SCR catalyst system and method for diagnosis thereof

The invention relates to a method for the diagnosis of an SCR catalyst system, the method comprising the following steps: detecting operating state data of a pump of a conveyor module and/or a dosingmodule of the SCR catalyst system, wherein both existing operating state data stored in a cloud memory, as well as current operating state data, which are detected by a control unit of the pump of theconveyor module and/or the dosing module, are detected. The existing operating state data of the pump of the conveyor module and/or of the dosing module are compared with the current operating statedata. Further, based on comparison of the existing operating state data with the current operating state data, it is determined whether the pump of the conveyor module and/or the dosing module are functioning properly or whether maintenance is necessary. The invention further relates to the SCR catalyst system for the exhaust gas of an internal combustion engine, configured to perform the aforementioned method. 本发明涉及种用于对SCR