GB2484746A - Method of terminating a lean NOx trap regeneration event - Google Patents
Method of terminating a lean NOx trap regeneration event Download PDFInfo
- Publication number
- GB2484746A GB2484746A GB1017950.5A GB201017950A GB2484746A GB 2484746 A GB2484746 A GB 2484746A GB 201017950 A GB201017950 A GB 201017950A GB 2484746 A GB2484746 A GB 2484746A
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- GB
- United Kingdom
- Prior art keywords
- lean
- trap
- regeneration event
- regeneration
- event
- 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.)
- Withdrawn
Links
- 230000008929 regeneration Effects 0.000 title claims abstract description 66
- 238000011069 regeneration method Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000000523 sample Substances 0.000 claims abstract description 17
- 238000002485 combustion reaction Methods 0.000 claims abstract description 14
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000001301 oxygen Substances 0.000 claims abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 8
- 238000004590 computer program Methods 0.000 claims description 14
- 230000018537 nitric oxide storage Effects 0.000 claims description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 10
- 239000003054 catalyst Substances 0.000 description 9
- 239000000446 fuel Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- WRRSFOZOETZUPG-FFHNEAJVSA-N (4r,4ar,7s,7ar,12bs)-9-methoxy-3-methyl-2,4,4a,7,7a,13-hexahydro-1h-4,12-methanobenzofuro[3,2-e]isoquinoline-7-ol;hydrate Chemical compound O.C([C@H]1[C@H](N(CC[C@@]112)C)C3)=C[C@H](O)[C@@H]1OC1=C2C3=CC=C1OC WRRSFOZOETZUPG-FFHNEAJVSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
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
- F01N3/0814—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
- 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
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1402—Exhaust gas composition
-
- 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
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
Method for operating a lean NOx trap 20 in an Internal Combustion Engine 10 equipped with an Electronic Control Unit 22, where the method comprises determining a value of a parameter indicative of a NOx loading level in the lean NOx trap during a regeneration event and terminating the regeneration event of the lean NOx trap if the determined value of the parameter fulfils a predetermined ending criterion related to the parameter. The parameter may represent the NOx storage quantity in the lean NOx trap, oxygen concentrations measured by an upstream and downstream lambda probe or a period of time elapsed from the start of a regeneration event. Preferably the ending criterion is fulfilled if the downstream oxygen concentration is lower than the upstream oxygen concentration, if the determined value of the NOx storage quantity is lower than a predetermined value or if the time elapsed is longer than a predetermined value.
Description
METHOD FOR OPERATING A LEAN NOx TRAP IN AN INTERL CCMBUSTION ENGINE
TECHNICAL FIELD
The present disclosure relates to a method for operating a Lean NO, Trap in an Internal Combustion Engine.
BACKGIWI) It is known that the exhaust gas after-treatment systems of a Diesel engine can be provided, among other devices, with a Lean NO Trap (LNT).
A Lean NO Trap (LNT) is provided for trapping nitrogen oxides NO contained in the exhaust gas and is located in the exhaust line.
A LNT is a catalytic device containing catalysts, such as Rhodium, Pt and Pd, and adsorbents, such as barium based elements, which provide active sites suitable for binding the nitrogen oxides (NQ) contained in the exhaust gas, in order to trap them within the device itself.
Lean NO Traps (LNT) are subjected to periodic regeneration processes, whereby such regeneration processes are generally provided to release and reduce the trapped nitrogen oxides (NO,J fran the LNT.
The LNT are operated cyclically, for example by switching the engine from lean-bum operation to operation whereby an excess amount of fuel is available, referred also as rich operation or regeneration phase. During normal operation of the engine the NO are stored on a catalytic surface. When the engine is switched to rich operation, the NO stored on the adsorbent site react with the reductants in the exhaust gas and are desorbed and converted to nitrogen, thereby regenerating the adsorbent site of the catalyst.
However, to be able to manage LNT catalyst and consequently respect Euro 6 NO or higher limits, it is necessary to be able to operate the LINT catalyst perfonuing a series of regeneration events.
Due to the different conditions of operation of the engine, it is not possible to have a single criterion to end a regeneration event that may be always appropriate.
