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WO2020069548A1 - Procédé et moteur à allumage commandé équipé d'un système scr amélioré - Google Patents

Procédé et moteur à allumage commandé équipé d'un système scr amélioré

Info

Publication number
WO2020069548A1
WO2020069548A1 PCT/AT2019/060328 AT2019060328W WO2020069548A1 WO 2020069548 A1 WO2020069548 A1 WO 2020069548A1 AT 2019060328 W AT2019060328 W AT 2019060328W WO 2020069548 A1 WO2020069548 A1 WO 2020069548A1
Authority
WO
WIPO (PCT)
Prior art keywords
catalytic converter
gasoline engine
exhaust gas
scr
main
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.)
Ceased
Application number
PCT/AT2019/060328
Other languages
German (de)
English (en)
Inventor
Peter GÖTSCHL
Kurt Prevedel
Peter Berger
Paul DR. KAPUS
Gernot Koller
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.)
AVL List GmbH
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
Priority claimed from ATA50859/2018A external-priority patent/AT521750A1/de
Priority claimed from ATA50861/2018A external-priority patent/AT521743B1/de
Application filed by AVL List GmbH filed Critical AVL List GmbH
Priority to CN201980061403.8A priority Critical patent/CN112805457A/zh
Priority to DE112019004959.3T priority patent/DE112019004959A5/de
Publication of WO2020069548A1 publication Critical patent/WO2020069548A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • 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
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • 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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/30—Arrangements for supply of additional air
    • 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
    • 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
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
    • 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
    • F01N2270/00—Mixing air with exhaust gases
    • 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
    • F01N2430/06—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1402—Exhaust gas composition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • 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
    • F01N3/101—Three-way catalysts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002—Controlling intake air
    • F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/07—Mixed pressure loops, i.e. wherein recirculated exhaust gas is either taken out upstream of the turbine and reintroduced upstream of the compressor, or is taken out downstream of the turbine and reintroduced downstream of the compressor
    • 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
  • Such SCR catalysts can be formed from titanium dioxide, vanadium pentoxide, tungsten dioxide, zeolites, in particular copper and iron zeolites, or activated carbon.
  • Reducing agent in particular ammonia NH3, is fed via a metering device.
  • the reducing agent can optionally be stored and / or stored at least temporarily in the SCR catalytic converter.
  • the ammonia may accumulate at the active centers of the SCR catalytic converter.
  • the at least temporarily stored reducing agent, in particular the ammonia NH3 can subsequently reduce nitrogen oxides NOx, such as in particular nitrogen monoxide NO and nitrogen dioxide NO2.
  • the filter walls of the exhaust gas filter can consist of different porous materials and can be constructed from fibers or powder, for example.
  • the fibers or the powder itself consist in particular of ceramics or of metals.
  • Classic ceramics are mullite, cordierite, silicon carbide (SiC) and aluminum titanate.
  • Diesel arrangements are known to regenerate the exhaust gas filter at a
  • soot loading is required to prevent excessive back pressure or undesired temperature peaks that could damage the component if the soot burns up
  • regeneration the terms are used in the context of the invention, that is to say for a gasoline engine, as follows: Every regeneration with oxygen is referred to as active regeneration in the context of the invention, even if an active engine intervention to reduce soot particles is not necessarily provided. Subsequently a regeneration with NO2 is also referred to as a passive regeneration in the ottomotor context.
  • Gasoline engine particle filter i.e. an oxidation of the carbon by the introduction of oxygen, is easier.
  • the other hand compared to conventional diesel arrangements in conventional gasoline engine arrangements, the
  • Oxygen is available for active regeneration of the gasoline engine particulate filter.
  • the object of the invention is to overcome the disadvantages of the prior art.
  • Immission ambient air limit values to reduce or reduce Furthermore, it is an object of the invention to store or implement by-product and intermediate product of catalytic reactions, such as, for example, NH3 which may be formed, in the catalysts. In particular, it is an object of the invention to overcome the disadvantages of
  • the invention relates to a method for operating a gasoline engine arrangement, the gasoline engine arrangement comprising a gasoline engine and a gasoline engine
  • Exhaust gas aftertreatment system comprises, the exhaust gas aftertreatment system comprises at least one main catalytic converter and an SCR catalytic converter arranged downstream of the main catalytic converter, fuel and air being converted into exhaust gas in a normal operating phase in the gasoline engine.
  • the SCR catalytic converter in the reduction mode of the SCR catalytic converter, is used to reduce the nitrogen oxides via a
  • 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 largely unaffected.
  • the gasoline engine arrangement can be the gasoline engine arrangement
  • the SCR catalytic converter may be at a position in the
  • Exhaust aftertreatment system positioned in which the exhaust gas temperature when entering the SCR catalytic converter is lower than when it exits the gasoline engine.
  • the SCR catalytic converter is arranged downstream of the main catalytic converter (designed as a 3-way catalytic converter) and a gasoline engine particle filter and upstream of a NOx storage catalytic converter. It is favorable if the NOx storage catalytic converter is the last element of the exhaust gas aftertreatment system.
