AT521759A1 - Process and gasoline engine arrangement with improved exhaust gas aftertreatment through a regeneration strategy - Google Patents

Abstract

The invention relates to a method and a gasoline engine arrangement, the gasoline engine arrangement comprising a gasoline engine (1) and an exhaust gas aftertreatment system (2), the exhaust gas aftertreatment system (2) using at least one main catalyst (3) and one downstream of the main catalyst (3), using oxygen and / or nitrogen dioxide regenerable gasoline engine particle filter (4), with fuel and air being converted to exhaust gas in a normal operating phase in the gasoline engine (1), in a regeneration mode via a feed line (14) leading into the exhaust gas aftertreatment system (2) in front of the gasoline engine particle filter ( 4) Oxygen and in particular air, preferably filtered ambient air, are supplied for regeneration of the gasoline engine particle filter (4), the oxygen content of the exhaust gas flowing through the main catalyst (3) or of the exhaust gas located in the main catalyst (3) in the regeneration mode being less than 5 vol. % or in Wese is essentially zero, and / or wherein the oxygen quantity of the exhaust gas flowing through the main catalyst (3) during regeneration operation or the oxygen quantity of the exhaust gas located in the main catalyst (3) is kept so low that the efficiency of the main catalyst (3) is unaffected.

Description

Process and gasoline engine arrangement with improved exhaust gas aftertreatment through a regeneration strategy

The invention relates to a method and a gasoline engine arrangement according to the preambles of the independent claims.

Different methods for operating an internal combustion engine are known from the prior art.

According to the prior art, methods for operating a diesel or gasoline engine are known, in which the particle-laden exhaust gas is filtered when penetrating a porous filter wall of an exhaust gas filter. During the filtration process, particles are retained by the filter medium of the exhaust gas filter and are deposited on it.

The filter walls of the exhaust gas filter can consist of different porous materials and can be constructed, for example, of fibers or powder. 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.

Due to the deposition of the particles on the surface or inside the filter wall, a particle layer - a so-called filter cake - which affects the filtration is formed, which on the one hand leads to a further improvement in the filtration efficiency, which is preferably the best possible without any loading, on the other hand the flow resistance and thus also the differential pressure generated by the exhaust gas volume flow at the exhaust gas filter.

In conventional methods, when a differential pressure threshold value is reached or, for example, when a threshold value of a particle mass modeled in the engine control unit, in particular a modeled soot mass, is reached, regeneration of the exhaust gas filter is initiated. The engine control unit can thus predict or determine the particle mass on the filter wall of the exhaust gas filter and a regeneration when a particle mass threshold value is reached

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AVL List GmbH. In conventional methods, regeneration is initiated at the latest when the particle loading of the exhaust gas filter causes an exhaust gas back pressure that is above an exhaust gas back pressure threshold value, at which exhaust gas emissions are severely hindered, and in particular at which potentially sustainable damage-related component limit values of the engine or the exhaust gas aftertreatment system are exceeded.

Too high a soot load in the exhaust gas filter can, in extreme cases, lead to thermal, mechanical and thermomechanical loads, in particular when the exhaust gas filter is being regenerated, and possibly limit the aging resistance and robustness of the exhaust gas aftertreatment components of the exhaust gas aftertreatment system, in particular the exhaust gas filter, and should therefore be avoided.

The exhaust gas filter is regenerated by the at least partial combustion or oxidation of the combustible components of the deposited particles. In order to achieve regeneration conditions, several methods are known in a conventional diesel arrangement, which require specific temperature ranges and a supply of oxygen to the exhaust filter, in particular for the combustion or oxidation of the carbon in the exhaust filter.

In a known method for a conventional diesel arrangement, the temperature in the exhaust gas filter is actively increased in order to oxidize the carbon with the excess oxygen from the stoichiometric combustion. For this so-called active regeneration, the regeneration of the diesel engine particle filter with O2, exhaust gas filter temperatures of preferably over 500 ° C. are required. The regeneration of the exhaust gas filter takes place here by the combustion of or of parts of the combustible components of the deposited particles.

Another known method in a conventional diesel arrangement works in the normal temperature range of the exhaust gas filter, the stored carbon being oxidized by means of nitrogen dioxide. This so-called passive regeneration

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Regeneration of the diesel engine particle filter with NO2 can be effective at exhaust gas filter temperatures of less than 600 ° C., in particular less than 500 ° C., preferably between 200 ° C. and 500 ° C.

It is state of the art that exhaust gas filters, so-called gasoline engine particle filters, are also used in gasoline engine arrangements for the purpose of reducing particle emissions.

The use of synergies between a gasoline engine and a diesel engine is described below. In contrast to a diesel engine, in a gasoline engine there is no NO2 as a regeneration agent in the particle filter (here gasoline particle filter). Although the usual terminology in diesel engines refers to regeneration with oxygen-active regeneration and regeneration with NO2 as passive 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 considered active regeneration in the context of the invention referred to, even if there is not necessarily an active engine intervention to reduce soot particles. Subsequently, regeneration with NO2 is also referred to as passive regeneration in the ottomotor context.

Also in the gasoline engine assembly, as already known from conventional diesel assemblies, regeneration of the exhaust gas filter with a correspondingly high soot load is necessary in order to be able to reduce or prevent excessive counterpressure or undesired temperature peaks in the particulate filter in the event of the soot burning up. Since a gasoline engine arrangement has a significantly lower particle emissions level in combination with a significantly higher exhaust gas temperature level in comparison to a diesel arrangement, regeneration is less necessary in the gasoline engine arrangement.

In conventional gasoline engine arrangements, on the one hand, the exhaust gas temperature is higher than in conventional diesel arrangements, which leads to a thermally oxidative regeneration, a so-called active regeneration, of the gasoline engine particle filter, that is to say an oxidation of the carbon by the introduction of

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Oxygen, easier is possible. On the other hand, compared to conventional diesel arrangements in conventional gasoline engine arrangements, the stoichiometric normal operation produces less oxygen, which means that significantly less oxygen is available for active regeneration of the gasoline engine particle filter.

Furthermore, methods are known in which the fuel supply to the gasoline engine is intentionally temporarily interrupted by a so-called overrun fuel cutoff if the gasoline engine is not to deliver any power. These processes are mainly used to save fuel and reduce CO2 emissions in overrun mode.

In conventional processes, the exhaust gas aftertreatment system, in particular the exhaust gas aftertreatment component, such as, for example, an exhaust gas filter, is flushed with the air pumped by the gasoline engine in these overrun phases or in the event of load gaps. If the temperature of the exhaust gas filter, of the exhaust gas flowing through the exhaust gas filter and / or of the particles located in the exhaust gas filter is above a regeneration temperature, in particular above 500 ° C., preferably above 600 ° C., the exhaust gas filter is regenerated. However, conditions damaging the gasoline engine particle filter can occur here, since very high combustion reaction speeds and exothermic thermal peaks can occur, which must be reduced or prevented in the sense of component protection due to thermal voltages and absolute temperature levels.

Furthermore, under certain conditions in the operation of a gasoline engine arrangement, in particular in the winter short-distance operation of the vehicle, it can occur that the thermally regenerative and / or oxidatively relevant overrun phases in which the gasoline engine particle filter can be flushed or actively regenerated with oxygen, in particular air, not sufficient to burn or oxidize the soot stored in the filter, in particular completely. This can lead to a continuous build-up of soot accumulation in the gasoline engine particle if no other regeneration measures are initiated. It should be mentioned here that it is far for reasons mentioned above

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AVL List GmbH is more advantageous to avoid large loads from the start through continuous regeneration.

In conventional gasoline engine arrangements, oxygen quantities relevant for the active regeneration of the gasoline engine particle filter can only get into the exhaust gas filter in unfired overrun phases. Passive regeneration of the gasoline engine particulate filter with nitrogen dioxide has a subordinate effect in conventional gasoline engine arrangements, since on the one hand too small amounts of nitrogen dioxide are generated by conventional gasoline engines and, on the other hand, depending on the arrangement of the exhaust gas filter in the exhaust gas aftertreatment system, the temperature in the exhaust gas filter may be too high, depending on the arrangement, to deal with these regenerations -Make use of mechanism.

In other words, a slower-running, in particular continuous, passive regeneration, in particular with nitrogen dioxide, at lower temperatures, as is known from a conventional diesel arrangement, is only subordinate to negligible in an Otto engine arrangement due to the comparatively small amounts of nitrogen dioxide in the gasoline-engine exhaust gas.

In summary, the use of an exhaust gas filter in a gasoline engine arrangement brings with it new challenges with regard to filter regeneration.

The object of the invention is to overcome the disadvantages of the prior art. In particular, it is an object of the invention to provide a method and a gasoline engine arrangement which enables regeneration of the exhaust gas filter in operating phases, in particular in continuously defined sections of low burn-off exothermic peaks, in which, with conventional methods, no or only insufficient soot regeneration of the exhaust gas filter is possible. Furthermore, it is an object of the invention to provide a method and a gasoline engine arrangement which enables targeted regeneration of the exhaust gas filter even under conditions in which little or no oxygen, in particular as a result of too short or too little or no unfired overrun phases, reaches the exhaust gas filter. In addition, it is an object of the invention to prevent the gasoline engine particle filter from operating

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AVL List GmbH is exposed to high particle loads and the associated thermal, mechanical and thermomechanical stress risks, particularly during regeneration, and to protect the gasoline engine from the exhaust gas back pressure, which is damaging to the gasoline engine particle filter, and the associated back pressure damage risks. Among other things, it is an object of the invention to increase the resistance to aging and the so-called functional robustness of the gasoline engine particle filter. This means that the regeneration of the gasoline engine particle filter on the one hand should not significantly reduce the filtration efficiency of the gasoline engine particle filter and on the other hand the gaseous conversion efficiency, in particular the efficiency, of the other exhaust gas aftertreatment components, in particular the 3-way catalytic converter, is essentially unaffected or at a sufficiently high level, in particular as large as possible. Furthermore, it is therefore an object of the invention to come closer to the so-called vision of "zero impact emission", in order to provide the end customer with a gasoline engine arrangement that is economical in terms of fuel consumption, and on the other hand to protect the environment, in particular as far as possible, by falling below the pollutant emission laws prescribed by the legislator, especially the prescribed particle emissions.

The object of the invention is achieved in particular by the features of the independent claims.

