EP1252419A1 - Method and device for control of desulphurisation of a nox storage catalyst arranged in an exhaust system of an internal combustion engine - Google Patents
Method and device for control of desulphurisation of a nox storage catalyst arranged in an exhaust system of an internal combustion engineInfo
- Publication number
- EP1252419A1 EP1252419A1 EP01902302A EP01902302A EP1252419A1 EP 1252419 A1 EP1252419 A1 EP 1252419A1 EP 01902302 A EP01902302 A EP 01902302A EP 01902302 A EP01902302 A EP 01902302A EP 1252419 A1 EP1252419 A1 EP 1252419A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- desulfurization
- catalytic converter
- activity
- storage catalytic
- internal combustion
- 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.)
- Granted
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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
- F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
- F02D41/028—Desulfurisation of NOx traps or adsorbent
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
- F02D41/1463—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases downstream of exhaust gas treatment apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/04—Sulfur or sulfur oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0811—NOx storage efficiency
Definitions
- the invention relates to a method and a device for controlling a desulfurization of a NO x storage catalytic converter arranged in an exhaust gas duct of an internal combustion engine with the features mentioned in independent claims 1 and 13.
- aftertreat exhaust gases from internal combustion engines which are operated at least temporarily in a lean operating mode, with the aid of NO x storage catalytic converters.
- the NO x storage catalyst stores nitrogen oxides NO x , which in this phase are present in excess in the exhaust gas compared to reducing exhaust gas components, such as carbon monoxide or unburned hydrocarbons and therefore cannot be fully converted, in the form of nitrate.
- the storage catalytic converter is subjected to NO x regeneration at regular intervals or if the NO x storage capacity decreases, for which purpose the storage catalytic converter is charged with a rich exhaust gas atmosphere and a minimum catalytic converter temperature is set.
- the invention is based on the object of proposing a method for controlling desulfurization of a NO x storage catalytic converter, with the aid of which irreversible damage to the NO x storage catalytic converter can be identified and tracked.
- this object is achieved by a method and a device for controlling desulfurization of a NO x storage catalytic converter with the features mentioned in the independent claims.
- a NO x of the NO x -Speichermeditician - determined from a storage catalyst downstream of the NO x storage catalytic converter and the measured NO x concentration falls below a predetermined threshold value for the NO x activity of the NO x -Speicherkataiysators desulfurization with predeterminable Desulfurization parameters initiated.
- irreversible damage to the NO x storage catalytic converter is tracked on the basis of a desulfurization success and hard desulfurization is initiated if a predetermined damage limit value is exceeded, at least one desulfurization parameter being selected in accordance with a higher desulfurization efficiency, and further operation of the internal combustion engine from the level after hard desulfurization recovered NO x activity is made dependent. Carrying out the hard desulfurization ensures a quantitative sulfur output, even if previous ones
- Standard desulphurization should have been incomplete.
- the NO x storage activity recovered after the hard desulfurization can be directly correlated with an existing irreversible damage to the NO x storage catalytic converter. Consequently, permanent damage to the NO x storage catalytic converter which can no longer be tolerated can be recognized.
- the threshold value the lower value of which triggers a desulfurization
- the threshold value is reset after each desulfurization in such a way that it is proportional to an NO x starting activity of the NO x after the desulfurization has ended.
- Storage catalytic converter is.
- the damage limit value represents a minimum limit that cannot be undercut for ⁇ d Fe ⁇ O ⁇ storage efficiency td ar, the threshold value being greater than the damage limit value.
- the threshold value, the lower value of which triggers desulfurization is not varied.
- a desulfurization frequency increases with increasing irreversible damage to the catalyst, so that a predetermined maximum desulfurization frequency serves as the damage limit value.
- the damage limit value is specified as a lower limit of an initial NO x activity recovered after desulfurization.
- Desulfurization in particular hard desulfurization, is associated with higher fuel consumption and may influence the operating behavior of a vehicle. The initiation of desulfurization is therefore not desirable in every operating situation.
- An advantageous embodiment of the method therefore provides that, if the damage limit value is exceeded, lean operation of the internal combustion engine is first prohibited and hard desulfurization is only initiated when suitable, predetermined boundary conditions exist. This can be, for example, a minimum temperature of the NO x storage catalytic converter and / or a minimum vehicle speed that is maintained over a minimum period.
- the method according to the present invention provides that the further operation of the internal combustion engine after hard desulfurization is dependent on the desulfurization success, that is to say on the level of an initial NO x activity recovered after the desulfurization.
- a preferred embodiment provides that if after the end of hard desulfurization a recovered NO x starting activity corresponds almost completely or at least to a predetermined extent to that of a sulfur-free, NO x -free and undamaged NO x storage catalytic converter, lean operation of the internal combustion engine continues is allowed. In this case, it can be assumed that the loss of NO x storage activity observed before the hard desulfurization is due to sulfur storage and thus to incomplete, previous desulfurization and not to irreversible damage to the NO x storage catalyst. After a successful hard desulfurization measure, it is therefore further preferred that Adapt desulfurization parameters so adaptively that subsequent ones
- the device comprises means, for example a control unit, in which a procedure for controlling the process steps of the desulfurization of a NO x storage catalytic converter is stored in digital form.
- a control unit can advantageously be integrated in a mostly existing engine control unit.
- Figure 1 is a schematic diagram with an exhaust gas cleaning system
- FIG. 2 shows a time course of a NO x storage activity of a NO x .
- FIG. 3 shows a time course of a NO x storage activity of a NO x .
- FIG. 4 shows a flow chart of the method steps according to the invention in accordance with the exemplary embodiment shown in FIG. 2.
- FIG. 1 schematically shows an internal combustion engine 10 with a downstream exhaust line 12.
- a pre-catalytic converter 16 and an NO x storage catalytic converter 18 are arranged in an exhaust gas duct 14 of the exhaust line 12.
- the exhaust duct 14 also houses various instruments for recording selected operating parameters.
- the gas probes 20, 22 detect a concentration of a gas component in the exhaust gas.
- the gas probe 20 designed as a lambda probe serves to record an oxygen fraction after the internal combustion engine 10 and before the catalyst components 16, 18, while the NO x probe 22 measures a NO x concentration behind the NO x storage catalyst 18.
- the temperature sensors 24, 26 arranged in front of and behind the NO x storage catalytic converter 18 serve to determine a catalytic converter temperature.
- one or even both temperature sensors 24, 26 can be dispensed with and a temperature of the NO x storage catalytic converter can be derived empirically. All signals detected by the gas probes 20, 22 and the temperature sensors 24, 26 find their way into an engine control unit 28, where they are first digitized and then further processed in order to control an operating mode of the internal combustion engine 10.
- the engine control unit 28 regulates, for example, an air-fuel mixture to be fed into the internal combustion engine 10 by influencing a position of a throttle valve 30 in an intake pipe 32 and / or an exhaust gas recirculation device 34.
- the actuators 30, 34 shown by way of example can, for example, lean or an Fat mode for the internal combustion engine 10 can be set.
- a control unit 36 is also integrated in the engine control unit 28, in which a procedure for controlling the desulfurization of the NO x storage catalytic converter 18, which is explained in more detail below, is stored.
- the control unit 36 can also be implemented independently of the engine control unit 28.
- FIG. 2 shows the time course of a relative NO x activity NOA re
- the relative NO x activity denotes NOA re
- the NO x activity NOA itself here is the ratio of the NO x concentration measured behind the NO x storage catalytic converter 18 to the NO x probe 22 of the NO x concentration present in front of the NO x storage catalytic converter 18.
- the NO x concentration upstream of the NO x storage catalytic converter 18, that is to say the raw NO x emission, is preferably calculated by the engine control unit 28 on the basis of current operating parameters of the internal combustion engine 10. Alternatively, it can also be measured with a NO x probe arranged in front of the NO x storage catalytic converter 18 in the exhaust line 14. The calculation of the NO x activity NOA or the relative NO x activity NOA re
- the NO x storage catalytic converter 18 has the NO x activity NOA similar to that of a fresh catalytic converter, so that the relative NO x activity NOA re
- Falling below a first threshold value SW for the relative NO x activity triggers a first desulfurization 40 of the NO x storage catalytic converter 18 at the time t-
- a minimum temperature of the catalyst required for the desulfurization is set and the internal combustion engine 10 is operated in a rich operating mode in accordance with a lambda fat specification for a predetermined or regulated desulfurization period.
- a lambda fat specification for a predetermined or regulated desulfurization period.
- the rich-lean lambda specifications of the intervals, a switching frequency or a position of the rich-lean switching thresholds after the NO x storage catalytic converter 18 can be specified as additional desulfurization parameters.
- the position of the threshold value SW is redefined by the control unit 36 in accordance with a recovered relative NO x starting activity NOAMX, the threshold value SW preferably being proportional to the recovered NO x starting activity NOAMX.
- NOAMX a desulfurization NO x -Anfangsmodtician NOAMX corresponds with progressive operating time t less and less of a fresh NO x - storage catalyst and decreases with increasing aging of the catalyst.
- Reasons for this are, for example, incomplete desulfurization and / or irreversible thermal damage to the NO x storage catalytic converter 18.
- the threshold value SW As a result of the decreasing NO x starting activity NOAMX, the threshold value SW, the undershoot of which triggers desulfurization, is increasingly reduced.
- the cycles of the sulphurisation 38 and desulphurization 40 are repeated until the NO x activity NOA a not to be lower border threshold value, the Damage limit value SW
- the hard desulfurization is advantageously only initiated when predetermined boundary conditions, for example a minimum temperature of the NO x storage catalytic converter 18 and / or a minimum vehicle speed maintained over a minimum period, are present. In this way, the fuel consumption for the energetically extremely demanding hard desulfurization can be kept relatively low.
- the hard desulfurization 42 differs from the previous desulfurization 40 in that at least one of the desulfurization parameters mentioned (for example catalyst temperature, lambda, time specification) is selected in accordance with a higher desulfurization efficiency. For example, an extended desulfurization period and / or a lower lambda fat specification can be provided for the hard desulfurization 42.
- NOAMX different levels of NO x starting activities NOAMX are recovered after the hard desulfurization 42.
- the recovered NO x activity NOAMX corresponds approximately to that of a sulfur-free, undamaged catalyst.
- the catalytic converter 18 has practically no permanent damage and the previous loss of activity is due to incomplete, previous desulfurization 40.
- the hard desulfurization 42 does not completely restore the original NO x activity, but it does so to a considerable extent. This indicates the presence of irreversible damage to the catalyst but also incomplete desulfurization 40.
- both scenarios 44, 46 lean operation of the internal combustion engine 10 is still permitted, it being possible for a lower threshold value to be specified for the NO x starting activity NOAMX to be recovered.
- the desulfurization parameters for subsequent desulfurization are advantageously adaptively corrected such that improved subsequent desulfurization results can be expected.
- the correction of the desulfurization parameters is all the more important the less the irreversible damage to the NO x storage catalytic converter 18 and the higher the recovered NO x activity NOAMX after the hard desulfurization 42.
- hard desulfurization 42 is practically unsuccessful run. Extensive irreversible damage to the storage catalytic converter 18 must therefore be concluded here.
- the lean operation of the internal combustion engine 10 is finally blocked in this case.
- a warning display can also be provided, which informs a vehicle driver of the condition of the catalytic converter or indicates maintenance that becomes necessary.
- FIG. 3 A course of the relative NO x activity NOA re
- the threshold value SW for the NO x activity NOA is kept constant during the entire vehicle operation.
- the NO x starting activity NOAMX restored after desulfurization 40 decreases.
- the time interval ⁇ in which the NO x storage catalytic converter 18 stores sulfur in the lean mode of the internal combustion engine 10 until the threshold SW is reached becomes shorter and shorter. In other words, a frequency rises, with which desulfurization 40 becomes necessary.
- a criterion for recognizing the need for hard desulfurization 42 can consist in a predetermined maximum desulfurization frequency or in a lower threshold of an NO x starting activity NOAMX recovered after desulfurization. All other method features of this embodiment of the invention correspond to the features shown in FIG. 2 and are not to be explained again here.
- FIG. 4 shows a flow chart to explain the embodiment of the method shown in FIG. 2.
- the process sequence begins with step S1, in which the internal combustion engine 10 is subjected to a lean atmosphere, that is to say with a lambda value> 1.
- step S2 the calculation of the NO x activity NOA based on the measured NO x from the NO probe 22 takes place x - concentration downstream of the NO x storing catalyst 18.
- the NO x -Speichermeditician NOA is compared in step S3 with the threshold value SW , If the NO x activity NOA is above the threshold value SW, the method goes to step S1 and the internal combustion engine 10 continues to be operated in the lean mode.
- step S3 If, on the other hand, it is determined in step S3 that the threshold value SW has been reached or fallen below, the NO x activity NOA is compared with the damage limit value SW
- step S8 a query is made in step S8 as to whether the recovered NO x activity NOAMX is less than a predetermined threshold value SWMX. If this question is answered in the negative, a new threshold value SW is calculated in step S6 as a function of the NO x starting activity NOAMX, whereupon the lean operation is again permitted in step S1. If, on the other hand, the desulfurization success cannot be determined in step S8, the lean operation is finally blocked in step S9.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10001432 | 2000-01-15 | ||
DE2000101432 DE10001432A1 (en) | 2000-01-15 | 2000-01-15 | Control of desulfurization of nitrogen oxides storage catalyst in IC engine exhaust system using sensor downstream from catalyst to determine its activity and desulfurization of catalyst if this falls below threshold value |
PCT/EP2001/000249 WO2001051779A1 (en) | 2000-01-15 | 2001-01-11 | METHOD AND DEVICE FOR CONTROL OF DESULPHURISATION OF AN NOx STORAGE CATALYST ARRANGED IN AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1252419A1 true EP1252419A1 (en) | 2002-10-30 |
EP1252419B1 EP1252419B1 (en) | 2006-01-11 |
Family
ID=7627577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01902302A Expired - Lifetime EP1252419B1 (en) | 2000-01-15 | 2001-01-11 | Method and device for control of desulphurisation of a nox storage catalyst arranged in an exhaust system of an internal combustion engine |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1252419B1 (en) |
JP (1) | JP4619603B2 (en) |
CN (1) | CN1185405C (en) |
AU (1) | AU2001230174A1 (en) |
DE (2) | DE10001432A1 (en) |
ES (1) | ES2256197T3 (en) |
WO (1) | WO2001051779A1 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10114456B4 (en) * | 2000-04-07 | 2011-03-31 | Volkswagen Ag | Apparatus and method for coordinating exhaust gas-relevant measures |
DE10102132B4 (en) * | 2001-01-18 | 2009-12-10 | Volkswagen Ag | Method and device for desulphurizing a NOx storage catalytic converter |
DE10115962B4 (en) * | 2001-03-27 | 2009-03-05 | Volkswagen Ag | Process for the desulfurization of an arranged in the exhaust line of an internal combustion engine NOx storage catalyst |
DE10249609B4 (en) * | 2002-10-18 | 2011-08-11 | Volkswagen AG, 38440 | Method for controlling a NOx storage catalytic converter |
FR2862703B1 (en) * | 2003-11-25 | 2006-02-24 | Peugeot Citroen Automobiles Sa | A NOX TRAP DESULFATATION SYSTEM FOR MOTOR VEHICLE ENGINE |
FR2872213B1 (en) | 2004-06-23 | 2006-11-03 | Peugeot Citroen Automobiles Sa | EMERGENCY MEANS REGENERATION SYSTEM FOR MOTOR VEHICLE ENGINE |
FR2872214B1 (en) | 2004-06-23 | 2006-11-03 | Peugeot Citroen Automobiles Sa | SYSTEM FOR MONITORING THE REGENERATION OF MEANS OF DEPOLLUTION |
FR2872210B1 (en) * | 2004-06-23 | 2006-11-03 | Peugeot Citroen Automobiles Sa | EMERGENCY MEANS REGENERATION SYSTEM FOR MOTOR VEHICLE |
US7481046B2 (en) * | 2005-02-28 | 2009-01-27 | Ford Global Technologies, Llc | Method of desulfating a NOx storage and conversion device |
FR2897103B1 (en) * | 2006-02-09 | 2011-06-10 | Peugeot Citroen Automobiles Sa | SYSTEM AND METHOD FOR SOX REMOVAL (SULFUR OXIDE), STOP MODULE FOR THIS SYSTEM |
FR2897102B1 (en) * | 2006-02-09 | 2012-06-01 | Peugeot Citroen Automobiles Sa | SYSTEM AND METHOD FOR SOX REMOVAL (SULFUR OXIDE), AND GENERATOR OF REQUESTS FOR THIS SYSTEM |
JP4404073B2 (en) * | 2006-06-30 | 2010-01-27 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
JP2009024505A (en) * | 2007-07-17 | 2009-02-05 | Toyota Motor Corp | Exhaust emission control device |
JP5983743B2 (en) * | 2012-06-19 | 2016-09-06 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
