EP4259910A1 - Verfahren zum betreiben einer abgasnachbehandlungsanlage - Google Patents
Verfahren zum betreiben einer abgasnachbehandlungsanlageInfo
- Publication number
- EP4259910A1 EP4259910A1 EP21806233.9A EP21806233A EP4259910A1 EP 4259910 A1 EP4259910 A1 EP 4259910A1 EP 21806233 A EP21806233 A EP 21806233A EP 4259910 A1 EP4259910 A1 EP 4259910A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- catalytic converter
- exhaust gas
- way catalytic
- secondary air
- oxygen filling
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003197 catalytic effect Effects 0.000 claims abstract description 71
- 239000007789 gas Substances 0.000 claims abstract description 57
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 42
- 239000001301 oxygen Substances 0.000 claims abstract description 42
- 238000002485 combustion reaction Methods 0.000 claims abstract description 14
- 239000003054 catalyst Substances 0.000 claims description 15
- 239000000523 sample Substances 0.000 claims description 15
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 description 15
- 231100000719 pollutant Toxicity 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012821 model calculation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001052 transient effect Effects 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
- F01N3/10—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
-
- 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
-
- 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
-
- 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
- F01N3/18—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 characterised by methods of operation; Control
- F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
-
- 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
- F01N3/18—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 characterised by methods of operation; Control
- F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
- F01N3/225—Electric control of additional air supply
-
- 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
- F01N3/24—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 characterised by constructional aspects of converting apparatus
- F01N3/30—Arrangements for supply of additional air
-
- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/005—Electrical control of exhaust gas treating apparatus using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly
-
- 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
- F01N2270/00—Mixing air with exhaust gases
-
- 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
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/06—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture
-
- 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
- F01N2550/14—Systems for adding secondary air into exhaust
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- 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
- F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1624—Catalyst oxygen storage capacity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to a method for operating an exhaust gas aftertreatment system for the aftertreatment of exhaust gases from an internal combustion engine, in particular an Otto engine, with the features of the preamble of claim 1 the method according to the invention can be operated.
- the exhaust gases from internal combustion engines are subjected to exhaust gas after-treatment in order to comply with the legally required limit values for pollutant emissions in most countries.
- At least one catalytic converter for example a three-way catalytic converter, is used.
- the three-way catalytic converter Three Pollutant components contained in the exhaust gas, namely CO, HC and NOx, can be converted.
- the object on which the invention is based is therefore to register such pollutant breakthroughs or unfavorable operating states of the second TWC at an early stage and to prevent them by taking targeted countermeasures. It should be possible to carry out these countermeasures independently of the current driving situation.
- the oxygen level is determined using a measuring device and / or simulated, with a specific oxygen level via a secondary air source, secondary air in the exhaust gas path between the first and is introduced to the second three-way catalyst so that the oxygen filling state of the second catalyst is increased.
- the simulative determination of the oxygen filling level is based on a catalytic converter model, which is able to adequately depict the condition of the catalytic converter.
- the model calculations take place in an existing and/or separate control unit and/or cloud-based.
- the input variables required for the model calculations come from the engine control unit and/or the separate control unit and/or the cloud and/or one or more measuring devices located before the first three-way catalytic converter and/or before the second three-way catalytic converter and/or after the second three-way catalytic converter .
- the oxygen fill level in the second three-way catalytic converter in good time by introducing secondary air upstream of the second three-way catalytic converter. Since the secondary air is introduced after the first three-way catalyst, the second three-way catalyst can be made lean independently of the first three-way catalyst. Accordingly, the first three-way catalytic converter can be operated in a range that is optimal for this, i.e. with a minimally rich mixture. Likewise, the pollutant emissions can be reduced by introducing secondary air.
- the oxygen filling level of the second three-way catalytic converter is determined using a measured value from a NOx sensor and/or a lambda probe in the exhaust gas.
- the oxygen content in the exhaust gas is determined in a known manner using a lambda probe, which is preferably designed as a lambda jump probe.
- a NOx sensor determines the NOx content and also supplies the oxygen content in the exhaust gas.
- the oxygen fill level is measured directly in the second three-way catalyst. Alternatively or additionally, this can be simulated.
- the measuring device is arranged in such a way that the measured values can be determined within the second three-way catalytic converter. This has the advantage that such a measuring device can indirectly determine the local oxygen filling level. As a result, it is possible to react more quickly to a change in the oxygen filling level, so that the quantity of pollutants emitted can be further reduced.
- the oxygen fill level is determined downstream of the second three-way catalyst.
