WO2020069550A1 - Procédé et système de moteur à allumage commandé à post-traitement amélioré des gaz d'échappement par une stratégie de coupure d'alimentation en poussée - Google Patents

Procédé et système de moteur à allumage commandé à post-traitement amélioré des gaz d'échappement par une stratégie de coupure d'alimentation en poussée

Info

Publication number
WO2020069550A1
WO2020069550A1 PCT/AT2019/060330 AT2019060330W WO2020069550A1 WO 2020069550 A1 WO2020069550 A1 WO 2020069550A1 AT 2019060330 W AT2019060330 W AT 2019060330W WO 2020069550 A1 WO2020069550 A1 WO 2020069550A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
gasoline engine
catalytic converter
operating phase
catalyst
Prior art date
Application number
PCT/AT2019/060330
Other languages
German (de)
English (en)
Inventor
Peter GÖTSCHL
Kurt Prevedel
Peter Berger
Paul DR. KAPUS
Gernot Koller
Original Assignee
Avl List Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Avl List Gmbh filed Critical Avl List Gmbh
Priority to CN201980061337.4A priority Critical patent/CN112771263A/zh
Priority to DE112019004982.8T priority patent/DE112019004982A5/de
Publication of WO2020069550A1 publication Critical patent/WO2020069550A1/fr

Links

Classifications

    • 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
    • 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
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • 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
    • F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
    • 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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • F02D41/0052—Feedback control of engine parameters, e.g. for control of air/fuel ratio or intake air amount
    • 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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
    • 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
    • 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
    • F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
    • 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
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0802—Temperature of the exhaust gas treatment apparatus
    • 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
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0814—Oxygen storage amount
    • 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
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0816—Oxygen storage capacity
    • 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
    • F02D41/0295—Control according to the amount of oxygen that is stored on the exhaust gas treating apparatus
    • 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
    • F02D41/1454—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 an oxygen content or concentration or the air-fuel ratio
    • 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
    • F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
    • F02D41/1475—Regulating the air fuel ratio at a value other than stoichiometry
    • 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 and a gasoline engine arrangement according to the
  • the gasoline engine according to the prior art is first operated under-stoichiometric or rich when the combustion is restarted, as a result of which the oxygen stored in the exhaust gas components can be oxidized.
  • This rich operation of the gasoline engine can result in a brief increase in fuel consumption, which partially counteracts the savings made during the overrun fuel cut-off.
  • This rich operation of the gasoline engine can local and sometimes harmful heat areas in the catalysts and a short-term increase in fuel consumption.
  • Exhaust gas aftertreatment system especially the 3-way catalytic converter, only for a short time if it is flushed with air, for example, in overrun phases.
  • the object of the invention is to overcome the disadvantages of the prior art.
  • it is an object of the invention to provide a method and a gasoline engine arrangement which have a low, in particular relevant to everyday use,
  • Fuel consumption and the lowest pollutant emissions possible Furthermore, it is an object of the invention, among other things, to reduce or preferably resolve a possible situational cross-influencing of the target variables mentioned, namely fuel consumption and pollutant emissions. Furthermore, it is an object of the invention to come closer to the so-called vision of “zero impact emission” in order to achieve this
  • the invention relates to a method for operating a gasoline engine arrangement in an operating phase, which comprises a normal operating phase and a coasting operating phase, the gasoline engine arrangement comprising a gasoline engine and a
  • the overrun phase is formed by at least one unfired overrun phase and / or at least one fired overrun phase, and in the fired overrun phase the gas flowing through the main catalyst is low in oxygen, in particular essentially oxygen-free, and in particular the exhaust gas of a stoichiometric or sub-stoichiometric one, in particular
  • Thrust operating phase that exhaust gas is supplied via an exhaust gas recirculation line that before or during the transition from the normal operating phase to the unfired
  • Thrust operating phase was generated in the gasoline engine, or that the gasoline is supplied to the gasoline engine in the unfired overrun thrust operating phase via an exhaust gas recirculation line, which before or during the transition from a fired
  • Thrust operation phase was generated in the unfired overrun operation phase in the gasoline engine.
  • Exhaust gas is therefore recirculated via the exhaust gas recirculation line, so that in particular the main catalytic converter is kept in a predetermined window.
  • oxygen-free exhaust gas is recirculated via the exhaust gas recirculation line. This continues until the gasoline engine burns again and thus emits oxygen-free exhaust gas.
  • the gasoline engine arrangement can be the gasoline engine arrangement
  • the gasoline engine may oscillate around a lambda value l of 1.0 and be operated and / or regulated with a lambda value l in the range from 0.9 to 1.1, preferably from 0.95 to 1.05. It can be provided that the gasoline engine is operated and / or regulated in phases or permanently under or over stoichiometric or rich or lean in its normal operating phase.
  • the exhaust gas aftertreatment components of the gasoline engine arrangement allow a sufficiently high, in particular, under these conditions
  • Gas flowing through the main catalyst is low in oxygen, in particular essentially oxygen-free.
  • the degree of conversion of the pollutants by the exhaust gas aftertreatment components should be ensured in total. This can be a sufficiently high
  • Exhaust aftertreatment system falls below a pollutant emission conversion degree threshold, below which there is no longer a sufficiently high pollutant emission reduction. It may be
  • the pollutant emission conversion degree threshold is as large as possible, especially in a range as close as possible to 100%.
