A1 (de) |
JP (1) | JP2005511942A (de) |
KR (1) | KR20040063078A (de) |
DE (1) | DE10158568A1 (de) |
WO (1) | WO2003047732A1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1469180A2 (de) * | 2003-04-15 | 2004-10-20 | Toyota Jidosha Kabushiki Kaisha | Verfahren zur Regelung eines NOx-Speicherkatalysators |
JP2005226463A (ja) * | 2004-02-10 | 2005-08-25 | Isuzu Motors Ltd | 排気ガス浄化方法及び排気ガス浄化システム |
EP1741890A3 (de) * | 2005-07-06 | 2007-03-07 | Kabushiki Kaisha Toyota Jidoshokki | Abgasreinigunsvorrichtung für eine Brennkraftmaschine |
WO2010060503A1 (de) * | 2008-11-29 | 2010-06-03 | Daimler Ag | Verfahren zum betreiben eines dieselmotors mit einer einen stickoxid-speicherkatalysator aufweisenden abgasreinigungsanlage |
EP2746557A1 (de) * | 2012-12-18 | 2014-06-25 | Hyundai Motor Company | Steuerungsverfahren für einen LNT eines Fahrzeugs |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7018442B2 (en) * | 2003-11-25 | 2006-03-28 | Caterpillar Inc. | Method and apparatus for regenerating NOx adsorbers |
JP4561467B2 (ja) * | 2005-05-16 | 2010-10-13 | いすゞ自動車株式会社 | 排気ガス浄化方法及び排気ガス浄化システム |
US20070095053A1 (en) * | 2005-10-31 | 2007-05-03 | Arvin Technologies, Inc. | Method and apparatus for emissions trap regeneration |
FR2927372A1 (fr) * | 2008-02-12 | 2009-08-14 | Renault Sas | Procede de commande d'alimentation en carburant d'une ligne d'echappement d'un moteur a combustion et dispositif mettant en oeuvre le procede |
US8459010B2 (en) * | 2010-02-26 | 2013-06-11 | General Electric Company | System and method for controlling nitrous oxide emissions of an internal combustion engine and regeneration of an exhaust treatment device |
DE102011102047A1 (de) | 2011-05-19 | 2012-11-22 | Man Truck & Bus Ag | Verfahren und Vorrichtung zur Desulfatisierung einer in einer Diesel-Brennkraftmaschine angeordneten Abgasreinigungseinrichtung |
JP2015048767A (ja) * | 2013-08-30 | 2015-03-16 | 本田技研工業株式会社 | 内燃機関の制御装置 |
US10690079B2 (en) * | 2017-12-12 | 2020-06-23 | GM Global Technology Operations LLC | Method for diagnosing and controlling ammonia oxidation in selective catalytic reduction devices |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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GB2328626A (en) * | 1996-04-26 | 1999-03-03 | Komatsu Mfg Co Ltd | Apparatus and method for regenerating NOx catalyst for diesel engines |
US6058700A (en) * | 1997-05-26 | 2000-05-09 | Toyota Jidosha Kabushiki Kaisha | Device for purifying exhaust gas of engine |
FR2809767A1 (fr) * | 2000-06-01 | 2001-12-07 | Toyota Motor Co Ltd | Dispositif de purification de gaz d'echappement d'un moteur a combustion interne |
Family Cites Families (11)
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US5758493A (en) | 1996-12-13 | 1998-06-02 | Ford Global Technologies, Inc. | Method and apparatus for desulfating a NOx trap |
JP3645704B2 (ja) * | 1997-03-04 | 2005-05-11 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
US5974788A (en) | 1997-08-29 | 1999-11-02 | Ford Global Technologies, Inc. | Method and apparatus for desulfating a nox trap |
US5979159A (en) | 1998-03-16 | 1999-11-09 | Ford Global Technologies, Inc. | Exhaust after-treatment system for automotive vehicle |
