KR102557632B1 - SCR Catalytic Converter System and Method for Diagnosis thereof - Google Patents

Abstract

The present invention relates to a method for diagnosing an SCR catalytic converter system, wherein the method is a collection step of collecting operating state data of a pump and/or metering module of a transfer module of the SCR catalytic converter system, stored in a cloud memory and a collection step 100 in which not only existing operating state data is collected, but also recent operating state data collected by the pump of the transfer module and/or the control device of the metering module. The old operating state data is compared with recent operating state data of the pump and/or metering module of the transfer module (120). Furthermore, based on the comparison 120 of the current operating state data with the old operating state data, it is determined whether the pump and/or metering module of the transfer module is fully functional or requires maintenance (130 ).
The invention also relates to an SCR catalytic converter system for exhaust gases of an internal combustion engine, which is configured to carry out the method described above. The SCR catalytic converter system includes a storage tank for storing a reducing agent to be metered into an exhaust gas line of an internal combustion engine, and the storage tank is connected to a metering supply module disposed in the exhaust gas line through a transfer module including a pump, The control device of the SCR catalytic converter system is configured to be connected with cloud memory.

Description

SCR Catalytic Converter System and Method for Diagnosis

The present invention relates to a method for diagnosis of an SCR catalytic converter system. The invention also relates to an SCR catalytic converter system for carrying out the method. Further, the present invention relates to a computer program that executes each step of the method when executed on a computer, and a machine-readable storage medium storing the computer program. Finally, the invention relates to an electronic control device configured to carry out the method.

In particular, in order to satisfy increasingly stringent exhaust gas regulation laws for automobiles, it is necessary to reduce the content of nitrogen oxides (NO _x ) in exhaust gas of internal combustion engines. To this end, an SCR (Selective Catalytic Reduction) disposed in the exhaust gas region of the internal combustion engine is known, and the SCR catalytic converter reduces nitrogen oxides contained in the exhaust gas of the internal combustion engine to nitrogen in the presence of a reducing agent. do. To carry out the reaction, ammonia (NH ₃ ) is required as a reducing agent or reactant to be mixed in the exhaust gas. For the supply of ammonia, usually, commercially available urea water (HWL) under the name AdBlue ^® consisting of 1/3 urea as an ammonia separation reagent and 2/3 water is used.

Immediately upstream of the SCR catalytic converter, a nozzle injects the liquid into the exhaust stream. At the injection site, the ammonia (NH ₃ ) required for further reaction is produced from urea. In the SCR catalytic converter, nitrogen oxides and ammonia in the exhaust gas combine to form water and non-toxic nitrogen. The efficiency of an SCR catalytic converter is dependent on temperature, space velocity and, most importantly, the ammonia charge level of the SCR catalytic converter.

The method herein is used for the operation of SCR catalytic converter systems, and in particular for diagnosis of SCR catalytic converter systems. Diagnosis means fault detection in which it is analyzed whether maintenance of the SCR catalytic converter system, in particular the pump and/or metering module of the transport module of the SCR catalytic converter system, is required.

The method herein includes the following steps. In a first step, operating state data of the SCR catalytic converter system, in particular the pump and/or metering module of the delivery module of the SCR catalytic converter system, are collected. In this case, not only the old operating state data stored in the cloud memory, but also the latest operating state data collected by the pump of the transfer module and/or the control device of the metering module are collected.

Operating state data may refer to physical variables that may characterize the operating state of the SCR catalytic converter system and may be measured within the SCR catalytic converter system. In particular, the operating state data of the SCR catalytic converter system is operating state data of components of the SCR catalytic converter system.

There are two types of operational status data. One of them is existing operating state data, and the other is so-called recent operating state data. Existing operating state data is stored in the cloud memory. The cloud memory is also referred to as an automotive cloud. The cloud memory holds information about the operating states of components of SCR catalytic converter systems of different automobile manufacturers with different configurations under various operating conditions. In addition to existing operating state data, there is also the concept of recent operating state data, which may contain all operating state data of the SCR catalytic converter system in question, in particular all operating state data of the components of the SCR catalytic converter system.

Typically, the old operating state data contains much more data than the latest operating state data, since the latest operating state data usually relates only to the respective SCR catalytic converter system of a specific internal combustion engine deployed in a particular vehicle. am. In contrast, existing operating state data is associated with all possible different SCR catalytic converter systems, and therefore also includes a number of different operating state data of all possible components of said SCR catalytic converter systems.

