| 摘要 |
A traveling change speed mechanism is autmatically controlled in response to workload variations in order to maintain the workload within a predetermined range. In normal circumstances controls are effected on the basis of an average value of deviations from a control target value of values of the load sampled a predetermined number of times. A change speed operation is immediately effected in an amount corresponding to the deviations when a difference between the variation sampled values, from values obtained a previous time and from values obtained earlier, is greater than a predetermined amount. |
