Patent ID: 7524263

Claim:
A powertrain comprising: an engine configured to produce rotary power and having an engine output member characterized by a selectively variable rotational speed; a motor configured to produce rotary power and having a rotor characterized by a selectively variable rotational speed that is independent of the rotational speed of the engine output member; a primary power consuming device being selectively operatively connectable to the engine to selectively receive rotary power therefrom; a pump; an epicyclic geartrain including first, second, and third members; said first member being operatively connected to the engine to receive rotary power therefrom, said second member being operatively connected to the motor to receive rotary power therefrom, and said third member being operatively connected to the pump to transmit rotary power thereto; means, including a controller and the epicyclic geartrain, for providing rotary power to the pump exclusively from the engine when an engine speed is above a predetermined value; and means, including the controller and the epicyclic geartrain, for providing rotary power to the pump from the engine and from the motor concurrently when the engine speed is below the predetermined value and greater than zero.