The invention relates to a method for operating a gasoline engine arrangement, the gasoline engine arrangement comprising a gasoline engine and an exhaust gas aftertreatment system, the exhaust gas aftertreatment system comprising at least one main catalytic converter and a gasoline engine particle filter that can be regenerated downstream of the main catalytic converter using oxygen and / or nitrogen dioxide, and wherein in a normal operating phase fuel and air are converted into exhaust gas in the gasoline engine.

According to the invention, it is provided that in a regeneration operation via a feed line leading into the exhaust gas aftertreatment system upstream of the

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Gasoline engine particle filter Oxygen and in particular air, preferably filtered ambient air, is supplied for regeneration of the gasoline engine particle filter, 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 regeneration mode being less than 5% by volume or essentially zero, and / or the oxygen quantity of the exhaust gas flowing through the main catalyst during the regeneration operation or the oxygen quantity of the exhaust gas located in the main catalyst being kept so low that the efficiency of the entire exhaust system, in particular of the main catalyst, is unaffected.

The gasoline engine arrangement can be the gasoline engine arrangement of an internal combustion engine, in particular the gasoline engine arrangement of a motor vehicle.

The gasoline engine arrangement comprises a gasoline engine and an exhaust gas aftertreatment system. The exhaust gas aftertreatment system comprises at least one main catalytic converter and a gasoline engine particle filter, which is arranged downstream of the main catalytic converter and can be regenerated using oxygen or nitrogen dioxide.

The regeneration operation can be superimposed on a normal operation, in particular the normal operating phase, preferably as required in the sense of maintaining the functionality of the gasoline engine particle filter.

According to a preferred embodiment, a filter device, which is designed to filter the air, is provided and / or arranged on the supply line. This may make it possible for only filtered air to be introduced into the exhaust gas aftertreatment system via the supply line.

According to a preferred embodiment, the feed line comprises a safety device which prevents the exhaust gas from escaping and / or escaping into the surroundings, so that no exhaust gas can escape into the surroundings via the feed line. In particular, it must be ensured that the

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Supply line is designed such that the exhaust gas aftertreatment system is flowed through unidirectionally in the direction of the exhaust gas aftertreatment system.

Furthermore, the exhaust gas aftertreatment system can include the main catalytic converter (s) and the gasoline engine particle filter 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. and / or one or more heating catalytic converter (s) and / or one or more, in particular gaseous exhaust gas aftertreatment-coated, gasoline engine particle filters and / or one or more NOx storage catalytic converter (s) and / or one or more exhaust gas aftertreatment component (s) which have a NOx storage catalytic converter coating comprise, and / or one or more SCR system (s) and / or one or more exhaust aftertreatment component (s), which comprise an SCR coating, and / or comprise a secondary air injection.

Furthermore, the exhaust gas aftertreatment system can consist of the main catalytic converter (s) and the gasoline engine particle filter 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 , and / or one or more heating catalytic converter (s) and / or one or more gasoline particle filters / n and / or one or more NOx storage catalytic converter (s) and / or one or more exhaust gas aftertreatment component (s) which are coated with a gaseous exhaust gas aftertreatment treatment Coating comprises / s, and / or one or more SCR systems / / and / or one or more exhaust gas aftertreatment component / s, which comprises an SCR coating / s, and / or a secondary air injection.

In particular, the exhaust gas generated in the gasoline engine flows through the main catalytic converter or the main catalytic converters and the gasoline engine particle filter of the exhaust gas aftertreatment system. The particles emitted by the gasoline engine, in particular the soot emitted by the gasoline engine and / or the ash emitted by the gasoline engine, become

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AVL List GmbH filtered by the gasoline engine particle filter. The gasoline engine particle filter is loaded with the particles emitted by the gasoline engine.

If necessary, the cleaning residue and / or the particle separation capacity of the gasoline engine particle filter is increased by the particle residue formed from the retained particles during the filtration on the gasoline engine particle filter, as a result of which the gasoline engine particle filter preferably has the largest possible basic filtration efficiency defined by the substrate and coating. Furthermore, after a certain particle loading, in particular after a so-called base loading, which is preferably as low as possible, the gasoline engine particle filter preferably has its greatest possible normal filtration efficiency. In addition, a so-called filter cake can form in the gasoline engine particle filter, in particular if the gasoline engine particle filter is loaded with large particles or large amounts of ash.

In the context of the present invention, the particle residue is the particle residue formed from the retained particles during filtration on the gasoline engine particle filter. In particular, the gasoline engine particle filter has its normal filtration efficiency with a particle loading of over 0 g / l, for example with over 0.1 g / l, in particular with a particle loading in the range between 0.1 g / l and 3 g / l.

The gasoline engine arrangement can be operated in the normal operating phase, which represents the regular operating mode of the gasoline engine arrangement and the gasoline engine, and in regeneration mode.

In the normal operating phase, 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. In the normal operating phase, the gasoline engine can preferably be operated and / or regulated in a lambda window by λ = 1. This means that the gasoline engine is optionally operated in a manner oscillating around a lambda value λ of 1.0 and in particular is operated and / or regulated with a lambda value λ in the range from 0.9 to 1.1, preferably from 0.95 to 1.05 becomes. It can be provided that the

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In its normal operating phase, the gasoline engine is operated and / or regulated in phases or permanently below or above stoichiometric or rich or lean, provided that the exhaust gas aftertreatment components of the gasoline engine arrangement permit a sufficiently high, in particular the best possible, raw emissions conversion under these conditions.

This means, if necessary, that both in the normal operating phase and in the regeneration operation a sufficient, preferably the greatest possible, degree of conversion of the pollutants should be ensured by the exhaust gas aftertreatment components. This enables a sufficiently high reduction in pollutants in both operating phases. In particular, it is provided that the degree of pollutant emission conversion of the exhaust gas aftertreatment system never falls below a threshold value for pollutant emission conversion, below which there is no longer a sufficiently high reduction in pollutant emissions. If appropriate, it is provided that the threshold value for the conversion of pollutant emissions is as large as possible, in particular in a range as close as possible to 100%.

In particular, partial over-stoichiometric operation is in no way recommended because of the reduced NOx conversion capacity in the catalytic converters in these areas and should therefore be avoided.

In particular, it is provided that 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.

If necessary, the regeneration in the normal operating phase, in particular the soot oxidation processes, takes place only slowly or not at all. The slowdown is usually due to the lower oxygen content, in particular to the lower amount of oxygen, which flows through the gasoline engine particle filter in the normal operating phase. The lower the amount of oxygen introduced per unit of time, the slower we can

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Provision can preferably be made to operate the gasoline engine in regeneration mode, in particular during the regeneration of the gasoline engine particle filter, as in the normal operating phase.

In regeneration mode, in particular in the regeneration mode of the gasoline engine particle filter or in the regeneration mode of the gasoline engine arrangement, oxygen and in particular filtered ambient air are fed to the gasoline engine particle filter via a supply line. The supply line opens into the exhaust gas aftertreatment system. The feed line preferably opens into the exhaust gas aftertreatment system upstream of the gasoline engine particle filter.

This means that oxygen and, in particular, filtered ambient air can flow through the supply line and then through the gasoline engine particle filter in the regeneration mode.

In particular, it is provided that ambient air, in particular non-compressed and filtered ambient air, enters the supply line and exits the supply line before the gasoline engine particle filter, in particular after the main catalytic converter or after the main catalytic converters.

The gasoline engine particle filter is regenerated in regeneration mode, preferably by supplying oxygen from ambient air through the supply line, if the gasoline engine particle filter itself, the exhaust gas flowing through the gasoline engine particle filter and / or the particles in the gasoline engine particle filter are at or have a temperature which is greater than a regeneration temperature. especially greater than 500 ° C, especially greater than 600 ° C. The combustible constituents of the particles, which have accumulated in the gasoline engine particle filter, can be completely or partially burned. The regeneration, in particular through the combustion of the particles, reduces the load on the gasoline engine particle filter.

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The regeneration operation, in particular the regeneration request, can be triggered like in conventional methods, for example as a function of the modeled amount of soot or by the differential pressure.

An easy-to-measure parameter that allows the soot load of the filter to be recognized is the differential pressure before and after the exhaust filter or the pressure upstream of the exhaust filter. Since this pressure information varies as a function of engine speed, load condition and amount of load, in conventional methods these parameters are recorded in a map, in particular in an exhaust filter map. Another measurable parameter, which also provides information about the amount of soot in the exhaust gas filter, is a model-based value calculated in the control unit, which corresponds to loading quantity information, the model-based value, for example, from the combination of the information from a raw particle mass emission model in front of the filter, a filtration efficiency model and a regeneration / Burn-up model is calculated and / or determined in the filter. Values for a differential pressure depend on the concept, component, filter and / or load.

If necessary, the active initiation of regeneration of the gasoline engine particulate filter in the gasoline engine arrangement is also necessary at the latest if the particle loading causes the exhaust gas back pressure to exceed an exhaust gas backpressure threshold value at which the exhaust gas emissions are severely hampered and, in particular, potentially sustainable damage-relevant component limit values of the engine or the exhaust gas aftertreatment system are exceeded.

The monitoring of the loading state and the initiation and control of the regeneration of the gasoline engine particle filter can be carried out by the engine control of the internal combustion engine, in particular by the control unit of the internal combustion engine.

It can be provided that the gasoline engine particle filter is regenerated only during the regeneration operation.

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During the regeneration operation, the oxygen content of the exhaust gas flowing through the main catalyst or of the exhaust gas located in the main catalyst can be less than 5% by volume or essentially zero.

During the regeneration operation, the amount of oxygen in the exhaust gas flowing through the main catalyst or the amount of oxygen in the exhaust gas located in the main catalyst can be kept so low that the efficiency of the main catalyst is unaffected, so that a sufficiently high, preferably maximum, pollutant emission conversion rate of the exhaust gas aftertreatment components is ensured at all times .

In particular, the main catalytic converter, the main catalytic converters or the main catalytic converter (s) and the further exhaust gas aftertreatment components have a high, preferably the best possible, efficiency in normal as well as in the regeneration mode before the feed line flows into the exhaust gas aftertreatment system.

As a result, it may be possible to regenerate the gasoline engine particle filter without flooding the exhaust gas aftertreatment system, in particular the main catalytic converter, with oxygen. The efficiency of the main catalytic converter, especially the 3-way catalytic converter, can be unaffected by the regeneration of the gasoline engine particulate filter. This means that the efficiency of the main catalytic converter, in particular the 3-way catalytic converter, is preferably not reduced by the regeneration of the gasoline engine particle filter. It is preferably provided that only the gasoline engine particle filter and possibly exhaust gas aftertreatment components located behind it in the flow direction are flowed through with oxygen-containing gas, in particular with ambient air, in regeneration mode.

