WO2007012597A1 - Verfahren und vorrichtung zur diagnose einer abgasreinigungsanlage - Google Patents
Verfahren und vorrichtung zur diagnose einer abgasreinigungsanlage Download PDFInfo
- Publication number
- WO2007012597A1 WO2007012597A1 PCT/EP2006/064458 EP2006064458W WO2007012597A1 WO 2007012597 A1 WO2007012597 A1 WO 2007012597A1 EP 2006064458 W EP2006064458 W EP 2006064458W WO 2007012597 A1 WO2007012597 A1 WO 2007012597A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exhaust gas
- catalyst
- catalytic converter
- oxygen storage
- main
- Prior art date
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Classifications
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- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/101—Three-way catalysts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
- F01N13/107—More than one exhaust manifold or exhaust collector
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- 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
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- 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
- F01N2550/03—Monitoring or diagnosing the deterioration of exhaust systems of sorbing activity of adsorbents or absorbents
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- 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
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- 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
- F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
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- 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
- F01N2570/16—Oxygen
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- 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
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- 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
- F01N3/0864—Oxygen
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- 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
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- 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
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
- F02D41/1441—Plural sensors
- F02D41/1443—Plural sensors with one sensor per cylinder or group of cylinders
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to a method and a device for diagnosing an exhaust gas purification system.
- a new monitoring function is required for new vehicles with an internal combustion engine, which monitors compliance with the maximum permissible emissions of hydrocarbons, carbon monoxide and nitrogen oxides.
- an internal combustion engine which monitors compliance with the maximum permissible emissions of hydrocarbons, carbon monoxide and nitrogen oxides.
- diagnostic functions are integrated within the engine control of the internal combustion engine.
- the diagnosis of present in the exhaust tract of the internal combustion engine Kataly ⁇ catalysts this is particularly important.
- OSC oxygen storage capacity
- oxy gen Storage Capacity determines the catalyst and is used to convert a measure of the ability of the catalyst hydrocarbons, Koh ⁇ monoxide and nitrogen oxides.
- the core of the OSC-based catalyst diagnosis is the determination of the oxygen storage capacity of the catalyst. Oxygen levels are recognized for this purpose usually wel ⁇ che flow into a defined period of time in the catalyst or flow out again. At the same time it must be ensured by appropriate measures that the be ⁇ already caused no error in the OSC-determination in the catalyst amount of oxygen stored.
- the object of the invention is to provide a method and a device with which the diagnosis of a single catalytic converter of an emission control system in Y configuration, despite the absence of an exhaust gas probe between the individual catalyst and a main catalytic converter, can be made possible.
- the object is solved by the features of the independent claims.
- Advantageous embodiments of the invention are characterized in the subclaims.
- the invention is characterized by a method and apparatus for diagnosing a Einzelkatalysa ⁇ tors an emission control system in Y-configuration, despite a lack of exhaust gas sensor between the individual catalyst (in the constricting folic as a second single catalyst hereinafter) and a
- Main catalytic converter in which the diagnosis is based on the signals from exhaust gas probes associated with the exhaust gas purification system.
- the oxygen storage capacity of the other present in the exhaust gas purification plant Einzelkata- analyzer (hereinafter referred to as the first single catalyst) is determined based on the signals of two exhaust probes with the known method, with an exhaust probe upstream and another exhaust probe between the first single catalyst and the main catalyst is.
- the sum of the oxygen storage capacities of the first single catalyst and the main catalyst is at ⁇ hand the signals of the exhaust gas probe upstream of the first A ⁇ zelkatalysators and the signals of an exhaust gas probe downstream of the main catalyst determined. Further, the sum of the oxygen storage capacities of the second single catalyst and the main catalyst based on the signals from a ⁇ gas probe upstream of the second catalyst and the individual signals of the exhaust gas probe downstream of the main catalyst loading true.
- the oxygen storage ability of the second Einzelka ⁇ talysators is based on the oxygen storage capacity of the first single catalyst, the sum of the oxygen storage capacities of the first single catalyst and the Hauptkata ⁇ lysators and the sum of the oxygen storage capacities of the second single catalyst and the main catalyst ermit ⁇ telt.
- the diagnosis of the second single catalyst is carried out by means of the oxygen storage capability.
- the method has the advantage that a diagnosis of the second individual catalytic converter, rule despite the lack of exhaust probe Zvi ⁇ can take place the second individual catalytic converter and the main catalytic converter.
