WO2020099411A1

WO2020099411A1 - Exhaust-gas purification arrangement and motor vehicle

Info

Publication number: WO2020099411A1
Application number: PCT/EP2019/081035
Authority: WO
Inventors: Rolf BRÜCK
Original assignee: Vitesco Technologies GmbH
Priority date: 2018-11-13
Filing date: 2019-11-12
Publication date: 2020-05-22
Also published as: DE102018219332A1

Abstract

The invention relates to an exhaust-gas purification arrangement (1) for a motor vehicle, which exhaust-gas purification arrangement has a hydrocarbon store (3) and a multi-way catalytic converter (4), wherein the multi-way catalytic converter (4) is positioned downstream of the hydrocarbon store (3) in an exhaust-gas path (5) taken by an exhaust gas through the exhaust-gas purification arrangement (1). The exhaust-gas purification arrangement (1) is configured for receiving information items regarding an exhaust-gas composition of the exhaust gas upstream of the hydrocarbon store (3). The invention further relates to a motor vehicle which has an exhaust-gas purification arrangement (1) of said type which is operatively connected to an internal combustion engine of the motor vehicle. With the aid of the proposed exhaust-gas purification arrangement (1), better knowledge of the exhaust-gas composition in the exhaust-gas purification arrangement (1) downstream of the hydrocarbon store (3) is made possible.

Description

description

Emission control device and motor vehicle

The present invention relates to an exhaust gas purification arrangement for a

Motor vehicle that has a hydrocarbon storage and

Has multi-way catalyst, the multi-way catalyst to the

Hydrocarbon storage in an exhaust gas path, which an exhaust gas through the

Exhaust gas purification arrangement follows, is downstream.

The present invention further relates to a motor vehicle, such

Has exhaust gas purification arrangement which is operatively connected to an internal combustion engine of the motor vehicle.

Exhaust gas purification arrangements, which have catalysts, are usually arranged close to the internal combustion engine of the motor vehicle in order to enable the fastest possible light-off. Electric heating catalytic converters are also known for accelerating the light-off.

The performance of these heated catalytic converters can be increased

by the fact that HC adsorbers, i.e. absorbers for

Hydrocarbons are arranged, which are also referred to as hydrocarbon storage within the scope of this disclosure. These "collect" them

Hydrocarbons, while the heating catalyst the downstream

The catalyst system heats up and releases it again at higher temperatures. The exhaust gas therefore first passes through the exhaust gas path

Hydrocarbon storage and then the catalyst system.

By storing the hydrocarbons in the

Hydrocarbon storage is an exhaust gas composition before

Multi-way catalyst, which is usually a three-way catalyst, is not known. A rich exhaust gas composition is expected. this applies

Particularly in the case of hybrid vehicles in which the internal combustion engine suddenly has to start at high load, this is exacerbated by real driving emissions (in short: RDE, German: emissions in practical ferry operation). The object of the invention is to provide an exhaust gas purification arrangement and a motor vehicle which are improved over the prior art.

In particular, an operation of the exhaust gas purification arrangement should be made more efficient.

The object of the invention is achieved by an exhaust gas purification arrangement of the type mentioned at the outset, which is set up to provide information about the

Exhaust gas composition of the exhaust gas downstream of the

Obtain hydrocarbon storage.

A better knowledge of the exhaust gas composition in the

Exhaust gas purification arrangement downstream of the hydrocarbon accumulator allows the operation of the exhaust gas purification arrangement to be made more efficient and

if necessary, in particular through adjustments to the operation of the

Influence exhaust gas composition taking legal requirements into account.

Preferred embodiments of the invention form part of the dependent claims.

