DE102014204327A1 - Method and apparatus for checking the failure or presence of components in an exhaust system - Google Patents
Method and apparatus for checking the failure or presence of components in an exhaust system Download PDFInfo
- Publication number
- DE102014204327A1 DE102014204327A1 DE102014204327.1A DE102014204327A DE102014204327A1 DE 102014204327 A1 DE102014204327 A1 DE 102014204327A1 DE 102014204327 A DE102014204327 A DE 102014204327A DE 102014204327 A1 DE102014204327 A1 DE 102014204327A1
- Authority
- DE
- Germany
- Prior art keywords
- exhaust system
- particulate filter
- diesel particulate
- scr catalyst
- failure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 238000010531 catalytic reduction reaction Methods 0.000 claims abstract description 7
- 239000003054 catalyst Substances 0.000 claims description 58
- 238000011144 upstream manufacturing Methods 0.000 claims description 21
- 238000005259 measurement Methods 0.000 claims description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 22
- 230000003197 catalytic effect Effects 0.000 abstract description 17
- 239000007789 gas Substances 0.000 abstract description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Images
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
- 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
- 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
- F01N13/0097—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 arranged in a single housing
-
- 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
-
- 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
- F01N2550/04—Filtering activity of particulate filters
-
- 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
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature 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
- 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
- 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
- F01N2900/0601—Parameters used for exhaust control or diagnosing being estimated
-
- 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
- F01N2900/1404—Exhaust gas temperature
-
- 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
- F01N2900/1602—Temperature of exhaust gas 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
- F01N2900/06—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
- F01N2900/1606—Particle filter loading or soot amount
-
- 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
- F01N2900/1621—Catalyst conversion efficiency
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—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
- F01N3/106—Auxiliary oxidation 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
- 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]
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zum Überprüfen des Ausfalls bzw. Vorhandenseins von Komponenten in einem Abgassystem. Bei einem Verfahren zum Überprüfen des Ausfalls bzw. Vorhandenseins von Komponenten in einem Abgassystem eines Dieselmotors, wobei das Abgassystem einen Dieselpartikelfilter (13, 23) und einen stromabwärts hiervon angeordneten SCR-Katalysator (14, 24) zur selektiven katalytischen Reduktion von im dem SCR-Katalysator (14, 24) zugeführten Abgas enthaltenen Stickoxiden aufweist, erfolgt das Überprüfen des Ausfalls bzw. Vorhandenseins von wenigstens einer der beiden Komponenten Dieselpartikelfilter (13, 23) und SCR-Katalysator (14, 24) im Abgassystem auf Basis einer Überwachung des thermischen Verhaltens des Abgassystems nach einem Anstieg der Abgastemperatur, wobei eine Mehrzahl von Kennwerten (E1, E2, E3, E4) basierend auf gemessenen und geschätzten Temperaturwerten entlang des Abgassystems ermittelt und jeweils mit einem vorgegebenen Schwellenwert verglichen werden. Hierbei wird auf Basis der Überwachung des thermischen Verhaltens des Abgassystems bestimmt, ob von den Komponenten Dieselpartikelfilter (13, 23) und SCR-Katalysator (14, 24) nur der Dieselpartikelfilter, nur der SCR-Katalysator, sowohl der Dieselpartikelfilter als auch der Katalysator oder weder Dieselpartikelfilter noch SCR-Katalysator betriebsbereit sind.The present invention relates to a method and a device for checking the failure or presence of components in an exhaust system. In a method for checking the failure or presence of components in an exhaust system of a diesel engine, the exhaust system having a diesel particulate filter (13, 23) and an SCR catalytic converter (14, 24) arranged downstream thereof for the selective catalytic reduction of in the SCR Catalytic converter (14, 24) contains nitrogen oxides, the failure or presence of at least one of the two components diesel particulate filter (13, 23) and SCR catalytic converter (14, 24) in the exhaust system is checked on the basis of a monitoring of the thermal behavior of the exhaust system after an increase in exhaust gas temperature, a plurality of characteristic values (E1, E2, E3, E4) being determined based on measured and estimated temperature values along the exhaust system and each being compared with a predetermined threshold value. On the basis of the monitoring of the thermal behavior of the exhaust system, it is determined whether of the diesel particulate filter (13, 23) and SCR catalytic converter (14, 24) only the diesel particulate filter, only the SCR catalytic converter, both the diesel particulate filter and the catalytic converter or neither the diesel particulate filter nor the SCR catalytic converter are operational.