- the exhaust gas purification system by the Abandonment of an exhaust gas probe can be realized inexpensively.
- a determination of the oxygen storage capabilities of the second single catalyst is also possible in the event that its oxygen storage capacity is much lower than that of the main catalyst.
- the oxygen storage capacity of the second individual catalyst is determined according to the following formula:
- OSC2 OSCI + OSC2HK - OSClHK
- the determination of the oxygen storage capacity of the second individual catalyst can also be carried out using a slightly modified process.
- the oxygen storage capacity of the main catalytic converter is determined based on the signals of the exhaust gas probe between the first single catalytic converter and the main catalytic converter and the signals of the exhaust gas probe downstream of the main catalytic converter.
- the sum of the oxygen storage capacities of the second single catalyst and the main catalyst based on the signals of the exhaust gas probe upstream of the second catalyst and the individual signals of the exhaust gas probe downstream of the determined Hauptkataly ⁇ crystallizer.
- the oxygen storage ability of the second single catalyst is based on the Sauerstoff arrivedtähig- ness of the main catalyst and the sum of SauerstoffSpei ⁇ cherrichen of the second single catalyst and the main catalyst ⁇ determined.
- the oxygen storage capacity of the second A ⁇ zelkatalysators is determined according to the following formula:
- OSC2 OSC2HK - OSCHK
- OSC2 the oxygen storage capacity of the second A ⁇ zelkatalysators
- OSC2HK the sum of the SauerstoffSpeicherfä ⁇ skills of the second single catalyst and the Hauptkataly ⁇ crystallizer and OSCHK denote the oxygen storage capability of OUT THE MAIN ⁇ talysators.
- This formula allows a simple calculation of the oxygen storage capacity of the second A ⁇ zelkatalysators. Furthermore, the difference formation reduces the influence of errors in the measurement of the signals of the exhaust gas probes and errors of the exhaust gas probes on the determination of the oxygen storage capacity.
- the oscillation parameters curve shape, amplitude, period duration
- a significantly higher oxygen charge amount of oxygen which has to be alternately stored or purged
- a variation of the parameters amplitude and excitation duration is usually dispensed with.
- the determination of the oxygen storage capacity of the catalyst is carried out by
- the method is used for an internal combustion engine, the predominant In excess of stoichiometric operation (lean operation) work ⁇ tet.
- This operation produces high levels of nitrogen oxides, which require efficient purification of the exhaust gas. Efficient cleaning can be ensured by an exhaust gas purifier in Y configuration.
- the first and second individual catalytic converter are designed as a three-way catalytic converter and the main catalytic converter as an NOx catalytic converter.
- the determination of the individual oxygen storage capacities takes place on the basis of the signals of the exhaust gas probes detected during a regeneration phase of the NOx storage catalytic converter.
- the lambda value of the exhaust gas is changed abruptly. These jumps can be used to determine the oxygen storage capacity. This allows the determination of
- Oxygen storage capacity can be carried out without se by the Katalysatordiagno ⁇ caused additional emissions and without additional fuel for the determination to consumer- ⁇ chen.
- the determination of the oxygen storage capacities OSClHK and OSC2HK takes place at the end of a regeneration of the NOx storage catalytic converter.
- (z. B. lambda> 1.05) in the determination of OSClHK the lambda value of the air flowing through the first individual exhaust gas catalyst according to lean ge ⁇ is selected so that the NOx storage catalytic converter in the state offset which in the Gas stored nitrogen oxides can be stored again. This ensures that the determination of OSClHK does not result in additional nitrogen oxide emissions.
- the lambda value of the air flowing through the second individual exhaust gas catalyst according to lean ge ⁇ selects (z. B. lambda> 1.05), so that the NOx
- Storage catalytic converter is placed in the state to be able to store the nitrogen oxides contained in the exhaust again.
- the first individual catalytic converter is operated with a slightly superstoichiometric exhaust gas (eg 1.0 ⁇ lambda ⁇ 1.01).
- a slightly superstoichiometric exhaust gas eg 1.0 ⁇ lambda ⁇ 1.01.
- the first single catalyst is slowly filled with oxygen.
- the filling must be very slow to ensure that no oxygen from the first single catalyst falsifies the result in the determination of OSC2HK. Compliance with this requirement can be monitored with the exhaust gas probe arranged between the first individual catalytic converter and the NOx catalytic converter.
- the determination of OSCl can be accelerated.
