Patent ID: 8465394
Filing Date: 2013-06-18
Classification: B60W,F16H,Y10T

Abstract:
1. A method of operating a transmission device ( 10 ) of a vehicle drive-train ( 1 ) that comprises a plurality of frictional shifting elements (A, C to E) and at least one interlocking shifting element (B) for obtaining various gear ratios (“1” to “R”), wherein in a neutral operating condition (“N”) of the transmission device ( 10 ), in which a force flow is interrupted in an area of the transmission device ( 10 ), and in a case of an operating condition variation of the vehicle drive-train ( 1 ) in which, when required to establish the force flow in the transmission device ( 10 ), the at least one interlocking shifting element (B) has to be changed from a disengaged to an engaged operating condition, the method comprising the steps of: increasing transmission capacities of at least two frictional shifting elements (A, C), which have to be engaged to produce the force flow, to a level at which the frictional shifting elements (A, C) operate in a slip-free condition, determining a rotational speed difference (nd_B) in an area of the interlocking shifting element (B), and adjusting a drive torque (m_mot) of a drive machine (