联合收割机作业时,不论作物生长情况怎样,作业速度快慢,割幅宽窄,都必须用大油门。不能因为作物过稀,作业速度较慢,割幅又窄,发动机负荷较轻而用中、小油门作业。这是因为联合收割机上所有工作部件的最佳运动参数,都是在发动机额定转速下设计的。当改变发动机转速时,就改变了工作 Combine harvester operation, regardless of crop growth situation, operating speed, cutting width, must use a large throttle. Can not because crops are too thin, slow operating speed, cutting width and narrow, light engine load with medium and small throttle operation. This is because the optimal kinematic parameters of all the working parts on the combine harvester are designed at the rated engine speed. When changing the engine speed, it changed the job