Description
Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zum Überprüfen des Ausfalls bzw. den Nachweis des Vorhandenseins von Komponenten in einem Abgassystem. Insbesondere betrifft die Erfindung ein Verfahren und eine Vorrichtung, welche in einem Abgassystem eines Dieselmotors die Überprüfung des Ausfalls bzw. den Nachweis der Entfernung von einer der Komponenten Dieselpartikelfilter und SCR-Katalysator oder von diesen beiden Komponenten ermöglichen. The present invention relates to a method and apparatus for verifying the failure or presence of components in an exhaust system. In particular, the invention relates to a method and a device which allow in an exhaust system of a diesel engine, the verification of the failure or the detection of the removal of one of the components diesel particulate filter and SCR catalyst or of these two components.
Die Einführung von immer strengeren NOx-Grenzwerten hat zur Entwicklung diverser Abgasnachbehandlungstechnologien geführt, um eine Kontrolle der NOx-Emissionen (= Stickoxid-Emissionen) im Abgas eines Dieselmotors zu erzielen. Eine dieser Lösungen ist der sogenannte NOx-Speicherkatalysator (LNT = "Lean NOx Trap"), dessen Funktionsprinzip darauf beruht, Stickoxide (NOx) unter mageren Abgasbedingungen zunächst zu speichern und dann unter Einstellung eines fetten, reduzierenden Abgasgemischs in einer Regenerationsphase umzuwandeln. Eine zweite Technologie ist die selektive katalytische Reduktion in einem sogenannten SCR-Katalysator (SCR = "Selective Catalytic Reduction" = "selektive katalytische Reduktion"), wobei am SCR-Katalysator mittels Ammoniak (NH3) die im Abgas enthaltenen Stickoxide (NOx) zu Stickstoff (N2) reduziert werden. The introduction of increasingly stringent NO x limits has led to the development of a variety of exhaust aftertreatment technologies to control NO x emissions (= nitrogen oxide emissions) in the exhaust of a diesel engine. One of these solutions is the so-called NO x trap (LNT = "Lean NOx Trap"), whose operating principle is based on nitrogen oxides (NOx) under lean exhaust conditions to first save, and then setting a rich, reducing exhaust gas mixture converted in a regeneration phase, , A second technology is the selective catalytic reduction in a so-called SCR catalyst (SCR = "Selective Catalytic Reduction" = "selective catalytic reduction"), wherein the nitrogen oxides (NO x ) contained in the exhaust gas at the SCR catalyst by means of ammonia (NH 3 ). reduced to nitrogen (N 2 ).
Die gesetzlichen Rahmenbedingungen sehen für derartige Abgasbehandlungseinrichtungen eine kontinuierliche Selbstdiagnosefunktion vor, die bei einem Ausfall bzw. auch – im Extremfall – einer mutwilligen Entfernung von Komponenten (z. B. um bei einem Defekt eine Austauschkomponente zu sparen) den Fahrer des Fahrzeugs benachrichtigt und ggf. weitere Maßnahmen veranlasst. Der hard- und softwareseitige Aufwand für eine derartige Überwachung der Abgasbehandlungseinrichtung auf Integrität soll naturgemäß möglichst gering gehalten werden.The legal framework provides for such exhaust gas treatment facilities a continuous self-diagnostic function, which notifies the driver of the vehicle in the event of a failure or, in the extreme case, a wanton removal of components (eg in order to save an exchange component in the case of a defect). initiates further action. The hardware and software expense for such monitoring of the exhaust gas treatment device on integrity should naturally be kept as low as possible.
Zum Stand der Technik wird lediglich beispielhaft auf
Es ist eine Aufgabe der vorliegenden Erfindung, ein Verfahren und eine Vorrichtung zum Überprüfen des Ausfalls bzw. des Vorhandenseins von Komponenten eines Abgassystems eines Dieselmotors bereitzustellen, welche die Überprüfung des Ausfalls (bzw. den Nachweis der Entfernung) von einer der Komponenten Dieselpartikelfilter und SCR-Katalysator oder von diesen beiden Komponenten im Abgassystem unter Einsatz einer möglichst niedrigen Anzahl von Sensoren sowie mit möglichst geringem Kostenaufwand ermöglichen.It is an object of the present invention to provide a method and apparatus for verifying the failure or presence of components of an exhaust system of a diesel engine, which includes verifying the failure (or evidence of removal) of one of the diesel particulate filter and SCR component components. Allow catalyst or of these two components in the exhaust system using as low a number of sensors as possible and with the least possible cost.