In the second step of the method, the existing operating state data is compared with the latest operating state data of the SCR catalytic converter system, in particular the pump of the transfer module and/or the metering module. The comparison may relate to each piece of information of operating state data.

Statistical data, in particular of operating state data, can also be compared with each other. Statistical data means, for example, the average value of different measured values, the standard deviation, the expected value of a particular physical variable, or a correlation. By utilizing the correlation, it is possible to establish a comparison of physical variables that exist only in recent operating state data or only in existing operating state data.

In order to estimate a correlation between the first physical variable of the recent operating state data and the first physical variable of the old operating state data when the first physical variable exists only in the old operating state data and not in the recent operating state data, for example A second physical variable of the latest operating state data that has a known correlation with the first physical variable of the latest operating state data may be used.

In the third step of the present method, based on the comparison of the current operating state data with the old operating state data, the SCR catalytic converter system, in particular the pump of the transfer module and/or the metering module, is fully functional, or maintenance is needed or not is determined. For comparisons to be made, the rules are determined under which circumstances the components of the SCR catalytic converter system, in particular the pumps of the transfer module and/or the metering module, will function perfectly. In addition, or alternatively, rules can also be determined when components of the SCR catalytic converter system require maintenance.

In the method of the present application, the diagnosis of when a component of the SCR catalytic converter system requires maintenance is based on a large amount of statistical data stored in cloud memory, and accesses only data supplied from the SCR catalytic converter system itself. It has the advantage that it can be performed much more accurately than in the case of an SCR catalytic converter system that can

According to a preferred embodiment, a component of the SCR catalytic converter system if, as a result of the comparison described in step 2, a given physical measured value of the latest operating state data differs from the old operating state data by more than a preset value. requires maintenance. 200%, 150%, 100%, 60%, 30%, 20%, 10%, 5%, 3%, 2% and 1% in particular come into consideration as preset values. Depending on the physical measurement used, different pre-set values are created for the aforementioned difference. This embodiment has the advantage that, for each physical measurement value, it is only necessary to compare the preset value, which depends on the existing operating state data, with the physical measurement value of the latest operating state data to determine when maintenance is required. there is.

Preferably, the operating state data also includes operating state data of the exhaust gas line. The operating state data of the exhaust gas line may include, for example, the temperature of the exhaust gas at a given point in the exhaust gas line, or the concentration of a given gas at a given point in the exhaust gas line, for example. In this case, the advantage is that exhaust gas data can also be used to more accurately characterize the SCR catalytic converter system.

According to one embodiment, the existing operating state data is preferably not collected by the control device of the SCR catalytic converter system, in particular by the control device of the transfer module and/or the control device of the metering module. This achieves that, for comparison of the latest operating state data with the existing operating state data, the existing operating state data is not affected by the latest operating state data.

Also preferably, the existing operating state data includes general operating state data in different vehicle types and in the components of the SCR catalytic converter system. The concept of vehicle type also means in particular different configurations of the same model vehicle. By general operating state data we also mean statistics and value ranges that are considered general. It is thereby achieved that existing operating state data contains reliable and accurate statistics for SCR catalytic converter systems common in the industry.

According to one preferred embodiment, the operational state data of the pumps of the transport module are inter alia among the following variables: suction capacity; pump speed; the time required for the pressure to reach a preset level; the behavior of pressure as a function of time; and variables derived therefrom; current required by the pump as a function of time; total current required by the pump to build a preset pressure; parameters or characteristics related to the current supply of the pump; fluid transport as a function of time; number of system startups; number of operating hours; time to pressure build-up at start-up; operating temperature of the transfer module; fluid delivery based on the duty cycle of the pump motor control applied over time; and, in particular, the duty cycle of the pump motor as a function of the delivery quantity when the delivery quantity is dissipated; contains one or more variables among An advantage of this embodiment is that the aforementioned operating state data of the pump of the transfer module reliably characterizes said pump.

A derived variable of the pressure behavior as a function of time means in particular a minimum value, a maximum value, any other statistic, or another variable which can be calculated from the aforementioned function.

According to one preferred embodiment, the operating state data of the metering module of the SCR catalytic converter system is inter alia: metered quantity based on the duty cycle of the pump motor control applied over time; metering frequency; number of operating hours; and the operating temperature of the metering module; contains one or more variables among An advantage of this embodiment is that the operating state data described above reliably characterize the metering module of the SCR catalytic converter system.

