| 摘要 |
PROBLEM TO BE SOLVED: To allow a change in running speed by changing gears or the like to be smoothly performed when an engine rotation number is set at a high-speed rotation and the running speed to be safely increased without a rapid speed increase when the engine rotation number is switched from a low-speed rotation to a high-speed rotation during running in a work vehicle including a means for setting the engine rotation number in a plurality of stages by the running device of a tractor, a transporting work vehicle or the like. SOLUTION: A device for controlling the rotation of the work vehicle engine comprises engine rotation number set means A for setting the engine rotation number in a plurality of stages from a low speed to a high speed, and a transmission shift means B for shifting an engine output rotation in a plurality of stages from a low speed to a high speed, wherein a rotation increment rate control is provided which makes a rotation increment rate when the engine rotation number set means A is switched from a low speed to a high speed during a transmission shift in a high-speed stages smaller than a rotation increment rate when the engine rotation number set means A is similarly switched during a transmission shift in a low-speed step. COPYRIGHT: (C)2008,JPO&INPIT
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