DE102011051476A1 - AFTERTREATMENT PROCEDURE - Google Patents
AFTERTREATMENT PROCEDURE Download PDFInfo
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- DE102011051476A1 DE102011051476A1 DE102011051476A DE102011051476A DE102011051476A1 DE 102011051476 A1 DE102011051476 A1 DE 102011051476A1 DE 102011051476 A DE102011051476 A DE 102011051476A DE 102011051476 A DE102011051476 A DE 102011051476A DE 102011051476 A1 DE102011051476 A1 DE 102011051476A1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/103—Oxidation catalysts for HC and CO only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—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]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0215—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission
- F02D41/0225—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the gear ratio or shift lever position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
- F02D41/1447—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures with determination means using an estimation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
- F02D41/405—Multiple injections with post injections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/021—Engine temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0414—Air temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
- F02D2200/501—Vehicle speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
- F02D2200/703—Atmospheric pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Materials Engineering (AREA)
- Exhaust Gas After Treatment (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Testing Of Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Ein Abgasnachbehandlungsverfahren weist folgende Schritte auf: Ermitteln, ob ein Fahrzustand einen RHU-Logikprozess zum raschen Anheben einer Temperatur eines Abgases, das durch eine Abgasstrecke (130) strömt, benötigt; Detektieren eines AN/AUS-Signals, das den RHU-Logikprozess ausführt oder beendet; Ermitteln, ob ein Injektionssignal zur Ausführung des RHU-Logikprozesses aktiviert ist; Detektieren eines Fehlerstatus einer oder mehrerer Komponenten zur Ausführung des RHU-Logikprozesses; und Detektieren der Temperatur des Abgases während der Ausführung des RHU-Logikprozesses und vergleichen der detektierten Temperatur mit einem modellierten Wert. Dementsprechend wird eine Fehlfunktion des RHU-Logikprozesses rechtzeitig vermieden, so dass der RHU-Logikprozess sicher ausgeführt wird und eine Fehlfunktion über ein Fehlersignal an den Fahrer gemeldet wird, wodurch die On-Board-Diagnosefunktion verbessert wird.An exhaust aftertreatment method includes the steps of: determining whether a driving condition requires an RHU logic process to rapidly raise a temperature of an exhaust gas flowing through an exhaust passage (130); Detecting an ON / OFF signal that executes or ends the RHU logic process; Determining whether an injection signal is enabled to perform the RHU logic process; Detecting an error status of one or more components to execute the RHU logic process; and detecting the temperature of the exhaust gas during execution of the RHU logic process and comparing the detected temperature with a modeled value. Accordingly, a malfunction of the RHU logic process is avoided in good time, so that the RHU logic process is carried out safely and a malfunction is reported to the driver via an error signal, which improves the on-board diagnostic function.
Description
Die vorliegende Anmeldung beansprucht die Priorität der
Die vorliegende Erfindung betrifft ein Abgasnachbehandlungsverfahren, das einen RHU-Logikprozess (rapid-heat-up: rasches Aufheizen) benutzt, um eine Temperatur des Abgases zur Aktivierung des Katalysators, der die im Abgas enthaltenen Schadstoffe reduziert, schnell anzuheben.The present invention relates to an exhaust aftertreatment method that uses a rapid heat-up (RHU) logic process to rapidly raise a temperature of the exhaust gas for activating the catalyst that reduces the pollutants contained in the exhaust gas.
In einer herkömmlichen Abgasreinigungsvorichtung sind ein Diesel-Oxidationskatalysator (DOC), ein Diesel-Partikelfilter (DPF) und eine Selective-Catalytic-Reduction(SCR)-Einheit aufeinander folgend entlang einer Abgasstrecke in einer vorbestimmten Reihenfolge angeordnet.In a conventional exhaust gas purifying apparatus, a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF) and a selective catalytic reduction (SCR) unit are successively arranged along an exhaust passage in a predetermined order.
Das Motorabgas passiert den DOC, den DPF und die SCR-Einheit der Reihe nach und dadurch werden darin enthaltene Schadstoffe beseitigt.Engine exhaust passes through the DOC, DPF and SCR unit in turn, eliminating any pollutants it contains.
