Patent ID: 8897976

Claim:
A powertrain having an engine connected to a transmission adapted to drive ground engaging members, comprising: a transmission output speed (TOS) sensor disposed to provide a signal indicative of a speed of an output of the transmission; a controller configured to control operation of the transmission based on a desired torque output of the transmission by, at least in part, estimating an actual torque output of the transmission and using the actual torque estimation as a control feedback; wherein the controller is further configured to: determine, in real time, a first TOS acceleration based on the signal provided by the transmission output speed sensor, determine a second TOS acceleration based on the actual torque estimation that is used as a control feedback; determine a divergence between the first and second TOS accelerations; and activate a torque transient trigger that is used to further control operation of the transmission when the divergence exceeds a threshold value.