A treatment device an acquisition unit configured to acquire information indicating an estimated value of a deposition amount of ash deposited on a filter that collects a particulate matter in an exhaust gas of an engine, and information indicating an atmospheric pressure, a calculation unit configured to calculate an allowable ash deposition amount threshold value corresponding to an allowable ash deposition amount that changes according to the atmospheric pressure, a determination unit configured to determine that the filter needs to be cleaned in a case where the estimated value is greater than or equal to the allowable ash deposition amount threshold value, and a notification unit configured to issue a notification that the filter needs to be cleaned in a case where it is determined that the filter needs to be cleaned.

A method of controlling a particulate filter of an internal combustion engine is disclosed. A regeneration cycle of the particulate filter is initiated. During the regeneration, a value of an exhaust gas temperature at an outlet of the particulate filter is determined and a value of a residual soot quantity stored into the particulate filter is estimated on the basis of the measured value of the exhaust gas temperature at the outlet of the particulate filter. The regeneration cycle may be started and stopped based on the estimated residual soot quantity.

The present disclosure provides a method and apparatus for measuring ash deposit levels in a particulate filter comprising at least one cell. One or more indicator components is inserted into the at least one cell so as to lie upon any deposits contained therein. Radiation is emitted from a radiation source into the cell, and the position of the one or more indicator components is detected on the basis of the emitted radiation. The deposit level within the cell is then calculated on the basis of the position of the one or more indicator components.

A treatment device an acquisition unit configured to acquire information indicating an estimated value of a deposition amount of ash deposited on a filter that collects a particulate matter in an exhaust gas of an engine, and information indicating an atmospheric pressure, a calculation unit configured to calculate an allowable ash deposition amount threshold value corresponding to an allowable ash deposition amount that changes according to the atmospheric pressure, a determination unit configured to determine that the filter needs to be cleaned in a case where the estimated value is greater than or equal to the allowable ash deposition amount threshold value, and a notification unit configured to issue a notification that the filter needs to be cleaned in a case where it is determined that the filter needs to be cleaned.

A method includes initiating a low engine-out NOx (LEON) mode by controlling a component of a vehicle having an aftertreatment system to decrease an instantaneous engine-out NOx (EONOx) amount. The method also includes comparing a temperature of the aftertreatment system to a threshold temperature. The method also includes responsive to determining that the temperature of the aftertreatment system exceeds the threshold temperature, disengaging the LEON mode. The method also includes responsive to determining that the temperature of the aftertreatment system is below the threshold temperature, comparing a NOx value to a NOx value threshold. The method also includes disengaging the LEON mode responsive to determining that the NOx value exceeds the NOx value threshold.

An aftertreatment system includes a particulate filter configured to receive exhaust gas from an engine and a controller that measures an actual pressure drop across the particulate filter, determines an expected total ash accumulation rate in the particulate filter based on a current duty cycle of the engine, determines an expected pressure drop across the particulate filter based on the expected total ash accumulation rate, compares the expected pressure drop with the actual pressure drop, and determines whether an oil consumption rate in the engine is abnormal based on the comparison.

A system includes an exhaust aftertreatment system including a particulate filter and a controller. The controller is configured to: receive information comprising a temperature regarding a filter of the aftertreatment system; and responsive to determining that the temperature regarding the filter is below a temperature threshold, command the engine to operate according to a first firing fraction. The first firing fraction may define a number of active cylinders of the engine relative to a total number of cylinders of the engine, and correspond to a predetermined temperature value of the filter.