WO2019025129A1 - Procédé pour déterminer l'état de charge d'un catalyseur scr et système de catalyseur scr - Google Patents

Procédé pour déterminer l'état de charge d'un catalyseur scr et système de catalyseur scr Download PDF

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Publication number
WO2019025129A1
WO2019025129A1 PCT/EP2018/068513 EP2018068513W WO2019025129A1 WO 2019025129 A1 WO2019025129 A1 WO 2019025129A1 EP 2018068513 W EP2018068513 W EP 2018068513W WO 2019025129 A1 WO2019025129 A1 WO 2019025129A1
Authority
WO
WIPO (PCT)
Prior art keywords
scr catalyst
exhaust gas
combustion engine
internal combustion
scr
Prior art date
Application number
PCT/EP2018/068513
Other languages
German (de)
English (en)
Inventor
Torsten Reitmeier
Sabrina KOLBECK
Marian DREHER
Original Assignee
Continental Automotive Gmbh
Ngk Europe Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Continental Automotive Gmbh, Ngk Europe Gmbh filed Critical Continental Automotive Gmbh
Priority to EP18739515.7A priority Critical patent/EP3662151A1/fr
Publication of WO2019025129A1 publication Critical patent/WO2019025129A1/fr

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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
    • F01N3/18—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
    • F01N3/20—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 specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • 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
    • F01N3/20—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 specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • 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
    • 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
    • F01N2560/021—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting ammonia NH3
    • 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
    • F01N2560/024—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting hydrogen H2
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0412—Methods of control or diagnosing using pre-calibrated maps, tables or charts
    • 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
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0416—Methods of control or diagnosing using the state of a sensor, e.g. of an exhaust gas sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1402—Exhaust gas composition
    • 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
    • F01N2900/1616—NH3-slip from catalyst
    • 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
    • F01N2900/1622—Catalyst reducing agent absorption capacity or consumption amount
    • 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 invention relates to a method for determining the loading state of an SCR catalyst, in particular a Ver ⁇ drive for determining the ammonia loading state of a arranged in an exhaust line of an internal combustion engine
  • SCR catalyst and an SCR catalytic converter device of an internal combustion engine.
  • SCR catalysts are used to convert the nitrogen oxides in the exhaust into non-toxic substances.
  • the nitrogen oxides can be converted into elemental nitrogen and water.
  • a suitable liquid such as urea (urea) is injected into the exhaust gas, which is converted via a pre-reaction to ammonia, which then serves as the reducing agent for the conversion of toxic nitrogen oxides into non-toxic substances.
  • the SCR Kataly ⁇ sator is adapted to the reducing agent, as for example ⁇ play, petition arrivedn ammonia, so that the reduction of the exhaust gas can take place. However, if the amount of ammonia loaded is within the
  • SCR catalyst is too high, an unintentional amount of ammonia can escape from the SCR catalyst during load changes and be discharged to the environment, which in turn results in harmful exhaust gases. Consequently, it is desirable to continuously detect and know the loading state of the SCR catalyst with ammonia. If the loading of the SCR catalytic converter is too low, the nitrogen oxides can break through. Consequently, it is desirable that the loading of the SCR catalyst with Ammonia is in a range between about 80% and about 90%.
  • the present invention has for its object to determine the loading state of an arranged in an exhaust line of an internal combustion engine SCR catalyst reliable and accurate as possible, and a corresponding
  • the present invention is essentially based on the finding that the hydrogen concentration in the exhaust gas downstream of the SCR catalyst is proportional to the loading state of the SCR catalyst. In particular, the water ⁇ concentration increases steadily with increasing load condition of the SCR catalyst.
  • a method for determining the loading state of an arranged in an exhaust line of an internal combustion engine SCR Kataly ⁇ sator which detects the hydrogen concentration in the exhaust gas of the internal combustion engine downstream of the SCR cata- ⁇ sators and determining the loading state of the SCR catalytic Sators has at least partially based on the detected hydrogen concentration ⁇ in the exhaust of the internal combustion engine.
  • a look-up table is provided which establishes a link between a hydrogen concentration of the downstream exhaust gas and a loading state of the SCR catalyst.
  • determining the loading state of the SCR catalyst is based at least in part on the look-up table provided.