- the advantage of the determination of OSCl according to this embodiment is to reduce the influence of measurement errors of the exhaust gas sensors due to dynamic processes, because the process runs slower with respect to the determination of OSCl in a regeneration of the NOx storage catalytic converter from ⁇ .
- the exhaust gas probes are realized upstream of the first and the second Einzelkatalysa- sector as a linear lambda exhaust gas probes.
- the exhaust gas ⁇ de between the first single catalyst and the main catalyst is designed as a binary lambda exhaust gas probe.
- the exhaust gas probe downstream of the main catalyst designed as a lambda lambda exhaust gas probe or as a NOx exhaust gas probe with lambda signal output. This configuration allows efficient determination of oxygen storage capabilities.
- FIG. 2 shows temporal courses of the signals of exhaust gas probes for illustrating the method according to the invention.
- Internal combustion engine 1 has two cylinder banks 2, 3.
- the cylinder bank 2 is an exhaust bank 5 and the cylinder bank 3 is associated with an exhaust bank 4 for cleaning the exhaust gas generated by the respective cylinder bank 2, 3.
- the exhaust gas bank 4 comprises a single catalytic converter 6 and the exhaust gas bank 5 comprises a single catalytic converter 7 for cleaning the exhaust gases generated in the respective cylinder banks 2, 3.
- Downstream exhaust pipes 8, 9 of the exhaust banks 4, 5 are brought together in a common exhaust pipe 10.
- the common exhaust pipe opens into a main catalyst 11.
- the main catalyst 11 is used to remove pollutants from the exhaust gas, which can be removed only inadequately with the individual catalysts 6, 7.
- the main catalytic converter 11 can be embodied as a NOx storage catalytic converter 11 and the individual catalytic converters 6, 7 as a three-way catalytic converter.
- the exhaust gas purification system An exhaust gas probe 12 upstream of a first single catalyst 6, an exhaust ⁇ probe 13 upstream of a second individual catalytic converter 7, an exhaust gas probe 14 between the first individual catalytic converter 6 and the main catalyst 11 and an exhaust gas probe 15 downstream ⁇ Wind concern on the main catalytic converter.
- the exhaust gas probes 12, 13, 14, 15 may for example be designed as linear or binary lambda probes.
- the signals of the exhaust gas probes 12, 13, 14, 15 are detected by an electronic computing unit 16. The signals can be used to control the air-fuel mixture supplied to the internal combustion engine 1, to regenerate individual catalysts or to determine the oxygen storage capacities of individual catalysts.
- the time profiles of the signals of the exhaust gases 12, 13, 14, 15 are shown in FIG.
- the internal combustion engine 1 operates predominantly in the superstoichiometric operation (lean operation).
- the main catalytic converter 11 is configured as a NOx storage catalytic converter and the single catalytic converters 6, 7 as a three-way catalytic converter.
- the exhaust gas probes 12, 13 are realized upstream of the two individual catalytic converters 6, 7 as a linear lambda probe and the exhaust gas probe 14 between the first individual catalytic converter 6 and the NOx storage catalytic converter as a binary lambda probe.
- the exhaust gas sensor 15 downstream of the current ⁇ NOx storage catalytic converter is designed as a binary lambda probe or as a NOx sensor with lambda signal output.
- the diagnosis of the exhaust gas purification system is carried out by means of two diagnostic cycles, wherein for the diagnosis within the individual diagnostic cycles each sudden changes in the course of the lambda value of the exhaust gas due to a regeneration of the NOx storage catalytic converter can be used.
- the rich exhaust gas reaches the NOx storage catalytic converter.
- the stored oxygen and stored nitrogen oxides are released.
- the oxygen is again used directly for the oxidation of the hydrocarbons and carbon monoxides contained in the exhaust gas.
- the stored nitrogen oxides are first reduced to nitrogen and oxygen.
- the oxygen produced is because ⁇ used again for the oxidation of hydrocarbons and carbon monoxides at once.
- the rich exhaust gas can no longer be oxidized. This leads to so-called fat breakthrough, which is displayed by the lambda signal of the exhaust gas probe 15 downstream of the NOx storage catalyst at time t3. This point in time marks the end of the first regeneration of the NOx storage catalytic converter.
- the operation is shown with an oscillating curve of the lambda value and apparent in the course of the Sig ⁇ Nals the linear exhaust-gas probe 12th
- a second exhaust gas bank 5 is operated with lean exhaust gas, the lambda value of the exhaust gas having a defined value.
- ⁇ is waited for the complete filling of the second Einzelkata ⁇ lysators 7 and the NOx storage catalyst with oxygen hol d.