  • An oxidation catalytic converter can additionally be provided between the main catalytic converter and the gasoline engine particle filter, it being possible for this to be designed as part of the gasoline particle filter.
  • the exhaust gas aftertreatment system can include the main catalytic converter (s) and the SCR catalytic converter and optionally one or more precatalyst (s) and / or one or more secondary catalysts, in particular one or more oxidation catalysts, which have an oxidation catalyst coating
  • ⁇ comprises / s, and / or one or more heating catalytic converter (s) and / or one or more gasoline particle filters / / and / or one or more NOx storage catalytic converter (s) and / or one or more exhaust gas aftertreatment component (s), in particular coated / gaseously effective with exhaust gas aftertreatment , which comprise a NOx storage catalytic converter coating, and / or comprise one or more SCR systems and / or one or more exhaust gas aftertreatment component / s, which comprise an SCR coating, and / or comprise a secondary air injection.
  • the exhaust gas aftertreatment system can consist of the main catalytic converter (s) and the SCR catalytic converter 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), which comprises an oxidation catalytic converter coating / s, and / or one or more heating catalyst (s) and / or one, in particular one or more gaseous exhaust gas aftertreatment, gasoline engine particle filter / s and / or one or more NOx storage catalyst (s) and / or one or more
  • the exhaust gas generated in the gasoline engine flows through the main catalytic converter and then through the SCR catalytic converter of the exhaust gas aftertreatment system.
  • oxygen and in particular air preferably ambient air, optionally filtered or compressed, is supplied to the SCR catalytic converter via a supply line.
  • air preferably ambient air, optionally filtered or compressed
  • the SCR catalytic converter can convert the nitrogen oxides emitted by the gasoline engine into nitrogen and water if the SCR catalytic converter or the exhaust gas flowing through the SCR catalytic converter is one
  • Has temperature which is greater than a reduction temperature, in particular greater than the NOx light off temperatures corresponding to the technology, preferably greater than 170 ° C.
  • Nitrogen dioxide NO2 is present in the exhaust gas and the reduction temperature is in the range of 170 ° C to 300 ° C, a so-called “fast SCR reaction” can take place.
  • the fast SCR reaction essentially follows the following rule:
  • the SCR catalyst has the reducing agent required for the reactions, in particular ammonia Nhh, via a
  • Dosing device in so-called active form, or as part of normal petrol engine operation and / or by changing the mode of operation of the gasoline engine, in a so-called passive form.
  • Exhaust aftertreatment system always supply an essentially oxygen-free or low-oxygen exhaust gas.
  • the measures according to the invention make it possible to always keep the 3-way catalytic converter in a functional window and, at the same time, to further reduce emissions by operating the SCR catalytic converter. This is achieved in particular by supplying air to the SCR catalytic converter downstream of the 3-way catalytic converter.
  • the oxygen content of the exhaust gas flowing through the main catalytic converter or of the exhaust gas located in the main catalytic converter and / or the optionally present pre- or secondary or heating catalytic converters can be less than 5% by volume or essentially zero.
  • the amount of oxygen in the exhaust gas flowing through the main catalytic converter or the amount of oxygen in the main catalytic converter and / or possibly pre- or secondary or heating catalytic converter can be kept so low that the efficiency of the
  • Heating catalyst is largely unaffected and independent of the reduction operation of the SCR catalyst, so that at any time a sufficiently high, preferably the largest possible, pollutant emission conversion rate
  • the main catalytic converter, the main catalytic converters or the main catalytic converter (s) and the further exhaust gas aftertreatment components normally have, before the feed line flows into the exhaust gas aftertreatment system. as in the reduction mode, a high, preferably the best possible, efficiency.
  • 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.
  • the method is carried out automatically, in particular in a control unit of a motor vehicle and / or controlled and / or regulated by a control unit of a motor vehicle.
  • the reduction operation is ended after the SCR catalytic converter has completely or at least partially converted the nitrogen oxides contained in the exhaust gas.
  • the normal operating phase which essentially corresponds to the regular operating mode of the gasoline engine arrangement or gasoline engine, fuel and air are introduced into the combustion chamber of at least one cylinder of the gasoline engine and converted to exhaust gas by combustion.
  • the gasoline engine is optionally operated in a manner oscillating around a lambda value l of 1.0, and in particular is 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 becomes.
  • 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 degree of conversion of the pollutants by the exhaust gas aftertreatment components should be ensured in total. This can be a sufficiently high
  • Pollutant emission conversion level falls below the threshold value, below which there is no longer a sufficiently high pollutant emission reduction. If necessary, it is provided that the
  • Pollutant emission conversion degree threshold is as large as possible, especially in an area as close as possible to 100%.
  • the exhaust gas generated by the gasoline engine is essentially oxygen-free in the normal operating phase and at most contains only small amounts of oxygen. It can be provided that the gasoline engine is operated in the reduced mode of the SCR catalytic converter as in the normal operating phase.
