To improve fuel consumption and prevent a deterioration in working efficiency by requiring no complicated control structures by allowing a simple manual operation during work in constant speed travel.
The working vehicle is equipped with an energy-saving mode selecting operation tool 50 for outputting a control signal to an engine rotation speed control device 31 so as to reduce the engine rotation speed by a prescribed amount during working travel at set rotation speed by a rotation speed keeping mechanism for carrying out working travel while keeping engine rotation speed constant, and a speed control means 101 for operating a change gear 4 so as to make the reduction rate of travelling speed less than that of rotation speed based on the detection of operation of the energy-saving mode selecting operation tool 50.
COPYRIGHT: (C)2008,JPO&INPIT
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