It is preferred that the exhaust gas purification arrangement is provided for controlling an oxygen concentration in the exhaust gas depending on the information. If you control the oxygen concentration depending on the

Information can be used to ensure that a cleaning performance of the exhaust gas cleaning arrangement is adequate in order to sufficiently clean the exhaust gas before it is released into the environment. In this way, it can be prevented that the exhaust gas purification arrangement produces too little or too much cleaning power. In particular, the exhaust gas purification arrangement can become more efficient and can operate more cost-effectively if the hydrocarbon storage due to an activity increases or decreases the amount of hydrocarbon in the exhaust gas relative to the originally untreated exhaust gas and thus changes the exhaust gas composition before the exhaust gas reaches the exhaust gas aftertreatment device.

In the present sense, the term taxes is not necessarily to be understood only narrowly as the metrological term. Regulations can also be understood as taxes in the present case. Rather, the term control can generally be understood as the adjustment of the oxygen concentration taking into account the information obtained. The activity of the hydrocarbon storage can

Hydrocarbon intake amount per time interval and / or one

Hydrocarbon release amount per time interval. The more hydrocarbon the hydrocarbon reservoir absorbs per time interval, the less

Hydrocarbon preferably contains the exhaust gas from which the

Hydrocarbon was taken up when it reached the multi-way catalyst. The more previously absorbed hydrocarbon the

Releases hydrocarbon storage per time interval, the more hydrocarbon preferably contains the exhaust gas into which the hydrocarbon was released when it reaches the multi-way catalyst.

Cleaning performance can define a hydrocarbon removal rate. In embodiments, it is provided that the hydrocarbon removal rate of the exhaust gas purification arrangement has a target value of more than 50% compared to the untreated exhaust gas. The is particularly preferred

Hydrocarbon removal rate greater than 75%, again preferably greater than 90%, particularly preferably greater than 99%. By controlling the oxygen concentration, a predetermined amount of hydrocarbon per exhaust gas volume can be as

Cleaning result can be achieved, which is essentially constant, even if the activity of the hydrocarbon reservoir changes. The

Oxygen concentration is therefore preferably controllable in such a way that a

The cleaning result of the exhaust gas cleaning arrangement is essentially constant.

It is preferred that the exhaust gas purification arrangement is set up to determine a partial gas concentration in the exhaust gas downstream of the hydrocarbon reservoir as the information in order to determine the oxygen concentration in

To control dependence on the specific partial gas concentration. A preferred partial gas of the exhaust gas is oxygen, so that a preferred partial gas concentration is an oxygen concentration. Another preferred partial gas of the exhaust gas is hydrocarbon, so another preferred partial gas concentration is a hydrocarbon concentration. The are particularly preferred

Information determined as a measure of the activity of the hydrocarbon storage. The exhaust gas makes it easy to draw a conclusion about the activity of the hydrocarbon reservoir. Is the

Hydrocarbon storage amount per hydrocarbon storage

Time interval high, a comparatively low downstream

Hydrocarbon concentration or a comparatively high one Oxygen concentration in the exhaust gas can be determined. Is the

Hydrocarbon storage amount per hydrocarbon storage

Time interval low or even negative, a comparatively high hydrocarbon concentration or a comparatively low becomes downstream

Oxygen concentration in the exhaust gas can be determined. The oxygen concentration can be controlled accordingly, i.e. at high

Hydrocarbon concentration or low oxygen concentration a higher oxygen supply can be provided and at lower

Hydrocarbon concentration or high oxygen concentration a lower oxygen supply can be provided. The control of the oxygen concentration is preferably set up proportional to the activity of the hydrocarbon reservoir.

It is preferred that the exhaust gas purification arrangement downstream of the

Hydrocarbon storage has a sensor that determines a partial gas concentration measurement result as the information. Knowing only a partial gas concentration may be sufficient to know whether the amount of oxygen in the exhaust gas needs to be adjusted by control. This means that the complete composition of the exhaust gas does not have to be monitored.

