INTERNAL COMBUSTION ENGINE EXHAUST LINE

The invention relates to an exhaust line of an internal combustion engine comprising: a pipe receiving exhaust gases, and a particulate filter impregnated with a first catalytic coating forming a reduction catalyst for nitrogen oxides (NOx), and with a second catalytic coating forming a first oxidation catalyst for carbon monoxide (CO) and hydrocarbons (HC). The line comprises an additional filter housed in the pipe downstream of the particulate filter and impregnated with a catalytic coating forming a second reduction catalyst for nitrogen oxides (NOx). And, the additional filter has an internal structure such that the additional filter creates a pressure drop which is less than the pressure drop created by the same volume of particulate filter impregnated with the same quantity of the same catalytic coating.