Patent ID: 8170764

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 of said transmission, said method comprising: monitoring an input speed of an input member of said transmission; monitoring an output speed of said output member; upon initiation of a transmission shift, determining a plurality of input acceleration profiles for controlling said engine and electric machine during said shift, comprising: determining a target input speed synchronizing said input member based upon a destination gear state; and determining said input acceleration profiles based upon transitioning said input speed from an initial input speed to said target input speed; identifying an input acceleration constraint affecting one of said input acceleration profiles; reprofiling said input acceleration profiles based upon said identified input acceleration constraint, comprising: determining a new target input speed based upon said input acceleration constraint; and reprofiling said input acceleration profiles based upon said new target input speed; and controlling operation of said engine and electric machine based upon said reprofiled input acceleration profiles.