JP6102856B2 (en) * | 2014-08-01 | 2017-03-29 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
CN113482752B (en) * | 2021-07-02 | 2022-06-24 | 东风商用车有限公司 | Packaging method of diesel engine post-processing packaging unit |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3203931B2 (en) * | 1994-01-28 | 2001-09-04 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
US5743084A (en) * | 1996-10-16 | 1998-04-28 | Ford Global Technologies, Inc. | Method for monitoring the performance of a nox trap |
DE19705335C1 (en) * | 1997-02-12 | 1998-09-17 | Siemens Ag | Process for the regeneration of a storage catalytic converter |
DE19706608A1 (en) * | 1997-02-20 | 1998-08-27 | Ford Global Tech Inc | Process for the desulfurization of a nitrogen oxide trap in the exhaust system of an internal combustion engine |
JP3645704B2 (en) * | 1997-03-04 | 2005-05-11 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
JP3772478B2 (en) * | 1997-07-17 | 2006-05-10 | 株式会社日立製作所 | Regeneration method of exhaust gas purification catalyst for internal combustion engine |
JP3525708B2 (en) * | 1997-11-10 | 2004-05-10 | 三菱自動車工業株式会社 | Lean-burn internal combustion engine |
JP3805098B2 (en) * | 1998-03-26 | 2006-08-02 | 株式会社日立製作所 | Engine exhaust gas purification control device |
JP3518348B2 (en) * | 1998-07-07 | 2004-04-12 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
US6205773B1 (en) * | 1998-07-07 | 2001-03-27 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification device for an internal combustion engine |
DE19830829C1 (en) * | 1998-07-09 | 1999-04-08 | Siemens Ag | NOX storage catalyst regeneration process |
JP4258923B2 (en) * | 1999-11-22 | 2009-04-30 | マツダ株式会社 | Engine exhaust purification system |
JP2002097939A (en) * | 2001-07-31 | 2002-04-05 | Mitsubishi Motors Corp | Exhaust emission control device for internal combustion engine |
-
2000
- 2000-01-15 DE DE2000101432 patent/DE10001432A1/en not_active Withdrawn
-
2001
- 2001-01-11 ES ES01902302T patent/ES2256197T3/en not_active Expired - Lifetime
- 2001-01-11 DE DE50108667T patent/DE50108667D1/en not_active Expired - Lifetime
- 2001-01-11 EP EP01902302A patent/EP1252419B1/en not_active Expired - Lifetime
- 2001-01-11 CN CN 01803765 patent/CN1185405C/en not_active Expired - Fee Related
- 2001-01-11 JP JP2001551959A patent/JP4619603B2/en not_active Expired - Fee Related
- 2001-01-11 WO PCT/EP2001/000249 patent/WO2001051779A1/en active IP Right Grant
- 2001-01-11 AU AU2001230174A patent/AU2001230174A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO0151779A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE50108667D1 (en) | 2006-04-06 |
CN1185405C (en) | 2005-01-19 |
CN1395648A (en) | 2003-02-05 |
JP2003519744A (en) | 2003-06-24 |
WO2001051779A1 (en) | 2001-07-19 |
DE10001432A1 (en) | 2001-08-16 |
ES2256197T3 (en) | 2006-07-16 |
EP1252419B1 (en) | 2006-01-11 |
JP4619603B2 (en) | 2011-01-26 |
AU2001230174A1 (en) | 2001-07-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0892158B1 (en) | Method and device to monitor the desulphurization of NOx storage catalytic converters | |
EP1250524B1 (en) | METHOD FOR DESULPHURISATION OF AN NOx ACCUMULATOR-CATALYST ARRANGED IN AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE | |
EP1252419A1 (en) | Method and device for control of desulphurisation of a nox storage catalyst arranged in an exhaust system of an internal combustion engine | |
EP1088157B1 (en) | METHOD FOR DESULPHATIZING AN NO x? ACCUMULATOR CATALYTIC CONVERTER | |
EP1183453B1 (en) | METHOD FOR DESULFURIZATION OF AT LEAST ONE NOx STORAGE CATALYST MOUNTED IN THE EXHAUST GAS DUCT OF AN INTERNAL COMBUSTION ENGINE | |
DE10226187B4 (en) | Method and device for quantifying oxygen stored in an emission-limiting device | |
EP1086741B1 (en) | Process for controlling the regeneration of a particulate filter and the desulphurisation of a NOx storage catalyst | |
EP1192343B1 (en) | METHOD FOR INITIATING AND MONITORING A DESULFURIZATION OF AT LEAST ONE NOx STORAGE-TYPE CATALYTIC CONVERTER ARRANGED IN AN EXHAUST CHANNEL OF AN INTERNAL COMBUSTION ENGINE | |
DE102006035283B4 (en) | Method for determining the sulfur discharge of a NOx storage catalyst | |
EP1190164B1 (en) | METHOD FOR DETECTING DETERIORATION OF AT LEAST ONE NOx STORAGE CATALYST ARRANGED IN THE EXHAUST LINE OF AN INTERNAL COMBUSTION ENGINE | |
DE10003903B4 (en) | Device and method for controlling an operation of a multi-cylinder engine for motor vehicles with a multi-flow exhaust gas purification system | |
DE10153901B4 (en) | Method and device for desulfurization of a diesel engine downstream NOx storage catalyst | |
DE10016219A1 (en) | Control of hot regeneration stage in engine exhaust purification system, determines temperatures, flow rate and composition, to control total energy input | |
DE10102132B4 (en) | Method and device for desulphurizing a NOx storage catalytic converter | |
DE19926148A1 (en) | Process for increasing the NOx conversion rate of damaged NOx storage catalysts | |
DE102008055750B4 (en) | Exhaust gas purification device for an internal combustion engine | |
EP1303690B1 (en) | Method for adapting a required catalyst temperature range for a no x? storage catalyst | |
DE10115962B4 (en) | Process for the desulfurization of an arranged in the exhaust line of an internal combustion engine NOx storage catalyst | |
DE19923498A1 (en) | Controlling the regeneration of a nitrogen oxides storage catalyst in the exhaust gas channel of an IC engine comprises comparing the measured nitrogen oxides concentration with a set concentration after the storage catalyst | |
DE10036390B4 (en) | Method and device for desulphurizing a NOx storage catalytic converter | |
EP1188915B1 (en) | Method for regulating the regeneration of a NOx storage catalyst | |
DE10001310A1 (en) | Device and method for controlling a NOx regeneration of a NOx storage catalytic converter | |
DE10349854B4 (en) | Method and device for desulphurizing a NOx storage catalytic converter | |
DE10230676B4 (en) | Method for thermal regeneration of an exhaust gas purification device and internal combustion engine system | |
EP1544430A1 (en) | Method for operating a NOx storage catalyst |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20020816 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SCHULZE, FRANK Inventor name: HINZE, SOEREN Inventor name: DRUECKHAMMER, JENS Inventor name: LANG, AXEL Inventor name: ZILLMER, MICHAEL Inventor name: POTT, EKKEHARD Inventor name: HAHN, HERMANN |
|
RBV | Designated contracting states (corrected) |
Designated state(s): DE ES FR GB IT |
|
17Q | First examination report despatched |
Effective date: 20041209 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HAHN, HERMANN Inventor name: POTT, EKKEHARD Inventor name: HINZE, SOEREN Inventor name: LANG, AXEL Inventor name: DRUECKHAMMER, JENS Inventor name: ZILLMER, MICHAEL Inventor name: SCHULZE, FRANK |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB IT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20060111 Ref country code: GB Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060111 |
|
REF | Corresponds to: |
Ref document number: 50108667 Country of ref document: DE Date of ref document: 20060406 Kind code of ref document: P |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2256197 Country of ref document: ES Kind code of ref document: T3 |
|
GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] |
Effective date: 20060111 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20061012 |
|
EN | Fr: translation not filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20070302 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060131 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20060111 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20150225 Year of fee payment: 15 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20170228 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20170131 Year of fee payment: 17 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160112 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 50108667 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180801 |