Diese Aufgabe wird durch das Verfahren gemäß den Merkmalen des unabhängigen Patentanspruchs 1 sowie die Vorrichtung gemäß den Merkmalen des nebengeordneten Patentanspruchs 9 gelöst.This object is achieved by the method according to the features of the independent patent claim 1 and the device according to the features of the independent claim 9.
Bei einem erfindungsgemäßen Verfahren zum Überprüfen des Ausfalls bzw. des Vorhandenseins von Komponenten in einem Abgassystem eines Dieselmotors, wobei das Abgassystem einen Dieselpartikelfilter und einen stromabwärts hiervon angeordneten SCR-Katalysator zur selektiven katalytischen Reduktion von im dem SCR-Katalysator zugeführten Abgas enthaltenen Stickoxiden aufweist, erfolgt das Überprüfen des Ausfalls bzw. des Vorhandenseins von wenigstens einer der beiden Komponenten Dieselpartikelfilter und SCR-Katalysator im Abgassystem auf Basis einer Überwachung des thermischen Verhaltens des Abgassystems nach einem Anstieg der Abgastemperatur, wobei eine Mehrzahl von Kennwerten basierend auf gemessenen und geschätzten Temperaturwerten entlang des Abgassystems ermittelt und jeweils mit einem vorgegebenen Schwellenwert verglichen werden, wobei auf Basis dieser Überwachung des thermischen Verhaltens des Abgassystems bestimmt wird, ob von den Komponenten Dieselpartikelfilter und SCR-Katalysator nur der Dieselpartikelfilter, nur der SCR-Katalysator, sowohl der Dieselpartikelfilter als auch der Katalysator oder weder Dieselpartikelfilter noch SCR-Katalysator betriebsbereit sind.In a method according to the invention for checking the failure or presence of components in an exhaust system of a diesel engine, the exhaust system having a diesel particulate filter and an SCR catalyst arranged downstream thereof for selective catalytic reduction of nitrogen oxides contained in the exhaust gas supplied to the SCR catalyst checking the failure of at least one of the diesel particulate filter and SCR catalyst in the exhaust system based on monitoring the thermal behavior of the exhaust system after an increase in exhaust temperature, wherein a plurality of characteristics based on measured and estimated temperature values along the exhaust system determined and compared in each case with a predetermined threshold value, it being determined on the basis of this monitoring of the thermal behavior of the exhaust system, whether of the components diesel particulate filter and SCR-K Only the diesel particulate filter, only the SCR catalytic converter, both the diesel particulate filter and the catalytic converter or neither diesel particulate filter nor SCR catalytic converter are ready for operation.
Der Erfindung liegt insbesondere das Konzept zugrunde, nach einem Anstieg der Abgastemperatur das thermische Verhalten des Abgassystems zu überwachen und basierend auf entlang der Abgasleitung gemessenen Temperaturwerten sowie geschätzten Temperaturwerten insgesamt vier Kennwerte (E1–E4) zu ermitteln, auf Basis derer auf das Fehlen oder den Ausfall der Komponenten Dieselpartikelfilter (DPF) und SCR-Katalysator im Abgassystem geschlossen wird.The invention is based in particular on the concept of monitoring the thermal behavior of the exhaust system after an increase in the exhaust gas temperature and determining four characteristic values (E 1 -E 4 ) based on temperature values measured along the exhaust pipe and estimated temperature values, based on the absence thereof or the failure of the components diesel particulate filter (DPF) and SCR catalytic converter in the exhaust system is closed.
