Patent ID: 7930877

Claim:
An exhaust system ( 10 ) for an internal combustion engine ( 11 ), which is provided with a intake pipe ( 5 ) of fresh air to an intake manifold ( 3 ) and with a turbocharger ( 16 ) arranged along the intake 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 the emission pipe ( 11 ) and consists of an oxidizing catalyzer ( 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 ) arranged at the confluence with the intake pipe ( 5 ) 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 ); wherein the recirculation circuit ( 26 ) further comprises a filter ( 38 ), which is arranged along the recirculation pipe ( 27 ) near the confluence with the intake pipe ( 5 ) and comprises a metallic mesh ( 39 ); wherein a tube of the recirculation pipe ( 27 ) ends with a connection flange ( 35 ), which is fixed onto the recirculation valve ( 28 ) and supports the filter ( 38 ); and wherein the metallic mesh ( 39 ) of the filter ( 38 ) is integrated in a seal ( 40 ) which is interposed between the connection flange ( 35 ) and the recirculation valve ( 28 ).