WO2004038202A1 - Systeme de regeneration d'un piege a nox pour moteur diesel - Google Patents
Systeme de regeneration d'un piege a nox pour moteur diesel Download PDFInfo
- Publication number
- WO2004038202A1 WO2004038202A1 PCT/FR2003/003121 FR0303121W WO2004038202A1 WO 2004038202 A1 WO2004038202 A1 WO 2004038202A1 FR 0303121 W FR0303121 W FR 0303121W WO 2004038202 A1 WO2004038202 A1 WO 2004038202A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- engine
- regeneration
- nox
- trap
- approximately
- 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
- 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
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
- F02D41/403—Multiple injections with pilot injections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0055—Special engine operating conditions, e.g. for regeneration of 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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
- F02D41/405—Multiple injections with post injections
-
- 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 present invention relates to a system for reducing polluting emissions linked to the operation of a diesel engine of a motor vehicle and relates more particularly to a system for assisting the regeneration of a storage / destocking Nox trap, integrated in a exhaust line of such an engine.
- this trap When this trap is saturated, it is proposed to trigger a transient destocking phase by momentarily switching the engine from this standard lean mixture operating mode to a rich mixture regeneration operating mode to produce reducers, such as for example HC and CO , which reduces the NOx which is then desorbed from the trap, as in a traditional catalyst.
- reducers such as for example HC and CO
- the subject of the invention is a system for assisting the regeneration of a NOx trap for storage / release, integrated in an exhaust line of a diesel engine of a motor vehicle, characterized in that it comprises means for admitting gas into the engine and means for injecting fuel into the cylinders thereof in the form of at least pilot and main injections and means for controlling these means for admitting gas and / or fuel injection to periodically switch the engine from a standard lean mixture operating mode, NOx storage in the trap, to a rich mixture regeneration operating mode, to pilot injection and at least two main injections, destocking the NOx of the trap and regenerating it.
- the control means are adapted to control the gas intake means in order to reduce the quantity of gas admitted into the engine when the latter is in its regeneration operating mode;
- control means are adapted to control the gas intake and / or fuel injection means according to these standard operating and regeneration modes for engine loads greater than a predetermined threshold value;
- the predetermined load threshold value is defined by an effective average pressure of approximately 3 bars;
- the pilot injection is triggered in a range between about 50 ° crankshaft and 5 ° crankshaft, before the top dead center of the cylinder concerned and in that the main injections are triggered in a range between about 20 ° crankshaft before the top point and 120 ° crankshaft after top dead center;
- control means are adapted to control the gas intake and / or fuel injection means in order to run the engine in lean mixture for approximately 60 seconds and in rich mixture for approximately 2 seconds;
- - Figs.1 and 2 illustrate the phases of storage and release of NOx in a trap used in the constitution of a system according to the invention
- - Fig.3 illustrates the operation of fuel injection means implemented in an assistance system according to the invention
- - Fig.4 shows a block diagram illustrating the structure of a system according to the invention.
- the invention relates to a system for assisting the regeneration of a NOx trap for storage / retrieval integrated into an exhaust line of a diesel engine of a motor vehicle.
- the NOx trap absorbs NOx during standard operation of the lean mixture engine, while in a rich mixture regeneration operating mode, these NOx are destocked and treated by the production of reducers such as HC and CO, which reduces the NOx which is then desorbed from the trap as in a traditional catalyst.
- reducers such as HC and CO
- This operation is longer than the purge, which lasts only a few seconds, and is therefore even more difficult to manage.
- the present invention proposes to improve the characteristics of combustion in stability and in noise, at points with predetermined engine loads, by applying an injection strategy to a pilot injection and at least two main injections, such as this is illustrated in FIG. 3.
- the application of these two main injections also makes it possible to maintain the temperature of the exhaust gases within limits admissible by the architecture of the engine (cylinder head, valves, manifold, etc.).
- a recirculation of the burnt gases may then be necessary or not to comply with the criteria for regenerating the NOx trap.
- predetermined loads such as for example for an effective average pressure (PME) also known in the state of the art under the English name "Brake mean effective pressure", greater than about 3 bars
- PME effective average pressure
- the two injection strategy main therefore makes it possible to meet the criteria for regenerating the NOx trap, because it makes it possible to significantly reduce the combustion instabilities thanks to the phasing of the two main injections, to reduce the noise also thanks to this phasing of the two injections, to maintain the exhaust gas temperature to allowable values and finally generate an engine map for the regeneration of the NOx trap based on a unique strategy.
- this strategy can be applied to points with predetermined engine operating loads, the EGR level then being appropriately controlled.
- This pilot injection can be triggered in a range between about 50 ° crankshaft and 5 ° crankshaft before the top dead center of the cylinder concerned, and the main injections can be triggered in a range between about 20 ° crankshaft before top dead center and 120 ° after top dead center.
- a diesel engine of a motor vehicle designated by the general reference 4
- the outlet of which is connected to an exhaust line 5 in which a NOx trap 6 is integrated.
- This engine is also associated with air intake means designated by the general reference 7 comprising means 8 for adjusting the quantity of air admitted.
- This engine can also be associated with means for recirculating exhaust gas at the inlet thereof, designated by the general reference 9, associated with means for controlling the circulation of gases designated by the general reference 10.
- the adjustment means 8 and control means 10 can conventionally comprise controllable valves.
- the engine is also associated with means 11 for injecting fuel into the cylinders thereof, in the form of pilot and main injections, as has been indicated, having any suitable structure. .
- control means designated by the general reference 12 comprising any appropriate computer. , receiving for example as input, engine rotation speed and pressure information from the injection means, respectively from corresponding data acquisition means 13 and 14.
- the standard operating modes with lean mixture for storing NOx in the trap, and for operating with regeneration with rich mixture, destocking of NOx from the trap and therefore for regenerating the latter can be switched periodically, by the means control 12, the motor 4 operating for example in lean mixture for about 60 seconds, and in rich mixture for about 2 seconds.
- the control means 12 then act on the air intake means 7 in the engine 4 and the fuel injection means 11 in the cylinders thereof, for periodically switching the engine from the standard operating mode lean mix in the rich mix regeneration mode of operation.
- control means 12 can indeed be adapted to control the gas intake means in order to reduce the quantity of gas admitted into the engine when the latter is in its regeneration operating mode and for controlling the injection means in the manner indicated above.
- control means can also be adapted to regulate the operation of the exhaust gas recirculation means 9 during the operation of the rich mixture engine.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03778426A EP1554478A1 (fr) | 2002-10-23 | 2003-10-21 | Systeme de regeneration d'un piege a nox pour moteur diesel |
AU2003285425A AU2003285425A1 (en) | 2002-10-23 | 2003-10-21 | Nox trap regeneration system for a diesel engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR02/13254 | 2002-10-23 | ||
FR0213254A FR2846370B1 (fr) | 2002-10-23 | 2002-10-23 | Systeme d'aide a la regeneration d'un piege a nox a stockage/destockage pour moteur diesel |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004038202A1 true WO2004038202A1 (fr) | 2004-05-06 |
Family
ID=32088217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2003/003121 WO2004038202A1 (fr) | 2002-10-23 | 2003-10-21 | Systeme de regeneration d'un piege a nox pour moteur diesel |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1554478A1 (fr) |
