| 摘要 |
PURPOSE:To make it possible to perform suitable control for respective works by changing control content of clutch-on/off operation, gear change operation, and brake operation according to kinds of work. CONSTITUTION:For example, control content at shift-down operation changes according to kinds of work input to CPU 22 from a control mode switch 26. In the case of draft control at a plow working, normal control of clutch-on is performed after clutch-off and one stage shift down. When the engine load increases over a certain value, shift-up operation is not performed. On the other hand, in the case of plow depth control at a rotary working, brake is actuated at the same time as clutch-off and after one stage shift-down, the clutch is gradually on and the brake is returned to the non-acting side. In this way, as the output from the CPU 22 to solenoid valves V1-V7 is changeovered according to the kinds of working, safe and good working condition can be attained. |
