US20150086455A1 - Method for operating an exhaust gas system, method for operating a motor vehicle and motor vehicle - Google Patents

Method for operating an exhaust gas system, method for operating a motor vehicle and motor vehicle Download PDF

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Publication number
US20150086455A1
US20150086455A1 US14/556,416 US201414556416A US2015086455A1 US 20150086455 A1 US20150086455 A1 US 20150086455A1 US 201414556416 A US201414556416 A US 201414556416A US 2015086455 A1 US2015086455 A1 US 2015086455A1
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United States
Prior art keywords
catalytic converter
heater
operating
motor vehicle
temperature
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.)
Abandoned
Application number
US14/556,416
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English (en)
Inventor
Carsten Kruse
Thomas Nagel
Richard Dorenkamp
Gerhard Kahmann
Thorsten Duesterdiek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volkswagen AG
Vitesco Technologies Lohmar Verwaltungs GmbH
Original Assignee
Emitec Gesellschaft fuer Emissionstechnologie mbH
Volkswagen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Emitec Gesellschaft fuer Emissionstechnologie mbH, Volkswagen AG filed Critical Emitec Gesellschaft fuer Emissionstechnologie mbH
Publication of US20150086455A1 publication Critical patent/US20150086455A1/en
Assigned to EMITEC GESELLSCHAFT FUER EMISSIONSTECHNOLOGIE MBH, VOLKSWAGEN AG reassignment EMITEC GESELLSCHAFT FUER EMISSIONSTECHNOLOGIE MBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KRUSE, CARSTEN, NAGEL, THOMAS, DORENKAMP, RICHARD, KAHMANN, GERHARD, DUESTERDIEK, THORSTEN
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • 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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
    • 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
    • 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
    • F01N2900/1626—Catalyst activation 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
    • 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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • F01N3/2026—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect
    • 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

Definitions

  • the invention relates to a method for operating an exhaust system of an internal combustion engine, with the intention of reducing the pollutant emissions of the internal combustion engine, in particular, after a cold start.
  • the invention also relates to a method for operating a motor vehicle and a motor vehicle.
  • a system of this type it should be possible for a system of this type to be set in a particularly effective manner and operated efficiently, with regard to pollutant values, for the entire service life or operating duration in a motor vehicle.
  • a method for operating an exhaust system of an internal combustion engine in which the exhaust system has at least one heating device and a catalytic converter for the conversion of hydrocarbons comprises operating the heating device with adaptation as a function of the aging state of the catalytic converter.
  • this method is suitable for the operation of an exhaust system of a diesel combustion engine.
  • DOC diesel oxidation catalytic converters
  • the light-off temperatures are approximately 130 to 180° C. These, however, shift toward higher temperatures as the catalytic converter ages.
  • a catalytic converter for the conversion of hydrocarbons refers, in particular, to a so-called oxidation catalytic converter or diesel oxidation catalytic converter (DOC), that is to say a substrate body (for example in the form of a ceramic and/or metallic honeycomb body) with a coating with oxidizing action.
  • the coating with oxidizing action may include a carrier substance (for example a so-called washcoat) that is doped with high-grade metals and/or rare earth elements.
  • DOC diesel oxidation catalytic converter
  • the coating with oxidizing action may include a carrier substance (for example a so-called washcoat) that is doped with high-grade metals and/or rare earth elements.
  • a carrier substance for example a so-called washcoat
  • platinum, palladium and the like are used in particular.
  • the at least one heating device or heater includes, in particular, an electrical, regulable heating element.
  • the heating device is preferably constructed in such a way that the exhaust gas can flow through it (for example by being formed with a multiplicity of throughflow openings or ducts) and it is suitable for increasing the temperature of the exhaust gas as it flows through. It is very particularly preferable for the heating device to include a honeycomb body, in particular a honeycomb body constructed with metallic sheets and/or foils.
  • the heating device is preferably disposed upstream of the catalytic converter, in such a way that the exhaust gas flows firstly through the heating device and then through the catalytic converter.
  • the heating device is at least partially integrated in the catalytic converter and/or disposed directly adjacent thereto.
  • the latter is generally connected to a corresponding current supply/voltage supply and to a controller.
  • a controller In this way, it is possible for an activation or deactivation of the at least one heating device to be triggered by using the controller at predefined times and/or in the presence of predefined parameters.
  • the way in which this regulation or this operation is performed is the subject matter of the present invention.
  • the heating device to be operated with adaptation as a function of the aging state of the catalytic converter.
  • this also means that the heating power that is provided is approximated, adjusted and/or set up for the present aging state of the catalytic converter.
  • the present conversion capability of the catalytic converter is determined and taken into consideration.
  • This encompasses, in particular, operating processes which give rise to operation that varies over the service life of the exhaust system (exclusively) as a function of the aging state of the catalytic converter.
  • the aging state of the catalytic converter may be characterized, in particular, by the following factors:
  • the aging state of the catalytic converter may be determined, in particular, on the basis of the distance traveled with the catalytic converter or by the motor vehicle. Furthermore, the aging state may be determined on the basis of the time period since the catalytic converter was manufactured and/or since it was installed in an exhaust system. Further parameters that may play a role in the determination of the aging state are: type of catalytic loading, coating type, coating thickness, number of regeneration cycles during operation, maximum temperatures reached, averaged temperature (or temperature histogram), amount of exhaust gas that has flowed through, exhaust-gas type, fuel type, possible combination of different fuel types (additives of bioethanol etc.), oil consumption, etc.
  • a (differently weighted) combination of the parameters for the determination and/or weighting of the aging state is also possible.
  • the conversion performance of the catalytic converter can be detected by a sensor device, for example using the lambda sensors, which are disposed in and/or downstream of the catalytic converter and which determine the storage capacity of the catalytic converter for oxygen. It is also possible to determine the conversion performance of the catalytic converter from the measurement values.
  • the heating device is operated at least as a function of a predefined threshold temperature of the catalytic converter, wherein the predefined threshold temperature varies as a function of a present age of the catalytic converter.
  • the light-off temperature is lower in the case of a new catalytic converter than in the case of an already aged catalytic converter. This may have the effect that the light-off temperature of a new catalytic converter lies in a temperature range so low that the catalytic converter is already ready for use when only an insignificant quantity of unburned hydrocarbons has passed through the catalytic converter. In this case, for example, in the case of this configuration, heating of the exhaust system is not imperatively necessary.
  • the threshold temperature in this case is not constant over the service life or operating duration of the exhaust system, but is variable.
  • the threshold temperature is affected by the present age or aging state of the catalytic converter.
  • the predefined threshold temperature of the catalytic converter consequently generally increases in this time period. This may take place continuously and/or in stepped fashion. If appropriate, the threshold temperature may be lowered again after a cleaning or decontamination of the catalytic converter.
  • the age-dependent threshold temperature at which the catalytic converter reaches the light-off temperature is also advantageous for the age-dependent threshold temperature at which the catalytic converter reaches the light-off temperature to be known at all times during the operation of the internal combustion engine.
  • the threshold temperature correspondingly varies as a function of the present age or aging state of the catalytic converter. Consequently, with progressive aging of the catalytic converter, the heating device is activated correspondingly earlier, or for longer, in order for the catalytic converter to be brought, preferably (precisely) then, to a temperature above or equal to the threshold temperature.
  • the method has at least the following steps:
  • the conversion temperature refers, in particular, to the temperature of the catalytic converter at the time at which a certain (still admissible) quantity of unburned hydrocarbons has already flowed through the catalytic converter without being converted by the (active) catalytic converter.
