A method for desulphurising a nitrogen oxide accumulator catalytic converter of an exhaust gas system that includes the nitrogen oxide accumulator catalytic converter and at least one selective catalytic reduction catalytic converter disposed downstream of the nitrogen oxide accumulator catalytic converter, of an internal combustion engine, where a desulphurisation strategy, on the basis of which the nitrogen oxide accumulator catalytic converter is desulphurised, is adjusted to the ageing of the nitrogen oxide accumulator catalytic converter.

A method for operating a particle filter of a vehicle includes creating an ash to be introduced into a filter body of the particle filter by arranging a carrier material of an ash former on an input side of an end face of the filter body, as viewed in a flow direction of an exhaust gas through the particle filter, and combusting the carrier material, where a non-combustible constituent of the ash former is arranged on the carrier material. The created ash is then introduced into the filter body of the particle filter.

Diagnostics for inadequate performance and/or degradation of an exhaust aftertreatment system are disclosed. A performance degradation analysis of the exhaust aftertreatment system includes a determination of a long term brake specific NOx value over a time period and a comparison of the long term brake specific NOx value to a threshold value.

Particulate filters are used to remove particulate matter such as soot and ash in the emissions control systems of vehicles, including gasoline direct injection (GDI) engines. Methods are provided to predict the long-term performance and durability of emissions control systems having particulate filters. The methods account for factors such as thermal aging, soot accumulation and regeneration, and ash loading.

Particulate filters are used to remove particulate matter such as soot and ash in the emissions control systems of vehicles, including gasoline direct injection (GDI) engines. Methods are provided to predict the long-term performance and durability of emissions control systems having particulate filters. The methods account for factors such as thermal aging, soot accumulation and regeneration, and ash loading.

A method for operating a particle filter of a vehicle includes creating an ash to be introduced into a filter body of the particle filter by arranging a carrier material of an ash former on an input side of an end face of the filter body, as viewed in a flow direction of an exhaust gas through the particle filter, and combusting the carrier material, where a non-combustible constituent of the ash former is arranged on the carrier material. The created ash is then introduced into the filter body of the particle filter.

Diagnostics for inadequate performance and/or degradation of an exhaust aftertreatment system are disclosed. A performance degradation analysis of the exhaust aftertreatment system includes a determination of a long term brake specific NOx value over a time period and a comparison of the long term brake specific NOx value to a threshold value.

Particulate filters are used to remove particulate matter such as soot and ash in the emissions control systems of vehicles, including gasoline direct injection (GDI) engines. Methods are provided to predict the long-term performance and durability of emissions control systems having particulate filters. The methods account for factors such as thermal aging, soot accumulation and regeneration, and ash loading.

Systems and methods for diagnosing at least one component in an exhaust aftertreatment system are provided. The system includes an exhaust aftertreatment system coupled to an engine system, at least one sensor, and at least one processing circuit structured to: receive initial sensor data; determine an initial parameter value based on the initial sensor data; determine that the initial parameter does not satisfy an initial threshold; perform operations to diagnose at least one component of the exhaust aftertreatment system comprising: causing the engine system to operate through a sequence of a plurality of engine outputs; receiving a plurality of sensor data, each of the plurality sensor data corresponding to at least one of the plurality of engine outputs; comparing each of the plurality of sensor data to a corresponding threshold; and diagnosing the at least one component based on the comparison.

A controller for an internal combustion engine is configured to execute a determination process that determines that a deviation between a first change amount and a second change amount during a fuel cutoff operation is less than or equal to a threshold, and an anomaly diagnosing process that determines that an exhaust purification device is in a detached state when the determination process determines that the deviation is less than or equal to the threshold. The first change amount and the second change amount are change amounts per unit time of the temperature of exhaust gas on the upstream side and the downstream side of the exhaust purification device, respectively. The controller is configured to interrupt the determination process when the upstream-side temperature increases within a determination period.