| 摘要 |
<p>A power transmission controlling apparatus for controlling a power transmission mechanism provided with a main transmission 2 and an auxiliary transmission 2 to be operated in any one of the changeable high and low speed output states. The auxiliary transmission 20 is operative to perform a changing operation to change one of the high and low speed output states into the other thereof when outputting a drive power and constructed to return its starting position when the changing operation is brought out of an allowable condition preliminarily set based on the operation states of the main transmission 20 in the time period from the time the changing operation starts to the time the changing operation is finished so that the changing operation can be smoothly and stably performed with no unpleasant gear noises.</p> |