  • the exhaust gas aftertreatment system comprises at least one main catalytic converter, in particular a catalytic converter acting as a 3-way catalytic converter.
  • the exhaust gas generated in the gasoline engine flows through the main catalytic converter
  • the exhaust gas aftertreatment system may include the main catalytic converter (s) and optionally one or more pre-catalytic converter (s) and / or one or more secondary catalytic converter (s), in particular one or more oxidation catalytic converter (s) comprising an oxidation catalytic converter coating, and / or one or more heating catalytic converter (s) and / or one or more gas engine particle filters and / or one or more NOx storage catalytic converter (s) and / or one or more, in particular coated / gaseous exhaust gas aftertreatment
  • the exhaust gas aftertreatment system can be composed of the fluff catalytic converter (s) and optionally one or more pre-catalytic converter (s) and / or one or more secondary catalytic converter (s), in particular one or more oxidation catalytic converter (s) comprising an oxidation catalytic converter coating, and / or one or more meat catalyst and / or one, in particular one or more gaseous exhaust gas aftertreatment, gasoline engine particle filter and / or one or more NOx storage catalyst / s and / or one or more exhaust gas treatment component / s, which comprises a NOx storage catalyst coating / s, and / or one or more SCR system / s and / or one or more exhaust gas aftertreatment component / s, which comprises an SCR coating / s, and / or a secondary air injection.
  • the gasoline engine arrangement In the operating phase, which includes the normal operating phase and the overrun operating phase, the gasoline engine arrangement is in operation.
  • fuel and air can be introduced into the combustion chambers of the cylinders of the gasoline engine and converted to exhaust gas by combustion.
  • the gasoline engine can be towed by the swinging mass of the internal combustion engine.
  • This overrun phase can comprise at least one unfired overrun operating phase and / or at least one fired overrun operating phase.
  • the fuel supply to the gasoline engine is usually interrupted and air is pumped through the gasoline engine.
  • This air pumped by the gasoline engine flows through the exhaust gas aftertreatment system, which on the one hand can reduce fuel consumption, on the other hand the main catalytic converter can be reduced for a short time as a result of the unfired overrun operating phase
  • the fuel supply to the gasoline engine is only reduced and, for example, only the amount of fuel that is required to convert the amount of oxygen introduced by the air into a low-oxygen, in particular essentially oxygen-free, exhaust gas is introduced into the combustion chambers of the gasoline engine.
  • stoichiometric or substoichiometric combustion takes place in the combustion chambers of the gasoline engine.
  • this can prevent and / or reduce the negative effects of oxygen flooding on the oxygen-sensitive exhaust gas aftertreatment components of the exhaust gas aftertreatment system, on the other hand, fuel is also consumed in overrun mode and CO2 is emitted as a result.
  • the gasoline engine according to the invention is supplied with the low-oxygen, essentially oxygen-free, exhaust gas generated before or during the transition to the unfired overrun operating phase.
  • the low-oxygen, essentially oxygen-free, exhaust gas can be in the normal operating phase or in the fired
  • Oxygen-free, exhaust gas in the unfired overrun operating phase flows through the gasoline engine and then, if appropriate, the exhaust gas aftertreatment system, in particular the main catalytic converter, and is then fed back to the gasoline engine through the exhaust gas recirculation line.
  • Main catalytic converter or the main catalytic converter to be understood to mean one or more catalytic converter (s), in particular several main catalytic converters, which have essentially the same effect and / or function.
  • the at least one main catalyst comprises one or more catalysts, in particular one or more pre- or secondary catalysts and / or one or more
  • the at least one main catalytic converter is formed from one or more main catalytic converter (s), in particular from one or more primary and / or secondary catalytic converter (s) and / or from one or more heating catalytic converter (s). At least one of the abovementioned catalysts is preferably coated with a 3-way coating. It is optionally provided that the method is automated, in particular in a control unit of a motor vehicle and / or by a control unit of a
  • Motor vehicle, controlled and / or regulated is executed.
  • the exhaust gas of the gasoline engine is fed to the main catalytic converter in the normal operating phase and / or in the fired overrun mode, and that this main catalytic converter is designed or acts as a 3-way catalytic converter.
  • the exhaust gas of the gasoline engine generated by the combustion of fuel is the exhaust gas aftertreatment system, in particular the
  • Main catalyst flows through and then released into the environment and / or enters the exhaust gas recirculation line.
  • the oxygen content of the exhaust gas located in the main catalytic converter or that the oxygen content of the exhaust gas flowing through the main catalytic converter essentially occurs in the unfired overrun operating phase corresponds to the oxygen content of the exhaust gas flowing through the main catalytic converter in the normal operating phase or in the fired overrun operating phase.
  • Thrust operation phase exhaust gas generated by the combustion of the fuel in the combustion chambers of the cylinders of the gasoline engine is circulated in the unfired overrun operation phase.
  • the exhaust gas supplied to the gasoline engine in the unfired overrun operating phase first flows through the exhaust gas recirculation line, then through the gasoline engine and then, if appropriate, through the exhaust gas aftertreatment system, in particular the
  • the exhaust gas can be pumped in a circle as long as the unfired overrun operating phase continues. This means that, if necessary, the exhaust gas can be pumped several times or continuously through the exhaust gas recirculation line, the gasoline engine and, if appropriate, the exhaust gas aftertreatment system, in particular the main catalytic converter.
