PROBLEM TO BE SOLVED: To reduce the noise and fuel consumption in farm work.SOLUTION: The combine 1 operates at least a traveling part 7 and a threshing part 3 by the power of an engine E and is provided with an engine revolution controlling means 32 to control the revolution speed of the engine E, a stepless speed change device 25 for threshing to continuously change the engine power transmitting to the threshing part 3, and a controller 33 to electrically control the engine revolution controlling means 32 and the stepless speed change device 25 for threshing. The controller 33 controls the stepless speed change device 25 for threshing to increase or decrease the revolution speed of the engine according to the increase or decrease of the traveling speed and keep the revolution speed of the threshing part independent of the variation of the revolution speed of the engine.COPYRIGHT: (C)2010,JPO&INPIT【課題】作業中における騒音及び燃料の削減を図る。【解決手段】少なくとも走行部7及び脱穀部3をエンジンEの動力で動作させるコンバイン1であって、エンジンEの回転数を調整するエンジン回転調整手段32と、脱穀部3に伝動するエンジン動力を無段階に変速する脱穀用無段変速装置25と、エンジン回転調整手段32及び脱穀用無段変速装置25を電気的に制御する制御装置33とを備え、該制御装置33は、作業中であっても、車速の増減に応じてエンジン回転数を増減させると共に、エンジン回転数の増減に拘わらず脱穀部回転数が一定となるように脱穀用無段変速装置25を制御する。【選択図】図5