Das bedeutet im Einzelnen, dass der DPF die im Abgas enthaltenen Partikel (PM) einfängt, der DOC die im Abgas enthaltenen Kohlenmonoxide und Kohlenwasserstoffe zu Kohlendioxiden oxidiert und die SCR-Einheit die im Abgas enthaltenen Stickoxide zu Stickstoff reduziert.Specifically, this means that the DPF captures particulates (PM) in the exhaust gas, the DOC oxidizes the carbon monoxide and hydrocarbons in the exhaust to carbon dioxide, and the SCR unit reduces the nitrogen oxides in the exhaust to nitrogen.
Die Abgastemperatur an einer stromaufwärts gelegenen Seite der SCR-Einheit muss oberhalb von 200°C sein, damit die Stickoxide aktiv mit dem Reduktionsmittel reagieren. Allerdings befindet sich die SCR-Einheit in einem hinteren Endbereich der Abgasstrecke, so dass eine vergleichsweise lange Zeit erforderlich ist, bis die Abgastemperatur an der Eingangsseite der SCR-Einheit 200°C erreicht.The exhaust gas temperature on an upstream side of the SCR unit must be above 200 ° C for the nitrogen oxides to actively react with the reductant. However, the SCR unit is located in a rear end portion of the exhaust passage, so that a comparatively long time is required until the exhaust gas temperature at the input side of the SCR unit reaches 200 ° C.
Dementsprechend werden die im Abgas enthaltenen Stickoxide vor dem Austritt nach außen kaum reduziert, bis die Abgastemperatur an einer Eingangsseite der SCR-Einheit 200°C erreicht.Accordingly, the nitrogen oxides contained in the exhaust gas are hardly reduced before leaving the outside until the exhaust gas temperature at one input side of the SCR unit reaches 200 ° C.
Daher ist ein RHU-Logikprozess (rapid-heat-up) für ein schnelles Anheben der Abgastemperatur schrittweise angewandt worden, um den Katalysator schnell aufzuheizen, und es ist erforderlich, einen Fahrzustand für die Ausführung des RHU-Logikprozesses zu ermitteln und einen Fehler desselben zu detektieren.Therefore, a rapid heat-up (RHU) logic process for rapidly raising the exhaust gas temperature has been applied stepwise to quickly heat the catalyst, and it is necessary to detect a driving condition for execution of the RHU logic process and to make a mistake thereof detect.
Die hier in Zusammenhang mit dem Stand der Technik der Erfindung offenbarten Informationen sollen lediglich dem besseren Verständnis des allgemeinen Standes der Technik dienen und sollen nicht als eine Anerkennung oder irgendeine Form von Hinweis verstanden werden, dass diese Informationen einen dem Fachmann wohlbekannten Stand der Technik darstellen.The information disclosed herein in connection with the prior art of the invention is merely for the better understanding of the general state of the art and should not be taken as an acknowledgment or any form of indication that this information represents a prior art well known to those skilled in the art.
Die vorliegende Erfindung wurde mit dem Bestreben gemacht, ein Abgasnachbehandlungsverfahren bereitzustellen, das Vorteile hinsichtlich der Ausführung des RHU-Logikprozesses für ein schnelles Anheben einer Temperatur des Abgases aufweist, und eine On-Board-Diagnosefunktion aufweist, die anzeigt, ob ein RHU-Logikprozess normal abläuft oder nicht.The present invention has been made in an effort to provide an exhaust aftertreatment method that has advantages in the implementation of the RHU logic process for quickly raising a temperature of the exhaust gas and has an on-board diagnostic function that indicates whether an RHU logic process is normal expires or not.
Ein Abgasnachbehandlungsverfahren weist folgende Schritte auf: Ermitteln, ob ein Fahrzustand einen RHU-Logikprozess zum raschen Anheben einer Temperatur eines Abgases, das durch eine Abgasstrecke (
Vorzugsweise weist das Abgasnachbehandlungsverfahren ferner den Schritt des Ausgebens eines Fehlersignals, wenn die detektierte Temperatur, die durch den RHU-Logikprozess angehoben worden ist, von dem modellierten Wert abweicht, auf.Preferably, the exhaust aftertreatment method further comprises the step of outputting an error signal when the detected temperature that has been raised by the RHU logic process deviates from the modeled value.