  • the exhaust gas generated before or during the transition to the unfired overrun operating phase is introduced into the gasoline engine via the exhaust gas recirculation line and then back into the exhaust gas recirculation line for supplying the generated exhaust gas to the gasoline engine.
  • the exhaust gas generated before or during the transition to the unfired overrun operating phase is introduced via the exhaust gas recirculation line into the gasoline engine, then into the exhaust gas aftertreatment system, in particular the main catalytic converter, and then again into the exhaust gas recirculation line for supplying the generated exhaust gas to the gasoline engine .
  • the oxygen content of the exhaust gas located in the main catalytic converter in the normal operating phase and / or in the coasting operating phase, in particular in the unfired coasting operating phase is less than 5% by volume or essentially zero, or that the oxygen content of the in the main catalytic converter and at least one further catalytic converter of the exhaust gas aftertreatment system in the normal operating phase and / or in the overrun operating phase,
  • the oxygen content of the exhaust gas in the main catalytic converter and all other catalysts of the exhaust gas aftertreatment system is in the normal operating phase and / or in the overrun phase, in particular in the unfired overrun phase, is less than 5% by volume or substantially zero.
  • Thrust operation phase in particular in the unfired overrun operation phase, is less than 5% by volume or essentially zero.
  • Thrust operation phase in particular in the unfired overrun operation phase, is less than 5% by volume or essentially zero.
  • Normal operating phase and the fired overrun operating phase generated exhaust gas is low and in particular is below 5 percent by volume.
  • the amount of oxygen of the exhaust gas flowing through the main catalyst in the unfired overrun operating phase is less than or equal to the oxygen storage capacity of the main catalyst, or that the oxygen flowing through the main catalyst and at least one further catalyst of the exhaust gas aftertreatment system in the unfired overrun operating phase
  • the amount of oxygen in the exhaust gas is less than or equal to the oxygen storage capacity of the main catalytic converter and the at least one further catalytic converter, or that the main catalytic converter and all others are in the unfired overrun mode
  • the amount of oxygen flowing through the catalysts of the exhaust gas aftertreatment system is less than or equal to the oxygen storage capacity of the main catalyst and all other catalysts.
  • the amount of oxygen in the exhaust gas in the main catalytic converter in the unfired overrun mode is less than or equal to the oxygen storage capacity of the main catalytic converter.
  • Exhaust gas aftertreatment system located oxygen amount of the exhaust gas is less than or equal to the oxygen storage capacity of the main catalyst and the at least one further catalyst.
  • Exhaust gas aftertreatment system located oxygen amount of the exhaust gas less than or equal to the oxygen storage capacity of the main catalyst and all others
  • Exhaust gas aftertreatment system in particular the exhaust gas flowing through the main catalyst, is kept so low during the unfired overrun operating phase that the oxygen content within the scope of the oxygen storage capacity of the
  • the efficiency of the main catalytic converter or the main catalytic converters which in particular act as 3-way catalytic converters, is or are essentially unaffected during the overrun phase.
  • the 3-way catalytic converter and possibly all other exhaust gas components, which act in particular as a 3-way catalytic converter can be kept in the best possible condition for converting the pollutant components, so that the efficiency is kept at the greatest possible level at all times. This makes it possible to compare to conventional ones
  • the amount of oxygen of the exhaust gas flowing through the main catalytic converter in the unfired overrun operating phase is kept so low that the efficiency of the main catalytic converter, in particular the main catalytic converter acting as a 3-way catalytic converter, is unaffected, or that in the unfired overrun operating phase the main catalytic converter and at least one further catalyst flowing through the exhaust gas aftertreatment system
  • the amount of oxygen in the exhaust gas is kept so low that the efficiency of the main catalyst, in particular that of the 3-way catalyst
  • Main catalytic converter, and the at least one further catalytic converter is unaffected, so that in particular the overall efficiency of the exhaust gas aftertreatment system consisting of several elements is largely unaffected, or that the amount of oxygen in the exhaust gas flowing through the main catalyst and all other catalysts of the exhaust gas aftertreatment system in the unfired overrun mode is kept so low that the efficiency of the main catalytic converter, in particular the main catalytic converter acting as a 3-way catalytic converter, and all other catalytic converters is unaffected, so that the overall efficiency of the exhaust gas aftertreatment system consisting of several elements is largely unaffected.
  • the amount of oxygen in the exhaust gas in the main catalytic converter in the unfired overrun operating phase is kept so low that the efficiency of the main catalytic converter, in particular the main catalytic converter acting as a 3-way catalytic converter, is unaffected.
  • Exhaust gas aftertreatment system located oxygen quantity of the exhaust gas is kept so low that the efficiency of the main catalyst, in particular the main catalyst acting as a 3-way catalyst, and the at least one other catalyst is unaffected.
  • Exhaust gas aftertreatment system oxygen quantity of the exhaust gas is kept so low that the efficiency of the main catalyst, in particular the main catalyst acting as a 3-way catalyst, and all other catalysts is unaffected.
  • Exhaust gas aftertreatment system in particular the exhaust gas flowing through the main catalytic converter, is kept so low during the unfired overrun operating phase that no active strategy for emptying the oxygen store has to follow in order to enable sufficient efficiency, in particular 3-way conversion capability.