According to another embodiment, the degree of wear, preferably based on a comparison of one or more physical parameters of each of the last operating state data and the previous operating state data, for the pump of the conveying module and/or for the metering module, is is calculated This embodiment shows that, through the calculation of wear and tear, a current SCR catalytic converter system characterized by recent operating state data can be compared in a simple type and manner to the expected state of a standard SCR catalytic converter system characterized by existing operating state data. There is an advantage to being In this case, the comparison is a simple comparison of two values, namely the wear rates of corresponding SCR catalytic converter systems.

According to another preferred embodiment, the comparison of the last operating state data of the pump and/or metering module of the conveying module with the previous operating state data relates to the last operating state of the pump of the conveying module and/or the metering module. This is done in such a way that the degree of wear is calculated based on one or more physical parameters of the data. This embodiment has the advantage that it does not require access to the cloud memory for calculating the degree of wear, and only the data of the current SCR catalytic converter system is used.

The degree of wear of the pump and/or metering module of the conveying module of the SCR catalytic converter system, corresponding to one or more physical variables of the last operating state data, is expected for the SCR catalytic converter system. is greater than the expected degree of wear, according to one preferred embodiment, it is determined that maintenance is required; otherwise, maintenance is deferred to a later point in time. In this case, there is an advantage in that the timing at which maintenance of the SCR catalytic converter system should be performed is matched with data of the latest operating state of the SCR catalytic converter system.

According to an alternative embodiment, the degree of wear of the pump and/or metering module of the transfer module of the SCR catalytic converter system, corresponding to one or more physical parameters of the last operating state data, is determined by the pump and/or metering module of the transfer module. If the degree of wear is greater than the threshold value, it is determined that maintenance is required; otherwise, maintenance is deferred to a later point in time. The threshold value is preferably calculated based on existing operating state data. This embodiment has the advantage that only one value, i.e., the threshold value of the degree of wear, needs to be compared with the physical measured value of the latest operating state data to determine when maintenance is required.

In this case, the expected wear of the components of the SCR catalytic converter system, corresponding to one or more physical variables of the latest operating state data, is determined as follows. Based on the existing operating state data in the cloud memory, an expected value of one or more physical variables of the recent operating state data is calculated. For this calculation, specific characteristic data of the SCR catalytic converter system, such as for example vehicle model or operating hours of the components of the SCR catalytic converter system, are taken into account.

According to one preferred embodiment, if maintenance is postponed to a later point in time, the period until the next maintenance is calculated based on a comparison of the existing operating state data with the latest operating state data. In this case, based on the comparison of the old operating state data with the recent operating state data, a predicted point in time at which a particular component of the SCR catalytic converter system will require maintenance is calculated. This calculation may also be performed for multiple or all components of the SCR catalytic converter system. This prevents unintentional failure of the car and allows defective components to be replaced at the very next maintenance session before they fail completely. In addition, maintenance intervals can be dynamically planned if the components show little or no wear.

Also, preferably, the period until the next maintenance is recalculated each time the operation of the SCR catalytic converter system starts. More preferably, during operation of the SCR catalytic converter system, the period until the next maintenance is dynamically matched to the latest operating state data of the SCR catalytic converter system. In this case, there is an advantage that the period until the next maintenance is always updated to the latest during operation of the SCR catalytic converter system.

Further preferably, the latest operating state data for the pumps of the transport module and/or for the metering module are at least partly, preferably all, loaded into the cloud memory. In this case, the advantage is that the existing operating state data is updated. This is especially important in the case of SCR catalytic converter systems, for example, which are operated in new vehicles or in conditions where only a small amount of operational status data exists. The existing operating state data thus updated can be used in subsequent evaluations, either by the current SCR catalytic converter system or by another user of the cloud memory.

According to one embodiment, the pump of the transport module is preferably a transport pump embodied as a membrane pump. Further preferably, the transfer module includes a recirculation pump. In this case, in particular, there is an advantage that not only can the reducing agent be transported to the SCR catalytic converter, but also that excess reducing agent can be recovered.

