Patent ID: 8532858

Claim:
A hybrid powertrain comprising: a prime mover having a drive member; a multi-speed transmission having an input member and an output member; a first motor/generator continuously connected for common rotation with the drive member; a second motor/generator continuously connected for common rotation with the input member; a damper connected with the input member; a damper clutch selectively engageable to connect the first motor/generator and the drive member for common rotation with the second motor/generator and the input member through the damper; a controller operatively connected to the motor/generators and the damper clutch and configured to establish: a hybrid series operating mode when the prime mover is on, the damper clutch is disengaged, the first motor/generator is controlled to function as a generator, and the second motor/generator is controlled to function as a motor; and a hybrid parallel operating mode when the prime mover is on, the damper clutch is engaged, and the first and second motor/generators are controlled to function as motors.