Patent ID: 8721491
Filing Date: 2014-05-13
Classification: B60K,F16H,Y02T

Abstract:
1. A powertrain comprising: an input member; an output member; a stationary member; a motor/generator; a first and a second planetary gear set, each having a first member, a second member, and a third member; wherein the motor/generator is continuously connected for common rotation with the first member of the second planetary gear set; a first interconnecting member continuously connecting the second member of the first planetary gear set for common rotation with the third member of the second planetary gear set; a second interconnecting member continuously connecting the third member of the first planetary gear set for common rotation with the second member of the second planetary gear set; a plurality of torque-transmitting mechanisms each selectively engageable to connect a different one of the members of the planetary gear sets for common rotation with one of the input member, the stationary member, or with another of the members of the planetary gear sets; wherein one of the torque-transmitting mechanisms is a first clutch selectively engageable to connect the first member of the second planetary gear set for common rotation with the input member; wherein the first clutch is axially between the first and the second planetary gear sets, and the second planetary gear set is axially between the motor/generator and the first clutch; and wherein the torque-transmitting mechanisms are selectively engageable in different combinations of only two to provide at least four fixed forward speed ratios and a reverse speed ratio between the input member and the output member.