Patent ID: 6912843

Claim:
An exhaust system for a multi-cylinder internal combustion engine, said exhaust system comprising: a first exhaust-gas line for receiving exhaust gas from a first cylinder group of the internal combustion engine; a second exhaust-gas line for receiving exhaust gas from a second cylinder group of the internal combustion engine; an exhaust-gas expansion chamber; and an exhaust-gas outlet line, leading out of the exhaust-gas expansion chamber, for the discharge of exhaust gas; wherein, the first exhaust-gas line and the second exhaust-gas line are lead into an at least partially perforated exhaust-gas mixing chamber; the exhaust-gas expansion chamber is coupled in gas flow communication with the exhaust-gas mixing chamber via the perforation of the exhaust-gas mixing chamber, so that exhaust gas can expand out of the exhaust-gas mixing chamber into the exhaust-gas expansion chamber; and the first and second exhaust-gas lines and the exhaust-gas mixing chamber collectively comprise a single continuous length of tubing, with the exhaust-gas mixing chamber being formed by an intermediate portion of said tubing which connects said first exhaust-gas line with said second exhaust as line.