WO2004104388A1 - Installation d'epuration des gaz d'echappement pour moteur a combustion interne - Google Patents
Installation d'epuration des gaz d'echappement pour moteur a combustion interne Download PDFInfo
- Publication number
- WO2004104388A1 WO2004104388A1 PCT/EP2004/005319 EP2004005319W WO2004104388A1 WO 2004104388 A1 WO2004104388 A1 WO 2004104388A1 EP 2004005319 W EP2004005319 W EP 2004005319W WO 2004104388 A1 WO2004104388 A1 WO 2004104388A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exhaust gas
- particle filter
- catalyst
- internal combustion
- catalytic converter
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—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
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2250/00—Combinations of different methods of purification
- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
-
- 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
- F01N2250/00—Combinations of different methods of purification
- F01N2250/12—Combinations of different methods of purification absorption or adsorption, and catalytic conversion
-
- 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
- F01N2250/00—Combinations of different methods of purification
- F01N2250/14—Combinations of different methods of purification absorption or adsorption, and filtering
-
- 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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/48—Honeycomb supports characterised by their structural details characterised by the number of flow passages, e.g. cell density
-
- 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
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
Definitions
- the invention relates to an exhaust gas purification system for an internal combustion engine according to the preamble of patent claim 1.
- DE 197 18 727 C2 discloses a method for treating the exhaust gas of a diesel engine to reduce the particle emission by passing the diesel exhaust gas through two diesel exhaust gas catalysts connected in series in the form of honeycomb bodies with parallel flow channels, the wall surfaces of which are catalytically active Coating are provided.
- the upstream first catalyst has a cell density of less than 40 to 80 flow channels per square centimeter, while the cell density of the downstream second catalyst is greater than that of the first catalyst.
- the object of the present invention is to provide an exhaust gas purification system for an internal combustion engine which allows honeycomb catalysts with very high cell densities to be used for the purification of diesel exhaust gases, since a further tightening of the exhaust gas limit values for diesel engines not only reduces the particle emissions, but also requires a further improvement in the exhaust gas limit values for gaseous pollutants.
- an exhaust gas purification system for an internal combustion engine for this purpose, which, viewed in the flow direction of the exhaust gas, has a particle filter close to the engine and at least one catalyst downstream of the particle filter, in which the at least one catalyst arranged downstream of the particle filter has a cell density range of approximately 900 to 2000 cpsi, preferably approximately 900 to 1600 cpsi.
- a further developed according to claim 2 emission control system is provided with a catalytic coating. Furthermore, the at least one catalytic converter arranged downstream of the particle filter is a NO x storage catalytic converter and / or an SCR catalytic converter.
- the at least one catalytic converter arranged downstream of the particle filter has the functions of a NO x storage catalytic converter and an SCR catalytic converter.
- the filter undergoes in the close-coupled mounting position higher operating temperatures, ie, it benefits from the so-called CRT effect (Continuous Regeneration Trap), the reaction between N0 X and carbon black. This leads to a permanent soot regeneration of the particle filter, whereby the frequency of the active filter regeneration can be significantly reduced.
- CRT effect Continuous Regeneration Trap
- all restrictions in the selection of catalysts and / or supports are eliminated, since the contaminants from the diesel exhaust gas from the upstream particle filter are eliminated.
- more powerful high-cell catalysts can be used, which would otherwise be added quickly due to the particle emissions described above.
- Fig. 4 is a schematic representation of a third embodiment of the invention.
- FIG. 1 shows an arrangement for exhaust gas aftertreatment from the prior art.
- Particle filters and catalysts are used in combination in the exhaust gas of internal combustion engines.
- the particle filter 1 the activity of which is temperature-independent, is installed remotely from the engine and others Catalysts A, B, C to reduce the gaseous pollutants that require higher temperatures for their activities, as close to the engine as possible.
- This arrangement results in the catalytic converters starting early after the cold start.
- the cell density of the catalysts is limited here by the particles from the exhaust gas in order to avoid clogging of the cells.
- the arrangement for exhaust gas aftertreatment according to the invention in FIG. 2 shows a particle filter 1 arranged close to the engine.
- the particle filter 1 can be arranged either in the exhaust manifold or before or after the exhaust gas turbocharger of the diesel engine.
- the particle filter 1 can be regenerated, and in the case of soot separation in the diesel engine exhaust line, the regeneration by the oxidation of the soot either by nitrogen dioxide (N0 2 ) at a temperature above about 200 ° C. or with air or oxygen (0 2 ) eg temperatures above 500 ° C or by injection of an additive (eg a cerium compound).
- N0 2 nitrogen dioxide
- air or oxygen eg temperatures above 500 ° C
- an additive eg a cerium compound
- At least one catalyst 2, 3, 4 is arranged downstream of the particle filter 1 and has a cell density range of approximately 900 to 2000 cpsi, preferably a cell density range of approximately 900 to 1600 cpsi.
- Metal, but preferably ceramic, catalysts are used for exhaust gas aftertreatment.
- the catalysts used in the embodiment of 2 are preferably a NO x storage catalytic converter (NSK) (2) or an SCR catalytic converter (3).
- FIG. 3 shows an example of a variant of the arrangement for exhaust gas aftertreatment from FIG. 1, for the sake of clarity the same reference numerals being used for identical or equivalent components and in this respect reference can be made to the description above for FIG. 1. Otherwise, the advantages mentioned in FIG. 2 and in the general part of the description also apply to the embodiment according to the invention in FIG. 3 and all the embodiments mentioned below.
- 3 includes an NO x storage catalytic converter (NSK) (2) and then an SCR catalytic converter (3) in the exhaust gas flow direction downstream of an internal combustion engine, downstream of the particle filter 1 arranged close to the engine. The order can also be reversed, so that the SCR catalytic converter (3) is arranged in front of the NO x storage catalytic converter (NSK) (2).
- FIG. 4 A further variant according to the invention is shown in FIG. 4, in which an integrated exhaust gas catalytic converter unit (4) with NO x storage catalytic converter (NSK) and SCR catalytic converter function is arranged behind the particle filter 1.
- NNK NO x storage catalytic converter
- SCR catalytic converter function is arranged behind the particle filter 1.
Landscapes
- 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)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003123385 DE10323385B4 (de) | 2003-05-23 | 2003-05-23 | Abgasreinigungsanlage für eine Brennkraftmaschine |
DE10323385.7 | 2003-05-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004104388A1 true WO2004104388A1 (fr) | 2004-12-02 |
Family
ID=33461850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/005319 WO2004104388A1 (fr) | 2003-05-23 | 2004-05-18 | Installation d'epuration des gaz d'echappement pour moteur a combustion interne |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE10323385B4 (fr) |
WO (1) | WO2004104388A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITRE20050127A1 (it) | 2005-11-11 | 2007-05-12 | Ufi Filters Spa | Impianto per la depurazione dei gas di scarico emessi dai motori a combustione interna |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19806062A1 (de) * | 1998-02-13 | 1999-08-19 | Siemens Ag | Reduktionskatalysator und Verfahren zur Reinigung dieselmotorischen Abgases |
WO2001096717A1 (fr) * | 2000-06-16 | 2001-12-20 | Johnson Matthey Public Limited Company | Reacteur destine a traiter des gaz d'echappement |
WO2002081880A1 (fr) * | 2001-04-03 | 2002-10-17 | Ngk Insulators,Ltd. | Structure en nid d'abeilles et son ensemble |
US20030056499A1 (en) * | 2001-07-03 | 2003-03-27 | Klaus Binder | Exhaust-gas aftertreatment device with nitrogen oxide storage catalytic converter, and operating method therefor |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0590814B1 (fr) * | 1992-09-28 | 1996-12-18 | Ford Motor Company Limited | Système de contrÔle d'émission de particules et de gaz d'échappement |
DE19718727C2 (de) * | 1997-05-02 | 2001-01-04 | Degussa | Verfahren zur Behandlung des Abgases eines Dieselmotors zur Verminderung der Partikelemission |
DE19955324A1 (de) * | 1999-11-17 | 2001-05-23 | Volkswagen Ag | Vorrichtung und Verfahren zum Reduzieren von schädlichen Bestandteilen im Abgas einer Brennkraftmaschine, insbesondere einer Diesel-Brennkraftmaschine |
DE10010013A1 (de) * | 2000-03-02 | 2001-09-06 | Still Gmbh | Fahrzeug mit einer Brennkraftmaschine und mindestens einer elektrischen Maschine |
DE10118327A1 (de) * | 2001-04-12 | 2002-10-17 | Emitec Emissionstechnologie | Abgassystem |
-
2003
- 2003-05-23 DE DE2003123385 patent/DE10323385B4/de not_active Expired - Fee Related
-
2004
- 2004-05-18 WO PCT/EP2004/005319 patent/WO2004104388A1/fr active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19806062A1 (de) * | 1998-02-13 | 1999-08-19 | Siemens Ag | Reduktionskatalysator und Verfahren zur Reinigung dieselmotorischen Abgases |
WO2001096717A1 (fr) * | 2000-06-16 | 2001-12-20 | Johnson Matthey Public Limited Company | Reacteur destine a traiter des gaz d'echappement |
WO2002081880A1 (fr) * | 2001-04-03 | 2002-10-17 | Ngk Insulators,Ltd. | Structure en nid d'abeilles et son ensemble |
EP1375854A1 (fr) * | 2001-04-03 | 2004-01-02 | Ngk Insulators, Ltd. | Structure en nid d'abeilles et son ensemble |
US20030056499A1 (en) * | 2001-07-03 | 2003-03-27 | Klaus Binder | Exhaust-gas aftertreatment device with nitrogen oxide storage catalytic converter, and operating method therefor |
Also Published As
Publication number | Publication date |
---|---|
DE10323385B4 (de) | 2006-02-02 |
DE10323385A1 (de) | 2004-12-23 |
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