In the context of the present invention, the at least one main catalytic converter or the main catalytic converter means one or more catalytic converter (s), in particular several main catalytic converters, which have essentially the same effect and / or function. If appropriate, the at least one main catalyst comprises one or more catalysts, in particular one or more

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AVL List GmbH several primary or secondary catalysts and / or one or more heating catalysts. If appropriate, 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 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.

If necessary, the regeneration operation is ended after a complete and preferably largely partial regeneration of the gasoline engine particle filter. The regeneration operation is preferably ended, so that the filtration efficiency of the gasoline engine particle filter is ensured.

It may be provided that in the normal operating phase the exhaust gas from the gasoline engine is fed to the main catalytic converter, that the main catalytic converter is designed or acts as a 3-way catalytic converter and that the gasoline engine is preferably operated or regulated in a lambda window by λ = 1 in its normal operating phase.

It is optionally provided that the NO of the exhaust gas is converted to NO2 in an oxidation catalytic converter using the oxygen introduced through the supply line.

The oxidation catalytic converter can be arranged in front of the gasoline engine particle filter in the exhaust gas aftertreatment system or can be provided on the front area of the gasoline engine particle filter. It is preferably provided that the oxygen introduced through the supply line flows through the oxidation catalytic converter before or upon entering the gasoline engine particle filter.

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The oxidation catalytic converter is set up to convert nitrogen monoxide NO with oxygen O2 to nitrogen dioxide NO2. This means that the oxidation catalyst may generate NO2 as soon as NO and O2 are fed to it and the oxidation catalyst has the temperature necessary for this reaction.

It is optionally provided that the exhaust gas first flows through the main catalyst, then a secondary catalyst, in particular the oxidation catalyst and then the gasoline engine particle filter, or that the exhaust gas first flows through the main catalyst and then at the same time through the oxidation catalyst and the gasoline engine particle filter.

In particular, it is provided that the main catalytic converter comprises a heating catalytic converter and a pre-catalytic converter, the exhaust gas preferably first flowing through the heating catalytic converter, then the pre-catalytic converter, then the main catalytic converter, then the secondary catalytic converter, which can be designed as an oxidation catalytic converter, and finally through the gasoline particulate filter.

If, in one embodiment, the oxidation catalytic converter is a separate exhaust gas component of the exhaust gas aftertreatment system, the exhaust gas can first flow through the main catalytic converter, then the oxidation catalytic converter and then the gasoline engine particle filter.

If, in one embodiment, the oxidation catalyst is part of the gasoline engine particle filter and is provided in particular on the front area of the gasoline engine particle filter, the exhaust gas can first flow through the main catalyst and then simultaneously through the oxidation catalyst and the gasoline engine particle filter.

If, in one embodiment, the oxidation catalytic converter is a separate exhaust gas component of the exhaust gas aftertreatment system, the supplied oxygen, in particular the supplied air, can flow first through the oxidation catalytic converter and then through the gasoline engine particle filter.

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If, in one embodiment, the oxidation catalytic converter is part of the gasoline engine particle filter and is provided in particular on the front area of the gasoline engine particle filter, the oxygen supplied, in particular the air supplied, can simultaneously flow through the oxidation catalyst and the gasoline engine particle filter.

It is optionally provided that the oxidation catalyst has an oxidation catalyst coating or that the oxidation catalyst is a gasoline engine particle filter provided at least in its front area with an oxidation catalyst coating, the oxidation catalyst coating comprising a platinum metal, such as in particular platinum, rhodium and / or palladium and wherein NO or O2 is converted to NO2 in or on the oxidation catalyst coating.

The oxidation catalyst can have an oxidation catalyst coating. The oxidation catalyst coating comprises an element of the platinum metals or platinoids or is formed from an element of the platinum metals or platinoids. In English, platinum metals or platinoids are also referred to as platinum group metals.

The oxidation catalytic converter can be an independent exhaust gas aftertreatment component or a gasoline engine particle filter provided at least in its front area with an oxidation catalytic converter coating. This means that the gasoline engine particle filter may include the oxidation catalytic converter.

Preferably, NO or O2 is converted to NO2 in or on the oxidation catalyst coating.

It is further provided that the oxidation catalyst coating is set up to convert nitrogen monoxide NO with oxygen O2 to nitrogen dioxide NO2. As a result, NO2 is generated in or on the oxidation catalyst coating as soon as

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AVL List GmbH this NO and O2 is supplied. The conversion of nitrogen monoxide with oxygen to nitrogen dioxide essentially takes place according to the following rule:

NO + - 0 ₂ - + N0 ₂

Furthermore, this oxidation catalyst coating can be set up to convert any NH3 that may be formed with O2 to NOx as a by-product and intermediate product of catalytic reactions in the catalysts in the presence of CO. This implementation is essentially based on the following rule:

4NH ₃ + (3 + 2x) 0 ₂ - + 4N0 _x + 6H ₂ O where x = {1,2}

In particular, the oxidation catalyst can minimize or reduce any NHs formed with oxygen. The resulting reaction products, in particular the nitrogen oxides, can then be fed to a, preferably the best possible, effective NOx aftertreatment, such as a NOx storage catalytic converter.

If necessary, it is provided that the NO2 formed is converted to CO2 and NO with the particles stored in the gasoline engine particle filter, the reaction taking place in particular in accordance with the following regulation:

2NO ₂ + C 2 NO + C0 ₂

The generated nitrogen dioxide NO2 makes it possible to at least partially oxidize the soot particles located in the gasoline engine particle filter, in particular the carbon C. This may make it possible to passively regenerate the gasoline engine particulate filter.

In particular, it can be provided that the gasoline engine particle filter is at least partially regenerated as soon as NO2 is introduced into the gasoline engine particle filter and the gasoline engine particle filter has the regeneration temperature necessary for the regeneration.

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In terms of sustainability, it can be provided that the nitrogen oxides NO generated during passive regeneration are post-treated with appropriate exhaust gas aftertreatment components, such as a NOx storage catalytic converter. Furthermore, it can be provided that the CO2 emissions generated during the passive regeneration of the gasoline engine particle filter are assigned to the regeneration for documentation purposes.

It is optionally provided that the NOx storage catalytic converter is part of a gasoline engine particle filter and / or that the NOx storage catalytic converter is arranged in the rear area of a gasoline engine particle filter and / or that the rear part of the gasoline engine particle filter is coated with a NOx storage catalytic converter coating.

In particular, the regeneration temperature required for the soot oxidation processes when using nitrogen dioxide NO2 is significantly lower than the regeneration temperature required for the soot oxidation processes when using oxygen O2.

For example, the gasoline engine particle filter is passively regenerated by the introduction of nitrogen dioxide NO2 if the gasoline engine particle filter itself, the exhaust gas flowing through the gasoline engine particle filter and / or the particles located in the gasoline engine particle filter are or have a temperature which is greater than a regeneration temperature. In particular, the gasoline engine particle filter can be regenerated at temperatures of less than 600 ° C., in particular less than 500 ° C., preferably between 200 ° C. and 500 ° C.

By using the regeneration based on nitrogen dioxide, the so-called passive regeneration, and the lower regeneration temperatures required for this, it may be possible to increase the thermal and / or thermomechanical aging resistance of the gasoline engine particle filter in terms of sustainability.

Furthermore, it may be possible to reduce the amount of particles in the gasoline engine particle filter without an active heating measure and CO2 deterioration and to a small, but

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It is optionally provided that the active regeneration of the gasoline engine particle filter with oxygen takes place at a gasoline engine particle filter temperature of greater than 600 ° C, in particular of greater than 500 ° C, and / or that the passive regeneration of the gasoline engine particle filter with nitrogen dioxide takes place at a gasoline engine particle filter temperature of less than 600 ° C, in particular less than 500 ° C, preferably between 200 ° C and 500 ° C, takes place.

To achieve these exhaust gas filter temperatures, depending on the position of the gasoline engine particle filter in the exhaust gas aftertreatment system, on the loading condition of the gasoline engine particle filter and on the, in particular customer-relevant, driving conditions, an active adjustment of the gasoline engine operating parameters can be carried out.

If necessary, the temperature in the gasoline engine particle filter is increased in that the operating parameters of the gasoline engine, such as the ignition angle, are adjusted so that the temperature of the exhaust gas rises.

This means that, for example, when a certain state of the gasoline engine particle filter is reached, for example when a certain load of the gasoline engine particle filter is reached, the regeneration of the gasoline engine particle filter is actively promoted, regulated and / or controlled by the control unit.

In particular, in a regeneration operation, which may be superimposed on normal operation, as required, in order to maintain the functionality of all exhaust gas components, the gasoline engine particle filter is supplied with oxygen and, in particular, filtered ambient air for regeneration of the gasoline engine particle filter via a feed line that opens into the exhaust gas aftertreatment system.

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In the context of the present invention, active regeneration of the gasoline engine particle filter means an oxidation of the carbon with oxygen in the gasoline engine particle filter, in which oxygen is additionally introduced into the gasoline engine particle filter according to the invention. In order to enable adequate regeneration, the exhaust gas filter temperatures should be greater than 600 ° C, in particular greater than 500 ° C, so that the desired effect of the load reduction can occur.

In active regeneration mode, it may be possible that fuel consumption, in particular CO2 emissions, increases. The trade-off from fuel consumption to heating output needs to be assessed precisely in the strategy-finding phase in order to keep the increase in fuel consumption in the overall application of the strategy as low as possible and to activate the activation conditions of active regeneration to protect the aftertreatment component and the engine in accordance with the requirements Sustainability.

For example, this is done by analyzing the driving conditions and gasoline engine particulate filter position-dependent temperature boundary conditions, in which the active heating measure is not necessary if the regeneration temperature in the gasoline engine particulate filter can be reached even without an active measure.

A possible increase in fuel consumption in regeneration operation can be documented and shown in combination with its frequency of use.

In the context of the present invention, passive regeneration of the gasoline engine particle filter can be understood to mean regeneration of the gasoline engine particle filter in which nitrogen dioxide NO2 is introduced into the gasoline engine particle filter and the gasoline engine particle filter is regenerated using nitrogen dioxide NO2. It is preferably provided that nitrogen monoxide NO of the exhaust gas is reacted with the oxygen O2 supplied through the feed line to nitrogen dioxide NO2 and then the nitrogen dioxide NO2 is introduced into the gasoline engine particle filter.