  • the determination of the conversion temperature of the catalytic converter is performed only when it is to be assumed, due to the aging state of the catalytic converter, that the threshold temperature is already higher than the conversion temperature. Cyclic and/or continuous interrogation of the conversion temperature of the catalytic converter is also possible.
  • the conversion temperature preferably corresponds to the temperature that the catalytic converter must be at at the time when a number of unburned hydrocarbons reaching the catalytic converter would exceed the admissible quantity of unburned hydrocarbons that may be discharged to the environment.
  • the admissible quantity is, in particular, predefined by emissions regulations.
  • the conversion temperature does not need to be measured at the catalytic converter itself and/or correspond to temperatures measured at other locations in the exhaust line. Rather, the conversion temperature may also be determined mathematically on the basis of the exhaust-gas temperature. Accordingly, the heating device for heating the catalytic converter is, in particular, operated only when the conversion temperature falls below the present threshold temperature, that is to say for example when the light-off temperature of the catalytic converter has not yet been reached.
  • an adaptation of a heating power of the heating device is realized by operating a different number of heating segments or by implementing a different activation duration of the heating device.
  • the measures may self-evidently be implemented in combination with one another.
  • a method for operating a motor vehicle which comprises implementing the method not in a first operating phase of the motor vehicle but only when the predefined threshold temperature reaches a particular value.
  • the first operating phase may, in particular, be characterized by at least one of the following parameters:
  • a motor vehicle comprising an internal combustion engine, an exhaust system and a controller, wherein the exhaust system has at least one heating device and a catalytic converter disposed downstream of the heating device.
  • the controller is constructed or programmed for carrying out the method according to the invention.
  • FIG. 1 is a block diagram of a motor vehicle having an exhaust system
  • FIG. 2 is a diagrammatic, cross-sectional view of a heating device
  • FIG. 3 is a diagram showing a possible variation of a threshold temperature of a catalytic converter as a function of its age
  • FIG. 4 is a diagram showing an operating state of an internal combustion engine.
  • a motor vehicle 6 has an internal combustion engine 5 with an exhaust system 1 , in which a heating device or heater 4 and a catalytic converter 3 are provided in the exhaust system 1 .
  • the catalytic converter 3 is assigned sensors 13 which are suitable, for example, for determining the respectively prevailing temperature of the catalytic converter 3 .
  • the sensors 13 are connected by control lines 14 to a controller 7 , so that it is possible firstly for the determined sensor values to be transmitted and also secondly for electric heating of the heating device 4 to be realized over the control lines 14 .
  • the controller 7 is connected to the internal combustion engine 5 through control lines 14 , in such a way that the controller 7 can receive information regarding operating states of the internal combustion engine 5 .
  • the controller may additionally be formed with at least one memory element or have access to such a memory element in which, for example, characteristic maps, empirical values, parameter threshold values and the like can be accessed and/or adapted.
  • FIG. 2 shows, in a cross section, a structural variant of a heating device 4 in the form of a honeycomb body wherein, in this case, various heating segments 10 are additionally disposed annularly around one another.
  • the heating device 4 has smooth metallic foils 17 and structured metallic foils 16 which are stacked and/or wound and/or coiled on one another to form the heating device 4 .
  • the structured foils 16 and/or smooth foils 17 are connected to one or more non-illustrated electrodes, in such a way that the heating device 4 can be operated, for example, as a resistance heater.
  • FIG. 3 shows a potential profile or course of a threshold temperature 8 over the operating duration or service life of the catalytic converter in the exhaust system as a function of the age 11 of the catalytic converter.
  • the temperature 9 is plotted on the vertical axis, and the age 11 of the catalytic converter is plotted on the horizontal axis.
  • FIG. 3 shows that, with progressive aging 11 of the catalytic converter, the threshold temperature 8 is also shifted toward higher temperature values. Accordingly, at a particular time 12 , an aging state of the catalytic converter is reached at which a particular threshold temperature 8 can be determined.
  • FIG. 4 shows an operating state of the internal combustion engine 5 , wherein the time 15 is plotted on the horizontal axis and the temperature 9 is plotted on the vertical axis.
  • the temperature 9 is, in particular, the respectively present temperature detected by using a temperature sensor 13 .
  • the determined temperature 9 of the catalytic converter corresponds to the conversion temperature 2 at which the catalytic conversion of hydrocarbons by the catalytic converter must take place because a quantity of unburned hydrocarbons that is still just admissible has already passed through the catalytic converter.
  • a threshold temperature 8 prevails which lies above the presently determined temperature 9 or the conversion temperature 2 . This means that heating by using the heating device is necessary in order to heat the catalytic converter to a corresponding threshold temperature 8 in such a way that the unburned hydrocarbons can be converted in the catalytic converter.
  • the present invention solves the problems highlighted with regard to the prior art.
  • a method for operating an exhaust system is specified, which ensures that the lowest possible quantity of unburned hydrocarbons flows through the exhaust line into the environment.
  • the proposed system can be set in a particularly effective manner and operated efficiently, with regard to pollutant values, for the entire service life or operating duration in a motor vehicle. In particular, this yields cost advantages, and permits practically complete conversion of the hydrocarbons over the entire operating duration of the exhaust system, with little expenditure of energy.
US14/556,416 2012-05-30 2014-12-01 Method for operating an exhaust gas system, method for operating a motor vehicle and motor vehicle Abandoned US20150086455A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102012104669.7 2012-05-30
DE102012104669A DE102012104669A1 (de) 2012-05-30 2012-05-30 Verfahren zum Betrieb einer Abgasanlage
PCT/EP2013/060305 WO2013178495A1 (de) 2012-05-30 2013-05-17 Verfahren zum betrieb einer abgasanlage

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/060305 Continuation WO2013178495A1 (de) 2012-05-30 2013-05-17 Verfahren zum betrieb einer abgasanlage

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US20150086455A1 true US20150086455A1 (en) 2015-03-26

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US14/556,416 Abandoned US20150086455A1 (en) 2012-05-30 2014-12-01 Method for operating an exhaust gas system, method for operating a motor vehicle and motor vehicle

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US (1) US20150086455A1 (de)
EP (1) EP2855869B1 (de)
JP (1) JP6185570B2 (de)
DE (1) DE102012104669A1 (de)
WO (1) WO2013178495A1 (de)

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CN113272533A (zh) * 2019-01-11 2021-08-17 罗伯特·博世有限公司 用于确定废气后处理系统的老化行为的方法和装置
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