Some embodiments provide that the sensor is sensitive to oxygen to determine the partial gas concentration measurement result. Some

Embodiments provide that the sensor is hydrocarbon sensitive to determine the partial gas concentration measurement result. Sensors for these partial gases of the exhaust gas are readily available and can be used in the exhaust gas cleaning arrangement. The exhaust gas purification arrangement preferably has as the sensor an oxygen concentration sensor downstream of the

Hydrocarbon storage on the as the information

Oxygen concentration measurement result determined. The

The oxygen concentration measurement result is preferably one

Oxygen concentration in the exhaust gas. Preferably that is

Oxygen concentration measurement result used to control the oxygen concentration depending on the information, in particular the oxygen concentration in the exhaust gas. Does the oxygen concentration sensor do that

Oxygen concentration measurement result ready, the activity of the

Hydrocarbon storage can not be determined directly on the basis of its performance data in a complicated manner, but can simply be obtained in particular via the Oxygen concentration in the exhaust gas can be determined. The

In some embodiments, the exhaust gas purification arrangement has a nitrogen oxide sensor with hydrocarbon cross-sensitivity as the sensor, which is arranged downstream of the hydrocarbon reservoir and which determines a hydrocarbon concentration measurement result as the information. For the nitrogen oxide sensor, the above applies mutatis mutandis

Written oxygen concentration sensor.

The sensor is preferably in the exhaust gas path between the

Hydrocarbon storage and the multi-way catalyst arranged. This allows the partial gas concentration measurement result to be determined before the exhaust gas reaches the multi-way catalyst. This enables efficient control of the oxygen concentration. In some embodiments, however, the sensor is arranged downstream of the multi-way catalytic converter, in particular arranged at an outlet of the exhaust gas cleaning arrangement. Then she can

Exhaust gas oxygen concentration depending on the

Readjust the oxygen concentration of the exhaust gas released into the environment. Some embodiments see a first sensor that

Reusable catalyst is upstream, and a second sensor that the

Multi-way catalyst is downstream. So it can

The hydrocarbon removal rate of the exhaust gas aftertreatment device can be monitored particularly reliably because two sensors are present which can measure the partial gas concentration at different points along the exhaust gas path. The sensors can each be sensitive to a different partial gas of the exhaust gas.

The sensor is preferably located immediately downstream of the hydrocarbon reservoir. So changes in the

Exhaust gas composition can be detected, which are attributable to the hydrocarbon storage.

It is preferred that the sensor is oriented at an angle of less than 90 ° and greater than 0 ° against the exhaust gas path. A sensor measuring surface is therefore preferably directed in the direction of the hydrocarbon reservoir, so that preferably a normal vector of the sensor measuring surface with a

Directional component points to the hydrocarbon storage. Preferably the angle is between 40 ° and 60 °, in particular 45 °. A particularly meaningful measurement result can be obtained in this way.

It is preferred that the exhaust gas purification arrangement has a secondary air pump in order to introduce secondary air into the exhaust gas path. In embodiments, a fuel-air mixture for the internal combustion engine can be adjusted based on the information. The oxygen concentration is usually influenced by an external engine control unit which provides the fuel / air mixture for the internal combustion engine of the vehicle. If the

Oxygen concentration in the exhaust gas can no longer be increased sufficiently by adapting the fuel-air mixture for the internal combustion engine, for example because otherwise the fuel-air mixture would become too lean, can downstream of the internal combustion engine, preferably in the

Exhaust gas purification arrangement, into the secondary air through the exhaust gas path

Secondary air pump can be supplied to increase the oxygen concentration. This situation can occur, for example, when the internal combustion engine is already operating on a particularly lean fuel / air mixture and at the same time the hydrocarbon storage device introduces a large amount of hydrocarbon into the exhaust gas. The secondary air pump is preferably set up to provide ambient air to the exhaust gas purification arrangement in order to increase the oxygen concentration in the exhaust gas if necessary. It is particularly preferred that the secondary air pump in the exhaust gas path between the

Hydrocarbon storage and the multi-way catalyst is arranged.