Vorzugsweise weist das Abgasnachbehandlungsverfahren ferner die Schritte des Akkumulierens des Fehlersignals und des Speicherns des akkumulierten Wertes und des Aktivierens einer RHU-Logik-Warnlampe, wenn der akkumulierte Wert einen vorgegebenen Wert übersteigt.Preferably, the exhaust aftertreatment method further comprises the steps of accumulating the error signal and storing the accumulated value and activating an RHU logic warning lamp when the accumulated value exceeds a predetermined value.
Vorzugsweise muss der Fahrzustand für die Ausführung des RHU-Logikprozesses eine Eintrittsbedingung für den Eintritt in den RHU-Logikprozess erfüllen, wobei die Eintrittsbedingung ermittelt wird auf der Basis eines Atmosphärendrucks, einer Fahrzeuggeschwindigkeit, einer Motordrehzahl, einer Ansauglufttemperatur, einer Kühlmitteltemperatur, einer Getriebestufe und einer Kraftstoffeinspritzmenge.Preferably, the running state for executing the RHU logic process must satisfy an entry condition for entering the RHU logic process, wherein the entry condition is determined based on an atmospheric pressure, a vehicle speed, an engine speed, an intake air temperature, a coolant temperature, a gear stage, and a fuel injection quantity.
Vorzugsweise wird, wenn die Eintrittsbedingung für den Eintritt in den RHU-Logikprozess erfüllt ist, eine Nacheinspritzmenge für die Ausführung des RHU-Logikprozesses auf der Basis der Motordrehzahl und der Kraftstoffeinspritzmenge ermittelt und die Kraftstoffeinspritzmenge erhöht.Preferably, when the entry condition for entry into the RHU logic process is satisfied, an after-injection amount for the execution of the RHU logic process is determined based on the engine speed and the fuel injection amount and the fuel injection amount is increased.
Vorzugsweise weist in dem Schritt des Detektierens eines Fehlerstatus einer oder mehrerer Komponenten eine der Komponenten einen Injektor zur Kraftstoffeinspritzung und einen Temperatursensor zum Detektieren der Temperatur des Abgases auf.Preferably, in the step of detecting an error status of one or more components, one of the components includes an injector Fuel injection and a temperature sensor for detecting the temperature of the exhaust gas.
Vorzugsweise sind ein Diesel-Oxidationskatalysator, der im Abgas enthaltene Schadstoffe oxidiert, ein Diesel-Partikelfilter, der im Abgas enthaltene Partikel filtert, ein Dosiermodul, das ein Reduktionsmittel in das Abgas, das durch die Abgasstrecke strömt, einspritzt, und eine SCR-Einheit (selective catalytic reduction), die das von dem Dosiermodul eingespritzte Reduktionsmittel nutzt, um im Abgas enthaltene Stickoxide zu reduzieren bzw. zu oxidieren, nacheinander in der Abgasstrecke angeordnet.Preferably, a diesel oxidation catalyst that oxidizes pollutants contained in the exhaust gas, a diesel particulate filter that filters particulates contained in the exhaust gas, a metering module that injects a reducing agent into the exhaust gas flowing through the exhaust gas passage, and an SCR unit ( Selective catalytic reduction), which uses the injected from the metering module reducing agent to reduce nitrogen oxides contained in the exhaust or oxidize, arranged sequentially in the exhaust gas line.
Vorzugsweise detektiert ein Temperatursensor Temperaturen stromabwärts des Motors, stromaufwärts des Diesel-Oxidationskatalysators, stromaufwärts des Diesel-Partikelfilters und stromaufwärts der SCR-Einheit.Preferably, a temperature sensor detects temperatures downstream of the engine, upstream of the diesel oxidation catalyst, upstream of the diesel particulate filter and upstream of the SCR unit.
