摘要:
The invention concerns a composition for purifying exhaust gases of an internal engine capable of consuming fuel with lean air-fuel ratios, comprising means adsorbing NOx present in the exhaust gases, in the presence of excess oxygen and which release the adsorbed NOx when the oxygen concentration of the exhaust gases decreases. The invention is characterised in that the NOx adsorbing means comprise at least a support and at least an active phase based on manganese and that furthermore, a reducing and/or a three-way catalyst function is incorporated in the NOx adsorbing composition.
摘要:
The invention concerns a composition for purifying exhaust gases of an internal combustion engine capable of consuming fuel with lean air-fuel ratios comprising means 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 invention is characterised in that the NOx adsorbing means comprise in combination: a first composition comprising a support and an active phase, the active base 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 comprising a support and an active phase based on manganese and at least another element B selected among alkalines, alkaline-earths and rare earths, said second composition having or being capable of having a specific surface area of at least 80 m /g after being calcined at 800 DEG C, and furthermore, a reducing and/or three-way catalyst function is incorporated in the NOx adsorbing means.
摘要:
The invention concerns a composition for purifying exhaust gases of an internal combustion engine capable of consuming fuel with lean air-fuel ratios comprising means 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 invention is characterised in that the NOx adsorbing means comprise in combination: a first composition comprising a support and an active phase, the active base 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 comprising a support and an active phase based on manganese and at least another element B selected among alkalines, alkaline-earths and rare earths, said 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 NO¿x? adsorbing means.
摘要:
The invention concerns a device for purifying an internal combustion engine exhaust gases comprising an internal combustion engine capable of consuming fuel with lean air-fuel mixture ratios, means for adsorbing NOx arranged in the engine exhaust line, said means being of the type which adsorb the NOx present in the exhaust gases in the presence of excess oxygen and which release the adsorbed NOx when the oxygen concentration of the exhaust gases decreases. The invention is characterised in that the NOx adsorbing means do not contain any composition capable of acting as NOx reducing catalyst and in particular no precious metal and a three-way catalyst is installed in the exhaust line downstream of the NOx adsorbing means.
摘要:
The invention concerns a device for purifying an internal combustion engine exhaust gases comprising an internal combustion engine capable of consuming fuel with lean air-fuel mixture ratios, means for adsorbing NOx arranged in the engine exhaust line, said means being of the type which adsorb the NOx present in the exhaust gases in the presence of excess oxygen and which release the adsorbed NOx when the oxygen concentration of the exhaust gases decreases. The invention is characterised in that the NOx adsorbing means do not contain any composition capable of acting as NOx reducing catalyst and in particular no precious metal and a three-way catalyst is installed in the exhaust line downstream of the NOx adsorbing means.
摘要:
The invention concerns a composition for purifying exhaust gases of an internal engine capable of consuming fuel with lean air-fuel ratios, comprising means adsorbing NOx present in the exhaust gases, in the presence of excess oxygen and which release the adsorbed NOx when the oxygen concentration of the exhaust gases decreases. The invention is characterised in that the NOx adsorbing means comprise at least a support and at least an active phase based on manganese and that furthermore, a reducing and/or a three-way catalyst function is incorporated in the NOx adsorbing composition.
摘要:
The invention concerns a compound and its use as NOx trap in the treatment of exhaust gases. Said compound is characterised in that it comprises a combination of: 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 the alkalines and alkaline earths, the manganese and the element A being chemically bound, a second composition comprising a support and an active phase based on manganese and at least another element B selected among the alkalines, the alkaline-earths and rare earths, said second composition having or capable of having a specific surface area of at least 10 m2/g after being calcined for 8 hours at 800 °C.
摘要:
A regeneration control method for a particle filter of an internal combustion engine exhaust line consists in determining operating data items of the particle filter, wherein said data items are at least one representative inside temperature T(t) of the filter at a time t, in regenerating the filter by increasing the temperature thereof above a first combustion temperature threshold of a soot contained in the filter, in computing a time-varying parameter dinst(t) representative for the amount of energy produced at the time t by the regeneration process. The inventive regeneration control method also consists in calculating 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 said representative temperature T(t).
摘要:
The invention concerns a method for regenerating a motor vehicle particle filter (26) which consists in using means for regenerating the filter when the load value exceeds a predetermined threshold. It further consists in calculating a parameter representing operating conditions of the regenerating means and in controlling the operating conditions of the regenerating means on the basis of said parameter.
摘要:
The invention concerns a method for regenerating a motor vehicle particle filter (26) which consists in using means for regenerating the filter when the load value exceeds a predetermined threshold. It further consists in calculating a parameter representing operating conditions of the regenerating means and in controlling the operating conditions of the regenerating means on the basis of said parameter.