Die Erfindung beinhaltet dabei weiter das Konzept, dass in dem Abgassystem mit Dieselpartikelfilter und stromabwärts hiervon angeordnetem SCR-Katalysator auf Basis der Überwachung des thermischen Verhaltens bestimmt wird, ob von den Komponenten Dieselpartikelfilter und SCR-Katalysator nur der Dieselpartikelfilter, nur der SCR-Katalysator, sowohl der Dieselpartikelfilter als auch der Katalysator oder weder Dieselpartikelfilter noch SCR-Katalysator betriebsbereit sind. Mit anderen Worten wird durch die Erfindung nicht nur die Überprüfung des Vorhandenseins bzw. der Funktionsfähigkeit lediglich einer Abgasnachbehandlungskomponente im Abgassystem realisiert, sondern es wird in dem Abgassystem mit Dieselpartikelfilter und stromabwärts hiervon angeordnetem SCR-Katalysator aufgrund der ermittelten Kennwerte unmittelbar und mit möglichst niedriger Anzahl von Sensoren sowie möglichst geringem Kostenaufwand entschieden, ob und ggf. welche der betreffenden Abgasnachbehandlungskomponente einen Defekt aufweist bzw. entfernt wurde.The invention further includes the concept that in the exhaust system with diesel particulate filter and downstream arranged SCR catalyst based on the monitoring of the thermal behavior is determined whether of the components diesel particulate filter and SCR catalyst only the diesel particulate filter, only the SCR catalyst, both the diesel particulate filter and the catalyst or neither Diesel particulate filter nor SCR catalytic converter are ready. In other words, the invention not only realizes the verification of the presence or operability of only an exhaust aftertreatment component in the exhaust system, but it is in the exhaust system with diesel particulate filter and downstream thereof arranged SCR catalyst due to the determined characteristics directly and with the lowest possible number of Sensors and lowest possible cost decided whether and, if so, which of the exhaust aftertreatment component concerned has a defect or has been removed.
Gemäß einer Ausführungsform entspricht jeder der basierend auf gemessenen und geschätzten Temperaturwerten entlang des Abgassystems ermittelten Kennwerte einem Differenzwert von jeweils zwei der gemessenen bzw. geschätzten Temperaturwerte.According to one embodiment, each of the characteristic values determined along the exhaust gas system based on measured and estimated temperature values corresponds to a difference value of two of the measured or estimated temperature values.
Gemäß einer Ausführungsform erfolgt das Überprüfen des Ausfalls oder des Vorhandenseins von wenigstens einer der beiden Komponenten Dieselpartikelfilter und SCR-Katalysator im Abgassystem ferner auf Basis der Messung eines Druckwertes stromaufwärts des Dieselpartikelfilters und einem Vergleich dieses Druckwertes mit einem vorgegebenen Schwellenwert.According to one embodiment, checking the failure or presence of at least one of the two components diesel particulate filter and SCR catalyst in the exhaust system is further based on measuring a pressure value upstream of the diesel particulate filter and comparing this pressure value with a predetermined threshold.
Gemäß einer Ausführungsform umfassen die gemessenen Temperaturwerte entlang des Abgassystems einen Temperaturwert stromabwärts des SCR-Katalysators sowie einen Temperaturwert stromaufwärts des Dieselpartikelfilters.In one embodiment, the measured temperature values along the exhaust system include a temperature value downstream of the SCR catalyst and a temperature value upstream of the diesel particulate filter.
Gemäß einer Ausführungsform umfassen die geschätzten Temperaturwerte entlang des Abgassystems einen Temperaturwert stromabwärts des SCR-Katalysators sowie einen Temperaturwert stromaufwärts des Dieselpartikelfilters.According to one embodiment, the estimated temperature values along the exhaust system include a temperature value downstream of the SCR catalyst and a temperature value upstream of the diesel particulate filter.
Gemäß einer Ausführungsform wird eine Korrelation des stromaufwärts des Dieselpartikelfilters gemessenen Temperaturwertes und des stromabwärts des SCR-Katalysators gemessenen Temperaturwertes zur Überprüfung verwendet, ob eine Situation ohne betriebsfähigen Dieselpartikelfilter und ohne betriebsfähigen SCR-Katalysator im Abgassystem vorliegt.According to one embodiment, a correlation of the temperature value measured upstream of the diesel particulate filter and the temperature value measured downstream of the SCR catalyst is used to check whether there is a situation without an operable diesel particulate filter and without an operable SCR catalyst in the exhaust system.
Die Erfindung betrifft weiter eine Vorrichtung zum Überprüfen des Ausfalls bzw. des Vorhandenseins von Komponenten in einem Abgassystem eines Dieselmotors, wobei die Vorrichtung dazu konfiguriert ist, ein Verfahren mit den vorstehend beschriebenen Merkmalen auszuführen.The invention further relates to an apparatus for checking the failure or presence of components in an exhaust system of a diesel engine, the apparatus being configured to carry out a method having the features described above.
Weitere Ausgestaltungen der Erfindung sind der Beschreibung sowie den Unteransprüchen zu entnehmen.Further embodiments of the invention are described in the description and the dependent claims.
