Patent ID: 9598081
Date: 2017-03-21
CPC Classifications: B60W,F16D,F16H

Claim:
1. A method of operating a motor vehicle with a dual-clutch transmission ( 3 ) that includes a first partial transmission ( 4 ) with a first transmission input shaft ( 5 ) and a second partial transmission ( 6 ) with a second transmission input shaft ( 7 ), the dual-clutch transmission ( 3 ) further has a first powershiftable friction clutch ( 9 ) associated with the first transmission input shaft ( 5 ) which, in its engaged condition, couples the first transmission input shaft ( 5 ) and the first partial transmission ( 4 ) to a drive input shaft ( 11 ), and a second powershiftable friction clutch ( 10 ) associated with the second transmission input shaft ( 7 ) which, in its engaged condition, couples the second transmission input shaft ( 7 ) and the second partial transmission ( 6 ) to the drive input shaft ( 11 ), and the dual-clutch transmission ( 3 ) also has a transmission output shaft ( 8 ) common to both the first and the second partial transmissions ( 4 , 6 ), and, in defined operating situations of the motor vehicle, a gear for a first travel direction is engaged in the first partial transmission ( 4 ) and, at the same time, a gear for an opposite, second travel direction is engaged in the second partial transmission ( 6 ), the method comprising: when, as the defined operating situation of the motor vehicle, a starting process is called for, and, if a starting speed of the motor vehicle in a desired starting direction is lower than a limit value, keeping engaged the gears for the opposite, second travel direction in the first and the second partial transmissions ( when, as the defined operating situation of the motor vehicle, a starting process is called for, and, if the starting speed of the motor vehicle in the desired starting direction is higher than the limit value, disengaging the gear for the opposite, second travel direction opposite to the desired starting direction in the second partial transmission (