Method for controlling pollutant emissions from a combustion engine
AssigneePeugeot Citroen Automobiles SA
InventorsChristophe Charial, Clement Grise
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for controlling a system for treating NOx in an exhaust line of an internal combustion engine, said system comprising means for introducing a reducing agent into the exhaust line upstream of an NOx reduction catalyst. The invention is characterised in that it consists in estimating the efficiency of the treatment in relation to a maximum conversion potential obtained if the ratio between the quantity of injected reducer and the quantity of NOx in the gas complies with a given set value and if the mass of reducing agent stored in the catalyst complies with a given storage set value.
Claims11
A method for controlling the treatment of NOx present in the exhaust line of an internal combustion engine, said system comprising means for introducing a reducing agent in the exhaust line upstream of the NOx reduction catalyst, wherein a treatment efficiency is estimated relative to a maximum conversion potential obtained if the ratio between the quantity of injected reducer and the NOx quantity in the gas complies with a given set point and if the mass of reducing agent stored in the reduction catalyst complies with a given storage set point.
Dependencies are inferred from the claim text.