Another aspect of the present invention relates to an SCR catalytic converter system for an exhaust gas of an internal combustion engine, configured to perform the method described above. The SCR catalytic converter system includes a storage tank for storing a reducing agent to be metered into an exhaust gas line of an internal combustion engine, and the storage tank is connected to a metering module disposed in the exhaust gas line through a transfer module including a pump. . In addition, the SCR catalytic converter system includes a control device of the SCR catalytic converter system configured to be connected to the cloud memory. In the SCR catalytic converter system of the present application, like the method of the present application, diagnosis of when components of the SCR catalytic converter system will require maintenance is based on a large amount of statistical data stored in cloud memory, and only the SCR catalytic converter system It has the advantage that it can perform much more accurately than in the case of an SCR catalytic converter system, which has access to data supplied only by itself.

In particular, the present invention can be applied to an SCR exhaust gas aftertreatment system used in an Otto engine or a diesel engine of a vehicle, among other things. However, as is evident, the method of the present invention can also be applied with the advantages described herein in other SCR exhaust gas aftertreatment systems of corresponding internal combustion engines besides automotive engineering, for example in the field of marine engineering or chemical engineering.

The computer program of the present application is configured to perform each step of the method of the present application, particularly when executed on a computer or control device. This computer program enables the implementation of the method without making structural changes in conventional electronic control devices. To this end, the computer program is stored on a machine-readable storage medium.

By installing the computer program in a conventional electronic control unit, an electronic control unit configured to operate the SCR catalytic converter using the present method is obtained.

Further advantages and embodiments of the present invention refer to the following description and accompanying drawings.

As is evident, the features mentioned above and which will still be described below may be used not only in each specified combination, but also in another combination, or alone, without departing from the scope of the present invention.

Embodiments of the invention are shown in the drawings and described in more detail below.

1 is a schematic diagram of an SCR catalytic converter system that can be operated by a method according to one embodiment of the present invention.
2 and 3 are each a schematic diagram of a method according to an embodiment of the present invention.

1, an SCR catalytic converter system 10 including a metering device for metering and supplying urea water (HWL) 12 into the exhaust gas line 10 of an internal combustion engine 14 of a vehicle, which is only exemplified, is shown in FIG. is shown The SCR catalytic converter system 10 is used, in a known manner, to reduce nitrogen oxides in the exhaust gas of an internal combustion engine 14 using selective catalytic reduction (SCR). For reduction, the reducing agent (HWL) 12 is fed into the exhaust gas line 18 upstream of the SCR catalytic converter 20 and downstream of the oxidation catalytic converter 22 via the metering valve 16 of the metering module 17. sprayed into me

The HWL 12 is stored in a storage tank 24 comprising a fill level sensor 26 and a temperature sensor 28, each connected to a control device 29. The metering valve 16 of the metering supply module 17 is supplied with HWL 12 from the storage tank 24 by the transfer module 30 . The transfer module has a compressed air line (38), which is supplied with compressed air from a compressor (40) with an air storage tank (42).

The transfer module 30 includes a transfer pump 32 that discharges the HWL 12 from the storage tank 24 using a suction line 34 . The HWL (12) is led through a pressure line (36) to the metering valve (16) of the metering module (17). By means of the metering valve 16, HWL 12 is injected into the exhaust gas line 18 between the internal combustion engine 14 and the SCR catalytic converter 20.

At this time, the transfer pump 32 and the metering module 17 are controlled by the electronic control device 29. The exhaust gas temperature sensor 44 and the exhaust gas sensor 46, both of which are arranged downstream of the SCR catalytic converter 20, are likewise connected to the electronic control unit 29.

The control unit 29 of the SCR catalytic converter system 10 is wirelessly connected to the cloud memory 48 . This wireless connection is indicated in FIG. 1 by a broken line and two radio symbols between the control unit 29 of the SCR catalytic converter system 10 and the cloud memory 48 . In addition, the control device 29, using the method according to the invention, controls the SCR catalytic converter system 10, in particular the pump 32 and the metering module of the conveying module 30 of the SCR catalytic converter system 10. (17) is configured to operate.

2 shows a schematic flow diagram of one embodiment of the method according to the invention for diagnosis of an SCR catalytic converter system 10 .

In step 100, operational state data of the pump 32 and/or metering module 17 of the transfer module 30 of the SCR catalytic converter system 10 are collected. In this case, the collection of step 100 is not only the existing operating state data stored in the cloud memory 48, but also the pump 32 of the transfer module 30 and/or the control device of the metering module 17 ( 29) also includes recent operational status data collected by

In a next step 110 , additional operational state data of the exhaust gas line 18 are collected. In this case, the exhaust gas temperature sensor 44 and the exhaust gas sensor 46 supply the corresponding data of the exhaust gas line 18 .