  • the SCR catalyst converts nitrogen monoxide NO to nitrogen N2 and water H2O in the reduction mode, this reaction essentially taking place according to the following regulation:
  • the SCR catalyst converts nitrogen monoxide NO and nitrogen dioxide NO2 to nitrogen N2 and water H2O, this reaction essentially according to the following regulation expires:
  • the oxygen volume flow or air volume flow supplied to the SCR catalytic converter, in particular unidirectionally, through the supply line is controlled or regulated, in particular via a supply valve.
  • a device regulating or preventing the introduction of air in particular a supply valve, can be provided, with which the supply of oxygen, in particular the supply of air, can be controlled and / or regulated by the supply line.
  • a safety device such as a Check valve or a membrane, contains in order to prevent possible escape of the exhaust gas through the supply line into the environment in any case.
  • an operating fluid is introduced from a metering device upstream of the SCR catalytic converter into the exhaust gas aftertreatment system, the operating fluid containing a reducing agent for nitrogen oxide reduction or in one
  • Reducing agent for nitrogen oxide reduction can be implemented, and / or that one
  • Reducing agents for nitrogen oxide reduction are generated by the main catalytic converter, in particular by the 3-way catalytic converter, in the context of normal gasoline engine operation and / or by, if necessary, temporarily adjusting the gasoline engine operating parameters of the gasoline engine, in particular by operating the gasoline engine at substoichiometric levels.
  • an operating fluid is introduced into the exhaust gas aftertreatment system from a dosing device upstream of the SCR catalytic converter is to be understood in such a way that it is already in the exhaust gas aftertreatment system and is not supplied externally, as is known, for example, in diesel engines.
  • Nitrogen oxide reduction is generated by the main catalytic converter, in particular by the 3-way catalytic converter, in the course of normal gasoline engine operation, in particular by the gasoline engine being operated at substoichiometric levels.
  • NH3 is generated as a waste product in the 3-way catalytic converter, which means that no active addition of urea is necessary.
  • the SCR catalytic converter is therefore operated passively: no urea has to be added, since it is generated by motor and / or regenerated.
  • Operating fluid such as in particular a mixture containing urea, a urea solution or AdBlue®, is metered in before the SCR catalytic converter in a so-called active way.
  • the operating material can contain a reducing agent, such as, in particular, ammonia NH3, or can be converted into a reducing agent, such as, in particular, NH3.
  • a urea-containing mixture in particular a urea-water solution, such as AdBlue®, is preferably used as the operating medium, the
  • the operating material is converted into the reducing agent, in particular NH3, by the reactions shown below:
  • the urea (NH2) 2CO can be converted into ammonia NH3 and isocyanic acid HNCO during the thermolysis reaction.
  • the isocyanic acid HNCO can be converted into ammonia NH3 and carbon dioxide CO2 with water H2O in the hydrolysis reaction.
  • the reducing agent in particular NH3, can optionally be stored and / or stored at least temporarily in the SCR catalytic converter.
  • the ammonia may accumulate at the active centers of the SCR catalytic converter.
  • the at least temporarily stored reducing agent, in particular the ammonia NH3 can subsequently reduce nitrogen oxides NOx, such as in particular nitrogen monoxide NO and nitrogen dioxide NO2.
  • the operating fluid can be dosed via a dosing device, in particular via an injector or an injection nozzle.
  • the gasoline engine is operated in such a way that it generates a reducing agent, in particular hydrogen H2.
  • the hydrogen H2 produced can be converted with the nitrogen monoxide NO generated in the main catalyst, in particular in a 3-way catalyst, to ammonia NH3 and water H2O essentially according to the following regulation: 2 NO + 5 H 2 -> 2 NH 3 + 2 H 2 0
  • Reducing agent for nitrogen oxide reduction in particular ammonia Nhh, without a metering device, in a so-called passive way, only by the gasoline engine and the main catalytic converter.
  • the exhaust gas aftertreatment system contains the main catalytic converter (s) and the SCR catalytic converter 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) which are an oxidation catalytic converter Coating comprises / s, and / or one or more heating catalytic converter (s) and / or one or more, in particular gaseous exhaust gas aftertreatment, gasoline engine particle filter and / or one or more NOx storage catalytic converter (s) and / or one or more
  • the oxygen and in particular the air are fed to the SCR catalytic converter in its reduction mode via the feed line which leads after the main catalytic converter, in particular after a 3-way catalytic converter, and before the SCR catalytic converter into the exhaust gas aftertreatment system, or that Oxygen and especially the air in the SCR catalyst
  • Reduction mode is fed via the feed line leading into the exhaust gas aftertreatment system in front of a gasoline engine particle filter and upstream of the SCR catalytic converter, or that the oxygen and in particular the air in the reduction mode is fed to the SCR catalytic converter in the reduction mode via the after a gasoline engine particle filter and before the SCR catalyst into the exhaust gas aftertreatment system
  • Feed line is supplied.
