| 摘要 |
<p>PCT No. PCT/EP96/05426 Sec. 371 Date May 22, 1998 Sec. 102(e) Date May 22, 1998 PCT Filed Dec. 5, 1996 PCT Pub. No. WO97/21942 PCT Pub. Date Jun. 19, 1997The invention relates to a gear control system for a synchro-shuttle gear (1) or powershift gear (2) in particular in machines, comprising switching elements for a forward drive (SEV1, SEV2) or reverse drive (SER) and switching devices for actuating a shift valve (SV1) to select the direction of travel. A control valve (SV2) is provided between the switching elements for forward drive and reverse drive and the shift valve capable of being actuated by the switching devices to select the direction of travel, said control valve (SV2) can be actuated via a further switching device. The control valve can be used as a neutral-position or idling valve in a synchro-shuttle gear or as a reversing valve for the switching elements for forward drive in a powershift gear.</p> |