The hydrocarbon reservoir is preferably set up for

To store hydrocarbon from the exhaust gas, in particular at a first temperature, and to return it to the exhaust gas, in particular at a second temperature that is higher than the first temperature. This ensures reliable operation of the hydrocarbon reservoir. The first

Temperature and the second temperature are preferably operating temperatures of the exhaust gas purification arrangement or of the multi-way catalytic converter. As an alternative to this, the hydrocarbon reservoir can be set up to release hydrocarbon taken up from the exhaust gas back into the exhaust gas by triggering an active regeneration.

Embodiments provide that the exhaust gas purification arrangement has a housing which encloses the exhaust gas path. Preferably encloses the housing the exhaust gas path radially. The housing preferably provides an essentially cylindrical exhaust gas tunnel for the exhaust gas path. The hydrocarbon reservoir, the reusable catalytic converter, the sensor and

preferably further elements such as heating catalysts can be arranged. For example, all components of the exhaust gas cleaning arrangement can be provided and enclosed in a single compact component.

The exhaust gas cleaning arrangement, which has the housing, particularly preferably forms a motor vehicle catalytic converter assembly, which preferably has the outlet of the exhaust gas cleaning arrangement, which can preferably be connected to an end pipe of the motor vehicle. A sensor housing of the sensor preferably penetrates the housing. In some embodiments, the sensor is arranged on an inner wall of the housing. So the sensor can be stably mounted on the housing.

Embodiments provide that the exhaust gas purification arrangement one

Control unit contact, which can be connected to an external control unit in order to forward the information to the external control unit. The

The control unit contact is preferably set up to route a data line, which is connected to the sensor for signaling purposes, to output the information. The external control unit is preferably one

Motor control unit of the motor vehicle. Instead, some embodiments provide an internal control unit which is arranged in the exhaust gas purification arrangement separately from the exhaust gas path.

A preferred multi-way catalyst is a three-way catalyst. The multi-way catalytic converter is preferably heated, in particular by a heating element integrated therein or a heating catalytic converter upstream in the exhaust gas path or a heating element upstream in the exhaust gas path. The upstream heating catalytic converter can be a further multi-way catalytic converter, in particular a three-way catalytic converter. It is particularly preferred that the sensor in the exhaust gas path between the

Hydrocarbon storage and the multi-way catalyst is arranged.

The exhaust gas path is thus preferably arranged such that the exhaust gas on the exhaust gas path first passes through the hydrocarbon reservoir, then the sensor and then the multi-way catalytic converter. This enables a very efficient and effective purification of the exhaust gas, in particular with regard to hydrocarbons. The object of the invention is further achieved by a motor vehicle of the type mentioned at the outset, the exhaust gas purification arrangement being set up to obtain information about an exhaust gas composition of the exhaust gas downstream of the hydrocarbon reservoir.

A better knowledge of the exhaust gas composition in the

Exhaust gas purification arrangement downstream of the hydrocarbon reservoir allows the operation of the motor vehicle to be made more efficient and, if necessary, in particular to influence the exhaust gas composition by adapting the operation, taking legal requirements into account.

The motor vehicle is preferably set up to control an oxygen concentration in the exhaust gas as a function of the information. If one preferably controls the oxygen concentration depending on the information, it can be ensured that the cleaning performance of the

Exhaust gas purification arrangement is appropriate to sufficiently purify the exhaust gas from hydrocarbon. In this way it can in particular be prevented that the exhaust gas purification arrangement, in particular because of the

upstream hydrocarbon storage too little or too much

Provides cleaning performance. A hydrocarbon peak in an end pipe of the motor vehicle can thus also be effectively prevented. In this way, the motor vehicle can become more efficient and can work more economically.

