Hybrid powertrain with electrically variable transmission having parallel friction launch and method
A hybrid powertrain includes a control unit that regulates electric power interchange an energy storage device and a motor/generator for causing selective torque generation by the motor/generator and for controlling engagement of torque-transmitting mechanisms. The control unit is configured to place the torque-transmitting mechanism in slipping engagement to launch the vehicle and thereby decouple a fixed relationship between engine torque and motor/generator torque or between engine torque and torque at the output member. A method of operating a hybrid vehicle powertrain is also provided.
GM Global Technology Operations, Inc.
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Brendan M. Grantland I. Gregory A. Michael R. Anthony H. Alan G. Larry T. Donald
Conlon Kingman Hubbard Schmidt Heap Holmes Nitz Klemen