| 摘要 |
PROBLEM TO BE SOLVED: To prevent an engine-cooling air in a hot air state from hitting an operator under operation of manual threshing in a combine harvester discharging the engine-cooling air caused by a cooling fan to a threshing part side. SOLUTION: The combine harvester 1 discharging the engine-cooling air caused by the cooling fan 8 to a threshing part 3 side judges the manual threshing operation state of the combine harvester 1, and when judged as the manual threshing operation state, the discharge of the engine-cooling air to the threshing part 3 is restricted. Concretely, when a manual threshing switch 42 installed in the threshing part 3 is operated, or an implement clutch for putting on or off a threshing power is in the on-state, and further the height of a pretreatment part 2 for reaping grain culms is not higher than a set height, and the traveling speed of a traveling machine body is lower than a set speed, the operation is judged to be in the manual threshing operation state, and the discharged air is restricted by stopping the cooling fan 8 or reversely driving an electrically driven fan 12. COPYRIGHT: (C)2007,JPO&INPIT
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