| 摘要 |
Exhaust system for reducing pollutants in the exhaust gases of an internal-combustion engine, which comprises: at least one relatively long combustion chamber (2); a burner (3) located at the head of the, or of each, combustion chamber (2) and suitable to produce and maintain a pressurized flame that produces a relatively high temperature along the, or the respective, combustion chamber (2); an expansion and flow reversal chamber (4) located downstream of the, or of the respective, combustion chamber (2) and connected to the exhaust unit (188) of the internal-combustion engine; at least one duct (6) for conveying the exhaust gases to be purified which is arranged so as to exchange heat and extends along and around both the expansion chamber (4) and the combustion chamber (2) starting from a manifold (5) up to at least one first lateral outlet port (7) at the combustion chamber so that the exhaust gases undergo superheating and a reheating process; at least one thermally insulating casing (12) around both the, or each, conveyance duct (6) and around the, or the respective, combustion chamber (2) to delimit, together with said chamber (2), at least one interspace (10) through which the combustion gases from the expansion and reversal chamber (4) flow out in the reverse direction before reaching a second outlet port (11); and at least one cooling unit (12, 13) at the exit of each outlet port (7, 11). |