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In particular, the gasoline engine particle filter is regenerated by the introduction of nitrogen dioxide NO2 if the gasoline engine particle filter itself, the exhaust gas flowing through the gasoline engine particle filter and / or the particles located in the gasoline engine particle filter have a temperature which is greater than a regeneration temperature. In particular, the gasoline engine particle filter can be regenerated at temperatures of less than 600 ° C., in particular less than 500 ° C., preferably between 200 ° C. and 500 ° C. This makes it possible, among other things, to increase the service life of the gasoline engine particulate filter, since the necessary regeneration temperatures are lower compared to active regeneration.

It may be provided that the gasoline engine particle filter is uncoated or as a 2-way catalyst or as a 3-way catalyst or as a 4-way catalyst or that the gasoline engine particle filter does not have a catalytically active coating or a 2-way catalyst or a 3- Way catalyst or a 4-way catalyst includes.

It can be provided that the gasoline engine particle filter is uncoated in its embodiment and is only set up to filter particles.

It can be provided that the gasoline engine particle filter is set up to filter particles and, in addition or in combination or in combination, to convert and / or store hydrocarbons, carbon monoxide and nitrogen oxides. As a result, depending on the coating, the gasoline engine particle filter is designed as a 2, 3 or 4-way catalytic converter.

If appropriate, provision is made for the oxygen and in particular the air for regeneration of the gasoline engine particle filter to be fed to the gasoline engine particle filter via the feed line leading into the exhaust gas aftertreatment system between the main catalytic converter and the gasoline engine particle filter.

It is preferably provided that the feed line into the gasoline engine particle filter and / or possibly before the oxidation catalyst

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Exhaust aftertreatment system opens. This may make it possible to supply oxygen to the gasoline engine particle filter in regeneration mode for regeneration.

If appropriate, provision is made for air to be supplied to the gasoline engine particle filter for regeneration, in particular air compressed by a turbocharger of the gasoline engine, for the air to enter the supply line between a compressor and a charge air cooler for the turbocharger, and for the air to exit after the main catalytic converter and upstream of the gasoline engine particle filter the supply line emerges.

This means that in regeneration mode, air from the environment can flow through the compressor of the turbocharger, through the feed line and then optionally through the catalyst having the oxidation catalyst coating and through the gasoline engine particle filter.

In particular, it is provided that air compressed by the compressor of the turbocharger enters the supply line after the compressor of the turbocharger and optionally exits the supply line before the catalyst having the oxidation catalyst coating and before the gasoline engine particle filter, in particular after the main catalyst.

If appropriate, provision is made for air to be supplied to the gasoline engine particle filter for regeneration, in particular air compressed by a turbocharger of the gasoline engine, for the air to enter the supply line between a charge air cooler of the turbocharger and the gasoline engine and for the air to exit after the main catalytic converter and upstream of the gasoline engine particle filter the supply line emerges.

This means that in regeneration mode, air can flow through the compressor of the turbocharger, through the charge air cooler of the turbocharger, through the feed line and then, if appropriate, through the catalyst having the oxidation catalyst coating and through the gasoline engine particle filter.

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In particular, it is provided that air compressed by the compressor of the turbocharger enters the supply line after the charge air cooler of the turbocharger and, if appropriate, exits the supply line before the catalyst having the oxidation catalyst coating and before the gasoline engine particle filter, in particular after the main catalyst.

If appropriate, it is provided that ambient air is supplied to the gasoline engine particle filter for regeneration, that the ambient air from the environment enters the feed line and that the ambient air exits the feed line after the main catalytic converter and before the gasoline engine particle filter.

This means that in regeneration mode, ambient air can flow through the supply line and then, if appropriate, through the catalyst having the oxidation catalyst coating and through the gasoline engine particle filter.

In particular, it is provided that uncompressed air, in particular uncompressed ambient air, enters the supply line and, if appropriate, exits the supply line before the catalyst having the oxidation catalyst coating and before the gasoline engine particle filter, in particular after the main catalyst.

In particular, it can be provided that the feed line into the exhaust gas aftertreatment system contains a check valve, a membrane or the like in order to prevent or prevent the exhaust gas from flowing out into the environment. This can ensure that no exhaust gas gets into the environment through the supply line.

Where appropriate, it is provided that the ambient air is sucked in automatically by the exhaust gas flow present in the exhaust gas aftertreatment system and in particular that the ambient air is introduced into the exhaust gas aftertreatment system via a venturi nozzle, in particular a pipe guide of the exhaust gas aftertreatment system designed in the form of a venturi nozzle.

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In particular, it can be provided that one end of the feed line opens into the environment, in particular outside the exhaust gas aftertreatment system, and the other end into the exhaust gas aftertreatment system. In particular, it must be ensured that a device, such as a check valve, is arranged on the supply line, which prevents the exhaust gas from flowing out into the environment.

Furthermore, a suppression can be present or arise in the exhaust gas aftertreatment system if exhaust gas, in particular high flow velocities, flows through the exhaust gas aftertreatment system. It may thus be possible for air from the environment to be sucked through the supply line into the exhaust gas aftertreatment system through this suppression and preferably to be introduced into the exhaust gas aftertreatment system upstream of the gasoline engine particle filter.

In particular, the ambient air can be introduced into the exhaust gas aftertreatment system via a venturi nozzle, in particular via a pipe guide in the form of a venturi nozzle of the exhaust gas aftertreatment system. It is optionally provided that the exhaust gas aftertreatment system and / or the feed line is or are designed as a venturi nozzle in the area in which the feed line opens into the exhaust gas aftertreatment system.

If necessary, it is provided that the supply line is opened for supplying oxygen and that the supply line is opened in particular by opening a controllable and / or regulable supply valve and / or that the supply line comprises a safety device, such as in particular a check valve or a switchable valve.

Furthermore, a device regulating or preventing the introduction of air, in particular a supply valve, can be provided on the supply line, with which the supply of oxygen, in particular the supply of air, can be controlled and / or regulated by the supply line.

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In order to prevent the exhaust gas from flowing out into the environment in any case, the supply line can comprise a safety device, such as a check valve or a switchable valve, which is closed in particular when de-energized.

If appropriate, it is provided that the exhaust gas aftertreatment system includes the main catalytic converter (s) and the gasoline engine particle filter and, if appropriate, 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 catalytic converter (s) and / or one or more, in particular gaseous exhaust gas aftertreatment-coated, gasoline engine particle filters and / or one or more NOx storage catalytic converter (s) and / or one or more exhaust gas aftertreatment component (s), which one NOx storage catalytic converter coating, and / or one or more SCR system (s) and / or one or more exhaust gas aftertreatment component (s), which comprise an SCR coating, and / or a secondary air injection or that the exhaust gas aftertreatment system from the main catalyst (s) and the gasoline engine particulate filter and possibly As one or more pre-catalyst (s) and / or one or more secondary catalyst (s), in particular one or more oxidation catalyst (s) which comprises an oxidation catalyst coating (s) and / or one or more heating catalyst (s) and / or one or a plurality of gasoline engine particulate filters / n, and / or one or more NOx storage catalytic converter (s) and / or one or more exhaust gas aftertreatment component (s), which comprises a NOx storage catalytic converter coating, 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.

If appropriate, it is provided that the gasoline engine arrangement in an operating phase, the normal operating phase, possibly a coasting operating phase and the regeneration mode, includes that the gasoline engine in the normal operating phase

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AVL List GmbH is preferably operated and / or regulated in a lambda window by λ = 1, that the overrun phase is formed by at least one unfired overrun phase and / or at least one fired overrun phase, that in the fired overrun phase the gas flowing through the main catalyst is low in oxygen, in particular in the Essentially oxygen-free, and in particular the exhaust gas is a stoichiometric or sub-stoichiometric, in particular sub-stoichiometric, combustion, with the gasoline engine being supplied in the unfired overrun operating phase via an exhaust gas recirculation line which before or during the transition from the normal operating phase to the unfired overrun operation phase in the gasoline engine was generated, or wherein in the unfired overrun operating phase that exhaust gas is supplied to the gasoline engine via an exhaust gas recirculation line, which before or during the transition from a fired overrun operating phase to the unfired overrun operating phase in the gasoline engine.

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.

If appropriate, it is provided that the exhaust gas aftertreatment system comprises the main catalytic converter and a NOx storage catalytic converter arranged downstream of the gasoline engine particle filter, that during storage operation of the NOx storage catalytic converter, 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 plant. is supplied that an oxidation catalytic converter is optionally provided between the main catalytic converter and the NOx storage catalytic converter, and 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 being less than 5 vol.% or is essentially zero, and / or wherein the in storage mode

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Main amount of oxygen flowing through the main catalytic converter or the amount of oxygen in the main catalytic converter is kept so low that the efficiency of the main catalytic converter is unaffected.

If appropriate, it is provided that 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, and that in the reduction mode of the SCR catalytic converter the SCR catalytic converter for reducing the nitrogen oxides via one or the supply line oxygen and in particular air opening into the exhaust gas aftertreatment system , 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 essentially zero, and / or the oxygen quantity of the exhaust gas flowing through the main catalyst in the reduction mode thus is kept low that the efficiency of the main catalyst is unaffected.

It is optionally provided that oxygen, in particular ambient air, is fed to the gasoline engine particle filter, the oxidation catalytic converter, the NOx storage catalytic converter and / or the SCR catalytic converter via a supply line.

Alternatively, it is provided that oxygen, in particular ambient air, is supplied to the gasoline engine particle filter, the oxidation catalytic converter, the NOx storage catalytic converter and / or the SCR catalytic converter via a separate supply line.

If necessary, it is provided that an operating material, in particular what is known as 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 operating material containing a reducing agent for reducing nitrogen oxide or being convertible into a reducing agent for reducing nitrogen oxide, and / or that a reducing agent for nitrogen oxide reduction, in particular ammonia NH3, by the main catalytic converter, in particular by the 3-way catalytic converter, in the context of normal petrol engine operation and / or by temporary adjustment if necessary

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AVL List GmbH generates the gasoline engine operating parameters of the gasoline engine, especially by operating the gasoline engine under stoichiometric.

In particular, the invention relates to a gasoline engine arrangement, the gasoline engine arrangement comprising a gasoline engine and an exhaust gas aftertreatment system, the exhaust gas aftertreatment system comprising at least one main catalytic converter and a gasoline engine particle filter that can be regenerated using oxygen, in particular air, preferably ambient air, and / or nitrogen dioxide, wherein in during a normal operating phase in the gasoline engine, fuel and air are converted to an exhaust gas, the gasoline engine arrangement comprising a supply line leading into the exhaust gas aftertreatment system for regeneration of the gasoline engine particle filter, and the gasoline engine arrangement being set up and / or suitable for carrying out the method according to the invention.

