EXHAUST MUFFLER

PROBLEM TO BE SOLVED: To solve a problem that since a conventional muffler is not easy to clean a catalyst by being disassembled, many catalyst elements have to be housed in order to extend the service life (the period when cleanliness of the exhaust gas emitted from the exhaust muffler and exhaust efficiency are being maintained) of the exhaust muffler, and many expensive catalysts are required and the manufacturing cost is high to prevent the exhaust efficiency from lowering even when slight clogging occurs. SOLUTION: The exhaust muffler 1 which is connected to the downstream side of the exhaust manifold of the engine, and houses the catalyst elements 20, is constituted so that the catalyst elements 20 can be attached to/detached from an exhaust port 5a side. COPYRIGHT: (C)2004,JPO