In this case, the collection of step 100 is carried out by the control unit 29 of the SCR catalytic converter system 10 as well as the existing operating state data of the exhaust gas line 18 stored in the cloud memory 48. It also includes the latest operating state data of the exhaust gas line 18 to be.

Then, in step 120, the old operating state data is compared with the latest operating state data of the pump 32 and/or metering module 17 of the transfer module 30.

In the very next step 130, based on the comparison of the current operational status data with the old operational status data, whether the pump 32 and/or the metering module 17 of the transfer module 30 is fully functional; or whether maintenance is required.

If at this step 130 it is determined that maintenance is required, the method continues at step 140 where the diagnostic result indicates that maintenance is required.

If it is determined at step 130 that maintenance is not required, the method continues at step 150 where a query is made as to whether a maintenance period has elapsed. If the maintenance interval has elapsed, the present method continues to step 140, where the diagnostic result indicates that maintenance is required. If the maintenance period has not yet elapsed, the method continues with step 160, where the diagnostic result indicates that maintenance is not required. Also, in this step, the point at which the next maintenance should be performed is calculated based on the comparison between the existing operating state data and the latest operating state data.

3 shows a schematic flow diagram of another embodiment of the method according to the invention for diagnosis of an SCR catalytic converter system.

In step 101, existing operating state data of the pump 32 of the transfer module 30 and/or the metering module 17 of the SCR catalytic converter system 10, stored in the cloud memory 48, are collected. do. In a subsequent step 102 , the latest operational status data is read by the pump 32 of the transfer module 30 and/or the control device 29 of the metering module 17 .

In a next step 110, additional operational state data of the exhaust gas line 18 is collected. In this case, the collection of step 100 is carried out by the control unit 29 of the SCR catalytic converter system 10 as well as the existing operating state data of the exhaust gas line 18 stored in the cloud memory 48. It also includes the latest operating state data of the exhaust gas line 18 to be.

Then, in step 111 , the latest operating state data for the pump 32 , the metering module 17 and the exhaust gas line 18 of the transfer module 30 are loaded into the cloud memory 48 .

In the very next step 121, a comparison of a preset number of physical variables of the current operating state data and the old operating state data is performed for the pump 32 of the transfer module 30 and for the metering module 17. Based on this, the degree of wear is calculated. Accordingly, the degree of wear of the pump and the degree of wear of the metering module are obtained. The physical parameter of the pump 32 of the transfer module 30 may be, for example, the suction capacity.

In a subsequent step 122, the expected wear of the pump 32 of the transfer module 30 and the metering module 17 for the SCR catalytic converter system 10, based on the existing operating state data in the cloud memory. is calculated

In the next step 123, the expected wear rate of the pump 32 of the transfer module 30 and the wear rate of the metering supply module 17 calculated in step 121 are The degree of wear and the expected degree of wear of the metering module 17 are compared. If the respective wear to the pump 32 of the transfer module 30 or to the metering module 17 is greater than the respective expected wear, the method of the present invention, as a diagnostic result, indicates that maintenance is required. It continues to step 140 to become.

As an alternative to the expected wear value, a threshold value of eg 90% of the wear value can also be used.

If the respective wear on the pump 32 of the transfer module 30 and on the metering module 17 is less than the respective expected wear, then the method of the present invention determines whether a maintenance interval has elapsed or not. The process continues with step 150 being executed. If the maintenance interval has elapsed, the present method continues to step 140, where the diagnostic result indicates that maintenance is required. If the maintenance period has not yet elapsed, the method continues with step 160, where the diagnostic result indicates that maintenance is not required. Also, in this step, the point at which the next maintenance should be performed is calculated based on the comparison between the existing operating state data and the latest operating state data.