Die Erfindung wird nachstehend anhand bevorzugter Ausführungsformen unter Bezugnahme auf die beigefügten Abbildungen erläutert. The invention will be explained below with reference to preferred embodiments with reference to the accompanying drawings.
Es zeigen:Show it:
Des Weiteren weist der Aufbau gemäß
Mit "18" ist ein Drucksensor bezeichnet, wobei der am Ort dieses Drucksensors
Das erfindungsgemäße Verfahren zur Ermittlung des Ausfalls bzw. "Fehlens" von einer der Komponenten Dieselpartikelfilter (DPF)
Wie im Folgenden näher erläutert, werden nun basierend auf gemessenen bzw. geschätzten Temperaturwerten entlang der Abgasleitung insgesamt vier Kennwerte E1, E2, E3 und E4 ermittelt, anhand derer auf den Ausfall oder das "Fehlen" einer der Komponenten Dieselpartikelfilter (DPF)
Diese Kennwerte sind wie folgt definiert:
Die Auswertung dieser vier Kennwerte E1, E2, E3 und E4 wird im Folgenden unter Bezugnahme auf Tabelle 1 näher erläutert. Tabelle 1:
Die Temperatur T2,mess stromaufwärts des Dieselpartikelfilters (DPF)
Die Korrelation der mittels der Temperatursensoren
Hingegen ergibt sich für Fall Nr. 2, dass sowohl Dieselpartikelfilter (DPF)
Für Fall
Zur Überprüfung, ob gemäß Fall
Gemäß
Unter Bezugnahme auf
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102004052655 A1 [0004] DE 102004052655 A1 [0004]
- US 2011/0143449 A1 [0004] US 2011/0143449 A1 [0004]
- WO 2010/063972 A1 [0004] WO 2010/063972 A1 [0004]
- US 2010/0162691 A1 [0004] US 2010/0162691 A1 [0004]
- US 2009/0210129 A1 [0004] US 2009/0210129 A1 [0004]
- DE 102009003091 A1 [0004] DE 102009003091 A1 [0004]
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014204327.1A DE102014204327B4 (en) | 2013-03-20 | 2014-03-10 | Method and apparatus for checking the failure or presence of components in an exhaust system |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013204900 | 2013-03-20 | ||
DE102013204900.5 | 2013-03-20 | ||
DE102014204327.1A DE102014204327B4 (en) | 2013-03-20 | 2014-03-10 | Method and apparatus for checking the failure or presence of components in an exhaust system |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102014204327A1 true DE102014204327A1 (en) | 2014-09-25 |
DE102014204327B4 DE102014204327B4 (en) | 2016-11-03 |
Family
ID=51484868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102014204327.1A Active DE102014204327B4 (en) | 2013-03-20 | 2014-03-10 | Method and apparatus for checking the failure or presence of components in an exhaust system |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102014204327B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113702055A (en) * | 2021-08-10 | 2021-11-26 | 一汽解放汽车有限公司 | Diesel engine fault monitoring method and device, computer equipment and storage medium |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004052655A1 (en) | 2003-11-03 | 2005-05-25 | Ford Global Technologies, LLC, Dearborn | Pressure monitor for a diesel particulate filter |
US20090210129A1 (en) | 2005-05-31 | 2009-08-20 | Renault S.A.S. | Method and device for detecting the presence of an exhaust gas treatment system in an exhaust line of an internal combustion engine |
WO2010063972A1 (en) | 2008-12-04 | 2010-06-10 | Renault S.A.S. | Method and device for diagnosing the operating state of a particulate filter |
US20100162691A1 (en) | 2005-04-14 | 2010-07-01 | Volvo Lastvagnar Ab | Method of diagnosing the presence of an exhaust after-treatment component and a use of the method for vehicle on-board diagnosis |
DE102009003091A1 (en) | 2009-05-14 | 2010-11-18 | Robert Bosch Gmbh | Method and device for monitoring a arranged in an exhaust region of an internal combustion engine component |
US20110143449A1 (en) | 2009-12-10 | 2011-06-16 | Cummins Ip, Inc. | Apparatus, system, and method for catalyst presence detection |
-
2014
- 2014-03-10 DE DE102014204327.1A patent/DE102014204327B4/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004052655A1 (en) | 2003-11-03 | 2005-05-25 | Ford Global Technologies, LLC, Dearborn | Pressure monitor for a diesel particulate filter |
US20100162691A1 (en) | 2005-04-14 | 2010-07-01 | Volvo Lastvagnar Ab | Method of diagnosing the presence of an exhaust after-treatment component and a use of the method for vehicle on-board diagnosis |
US20090210129A1 (en) | 2005-05-31 | 2009-08-20 | Renault S.A.S. | Method and device for detecting the presence of an exhaust gas treatment system in an exhaust line of an internal combustion engine |
