| 摘要 |
The purpose of the present invention is to provide an exhaust gas purification device (27) provided in an exhaust path (25) of an engine (12), wherein the pipe length of a by-pass path (29) that bypasses purification catalysts (62, 63) is made as short as possible so that initial costs are reduced. This exhaust gas purification device (27) is provided with a purification casing (61) that houses at least the purification catalysts (62, 63) that purify exhaust gas from the engine (12). The by-pass path (29) that causes the exhaust gas to make a circuit without passing through the purification catalysts (62, 63) is integrally provided to the purification casing (61) separately from a purification path (28) that includes the purification catalysts (62, 63). |