It is particularly preferred that the motor vehicle is set up for one

Partial gas concentration in the exhaust gas downstream of the hydrocarbon reservoir as the information to be determined and the oxygen concentration in

To control dependence on the specific partial gas concentration. So the activity of the hydrocarbon storage can be easily based on the

Partial gas concentration of the exhaust gas can be determined, the

Hydrocarbon storage has happened. For this purpose, a sensor is preferably provided, which detects the hydrocarbon reservoir in the exhaust gas path

downstream, in particular immediately downstream. The sensor is

preferably upstream of the multi-way catalyst.

The motor vehicle preferably has an engine control unit which is set up for a fuel / air mixture for an internal combustion engine

provide that based at least in part on the information is put together to control the oxygen concentration in the exhaust gas. For this purpose, it is preferably provided that the engine control unit is connected to the sensor in terms of signal technology, in particular via a data cable, in order to receive the information from the sensor.

The motor vehicle is preferably a hybrid vehicle. Preferred

Hybrid vehicles include an electric motor and the internal combustion engine, in particular a gasoline engine or a diesel engine. Especially

Hybrid vehicles can be driven off the road especially when starting with high loads

benefit from increased efficiency of the exhaust gas cleaning arrangement. The

Internal combustion engine is preferably with the inlet of the

Exhaust gas purification arrangement connected to the exhaust gas to the

To provide exhaust gas purification arrangement. The exhaust gas arises, at least in part, from the combustion of fuel in the internal combustion engine.

Further possible configurations and possible advantages of the motor vehicle result analogously to the explanations above with regard to the

Emission control arrangement.

In the following, the invention is illustrated by means of a non-restrictive

Embodiment and described with reference to the accompanying drawings, in which:

Fig. 1 shows a schematic cross section through an embodiment of the

Exhaust gas purification arrangement according to the invention along the exhaust gas path.

The following detailed description of the exemplary embodiment, the accompanying drawings and the appended claims, which define the scope of the invention, are for better readability

Reference numerals have been inserted, but are not intended to have any restrictive effect.

1 shows an exhaust gas purification arrangement 1 for a motor vehicle. The

Exhaust gas purification arrangement 1 is installed in a hybrid vehicle, which is not shown further for the sake of simplicity. The hybrid vehicle has an electric motor, not shown, and an internal combustion engine, not shown, namely a diesel engine. The diesel engine is with an inlet 2 io

Exhaust gas purification arrangement 1 connected to the exhaust gas for purification

Provide exhaust gas purification arrangement 1.

The exhaust gas purification arrangement 1 has a hydrocarbon reservoir 3 and a reusable catalytic converter 4, the reusable catalytic converter 4 being the

Hydrocarbon reservoir 3 is downstream in an exhaust gas path 5, which an exhaust gas follows through the exhaust gas purification arrangement 1.

During operation, the exhaust gas flows from the inlet 2 along the exhaust gas path 5, first through the hydrocarbon reservoir 3 and then through the reusable catalytic converter 4, and finally occurs at least partially cleaned, that is, with a changed exhaust gas composition and reduced amount of pollutants compared to the exhaust gas composition at the inlet 2, from an outlet 6 from the exhaust gas purification arrangement 1. A heating catalytic converter 7 is immediately upstream of the multi-way catalytic converter 4 in the exhaust gas path 5. The heating catalyst 7 heats the downstream multi-way catalyst 4. In some

In embodiments, the heating catalytic converter 7 is simply replaced by a heating element or the reusable catalytic converter 4 comprises an integrated heating function. The multi-way catalytic converter 4 is an example of a three-way catalytic converter. The

Exhaust gas purification arrangement 1 has a housing 8, which encloses the exhaust gas path 5, namely radially.

The hydrocarbon reservoir 3 is set up to store hydrocarbons from the exhaust gas at a first temperature and to release them again into the exhaust gas at a second temperature that is higher than the first temperature. The exhaust gas purification arrangement 1 is set up to provide information about an exhaust gas composition of the exhaust gas downstream of the

To receive hydrocarbon storage 3.