  • the air is filtered and / or compressed
  • ambient air is supplied to the SCR catalytic converter in the reduction mode and that the ambient air from the environment enters the supply line, in particular unidirectionally. Furthermore, the ambient air can be upstream of the SCR catalytic converter and after the main catalytic converter
  • Gasoline engine particle filter from the supply line or before the gasoline engine particle filter and before the SCR catalytic converter and after the main catalytic converter from the
  • ambient air is supplied to the SCR catalytic converter in the reduction mode, that the ambient air from the environment,
  • Gasoline engine particle filter exits the supply line, or the air exits the supply line before the gasoline engine particle filter and before the SCR catalytic converter and after the main catalytic converter.
  • ambient air can flow through the supply line and then through the SCR catalytic converter.
  • non-compressed air in particular non-compressed ambient air, enters the supply line and exits the supply line before the SCR catalytic converter, in particular after the main catalytic converter.
  • the ambient air is drawn in automatically by the exhaust gas flow present in the exhaust gas aftertreatment system
  • one end of the feed line opens into the surroundings, in particular outside the exhaust gas aftertreatment system, and the other end into the exhaust gas aftertreatment system.
  • a suppression can be present in the exhaust gas aftertreatment system or arise when exhaust gas is flowed through the exhaust gas aftertreatment system. It can thus be possible that air from the surroundings is sucked into the exhaust gas aftertreatment system, in particular upstream of the SCR catalytic converter, through the supply line, in particular automatically, by means of this suppression.
  • the ambient air can enter the venturi nozzle
  • Exhaust gas treatment system are introduced. If appropriate, it is provided that the exhaust gas aftertreatment system in the area in which the exhaust gas aftertreatment system is provided. If appropriate, it is provided that the exhaust gas aftertreatment system in the area in which the exhaust gas aftertreatment system is provided.
  • Feed line opens into the exhaust gas aftertreatment system when a Venturi nozzle is formed.
  • air in particular air compressed by a turbocharger of the gasoline engine, is fed to the SCR catalytic converter, that the air between a compressor and a charge air cooler of the turbocharger or between a charge air cooler of the turbocharger and the gasoline engine into the
  • Feed line enters, wherein the air after the main catalyst and / or optionally after the gasoline engine particulate filter and before the SCR catalyst exits the feed line, or wherein the air after the main catalyst and if necessary, upstream of the gasoline engine particle filter and upstream of the SCR catalytic converter and out of the supply line.
  • air compressed by the compressor of the turbocharger enters the feed line after the compressor of the turbocharger and exits the feed line before the SCR catalytic converter, in particular after the main catalytic converter.
  • the exhaust gas and / or the air supplied in the reduction mode are heated by a heating element, that the heated air flows through the SCR catalytic converter and then through the SCR catalytic converter, and that the
  • Heating element is provided in front of the SCR catalytic converter.
  • a heating element for heating the SCR catalytic converter is provided after the gasoline engine and before the SCR catalytic converter, in particular in the front area of the SCR catalytic converter
  • a heating element is provided for heating the gasoline engine particle filter and / or that after the gasoline engine and in front of the main catalytic converter, in particular in the front area of the main catalytic converter
  • Heating element for heating the main catalyst is provided and / or that after the gasoline engine and before the secondary catalyst, in particular in the front area of the secondary catalyst, a heating element is provided for heating the secondary catalyst, the respective heating element itself preferably being catalytically actively coated.
  • the heating element or the heating elements can be powered by the vehicle electrical system, which in particular has a nominal voltage of 12 volts or 48 volts. If appropriate, it is provided that in front of each exhaust gas aftertreatment component of the exhaust gas aftertreatment system, in particular in the front area
  • At least one heating element is provided.
  • the respective catalysts can reach the temperature (light-off temperature) required for their efficient function earlier.
  • a heating element to be provided in front of the SCR catalytic converter in order to be able to heat the SCR catalytic converter quickly to its functional temperature, particularly when the internal combustion engine is cold started, and thus to reduce or prevent the emission of NOx emissions. Since the SCR catalytic converter generally requires a significantly lower temperature to function than the 3-way catalytic converter, the NOx emissions emitted by the gasoline engine can be absorbed by the SCR catalytic converter during a cold start
  • the heating elements and the heating of the individual catalysts which is made possible thereby can be used for their desulfurization.
  • the gasoline engine arrangement is in an operating phase, the normal operating phase, possibly a coasting operating phase, and the
  • Main 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
  • gasoline engine in the unfired overrun operating phase is supplied with the exhaust gas via an exhaust gas recirculation line that was generated before or during the transition from the normal operating phase to the unfired overrun operating phase in the gasoline engine, or where
  • Exhaust gas recirculation line is supplied, which was generated in the gasoline engine before or during the transition from a fired coasting phase to the unfired coasting phase. If appropriate, it is provided that the oxygen content of the exhaust gas located in the main catalyst or that the oxygen content of the exhaust gas flowing through the main catalyst in the unfired overrun operating phase essentially corresponds to the oxygen content of the exhaust gas flowing through the main catalyst in the normal operating phase or in the fired overrun operating phase.
