Patent ID: 9086146
Filing Date: 2015-07-21
Classification: F16H

Abstract:
1. A method of operating a transmission device of a vehicle drive-train which comprises a plurality of frictional shifting and at least one interlocking shifting element, having first and second mating halves, which are either engaged or disengaged to obtain various gears, the method comprising the steps of: initiating a required gearshift from a current gear in which the interlocking shifting element is disengaged, to a target gear, in which the interlocking shifting element is engaged; determining, before the required gearshift is completed, if it is necessary to re-engage the current gear in the transmission; determining a current operating condition of the interlocking shifting element based on an axial relationship of the first and the second mating halves of the interlocking shifting element with respect to one another; terminating the required gearshift and re-engaging the current gear if both: while completing the required gearshift if both: