EXHAUST DEVICE OF INTERNAL COMBUSTION ENGINE

PURPOSE:To improve the efficiency of an internal combustion engine by providing an exhaust fan on the way of exhaust system in the engine, thereby sucking the exhaust gas with the exhaust fan, and exhausting it forcedly, resulting in decreasing the flowing resistance of the exhaust gas. CONSTITUTION:An expansion part 2 is formed on the mid-way of a pipe 1 in which an air-motor 4 is provided under covering with a partition wall 3. An air-motor 4 is connected a compressed air supply tubes 5 to supply compressed air from outside of the pipe 1 so as to rotatively drive the air-motor 4, while the compressed air rotatively driven the air-motor 4 is exhausted into the pipe 1 through an air exhaust tube 6. Moreover, the rotary shaft 7 of the air-motor 4 is tightly fitted an exhaust fan 8 so as to exhaust the exhaust gas, that is, by means of rotating the exhaust fan 8 by supplying compressed air to the air-motor 4, thereby rotating the exhaust fan 8, the exhaust gas exhausted from the internal combustion engine is exhausted outside through catalyst 9.