| 摘要 |
PROBLEM TO BE SOLVED: To obtain an appropriate selection performance by detecting the threshed amount of treated materials in a swinging selection device irrespective to the presence or absence and the large or small value of the reaped amount of culms. SOLUTION: This cereal grain selection-controlling device in a combine, is to calculate a ratio of a secondary reduction flow rate N2 to a measured first cereal grain flow rate N1, (N2/N1)=Mko (called as a measured value) (S2), and meanwhile, when the measured first grain flow rate N1 is larger than a prescribed set value SP1 at a time of a normal reaping work (S4: yes), an opening and closing control of a chaff is performed so as to maintain the ratio of the secondary reduction flow rate N2 to the measured first grain flow rate N1, (N2/N1)=Mko at the set objective value Mk (S5-S8). When the first cereal grain flow rate N1 is smaller than the prescribed set value SP1 at the time of the normal reaping work (S4: no), the opening and closing control of the chaff is not performed.
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