Patent ID: 8489293

Claim:
Method for controlling a powertrain comprising an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and an electric machine adapted to selectively transmit mechanical power to an output member, the method comprising: executing a shift of said transmission from a first operating range state to a second operating range state, comprising: determining an input speed profile to transition an input speed of an input shaft of said transmission from an initial input speed corresponding to said first operating range state to a target input speed corresponding to said second operating range state; determining an input acceleration immediate profile of said input shaft for controlling said electric machine based upon said input speed profile; determining an input acceleration lead immediate profile for said controlling said engine based upon said input acceleration immediate profile and a lead time for said engine; controlling operation of the engine based upon said input acceleration lead immediate profile; and controlling operation of the electric machine based upon the input acceleration immediate profile; wherein said lead time is based upon a difference in a response time for said engine to a response time for said electric machine.