Patent ID: 9079577
Filing Date: 2015-07-14
Classification: B60K,B60W

Abstract:
1. A method for operating a transmission system of an automotive vehicle, the transmission system including a coupler that mechanically couples first and second axles of the transmission system, a state of the coupler defining a plurality of transmission modes, the method comprising: determining whether a vehicle speed of the automotive vehicle exceeds a speed threshold for a determined duration; switching the transmission system from a first mode, in which the torque transmissible by the coupler is fixed, to a different transmission mode when the vehicle speed exceeds the speed threshold for the determined duration; determining whether a temperature of the coupler exceeds a predetermined temperature; determining whether a vehicle fault state exceeds a predetermined fault level; and switching the transmission system from the different transmission mode to the first mode after receiving an instruction to operate the transmission system in the first mode when