Vehicle automatic gear selection impact control system

摘要

The selection impact control system has a range alteration determining unit (70, fig.6), which determines whether a range alteration from a travel range (D) to a neutral range (N) results. A friction element (L/C) is disengaged if this alteration results. A control unit if this change is established, carries out a transition of the hydraulic pressure control such that a hydraulic pressure (PL/C) discharged from the friction element (L/C) is reduced to a pressure level, with which no impact is produced, which previously occurred with such a range alteration. The level of the led off hydraulic pressure (PL/C) is maintained during a time duration (Ts). At the end of which the drive torque in the friction element has faded. So that an engagement torque built up at the friction element is led off at once.