METHOD FOR IMPROVING SHIFT QUALITY DURING GEAR SHIFTING AND GEAR SHIFTING CONTROL

摘要

PCT No. PCT/EP97/06646 Sec. 371 Date Dec. 7, 1998 Sec. 102(e) Date Dec. 7, 1998 PCT Filed Nov. 28, 1997 PCT Pub. No. WO98/25054 PCT Pub. Date Jun. 11, 1998An apparatus for gear shifting control with improved shift quality during gear shifting includes a gearbox unit containing at least one gear branch for power transfer via a hydrodynamic clutch. The hydrodynamic clutch can be coupled in series with a mechanical gearing part containing a device for realizing at least two speeds. In the course of power transfer via the hydrodynamic clutch during a gear shift operation between two mechanical speeds, the fill factor of the hydrodynamic clutch is so altered that a variable which at least indirectly characterizes the rotational speed of the primary bucket wheel of the hydrodynamic clutch is held substantially constant over a certain range of the gear shift operation.