| 摘要 |
<p>A power transmission comprises a forward power transfer pass, a reverse power transfer pass, a hydraulic forward clutch 30, and a hydraulic reverse brake 25. The forward power transfer pass, which is selectively established by the forward clutch 30, transmits the rotational driving force of an engine as forward drive rotation, and the reverse power transfer pass, which is established by the reverse brake 25, transmits the rotational driving force of the engine as reverse drive rotation. While the forward clutch 30 is not engaged, so the forward power transfer pass is discharged, an engine-output controller 50 operates to restrict the rotational speed of the engine below a predetermined rotational speed. <IMAGE></p> |
