Exhaust-gas purification device for an internal combustion engine or the like

摘要

An exhaust-gas purification device for an internal combustion engine or the like which can effectively purify hydrocarbon (HC) among the toxic components of the exhaust-gas emitted by the engine or the like even when the temperature of said exhaust-gas is relatively low, and an exhaust-gas purification device, wherein, in an exhaust system in which a first purification-treatment section 4 carrying a catalyst 3 is placed in a main exhaust passage 2, a bypass passage 5 is placed which diverges from said main exhaust passage 2 and which later returns to said main exhaust passage 2 at a certain distance, and a second purification treatment section 7 carrying an absorbent 6 is placed in said bypass passage 5.