  • Main catalytic converter optionally a gasoline engine particle filter, the SCR catalytic converter and optionally a NOx storage catalytic converter arranged downstream of the SCR catalytic converter, the regeneration mode of the
  • air preferably filtered and / or compressed ambient air
  • the NOx storage catalytic converter is supplied with oxygen and in particular air, preferably filtered and / or compressed ambient air, via one or the supply line leading into the exhaust gas aftertreatment system, is fed.
  • the SCR catalytic converter in its reduction mode and / or the NOx storage catalytic converter in its storage mode.
  • the oxygen which supplies the gasoline engine particle filter, the SCR catalytic converter and the NOx storage catalytic converter is provided.
  • Particle loading of the exhaust gas back pressure exceeds an exhaust gas back pressure threshold value at which the exhaust gas emission is severely hampered and in particular potentially long-term damage-relevant component limit values of the engine or the exhaust gas aftertreatment system are exceeded.
  • the monitoring of the loading condition as well as the initiation and control of the regeneration of the gasoline engine particle filter can be done by the engine control of the
  • Oxidation catalytic converter, the NOx storage catalytic converter and / or the SCR 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 have their own
  • Exhaust gas flowing through the main catalyst or the exhaust gas located in the main catalyst is less than 5% by volume or essentially zero, and / or that if
  • Oxygen in particular air, is introduced into the exhaust gas aftertreatment system, the oxygen quantity of the exhaust gas flowing through the main catalyst or the oxygen quantity of the exhaust gas located in the main catalyst being kept so low that the efficiency of the main catalyst is unaffected.
  • the operating material is introduced via the metering device after the oxidation catalytic converter and before the SCR catalytic converter.
  • the invention relates to a gasoline engine arrangement, wherein the
  • Gasoline engine arrangement comprises a gasoline engine and an exhaust gas aftertreatment system, the exhaust gas aftertreatment system having a main catalytic converter and one
  • Main catalyst includes downstream SCR catalyst, being in one
  • the gasoline engine arrangement comprising a supply line which opens into the exhaust gas aftertreatment system and in particular can be flowed through unidirectionally, and the gasoline engine arrangement is set up to carry out the method according to the invention.
  • the supply line opens into the exhaust gas aftertreatment system upstream of the SCR catalytic converter
  • the supply line branches off between a compressor and a charge air cooler of a turbocharger of the gasoline engine, or wherein the supply line branches off between a charge air cooler of a turbocharger of the gasoline engine and the gasoline engine, or wherein the supply line branches off between the air filter and a compressor of a turbocharger of the gasoline engine, or wherein the Feed line to
  • the supply line opens into the exhaust gas aftertreatment system upstream of the SCR catalytic converter, the supply line comprising a blower which is fed from the intake tract and / or ambient air, and / or the supply line being a pressure accumulator, in particular one
  • a controllable and / or regulatable blower for conveying the oxygen, in particular for conveying the air, along the
  • blower can be used as
  • Secondary air pump be designed as an electrical compressor or mechanical compressor. It is optionally provided that the supply line opens into the exhaust gas aftertreatment system in front of the SCR catalytic converter and / or that the supply line for introducing air from the environment outside the gasoline engine arrangement to the ambient air, in particular unidirectionally, in the direction of the
  • Exhaust gas aftertreatment system is open, and / or that the ambient air is automatically drawn into the exhaust gas aftertreatment system by the exhaust gas flow present in the exhaust gas aftertreatment system and / or that the ambient air is introduced into the exhaust gas aftertreatment system via a venturi nozzle.
  • a controllable and / or adjustable blower and / or a pressure accumulator is / are provided along the supply line.
  • the blower can fill the pressure reservoir, continuously or discontinuously, which in turn serves as an oxygen reservoir, in particular an air reservoir.
  • the pressure accumulator can be in the supply line between the fan and the mouth of the supply line in the
  • Exhaust aftertreatment system is arranged.
  • the gasoline engine particle filter is uncoated or as a 2-way catalytic converter or as a 3-way catalytic converter or as a 4-way catalytic converter, or that the gasoline engine particle filter is not a catalytic converter or a 2-way catalytic converter or a 3-way catalytic converter -Catalyst or includes a 4-way catalyst.
  • gasoline engine particle filter is uncoated in its embodiment and is only set up to filter particles.
  • gasoline engine particle filter is set up to filter particles and additionally, or in combination, hydrocarbons,
  • gasoline engine particle filter is designed as a 2, 3 or 4-way catalytic converter.
  • the gasoline engine particle filter comprises the SCR catalytic converter, the SCR catalytic converter being arranged in the rear region of the gasoline engine particle filter, and / or that a coating acting as SCR catalyst, such as, in particular, vanadium, an iron zeolite, or on the gasoline engine particle filter a copper zeolite is provided, the coating acting as an SCR catalyst preferably in the flow direction of the exhaust gas from the rear of the
  • Petrol engine particle filter is applied.
  • Gasoline engine particle filter an oxidation catalyst coated with an oxidation catalyst coating is provided, or that the gasoline engine particle filter is provided at least in its front area with an oxidation catalyst coating, the oxidation catalyst coating being 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
  • coated heating element is provided for heating the oxidation catalyst, and / or that after the gasoline engine, in particular after the oxidation catalyst, and before 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
  • a front area of an exhaust gas aftertreatment component is to be understood as the area which is in
  • Flow direction of the exhaust gas in the respective exhaust aftertreatment component is flowed through earlier by the exhaust gas.
