METHOD FOR CONTROLLING THE POLLUTANT EMISSIONS OF A COMBUSTION ENGINE

摘要

The invention relates to a method for controlling a system for treating the NOx present in an exhaust line of an internal combustion engine, said system comprising means for introducing a reducing agent into the exhaust line upstream of a NOx reduction catalytic converter, said method involving open-loop control of the injection, estimating the effectiveness of the treatment and comparing this against a maximum conversion potential achieved if the ratio between the amount of reducing agent injected and the amount of NOx in the gases complies with a given set point value and if the mass of reducing agent stored in the catalytic converter complies with a given storage set point value, characterized in that if a fault with treatment is observed and if correction conditions are met, a request to correct the reducing agent storage set point value is initiated.