It is optionally provided that the gasoline engine is designed as a gasoline engine regulated in a lambda window by λ = 1 in front of the exhaust gas aftertreatment system.

If appropriate, it is provided that the supply line opens into the exhaust gas aftertreatment system in front of the gasoline engine particle filter, the supply line branching off between a compressor and a charge air cooler of the turbocharger, or the supply line branching off between a charge air cooler of the turbocharger and the gasoline engine, or the supply line for introducing air from the Environment outside the gasoline engine arrangement is open to ambient air.

If appropriate, it is provided that an oxidation catalyst is provided, the oxidation catalyst comprising an oxidation catalyst coating, or wherein the oxidation catalyst is a gasoline engine particle filter provided at least in its front region with an oxidation catalyst coating, or wherein the oxidation catalyst and in particular the coating acting as an oxidation catalyst Front area of the gasoline engine particulate filter is provided and in particular in the flow direction of the exhaust gas from the front of the

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Otto engine particle filter is applied, and that the oxidation catalyst coating comprises a platinum metal, such as in particular platinum, rhodium and / or palladium.

It may be provided that the gasoline engine particle filter is uncoated or as a 2-way catalyst or as a 3-way catalyst or as a 4-way catalyst or that the gasoline engine particle filter does not have a catalytically active coating or a 2-way catalyst or a 3- Way catalyst or a 4-way catalyst includes.

If appropriate, it is provided that a venturi nozzle is provided for introducing the ambient air of the supply line into the exhaust gas aftertreatment system and that the venturi nozzle is arranged in front of the gasoline engine particle filter, that the venturi nozzle is arranged in the area in which the supply line into the exhaust gas aftertreatment system flows.

It can be advantageous if a mechanical and / or electrical compressor is provided to convey the oxygen. It is particularly favorable if it is designed as a controllable and / or regulatable fan. However, all of the designs and advantages described below also apply in the event that the controllable and / or adjustable blower is a mechanical and / or electrical compressor.

It is optionally provided that a controllable and / or regulatable fan for conveying the oxygen, in particular the air, is provided in the supply line and / or that a supply valve is provided along the supply line, the supply valve for regulating the oxygen supplied to the gasoline engine particle filter and in particular the air is set up.

The controllable and / or regulatable blower can be used to control and / or regulate the delivery rate of the oxygen, in particular the delivery rate of the air, which is introduced through the supply line into the exhaust gas aftertreatment system, in particular upstream of the gasoline engine particle filter.

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If necessary, the blower can be used, continuously or discontinuously, to fill a pressure reservoir, which in turn serves as an oxygen reservoir, in particular an air reservoir, and is arranged in the feed line between a blower and the junction with the exhaust gas aftertreatment system.

The controllable and / or regulatable blower can be designed as a mechanical compressor and / or electrical compressor.

If appropriate, provision is made for air to be introduced into the exhaust gas aftertreatment system from the pressure accumulator filled with air via the supply line.

If appropriate, it is provided that a housing, in particular a steel housing, is provided and that in particular the oxidation catalytic converter or the gasoline engine particle filter coated with an oxidation catalytic converter coating, the NOx storage catalytic converter and / or, if appropriate, a heating element are provided.

It is optionally provided that an oxidation catalyst coated with an oxidation catalyst coating is provided between the main catalyst and the gasoline engine particle filter, or that the gasoline engine particle filter is provided with an oxidation catalyst coating at least in its front region, the oxidation catalyst coating being set up to NO with 02 to convert to NO2.

It is optionally provided that a, in particular catalytically coated, heating element for heating the main catalyst is provided after the gasoline engine and upstream of the main catalytic converter, in particular in the front area of the main catalytic converter, and / or that after the gasoline engine, in particular after the main catalytic converter, and before Oxidation catalyst, in particular in the front area of the oxidation catalyst, a, 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

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Gasoline engine particle filter, a, in particular catalytically coated, heating element is provided for heating the gasoline engine particle filter, and / or that after the gasoline engine, in particular after the gasoline engine particle filter, and before a NOx storage catalytic converter, in particular in the front area of the NOx storage catalytic converter, a, in particular catalytically coated, heating element is provided for heating the NOx storage catalyst.

If appropriate, it is provided that the gasoline engine arrangement comprises a gasoline engine and an exhaust gas aftertreatment system with at least the main catalytic converter, the gasoline engine particle filter and a NOx storage catalytic converter, that the main catalytic converter is designed or acts as a 3-way catalytic converter, and that the main catalytic converter is the gasoline engine particle filter, which is optionally called the 4th -Way catalytic converter acts, is arranged downstream that the gasoline engine particle filter is followed by the NOx storage catalytic converter and that one or the oxidation catalytic converter is optionally arranged upstream of the NOx storage catalytic converter.

It may be provided that the NOx storage catalytic converter is the last catalytic converter of the exhaust gas aftertreatment system in the flow direction of the exhaust gas.

In the context of the present invention, a front area of an exhaust gas aftertreatment component is to be understood as the area which the exhaust gas flows through earlier in the flow direction of the exhaust gas in the respective exhaust gas aftertreatment component. In particular, this can be the area through which the exhaust gas enters the respective exhaust gas aftertreatment component.

In the context of the present invention, a rear area of an exhaust gas aftertreatment component is to be understood as the area which the exhaust gas later flows through in the flow direction of the exhaust gas in the respective exhaust gas aftertreatment component. In particular, this can be the area through which the exhaust gas emerges from the respective exhaust gas aftertreatment component.

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Further features according to the invention may result from the claims, the description of the exemplary embodiments and the figures.

The invention will now be explained further using the example of exemplary, non-exclusive and / or non-limiting exemplary embodiments.

1a and 1b show a schematic graphic representation of variants of a first embodiment of a gasoline engine arrangement according to the invention,

2a and 2b show a schematic graphic representation of variants of a second embodiment of a gasoline engine arrangement according to the invention,

3a to 3d show a schematic graphic representation of variants of a third embodiment of a gasoline engine arrangement according to the invention,

4a to 4c show a schematic graphic representation of variants of a fourth embodiment of a gasoline engine arrangement according to the invention,

5a to 5c show a schematic graphic representation of variants of a fifth embodiment of a gasoline engine arrangement according to the invention, and

6a to 6c show a schematic graphic representation of variants of a sixth embodiment of a gasoline engine arrangement according to the invention.

Unless otherwise stated, the reference numerals correspond to the following components: gasoline engine 1, exhaust gas aftertreatment system 2, main catalytic converter 3, gasoline engine particle filter 4, turbocharger 5, throttle valve 6, compressor 7, turbine 8, low-pressure EGR line 9, NOx storage catalytic converter 10, venturi Nozzle 11, supply valve 12, charge air cooler 13, supply line 14, further main catalytic converter 15, filter device 16, safety device 17, heating element 18, blower 19, pressure accumulator 20 and oxidation catalytic converter 21.

1a and 1b show schematic graphic 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.

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In this embodiment, 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 gasoline engine particle filter 4 arranged downstream of the main catalytic converter 3. In this embodiment, the main catalytic converter 3 is designed as a 3-way catalytic converter and is directly connected to the turbine 8 of the turbocharger 5, in particular close to the engine.

In a further variant, the exhaust gas aftertreatment system 2 can comprise a main catalytic converter 3 or more main catalytic converters 3, 15, a gasoline engine particle filter 4 and further catalytic converters.

1a and 1b also include a turbocharger 5 and a throttle valve 6. The turbocharger 5 comprises a compressor 7 and a turbine 8.

According to FIG. 1b, the gasoline engine arrangement additionally comprises a low-pressure EGR line 9 of a low-pressure EGR system compared to the gasoline engine arrangement of FIG. 1a.

Via the low-pressure EGR line 9, the exhaust gas generated before or during the transition to the unfired overrun operating phase can be fed to the gasoline engine 1 and then preferably to the exhaust gas aftertreatment system 2 in the unfired overrun operating phase.

Depending on the variant, the exhaust gas generated can enter the low-pressure EGR line 9 directly after the gasoline engine 1 or after an exhaust gas aftertreatment component of the exhaust gas aftertreatment system 2 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 1, are flowed through by the generated exhaust gas in the unfired overrun operating phase.

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In the normal operating phase, which corresponds to the regular operation of the gasoline engine arrangement, fuel is supplied to the gasoline engine 1. In the normal operating phase, the fuel is converted with air to an exhaust gas.

In the normal operating phase, the gasoline engine 1 is operated and / or regulated in a lambda window by λ = 1. This means that the gasoline engine 1 is operated oscillating by a lambda value λ of 1.0 and is operated and / or regulated in the range from λ = 0.9 to 1.1, preferably from λ = 0.95 to 1.05 . According to this embodiment, it can be provided that the gasoline engine 1 is operated and / or regulated in phases or permanently, rich or lean in its normal operating phase.

According to this embodiment, the exhaust gas expelled from the gasoline engine 1 in the normal operating phase is essentially oxygen-free. This substantially prevents regeneration, in particular active regeneration, of the gasoline engine particle filter 4 in the normal operating phase.

According to this embodiment, the gasoline engine 1 is operated in the regeneration mode essentially the same as in the normal mode. This means that even in the regeneration mode, the exhaust gas emitted by the gasoline engine 1 is essentially oxygen-free.

In a further variant, essentially oxygen-free exhaust gas can also be pumped through the gasoline engine 1 or through the gasoline engine 1 and the main catalyst 3 during the regeneration operation.

In all embodiments, it is provided that the oxygen quantity of the exhaust gas flowing through the main catalyst 3 during regeneration operation 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. As a result, the effectiveness, in particular the efficiency, of the main catalytic converter 3, in particular the 3-way catalytic converter, is the same before and after the regeneration operation.

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It can be provided that the oxygen content of the exhaust gas flowing through the main catalyst 3 or of the exhaust gas located in the main catalyst 3 is less than 5% by volume or substantially zero during the regeneration operation.

This makes it possible to solve the conflict of objectives mentioned in the introductory part of the description and to create a method and a gasoline engine arrangement which enable low fuel consumption and low pollutant emissions.

