| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an engine working machine that enhances soundproof effect while sufficiently securing ventilation cross sectional area of a duct. <P>SOLUTION: An air intake duct 17 for sucking the outdoor air and an air discharge duct 18 for discharging the exhaust air in a casing are provided in the casing of the engine working machine 11. Sound-absorption materials 19, 20 for absorbing the noise are filled in bent parts 17d, 17e, 18a, 18c provided in the air intake duct 17 and the air discharge duct 18. Duct inner surfaces of the sound-absorption materials 19, 20 serve as guide surfaces 19a, 20a which guide the outdoor air or the discharge air flowing in the ducts from the upstream side to the downstream side of the bent parts. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
