| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a smooth clutch action by making a mechanical shock through a pressure fluctuation on releasing the clutch or engaging the clutch less to prevent damage on a hydraulic circuit or like while keeping a low fuel efficiency. <P>SOLUTION: The device for controlling the working vehicle includes a 1-pump 2-motor-style HST, wherein power is transmitted to an output shaft of an HST motor 10a via the clutch 13 or release or engagement of a clutch to run the vehicle with power of the HST motors 10a and 10b. A load of the vehicle is obtained through a throttle output flow rate and an engine speed of the engine. Further the device includes an HST controller 31 for controlling the following: when a control for a shift of the clutch 13 to releasing the same under the upper-limit discharge of an HST pump 4, previously obtained from the vehicle load, the control renders the pump discharge of the HST pump 4 less; when a control for a shift of the clutch 13 to release the same under the lower-limit discharge of the HST pump 4, previously obtained from the vehicle load, the control renders the pump discharge of the HST pump 4 much. <P>COPYRIGHT: (C)2013,JPO&INPIT |