Claims (14)

A method for diagnosing an SCR catalytic converter system 10,
a. As a step of collecting operating state data of the pump 32 and/or metering supply module 17 of the transfer module 30 of the SCR catalytic converter system 10, the existing operating state data stored in the cloud memory 48 as well as collecting (100) recent operational status data collected by the pump (32) of the transfer module (30) and/or the control device (29) of the metering module (17);
b. a comparison step 120 of comparing current operating state data of the pump 32 and/or metering module 17 of the transfer module 30 with existing operating state data;
c. Based on the comparison 120 of the latest operational status data with the previous operational status data, it is determined whether the pump 32 and/or metering module 17 of the transfer module 30 is fully functional or maintenance-free. Including; step 130 of determining whether it is necessary,
The existing operating state data stored in the cloud memory 48 includes standard operating state data common in different vehicle types and in the components of the SCR catalytic converter system 10;
The latest operating state data for the pump 32 of the transfer module 30 and/or for the metering module 17 is at least partially loaded into the cloud memory 48 to update said existing operating state data, and update The method of diagnosis of an SCR catalytic converter system, characterized in that the existing operating state data being used for subsequent evaluation by the current SCR catalytic converter system and by another user of the cloud memory. 2. The exhaust gas line (18) according to claim 1, when collecting operational state data of the pump (30) and/or metering module (17) of the transfer module (32) of the SCR catalytic converter system (10). The operating state data of the exhaust gas line collected by the controller 29 of the SCR catalytic converter system 10 as well as the existing operating state data of the exhaust gas line 18 stored in the cloud memory 48 are also collected. A method for diagnosing an SCR catalytic converter system, characterized in that the latest operating state data of (18) is also collected. 3. The method according to claim 1 or 2, wherein the existing operating state data stored in the cloud memory (48) is not collected by the control unit (29) of the transfer module (30) and/or the metering module (17). Characterized in that, a method for diagnosing an SCR catalytic converter system. delete 3. The operating state data of the pump (32) of the transfer module (30) according to claim 1 or 2, among the following variables: suction capacity; pump speed; the time required for the pressure to reach a preset level; the behavior of pressure as a function of time; and variables derived therefrom; current required by pump 32 as a function of time; the total current required by the pump 32 to build the preset pressure; parameters or characteristics related to the current supply of the pump 32; fluid transport as a function of time; number of system startups; number of operating hours; time to pressure build-up at start-up; the operating temperature of the transfer module 30; fluid delivery based on the duty cycle of the pump motor control applied over time; and the duty cycle of the pump motor as a function of delivery; A method for diagnosing an SCR catalytic converter system, characterized in that it includes one or more variables from among. 3. The method according to claim 1 or 2, wherein the operating state data of the metering module (17) of the SCR catalytic converter system (10) is based on the following variables: the duty cycle of the pump motor control applied over time. metered supply amount; metering frequency; number of operating hours; and the operating temperature of the metering module 17; A method for diagnosing an SCR catalytic converter system, characterized in that it includes one or more variables from among. 6. The comparison (120) of the current operating state data of the pump (32) and/or metering module (17) of the transport module (30) with the previous operating state data according to claim 5, wherein the pump (32) of the transport module (30) ( 32) and/or for the metering module 17, SCR, characterized in that the degree of wear is calculated based on a comparison of one or more physical parameters, respectively, of the latest operating state data and the old operating state data. Methods for diagnosing catalytic converter systems. 8. The method according to claim 7, wherein the degree of wear of the pump (32) and/or metering module (17) of the transfer module (30) of the SCR catalytic converter system (10), corresponding to one or more physical parameters of the latest operating state data, If it is greater than the expected wear of the pump 32 of the transfer module 30 and/or the metering module 17 expected for the SCR catalytic converter system 10, it is determined that maintenance is required; otherwise, A method for diagnosing an SCR catalytic converter system, characterized in that maintenance is deferred to a later point in time. 9. The SCR catalytic converter system according to claim 8, characterized in that, when maintenance is postponed to a later point in time, a period until the next maintenance is calculated according to a comparison of existing operating state data and recent operating state data. diagnostic method. delete An SCR catalytic converter system (10) for exhaust gas of an internal combustion engine (14), configured to carry out the method according to claim 1 or 2, said SCR catalytic converter system into an exhaust gas line of the internal combustion engine (14). It includes a storage tank 24 for storage of reducing agent 12 to be metered, the storage tank 24 being metered in the exhaust gas line 18 via a transfer module 30 including a pump 32. Connected to the supply module 17,
SCR catalytic converter system (10), wherein the control device (29) of the SCR catalytic converter system (10) is configured to be connectable with the cloud memory (48). A computer program stored on a machine-readable storage medium and configured to perform each step of the method according to claim 1 or 2. A machine-readable storage medium in which the computer program according to claim 12 is stored. Electronic control device (29) configured to operate the SCR catalytic converter system (10) using the method according to claim 1 or 2.

Images