GB2485777A - Method and apparatus for operating a lean NOx trap - Google Patents
Method and apparatus for operating a lean NOx trap Download PDFInfo
- Publication number
- GB2485777A GB2485777A GB1019805.9A GB201019805A GB2485777A GB 2485777 A GB2485777 A GB 2485777A GB 201019805 A GB201019805 A GB 201019805A GB 2485777 A GB2485777 A GB 2485777A
- Authority
- GB
- United Kingdom
- Prior art keywords
- trap
- lean
- regeneration
- storage
- computer program
- 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- Withdrawn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
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000008929 regeneration Effects 0.000 claims abstract description 46
- 238000011069 regeneration method Methods 0.000 claims abstract description 46
- 238000002485 combustion reaction Methods 0.000 claims abstract description 12
- 230000003213 activating effect Effects 0.000 claims abstract description 11
- 230000018537 nitric oxide storage Effects 0.000 claims description 14
- 238000004590 computer program Methods 0.000 claims description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 239000005864 Sulphur Substances 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 61
- 239000003054 catalyst Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000000977 initiatory 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
- 241000663858 Corixidae Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000003463 adsorbent Substances 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
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000737 periodic 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
- 239000000523 sample Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 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
- F01N3/0821—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with 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
- F01N3/02—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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
-
- 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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/02—Catalytic activity of catalytic converters
-
- 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
Disclosed is a method and apparatus for operating a lean NOx trap 20 in an Internal Combustion Engine 10 equipped with an Electronic Control Unit, ECU 22 the method comprising: determining a value of a parameter indicative of a NOx loading level in the lean NOx trap 20 and starting a regeneration event of the lean NOx trap 20, if the determined value of the parameter fulfils a predetermined activating criterion related to this parameter. The method may use a rolling average of the NOx trap efficiency to determine when regeneration is required.
Description
METHOD FOR OPERATING A LEAN NO TRAP IN AN INTERM4L COMBUSTION ENGINE
TECHNICAL FIElD
The present disclosure relates to a method for operating a Lean NO Trap in an Internal Combustion Engine.
It is known that the exhaust gas after-treatment system of a Diesel engine can be equipped, among other devices, with a Lean NO Trap (Iflr).
A Lean NO< Trap (LNT) is used for trapping nitrogen oxides NO contained in the exhaust gas and is located in the exhaust line.
A Lean NO Trap (LNT) is a catalytic device containing catalysts, such as rhodium, and adsorbent, such as barium based elements, which provide active sites suitable for binding the nitrogen oxides (NO) 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) from the LNT.
To be able to manage LNF catalyst and consequently respect Euro 6 NO< or higher limits, it is necessary to be able to decide when it is appropriate to trigger a Lean NO Trap regeneration.
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 perform a Lean NO Trap regeneration process.
A further object is to provide the regeneration events only when they will not create harm to the Lean NO Trap or other components.
Another object is to provide the decisions to start Lean NO Trap regenerations without using complex devices and by taking advantage from the ccxuputational capabilities of the Electronic Control Unit (ECU) of the vehicle.
These objects are achieved by a nthod, by an engine, by a computer program and cariputer 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.
SThtRY P1n embodiment of the disclosure provides for a method for operating a Lean NO Trap in an Internal Combustion Engine equipped with an Electronic Control Unit, the method corrprising: -determining a value of a parameter indicative of a NO loading level in the Lean No trap, -starting a regeneration event of the Lean NO< Trap, if the determined value of the parameter fulfils a predetermined activating criterion related to this parameter.
Advantageously, this embodiment of the method allows to start 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 ND storage quantity in the Lean NO Trap and a Lean NO Trap efficiency.
Advantageously, the parameters chosen represent different ways to determine the actual status of the Lean NO Trap before initiating a regeneration event, allowing flexible adaptation to various Lean NO Trap states.
According to a further embodiment, the activating criterion is fulfilled if the actual value of the NO storage quantity exceeds a predetermined NO storage limit for the Lean NO Trap.
This embodiment allows to initiate a regeneration event when the Lean NO Trap has exceeded a preset maximum storage limit.
According to a further embodiment, the predetermined NO storage limit is equal to the higher value between an estimated NO storage capacity and a minimum predetermined NO, storage level of the Lean NC& Trap.
Advantageously, this embodiment allows to use as an activating criterion, a predetermined NO storage limit that is not lower than a safety minimum value, even in the case of an aged Lean NO Trap.
According to still another embodiment, the estimated NO storage capacity is a function of an average tenperature across the Lean NO Trap and of sulphur load in the Lean NO Trap.
This embodiment allows to take into account the most significant factors that influence the storage capacity of the Lean NO Trap.
