Patent ID: 9623748
Date: 2017-04-18
CPC Classifications: B60K,B60W,F16D

Claim:
1. A method for operating a drive train of a motor vehicle, comprising the steps of: detecting at least one variable quantifying or influencing a movement of the motor vehicle; estimating based on the at least one variable whether or not a relevant driving situation is imminent, wherein a relevant driving situation is to be understood as a driving situation where a deviation between an actual driving behavior of the motor vehicle and a driving behavior predetermined by a driver can be expected, or as every situation where a different driving behavior between single-axle operation and all-wheel drive operation discernible by the driver exists; detecting with environmental sensors of the motor vehicle or with a navigation device of the motor vehicle a roadway section located in the direction of travel in front of the motor vehicle; checking whether the roadway section has a curve with a radius of curvature that is smaller than a predetermined radius of curvature, and switching on an all-wheel drive of the motor vehicle as a function of the at least one variable prior to an occurrence of the relevant driving situation and before passing the roadway section.