  • this can be the area through which the exhaust gas enters the respective exhaust gas aftertreatment component.
  • a rear area is one
  • Flow direction of the exhaust gas in the respective exhaust gas aftertreatment component is later flowed through by the exhaust gas.
  • this can be the area through which the exhaust gas emerges from the respective exhaust gas aftertreatment component.
  • 1 a, 1 b, 1 c, 1 d, 1 e, 1f, 1 g and 1 h show a schematic graphic representation of different variants of a first embodiment of the gasoline engine arrangement according to the invention
  • 2a, 2b, 2c and 2d show a schematic graphic representation of different variants of a second embodiment of the invention
  • FIG. 3 shows a schematic diagram of a third embodiment of the gasoline engine arrangement according to the invention.
  • 4a and 4b show a schematic graphic representation of different variants of a fourth embodiment of the gasoline engine arrangement according to the invention.
  • Gasoline engine 1 exhaust gas aftertreatment system 2, fluff catalyst 3,
  • Gasoline engine particle filter 4 Turbocharger 5, throttle valve 6, compressor 7, turbine 8, exhaust gas recirculation line 9, NOx storage catalytic converter 10, venturi nozzle 11, supply valve 12, charge air cooler 13, supply line 14, SCR catalytic converter 15, further main catalytic converter 16, metering device 17, heating element 18, filter device 19, safety device 20, pressure accumulator 21 and blower 22.
  • 1 a, 1 b, 1 c, 1 d, 1 e, 1f, 1 g and 1 h show schematic graphical representations of different variants of a first embodiment of a gasoline engine arrangement according to the invention, which is suitable and / or set up for carrying out the method according to the invention .
  • 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 an SCR catalytic converter 15 arranged downstream of the main catalytic converter 3.
  • the main catalytic converter 3 is designed as a 3-way catalytic converter and is connected directly thereafter arranged on the turbine 8 of the turbocharger 5, in particular close to the engine.
  • the exhaust gas aftertreatment system 2 comprises a main catalytic converter 3, a gasoline engine particle filter 4 arranged downstream of the main catalytic converter 3, and one Gasoline engine particle filter 4 downstream SCR catalytic converter 15 and optionally a NOx storage catalytic converter 10 downstream of the SCR catalytic converter 15.
  • the gasoline engine arrangement of FIGS. 1 a, 1 b, 1 c, 1 d, 1 e, 1f, 1 g and 1 h comprises a turbocharger 5 and a throttle valve 6.
  • the turbocharger 5 comprises one
  • the gasoline engine arrangement compared to the gasoline engine arrangement of FIG. 1 a additionally comprises an exhaust gas recirculation line 9, namely a flock pressure EGR line of a high pressure EGR system.
  • Normal operating phase is operated in phases or permanently rich or lean and / or regulated.
  • the exhaust gas emitted by the gasoline engine 1 in the normal operating phase is essentially oxygen-free.
  • the gasoline engine 1 is operated in the reduction mode of the SCR catalytic converter 15 essentially the same as in the normal operating phase. That means that also in
  • the exhaust gas emitted by the gasoline engine 1 is essentially oxygen-free.
  • the oxygen quantity of the exhaust gas flowing through the main catalyst 3 during the reduction operation of the SCR catalyst 15 or the oxygen quantity of the exhaust gas located in the main catalyst 3 is so small that the efficiency of the main catalyst 3 is essentially unaffected.
  • the effectiveness, in particular the efficiency, of the main catalytic converter 3 is in particular of the 3-way catalytic converter, essentially the same before and after the reduction operation of the SCR catalytic converter 15.
  • Exhaust gas flowing through the main catalytic converter 3 or the exhaust gas located in the main catalytic converter 3 during the reduction operation of the SCR catalytic converter 15 is less than 5% by volume or is essentially zero.
  • oxygen in particular air, is supplied to the SCR catalytic converter 15 through a supply line 14 according to this embodiment.
  • the supply line 14 opens before the SCR catalytic converter 15 into the exhaust gas aftertreatment system 2 and branches off between the compressor 7 and the charge air cooler 13 of the turbocharger 5.
  • the oxygen and in particular the air in the reduced mode of the SCR catalytic converter 15 is air compressed by a turbocharger 5 of the gasoline engine 1. Furthermore, the compressed air after the compressor 7 and before the charge air cooler 13 of the turbocharger 5 enters the supply line 14 and after the main catalytic converter 3 and before the SCR catalytic converter 15 from the supply line 14.
  • a device regulating or preventing the introduction of air namely a supply valve 12, is provided, with which the oxygen supply, in particular the air supply, is controlled and / or regulated by the supply line 14.
  • the gasoline engine 1 generates both in the normal operating phase and in
  • Reduction operation of the SCR catalytic converter 15 through the conversion of fuel to an exhaust gas This exhaust gas first flows through the turbine 8 of the turbocharger 5 and then through the exhaust gas aftertreatment components of the exhaust gas aftertreatment system 2 before it exits into the environment.
