Patent ID: 7048672

Claim:
A method for a transmission shift control, the method which comprises: providing an automated twin-clutch transmission including a first transmission unit with a first transmission input shaft, a first engine clutch and a first group of gears and a second transmission unit with a second transmission input shaft, a second engine clutch and a second group of gears; executing a shifting operation between a load gear assigned to the first transmission unit and a target gear assigned to the first transmission unit as a multiple shifting operation by using an intermediate gear assigned to the second transmission unit and by performing a shifting step S 1 including engaging the intermediate gear, performing a shifting step S 2 including a clutch change-over from the first engine clutch assigned to the load gear to the second engine clutch assigned to the intermediate gear, performing a shifting step S 3 including disengaging the load gear, performing a shifting step S 4 including engaging the target gear, and performing a shifting step S 5 including a clutch change-over from the second engine clutch assigned to the intermediate gear to the first engine clutch assigned to the target gear; adjusting an engine speed of an assigned drive engine to reach a synchronous speed of the target gear at an end of the shifting operation; setting, at a start of the shifting operation, an initial target speed gradient according to which the engine speed reaches the synchronous speed at the end of the shifting operation based on an estimated total shifting time; adjusting the engine speed of the drive engine at the start of the shifting operation according to the initial target speed gradient; determining an actual shifting progress during the shifting operation and comparing the actual shifting progress with an estimated shifting progress; and adjusting a target speed gradient to the actual shifting progress in case the actual shifting progress and the estimated shifting progress deviate from one another.