AU (1) | AU2003285425A1 (fr) |
FR (1) | FR2846370B1 (fr) |
WO (1) | WO2004038202A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2950111A1 (fr) * | 2009-09-15 | 2011-03-18 | Renault Sa | Procede de commande d'un moteur diesel suralimente a recirculation de gaz d'echappement a basse pression |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2880070B1 (fr) * | 2004-12-29 | 2007-03-16 | Renault Sas | Procede de gestion de l'injection de carburant dans un moteur diesel equipe d'un piege a oxyde d'azote |
FR2883042B1 (fr) * | 2005-03-11 | 2007-06-01 | Peugeot Citroen Automobiles Sa | Systeme de controle du basculement du fonctionnement d'un moteur de vehicule automobile entre des modes riche et pauvre |
FR2883041B1 (fr) * | 2005-03-11 | 2007-06-01 | Peugeot Citroen Automobiles Sa | Systeme de controle du basculement du fonctionnement d'un moteur de vehicule automobile entre des modes pauvre et riche |
FR2946390B1 (fr) | 2009-06-04 | 2014-09-19 | Peugeot Citroen Automobiles Sa | Moteur a combustion interne et procede de fonctionnement associe a un tel moteur |
FR2983531B1 (fr) * | 2011-12-01 | 2015-03-06 | Renault Sa | Alimentation en mode riche d'un moteur a combustion interne a double pre-injection |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19639172A1 (de) * | 1996-09-24 | 1998-04-02 | Siemens Ag | Kraftstoff-Direkteinspritzverfahren für eine Dieselbrennkraftmaschine |
US5775099A (en) * | 1994-04-12 | 1998-07-07 | Toyota Jidosha Kabushiki Kaisha | Method of purifying the exhaust of an internal combustion engine |
US6116208A (en) * | 1998-09-29 | 2000-09-12 | Mazda Motor Corporation | Control system for a direct injection-spark ignition engine |
EP1035315A2 (fr) * | 1999-03-10 | 2000-09-13 | Mazda Motor Corporation | Système de commande d'injection de carburant pour moteur à combustion interne |
EP1077321A2 (fr) * | 1999-08-18 | 2001-02-21 | Mazda Motor Corporation | Système de contrôle d'injection de carburant pour moteur diesel |
EP1087119A1 (fr) * | 1999-04-06 | 2001-03-28 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Dispositif anti-pollution pour moteurs thermiques |
-
2002
- 2002-10-23 FR FR0213254A patent/FR2846370B1/fr not_active Expired - Fee Related
-
2003
- 2003-10-21 AU AU2003285425A patent/AU2003285425A1/en not_active Abandoned
- 2003-10-21 EP EP03778426A patent/EP1554478A1/fr not_active Ceased
- 2003-10-21 WO PCT/FR2003/003121 patent/WO2004038202A1/fr not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5775099A (en) * | 1994-04-12 | 1998-07-07 | Toyota Jidosha Kabushiki Kaisha | Method of purifying the exhaust of an internal combustion engine |
DE19639172A1 (de) * | 1996-09-24 | 1998-04-02 | Siemens Ag | Kraftstoff-Direkteinspritzverfahren für eine Dieselbrennkraftmaschine |
US6116208A (en) * | 1998-09-29 | 2000-09-12 | Mazda Motor Corporation | Control system for a direct injection-spark ignition engine |
EP1035315A2 (fr) * | 1999-03-10 | 2000-09-13 | Mazda Motor Corporation | Système de commande d'injection de carburant pour moteur à combustion interne |
EP1087119A1 (fr) * | 1999-04-06 | 2001-03-28 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Dispositif anti-pollution pour moteurs thermiques |
EP1077321A2 (fr) * | 1999-08-18 | 2001-02-21 | Mazda Motor Corporation | Système de contrôle d'injection de carburant pour moteur diesel |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2950111A1 (fr) * | 2009-09-15 | 2011-03-18 | Renault Sa | Procede de commande d'un moteur diesel suralimente a recirculation de gaz d'echappement a basse pression |
EP2299094A1 (fr) * | 2009-09-15 | 2011-03-23 | Renault S.A.S. | Procédé de commande d'un moteur diesel suralimenté à recirculation de gaz d'échappement à basse pression |
Also Published As
Publication number | Publication date |
---|---|
AU2003285425A1 (en) | 2004-05-13 |
EP1554478A1 (fr) | 2005-07-20 |
FR2846370A1 (fr) | 2004-04-30 |
FR2846370B1 (fr) | 2006-11-24 |
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