An object of an embodiment of the invention disclosed is therefore to define a procedure able to detect, during normal driving, when it is necessary to end a Lean NOX Trap regeneration process in different operation conditions of the engine.
A further object is to end the regeneration events only when they will not create harm to the Lean NO Trap or to other components.
Another object is to provide the decisions to end Lean NO, Trap regenerations without using complex devices and by taking advantage from the computational capabilities of the Electronic Control Unit (ECU) of the vehicle.
These objects are achieved by a riethod, by an engine, by a computer program and computer program product, and by an electromagnetic signal having the features recited in the independent claims.
The dependent claims delineate preferred and/or especially advantageous aspects.
SU4'9RY An ertodiment of the disclosure provides for a method for operating a Lean NQ Trap in an Internal Combustion Engine equipped with an Electronic Control Unit, the method comprising: -determining a value of a parameter indicative of a NO loading level in the Lean NO trap during a regeneration event, -terminating the regeneration event of the Lean NO Trap, if the determined value of the parameter fulfils a predetermined ending criterion related to this parameter.
Advantageously this embodiment of the method allows to end a Lean NO Trap regeneration event according to the actual status of the Trap.
According to a further embodiment, the parameter indicative of a NO loading level is chosen from a NQ storage quantity in the Lean NO, Trap, oxygen concentrations (lth, 1) measured, respectively, by a downstream lambda probe and an upstream lambda probe, in an exhaust line of the Internal Combustion Engine and a time period elapsed from the start of one regeneration event.
An advantage of this embodiment is that the parameters chosen represent different ways to determine the actual status of the Lean NO Trap before initiating and during a regeneration event, allowing flexible adaptation to various Lean NO Trap states.
According to still another embodiment, the ending criterion is fulfilled if the value l<j, measured by the downstream lambda probe is lower than the l value measured by the upstream lambda probe for a predetermined minimum time.
This ertodirrent, advantageously, provides an alternative criterion to end a regeneration event as soon as possible to have a successful regeneration.
According to a further embodiment, the ending criterion is fulfilled if the determined value of the NO storage quantity in the Lean NC)X Trap is lower than a predetennined NQ storage level.
Advantageously, this criterion allows to end a regeneration event as soon as possible to have a successful regeneration.
According to another embodiment, the ending criterion is fulfilled if the time elapsed during a regeneration event is higher than a predetermined maximum time of rich operation.
Advantageously, this embodiment avoids too long regeneration events that may negatively impact on fuel consumption.
According to still another embodiment, the ending criterion is fulfilled if the time elapsed during a regeneration event is longer than a period of time estimated by a theoretical time of rich operation calculated at the beginning of the regeneration event.
Advantageously, this embodiment provides an alternative way to avoid too long regeneration events that may negatively impact on fuel consumption.
Still another embodiment provides for the fact that for each event requested it is possible to decide which are the criteria used to end a regeneration event.
The advantage of this embodiment is that it allows to optimize the average efficiency of the catalyst and the fuel consumption.
Still another embodiment provides for the fact that the actual ending criterion used for ending a specific regeneration event can be chosen, after a calibratable number of events, as a function of the operating parameters of the Engine and of the Lean NO Trap.
The advantage of this embodiment is that it allows a flexible approach to the choice of regeneration ending criterions depending on the circumstances.
The method according to one of its aspects can be carried out with the help of a computer program comprising a program-code for carrying out all the steps of the method described above, and in the form of computer program product comprising the computer program.
The computer program product can be embodied as a control apparatus for an internal combustion engine, cczrtprising an Electronic Control Unit (ECU), a data carrier associated to the ECU, and the computer program stored in a data carrier, so that the control apparatus defines the embodiments described in the same way as the method. In this case, when the control apparatus executes the computer program all the steps of the method described above are carried out.
The method according to a further aspect can be also embodied as an electromagnetic signal, said signal being modulated to carry a sequence of data bits which represents a computer program to carry out all steps of the method.
A still further aspect of the disclosure provides an internal combustion engine specially arranged for carrying out the method claimed.
