SE540087C2 - A system and a method for diagnosing the performance of two NOx sensors in an exhaust gas processing configuration comprising two SCR units - Google Patents

A system and a method for diagnosing the performance of two NOx sensors in an exhaust gas processing configuration comprising two SCR units Download PDF

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Publication number
SE540087C2
SE540087C2 SE1651061A SE1651061A SE540087C2 SE 540087 C2 SE540087 C2 SE 540087C2 SE 1651061 A SE1651061 A SE 1651061A SE 1651061 A SE1651061 A SE 1651061A SE 540087 C2 SE540087 C2 SE 540087C2
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Prior art keywords
nox
sensor
unit
scr
reducing agent
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SE1651061A
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English (en)
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SE1651061A1 (sv
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Sommansson Joakim
Strååt Fredrik
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Scania Cv Ab
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Priority to SE1651061A priority Critical patent/SE540087C2/sv
Priority to CN201780042435.4A priority patent/CN109415962B/zh
Priority to BR112018075697-0A priority patent/BR112018075697B1/pt
Priority to KR1020197002608A priority patent/KR20190021436A/ko
Priority to US16/316,304 priority patent/US11174810B2/en
Priority to EP17828063.2A priority patent/EP3485151A4/en
Priority to PCT/SE2017/050756 priority patent/WO2018013039A1/en
Publication of SE1651061A1 publication Critical patent/SE1651061A1/sv
Publication of SE540087C2 publication Critical patent/SE540087C2/sv

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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
    • 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
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9495—Controlling the catalytic process
    • 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
    • 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
    • F01N3/20—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]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2067—Urea
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/01—Engine exhaust gases
    • B01D2258/012—Diesel engines and lean burn gasoline engines
    • 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
    • F01N2550/05—Systems for adding substances 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
    • F01N2560/026—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
    • 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
    • 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
    • F01N2570/14—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
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives
    • 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
    • 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
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    • 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
    • F01N2900/0422—Methods of control or diagnosing measuring the elapsed time
    • 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
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    • 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
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/108—Auxiliary reduction catalysts
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
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  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)

Claims (16)

