Controlling an exhaust gas aftertreatment system

An exhaust gas aftertreatment system (EATS) coupled downstream of an internal combustion engine comprised with a vehicle, the vehicle further arranged in communication with a control unit, wherein the control unit is arranged to:

• receive an indication of an upcoming reduction of an average speed for the vehicle as compared to a planned speed for the vehicle,
• determining, using the control unit, a duration of the upcoming reduction of the average speed for the vehicle,
• determine, only if the upcoming reduction of the average speed is above a predetermined speed threshold, an estimated temperature reduction at the EATS based on the upcoming reduction of the average speed,
• select a scheme for maintaining an exhaust gas temperature at a desired level to prevent a temperature reduction at the EATS based on the estimated temperature reduction, and
• only activate the selected scheme if the estimated temperature reduction is above a predetermined temperature threshold and the duration for the upcoming reduction of the average speed for the vehicle is below a predetermined duration, wherein:
• the selected scheme for preventing temperature reduction at the EATS is arranged to be essentially fuel consumption neutral to not impact negatively to an overall fuel consumption for the vehicle,
• the control unit is arranged to automatically select at least one scheme of a plurality of different schemes for preventing the temperature reduction at the EATS, and
• the at least one scheme of the plurality of schemes is selected based on the duration for the upcoming reduction of the average speed for the vehicle.

A computer program product comprising a non-transitory computer readable medium having stored thereon computer program means for controlling an exhaust gas aftertreatment system (EATS) coupled downstream of an internal combustion engine comprised with a vehicle, the vehicle further arranged in communication with a control unit, wherein the computer program product comprises:

• code for receiving, at the control unit, an indication of an upcoming reduction of an average speed for the vehicle as compared to a planned speed for the vehicle,
• code for determining, using the control unit, a duration of the upcoming reduction of the average speed for the vehicle,
• code for determining, using the control unit and only if the upcoming reduction of the average speed is above a predetermined speed threshold, an estimated temperature reduction at the EATS based on the upcoming reduction of the average speed,
• code for selecting, at the control unit, a scheme for maintaining an exhaust gas temperature at a desired level to prevent a temperature reduction at the EATS based on the estimated temperature reduction, and
• code for only activating, using the control unit, the selected scheme if the estimated temperature reduction is above a predetermined temperature threshold and the duration for the upcoming reduction of the average speed for the vehicle is below a predetermined duration, wherein:
• the selected scheme for preventing temperature reduction at the EATS is arranged to be essentially fuel consumption neutral to not impact negatively to an overall fuel consumption for the vehicle,
• the control unit is arranged to automatically select at least one scheme of a plurality of different schemes for preventing the temperature reduction at the EATS, and
• the at least one scheme of the plurality of schemes is selected based on the duration for the upcoming reduction of the average speed for the vehicle.