EXHAUST EMISSION CONTROL SYSTEM

摘要

PROBLEM TO BE SOLVED: To reduce discharged amount of product in exhaust gas by removing product in exhaust gas without increasing cost. SOLUTION: This system is characterized by providing first/second muffler passages with each end side communicated with an exhaust inflow part within a muffler interposed at the midway of an exhaust pipe of an engine, first/second expanded chambers and a flow rate regulating part, providing the first expanded chamber with a pellet- shaped ceramic filter, providing the first expanded chamber to be communicated with a downstream side exhaust passage, providing a purification exhaust passage with one end side communicated with the second expanded chamber and with the other end side communicated with a downstream side exhaust passage, providing the purification exhaust passage with a purification means and a recovery means, providing the purification means so as to section a plurality of chambers by a porous ceramic filter, providing an injection part within at least one of the chambers, providing the recovery means with a fluid reservoir means, a force feed pump for forcibly feeding fluid to the injection part and a fluid circulation passage, providing the circulation passage with a strainer with a paper filter and a circulation pump and providing a control means to control the operation of the injection part so as to increase/decrease fluid amount injected into the chambers according to the operation state of the engine.