| 摘要 |
<p>PURPOSE:To prevent generation of transmission shock in the case that an artificial operation means is operated from advancing or retreating position to a neutral position, and then returned to the original position for operation, by measuring the operation period at the neutral position and changing the supplying amount of pressure oil according thereto. CONSTITUTION:In a controller 21, solenoid proportional pressure reducing valves V1, V2 are controlled and hydraulic clutches C1, C2 are connected and discon nected by means of changeover operation of switch SW as an artificial opera tional means. When the switch SW is operated from an advancing or a retreating position to a neutral position, and returned to the original position for operation, the period of operation at the neutral position is measured by a measuring means 22. In case that the measured operation period is shorter than a specified period, an oil amount setting change means 23 changes the supplying amount of pressure oil at the initial open/close operation of the sole noid proportional pressure reducing valve V1 or V2 to be less amount than a reference one after passing of the operation period. Generation of transmission shock is thus prevented.</p> |