According to still another embodiment, the activating criterion is fulfilled if the actual NO emission value from the tailpipe of the engine exceeds a predefined NO emission limit.
This embodiment allows to decide when to initiate a regeneration event depending on the effect of the aftertreatment on the emissions.
S According to a further embodiment, the activating criterion is fulfilled if a moving average Lean NO Trap efficiency between two successive regeneration events is below a predefined efficiency limit.
This embodiment allows to decide when to initiate a regeneration event depending on the efficiency of the Trap.
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 ccmbustion engine, comprising 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.
S
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.
IEF DESCRIPPICH OF DC DMWThGS The various embodiments will now be described, by way of example, with reference to the accorrpanying drawing, in which: Figure 1 is a schematic representation of an Internal Combustion Engine equipped with a Lean NQ Trap (LNr); and Figure 2 is a schematic representation of the main phases of an embodiment of the method disclosed.
DEThflED DESCRXFIICU OF THE DRAWThZ3S Preferred embodiments will now be described with reference to the enclosed drawing.
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 in a exhaust line 24 with a Lean NO Trap Catalyst 20 and a tailpipe 25.
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 NQ< and for oxides such as HC and CO -a regeneration phase in which short periods of rich fuel mixture (with lambda C 1) are used to clean up the Lean NO Trap 20 in order to recover its storage capacity.
To manage the transition between the loading and the regeneration phase, the ECU 22 evaluates the Lean NO Trap 20 status and decides when to start the regeneration in order to maintain the catalyst performance.
The ECU may also calculate if the regeneration has been corrpleted and if it was successful to recover the performance of the Lean NO Trap 20.
Therefore, after a Lean NO Trap 20 has been initialized, the method of the disclosure employs a smart logic to trigger 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 start of a Lean NO Trap 20 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 the started if the determined value of the parameter fulfils a predetermined activating criterion related to this parameter.
Specifically, a Lean NO Trap 20 regeneration event shall start when at least one of the following situations occurs.
In a first case, when the parameter indicative of a NO loading level is a N0> storage quantity in the Lean N0 Trap 20 and its value exceeds a predefined threshold.
In a second case, when a quantity of NQ emitted through a tailpipe 25 of the internal cortustion engine 10 exceeds a predefined NO emission threshold.
In third case, when a parameter indicative of the Lean NO Trap 20 storage efficiency is below a NO trapping efficiency threshold of the Lean NO Trap 20.
S
Additional criteria for initiating a Lean N0 Trap 20 regeneration event may also be used, as discussed further in the present
description.
For safety reasons, it is preferable to perform any starting of Lean N0 Trap 20 regeneration events only if no diagnostic flags are present and the Electronic Control Unit 22 does not require an interruption of the regeneration due to a faulty state of the engine 10 and the engine 10 is in a normal mode of operation.
Concerning the storage criterion, it must be noted that a Lean NO< Trap 20 regeneration will be performed if the actual NO quantity stored in the Lean PJO< Trap 20 is higher than a predefined threshold of maximum NO storage limit (block 57).
The maximum NQ< storage limit is predefined as a function of an average temperature across the Lean N0< Trap 20 and of sulphur load in the Trap 20.
The average temperature across the Lean NO Trap 20 may be determined as a function of the temperatures upstream and downstream of the Lean N0< Trap 20, as exemplified in block 54.
Specifically, the average temperature across the Lean NO Trap 20 can be determined by means of a model.
To determine the maximum NO storage limit, first an estimation of NO storage capacity of the Lean NO Trap 20 is performed in the following way: a first 51 and a second map 52 correlating the average teniperature across the Lean NO Trap 20 and the sulphur load in the Lean NO Trap 20 are defined, wherein the first map 51 represents a new Lean NO Trap 20 and the second nap 52 represents an aged Lean NO Trap 20. An interpolation between said new and aged maps 51,52 is calculated (in 63) using an ageing factor 53.
Furthermore, a minimum NO storage capacity 55 for the Lean NO Trap is also defined through a calibration parameter.
Using these values, the predetermined N0 storage limit is defined as equal to the higher value (in 64) between the maximum NQ capacity and the minimum N0 storage capacity 55. This value is then multiplied (in 58) by a safety factor 56.
This procedure allow to use, as an activating criterion, a predetermined N0 storage limit that is not lower than a safety minimum value, even in the case of an aged Lean NO Trap 20.
The safety factor 56 may be a function of the Lean NO Trap 20 average terrperature 54 and of the space velocity, namely the ratio between volumetric flow and the volume of the Lean NO>, Trap 20.
Finally the actual NO>, quantity stored in the Lean Nc& Trap 20 and the maximum NO>, storage limit are compared (block 57) and if the actual NO>, quantity stored in the Lean NO>, Trap 20 is higher than the maximum NO>, storage limit, the storage criterion to start a Lean NO>, Trap 20 regeneration is verified.
A Lean NO>, Trap 20 regeneration may also be started in dependence of a tailpipe 25 emission criterion.
The phase of determining a tailpipe 25 emission criterion ccmprises the comparison of an actual emission value from a tailpipe 25 of the engine 10 with a predefined emission limit (block 60).
A Lean NO>, Trap 20 regeneration may be started if the actual emission from the tailpipe 25 is higher than the predefined emission limit.
A Lean NO>, Trap 20 regeneration may also be started in dependence of a NO>, trapping efficiency criterion.
The phase of determining the NO>, trapping efficiency criterion corises the determination of a moving average Lean NO>, Trap 20 efficiency between two successive regeneration events.
Such value is reset every time a regeneration is concluded successfully.
Therefore a Lean NO Trap 20 regeneration is requested when the average efficiency is lower than a predefined efficiency limit (block 62).
The predefined efficiency limit is a function of a Lean NO Trap 20 ageing factor 53 and of sulphur load in the Lean NO Trap 20, as expressed in a map 61.
The efficiency of a Lean NO Trap 20 regeneration tray be calculated using data from a lambda probe.
Additional criteria for detennining the start of a Lean NO Trap 20 regeneration may depend on previous regeneration events.
Namely, a regeneration event is requested in case the previous regeneration event has been interrupted.
In all the above cases, it is preferable to perform a Lean NO Trap 20 regeneration event if no diagnostic flags are present and the Electronic Control Unit (22) does not require an interruption of the regeneration due an engine 10 faulty state and the engine 10 is in a normal mode of operation (block 59).
Furthermore, the average temperature of the Lean NO Trap 20, that can be determined by means of a model, must be lower than a calibratable temperature threshold in order to start a regeneration request (block 65).
The embodiments disclosed have the following benefits.
First, the method disclosed allows to decide the start of a Lean NO Trap 20 regeneration event on the basis of the actual catalyst status.
Also, fuel consumption optimization is achieved thanks to the regeneration event start decisions in function of the catalyst actual status.
While at least one exemplary embodiment has been presented in the foregoing summary and detailed description, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments 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.
REBEPfl NRS Engine Lean NO Trap 22 Electronic Control Unit 24 Exhaust line Engine tailpipe Data carrier Logic circuit 51 New Lean NO Trap map 52 Aged Lean NO Trap 53 Ageing factor 54 Determination of Lean NO Trap average terrDerature Minimum Lean NQ Trap storage capacity 56 Safety factor 57 Comparison of actual storage with maximum storage limit 58 Safety multiplier 59 Safety criteria Tailpipe emission comparison 61 Efficiency map 62 Efficiency comparison 63 Interpolation block 64 Higher value comparison Comparison of temperature with calibratable threshold aam
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), -starting a regeneration event of the Lean NO, Trap (20), if the determined value of the parameter fulfils a predetermined activating criterion related to this parameter.
2. Method according to claim 1, in which the paraireter indicative of a NO loading level is chosen from a N0 storage quantity in the Lean NO Trap (20) and a Lean N0 Trap (20) efficiency.
3. Method according to claim 2, in which the activating criterion is fulfilled if the actual value of the N0 stored in the Lean NO Trap (20) exceeds a predetermined NO storage limit.
4. Method according to claim 3, in which the predetermined NO storage limit is equal to the higher value (64) between an estimated N0 storage capacity and a minirmim predetermined N0 storage capacity (55) of the Lean NO Trap (20).
5. Method according to claim 4, in which the estimated NO storage capacity is a function of an average temperature across the Lean NO, Trap (20) and of sulphur load in the Lean N0 Trap (20).
6. Method according to claim 4, in which the estimated NO storage capacity is a function of a Lean NO Trap (20) ageing factor.
7. Method according to claim 2, in which the activating criterion is fulfilled if a moving average of a Lean I4O Trap (20) storage efficiency between two successive regeneration events is below a predefined efficiency limit.
8. Method according to claim 7, in which the predefined efficiency limit is a function of a Lean NO Trap (20) ageing factor and of sulphur load in the Lean MO Trap (20).
9. Internal combustion engine (10), in particular Diesel engine, the combustion engine (10) having associated a Lean NO 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 computer-code suitable for performing the method according to any of the claims 1-9.
U. Computer program product on which the computer program accorthng 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 11 stored 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 |
|---|---|---|---|
| GB1019805.9A GB2485777A (en) | 2010-11-23 | 2010-11-23 | Method and apparatus for operating a lean NOx trap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1019805.9A GB2485777A (en) | 2010-11-23 | 2010-11-23 | Method and apparatus for operating a lean NOx trap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201019805D0 GB201019805D0 (en) | 2011-01-05 |
| GB2485777A true GB2485777A (en) | 2012-05-30 |
Family
ID=43467138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1019805.9A Withdrawn GB2485777A (en) | 2010-11-23 | 2010-11-23 | Method and apparatus for operating a lean NOx trap |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2485777A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2535247A (en) * | 2015-02-11 | 2016-08-17 | Ford Global Tech Llc | A method of emissions regulation |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0915244A2 (en) * | 1997-11-10 | 1999-05-12 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Exhaust gas purifying apparatus of internal combustion engine |
| EP1041254A2 (en) * | 1999-03-29 | 2000-10-04 | Toyota Jidosha Kabushiki Kaisha | Emission control apparatus for internal combustion engine |
| EP1134401A2 (en) * | 2000-03-17 | 2001-09-19 | Ford Global Technologies, Inc. | Method for improved performance of a vehicle having an internal combustion engine |
| EP1134392A2 (en) * | 2000-03-17 | 2001-09-19 | Ford Global Technologies, Inc. | Method and apparatus for controlling the purge of an NOx trap in a lean-burn engine |
| US20020056271A1 (en) * | 2000-10-25 | 2002-05-16 | Masayuki Wakui | Electronic control unit for controlling air fuel ratio to reduce NOx occluded in NOx catalyst |
| EP1475521A1 (en) * | 2002-02-12 | 2004-11-10 | Isuzu Motors Limited | Exhaust gas decontamination system and method of exhaust gas decontamination |
| EP1503065A2 (en) * | 2003-07-30 | 2005-02-02 | Nissan Motor Co., Ltd. | Exhaust gas cleaning apparatus |
| US20050022514A1 (en) * | 2003-07-31 | 2005-02-03 | Nissan Motor Co., Ltd. | Combustion control apparatus and method for internal combustion engine |
| EP1767762A1 (en) * | 2004-06-25 | 2007-03-28 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification device for internal combustion engine |
| US20080190097A1 (en) * | 2007-02-13 | 2008-08-14 | Honda Motor Co., Ltd. | Exhaust emission control device and method for internal combustion engine, and engine control unit |
| EP2275660A1 (en) * | 2008-05-15 | 2011-01-19 | Toyota Jidosha Kabushiki Kaisha | Device and method for controlling vehicle |
-
2010
- 2010-11-23 GB GB1019805.9A patent/GB2485777A/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0915244A2 (en) * | 1997-11-10 | 1999-05-12 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Exhaust gas purifying apparatus of internal combustion engine |
| EP1041254A2 (en) * | 1999-03-29 | 2000-10-04 | Toyota Jidosha Kabushiki Kaisha | Emission control apparatus for internal combustion engine |
| EP1134401A2 (en) * | 2000-03-17 | 2001-09-19 | Ford Global Technologies, Inc. | Method for improved performance of a vehicle having an internal combustion engine |
| EP1134392A2 (en) * | 2000-03-17 | 2001-09-19 | Ford Global Technologies, Inc. | Method and apparatus for controlling the purge of an NOx trap in a lean-burn engine |
| US20020056271A1 (en) * | 2000-10-25 | 2002-05-16 | Masayuki Wakui | Electronic control unit for controlling air fuel ratio to reduce NOx occluded in NOx catalyst |
| EP1475521A1 (en) * | 2002-02-12 | 2004-11-10 | Isuzu Motors Limited | Exhaust gas decontamination system and method of exhaust gas decontamination |
| EP1503065A2 (en) * | 2003-07-30 | 2005-02-02 | Nissan Motor Co., Ltd. | Exhaust gas cleaning apparatus |
| US20050022514A1 (en) * | 2003-07-31 | 2005-02-03 | Nissan Motor Co., Ltd. | Combustion control apparatus and method for internal combustion engine |
| EP1767762A1 (en) * | 2004-06-25 | 2007-03-28 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification device for internal combustion engine |
| US20080190097A1 (en) * | 2007-02-13 | 2008-08-14 | Honda Motor Co., Ltd. | Exhaust emission control device and method for internal combustion engine, and engine control unit |
| EP2275660A1 (en) * | 2008-05-15 | 2011-01-19 | Toyota Jidosha Kabushiki Kaisha | Device and method for controlling vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2535247A (en) * | 2015-02-11 | 2016-08-17 | Ford Global Tech Llc | A method of emissions regulation |
| GB2535247B (en) * | 2015-02-11 | 2019-05-29 | Ford Global Tech Llc | A method of emissions regulation |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201019805D0 (en) | 2011-01-05 |
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