| 摘要 |
<p>To smoothly execute a clutch operation by reducing a shock caused by a pressure variation when a clutch is released and engaged and preventing a damage of a hydraulic circuit and the like while keeping low fuel consumption, in a one-pump/two-motors HST, a control apparatus of a working vehicle, in which a clutch is released or engaged so that power is transmitted to an output shaft of an HST motor 10a via a clutch 13 and the working vehicle travels by powers of the HST motors 10a and 10b, includes an HST controller 31 for determining a working vehicle load of the working vehicle from a throttle output amount and an engine speed of an engine 1, executing control for reducing a pump injection amount of an HST pump 4 under a restriction of an upper limit injection amount of the HST pump 4 predetermined based on the working vehicle load at the time of release shift control of the clutch 13, and executing control for increasing an pump injection amount of the HST pump 4 under a restriction of a lower limit injection amount of the HST pump 4 predetermined based on the working vehicle load at the time of engagement shift control of the clutch 13.</p> |
