Patent ID: 8989974
Filing Date: 2015-03-24
Classification: F16H

Abstract:
1. A method of operating a transmission device ( 1 ), of a vehicle drive train, comprising at least one form-fitting shifting element (A, F) and a plurality of frictionally engaged shifting elements (B, C, D, E) which are either connected or disconnected to obtain different transmission ratios (“ 1 ” to “R”), the method comprising the steps of: when a request is made for a gear change from an actual gear ratio to a target gear ratio, disconnecting the form-fitting shifting element (F or A) and connecting at least one of the frictionally engaged shifting elements (B or C) to carry out the requested gear change, and the form-fitting shifting element (F or A) that is to be disengaged, as a result of the requested gear change, being in a disengaged state at a predefined desired moment of disengagement (T determining an actual moment of disengagement (T comparing the actual moment of disengagement (T modifying the desired moment of disengagement (T at least one of shifting the moment at which the form-fitting shifting element (F or A) begins to be actuated by the time value in relation to the desired moment of disengagement (T