Patent ID: 8725335
Filing Date: 2014-05-13
Classification: B60K,B60L,B60W,Y02T

Abstract:
1. A method for controlling torque in an electronic all wheel drive (eAWD) vehicle, comprising: determining a desired torque command for the eAWD vehicle; processing the desired torque command in one or more chassis systems of the eAWD vehicle to provide chassis data; processing the chassis data and torque capability data for a primary and secondary axle of the eAWD vehicle in a processor to provide a maximum torque limit and a minimum torque limit for the secondary axle; comparing the torque capability data for the secondary axle to the maximum torque limit and the minimum torque limit for the secondary axle to determine whether the propulsion system, the chassis systems or both the propulsion system and the chassis systems have torque priority for the secondary axle; providing, by the propulsion system, an electric motor torque command and an engine torque command when the propulsion system has torque priority for the secondary axle; providing, by the chassis systems, the electric motor torque command and the engine torque command when the chassis systems has torque priority for the secondary axle; processing, when both the propulsion system and the chassis systems have torque priority for the secondary axle, the desired torque command and the maximum and minimum torque limits for the secondary axle in a propulsion system of the eAWD vehicle to provide an electric motor torque command and an engine torque command; and determining total achieved torque and communicating the total achieved torque and the torque capability data for a primary and secondary axle to the processor.