| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust apparatus of an internal combustion engine capable of preventing the disturbance of exhaust flow in an expansion chamber. SOLUTION: This exhaust apparatus of the internal combustion engine 1 comprises the expansion chamber 8 into which exhaust gases exhausted from cylinders are collected, a plurality of branch pipes 4 to 7 leading the exhaust gases from the exhaust ports of the cylinders into the expansion chamber 8, a catalyst 3 positioned on the exhaust gas downstream side of the expansion chamber 8 and purifying the exhaust gases led through the outlet part 11 of the expansion chamber. The branch pipes 4 to 7 are connected to the expansion chamber 8 so that the exhaust flows flowing from one side opening parts 4a to 7a of the branch pipes 4 to 7 into the expansion chamber 8 are directed in roughly a same direction and are not directed to the outlet part 11 of the expansion chamber. The expansion chamber 8 is formed at a position where the opening center P of the outlet part 11 of the expansion chamber is orthogonal to the direction of a cylinder row and comes out of a plane including a cylinder row center Q. COPYRIGHT: (C)2005,JPO&NCIPI
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