| 摘要 |
<p>A control device for the automatic shifting of staged gear-boxes comprises an electronic control unit and determined, as a function of the speed and the load, the gearshifting points with a selective switch of the stop position or the neutral both in forward and reverse motion. The series of forward gears further comprises positions which enable to exclude one or a plurality of speeds from the automatic shifting. Various shifting modes (F1 to F8), corresponding to different possible driving states are stored, and amongst them one mode (F1 to F8) is selected in relation to the detected real driving state and engaged according to its gearshifting sequence. The driving state is preferably detected on the base of the acceleration change calculated from the speed of the secondary shaft, and the shifting modes are gearshifting sequences selected among the possible gears of the staged gear-box.</p> |