WO2010063972A1 (en) | 2008-12-04 | 2010-06-10 | Renault S.A.S. | Method and device for diagnosing the operating state of a particulate filter |
DE102009003091A1 (en) | 2009-05-14 | 2010-11-18 | Robert Bosch Gmbh | Method and device for monitoring a arranged in an exhaust region of an internal combustion engine component |
US20110143449A1 (en) | 2009-12-10 | 2011-06-16 | Cummins Ip, Inc. | Apparatus, system, and method for catalyst presence detection |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113702055A (en) * | 2021-08-10 | 2021-11-26 | 一汽解放汽车有限公司 | Diesel engine fault monitoring method and device, computer equipment and storage medium |
CN113702055B (en) * | 2021-08-10 | 2023-10-20 | 一汽解放汽车有限公司 | Diesel engine fault monitoring method, device, computer equipment and storage medium |
Also Published As
Publication number | Publication date |
---|---|
DE102014204327B4 (en) | 2016-11-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102014209840A1 (en) | Method and device for diagnosing a particulate filter | |
DE102014209960B4 (en) | Method and device for evaluating the functionality of an SCR catalytic converter in an exhaust system of a diesel engine | |
DE102013203495A1 (en) | Method and device for monitoring a nitrogen oxide storage catalytic converter | |
DE102013203580A1 (en) | Method for monitoring an exhaust aftertreatment system | |
EP1561019A1 (en) | Method for testing at least three sensors, which detect a measurable variable for an internal combustion engine | |
EP1373693A1 (en) | Method and device for monitoring an exhaust gas treatment system | |
EP1426575A1 (en) | Method and apparatus for monitoring an exhaust gas after-treatment system | |
WO2018177897A1 (en) | Method and computer program product for diagnosing a particle filter | |
DE102014209794A1 (en) | Method and device for the diagnosis of a removal of a component of an emission control system | |
DE102018213379A1 (en) | Method for monitoring an SCR catalytic converter | |
DE102011000153A1 (en) | Method for the diagnosis of exhaust gas aftertreatment | |
DE102008000691A1 (en) | Method and device for monitoring a supply air system of an internal combustion engine | |
DE102010002691A1 (en) | Method and device for diagnosing a particulate filter | |
DE10039952C2 (en) | Procedure for checking an exhaust gas recirculation system | |
DE102016200155A1 (en) | Method for monitoring an exhaust aftertreatment system of an internal combustion engine and control device for an exhaust aftertreatment system | |
DE102017201393A1 (en) | Method for fault detection in an SCR system by means of ammonia slip | |
DE102011089503A1 (en) | Diagnostic procedure for particulate filter arranged in effluent stream of combustion engine, involves comparing detected particle mass concentration with selected particle mass concentration threshold value | |
DE102014016347A1 (en) | A method of determining soot loading of a particulate filter provided with a selectively catalytic coating | |
DE102016200158A1 (en) | Method for monitoring an exhaust aftertreatment system of an internal combustion engine and control device for an exhaust aftertreatment system | |
EP0652358A2 (en) | Method for examination of the functioning capacity of lambda probes | |
DE102015200751B4 (en) | Method for monitoring an exhaust gas aftertreatment system of an internal combustion engine and control device for an exhaust gas aftertreatment system | |
DE10341454A1 (en) | Method for checking at least three sensors that detect a measurement variable in the area of an internal combustion engine | |
DE102019104537A1 (en) | Method for monitoring an ammonia slip catalyst | |
DE112017003110B4 (en) | Diagnostic procedure for an exhaust gas purification device with filter function | |
EP3222833B1 (en) | Method for monitoring the nox emissions of a vehicle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R012 | Request for examination validly filed | ||
R082 | Change of representative |
Representative=s name: DOERFLER, THOMAS, DR.-ING., DE |
|
R016 | Response to examination communication | ||
R018 | Grant decision by examination section/examining division | ||
R020 | Patent grant now final | ||
R082 | Change of representative |
Representative=s name: MARKOWITZ, MARKUS, DR.-ING., DE |