| 摘要 |
PURPOSE: A vehicle speed control structure of a work vehicle, an information display structure of a work vehicle, and a transmission structure of a work vehicle are provided to restrain the engine stole caused by overload, to improve precision at work by replenishing a change in power transfer efficiency of a continuous variable transmission, to indicate the continuous variation of a transmission ratio of a continuous variable transmission and the information suitable for a work vehicle, and to utilize a variable capacity motor more effectively without lowering of operation. CONSTITUTION: A vehicle speed control structure of a work vehicle includes an engine rotational frequency detection unit detecting the rotational frequency of an engine, a transmission gear ratio setting unit setting the transmission gear ratio of a continuous variable transmission(9), a vehicle speed detection unit detecting the vehicle speed, a transmission gear radio changeover unit changing the transmission ratio of the continuous variable transmission, and a vehicle speed control unit getting the target vehicle speed of control on the basis of the output of the engine rotational frequency detection unit and the output of the transmission ratio setting unit and controlling the operation of the transmission ratio changeover unit to make the output of the vehicle speed detection unit coincide with the target vehicle speed of control. |