In other words, the introduction of air, known as air flooding, into the exhaust gas aftertreatment system 2 during regeneration of the gasoline engine particle filter 4, in particular during load gaps or overrun phases, with negative consequences for the function of the exhaust gas purification and the thermomechanical loading of the exhaust gas aftertreatment system 2 can thereby be avoided and / or be reduced. It is preferably provided that for the regeneration of the gasoline engine particle filter 4 only the gasoline engine particle filter 4 and possibly an oxidation catalyst 21 comprising an oxidation catalyst coating is / are flowed through with oxygen, in particular with air.

This leaves comparatively hot engine exhaust gas essentially without free oxygen in the main catalytic converter 3 even during the regeneration of the gasoline engine particle filter 4. As a result, any storage of oxygen in the main catalytic converter 3 that may occur and the subsequently required rich operation of the gasoline engine 1 can be prevented.

In this embodiment, it is thus possible to actively regenerate the gasoline engine particle filter 4 by introducing oxygen, in particular air, through the supply line 14. The active regeneration of the gasoline engine particle filter 4 takes place here by the combustion of or parts of the combustible components of the particles accumulated in the gasoline engine particle filter 4. For this so-called active regeneration, the regeneration of the gasoline engine particle filter 4 with O2, gasoline engine particle filter temperatures of preferably over 500 ° C. are required.

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In a further variant of this first embodiment, an oxidation catalytic converter 21 can also be provided in front of or on the gasoline engine particle filter 4, which is configured to convert the NO of the exhaust gas to NO2 using oxygen, in particular the oxygen introduced through the supply line 14. This oxidation catalyst 21 has an oxidation catalyst coating which comprises an element of the platinum metals or platinoids or is formed from an element of the platinum metals or platinoids. In English, platinum metals or platinoids are also referred to as platinum group metals. By introducing nitrogen dioxide NO2, the gasoline engine particle filter 4 can be passively regenerated if the gasoline engine particle filter 4 itself, the exhaust gas flowing through the gasoline engine particle filter 4 and / or the particles located in the gasoline engine particle filter 4 have or have a temperature which is greater than a regeneration temperature. In particular, the gasoline engine particle filter 4 can already be regenerated at temperatures of less than 600 ° C., in particular less than 500 ° C., preferably between 200 ° C. and 500 ° C. This makes it possible to increase the service life of the gasoline engine particle filter 4.

Both the initiation of active and passive regeneration and in particular the control of the oxygen supplied, in particular the air supplied, are 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.

In the normal operating phase and possibly also in the regeneration mode, the gasoline engine particle filter 4 is loaded by the particles emitted by the gasoline engine 1, in particular with soot and / or with ash. Only after the gasoline engine particle filter 4 has a sufficient load, in particular a sufficiently designed filter cake or a sufficient filter cake thickness or a sufficient soot mass, does the gasoline engine particle filter 4 have its normal filtration efficiency. According to this embodiment, the gasoline engine particle filter 4 has its normal filtration efficiency if the gasoline engine particle filter 4 has a particle loading of over 0 g / l, for example over 0.1 g / l, in particular a particle loading in the area

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AVL List GmbH has between 0.1 g / l to 3 g / l, preferably a particle loading in the range between 0.5 g / l to 3 g / l.

In contrast to this, the gasoline engine particle filter 4 in the fresh state, that is to say in the regenerated or in the new state, has a filtration efficiency which is lower than the normal filtration efficiency. This difference in the filtration efficiency, in particular in the cleaning performance and / or particle separation performance of the gasoline engine particle filter 4, can be attributed to an insufficiently designed filter cake. According to this embodiment, the gasoline engine particle filter 4 has its reduced filtration efficiency if the gasoline engine particle filter 4 has a particle load that is smaller than the basic load of the respective gasoline engine particle filter 4.

In the regenerated state, the gasoline engine particle filter 4 has no or only a very thin filter cake, at least in sections, since the combustible components of the particles deposited in the gasoline engine particle filter 4 have been burned by the regeneration.

The regeneration of the gasoline engine particle filter 4, on the one hand, reduces the exhaust gas back pressure, which was caused by the particle loading in the gasoline engine particle filter 4. On the other hand, the combustion of combustible constituents of the particles deposited on the gasoline engine particle filter 4 reduces or removes the filter cake at least in sections, as a result of which the filtration efficiency of the gasoline engine particle filter 4 is reduced.

In the new, in particular brand new, not retracted state, the gasoline engine particle filter 4 has no filter cake.

To carry out the regeneration of the gasoline engine particle filter 4, oxygen, in particular air, is fed to the gasoline engine particle filter 4 through a feed line 14 according to this embodiment.

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According to this embodiment, the feed line 14 opens before the gasoline engine particle filter 4 into the exhaust gas aftertreatment system 2 and branches off between the compressor 7 and the charge air cooler 13 of the turbocharger 5.

This means that the oxygen and in particular the air for regeneration of the gasoline engine particle filter 4 is compressed air 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 upstream of the gasoline engine particle filter 4 from the supply line 14.

The exhaust gas generated in the normal operating phase and in regeneration mode in the gasoline engine 1 first flows through the turbine 8 of the turbocharger 5, then the main catalytic converter 3 and then, if appropriate, the oxidation catalytic converter 21 and the gasoline engine particle filter 4 before it exits into the environment.

2a and 2b show schematic graphic representations of different variants of a second 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. 2a and 2b can preferably correspond to the features of the embodiments according to FIGS. 1a and 1b.

In contrast to the variants of the first embodiment of a gasoline engine arrangement according to the invention, the exhaust gas aftertreatment system 2 in the second embodiment of a gasoline engine arrangement according to the invention comprises a NOx storage catalytic converter 10 in addition to the main catalytic converter 3 and the gasoline engine particle filter 4.

The NOx storage catalytic converter 10 is arranged downstream of the gasoline engine particle filter 4, the gasoline engine particle filter 4 being arranged downstream of the main catalytic converter 3. The NOx storage catalytic converter 10 is set up to store the nitrogen oxides which arise, in particular, when the gasoline engine 1 is in lean operation or when the passive regeneration occurs.

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In a further variant, the gasoline engine particle filter 4 can include the NOx storage catalytic converter 10. In a further variant, the NOx storage catalytic converter 10 can be provided in the rear area of the gasoline engine particle filter 4 and in particular can be an integral part of the gasoline engine particle filter 4.

According to FIG. 2b, the gasoline engine arrangement additionally comprises a low-pressure EGR line 9 of a low-pressure EGR system compared to the gasoline engine arrangement of FIG. 2a. Exhaust gas recirculation line, which according to this embodiment is designed as a low-pressure EGR line 9, allows exhaust gas to be supplied to the gasoline engine 1 in the unfired overrun operating phase.

3a to 3d show schematic representations of different variants of a third 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. 3a to 3d can preferably correspond to the features of the embodiments according to FIGS. 1a, 1b, 2a and 2b.

According to this embodiment, the feed line 14, in particular one end of the feed line 14, opens into the exhaust gas aftertreatment system 2 in front of the gasoline engine particle filter 4. Furthermore, the feed line 14, in particular the other end of the feed line 14, is open to the environment. This means that the other end of the feed line 14 opens outside the gasoline engine arrangement.

This means that the oxygen and in particular the air for the regeneration of the gasoline engine particle filter 4, in particular directly, enters the feed line 14 from the environment and exits the feed line 14 after the main catalytic converter 3 and before the gasoline engine particle filter 4.

According to the embodiment, it is provided that the exhaust gas aftertreatment system 2 in the area in which the supply line 14 in the

Exhaust gas aftertreatment system 2 opens out as a Venturi nozzle 11.

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According to this embodiment, a suppression occurs when exhaust gas aftertreatment system 2 is flowed through. As a result of this suppression, air is sucked in from the environment through the supply line 14 into the exhaust gas aftertreatment system 2 and introduced before the gasoline engine particle filter 4.

According to this embodiment, a device regulating or preventing the introduction of air, in particular a supply valve 12, is provided. With this supply valve 12, the quantity of oxygen introduced through the supply line 14, in particular the quantity of air introduced, can be controlled and / or regulated.

According to FIG. 3b, compared to the gasoline engine arrangement of FIG. 3a, the gasoline engine arrangement additionally comprises a low-pressure EGR line 9 of a low-pressure EGR system.

According to FIG. 3c, the gasoline engine arrangement comprises, in addition to the gasoline engine arrangement of FIG. 3a, a further main catalytic converter 15 and the feed line 14 comprises a filter device 16 and a safety device 17. The safety device 17 prevents the exhaust gases from escaping from the exhaust gas aftertreatment system 2 into the environment .

According to FIG. 3d, compared to the gasoline engine arrangement of FIG. 3c, the gasoline engine arrangement additionally comprises a heating element 18, which is arranged in front of the main catalytic converter 3.

Alternatively, a controllable and / or regulatable blower 19 can be provided, which controls and / or regulates the delivery quantity of oxygen, in particular the delivery quantity of air, which is introduced through the supply line 14 into the exhaust gas aftertreatment system 2, in particular upstream of the gasoline engine particle filter 4.

4a to 4c show schematic graphic representations of different variants of a fourth embodiment of an embodiment of the invention

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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. 4a to 4c can preferably correspond to the features of the embodiments according to FIGS. 1a, 1b, 2a, 2b, 3a, 3b, 3c and 3d.

According to this embodiment, a blower 19, which in this embodiment is designed as an electrical compressor 7, is provided. The fan 19 can introduce air filtered by a filter device 16 via the feed line 14.

According to FIG. 4b, air compressed by the fan 19 is introduced into a pressure accumulator 20. Oxygen, in particular air, can be introduced into the exhaust gas aftertreatment system 2 from the pressure accumulator 20 via a supply line 14.

According to FIG. 4 c, the fan 19 draws air from the intake tract upstream of the compressor 7 of the turbocharger 5 of the gasoline engine arrangement and in particular introduces it into the pressure accumulator 20.

5a to 5c show schematic graphic representations of different variants of a fifth 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. 5a to 5c can preferably correspond to the features of the embodiments according to FIGS. 1a, 1b, 2a, 2b, 3a, 3b, 3c, 3d, 4a, 4b and 4c.

According to this embodiment, the exhaust gas aftertreatment system 2 comprises a main catalytic converter 3, an oxidation catalytic converter 21, a gasoline engine particulate filter 4 and an NOx storage catalytic converter 10. In addition, the main catalytic converter 3 is upstream of the oxidation catalytic converter 21, the oxidation catalytic converter 21 before the gasoline engine particulate filter 4 and the gasoline engine particulate filter 4 upstream of the NOx storage catalytic converter 10 arranged.

