Patent ID: 8457849
Filing Date: 2013-06-04
Classification: F16H

Abstract:
1. A method for controlling an automated variable-speed transmission in a drivetrain of an all-wheel drive motor vehicle to prevent automatic shifting of the transmission when the motor vehicle is operating on slippery ground or difficult ground conditions on which there exists a potential for wheel slip, the motor vehicle having a plurality of axles and wheels, which are drivable by an all-wheel drive, and each of the axles having a differential lock, the method comprising the steps of: providing information, which indicates activation of the differential locks, to a transmission control unit; comparing rotational speeds of the wheels to determine wheel slip; and preventing, via the transmission control unit, all automatic shifts of the transmission of the motor vehicle in the event of at least one of the differential locks being active and slipping of at least one of the wheels being detected.