Durch das Abgasnachbehandlungsverfahren gemäß der vorliegenden Erfindung wird, wie oben beschrieben, einer Fehlfunktion des RHU-Logikprozesses frühzeitig vorgebeugt, um die RHU-Logik sicher zu realisieren und den Fahrer über eine Fehlfunktion mittels eine Fehlersignals zu informieren, so dass die On-Board-Diagnosefunktion verbessert wird.As described above, according to the exhaust gas aftertreatment method according to the present invention, a malfunction of the RHU logic process is prevented at an early stage to surely realize the RHU logic and inform the driver of a malfunction by means of an error signal, so that the on-board diagnostic function is improved.
Die Verfahren und Vorrichtungen der vorliegenden Erfindung haben weitere Merkmale und Vorteile, wie im Detail aus den angehängten und den folgenden näheren Beschreibungen sichtbar werden, die hierin einbezogen sind und die zusammen zur Erläuterung gewisser Prinzipien der vorliegenden Erfindung dienen.The methods and apparatus of the present invention have further features and advantages, as will become apparent in detail from the appended and the following detailed descriptions, which are incorporated herein and together serve to explain certain principles of the present invention.
Es wird nun im Detail Bezug genommen auf die verschiedenen Ausführungsformen der vorliegenden Erfindung, von denen Beispiele in den beiliegenden Zeichnungen dargestellt sind. Während die Erfindung im Zusammenhang mit den Ausführungsbeispielen beschrieben wird, versteht sich, dass die vorliegende Beschreibung nicht beabsichtigt, die Erfindungen auf diese beispielhafte Ausführungsformen zu beschränken. Auf der anderen Seite ist beabsichtigt, dass die Erfindung nicht nur die beispielhaften Ausführungsformen, sondern auch verschiedene Alternativen, Modifikationen Äquivalente und andere Ausführungsformen decken, die in den Sinn und Schutzbereich der Erfindung fallen, wie in den angehängten Patentansprüchen definiert.Reference will now be made in detail to the various embodiments of the present invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in conjunction with the embodiments, it is to be understood that the present description is not intended to limit the invention to those exemplary embodiments. On the other hand, it is intended that the invention not only cover the exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that fall within the spirit and scope of the invention as defined in the appended claims.
Wie in
Der Injektor
Das Abgas des Motors
Der Temperatursensor T4–T7 detektiert eine Temperatur des Abgases, das in den Diesel-Oxidationskatalysator
Das Steuergerät
Des Weiteren verwendet das Steuergerät
Wie in
Des Weiteren kann die Überwachung einer RHU-Funktion selbst als ein Zustand verstanden werden, der die Ausführung des RHU-Logikprozesses rechtfertigt.Furthermore, the monitoring of an RHU function itself may be understood as a condition that justifies the execution of the RHU logic process.
Insbesondere, im Block
In einem Schritt S210 der
Das Injektionssignal beinhaltet ein Betriebssignal, das von dem Steuergerät
In einem Schritt S230 wird ein Fehler der Komponenten für die Ausführung der RHU-Logik detektiert. Wie im Block
In einem Schritt S240 wird eine Temperatur des Abgases während des raschen Aufheizens (RHU) detektiert und die detektierte Temperatur mit einer modellierten Temperatur verglichen. Es wird ermittelt, ob sich die Temperatur des Abgases innerhalb eines vorbestimmten Temperaturbereichs bewegt.In a step S240, a temperature of the exhaust gas during the rapid heating (RHU) is detected, and the detected temperature is compared with a modeled temperature. It is determined whether the temperature of the exhaust gas is within a predetermined temperature range.
Wenn die RHU-Funktion in einem Schritt S250 beendet ist, endet die Überwachung mit der Ausgabe des Ergebnisses. Wie in Blöcken
Insbesondere, wenn die Abgastemperatur während der Überwachung einen vorbestimmten Temperaturbereich überschreitet, wird das generierte Fehlersignal gezählt und deren Anzahl gespeichert.In particular, if the exhaust gas temperature during monitoring exceeds a predetermined temperature range, the generated error signal is counted and stored their number.
Wenn die Anzahl einen vorbestimmten oder modellierten Wert überschreitet, wird ermittelt, dass die RHU-Logik anormal betrieben wird, so dass eine Warnlampe, z. B. eine Fehlfunktionswarnlampe aktiviert wird.If the number exceeds a predetermined or modeled value, it is determined that the RHU logic is abnormally operated so that a warning lamp, e.g. B. a malfunction warning lamp is activated.