  • the nitrogen oxides contained in the exhaust gas are partially or completely converted to water and nitrogen in or on the SCR catalytic converter 15.
  • the reducing agent, the ammonia, for the reduction of the nitrogen oxides in the SCR catalytic converter 15 is generated by the 3-way catalytic converter.
  • the gasoline engine 1 is operated such that the gasoline engine 1 generates hydrogen, for example.
  • the hydrogen generated is then converted to ammonia in a 3-way catalyst with nitrogen monoxide.
  • a dosing device 17 for dosing the operating material can be provided in this variant.
  • the operating material is introduced into the exhaust gas aftertreatment system 2 via a metering device 17 upstream of the SCR catalytic converter 15.
  • the supply line 14 opens before the gasoline engine particle filter 4, which includes the SCR catalytic converter 15, into the exhaust gas aftertreatment system 2.
  • the SCR catalytic converter 15 is in the rear region of the
  • the coating acting as an SCR catalytic converter 15 is in the flow direction of the exhaust gas from the rear of the
  • an NOx storage catalytic converter 10 is additionally arranged after the SCR catalytic converter 15 or the gasoline engine particle filter 4, which comprises the SCR catalytic converter 15.
  • a further flaking catalytic converter 16 and a gasoline engine particle filter 4 are arranged between the flaking catalytic converter 3 and the SCR catalytic converter 15.
  • a fleece element 18 is arranged in front of the fluff catalyst 3.
  • a fleece element 18 is arranged in front of the SCR catalytic converter 15.
  • 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, 2c and 2d can preferably correspond to the features of the embodiments according to FIGS. 1 a, 1 b, 1 c, 1 d, 1 e, 1 f, 1 g and 1 h.
  • Reduction operation of the SCR catalytic converter 15, necessary oxygen, in particular the air, is introduced into the exhaust gas aftertreatment system 2 through a venturi nozzle 11.
  • a feed valve 12 is arranged on the feed line 14 and is used to regulate the amount of oxygen and to the SCR catalytic converter 15
  • Fig. 3 shows a schematic representation of a third embodiment of a gasoline engine arrangement according to the invention, which for performing the
  • the features of the embodiment according to FIG. 3 can preferably match the features of FIG Embodiments according to Figures 1 a, 1 b, 1 c, 1 d, 1 e, 1f, 1 g, 1 h, 2a, 2b, 2c and 2d correspond.
  • the exhaust gas aftertreatment system 2 comprises a main catalytic converter 3, a gasoline engine particle filter 4 and an SCR catalytic converter 15.
  • the ambient air filtered by a filter device 19 is introduced into the exhaust gas aftertreatment system 2 via a Venturi nozzle 11. Furthermore, a feed valve 12 and a safety device 20 are on the feed line 14
  • FIGS. 4a and 4b show schematic representations of different variants of a fourth embodiment of a gasoline engine arrangement according to the invention which is suitable and / or set up for carrying out the method according to the invention.
  • the features of the embodiment according to FIGS. 4a and 4b can preferably correspond to the features of the embodiments according to FIGS. 1a, 1b, 1c, 1d,
  • the exhaust gas aftertreatment system 2 comprises a main catalytic converter 3, a further main catalytic converter 16, a gasoline engine particle filter 4 and an SCR catalytic converter 15.
  • the filtered ambient air is optionally introduced into a pressure accumulator 21 or directly into the exhaust gas aftertreatment system 2 by a fan 22, which in this embodiment is designed as an electrical compressor 7.
  • Exhaust gas treatment system 2 are introduced.
  • the ambient air is extracted from the intake tract
  • 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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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
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  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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  • Toxicology (AREA)
  • Processes For Solid Components From Exhaust (AREA)
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Abstract

L'invention concerne un procédé permettant de faire fonctionner un système de moteur à allumage commandé et un système de moteur à allumage commandé, ledit système de moteur à allumage commandé comprenant un moteur à allumage commandé (1) et une installation de post-traitement de gaz d'échappement (2), l'installation de post-traitement des gaz d'échappement (2) comprenant un catalyseur principal (3) et un catalyseur SCR (15) monté en aval du catalyseur principal (3) et, dans une phase de fonctionnement normal, du carburant et de l'air étant convertis en gaz d'échappement dans le moteur à allumage commandé (1), en mode de réduction du catalyseur SCR (15), de l'oxygène et en particulier de l'air étant acheminé par l'intermédiaire d'une conduite d'alimentation (14) débouchant dans l'installation de post-traitement des gaz d'échappement (2) jusqu'au catalyseur SCR (15) pour assurer la réduction des oxydes d'azote, la teneur en oxygène des gaz d'échappement qui traversent le catalyseur principal (3, en mode de réduction, étant inférieure à 5% en volume ou sensiblement égale à zéro dans le mode de réduction, et/ou la quantité d'oxygène des gaz d'échappement qui traversent le catalyseur principal (3), en mode de réduction, étant maintenue à un niveau suffisamment bas pour que le rendement du catalyseur principal (3) demeure inchangé.