- a measurement after the three-way catalytic converter considers the NOx, CO, THC, NH3 after exhaust gas treatment in the second three-way catalytic converter or as the end result of the entire exhaust gas treatment. This measures the pollutants released into the environment. Accordingly, corrective action can be taken in good time by adjusting the air-fuel ratio or by feeding in secondary air, and pollutant emissions can be reduced.
- the secondary air to be introduced into the exhaust gas path is made available with the aid of a conveying device, for example a pump.
- a conveying device for example a pump.
- the pump is preferably an already existing pump such as an air pump from cold start emission optimization, from an exhaust gas burner or for preheating an electrically heated catalytic converter. No additional components are therefore necessary, so that the secondary air can be supplied to the exhaust path in a simple and economical manner.
- the secondary air is supplied from a threshold value measured by the measuring device.
- This threshold value is designed in such a way that the oxygen filling level is still sufficient to avoid a direct breakthrough of the pollutants, see above that secondary air can be supplied to the second three-way catalytic converter before a breakthrough.
- This threshold value preferably corresponds to a threshold value of the jump probe and/or a signal threshold of the NOx sensor.
- the secondary air supply is preferably terminated when the measuring device indicates a specified value below the threshold value. In other words, only such an amount of air is supplied as was consumed in the three-way catalytic converter. As a result, energy consumption and noise development for the supply of the secondary air is reduced to a necessary minimum.
- the secondary air supply is increased with a decreasing oxygen fill level.
- secondary air is already supplied when a falling oxygen fill level is determined.
- the oxygen filling level can be kept constant, apart from control-related deviations. Accordingly, this counteracts a falling oxygen filling state, so that a state in which pollutants break through is not reached.
- a further reduction in the pollutants emitted can be achieved, since an oxygen filling state that is optimal for oxidizing the pollutants is made possible as far as possible.
- an exhaust aftertreatment system for an internal combustion engine in particular for an Otto engine, with several catalytic converters connected in series is proposed, comprising a first three-way catalytic converter and a second three-way catalytic converter, to which exhaust gas of the internal combustion engine can be supplied via an exhaust gas path.
- a mixing point is arranged downstream of the first three-way catalytic converter and upstream of the second three-way catalytic converter, via which secondary air from a secondary air source can be fed to the exhaust gas path, and that a measuring device is arranged in the area of the second three-way catalytic converter, with which the oxygen filling level of the second three-way catalytic converter can be determined.
- the proposed exhaust gas aftertreatment system is particularly suitable for carrying out the method according to the invention described above or operable according to this method.
- the oxygen filling level of the second three-way catalytic converter can thereby be determined separately.
- a lean position of the second three-way catalytic converter is possible without influencing an operating mode of the first three-way catalytic converter.
- the measuring device is designed as a lambda probe or NOx sensor and is arranged after or in the second three-way catalytic converter.
- a corresponding arrangement of the sensors has the advantages of such a measuring position mentioned in the method.
- Figure 1 is a schematic representation of an internal combustion engine with an exhaust gas aftertreatment system according to the invention.
- FIG. 2 shows a flowchart for the graphical representation of the sequence of a method according to the invention.
- FIG. 1 shows an internal combustion engine 1 which is connected to an exhaust gas path 2 on the outlet side.
- the exhaust gas occurring during the combustion process in the internal combustion engine 1 is discharged via the exhaust gas path 2 .
- the exhaust gas is subjected to exhaust gas aftertreatment.
- two series-connected three-way catalytic converters 3, 4 are arranged in the exhaust gas path 2.
- a mixer 5 is arranged in the exhaust gas path 2 between the first three-way catalytic converter 3 and the second three-way catalytic converter 4 .
- This mixer 5 is also connected via a secondary air line 6 to a secondary air source 7, such as a secondary air pump.
- a secondary air source 7 such as a secondary air pump.
- secondary air can be supplied to the mixer 5 in addition to the exhaust gas.
- the secondary air is mixed with the exhaust gas in the mixer 5 and sent to the second three-way catalytic converter 4 arranged downstream forwarded.
- the second three-way catalyst 4 can be operated lean. Such lean operation is particularly necessary when the oxygen filling state of the second three-way catalyst 4 decreases. In such a case, the CO, HC, NH3 and H2 not converted by the first three-way catalyst 3 can also be converted by the second three-way catalyst 4 . These would otherwise be emitted to the environment.
- a measuring device 8 is arranged after the second three-way catalytic converter 4 in this exemplary embodiment, with which the oxygen filling state can be measured indirectly.
- the measuring device 8 is designed as an NOx sensor, so that the lean gas components NOx and O2 as well as NH3 based on the model can be determined.
- the oxygen filling level can be inferred from the output signals.
- the measured values M are transmitted to a control device 9 . Above a certain threshold value for the measured value M, the control device 9 sends a signal to the secondary air source 7 so that the exhaust gas path 2 is supplied with secondary air.
- the lean operated second three-way catalytic converter 4 increases the oxygen filling level again, so that the CO, HC and NH3 emissions are reduced.
- the exhaust gas path 2 there is also a broadband lambda probe 10 in front of the first three-way catalytic converter 3 and a lambda step probe 11 behind it. These probes 10, 11 are also connected to the control unit 9.
- the oxygen content after the first three-way catalytic converter 3 is measured via the lambda jump probe 11 .
- a first step A the oxygen filling level of the second three-way catalytic converter 4 is determined using the NOx sensor 8 arranged downstream of it.
- a next step B is checks whether the measured value M of the NOx sensor exceeds a threshold value S. Based on the measured value M, the oxygen fill level in the second three-way catalytic converter 4 can be inferred. If the measured value M is below the specified threshold value S, no secondary air is supplied in step C. Instead, after this step C, the method starts again with the determination of the oxygen fill level.
- the secondary air source 7 is activated in a next step D in such a way that a secondary air quantity corresponding to the measured value M is supplied to the exhaust gas path 2 between the three-way catalytic converters 3, 4. After that, it returns to the first step A again.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Materials Engineering (AREA)
- Analytical Chemistry (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020215455.4A DE102020215455A1 (de) | 2020-12-08 | 2020-12-08 | Verfahren zum Betreiben einer Abgasnachbehandlungsanlage |
PCT/EP2021/080739 WO2022122261A1 (de) | 2020-12-08 | 2021-11-05 | Verfahren zum betreiben einer abgasnachbehandlungsanlage |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4259910A1 true EP4259910A1 (de) | 2023-10-18 |
Family
ID=78599014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21806233.9A Pending EP4259910A1 (de) | 2020-12-08 | 2021-11-05 | Verfahren zum betreiben einer abgasnachbehandlungsanlage |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4259910A1 (de) |
CN (1) | CN116601380A (de) |
DE (1) | DE102020215455A1 (de) |
WO (1) | WO2022122261A1 (de) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2864838B2 (ja) * | 1992-01-22 | 1999-03-08 | トヨタ自動車株式会社 | 内燃機関の排気ガス浄化装置 |
DE102016211595A1 (de) * | 2016-06-28 | 2017-12-28 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung und/ oder Überwachung der Funktion einer Sekundärluftzuführung in einer Abgasreinigungsanlage |
DE102016114901A1 (de) | 2016-08-11 | 2018-02-15 | Volkswagen Aktiengesellschaft | Diagnoseverfahren und Vorrichtung zur Überprüfung der Funktionsfähigkeit einer Komponente zur Abgasnachbehandlung |
DE102017107378A1 (de) | 2017-04-06 | 2018-10-11 | Volkswagen Ag | Verfahren zum Aufheizen eines Katalysators sowie Kraftfahrzeug mit einem Katalysator |
DE102017115399A1 (de) | 2017-07-10 | 2019-01-10 | Volkswagen Ag | Abgasnachbehandlungssystem und Verfahren zur Abgasnachbehandlung eines Verbrennungsmotors |
DE102017130886A1 (de) | 2017-12-21 | 2019-06-27 | Volkswagen Aktiengesellschaft | Abgasnachbehandlungssystem und Verfahren zur Abgasnachbehandlung eines Verbrennungsmotors |
DE102018218051A1 (de) * | 2018-10-22 | 2020-04-23 | Robert Bosch Gmbh | Verfahren und Steuergerät zum Betreiben eines eine erste Abgasreinigungskomponente und eine zweite Abgasreinigungskomponente aufweisenden Verbrennungsmotors |
DE102018218138B4 (de) * | 2018-10-23 | 2022-06-23 | Vitesco Technologies GmbH | Verfahren zur Abgasnachbehandlung und Abgasnachbehandlungssystem |
DE102019102928A1 (de) | 2019-02-06 | 2020-08-06 | Volkswagen Aktiengesellschaft | Abgasnachbehandlungssystem sowie Verfahren zur Abgasnachbehandlung eines Verbrennungsmotors |
-
2020
- 2020-12-08 DE DE102020215455.4A patent/DE102020215455A1/de active Pending
-
2021
- 2021-11-05 EP EP21806233.9A patent/EP4259910A1/de active Pending
- 2021-11-05 WO PCT/EP2021/080739 patent/WO2022122261A1/de active Application Filing
- 2021-11-05 CN CN202180082317.2A patent/CN116601380A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2022122261A1 (de) | 2022-06-16 |
CN116601380A (zh) | 2023-08-15 |
DE102020215455A1 (de) | 2022-06-09 |
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