Wie in
Wie gezeigt, ist ein Bereich der RHU-Modelltemperatur
Zusätzlich wird ein mittels Fahrzustand bzw. Betriebspunkt des Motors und dem RHU modellierter Temperaturverlauf
Das Steuergerät
Zwecks Erläuterung und genauer Definition der angehängten Ansprüche werden Begriffe wie zum Beispiel „obere”, „untere”, „innere” und „äußere” zur Beschreibung der Merkmale der beispielhaften Ausführungsformen mit Bezug auf die Merkmale verwendet, wie sie in den Figuren dargestellt sind.For purposes of explanation and detail of the appended claims, terms such as "upper," "lower," "inner," and "outer" are used to describe the features of the exemplary embodiments with respect to the features illustrated in the figures.
Die vorhergehenden Beschreibungen der spezifischen beispielhaften Ausführungsformen der vorliegenden Erfindung dienen dem Zweck der Darstellung und Beschreibung. Sie sollen nicht als erschöpfend oder die Erfindung auf die genaue offenbarte Form einschränkend verstanden werden. Es sind offensichtlich viele Modifikationen und Variationen möglich angesichts der obigen Lehre. Die beispielhaften Ausführungsformen wurden ausgewählt und beschrieben, um bestimmte Grundsäte der Erfindung und deren praktische Anwendung zu erläutern und damit dem Fachmann die Herstellung und den Gebrauch der verschiedenen Ausführungsformen der vorliegenden Erfindung sowie von deren zahlreichen Alternativen und Modifikationen zu ermöglichen. Es ist beabsichtigt, dass der Schutzumfang der Erfindung durch die angeführten Ansprüche und deren Äquivalente definiert werden.The foregoing descriptions of the specific exemplary embodiments of the present invention are for the purpose of illustration and description. They are not to be construed as exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teachings. The exemplary embodiments have been selected and described to reflect certain principles of the invention To explain the invention and its practical application and thus to enable the skilled person to manufacture and use of the various embodiments of the present invention and of its numerous alternatives and modifications. It is intended that the scope of the invention be defined by the appended claims and their equivalents.
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
- KR 10-2010-0120936 [0001] KR 10-2010-0120936 [0001]
Claims (8)
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KR1020100120936 | 2010-11-30 | ||
KR1020100120936A KR101251515B1 (en) | 2010-11-30 | 2010-11-30 | Exhaust gas post processing method |
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DE102011051476A1 true DE102011051476A1 (en) | 2012-05-31 |
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DE102011051476A Withdrawn DE102011051476A1 (en) | 2010-11-30 | 2011-06-30 | AFTERTREATMENT PROCEDURE |
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US (1) | US20120131905A1 (en) |
JP (1) | JP2012117512A (en) |
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DE102017218322A1 (en) * | 2017-10-13 | 2019-04-18 | Continental Automotive Gmbh | Method for operating an exhaust aftertreatment system of a diesel engine with emission control as a function of the stored NH3 |
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US9870651B1 (en) | 2016-07-25 | 2018-01-16 | Robert Bosch Gmbh | Diagnostic testing of rapid heat up of an exhaust sytem during engine decompression |
CN111580503A (en) * | 2020-05-22 | 2020-08-25 | 河南安捷交通科技有限公司 | Environment-friendly detection system and method based on OBD vehicle-mounted diagnosis system |
US11881093B2 (en) | 2020-08-20 | 2024-01-23 | Denso International America, Inc. | Systems and methods for identifying smoking in vehicles |
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- 2011-06-24 US US13/168,217 patent/US20120131905A1/en not_active Abandoned
- 2011-06-30 DE DE102011051476A patent/DE102011051476A1/en not_active Withdrawn
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DE102017218322A1 (en) * | 2017-10-13 | 2019-04-18 | Continental Automotive Gmbh | Method for operating an exhaust aftertreatment system of a diesel engine with emission control as a function of the stored NH3 |
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CN102477888A (en) | 2012-05-30 |
US20120131905A1 (en) | 2012-05-31 |
KR101251515B1 (en) | 2013-04-05 |
KR20120059265A (en) | 2012-06-08 |
JP2012117512A (en) | 2012-06-21 |
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