Patent ID: 8298116
Filing Date: 2012-10-30
Classification: B60K,B60L,B60W,F16H,Y02T,Y10T

Abstract:
1. Method for operating a powertrain including an electro-mechanical transmission mechanically-operatively coupled to an input member of an internal combustion engine and a pair of electric machines for mechanical power flow to an output member through selective actuation of a plurality of torque-transfer clutches, said electric machines electrically-operatively coupled to an energy storage system for electric power flow therebetween, the method comprising: commanding operation of the electro-mechanical transmission in a continuously variable operating range state; monitoring operation of the transmission; affirmatively determining absence of a mode-gear mismatch between the commanded continuously variable operating range state and an actual operating state of the transmission by monitoring clutch slippage; detecting presence of a mode-gear mismatch between the commanded continuously variable operating range state and the actual operating state of the transmission; and, modifying operation of the powertrain upon detecting the presence of a mode-gear mismatch between the commanded continuously variable operating range state and the actual operating state of the transmission.