Abstract: A computer implemented method for controlling the operation of an engine system in a vehicle is provided. The engine system comprising an engine and an exhaust aftertreatment system for reducing at least NOx emissions of the exhaust gases from the engine using a reductant, the engine system comprising a plurality of engine system components configured to perform a plurality of NOx emission reducing activities.

Abstract: A method for controlling the operation of an engine system in a vehicle is provided The engine system includes an engine configured to operate in at least a two-stroke combustion mode and a four-stroke combustion mode, and an exhaust aftertreatment system, EATS configured to reduce emissions from the engine exhausts. The method comprising estimating or predicting the temperature of the EATS; estimating or predicting the emissions out of the EATS; n response of that the temperature of the EATS is below a predetermined temperature threshold, and that the emissions out of the EATS is above a predetermined emission threshold, performing a primary NOx emission reducing activity by operating the engine in a two-stroke combustion mode; subsequently to initiating the operation of the engine in a two-stroke combustion mode, and in response of that the emissions out of the EATS is below the predetermined emission threshold, changing engine operation from the two-stroke combustion mode to a four-stroke combustion mode.

Abstract: A method for preconditioning at least a part of an engine system of a vehicle. The engine system includes an engine and an exhaust aftertreatment system, EATS. The method providing predicted vehicle operational information comprising a vehicle operational initialization time and predicted engine operation, determining whether or not cold-start emissions of the predicted engine operation achieves a threshold criterium, in response to achieving the threshold criterium, preconditioning at least a part of the engine system such that at least said part of the engine system is preconditioned at a time of the vehicle operational initialization time.

Abstract: A method for controlling the operation of an engine system in a vehicle is provided The engine system includes an engine configured to operate in at least a two-stroke combustion mode and a four-stroke combustion mode, and an exhaust aftertreatment system, EATS configured to reduce emissions from the engine exhausts. The method comprising estimating or predicting the temperature of the EATS; estimating or predicting the emissions out of the EATS; n response of that the temperature of the EATS is below a predetermined temperature threshold, and that the emissions out of the EATS is above a predetermined emission threshold, performing a primary NOx emission reducing activity by operating the engine in a two-stroke combustion mode; subsequently to initiating the operation of the engine in a two-stroke combustion mode, and in response of that the emissions out of the EATS is below the predetermined emission threshold, changing engine operation from the two-stroke combustion mode to a four-stroke combustion mode.

Abstract: A method for controlling the operation of an engine system in a vehicle. The engine system including an engine and an exhaust aftertreatment system having an SCR catalyst and a DPF. The method includes determining preview information of the vehicle operation based at least on an upcoming road event and an engine operation associated with the upcoming road event; performing, in response of the preview information, at least one of: controlling the operation of the engine system by increasing reductant injection to meet an ammonia storage threshold level; controlling the operation of the engine system by increasing the engine out NOx to reduce the ammonia storage in the SCR catalyst to meet an ammonia slip threshold level in the SCR catalyst; controlling the operation of the engine system by decreasing the engine out NOx to increase the amount of engine out particles to meet a soot threshold level in the DPF.

Abstract: A method for preconditioning at least a part of an engine system of a vehicle. The engine system includes an engine and an exhaust aftertreatment system, EATS. The method providing predicted vehicle operational information comprising a vehicle operational initialization time and predicted engine operation, determining whether or not cold-start emissions of the predicted engine operation achieves a threshold criterium, in response to achieving the threshold criterium, preconditioning at least a part of the engine system such that at least said part of the engine system is preconditioned at a time of the vehicle operational initialization time.

Abstract: A method for controlling the operation of an engine system in a vehicle. The engine system including an engine and an exhaust aftertreatment system having an SCR catalyst and a DPF. The method includes determining preview information of the vehicle operation based at least on an upcoming road event and an engine operation associated with the upcoming road event; performing, in response of the preview information, at least one of: controlling the operation of the engine system by increasing reductant injection to meet an ammonia storage threshold level; controlling the operation of the engine system by increasing the engine out NOx to reduce the ammonia storage in the SCR catalyst to meet an ammonia slip threshold level in the SCR catalyst; controlling the operation of the engine system by decreasing the engine out NOx to increase the amount of engine out particles to meet a soot threshold level in the DPF.

Abstract: A method for timing of a regeneration process of an exhaust gas system of a vehicle engine includes collecting, during operation of the vehicle, data on an exhaust gas regeneration capability as a function of time, establishing, from the collected data, a statistical probability function for the exhaust gas regeneration capability as a function of time, and identifying, from the probability function, one or several time periods that statistically are suitable and/or unsuitable for carrying out a regeneration process. A method for regeneration of an exhaust gas system of a vehicle engine is also provided.

Abstract: A method is provided for determining a position of at least one actuator of an internal combustion engine arrangement, the method including the steps of: receiving parameter values for engine performance parameters of the internal combustion engine arrangement at a first point in time; predicting at least one engine performance parameter value at an at least one second, future point in time; and determining an actuator position for the at least one actuator by an optimization using the parameter values at the first point in time and at the at least one second point in time as input.

Abstract: A method is provided for determining a position of at least one actuator of an internal combustion engine arrangement, the method including the steps of: receiving parameter values for engine performance parameters of the internal combustion engine arrangement at a first point in time; predicting at least one engine performance parameter value at an at least one second, future point in time; and determining an actuator position for the at least one actuator by an optimization using the parameter values at the first point in time and at the at least one second point in time as input.

