| 摘要 |
<p>PROBLEM TO BE SOLVED: To reflect an operator's intention in the control by conducting the car speed control according to the newly caused change to various working environmental conditions and giving priority to manual operation of a car speed designating device when the operating position of the car speed designating device and the operating position of a continuously variable transmission mechanism substantially agree. SOLUTION: When a control on-off switch 25 for reading a setting signal of each lever or switch and a detection signal of every kind of sensor is 'on', the car speed control is executed. During the car speed control, the operating position L of a gear shift lever 21 is compared with the turning angleθof a trunnion shaft of HST12 to judge whether or not the operating position L substantially agrees with the operating position LS corresponding to the turning angleθS of the trunnion shaft during deceleration control. If yes, the present car speed control mode is released, and the priority is given to the manual operation of the gear shift lever 21. That is, the deceleration target valueθS of HST 12 is set to the turning angleθN of the trunnion shaft corresponding to the operating position LN of the present gear shift lever to conduct the control.</p> |