  • the look-up table may be stored in advance in a controller of the SCR catalyst, and may be linked to the corresponding load state of the SCR catalyst upon detecting the corresponding hydrogen concentration value in the downstream exhaust gas.
  • SCR catalyst is then in turn based at least in part on the provided mathematical mapping.
  • the mathematical representation describes a mathematical function that takes into account other parameters of the exhaust gas in addition to the detected hydrogen concentration ⁇ , such as the temperature of the exhaust gas, the nitrogen oxide concentration of the exhaust gas and / or the ammonia concentration of the exhaust gas. From the mathematical mapping, a corresponding loading state of the SCR catalytic converter can thus be determined.
  • State of the SCR catalyst exceeds a predetermined Bela ⁇ tion threshold, and provided a disruption of a urea injection, when it has been determined that the loading state of the SCR catalyst exceeds the predetermined loading threshold.
  • SCR catalyst can be prevented with ammonia, so that the emission of toxic exhaust gas can be at least partially further reduced or even avoided.
  • an SCR catalytic converter device of an internal combustion engine which has an SCR catalytic converter, which is designed to at least partially emulate the exhaust gas of the internal combustion engine, and at least one sensor device arranged downstream of the SCR catalytic converter is designed to output a sensor indicating a hydrogen concentration in the exhaust gas of the internal combustion engine.
  • the SCR catalytic device further comprises a control unit which is adapted to carry out an inventive method for determining the loading state of the SCR Kataly ⁇ crystallizer.
  • the sensor device is a mixed potential sensor which is at least partially sensitive to hydrogen.
  • the sensor device is an ammonia sensor that is primarily sensitive to ammonia, but is at least partially cross-sensitive to hydrogen.
  • the sensor signal of the downstream of the SCR catalyst arranged ammonia sensor ⁇ indicates substantially the hydrogen concentration, since in such a loading state of the SCR catalyst substantially no ammonia in the exhaust gas is present.
  • Fig. 1 shows an inventive SCR catalytic converter device of an internal combustion engine
  • FIG. 2 is a flowchart of a method according to the invention for determining the loading state of a
  • FIG. 1 illustrates an exemplary SCR catalyst device 100 that may be employed in an exhaust line of an internal combustion engine (not shown) to convert nitrogen oxides in the exhaust into non-toxic materials.
  • the SCR catalyst device has an SCR catalyst 110, one upstream thereof .
  • urea injection device 112 which is adapted to inject a urea in the exhaust gas upstream of the SCR catalyst 110, which is then converted before and / or in the SCR catalyst 110 in ammonia (NH 3), which serves as a reducing agent for the Nitrogen oxides in the exhaust gas is used.
  • NH 3 ammonia
  • an upstream of the SCR catalyst 110 is ⁇ arranged oxidation catalyst, disposed between the urea injector 112 and the SCR catalyst 110 urea decomposition arrangement and a downstream the SCR catalyst 110 arranged Ammoniakvernichtungsan- order.
  • the hydrogen sensitive sensor device 120 is, for example, a mixed potential sensor having a mixed potential and / or a reference electrode.
  • the sensor device 120 is an ammonia sensor which is cross-sensitive to hydrogen and below its maximum loading in ⁇ We sentlichen experiences no ammonia in a loading condition of the SCR catalyst 110th
  • the SCR catalyst device 100 is further associated with a control unit 130 which communicates with the ammonia injection device 112 and the sensor device 120 in communication and is adapted to control the respective devices or to detect signals from these respective devices.
  • the control unit 130 is adapted to the sensor signal transmitted by the Sen ⁇ sorvoriques 120, a water Concentration in the exhaust gas downstream of the SCR catalyst 110 indicates to receive and this detected hydrogen concentration ⁇ a corresponding load state of the
  • Assign SCR catalyst 110 This mapping is done for example the one in the control unit 130.
  • the controller 130 may be configured to control the urea injector 112 to reduce or interrupt injection of urea into the exhaust gas upstream of the SCR catalyst 110.
  • the urea injector 112 may be configured to reduce or interrupt injection of urea into the exhaust gas upstream of the SCR catalyst 110.
  • an ammonia breakthrough of the SCR catalytic converter 110 can be detected in good time and avoided [please confirm or clarify].
  • FIG. 2 a method according to the invention according to the present invention is illustrated with reference to a flow chart.
  • the method begins at step 200 and at step 210 performs the detection of the hydrogen concentration in the exhaust downstream of the SCR catalyst 110, for example by means of the sensor device 120 (see FIG. 1).
  • the hydrogen concentration detected at step 210 is assigned a corresponding loading state of the SCR catalytic converter 110 before the method ends at step 230.
  • the charge state of an SCR catalytic converter 110 can be detected continuously and an early breakthrough of the SCR catalytic converter 110 can be counteracted.