- the end of this process is indicated on the basis of the lambda signal of the exhaust gas probe 15 downstream of the NOx storage catalytic converter at time t4.
- OSC2HK By ei ⁇ ner oxygen balance is determined OSC2HK.
- the signals of the exhaust gas probes 12, 13, 14, 15 are used during the subsequent regeneration of the NOx storage catalytic converter.
- the first exhaust bank 4 is operated from the ⁇ sem point in time with lean exhaust gas, wherein the lambda value of the exhaust gas has a defined value. Ssend subse- complete filling of the first Einzelkataly ⁇ crystallizer 6 and the NOx storage catalytic converter is serviced with oxygen from ⁇ . The end of this process is indicated on the basis of the lambda signal of the exhaust gas probe 15 downstream of the NOx storage catalytic converter at time t6. Oxygen balancing is used to determine OSClHK.
- OSC2 OSCI + OSC2HK - OSClHK
- the lambda value of the exhaust gas is chosen so that the NOx storage catalyst is already able to corresponds in the exhaust nitrogen oxides suspended again to save (eg Lambda>
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Health & Medical Sciences (AREA)
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- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06777862A EP1778963A1 (de) | 2005-07-26 | 2006-07-20 | Verfahren und vorrichtung zur diagnose einer abgasreinigungsanlage |
KR1020077007166A KR101316772B1 (ko) | 2005-07-26 | 2006-07-20 | 배기 가스 정화 유닛의 분석 방법 및 장치 |
US11/666,003 US7484407B2 (en) | 2005-07-26 | 2006-07-20 | Method and device for diagnosis of an exhaust gas cleaning system |
JP2007537309A JP2008517213A (ja) | 2005-07-26 | 2006-07-20 | 排ガス浄化装置の診断方法および診断装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005034880A DE102005034880B4 (de) | 2005-07-26 | 2005-07-26 | Verfahren und Vorrichtung zur Diagnose einer Abgasreinigungsanlage |
DE102005034880.7 | 2005-07-26 |
Publications (1)
Publication Number | Publication Date |
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WO2007012597A1 true WO2007012597A1 (de) | 2007-02-01 |
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ID=36968194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2006/064458 WO2007012597A1 (de) | 2005-07-26 | 2006-07-20 | Verfahren und vorrichtung zur diagnose einer abgasreinigungsanlage |
Country Status (6)
Country | Link |
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US (1) | US7484407B2 (de) |
EP (1) | EP1778963A1 (de) |
JP (1) | JP2008517213A (de) |
KR (1) | KR101316772B1 (de) |
DE (1) | DE102005034880B4 (de) |
WO (1) | WO2007012597A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2006080868A1 (en) * | 2005-01-25 | 2006-08-03 | Gas Turbine Efficiency Ab | Probe cleaning method and apparatus |
US8065871B1 (en) | 2007-01-02 | 2011-11-29 | Cummins Ip, Inc | Apparatus, system, and method for real-time diagnosis of a NOx-adsorption catalyst |
DE102007022592A1 (de) * | 2007-05-14 | 2008-11-27 | Robert Bosch Gmbh | Verfahren zur Bestimmung einer Kraftstoffzusammensetzung |
DE102007060421B4 (de) * | 2007-12-14 | 2013-10-31 | Audi Ag | Verfahren zur Bewertung eines aus wenigstens zwei Katalysatoren bestehenden Katalysatorsystems für ein Kraftfahrzeug sowie zugehörige Mess- und Diagnoseeinrichtung |
DE102009015188B4 (de) * | 2009-03-31 | 2011-12-15 | Avl Emission Test Systems Gmbh | Anlage zur Entnahme von Abgasproben von Verbrennungskraftmaschinen und deren Verwendung |
US8240194B2 (en) * | 2009-07-30 | 2012-08-14 | Ford Global Technologies, Llc | Methods and systems for diagnostics of an emission system with more than one SCR region |
US8490383B2 (en) * | 2009-09-14 | 2013-07-23 | Fev Gmbh | Exhaust system for internal combustion engine |
US8756922B2 (en) | 2011-06-10 | 2014-06-24 | Cummins Ip, Inc. | NOx adsorber catalyst condition evaluation apparatus and associated methods |