  • the amount of oxygen of the exhaust gas flowing through the main catalyst in the unfired overrun operating phase is kept so low that the transition from the overrun operating phase to the
  • Main catalyst is manufactured, or that in the unfired
  • Overrun phase of the main catalytic converter and at least one further catalytic converter in the exhaust gas aftertreatment system is kept low that the operation of the main catalytic converter, in particular the one acting as a 3-way catalytic converter, takes place due to the rich operation of the gasoline engine occurring during the transition from the overrun phase to the normal operating phase
  • Main catalyst, and the at least one further catalyst is produced, or that in the unfired overrun operating phase flowing through the main catalyst and all other catalysts of the exhaust gas aftertreatment system
  • the amount of oxygen in the exhaust gas is kept so low that the operation of the main catalytic converter, in particular the main catalytic converter acting as a 3-way catalytic converter, and all other catalytic converters is produced by the rich operation of the gasoline engine taking place during the transition from the overrun phase to the normal operating phase.
  • the amount of oxygen in the exhaust gas in the main catalytic converter in the unfired overrun operating phase is kept so low that the transition from the overrun operating phase to the
  • Main catalyst is produced.
  • Exhaust gas aftertreatment system oxygen quantity of the exhaust gas is kept so low that the operation of the main catalytic converter, in particular that acting as a 3-way catalytic converter, takes place due to the rich operation of the gasoline engine occurring during the transition from the overrun mode to the normal operating phase
  • Main catalyst, and the at least one further catalyst is produced.
  • Exhaust gas aftertreatment system located oxygen quantity of the exhaust gas is kept so low that by the transition from the overrun phase in
  • Exhaust gas treatment system in particular the exhaust gas flowing through the main catalytic converter, is kept so low during the unfired overrun operating phase that a reuse strategy with at least one short substoichiometric combustion phase is sufficient to restore or ensure the 3-way conversion capability.
  • Throttle valve upstream of the gasoline engine is
  • the air supply to the gasoline engine can be stopped by closing the throttle valve. This may make it possible in the unfired overrun mode by moving the cylinders before or during the transition to the unfired one
  • Exhaust gas generated during the overrun operation phase is circulated or pumped during the unfired overrun operation phase.
  • Overrun phase is closed. If necessary, it is provided that only the exhaust gas that was generated before or during the transition from the normal operating phase to the unfired overrun operating phase in the gasoline engine is supplied to the gasoline engine in the unfired overrun operating phase, or that
  • the gasoline engine In the unfired overrun operating phase, the gasoline engine is supplied exclusively with the exhaust gas via an exhaust gas recirculation line that was generated in the petrol engine before or during the transition from the fired overrun operating phase to the unfired overrun operating phase.
  • the gasoline is supplied to the gasoline engine in the entire unfired overrun operating phase via an exhaust gas recirculation line, which is before or during the transition from the normal operating phase to the unfired one
  • Thrust operation phase or that was generated in the gasoline engine before or during the transition from the fired overrun operation phase to the unfired overrun operation phase.
  • the gas conveyed by the gasoline engine in the unfired overrun operating phase has an oxygen content of less than 5% by volume or essentially zero, and / or that in the unfired
  • the overrun phase of the exhaust gas flowing through the gasoline engine is less than or equal to the oxygen storage capacity of the main catalytic converter, at least one further catalytic converter of the exhaust gas aftertreatment system and / or all
  • Catalysts of the exhaust gas aftertreatment system is unaffected, and / or that the gasoline engine flowing through in the unfired overrun operating phase
  • the amount of oxygen in the exhaust gas is kept so low that the operation of the main catalytic converter, in particular the main catalytic converter acting as a 3-way catalytic converter, of at least one further catalytic converter takes place due to the rich operation of the gasoline engine taking place during the transition from the overrun phase to the normal operating phase Exhaust aftertreatment system and / or all of the catalysts
  • the gasoline engine arrangement comprises a high-pressure EGR system with a high-pressure EGR line, and that the exhaust gas supplied to the gasoline engine in the unfired overrun operating phase is returned to the gasoline engine through the high-pressure EGR line.
  • the exhaust gas recirculation line may be designed as a high-pressure EGR line.
  • the exhaust gas supplied to the gasoline engine exits the high-pressure EGR line before the gasoline engine, and that the exhaust gas supplied to the gasoline engine enters the high-pressure EGR line between the gasoline engine and a turbine of a turbocharger of the gasoline engine.
  • Gasoline engine the exhaust gas generated before or during the transition to the unfired overrun operating phase is fed to the gasoline engine via a high-pressure EGR line.
  • the exhaust gas generated can enter the high-pressure EGR line between the gasoline engine and a turbine of the turbocharger and exit the high-pressure EGR line in front of the gasoline engine.
  • the exhaust gas generated can only be used in the unfired overrun mode
  • Thrust operating phase in the exhaust gas aftertreatment system essentially oxygen-free, exhaust gas remains, even during the unfired overrun operating phase in the exhaust gas aftertreatment system, in particular in the main catalytic converter.
  • the exhaust gas generated before or during the transition to the unfired overrun operating phase can be produced by the exhaust gas generated Combustion of fuel in the gasoline engine can be understood as low-oxygen, in particular essentially oxygen-free, exhaust gas.
  • the gasoline engine arrangement comprises a bypass line and that the exhaust gas supplied to the gasoline engine in the unfired overrun operating phase is returned to the gasoline engine through the bypass line.
  • the exhaust gas recirculation line may be designed as a bypass line.