PCT/AT2019/060328 2018-10-05 2019-10-04 Procédé et moteur à allumage commandé équipé d'un système scr amélioré Ceased WO2020069548A1 (fr)

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CN201980061403.8A CN112805457A (zh) 2018-10-05 2019-10-04 具有改进的scr系统的汽油发动机总成和方法
DE112019004959.3T DE112019004959A5 (de) 2018-10-05 2019-10-04 Verfahren und Ottomotoranordnung mit einem verbesserten SCR-System

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ATA50859/2018A AT521750A1 (de) 2018-10-05 2018-10-05 Verfahren und Ottomotoranordnung mit einem verbesserten NSC-System
ATA50861/2018 2018-10-05
ATA50859/2018 2018-10-05
ATA50861/2018A AT521743B1 (de) 2018-10-05 2018-10-05 Verfahren und Ottomotoranordnung mit einem verbesserten SCR-System

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113550813A (zh) * 2020-04-26 2021-10-26 长城汽车股份有限公司 一种氮氧化物转化方法、装置及车辆
WO2023001863A1 (fr) * 2021-07-21 2023-01-26 Umicore Ag & Co. Kg Système de gaz d'échappement permettant de purifier des gaz d'échappement d'un moteur à essence
DE102021212931A1 (de) 2021-11-17 2023-05-17 Volkswagen Aktiengesellschaft Brennkraftmaschine mit elektrisch beheizbarer Abgasnachbehandlungsvorrichtung
US12247505B2 (en) 2021-07-21 2025-03-11 Umicore Ag & Co. Kg Exhaust gas purification system for purifying exhaust gases of internal combustion engines
US12410741B2 (en) 2021-07-21 2025-09-09 Umicore Ag & Co. Kg Exhaust gas purification system for purifying exhaust gases of gasoline engines

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013209379A1 (de) * 2012-05-25 2013-11-28 Ford Global Technologies, Llc Abluftinjektion
DE102013209374A1 (de) * 2012-05-25 2013-11-28 Ford Global Technologies, Llc Abluftinjektion
US8776498B2 (en) * 2008-04-16 2014-07-15 Ford Global Technologies, Llc Air-injection system to improve effectiveness of selective catalytic reduction catalyst for gasoline engines
EP2933449A1 (fr) * 2014-04-15 2015-10-21 General Electric Company Système de post-traitement d'échappement avec surveillance de désactivation catalytique
US9453443B2 (en) * 2009-03-20 2016-09-27 Basf Corporation Emissions treatment system with lean NOx trap
DE102015212846A1 (de) * 2015-07-09 2017-01-12 Volkswagen Aktiengesellschaft Vorrichtung und Verfahren zur Abgasnachbehandlung einer Brennkraftmaschine
US20170167337A1 (en) * 2015-12-11 2017-06-15 Hyundai Motor Company Exhaust purification system and control method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8776498B2 (en) * 2008-04-16 2014-07-15 Ford Global Technologies, Llc Air-injection system to improve effectiveness of selective catalytic reduction catalyst for gasoline engines
US9453443B2 (en) * 2009-03-20 2016-09-27 Basf Corporation Emissions treatment system with lean NOx trap
DE102013209379A1 (de) * 2012-05-25 2013-11-28 Ford Global Technologies, Llc Abluftinjektion
DE102013209374A1 (de) * 2012-05-25 2013-11-28 Ford Global Technologies, Llc Abluftinjektion
EP2933449A1 (fr) * 2014-04-15 2015-10-21 General Electric Company Système de post-traitement d'échappement avec surveillance de désactivation catalytique
DE102015212846A1 (de) * 2015-07-09 2017-01-12 Volkswagen Aktiengesellschaft Vorrichtung und Verfahren zur Abgasnachbehandlung einer Brennkraftmaschine
US20170167337A1 (en) * 2015-12-11 2017-06-15 Hyundai Motor Company Exhaust purification system and control method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113550813A (zh) * 2020-04-26 2021-10-26 长城汽车股份有限公司 一种氮氧化物转化方法、装置及车辆
WO2023001863A1 (fr) * 2021-07-21 2023-01-26 Umicore Ag & Co. Kg Système de gaz d'échappement permettant de purifier des gaz d'échappement d'un moteur à essence
US12188392B2 (en) 2021-07-21 2025-01-07 Umicore Ag & Co. Kg Exhaust gas system for purifying exhaust gases of gasoline engine
US12247505B2 (en) 2021-07-21 2025-03-11 Umicore Ag & Co. Kg Exhaust gas purification system for purifying exhaust gases of internal combustion engines
US12410741B2 (en) 2021-07-21 2025-09-09 Umicore Ag & Co. Kg Exhaust gas purification system for purifying exhaust gases of gasoline engines
DE102021212931A1 (de) 2021-11-17 2023-05-17 Volkswagen Aktiengesellschaft Brennkraftmaschine mit elektrisch beheizbarer Abgasnachbehandlungsvorrichtung

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