The exhaust gas purification arrangement 1 is intended to be a

Control oxygen concentration in the exhaust gas depending on the information. This ensures that the exhaust gas purification arrangement 1 takes into account the activity of the hydrocarbon reservoir 3

appropriate, preferably substantially constant, cleaning performance works. For example, hydrocarbon peaks in an end pipe (not shown) of the motor vehicle, to which the exhaust gas purification arrangement 1 supplies the exhaust gas via the outlet 6, can be avoided. The exhaust gas purification arrangement 1 is set up to have a partial gas concentration in the exhaust gas downstream of the hydrocarbon reservoir 3 as that

Determine information to control the oxygen concentration depending on the determined partial gas concentration. In order to obtain the information, the exhaust gas purification arrangement 1 points downstream of the

Hydrocarbon storage 3 on a sensor 9, which determines a partial gas concentration measurement result in the exhaust gas as the information. In the present exemplary embodiment, sensor 9 is sensitive to oxygen in order to

Partial gas concentration measurement result to determine and is therefore a

Oxygen concentration sensor, namely a lambda sensor.

The determined oxygen concentration measurement result is then transmitted to a control unit (not shown) of the vehicle via a control unit contact 10 in order to adapt a fuel / air mixture of the diesel engine, thereby controlling the oxygen concentration in the exhaust gas. The

Control unit contact 10 is connected to sensor 9 by means of a data cable

signal-connected in order to be able to provide the information via the control unit contact 10. The sensor 9 is arranged in the exhaust gas path 5 between the hydrocarbon reservoir 3 and the multi-way catalytic converter 4. The sensor 9 is also upstream of the heating catalytic converter 7 in the exhaust gas path 5. The sensor 9 is also immediately downstream of the hydrocarbon reservoir 3 in the exhaust gas path 5. The sensor 9 is oriented at an angle of less than 90 ° and greater than 0 ° against the exhaust gas path 5, namely at an angle of approximately 45 ° in order to enable meaningful measurement.

If the oxygen concentration downstream of the hydrocarbon reservoir 3, which is determined by the sensor 9, is comparatively high, then a richer one is triggered by the control unit of the motor vehicle

Fuel air mixture provided for the internal combustion engine. Is the

Oxygen concentration downstream of the hydrocarbon reservoir 3, which is determined by the sensor 9, but is comparatively low, a leaner fuel-air mixture is then provided for the internal combustion engine, prompted by the control unit of the motor vehicle.

The activity of the hydrocarbon reservoir 3 influences the

Oxygen concentration in the exhaust gas. Is the activity a recording of

Hydrocarbon in the hydrocarbon storage 3, then the Oxygen concentration behind the hydrocarbon reservoir 3, which is determined by the sensor 9, is comparatively high. The fuel / air mixture can then be made correspondingly more enriched by the control unit of the motor vehicle. If, on the other hand, the activity is a discharge of hydrocarbon from the hydrocarbon store 3 into the exhaust gas, then that is

Oxygen concentration downstream of the hydrocarbon reservoir 3, which is determined by the sensor 9, is comparatively low. The fuel / air mixture should then be correspondingly leaner by the control unit of the

Motor vehicle are provided to the internal combustion engine.

It may happen that the oxygen concentration in the exhaust gas is determined by the sensor 9 to be relatively low, but the fuel-air mixture of the internal combustion engine cannot be controlled even leaner by the control unit of the motor vehicle without impairing internal combustion engine performance too much.

For example in this case, the exhaust gas purification arrangement 1 has a

Secondary air pump 1 1 on. The secondary air pump 1 1, like the sensor 9, is between the hydrocarbon reservoir 3 and the example

Multi-way catalyst 4 arranged. The secondary air pump 1 1 is that

Meat catalyst 7 upstream in the exhaust gas path. The secondary air pump 1 1 is arranged to introduce ambient air into the exhaust gas path 5. Thus, the oxygen concentration in the exhaust gas can be increased before being released to the environment, if necessary, without making the internal combustion engine of the motor vehicle too lean

Supply fuel air mixture.