BRIEF DESCRIPTION OF THE DRAWINGS
The various embodiments will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a schematic representation of an Internal Combustion Engine equipped with a Lean NO Trap (LNT); Figure 2 is a schematic representation of the main phases of an embodiment of the method disclosed; and Figure 3 is a schematic representation of conditions that define an unsuccessful regeneration of a Lean NO Trap.
DEThILED DESCRIPTION OF THE DRAWINGS
Preferred embodiments will now be described with reference to the enclosed drawings.
Figure 1 shows an internal combustion engine 10 managed by an engine Electronic Control Unit (ECU) 22 equipped with a data carrier 30, the internal combustion engine 10 being equipped with an exhaust line 24 with a Lean NO Trap Catalyst 20.
In the exhaust line 24, an upstream lambda probe 25 and a downstream lambda probe 26 are associated to the Lean NO, Trap 20.
The Lean NO Trap 20 may be operated according to the following phases: -a loading phase, in which during normal mode of operation of the Lean NO Trap 20, it acts as trap for the NO and for oxides such as HC and CC, -a regeneration phase in which short periods of rich fuel mixture (with lambda < 1) are used to reduce to N2 the NO, in the Lean N0, Trap 20 in order to recover its storage capacity.
To manage the end of a regeneration phase of the Lean NO Trap, the ECU 22 evaluates the Lean Nc& Trap 20 status and a certain number of other parameters, as explained in detail below, and decides when to end the regeneration in order to maintain the catalyst performance.
The ECU may also calculate if the regeneration has been ccrnpleted and if it was successful to restore the performance of the Lean NO Trap 20.
The method herein disclosed employs a smart logic to decide when to end Lean NO Trap regeneration events, depending on the actual status of the Lean NO Trap 20, as exemplified in the logical circuit 50 of Figure 2.
In general, the method disclosed determines the end of a Lean NO Trap regeneration by determining a value of a parameter indicative of a NO, loading level in the Lean No trap 20.
A regeneration event of the Lean NO Trap 20 is terminated if the determined value of the parameter fulfils a predetermined ending criterion related to this parameter.
Specifically, a Lean NQ Trap 20 regeneration event shall be terminated when at least one of the following situations occurs during a regeneration event.
In a first case (EndEyLaraSens), the ending criterion is fulfilled if the oxygen concentration value 1 measured by the downstream larrbda probe 26 is lower than the oxygen concentration value measured by the upstream larftxda probe 25 for a predetermined minimum time and a rich state is detected (block 51).
In a second case (EndByMassBal), the ending criterion is fulfilled if the actual mass value of the NO stored in the Lean NO Trap 20 is lower than a predetermined NO storage level and a rich state is detected (block 52).
In a third case (EndByMaxTim), the ending criterion is fulfilled if the time elapsed during a regeneration event is longer than a predetermined maximum time of rich operation and a rich state is detected (block 53).
In a further case (EndByTheoRich), the ending criterion is fulfilled if the time elapsed during a regeneration event is longer than a period of time estimated by a theoretical time of rich operation calculated at the beginning of the regeneration event and a rich state is detected (block 54).
Namely, in this case, a theoretical calculation is performed to estimate the time needed for a regeneration on the basis of the total quantity of NO stored to be desorbed and converted and the external conditions measured in terms of oxygen concentration.
A block 56, indicated as DeNO End Manager, collects and processes the regeneration ending criteria set above and is able to detect if the Lean NO Trap 20 is in the initialization phase or in a normal state (Free DeNO).
For each event requested the DeNO End Manager can decide which are the criteria used to end a regeneration event during the initialization phase and during the Free DeNO state.
For example if the Lean NO Trap 20 is subjected to an initialization procedure, ending criteria may be quite conservative in order to be sure to reset the Lean NO Trap 20, while if the Lean NO Trap 20 is in a normal state (Free DeNQJ, ending criteria used may be less conservative, for example alternating long and short regeneration events.
The DeNOX End Manager is also provided with an event counter which, when the Lean NQ Trap 20 is in the condition of performing a regeneration event, counts the number of successful events. During initialization phase once a calibratable threshold number of successful events is reached, this is phase can be considered concluded. During the normal state (Free DeNO) once a calibratable threshold number of events is reached, a choice can be made of which criteria be used to end the following regeneration events and the counter will be reset.
