Engine device and stationary work machine having same mounted thereon

A station work machine comprising:

• a work unit comprising a compressor or a power generator;
• an engine;
• a chassis containing the work unit and the engine;
• a cooling fan disposed at one side of the engine;
• a flywheel housing disposed at another side of the engine;
• and
• a flywheel disposed inside the flywheel housing, the flywheel coupled to the work unit and configured to transfer power of the engine to the work unit;
• a ventilation opening disposed at an upper face of the chassis and configured to connect an inside and an outside of the chassis;
• and
• an exhaust-gas purification device configured to purify exhaust gas from the engine,
• wherein the exhaust-gas purification device is:
• disposed at an upper-face side of the flywheel housing such that the exhaust-gas purification device is located above the work unit;
• and
• arranged to face the ventilation opening from below;
• at least one electrical component configured to detect a state of the exhaust-gas purification device;
• a cooling-water circulation mechanism configured to circulate cooling water for cooling the engine, wherein a portion of the cooling water circulated by the cooling-water circulation mechanism cools the at least one electrical component;
• and
• a shutter plate arranged inside the chassis and configured to:
• open the ventilation opening with the weight of the shutter plate when the engine is in a stop state;
• or
• receive wind from the cooling fan and close the ventilation opening when the engine is in a driven state.