  • the exhaust gas supplied to the gasoline engine exits the bypass line before the gasoline engine, the exhaust gas supplied to the gasoline engine entering the bypass line between the gasoline engine and a turbine of a turbocharger of the gasoline engine, or wherein the exhaust gas supplied to the gasoline engine between the main catalyst and another catalyst, especially one
  • Oxidation catalytic converter that enters the bypass line
  • Exhaust gas aftertreatment system enters the bypass line, or the exhaust gas supplied to the gasoline engine after the last catalytic converter
  • the exhaust gas generated before or during the transition to the unfired overrun operation phase can be removed via the bypass line
  • the generated exhaust gas can enter the bypass line directly after the gasoline engine or after an exhaust aftertreatment component of the exhaust aftertreatment system in the unfired overrun operating phase.
  • This can influence which components of the gasoline engine arrangement, that is to say which exhaust gas aftertreatment components in addition to the gasoline engine, are flowed through with the substantially oxygen-free exhaust gas generated in the unfired overrun operating phase.
  • the gasoline engine arrangement comprises a low-pressure EGR system with a low-pressure EGR line, and that the exhaust gas supplied to the gasoline engine in the unfired overrun mode is returned to the gasoline engine through the low-pressure EGR line.
  • the exhaust gas recirculation line may be designed as a low-pressure EGR line.
  • the exhaust gas supplied to the gasoline engine exits the low-pressure EGR line before the gasoline engine, the exhaust gas supplied to the gasoline engine entering the low-pressure EGR line between a turbine of a turbocharger of the gasoline engine and the main catalytic converter, or wherein this the
  • Main catalytic converter or an oxidation catalytic converter and another catalytic converter of the exhaust gas aftertreatment system enters the low-pressure EGR line
  • the exhaust gas generated before or during the transition to the unfired overrun operating phase can be fed to the gasoline engine and then preferably to the exhaust gas aftertreatment system via the low-pressure EGR line.
  • the exhaust gas generated can enter the low-pressure EGR line directly after the gasoline engine or after an exhaust gas aftertreatment component of the exhaust gas aftertreatment system in the unfired overrun mode. This can influence which components of the gasoline engine arrangement, that is to say which exhaust gas aftertreatment components in addition to the gasoline engine, are flowed through by the generated exhaust gas in the unfired overrun mode.
  • the exhaust gas aftertreatment system contains the main catalytic converter (s) and possibly one or more precatalysts and / or one or more secondary catalyst (s), in particular one or more oxidation catalyst (s), which have an oxidation catalyst coating
  • the optionally provided oxidation catalytic converter which includes an oxidation catalytic converter coating, the optionally provided gasoline engine particle filter, the optionally
  • the exhaust gas aftertreatment system has at least one main catalytic converter designed as a 3-way catalytic converter and / or acting as a 3-way catalytic converter, a gasoline engine particle filter and / or a NOx Storage catalytic converter comprises, where appropriate the main catalytic converter is arranged upstream of the gasoline engine particulate filter and the gasoline engine particulate filter upstream of the NOx storage catalytic converter, or the exhaust gas aftertreatment system consists of at least one designed as a 3-way catalytic converter and / or acting as a 3-way catalytic converter
  • Main catalytic converter is formed from a gasoline engine particle filter and / or from a NOx storage catalytic converter, the main catalytic converter possibly being arranged in front of the gasoline engine particle filter and the gasoline engine particle filter upstream of the NOx storage catalytic converter.
  • the exhaust gas aftertreatment system has at least one main catalyst and one downstream of the main catalyst that can be regenerated using oxygen and / or nitrogen dioxide
  • Gasoline engine particle filter includes that the exhaust gas aftertreatment system includes a feed line leading into the exhaust gas aftertreatment system, that in a regeneration operation via one or the feed line leading into the exhaust gas aftertreatment system upstream of the gasoline engine particle filter and oxygen
  • air preferably filtered ambient air
  • oxygen content of the gasoline engine particle filter is supplied for the regeneration of the gasoline engine particle filter
  • Exhaust gas flowing through the main catalytic converter or the exhaust gas located in the main catalytic converter in the regeneration mode is less than 5% by volume or essentially zero, and / or the oxygen quantity of the exhaust gas flowing through the main catalytic converter in the regeneration mode or the amount of oxygen in the main catalytic converter is kept as low as possible that the efficiency of the
  • the exhaust gas aftertreatment system comprises a NOx storage catalytic converter arranged downstream of the main catalytic converter and / or possibly the gasoline particle filter, that the exhaust gas aftertreatment system includes a feed line leading into the exhaust gas aftertreatment system, that during storage operation of the NOx storage catalytic converter the NOx storage catalytic converter via the into the exhaust gas aftertreatment system opening supply line oxygen and in particular air, preferably filtered and / or compressed ambient air, is fed that optionally an oxidation catalyst between the Main catalytic converter and the NOx storage catalytic converter is provided, and in that the oxidation catalytic converter comprises an oxidation catalytic converter coating, the oxygen content of the exhaust gas flowing through the main catalytic converter or of the exhaust gas located in the main catalytic converter in storage operation being less than 5% by volume or essentially zero, and / or wherein the amount of oxygen of the exhaust gas flowing through the main catalytic converter in the storage mode or the amount of oxygen of the exhaust gas located in the main catalytic converter is kept so
  • the exhaust gas aftertreatment system comprises an SCR catalytic converter arranged downstream of the main catalytic converter, the oxidation catalytic converter and / or the gasoline engine particle filter, that the SCR catalytic converter is optionally arranged upstream of the NOx storage catalytic converter, that the SCR catalytic converter is used to reduce the SCR catalytic converter Reduction of the nitrogen oxides via one or the supply line opening into the exhaust gas aftertreatment system, oxygen and in particular air, preferably ambient air, optionally filtered or compressed, is supplied, the oxygen content of the exhaust gas flowing through the main catalyst in the reduction mode being less than 5% by volume or in
  • Main amount of oxygen flowing through the main catalyst of the exhaust gas is kept so low that the efficiency of the main catalyst is unaffected.
