Exhaust system for an internal combustion engine provided with an exhaust gas recirculation circuit

1) An exhaust system (10) for an internal combustion engine (11), which is provided with a feeding pipe (5) of fresh air to an intake manifold (3) and with a turbocharger (16) arranged along the feeding pipe (5) the exhaust system (10) comprises:

• an emission pipe (11) for releasing the exhaust gases produced by the internal combustion engine (1) into the atmosphere;
• at least one gas treatment device (12), which is arranged along emission pipe (11) and consists of an oxidising catalyser (13) and an anti-particulate filter (14);
• and
• a recirculation circuit (26), which comprises a recirculation pipe (27) which is regulated by a recirculation valve (28) and connects the emission pipe (11) downstream of the treatment device (12) to the intake pipe (5) upstream of a compressor (18) of the turbocharger (16) to introduce into the intake pipe (5) a certain amount of exhaust gases present in the emission pipe (11);
• the muffler (1) is characterised in that the recirculation circuit (26) comprises a filter (38), which is arranged along the recirculation pipe (27) and comprises a metallic mesh (39) arranged to close the recirculation pipe (27).