According to this embodiment, the oxidation catalytic converter 21 comprises an oxidation catalytic converter coating.

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Oxygen, in particular air, is introduced in front of the oxidation catalytic converter 21 via a feed line 14, which comprises a feed valve 12. In particular, according to this embodiment, only the oxidation catalytic converter 21, the gasoline engine particle filter 4 and the NOx storage catalytic converter 10 are flowed through with the introduced air.

According to FIG. 5a, the air enters the supply line 14 between the compressor 7 and the charge air cooler 13 of the turbocharger 5 and exits the supply line 14 upstream of the oxidation catalytic converter 21.

According to FIG. 5b, the air is drawn in by a fan 19 upstream of the compressor 7 of the turbocharger 5 or from the surroundings. Furthermore, the air sucked in by the fan 19 exits the supply line 14 upstream of the oxidation catalytic converter 21. The blower 19 can be designed as a secondary air pump or as an electrical or mechanical compressor 7.

According to FIG. 5c, the air is drawn automatically into the exhaust gas aftertreatment system 2 through a venturi nozzle 11 upstream of the oxidation catalytic converter 21. A safety device 17 is provided on the feed line 14, which prevents exhaust gas from escaping from the exhaust gas aftertreatment system 2 into the environment.

6a to 6c show schematic graphic representations of different variants of a sixth 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. 6a to 6c can preferably correspond to the features of the embodiments according to FIGS. 1a, 1b, 2a, 2b, 3a, 3b, 3c, 3d, 4a, 4b, 4c, 5a, 5b and 5c.

According to this embodiment, the exhaust gas aftertreatment system 2 comprises a main catalytic converter 3, a further main catalytic converter 15, a gasoline engine particle filter 4 and a NOx storage catalytic converter 10. In addition, the main catalytic converter 3 is in front of the further main catalytic converter 15, and the further main catalytic converter 15 is in front of the

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Gasoline engine particle filter 4 and the gasoline engine particle filter 4 are arranged in front of the NOx storage catalytic converter 10. Furthermore, the gasoline engine particle filter 4 comprises an oxidation catalyst 21, the coating acting as an oxidation catalyst 21 being provided in the front region of the gasoline engine particle filter 4.

Oxygen, in particular air, is introduced upstream of the gasoline engine particle filter 4 via a feed line 14, which comprises a feed valve 12. In particular, according to this embodiment, only the gasoline engine particle filter 4, which comprises the oxidation catalytic converter 21, and the NOx storage catalytic converter 10 are flowed through with the introduced air.

According to FIG. 6a, the air enters the supply line 14 between the charge air cooler 13 of the turbocharger 5 and the gasoline engine 1 and exits the supply line 14 in front of the gasoline engine particle filter 4.

According to FIG. 6b, the air is drawn in by a fan 19 in front of the compressor 7 of the turbocharger 5 or from the surroundings. Furthermore, the air sucked in by the blower 19 exits the supply line 14 upstream of the gasoline engine particle filter 4. The blower 19 can be designed as a secondary air pump or as an electrical or mechanical compressor 7.

According to FIG. 6c, the air is drawn automatically into the exhaust gas aftertreatment system 2 through a venturi nozzle 11 upstream of the gasoline engine particle filter 4. A safety device 17 is provided on the feed line 14, which prevents exhaust gas from escaping from the exhaust gas aftertreatment system 2 into the environment.

The effects according to the invention can be achieved by means of these exemplary configurations.

The invention is not limited to the illustrated embodiments, but encompasses any method and any gasoline engine arrangement according to the following patent claims.

Claims (32)

