Patent ID: 7479081
Filing Date: 2009-01-20
Classification: B60K,F16H,Y02T

Abstract:
1. A transmission for a vehicle with an engine comprising: an input member adapted for receiving power from the engine; an output member; a first and a second motor/generator; a differential gear set having a first, a second, a third, a fourth and a fifth gear element operatively interconnected with one another, wherein said input member is connected for common rotation with said first gear element and said first motor/generator is connected for common rotation with said second gear element; a plurality of intermeshing gears including at least one gear connected for common rotation with said output member; a plurality of selectively engagable torque-transmitting mechanism, including a first motor clutch selectively engagable to connect said second motor/generator for common rotation with said third gear element, a second motor clutch selectively engagable to connect said second motor/generator for common rotation with said fourth gear element, and output torque-transmitting mechanisms; first and second transfer members connected for common rotation with said fourth and fifth gear elements, respectively, and separately operatively connectable with said output member via different ones of said intermeshing gears by engagement of different selected ones of said output torque-transmitting mechanisms, thereby partially forming first and second power paths, respectively, between said input member and said output member; and wherein the transmission provides multiple operating modes including an electrically variable input-split mode established by engagement of said second motor clutch and one of said output torque-transmitting mechanisms which is engagable to operatively connect said output member to said fourth gear element.