Abstract: A system is provided for determining a parameter indicative of an amount of a reducing agent in a selective catalytic reduction (SCR) module of a vehicle, the system including: the SCR module having at least one passage for transporting a stream of gas and an SCR catalyst for converting NOx emissions, and having an extension in an axial direction, at least one first antenna unit configured to transmit and receive a microwave signal. Moreover, the first antenna unit is arranged outside the SCR module and configured to transmit microwave signals towards the SCR catalyst and to receive a microwave signal reflected within the SCR module.

Abstract: A process is provided for regenerating an exhaust gas after-treatment device in an exhaust line of an internal combustion engine arrangement, the exhaust line including a particle filter. The process includes identifying when soot loading of the particle filter exceeds a predetermined level. After that, temperature of exhaust gases at the particle filter is maintained within a first temperature range until at least one of a predetermined period of time has lapsed or a determination is made that soot loading of the particle filter is below the predetermined level. After that, the temperature of the exhaust gases at the particle filter is increased to within a second temperature range above the first temperature range. An internal combustion engine arrangement is also disclosed.

Abstract: A method is provided of operating a diesel engine having an exhaust aftertreatment system (EATS) including one or more apparatus for controlling exhaust NOX levels, the engine including a plurality of systems and components, at least some of which systems and components are adapted to be set to one or more control setpoints for one or more base actuators of the engine. The method includes establishing a plurality of engine operating modes, each operating mode differing from any other operating mode with respect to at least one control setpoint, for each operating mode, mapping fuel economy versus NOX levels exiting the EATS, selecting an operating mode from among the plurality of operating modes so that exhaust exiting the EATS contains NOX at no more than a predetermined NOX level and a least amount of fuel is consumed per unit energy; and operating the engine in the selected operating mode. An engine arrangement is also provided.

Abstract: A system is provided for determining a parameter indicative of an amount of a reducing agent in a selective catalytic reduction (SCR) module of a vehicle, the system including: the SCR module having at least one passage for transporting a stream of gas and an SCR catalyst for converting NOx emissions, and having an extension in an axial direction, at least one first antenna unit configured to transmit and receive a microwave signal. Moreover, the first antenna unit is arranged outside the SCR module and configured to transmit microwave signals towards the SCR catalyst and to receive a microwave signal reflected within the SCR module.

Abstract: A method for timing of a regeneration process of an exhaust gas system of a vehicle engine includes collecting, during operation of the vehicle, data on an exhaust gas regeneration capability as a function of time, establishing, from the collected data, a statistical probability function for the exhaust gas regeneration capability as a function of time, and identifying, from the probability function, one or several time periods that statistically are suitable and/or unsuitable for carrying out a regeneration process. A method for regeneration of an exhaust gas system of a vehicle engine is also provided.

Abstract: A process is provided for regenerating an exhaust gas after-treatment device in an exhaust line of an internal combustion engine arrangement, the exhaust line including a particle filter. The process includes identifying when soot loading of the particle filter exceeds a predetermined level. After that, temperature of exhaust gases at the particle filter is maintained within a first temperature range until at least one of a predetermined period of time has lapsed or a determination is made that soot loading of the particle filter is below the predetermined level. After that, the temperature of the exhaust gases at the particle filter is increased to within a second temperature range above the first temperature range. An internal combustion engine arrangement is also disclosed.

Abstract: A method for controlling a reductant buffer level in an exhaust gas after treatment device connectable downstream of an internal combustion engine includes performing a first reductant injection of a first amount upstream the exhaust gas after treatment device, performing a second reductant injection of a second amount upstream the exhaust gas after treatment device, which second amount is different to the first amount, evaluating the NOx conversion resulting from the first and second reductant injections downstream the exhaust gas after treatment device to obtain a first and second result, controlling a further reductant injection in dependence of the first and second results from the first and second NOx conversion evaluations.

Abstract: A method for controlling a reductant buffer level in an exhaust gas after treatment device connectable downstream of an internal combustion engine includes performing a first reductant injection of a first amount upstream the exhaust gas after treatment device, performing a second reductant injection of a second amount upstream the exhaust gas after treatment device, which second amount is different to the first amount, evaluating the NOx conversion resulting from the first and second reductant injections downstream the exhaust gas after treatment device to obtain a first and second result, controlling a further reductant injection in dependence of the first and second results from the first and second NOx conversion evaluations.

Abstract: A method is provided of operating a diesel engine having an exhaust after treatment system (EATS) including one or more apparatus for controlling exhaust NOX levels, the engine including a plurality of systems and components, at least some of which systems and components are adapted to be set to one or more control setpoints for one or more base actuators of the engine. The method includes establishing a plurality of engine operating modes, each operating mode differing from any other operating mode with respect to at least one control setpoint, for each operating mode, mapping fuel economy versus NOX levels exiting the EATS.

Abstract: A method for an exhaust after treatment system of an engine including at least one selective catalyst reaction (SCR), at least one clean up catalyst downstream from the SCR, a urea injector upstream of the SCR and a first NOx sensor downstream the clean up catalyst. The method includes the steps of injecting a predetermined amount of urea by the injector, providing a second NOx sensor between the SCR and the clean up catalyst, measuring the NOx content received by the first NOx sensor, measuring the NOx content received by the second NOx sensor, comparing the first and the second NOx content with each other, and reducing the predetermined amount of urea if the first NOx sensor measures a higher NOx content than the second NOx sensor.