Claims 1. Method for operating a gasoline engine arrangement, the gasoline engine arrangement comprising a gasoline engine (1) and an exhaust gas aftertreatment system (2), the exhaust gas aftertreatment system (2) comprising at least one main catalyst (3) and one downstream of the main catalyst (3), using oxygen and / or gasoline engine particle filter (4) that can be regenerated by nitrogen dioxide, and in a normal operating phase in the gasoline engine (1) fuel and air are converted into exhaust gas, characterized in that in a regeneration operation via a feed line (14) leading into the exhaust gas aftertreatment system (2) Oxygen and in particular air, preferably filtered ambient air, are fed to the gasoline engine particle filter (4) for regeneration of the gasoline engine particle filter (4), the oxygen content of the exhaust gas flowing through the main catalyst (3) or of the exhaust gas located in the main catalyst (3) in regeneration mode being less than 5 Vol .-% or is essentially zero, and / or wherein the oxygen quantity of the exhaust gas flowing through the main catalyst (3) during regeneration operation or the oxygen quantity of the exhaust gas located in the main catalyst (3) is kept so low that the efficiency of the entire exhaust system, in particular of the main catalyst (3 ) is unaffected. 2. The method according to claim 1, characterized in that in the normal operating phase, the exhaust gas of the gasoline engine (1) is fed to the main catalyst (3), that the main catalyst (3) is designed or acts as a 3-way catalyst, and that the gasoline engine (1) is operated or regulated in its normal operating phase, preferably in a lambda window by λ = 1. 45/63 PP32054AT AVL List GmbH 3. The method according to any one of claims 1 or 2, characterized in that the NO of the exhaust gas is converted to NO2 in an oxidation catalyst (21) using the oxygen introduced through the supply line (14). 4. The method according to claim 3, characterized in that the exhaust gas first flows through the main catalytic converter (3), then a secondary catalytic converter, in particular the oxidation catalytic converter (21) and then the gasoline engine particle filter (4), or in that the exhaust gas first flows through the main catalytic converter (3) and then simultaneously flows through the oxidation catalyst (21) and the gasoline engine particle filter (4). 5. The method according to claim 3 or 4, characterized in that the oxidation catalyst (21) has an oxidation catalyst coating, or that the oxidation catalyst (21) is a gasoline engine particle filter (4) provided at least in its front region with an oxidation catalyst coating, wherein the oxidation catalyst coating comprises a platinum metal, such as in particular platinum, rhodium and / or palladium, and wherein NO or O is converted to NO2 in or on the oxidation catalyst coating. 6. The method according to any one of claims 3 to 5, characterized in that the NO2 formed is converted to CO2 and NO with the particles stored in the gasoline engine particle filter (4), the reaction taking place in particular according to the following regulation: 2NO ₂ + C 2 NO + C0 ₂ 7. The method according to any one of the preceding claims, characterized in that 46/63 PP32054AT AVL List GmbH that the active regeneration of the gasoline engine particle filter (4) with oxygen takes place at a gasoline engine particle filter temperature of greater than 600 ° C, in particular greater than 500 ° C, and / or that the passive regeneration of the gasoline engine particle filter (4) with nitrogen dioxide takes place at a gasoline engine particle filter temperature of less than 600 ° C, in particular of less than 500 ° C, preferably between 200 ° C and 500 ° C. 8. The method according to any one of the preceding claims, characterized in that the gasoline engine particle filter (4) is uncoated or designed as a 2-way catalyst or as a 3-way catalyst or as a 4-way catalyst, or that the gasoline engine particle filter (4) does not comprise a catalytically active coating, or a 2-way catalyst or a 3-way catalyst or a 4-way catalyst. 9. The method according to any one of the preceding claims, characterized in that the oxygen and in particular the air for regeneration of the gasoline engine particle filter (4) via the supply line (14) opening between the main catalyst (3) and the gasoline engine particle filter (4) into the exhaust gas aftertreatment system (2) ) is fed to the gasoline engine particle filter (4). 10. The method according to any one of the preceding claims, characterized in that the gasoline engine particle filter (4) for regeneration air, in particular by a turbocharger (5) of the gasoline engine (1) compressed air is supplied, that the air between a compressor (7) and a charge air cooler (13) of the turbocharger (5) enters the supply line (14), and that the air exits the supply line (14) after the main catalytic converter (3) and before the gasoline engine particle filter (4). 11. The method according to any one of the preceding claims, characterized in that 47/63 PP32054AT AVL List GmbH that air is supplied to the gasoline engine particle filter (4) for regeneration of air, in particular air compressed by a turbocharger (5) of the gasoline engine (1), that the air is between a charge air cooler (13) of the turbocharger (5) and the gasoline engine (1 ) enters the supply line (14) and that the air exits the supply line (14) after the main catalytic converter (3) and before the gasoline engine particle filter (4). 12. The method according to any one of the preceding claims, characterized in that ambient gas is supplied to the gasoline engine particle filter (4) for regeneration, that the ambient air from the environment enters the supply line (14), and that the ambient air after the main catalyst (3) and before the petrol engine particle filter (4) emerges from the feed line (14). 13. The method according to claim 12, characterized in that the ambient air is sucked in automatically by the exhaust gas flow present in the exhaust gas aftertreatment system (2), and in particular that the ambient air via a venturi nozzle (11), in particular in the form of a venturi nozzle (11) configured pipe routing of the exhaust gas aftertreatment system (2) is introduced into the exhaust gas aftertreatment system (2). 14. The method according to any one of the preceding claims, characterized in that the supply line (14) is opened for the supply of oxygen and that the opening of the supply line (14) takes place in particular by opening a controllable and / or regulatable supply valve (12) and / or that the feed line (14) comprises a safety device (17), such as in particular a check valve or a switchable valve. 48/63 PP32054AT AVL List GmbH 15. The method according to any one of the preceding claims, characterized in that the exhaust gas aftertreatment system (2) the main catalyst (s) (3, 15) and the gasoline engine particle filter (4) and optionally one or more pre-catalyst (s) and / or one or more secondary catalyst / s, in particular one or more oxidation catalytic converter (s) (21) which comprises an oxidation catalytic converter coating / s, and / or one or more heating catalytic converter / s and / or one or more, in particular gaseous exhaust gas aftertreatment-coated, gasoline engine particle filters ( 4) and / or one or more NOx storage catalytic converter (s) (10) and / or one or more exhaust gas aftertreatment components / s which comprise a NOx storage catalytic converter coating and / or one or more SCR systems / s and / or one or more Exhaust gas aftertreatment component (s) which comprise an SCR coating and / or comprise a secondary air injection or that the exhaust gas aftertreatment system (2) from the main catalyst (s) (3, 15) and the gasoline engine particle filter (4) and optionally one or more pre-catalyst (s) and / or one or more secondary catalyst (s), in particular one or more oxidation catalyst (s) (21), which / r comprises an oxidation catalyst coating and / or one or more heating catalyst (s) and / or one or more gasoline particle filters (4) and / or one or more NOx storage catalytic converter (s) (10) and / or one or more gaseous exhaust gas aftertreatment coatings. or one or more exhaust aftertreatment component (s) comprising a NOx storage catalytic converter coating and / or one or more SCR system (s) and / or one or more exhaust aftertreatment component (s) comprising an SCR coating (s), and / or a secondary air injection is formed. 16. The method according to any one of the preceding claims, characterized in 49/63 PP32054AT AVL List GmbH that the gasoline engine arrangement in an operating phase, the normal operating phase, possibly an overrun operation phase and the regeneration operation, includes that the gasoline engine (1) is operated and / or regulated in the lambda window preferably in a lambda window by λ = 1 and / or that the overrun operation phase is controlled by At least one unfired overrun operating phase and / or at least one fired overrun operating phase is formed so that in the fired overrun operating phase the gas flowing through the main catalytic converter (3) is low in oxygen, in particular essentially oxygen-free, and in particular the exhaust gas from stoichiometric or sub-stoichiometric, in particular sub-stoichiometric combustion , With the gasoline engine (1) in the unfired overrun phase, that exhaust gas is supplied via an exhaust gas recirculation line that was generated before or during the transition from the normal operating phase to the unfired overrun phase in the gasoline engine (1), or The gasoline engine (1) in the unfired overrun operating phase is supplied with the exhaust gas via an exhaust gas recirculation line that was generated in the gasoline engine (1) before or during the transition from a fired overrun operating phase to the unfired overrun operating phase. 17. The method according to any one of the preceding claims, characterized in that the oxygen content of the exhaust gas located in the main catalyst (3) or that the oxygen content of the exhaust gas flowing through the main catalyst (3) in the unfired overrun phase essentially the oxygen content of the exhaust gas flowing through the main catalyst (3) Exhaust gas in the normal operating phase or in the fired overrun operating phase corresponds. 18. The method according to any one of the preceding claims, characterized in that 50/63 PP32054AT AVL List GmbH that the exhaust gas aftertreatment system (2) comprises the main catalytic converter (3) and a NOx storage catalytic converter (10) downstream of the gasoline engine particle filter (4), that in the storage mode of the NOx storage catalytic converter (10) the NOx storage catalytic converter (10) via or into the exhaust gas aftertreatment system (2) opening supply line (14) oxygen and in particular air, preferably filtered and / or compressed ambient air, is supplied such that an oxidation catalyst (21) is optionally provided between the main catalyst (3) and the NOx storage catalyst (10), and that the oxidation catalytic converter (21) comprises an oxidation catalytic converter coating, the oxygen content of the exhaust gas flowing through the main catalytic converter (3) or of the exhaust gas located in the main catalytic converter (3) in storage mode being less than 5% by volume or essentially zero, and / or the im Storage operation of the main catalyst (3) flowing oxygen amount of the exhaust gas o which keeps the amount of oxygen in the main catalytic converter (3) so low that the efficiency of the main catalytic converter (3) is unaffected. 19. The method according to any one of the preceding claims, characterized in that the exhaust gas aftertreatment system (2) comprises a SCR catalytic converter arranged downstream of the main catalytic converter (3), the oxidation catalytic converter (21) and / or the gasoline engine particle filter (4), that in the reduction mode of the SCR Catalyst is supplied to the SCR catalytic converter for reducing the nitrogen oxides via one or the supply line (14) opening into the exhaust gas aftertreatment system (2) and in particular air, preferably ambient air, optionally filtered or compressed, the oxygen content of the flow through the main catalyst (3) Exhaust gas in the reduction mode is less than 5% by volume or essentially zero, 51/63 PP32054AT AVL List GmbH and / or wherein the amount of oxygen of the exhaust gas flowing through the main catalytic converter (3) in the reduction mode is kept so low that the efficiency of the main catalytic converter (3) is unaffected. 20. The method according to any one of the preceding claims, characterized in that an operating material, in particular so-called AdBlue®, is introduced from a metering device upstream of the SCR catalytic converter, in particular after the oxidation catalytic converter (21), into the exhaust gas aftertreatment system (2), the operating material contains a reducing agent for nitrogen oxide reduction or can be converted into a reducing agent for nitrogen oxide reduction, and / or that a reducing agent for nitrogen oxide reduction, in particular ammonia NH3, through the main catalytic converter (3), in particular through the 3-way catalytic converter, as part of normal petrol engine operation and / or if necessary, temporary adjustment of the gasoline engine operating parameters of the gasoline engine (1), in particular by operating the gasoline engine (1) under substoichiometric, is generated. 21. Gasoline engine arrangement, the gasoline engine arrangement comprising a gasoline engine (1) and an exhaust gas aftertreatment system (2), the exhaust gas aftertreatment system (2) at least one main catalyst (3) and one downstream of the main catalyst (3), using oxygen, in particular air, preferably Ambient air, and / or nitrogen dioxide regenerable gasoline engine particle filter (4), wherein in a normal operating phase in the gasoline engine (1) fuel and air are converted to an exhaust gas, the gasoline engine arrangement leading to the regeneration of the gasoline engine particle filter (4) into the exhaust gas aftertreatment system (2) supply line (14) comprises, characterized in 52/63 PP32054AT AVL List GmbH that the gasoline engine arrangement is set up to carry out the method according to one of claims 1 to 20. 22. Gasoline engine arrangement according to claim 21, characterized in that the gasoline engine (1) is designed as a gasoline engine (1) regulated in a lambda window by λ = 1 in front of the exhaust gas aftertreatment system (2). 23. Gasoline engine arrangement according to claim 21 or 22, characterized in that the feed line (14) opens before the gasoline engine particle filter (4) into the exhaust gas aftertreatment system (2), the feed line (14) between a compressor (7) and a charge air cooler (13) branches off of the turbocharger (5), or wherein the feed line (14) branches off between a charge air cooler (13) of the turbocharger (5) and the gasoline engine (1), or wherein the feed line (14) for introducing air from the environment outside the gasoline engine arrangement Ambient air is open. 24. Otto engine arrangement according to claim 21 to 23, characterized in that an oxidation catalyst (21) is provided, the oxidation catalyst (21) comprising an oxidation catalyst coating, or wherein the oxidation catalyst (21) at least in its front region with an oxidation catalyst. Coating provided gasoline engine particle filter (4), or wherein the oxidation catalyst (21) and in particular the coating acting as an oxidation catalyst (21) is provided in the front region of the gasoline engine particle filter (4), and in particular in the flow direction of the exhaust gas from the front of the gasoline engine particle filter (4) is applied, and that the oxidation catalyst coating comprises a platinum metal, such as in particular platinum, rhodium and / or palladium. 53/63 PP32054AT AVL List GmbH 25. Gasoline engine arrangement according to one of claims 21 to 24, characterized in that the gasoline engine particle filter (4) is uncoated or as a 2-way catalyst or as a 3-way catalyst or as a 4-way catalyst, or that the gasoline engine particle filter ( 4) does not include a catalytically active coating or a 2-way catalyst or a 3-way catalyst or a 4-way catalyst. 26. Gasoline engine arrangement according to one of claims 21 to 25, characterized in that a venturi nozzle (11) for introducing the ambient air of the supply line (14) into the exhaust gas treatment system (2) is provided that the venturi nozzle (11) before Petrol engine particle filter (4) is arranged, and that the venturi nozzle (11) is arranged in the area in which the supply line (14) opens into the exhaust gas aftertreatment system (2). 27. Gasoline engine arrangement according to one of claims 21 to 26, characterized in that a controllable and / or adjustable blower (19) for conveying oxygen, in particular the air, is provided in the feed line (14), and / or that along the feed line (14) a supply valve (12) is provided, the supply valve (12) being set up to regulate the oxygen supplied to the gasoline engine particle filter (4) and in particular the air. 28. Gasoline engine arrangement according to one of claims 21 to 27, characterized in that a housing, in particular a steel housing, is provided, and that in the housing, in particular the oxidation catalyst (21) or coated with an oxidation catalyst coating 54/63 PP32054AT AVL List GmbH Gasoline engine particle filter (4), the NOx storage catalytic converter (10) and / or optionally a heating element (18) are provided. 29. Gasoline engine arrangement according to one of claims 21 to 28, characterized in that an oxidation catalyst (21) coated with an oxidation catalyst coating is provided between the main catalyst (3) and the gasoline engine particle filter (4), or that the gasoline engine particle filter (4) at least in is provided in its front area with an oxidation catalyst coating, the oxidation catalyst coating being set up to convert NO with O2 to NO2. 30. Otto engine arrangement according to one of claims 21 to 29, characterized in that after the gasoline engine (1) and before the main catalyst (3), in particular in the front region of the main catalyst (3), a, in particular catalytically coated, heating element (18) Heating of the main catalyst (3) is provided, and / or that after the gasoline engine (1), in particular after the main catalyst (3), and before the oxidation catalyst (21), in particular in the front region of the oxidation catalyst (21), one, in particular catalytically coated heating element (18) is provided for heating the oxidation catalyst (21), and / or that after the gasoline engine (1), in particular after the oxidation catalyst (21), and before the gasoline engine particle filter (4), in particular in the front area of the gasoline engine particle filter ( 4), a, in particular catalytically coated, heating element (18) is provided for heating the gasoline engine particle filter (4), and / or that after the gasoline engine, in particular right after the gasoline engine particle filter (4), and in front of a NOx storage catalytic converter (10), in particular in the front area of the NOx storage catalytic converter (10), a, in particular catalytically coated, heating element (18) is provided for heating the NOx storage catalytic converter (10) is. 55/63 PP32054AT AVL List GmbH 31. Gasoline engine arrangement according to one of claims 21 to 30, characterized in that the gasoline engine arrangement comprises a gasoline engine (1) and an exhaust gas aftertreatment system (2) with at least the main catalyst (3), the gasoline engine particle filter (4) and a NOx storage catalyst (10) that the main catalytic converter (3) is designed or acts as a 3-way catalytic converter, that the gasoline engine particle filter (4), which optionally acts as a 4-way catalytic converter, is arranged after the main catalytic converter (3), that the gasoline engine particle filter (4) NOx storage catalytic converter (10) is arranged downstream, and that one or the oxidation catalytic converter (21) is optionally arranged in front of the NOx storage catalytic converter (10). 32. Otto engine arrangement according to one of claims 21 to 31, characterized in that the NOx storage catalytic converter (10) in the flow direction of the exhaust gas is the last catalyst of the exhaust gas aftertreatment system (2).