Patent ID: 7846065

Claim:
A powertrain system for a vehicle, the powertrain system comprising: an engine having an output; a transmission selectively driven by said output of said engine; a torque converter disposed between said engine and said transmission for selectively coupling said output of said engine to said transmission; a valve in fluid communication with said torque converter and operable to control a fluid flow to adjust a pressure within said torque converter; and a control system in communication with said valve, said engine and said torque converter, said control system including a feed-forward module and a feedback module, said feed-forward module being operable to anticipate a first volume of fluid necessary to have a desired effect on said pressure based on an input parameter supplied to said engine and provide a first signal to said valve indicative of said first volume, said feedback module generating and providing a second signal to said feed-forward module to adjust a slip speed of said torque converter.