Abstract: A method for treating exhaust gas emitted by an internal combustion engine (ICE) in a hybrid architected motor vehicle with an electric motor. The method includes disposing a heater in the exhaust, disposing a first Lean NOx Trap (LNT) downstream of the heater, disposing a second LNT downstream of the first LNT, disposing a passive selective catalytic reduction (SCR) downstream of the second LNT, disposing a hydrocarbon oxidation catalyst downstream of the SCR. The method also includes connecting a controller to the heater, the controller executes a method of controlling the NOx emissions of the ICE, the method includes monitoring a torque demand for the vehicle, determining if the torque demand is large enough to cause the ICE to generate excessive NOx, operating the ICE at a torque less than the torque demand, and operating the motor with the ICE to provide sufficient torque to satisfy the torque demand.

Abstract: A method for treating exhaust gas emitted by an internal combustion engine (ICE) in a hybrid architected motor vehicle with an electric motor. The method includes disposing a heater in the exhaust, disposing a first Lean NOx Trap (LNT) downstream of the heater, disposing a second LNT downstream of the first LNT, disposing a passive selective catalytic reduction (SCR) downstream of the second LNT, disposing a hydrocarbon oxidation catalyst downstream of the SCR. The method also includes connecting a controller to the heater, the controller executes a method of controlling the NOx emissions of the ICE, the method includes monitoring a torque demand for the vehicle, determining if the torque demand is large enough to cause the ICE to generate excessive NOx, operating the ICE at a torque less than the torque demand, and operating the motor with the ICE to provide sufficient torque to satisfy the torque demand.

Abstract: There is described a method of controlling air intake flow of an internal combustion engine (1), the method including the steps of calculating a reference airflow (AREF) as the sum of a feed-forward contribution (AFF), calculated as a function of the reference air/fuel ratio ((A/F)REF) to be obtained in the combustion chamber, and a feed-back contribution (AFB), calculated as a function of the oxygen concentration (% O2) of the exhaust gas; and closed-loop controlling the air intake flow of the engine so that it equals the reference airflow (AREF).

Abstract: Described herein is a method for managing regeneration of a diesel-particulate filter for a gas-exhaust system of the internal-combustion engine of a vehicle, comprising a first step of regeneration of the diesel-particulate filter during which the diesel-particulate filter is regenerated at a first regeneration rate, and a second step of regeneration of the diesel-particulate filter, during which the diesel-particulate filter is regenerated at a second regeneration rate higher than the first regeneration rate.

Abstract: A method of activating regeneration of a nitric oxide adsorber (8) for treating exhaust gas produced by an internal combustion engine (1) of a vehicle, the method including the steps of determining the fill level (FILL) of the nitric oxide adsorber (8); monitoring the running conditions of the vehicle and/or the operating conditions of the engine (1); and activating regeneration of the nitric oxide adsorber (8) when the fill level (FILL) of the nitric oxide adsorber (8) exceeds a maximum fill level (FILLMAX), and the running conditions of the vehicle and/or the operating conditions of the engine (1) are favourable to regeneration.

Abstract: Described herein is a method for managing regeneration of a diesel-particulate filter for a gas-exhaust system of the internal-combustion engine of a vehicle, comprising a first step of regeneration of the diesel-particulate filter during which the diesel-particulate filter is regenerated at a first regeneration rate, and a second step of regeneration of the diesel-particulate filter, during which the diesel-particulate filter is regenerated at a second regeneration rate higher than the first regeneration rate.

Abstract: There is described a method of controlling air intake flow of an internal combustion engine (1), the method including the steps of calculating a reference airflow (AREF) as the sum of a feed-forward contribution (AFF), calculated as a function of the reference air/fuel ratio ((A/F)REF) to be obtained in the combustion chamber, and a feed-back contribution (AFB), calculated as a function of the oxygen concentration (% O2) of the exhaust gas; and closed-loop controlling the air intake flow of the engine so that it equals the reference airflow (AREF).

Abstract: A method of activating regeneration of a nitric oxide adsorber (8) for treating exhaust gas produced by an internal combustion engine (1) of a vehicle, the method including the steps of determining the fill level (FILL) of the nitric oxide adsorber (8); monitoring the running conditions of the vehicle and/or the operating conditions of the engine (1); and activating regeneration of the nitric oxide adsorber (8) when the fill level (FILL) of the nitric oxide adsorber (8) exceeds a maximum fill level (FILLMAX), and the running conditions of the vehicle and/or the operating conditions of the engine (1) are favourable to regeneration.