US6233925B1 (en) * | 1998-08-28 | 2001-05-22 | Toyota Jidosha Kabushiki Kaisha | Exhaust discharge control device for internal combustion engine |
DE19910503C1 (de) * | 1999-03-10 | 2000-07-06 | Daimler Chrysler Ag | Verfahren und Vorrichtung zur periodischen Desulfatisierung eines Stickoxid- oder Schwefeloxid-Speichers mit Fett/Mager-Motorzylinderaufteilung |
US6189316B1 (en) | 1999-05-19 | 2001-02-20 | Ford Global Technologies, Inc. | Emission device temperature control system |
JP3607980B2 (ja) * | 1999-12-16 | 2005-01-05 | トヨタ自動車株式会社 | 内燃機関 |
US20030113242A1 (en) * | 2001-12-18 | 2003-06-19 | Hepburn Jeffrey Scott | Emission control device for an engine |
US6735940B2 (en) * | 2002-07-11 | 2004-05-18 | Fleetguard, Inc. | Adsorber aftertreatment system having dual adsorbers |
US6779339B1 (en) * | 2003-05-02 | 2004-08-24 | The United States Of America As Represented By The Environmental Protection Agency | Method for NOx adsorber desulfation in a multi-path exhaust system |
-
2001
- 2001-11-29 DE DE10158568A patent/DE10158568A1/de not_active Ceased
-
2002
- 2002-10-19 WO PCT/DE2002/003952 patent/WO2003047732A1/de active Application Filing
- 2002-10-19 JP JP2003548979A patent/JP2005511942A/ja active Pending
- 2002-10-19 KR KR10-2003-7009938A patent/KR20040063078A/ko not_active Application Discontinuation
- 2002-10-19 EP EP02782730A patent/EP1450937A1/de not_active Withdrawn
- 2002-10-19 US US10/470,523 patent/US7181907B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2328626A (en) * | 1996-04-26 | 1999-03-03 | Komatsu Mfg Co Ltd | Apparatus and method for regenerating NOx catalyst for diesel engines |
US6058700A (en) * | 1997-05-26 | 2000-05-09 | Toyota Jidosha Kabushiki Kaisha | Device for purifying exhaust gas of engine |
FR2809767A1 (fr) * | 2000-06-01 | 2001-12-07 | Toyota Motor Co Ltd | Dispositif de purification de gaz d'echappement d'un moteur a combustion interne |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1469180A2 (de) * | 2003-04-15 | 2004-10-20 | Toyota Jidosha Kabushiki Kaisha | Verfahren zur Regelung eines NOx-Speicherkatalysators |
EP1469180A3 (de) * | 2003-04-15 | 2005-05-25 | Toyota Jidosha Kabushiki Kaisha | Verfahren zur Regelung eines NOx-Speicherkatalysators |
JP2005226463A (ja) * | 2004-02-10 | 2005-08-25 | Isuzu Motors Ltd | 排気ガス浄化方法及び排気ガス浄化システム |
JP4492145B2 (ja) * | 2004-02-10 | 2010-06-30 | いすゞ自動車株式会社 | 排気ガス浄化方法及び排気ガス浄化システム |
EP1741890A3 (de) * | 2005-07-06 | 2007-03-07 | Kabushiki Kaisha Toyota Jidoshokki | Abgasreinigunsvorrichtung für eine Brennkraftmaschine |
WO2010060503A1 (de) * | 2008-11-29 | 2010-06-03 | Daimler Ag | Verfahren zum betreiben eines dieselmotors mit einer einen stickoxid-speicherkatalysator aufweisenden abgasreinigungsanlage |
EP2746557A1 (de) * | 2012-12-18 | 2014-06-25 | Hyundai Motor Company | Steuerungsverfahren für einen LNT eines Fahrzeugs |
US8784758B2 (en) | 2012-12-18 | 2014-07-22 | Hyundai Motor Company | LNT control method for vehicle |
Also Published As
Publication number | Publication date |
---|---|
US7181907B2 (en) | 2007-02-27 |
KR20040063078A (ko) | 2004-07-12 |
DE10158568A1 (de) | 2003-06-26 |
EP1450937A1 (de) | 2004-09-01 |
JP2005511942A (ja) | 2005-04-28 |
US20040148927A1 (en) | 2004-08-05 |
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