In other words, it is shown that the exhaust gas purification arrangement 1 between the FIC adsorber, that is to say the hydrocarbon reservoir 3, and the three-way catalytic converter 4 has a lambda probe as sensor 9, which is used for regulating the amount of oxygen. Should the air over the

Internal combustion engine is not sufficient, then this can also be caused by

Secondary air pump 1 1 are supplied. By shifting the measurement of the stoichiometry to the HC adsorber 3, the hydrocarbons emitted by the HC adsorber 3 are also taken into account in the control and thus the risk of HC peaks in the tail pipe, not shown, is reduced. In embodiments not shown, the sensor 9 is a nitrogen oxide sensor with HC cross sensitivity instead of the lambda sensor. This measures instead of the

Oxygen concentration is the hydrocarbon concentration in the exhaust gas. The hydrocarbon concentration in the exhaust gas downstream of the

Hydrocarbon storage 3 can be relatively high if the

Oxygen concentration in the exhaust gas downstream of the

Hydrocarbon storage 3 is relatively low and vice versa. The above explanations for the lambda sensor also apply mutatis mutandis to the nitrogen oxide sensor with HC cross-sensitivity. The exhaust gas purification arrangement 1 can have particular advantages in hybrid vehicles in RDE operation.

Claims

1. exhaust gas purification arrangement (1) for a motor vehicle, the one

Having a hydrocarbon reservoir (3) and a reusable catalyst (4), the reusable catalyst (4) being arranged downstream of the hydrocarbon reservoir (3) in an exhaust gas path (5), which an exhaust gas follows through the exhaust gas purification arrangement (1),

characterized in that

the exhaust gas purification arrangement (1) is set up for this,

Obtain information about an exhaust gas composition of the exhaust gas downstream of the hydrocarbon reservoir (3).

2. Exhaust gas cleaning arrangement (1) according to claim 1, characterized in that the exhaust gas cleaning arrangement (1) is provided for one

Control oxygen concentration in the exhaust gas depending on the information.

3. exhaust gas purification arrangement (1) according to claim 2, characterized in that the exhaust gas purification arrangement (1) is set up for a

Partial gas concentration in the exhaust gas downstream of the

Hydrocarbon storage (3) as the information to determine the oxygen concentration depending on the determined

Control partial gas concentration.

4. Exhaust gas purification arrangement (1) according to one of the preceding claims, characterized in that the exhaust gas purification arrangement (1) downstream of the hydrocarbon reservoir (3) has a sensor (9) which determines a partial gas concentration measurement result as the information.

5. Exhaust gas purification arrangement (1) according to claim 4, characterized in that the sensor (9) is sensitive to oxygen and / or hydrocarbon in order to determine the partial gas concentration measurement result.

6. exhaust gas purification arrangement (1) according to claim 4 or 5, characterized

characterized in that the sensor (9) is arranged in the exhaust gas path (5) between the hydrocarbon reservoir (3) and the reusable catalyst (4).

7. exhaust gas cleaning arrangement (1) according to one of claims 4 to 6, characterized in that the sensor is oriented at an angle of less than 90 ° and greater than 0 ° against the exhaust gas path (5).

8. Exhaust gas purification arrangement (1) according to one of the preceding claims, characterized in that the exhaust gas purification arrangement (1) has a secondary air pump (11) in order to introduce secondary air into the exhaust gas path.

9. Motor vehicle having an exhaust gas purification arrangement (1) according to claim 1, with an internal combustion engine of the motor vehicle

is connected.

10. Motor vehicle according to claim 9, characterized in that

the motor vehicle is set up to control an oxygen concentration in the exhaust gas as a function of the information.