| 摘要 |
<P>PROBLEM TO BE SOLVED: To make a working vehicle run at constant travel speed if an HST pedal takes the same speed change position even if the machine body of the working vehicle differs. <P>SOLUTION: A shift control apparatus of the working vehicle detects the movement of an HST pedal 18 by an HST pedal sensor 58, adjusts the engine speed based on the detected value of the HST pedal sensor 18, and rotates a trunnion shaft of an HST 21 to attain a set travel speed. The apparatus checks a relation between a drive current and output revolution of the HST 21 in an adjustment mode to store it into a control device 50 as control data, changes the drive current by using the control data to attain an output shaft rotation speed set at the detected speed change position of the HST pedal 18, and controls a magnetic valve to rotate the trunnion shaft of the HST 21. <P>COPYRIGHT: (C)2013,JPO&INPIT |