1. Förfarande för diagnos av en konfiguration för avgasbehandling för en förbränningsmotor(231) i ett fordon (100), varvid nämnda konfiguration innefattar en första SCR-enhet (240)och en första NOX-sensor (243) som anordnats nedströms om nämnda första SCR-enhet(240) samt en andra SCR-enhet (250) och en andra NOX-sensor (253) som anordnatsnedströms om nämnda andra SCR-enhet (250), och en första enhet (237) för dosering avreduktionsmedel, vilken anordnats uppströms om nämnda första SCR-enhet (240) samt enandra enhet (247) för dosering av reduktionsmedel, vilken anordnats mellan nämnda förstaSCR-enhet (240) och nämnda andra SCR-enhet (250), varvid förfarandet innefattar följande steg: - att fastställa huruvida en i förväg fastställd status hos nämnda konfiguration för avgasbehandling föreligger, och om så är fallet; - att genomföra en serie doseringsoperationer med reduktionsmedel genom nämnda första enhet (237) för dosering av reduktionsmedel; - att fastställa en mängd för NOX-halt(NOx1, NOx2), uppmätt genom nämnda första NOX-sensor (243) och nämnda andra NOX-sensor (253), för ett antal av nämnda doseringsoperationer med reduktionsmedel; - att jämföra nämnda NOX-halt(NOx1, NOx2), uppmätt genom nämnda första NOX-sensor (243) och nämnda andra NOX-sensor (253); och - om den respektive NOX-halten (NOxl, NOx2) som uppmätts av de respektive NOX-sensorerna (243, 253) under de doseringsoperationer med reduktionsmedel som utförts ärhuvudsakligen likadan, att anse att de respektive NOX-sensorerna (243, 253) tillhandahåller en korrekt prestanda.
2. Förfarande enligt patentkrav 1, varvid, om den respektive NOX-halt(NOx1, NOx2) somuppmätts av de respektive NOX-sensorerna (243, 253) under de doseringsoperationer medreduktionsmedel som utförts inte är huvudsakligen likadan, förfarandet vidare innefattar följande steg: 26 - att fastställa om en av nämnda NOX-sensorer uppvisar en icke-linjär prestanda avseende dedoseringsoperationer med reduktionsmedel som utförts och den NOX-halt som uppmätts avden andra NOX-sensorn gällande de doseringsoperationer med reduktionsmedel som utförts, och - att fastställa om det föreligger en ammoniakutsöndring vid nämnda ena NOX-sensor, och om så är fallet, - att anse att båda NOX-sensorerna tillhandahåller en korrekt prestanda.
3. Förfarande enligt patentkrav 2, varvid, om ingen ammoniakutsöndring fastställs föreligga vid nämnda ena NOX-sensor, förfarandet vidare innefattar följande steg: - att fastställa om ett förskjutningsfel är associerat med nämnda ena NOX-sensor.
4. Förfarande enligt patentkrav 3, varvid, om det fastställs att inget förskjutningsfel är associerat med nämnda ena NOX-sensor, förfarandet vidare innefattar följande steg: - att anse att nämnda ena NOX-sensor inte tillhandahåller en korrekt prestanda.
5. Förfarande enligt patentkrav 3, varvid, om det fastställs att ett förskjutningsfel ärassocierat med nämnda ena NOX-sensor, och en tidigare time-out avseendedoseringsoperationer med reduktionsmedel har genomförts för nämnda ena NOX-sensor, förfarandet vidare innefattar följande steg: - att anse att nämnda ena NOX-sensor inte tillhandahåller en korrekt prestanda.
6. Förfarande enligt patentkrav 3, varvid, om det fastställs att ett förskjutningsfel ärassocierat med nämnda ena NOX-sensor och en tidigare time-out avseendedoseringsoperationer med reduktionsmedel inte har genomförts för nämnda ena NOX- sensor, förfarandet vidare innefattar följande steg: 27 - att utföra en time-out avseende doseringsoperationer med reduktionsmedel för nämnda ena NOX-sensor.
7. System för diagnos av en konfiguration för avgasbehandling för en förbränningsmotor(231) i ett fordon (100), varvid nämnda konfiguration innefattar en första SCR-enhet (240)och en första NOX-sensor (243) som anordnats nedströms om nämnda första SCR-enhet(240) samt en andra SCR-enhet (250) och en andra NOX-sensor (253) som anordnatsnedströms om nämnda andra SCR-enhet (250), och en första enhet (237) för dosering avreduktionsmedel, vilken anordnats uppströms om nämnda första SCR-enhet (240) samt enandra enhet (247) för dosering av reduktionsmedel, vilken anordnats mellan nämnda första SCR-enhet (240) och nämnda andra SCR-enhet (250), varvid systemet innefattar: - medel (200; 210; 500) som anordnats för att fastställa huruvida en i förväg fastställd status hos nämnda konfiguration för avgasbehandling föreligger; - medel (200; 210; 500) som anordnats för att genomföra en serie doseringsoperationer med reduktionsmedel genom nämnda första enhet (237) för dosering av reduktionsmedel; - medel (200; 210; 500) som anordnats för att fastställa en mängd för NOX-halt (NOx1,NOx2), uppmätt genom nämnda första NOX-sensor (243) och nämnda andra NOX-sensor (253), för ett antal av nämnda doseringsoperationer med reduktionsmedel; - medel (200; 210; 500) som anordnats för attjämföra nämnda NOX-halt (NOx1, NOx2), uppmätt genom nämnda första NOX-sensor (243) och nämnda andra NOX-sensor (253); och - medel (200; 210; 500) som anordnats för att anse att de respektive NOX-sensorernatillhandahåller en korrekt prestanda om den respektive NOX-halt som uppmätts av derespektive NOX-sensorerna under de doseringsoperationer med reduktionsmedel som utförts är huvudsakligen likadan.
8. System enligt patentkrav 7, vidare innefattande: 28 - medel (200; 210; 500) som anordnats för att fastställa om en av nämnda NOX-sensoreruppvisar en icke-linjär prestanda avseende de doseringsoperationer med reduktionsmedelsom utförts och den NOX-halt som uppmätts av den andra NOX-sensorn gällande de doseringsoperationer med reduktionsmedel som utförts; - medel (200; 210; 500) som anordnats för att fastställa om det föreligger en ammoniakutsöndring vid nämnda ena NOX-sensor; och - medel (200; 210; 500) som anordnats för att anse att båda NOX-sensorerna tillhandahåller en korrekt prestanda om det föreligger en ammoniakutsöndring vid nämnda ena NOX-sensor.
9. System enligt patentkrav 8, vidare innefattande: - medel (200; 210; 500) som anordnats för att fastställa om ett förskjutningsfel är associerat med nämnda ena NOX-sensor.
10. System enligt patentkrav 9, vidare innefattande: - medel (200; 210; 500) som anordnats för att anse att nämnda ena NOX-sensor intetillhandahåller en korrekt prestanda om det fastställs att inget förskjutningsfel är associerat med nämnda ena NOX-sensor.
11. System enligt patentkrav 9, vidare innefattande, - medel (200; 210; 500) som har anordnats för att anse att nämnda ena NOX-sensor intetillhandahåller en korrekt prestanda om det fastställs att ett förskjutningsfel är associeratmed nämnda ena NOX-sensor och en tidigare time-out avseende doseringsoperationer med reduktionsmedel har genomförts för nämnda ena NOX-sensor.
12. System enligt patentkrav 9, vidare innefattande: 29 - medel (200; 210; 500) som har anordnats för att utföra en time-out avseendedoseringsoperationer med reduktionsmedel för nämnda ena NOX-sensor, om det fastställsatt ett förskjutningsfel är associerat med nämnda ena NOX-sensor och en tidigare time-outavseende doseringsoperationer med reduktionsmedel inte har genomförts för nämnda ena NOX-sensor.
13. Fordon (100; 110) innefattande ett system enligt något av patentkraven 7-12.
14. Fordon (100; 110) enligt patentkrav 13, vilket fordon är endera av en lastbil, en buss eller en personbil.
15. Datorprogram (P) för diagnos av en konfiguration för avgasbehandling för enförbränningsmotor i ett fordon, varvid nämnda datorprogram (P) innefattar programkod föratt orsaka ett en elektronisk styrenhet (200; 500) eller en dator (210; 500) som är kopplad till nämnda elektroniska styrenhet (200; 500) utför stegen enligt något av patentkraven 1-6.
16. Datorprogramprodukt innefattande en programkod som lagrats på ett datorläsbartmedium, för utförande av förfarandesteg enligt något av patentkraven 1-6, när nämndadatorprogram körs på en elektronisk styrenhet (200; 500) eller på en dator (210; 500) ansluten till den elektroniska styrenheten (200; 500).
SE1651061A 2016-07-14 2016-07-14 A system and a method for diagnosing the performance of two NOx sensors in an exhaust gas processing configuration comprising two SCR units SE540087C2 (sv)