For example, after three events are ended using the criterion of (EndSyMaxTim), namely using the ending criterion of time elapsed during a regeneration event longer than a predetermined maximum time of rich operation, the subsequent regeneration event may be end by another criterion such (EndByLamsens), namely if the value measured by the downstream lambda probe 26 is lower than the l value measured by the upstream lambda probe 25 for a predetermined minimum time.
In any case, the regeneration event must be longer than a predefined minimum amount of time (block 55) in order that a termination request be issued.
A regeneration event ended successfully means that all the NO, present in the catalyst have been converted, so that the event as been long as desired by the regeneration strategy.
By contrast, a regeneration event ended unsuccessfully, as depicted schematically in figure 3, means that the event requested has not been finished or even started. So this means that there will be some residual NO in the catalyst.
Some conditions are needed to abort the regeneration and will give rise to a state defined (EndByBreakDemand) in fig. 3, whereby such state surtmarizes all conditions which can do any harm to the hardware, defines the engine operation range within regeneration mode that require an interruption of regeneration, such as overrun, etc. While at least one exemplary embodiment has been presented in the foregoing surrnary and detailed description, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary ernbodinient or exemplary emkodiments are only examples, and are not intended to limit the scope, applicability, or configuration in any way. Rather, the foregoing sumary and detailed description will provide those skilled in the art with a convenient road map for implementing at least one exemplary embodiment, it being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope as set forth in the appended claims and their legal equivalents.
BEFEREIC U4BERS Engine Lean NO Trap 22 Electronic Control Unit 24 Exhaust line Upstream lambda probe 26 Downstream lambda probe Data carrier 50 Logic circuit 51 l, l criterion comparison 52 NO mass criterion ccznparison 53 Predetermined maximum time comparison 54 Theoretical time comparison 55 Minimum regeneration period comparison 56 DeNO End Manager
Claims (13)
1. Method for operating a Lean NO Trap (20) in an Internal Combustion Engine (10) equipped with an Electronic Control Unit (22), the method comprising: -determining a value of a parameter indicative of a NO loading level in the Lean NO,( trap (20) during a regeneration event, -terminating the regeneration event of the Lean NO Trap (20), if the determined value of the parameter fulfils a predetermined ending criterion related to this parameter.
2. Method according to claim 1, in which the parameter indicative of a NO loading level is chosen from a NO storage quantity in the Lean NO, Trap (20), oxygen concentrations (l, l,) measured, respectively, by a downstream lambda probe (26) and an upstream lambda probe (25), in an exhaust line (24) of the Internal Combustion Engine (10) and a time period elapsed from the start of one regeneration event.
3. Method according to claim 2, in which the ending criterion is fulfilled if the value Lj measured by the downstream lambda probe (26) is lower than the l, value measured by the upstream lambda probe (25) for a predetermined minimum time
4. Method according to claim 2, in which the ending criterion is fulfilled if the determined value of the NO storage quantity in the Lean NO Trap (20) is lower than a predetermined NO storage level.
5. Method according to claim 2, in which the ending criterion is fulfilled if the time elapsed during a regeneration event is higher than a predetermined maxirraim time of rich operation.
6. Method according to claim 2, in which the ending criterion is fulfilled if the time elapsed during a regeneration event is longer than a period of time estimated by a theoretical time of rich operation calculated at the beginning of the regeneration event.
7. Method according to claim 1, in which for each event requested it is possible to decide which are the criteria used to end a regeneration event.
8. Method according to claim 1, in which the actual ending criterion used for ending a specific regeneration event can be chosen, after a calibratable number of events, as a function of the operating parameters of the engine (10) and of the Lean NO Trap (20).
9. Internal combustion engine (10), in particular Diesel engine, the combustion engine (10) having associated a Lean NQ Trap (20), the engine (10) comprising an Electronic Control Unit (22) configured for carrying out the method according to any of the preceding claims.
10. A computer program comprising a corrputer-code suitable for performing the method according to any of the claims 1-8.