US9528462B2 (en) * | 2012-06-15 | 2016-12-27 | GM Global Technology Operations LLC | NOx sensor plausibility monitor |
KR101683988B1 (ko) * | 2014-10-20 | 2016-12-07 | 현대자동차주식회사 | 압축천연가스 엔진 공연비 제어방법 |
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FR2739139A1 (fr) * | 1995-09-21 | 1997-03-28 | Peugeot | Dispositif de diagnostic de l'efficacite d'un catalyseur de gaz d'echappement d'un moteur a combustion a deux rangees de cylindres |
EP1143131A2 (de) * | 2000-04-07 | 2001-10-10 | Volkswagen Aktiengesellschaft | Mehrflutige Abgasanlage und Verfahren zur Regelung eines Luft-Kraftstoff-Verhältnisses und Steuerung einer NOx-Regeneration eines NOx-Speicherkatalysators |
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DE4128823C2 (de) * | 1991-08-30 | 2000-06-29 | Bosch Gmbh Robert | Verfahren und Vorrichtung zum Bestimmen des Speichervermögens eines Katalysators |
DE19803828B4 (de) * | 1998-01-31 | 2010-05-12 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Beurteilung der Konvertierungsfähigkeit eines Katalysators |
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US6662638B2 (en) * | 2001-11-26 | 2003-12-16 | Ford Global Technologies, Llc | System and method for determining degradation of an exhaust gas sensor in an engine |
US6840036B2 (en) * | 2002-08-30 | 2005-01-11 | Ford Global Technologies, Llc | Control of oxygen storage in a catalytic converter |
DE10313331B4 (de) | 2003-03-25 | 2005-06-16 | Siemens Audiologische Technik Gmbh | Verfahren zur Bestimmung einer Einfallsrichtung eines Signals einer akustischen Signalquelle und Vorrichtung zur Durchführung des Verfahrens |
DE10331331B4 (de) * | 2003-07-10 | 2012-03-01 | Volkswagen Ag | Verfahren zum Betreiben einer Brennkraftmaschine |
DE102004043535B4 (de) * | 2004-09-08 | 2007-08-30 | Siemens Ag | Verfahren zur Diagnose von zylinderbezogenen Einzelkatalysatoren einer Otto-Mehrzylinder-Brennkraftmaschine |
DE102005062122B4 (de) * | 2005-12-23 | 2016-06-30 | Robert Bosch Gmbh | Verfahren und Steuergerät zur Diagnose eines Katalysatorsystems eines Verbrennungsmotors |
-
2005
- 2005-07-26 DE DE102005034880A patent/DE102005034880B4/de not_active Expired - Fee Related
-
2006
- 2006-07-20 KR KR1020077007166A patent/KR101316772B1/ko active IP Right Grant
- 2006-07-20 US US11/666,003 patent/US7484407B2/en active Active
- 2006-07-20 EP EP06777862A patent/EP1778963A1/de not_active Withdrawn
- 2006-07-20 JP JP2007537309A patent/JP2008517213A/ja active Pending
- 2006-07-20 WO PCT/EP2006/064458 patent/WO2007012597A1/de active Application Filing
Patent Citations (4)
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US5233829A (en) * | 1991-07-23 | 1993-08-10 | Mazda Motor Corporation | Exhaust system for internal combustion engine |
FR2739139A1 (fr) * | 1995-09-21 | 1997-03-28 | Peugeot | Dispositif de diagnostic de l'efficacite d'un catalyseur de gaz d'echappement d'un moteur a combustion a deux rangees de cylindres |
EP1143131A2 (de) * | 2000-04-07 | 2001-10-10 | Volkswagen Aktiengesellschaft | Mehrflutige Abgasanlage und Verfahren zur Regelung eines Luft-Kraftstoff-Verhältnisses und Steuerung einer NOx-Regeneration eines NOx-Speicherkatalysators |
EP1457654A1 (de) * | 2003-03-14 | 2004-09-15 | Volkswagen AG | Verfahren zur Ermittlung der Sauerstoffspeicherfähigkeit von Katalysatoren in mehrflutigen Abgasanlagen sowie Vorrichtung zur Durchführung des Verfahrens |
Also Published As
Publication number | Publication date |
---|---|
DE102005034880B4 (de) | 2007-06-06 |
DE102005034880A1 (de) | 2007-02-01 |
US7484407B2 (en) | 2009-02-03 |
JP2008517213A (ja) | 2008-05-22 |
EP1778963A1 (de) | 2007-05-02 |
KR101316772B1 (ko) | 2013-10-10 |
KR20080030544A (ko) | 2008-04-04 |
US20080105031A1 (en) | 2008-05-08 |
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