  • Oxidation catalytic converter, the NOx storage catalytic converter and / or the SCR catalytic converter and / or a further catalytic converter is supplied with oxygen, in particular ambient air, via a supply line.
  • the gasoline engine particle filter, the oxidation catalytic converter, the NOx storage catalytic converter and / or the SCR catalytic converter and / or a further catalytic converter have oxygen, in particular via a separate supply line
  • a fuel in particular AdBlue®, is introduced into the exhaust gas aftertreatment system from a metering device upstream of the SCR catalytic converter, in particular after the oxidation catalytic converter, the fuel containing a reducing agent for nitrogen oxide reduction or being convertible into a reducing agent for nitrogen oxide reduction, and / or that a
  • Reducing agents for nitrogen oxide reduction are generated by the main catalytic converter, in particular by the 3-way catalytic converter, in the course of normal gasoline engine operation and / or by, if appropriate, temporarily adjusting the gasoline engine operating parameters of the gasoline engine, in particular by operating the gasoline engine under substoichiometric
  • the invention relates to a gasoline engine arrangement, wherein the
  • Gasoline engine assembly includes a gasoline engine and an exhaust gas aftertreatment system with at least one main catalyst, the gasoline engine in one
  • Overrun phase is formed by at least one unfired overrun phase and / or at least one fired overrun phase, and in which
  • the gas flowing through the main catalytic converter is low in oxygen, in particular essentially oxygen-free, and in particular the exhaust gas of a stoichiometric or sub-stoichiometric one, in particular
  • phased sub-stoichiometric combustion characterized in that an exhaust gas recirculation line is provided which supplies the gasoline engine with the exhaust gas generated before or during the transition from the normal operating phase to the unfired overrun control phase in the gasoline engine in an unfired overrun operation phase, or that an exhaust gas recirculation line is provided which Otto engine in an unfired overrun phase before or during the transition from the fired
  • Thrust operation phase feeds exhaust gas generated in the gasoline engine into the unfired overrun operation phase. If necessary, provision is made for the fuel supply to be stopped in the unfired overrun mode.
  • the overrun operation phase is fired by at least one unfired overrun operation phase and / or at least one
  • Thrust operation phase is formed, and that the gas flowing through the main catalytic converter in the fired overrun operation phase is essentially oxygen-free and in particular the exhaust gas of a stoichiometric or sub-stoichiometric
  • gasoline engine arrangement is set up to carry out the method according to the invention.
  • Coated oxidation catalyst is provided, or that one or
  • Gasoline engine particle filter with at least in its front area
  • Oxidation catalyst coating is provided, wherein the oxidation catalyst coating is set up to convert NO with O2 to NO2.
  • Main catalyst in particular in the front area of the main catalyst, a, in particular catalytically coated, heating element for heating the
  • Main catalytic converter is provided, and / or that after the gasoline engine, in particular after the main catalytic converter, and before the oxidation catalytic converter, in particular in the front region of the oxidation catalytic converter, one, in particular catalytically
  • a coated heating element is provided for heating the oxidation catalyst, and / or that after the gasoline engine, in particular after the oxidation catalyst, and in front of the gasoline engine particle filter, in particular in the front area of the gasoline engine particle filter, a, in particular catalytically coated, heating element is provided for heating the gasoline engine particle filter, and / or after
  • Gasoline engine in particular after the gasoline engine particle filter, and in front of a NOx storage catalytic converter, in particular in the front area of the NOx storage catalytic converter, a, in particular catalytically coated, heating element for heating the NOx storage catalytic converter is provided.
  • the gasoline engine arrangement has a gasoline engine and an exhaust gas aftertreatment system with at least the main catalytic converter, the
  • Main catalyst is designed as a 3-way catalyst or acts that
  • Main catalytic converter of the gasoline engine particle filter which optionally acts as a 4-way catalytic converter, is arranged downstream that the gasoline engine particle filter is followed by the NOx storage catalytic converter, and if necessary one or more
  • Oxidation catalyst is arranged in front of the NOx storage catalyst.
  • Exhaust gas flow direction is the last catalyst of the
  • FIG. 1 shows a schematic graphic representation of a first embodiment of a gasoline engine arrangement according to the invention
  • Gasoline engine 1 exhaust gas aftertreatment system 2, main catalytic converter 3, another exhaust gas aftertreatment component 4, turbocharger 5, throttle valve 6, compressor 7, turbine 8 and exhaust gas recirculation line 9.
  • the further exhaust gas aftertreatment component (s) 4 may optionally comprise a 3-way catalytic converter and / or a 4-way catalytic converter and / or a NOx storage catalytic converter or a 3-way catalytic converter and / or a 4-way catalytic converter and / or a NOx storage catalytic converter.
  • the exhaust gas aftertreatment system 2 has a
  • Main catalyst 3 and a 4-way catalyst includes.
  • the exhaust gas aftertreatment system 2 has a
  • Main catalyst 3 an oxidation catalyst and a 4-way catalyst includes.