11. Computer program product on which the computer program according to claim 10 is stored.
12. Control apparatus for an internal combustion engine (10), comprising an Electronic Control Unit (22), a data carrier (30) associated to the Electronic Control Unit (22) and a computer program according to claim 10 stcred in the data carrier (30).
13. An electromagnetic signal modulated as a carrier for a sequence of data bits representing the computer program according to claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1017950.5A GB2484746A (en) | 2010-10-18 | 2010-10-18 | Method of terminating a lean NOx trap regeneration event |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1017950.5A GB2484746A (en) | 2010-10-18 | 2010-10-18 | Method of terminating a lean NOx trap regeneration event |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201017950D0 GB201017950D0 (en) | 2010-12-01 |
| GB2484746A true GB2484746A (en) | 2012-04-25 |
Family
ID=43334310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1017950.5A Withdrawn GB2484746A (en) | 2010-10-18 | 2010-10-18 | Method of terminating a lean NOx trap regeneration event |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2484746A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3760845A1 (en) * | 2019-07-04 | 2021-01-06 | Renault S.A.S. | Method for controlling a motor vehicle provided with a nitrogen oxide trap for deoxidation of said trap |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0867604A1 (en) * | 1997-03-27 | 1998-09-30 | Ford Global Technologies, Inc. | Method and apparatus for maintaining catalyst efficiency of a nox trap |
| EP0997617A1 (en) * | 1998-10-28 | 2000-05-03 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Regeneration method of a nitrogen oxides trap in the exhaust system of a combustion engine and device for carrying out this method |
| US20020124551A1 (en) * | 2000-12-22 | 2002-09-12 | Thomas Birkhofer | Method for identifying the state of an NOx storage catalyst |
| US20040006976A1 (en) * | 2002-07-11 | 2004-01-15 | Stroia Bradlee J. | Adsorber aftertreatment system having downstream soot filter |
| FR2848247A1 (en) * | 2002-12-04 | 2004-06-11 | Peugeot Citroen Automobiles Sa | Control system for the operation of a NOx purge of a NOx trap integrated into an exhaust pipe of a diesel engine in a vehicle |
| US20060053772A1 (en) * | 2004-09-16 | 2006-03-16 | Danan Dou | NOx adsorber diagnostics and automotive exhaust control system utilizing the same |
| US20070095053A1 (en) * | 2005-10-31 | 2007-05-03 | Arvin Technologies, Inc. | Method and apparatus for emissions trap regeneration |
-
2010
- 2010-10-18 GB GB1017950.5A patent/GB2484746A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0867604A1 (en) * | 1997-03-27 | 1998-09-30 | Ford Global Technologies, Inc. | Method and apparatus for maintaining catalyst efficiency of a nox trap |
| EP0997617A1 (en) * | 1998-10-28 | 2000-05-03 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Regeneration method of a nitrogen oxides trap in the exhaust system of a combustion engine and device for carrying out this method |
| US20020124551A1 (en) * | 2000-12-22 | 2002-09-12 | Thomas Birkhofer | Method for identifying the state of an NOx storage catalyst |
| US20040006976A1 (en) * | 2002-07-11 | 2004-01-15 | Stroia Bradlee J. | Adsorber aftertreatment system having downstream soot filter |
| FR2848247A1 (en) * | 2002-12-04 | 2004-06-11 | Peugeot Citroen Automobiles Sa | Control system for the operation of a NOx purge of a NOx trap integrated into an exhaust pipe of a diesel engine in a vehicle |
| US20060053772A1 (en) * | 2004-09-16 | 2006-03-16 | Danan Dou | NOx adsorber diagnostics and automotive exhaust control system utilizing the same |
| US20070095053A1 (en) * | 2005-10-31 | 2007-05-03 | Arvin Technologies, Inc. | Method and apparatus for emissions trap regeneration |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3760845A1 (en) * | 2019-07-04 | 2021-01-06 | Renault S.A.S. | Method for controlling a motor vehicle provided with a nitrogen oxide trap for deoxidation of said trap |
| FR3098249A1 (en) * | 2019-07-04 | 2021-01-08 | Renault S.A.S | Method for controlling a motor vehicle fitted with a nitrogen oxide trap for the deoxidation of said trap |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201017950D0 (en) | 2010-12-01 |
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