EXHAUST GAS TREATMENT SYSTEM COMPRISING A CATALYTIC PARTICULATE FILTER, AND CORRESPONDING METHOD

摘要

The invention relates to an exhaust gas treatment system comprising a catalytic particulate filter, a catalytic reduction device for the reduction of nitrogen oxides, which is mounted downstream of the catalytic particulate filter, an injection device mounted upstream of the catalytic particulate filter, a means for determining the temperature of the catalytic particulate filter and an electronic control unit able to command injection of reducing agent. The electronic control unit comprises a first control means able to command injection of the reducing agent in order to obtain a reference quantity of reducing agent stored in the filter that corresponds to a filter temperature below a threshold, and a second control means able to command the injection of reducing agent in order to obtain a reference quantity of reducing agent stored in the device that corresponds to a filter temperature higher than said threshold.