  • the exhaust gas aftertreatment system 2 has a
  • Main catalyst 3 an oxidation catalyst, a 4-way catalyst and a NOx storage catalyst.
  • the exhaust gas aftertreatment system 2 has a
  • Main catalyst 3 a 4-way catalyst and a NOx storage catalyst.
  • the gasoline engine arrangement comprises a gasoline engine 1 and an exhaust gas aftertreatment system 2.
  • the exhaust gas aftertreatment system 2 comprises a main catalytic converter 3 and a subordinate to the main catalytic converter 3
  • the main catalytic converter 3 is designed as a 3-way catalytic converter and is arranged directly after the turbine 8 of the turbocharger 5, in particular close to the engine.
  • the further exhaust gas aftertreatment component 4 is in an embodiment variant of the first embodiment of the gasoline engine arrangement according to the invention
  • Embodiment of the gasoline engine arrangement according to the invention designed as a 4-way catalyst.
  • the gasoline engine arrangement comprises a turbocharger 5 and a throttle valve 6.
  • the turbocharger 5 comprises a compressor 7 and a turbine 8.
  • the gasoline engine arrangement is operated in an operating phase, which is a
  • Normal operating phase and an overrun phase includes.
  • Normal operating phase 1 fuel is supplied to the gasoline engine. In the normal operating phase, the fuel is converted with air to an exhaust gas. In the normal operating phase, the fuel is converted with air to an exhaust gas. In the normal operating phase, the fuel is converted with air to an exhaust gas.
  • the overrun phase comprises at least one unfired and / or at least one fired overrun phase.
  • the fuel supply to the gasoline engine 1 is only reduced and only that amount of fuel into the combustion chambers of the gasoline engine 1 introduced, which is required to convert the amount of oxygen introduced by the air into a substantially oxygen-free exhaust gas.
  • stoichiometric or substoichiometric combustion takes place in the combustion chambers of the gasoline engine 1.
  • Exhaust gas generated by gasoline engine 1 first flows through the turbine 8 of the turbocharger 5, then through the main catalytic converter 3 and then through the further catalytic converter
  • the fuel supply to the gasoline engine 1 is interrupted.
  • the exhaust gas generated before or during the transition to the unfired overrun operating phase is pumped in a circuit. This means that the exhaust gas generated before or during the transition to the unfired overrun operating phase enters the exhaust gas recirculation line 9 after the gasoline engine 1 and before the gasoline engine 1,
  • the essentially oxygen-free exhaust gas was generated in the normal operating phase or in the fired overrun operating phase.
  • the substantially oxygen-free exhaust gas generated before or during the transition to the unfired overrun operating phase is pumped in a circle by the cylinders of the gasoline engine 1 driven by the crankshaft during the unfired overrun operating phase.
  • the oxygen content of the exhaust gas located in the exhaust gas aftertreatment system 2, in particular in the main catalytic converter 3, essentially corresponds to the oxygen content of the engine during the unfired overrun mode
  • the exhaust gas aftertreatment system 2 is not flowed through and / or flooded with oxygen-containing exhaust gas during the unfired overrun operating phase.
  • the exhaust gas recirculation line 9 is designed as a high-pressure EGR line of a high-pressure EGR system of the gasoline engine arrangement.
  • Gasoline engine 1 stopped by closing the throttle valve 6. Furthermore, the exhaust gas recirculation line 9 remains or is opened by opening the exhaust gas recirculation valve.
  • the petrol engine 1 is thus during the unfired overrun phase
  • Exhaust gas aftertreatment system 2 can be avoided and / or reduced. It is preferably provided that the throttle valve 6 is completely closed or kept closed in the unfired overrun operating phase and that the suction and
  • exhaust gas that was generated before or during the transition from the normal operating phase to the unfired overrun operating phase in the gasoline engine 1 is fed back to the gasoline engine 1.
  • the exhaust gas supplied to the gasoline engine 1 in the unfired overrun operating phase was in the fired one
  • Fuel is generated with air and is essentially oxygen-free.
  • Gasoline engine arrangement which is suitable and / or set up for carrying out the method according to the invention.
  • the features of the embodiment according to FIGS. 2a, 2b and 2c can preferably correspond to the features of the embodiments according to FIG.
  • the exhaust gas recirculation line 9 is designed as a bypass line.
  • Gasoline engine 1 from the bypass line.
  • the substantially oxygen-free exhaust gas generated before or during the transition to the unfired overrun operating phase thus only flows through the gasoline engine 1 and the bypass line during the unfired overrun operating phase.
  • the exhaust gas generated before or during the transition to the unfired overrun operating phase enters the bypass line after the main catalytic converter 3 and exits the bypass line before the gasoline engine 1.
  • the substantially oxygen-free exhaust gas generated before or during the transition to the unfired overrun operating phase flows through during the unfired overrun operating phase So the gasoline engine 1, the turbine 8 of the turbocharger 5, the main catalyst 3 and the bypass line.
  • the exhaust gas generated before or during the transition to the unfired overrun operating phase enters the bypass line after the further main catalytic converter 3 and exits the bypass line before the gasoline engine 1.
  • the substantially oxygen-free exhaust gas generated before or during the transition to the unfired overrun operating phase flows through during the unfired
  • Thrust operation phase that is, the gasoline engine 1, the turbine 8 of the turbocharger 5, the main catalytic converter 3 and the further exhaust gas aftertreatment component 4 and the bypass line.