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)
  • Exhaust Gas After Treatment (AREA)

Abstract

La présente invention concerne un procédé et un système de catalyseur SCR pour déterminer l'état de charge d'un catalyseur SCR (110) disposé dans une ligne d'échappement d'un moteur à combustion interne. Le procédé selon l'invention consiste à détecter la concentration en hydrogène dans les gaz d'échappement du moteur à combustion interne en aval du catalyseur SCR (110) et à déterminer l'état de charge du catalyseur SCR (110) au moins en partie d'après la concentration en hydrogène détectée dans les gaz d'échappement du moteur à combustion interne.
PCT/EP2018/068513 2017-08-04 2018-07-09 Procédé pour déterminer l'état de charge d'un catalyseur scr et système de catalyseur scr WO2019025129A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18739515.7A EP3662151A1 (fr) 2017-08-04 2018-07-09 Procédé pour déterminer l'état de charge d'un catalyseur scr et système de catalyseur scr

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017213594.8A DE102017213594B4 (de) 2017-08-04 2017-08-04 Verfahren zum Ermitteln des Beladungszustands eines SCR-Katalysators und SCR-Katalysatorvorrichtung
DE102017213594.8 2017-08-04

Publications (1)

Publication Number Publication Date
WO2019025129A1 true WO2019025129A1 (fr) 2019-02-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/068513 WO2019025129A1 (fr) 2017-08-04 2018-07-09 Procédé pour déterminer l'état de charge d'un catalyseur scr et système de catalyseur scr

Country Status (3)

Country Link
EP (1) EP3662151A1 (fr)
DE (1) DE102017213594B4 (fr)
WO (1) WO2019025129A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10358495A1 (de) 2003-12-13 2005-07-14 Daimlerchrysler Ag Verfahren zur Erkennung des Zustands eines Katalysators, insbesondere eines NOx-Speicherkatalysators
EP2149686A1 (fr) * 2007-05-16 2010-02-03 Isuzu Motors Limited Procédé de commande d'un système de purification de nox et système de purification de nox
DE102014202491A1 (de) * 2013-04-11 2014-10-16 Ford Global Technologies, Llc Diagnose eines Lean-NOx-Trap-Katalysators durch Messung einer Wasserstoffkonzentration
DE102016206462A1 (de) * 2016-04-18 2017-03-09 Continental Automotive Gmbh Verfahren zum Betreiben eines SCR-Katalysators einer Brennkraftmaschine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT516469B1 (de) * 2014-11-07 2018-06-15 Avl List Gmbh Verfahren zur gezielten generierung von nh3 während des regenerationsvorgangs eines nox-speicherkatalysators

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10358495A1 (de) 2003-12-13 2005-07-14 Daimlerchrysler Ag Verfahren zur Erkennung des Zustands eines Katalysators, insbesondere eines NOx-Speicherkatalysators
EP2149686A1 (fr) * 2007-05-16 2010-02-03 Isuzu Motors Limited Procédé de commande d'un système de purification de nox et système de purification de nox
DE102014202491A1 (de) * 2013-04-11 2014-10-16 Ford Global Technologies, Llc Diagnose eines Lean-NOx-Trap-Katalysators durch Messung einer Wasserstoffkonzentration
DE102016206462A1 (de) * 2016-04-18 2017-03-09 Continental Automotive Gmbh Verfahren zum Betreiben eines SCR-Katalysators einer Brennkraftmaschine

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Publication number Publication date
DE102017213594B4 (de) 2020-06-25
EP3662151A1 (fr) 2020-06-10
DE102017213594A1 (de) 2019-02-07

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