Abstract: A regeneration control method for a particle filter of an internal combustion engine exhaust line determines operating data items of the particle filter, wherein the data items are at least one representative inside temperature T(t) of the filter at a time t, regenerates the filter by increasing the temperature thereof above a first combustion temperature threshold of a soot contained in the filter, and computes a time-varying parameter dinst(t) representative for the amount of energy produced at the time t by the regeneration process. The method further calculates a weighted parameter Dinst weight(t), which is at least partially defined by the function of dinst(t)*Gtemp (t) or Gtemp (t) and varying in time (t) according to the representative temperature T(t).

Abstract: A regeneration control method for a particle filter of an internal combustion engine exhaust line determines operating data items of the particle filter, wherein the data items are at least one representative inside temperature T(t) of the filter at a time t, regenerates the filter by increasing the temperature thereof above a first combustion temperature threshold of a soot contained in the filter, and computes a time-varying parameter dinst(t) representative for the amount of energy produced at the time t by the regeneration process. The method further calculates a weighted parameter Dinst weight(t), which is at least partially defined by the function of dinst(t)*Gtemp (t) or Gtemp (t) and varying in time (t) according to the representative temperature T(t).

Abstract: The invention concerns a method which consists in arranging a oxygen probe (21) of an exhaust pipe and observing that substantial unique increase of said representative signal towards a threshold value S1 calculated from the start of the bleeding of the nitrogen oxide trap, obtained following a variation subsequent to shift of the engine from lean mixture operating conditions to rich mixture operating conditions, being used as indicator for controlling the end of the bleeding operation. The invention is characterized in that the integration of the signal representing the time between the start of the bleeding and the end of the bleeding, then the comparison of the integration value to a threshold value S2 are used for diagnosing its ageing condition. The invention also concerns a device for implementing said method.

Abstract: A method for regenerating a motor vehicle particle filter that uses a mechanism for regenerating the filter when a load value exceeds a predetermined threshold. Further, a parameter representing operating conditions of the regenerating mechanism is calculated, and the operating conditions of the regenerating mechanism are controlled on the basis of the parameter.

Abstract: The invention concerns a method which consists in arranging a oxygen probe (21) of an exhaust pipe and observing that substantial unique increase of said representative signal towards a threshold value S1 calculated from the start of the bleeding of the nitrogen oxide trap, obtained following a variation subsequent to shift of the engine from lean mixture operating conditions to rich mixture operating conditions, being used as indicator for controlling the end of the bleeding operation. The invention is characterized in that the integration of the signal representing the time between the start of the bleeding and the end of the bleeding, then the comparison of the integration value to a threshold value S2 are used for diagnosing its ageing condition. The invention also concerns a device for implementing said method.

Abstract: A method for regenerating a motor vehicle particle filter that uses a mechanism for regenerating the filter when a load value exceeds a predetermined threshold. Further, a parameter representing operating conditions of the regenerating mechanism is calculated, and the operating conditions of the regenerating mechanism are controlled on the basis of the parameter.

Abstract: A composition for purifying exhaust gases of an internal combustion engine capable of consuming fuel with lean air-fuel ratios includes elements adsorbing the NOx present in the exhaust gases, in the presence of excess oxygen and releasing the adsorbed NOx when the oxygen concentration of the exhaust gases decreases. The NOx adsorbing element includes in combination: a first composition comprising a support and an active phase, the active phase being based on manganese and at least another element A selected among, alkalines and alkaline-earths, the manganese and element A being chemically bound; a second composition including a support and an active phase based on manganese and at least another element B selected among alkalines, alkaline-earths and rare earths, the second composition having or being capable of having a specific surface area of at least 80 m2/g after being calcined at 800° C., and furthermore, a reducing and/or three-way catalyst function is incorporated in the NOx adsorbing element.

Abstract: A device for purification of exhaust gases of an internal combustion engine capable of achieving combustion of a fuel with lean air-fuel ratios. A NOx-adsorbing mechanism is installed in the exhaust line of the engine. That NOx-adsorbing mechanism can absorb the NOx present in the exhaust gases in the presence of excess oxygen and can release the absorbed NOx when the oxygen concentration of the exhaust gases decreases. The NOx-adsorbing mechanism does not contain any composition capable of acting as an NOx reduction catalyst, and especially no precious metal, and further a three-way catalyst is installed in the exhaust line downstream from the NOx-adsorbing mechanism.