  • the exhaust gas generated before or during the transition to the unfired overrun operating phase enters the bypass line after the last catalytic converter of the exhaust gas aftertreatment system 2 and exits the bypass line before the gasoline engine 1.
  • the substantially oxygen-free exhaust gas generated before or during the transition to the unfired overrun operating phase thus flows through the exhaust during the unfired overrun operating phase
  • Exhaust aftertreatment components 4 of the exhaust aftertreatment system 2 and the bypass line are Exhaust aftertreatment components 4 of the exhaust aftertreatment system 2 and the bypass line.
  • 3a, 3b and 3c show schematic graphic representations of different variations of a third embodiment of an inventive
  • FIGS. 3a, 3b and 3c Gasoline engine arrangement which is suitable and / or set up for carrying out the method according to the invention.
  • the features of the embodiment according to FIGS. 3a, 3b and 3c can preferably correspond to the features of the embodiments according to FIG. 1, FIG. 2a, 2b and / or FIG. 2c.
  • the exhaust gas recirculation line 9 is designed as a low-pressure EGR line of a low-pressure EGR system of the gasoline engine arrangement.
  • the exhaust gas generated before or during the transition to the unfired overrun operating phase enters the low-pressure EGR line after the turbine 8 of the turbocharger 5 and exits the low-pressure EGR line before the gasoline engine 1.
  • Embodiment therefore flows through the essentially oxygen-free exhaust gas generated before or during the transition to the unfired overrun operating phase during the unfired overrun operating phase only the gasoline engine 1, the turbine 8 of the turbocharger 5 and the low-pressure EGR line.
  • the exhaust gas generated before or during the transition to the unfired overrun operating phase enters the low-pressure EGR line after the main catalytic converter 3 and exits the low-pressure EGR line before the gasoline engine 1.
  • the substantially oxygen-free exhaust gas generated before or during the transition to the unfired overrun operating phase flows through during the unfired
  • Thrust operation phase the gasoline engine 1, the turbine 8 of the turbocharger 5, the main catalytic converter 3 and the low-pressure EGR line.
  • the exhaust gas generated before or during the transition to the unfired overrun operating phase enters the low-pressure EGR line after the further exhaust-gas aftertreatment component 4 and exits the low-pressure EGR line before the gasoline engine 1.
  • the essentially oxygen-free exhaust gas generated before or during the transition to the unfired overrun operating phase thus flows through the gasoline engine 1, the turbine 8 of the turbocharger 5, the main catalytic converter 3, and the like during the unfired overrun operating phase
  • the exhaust gas generated before or during the transition to the unfired overrun operating phase occurs after the last one
  • the substantially oxygen-free exhaust gas generated before or during the transition to the unfired overrun operating phase thus flows through the gasoline engine 1, the turbine 8 during the unfired overrun operating phase of the turbocharger 5, all exhaust aftertreatment components 4 of the
  • the invention is not limited to the illustrated embodiments, but includes any method and any gasoline engine arrangement according to the

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un procédé et un système de moteur à allumage commandé, le moteur à allumage commandé (1) étant actionné dans une phase de fonctionnement comprenant une phase de fonctionnement normal et une phase de décélération, dans la phase de fonctionnement normal, du carburant et de l'air étant convertis en gaz d'échappement dans le moteur à allumage commandé, le moteur à allumage commandé (1) étant actionné, dans la phase de fonctionnement normal, de préférence dans une fenêtre de réglage lambda de λ=1, la phase de décélération se composant d'une phase de décélération sans combustion et/ou d'une phase de décélération avec combustion, dans la phase de décélération avec combustion, les gaz qui traversent ledit au moins un catalyseur principal (3) étant à teneur réduite en oxygène, essentiellement exempts d'oxygène, dans la phase de décélération sans combustion, les gaz d'échappement acheminés jusqu'au moteur à allumage commandé (1) par l'intermédiaire d'une conduite de retour de gaz d'échappement (9) étant ceux qui ont été produits dans le moteur à allumage commandé (1), avant ou après passage de la phase de fonctionnement normal à la phase de décélération sans combustion, ou, dans la phase de décélération sans combustion, les gaz d'échappement acheminés jusqu'au moteur à allumage commandé (1) par l'intermédiaire d'une conduite de retour de gaz d'échappement (9) étant ceux qui ont été produits dans le moteur à allumage commandé, avant ou lors du passage de la phase de décélération avec combustion à la phase de décélération sans combustion.
PCT/AT2019/060330 2018-10-05 2019-10-04 Procédé et système de moteur à allumage commandé à post-traitement amélioré des gaz d'échappement par une stratégie de coupure d'alimentation en poussée WO2020069550A1 (fr)

Priority Applications (2)

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CN201980061337.4A CN112771263A (zh) 2018-10-05 2019-10-04 通过滑行停喷策略改善废气处理功能的方法和汽油发动机总成
DE112019004982.8T DE112019004982A5 (de) 2018-10-05 2019-10-04 Verfahren und Ottomotoranordnung mit einer verbesserten Abgasnachbehandlung durch eine Schubabschaltungsstrategie

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ATA50856/2018 2018-10-05
ATA50856/2018A AT521758B1 (de) 2018-10-05 2018-10-05 Verfahren und Ottomotoranordnung mit einer verbesserten Abgasnachbehandlung durch eine Schubabschaltungsstrategie

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DE112019004982A5 (de) 2021-06-24
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