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SE1651061A SE540087C2 (sv) 2016-07-14 2016-07-14 A system and a method for diagnosing the performance of two NOx sensors in an exhaust gas processing configuration comprising two SCR units
CN201780042435.4A CN109415962B (zh) 2016-07-14 2017-07-06 用于诊断排气处理构造的系统和方法
BR112018075697-0A BR112018075697B1 (pt) 2016-07-14 2017-07-06 Sistema e método para diagnosticar o desempenho de dois sensores de nox em uma configuração de processamento de gás de exaustão compreendendo duas unidades scr e veículo
KR1020197002608A KR20190021436A (ko) 2016-07-14 2017-07-06 2개의 scr 유닛을 포함하는 배기가스 처리 장치 내의 2개의 nox 센서의 성능을 진단하는 방법 및 시스템
US16/316,304 US11174810B2 (en) 2016-07-14 2017-07-06 System and a method for diagnosing the performance of two NOX sensors in an exhaust gas processing configuration comprising two SCR units
EP17828063.2A EP3485151A4 (en) 2016-07-14 2017-07-06 SYSTEM AND METHOD FOR PERFORMANCE DIAGNOSIS OF TWO NOX SENSORS IN AN EXHAUST GAS PROCESSING ARRANGEMENT WITH TWO SCR UNITS
PCT/SE2017/050756 WO2018013039A1 (en) 2016-07-14 2017-07-06 A system and a method for diagnosing the performance of two nox sensors in an exhaust gas processing configuration comprising two scr units

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