Patent ID: 8998760
Filing Date: 2015-04-07
Classification: B60K,F16H,Y02T

Abstract:
1. A hybrid powertrain having a transmission powered by an engine, the powertrain comprising: an input member; an output member; first, second, and third planetary gear sets each having first, second and third members, wherein the input member is continuously connected for common rotation with the first member of the second planetary gear set; a first interconnecting member continuously interconnecting the third member of the first planetary gear set with the second member of the second planetary gear set; a second interconnecting member continuously interconnecting the second member of the first planetary gear set and the output member with the third member of the third planetary gear set; a third interconnecting member continuously interconnecting the third member of the second planetary gear set with the second member of the third planetary gear set; six torque transmitting mechanisms selectively engageable to interconnect at least one of the first, second, and third members with at least another of the first, second, third members and a stationary member; a first damper continuously interconnected with the engine; a one-way clutch for selectively interconnecting the first damper with the input member; a second damper continuously interconnected to the input member; an electric motor continuously interconnected to the second damper to provide a driving torque to the input member; a disconnect clutch for selectively interconnecting the first damper to the electric motor; and a hydraulic pump continuously interconnected with the input member, wherein the hydraulic pump supplies a pressurized hydraulic fluid to the transmission, wherein the torque transmitting mechanisms are selectively engageable in combinations of at least two to establish a plurality of forward speed ratios and at least one reverse speed ratio between the input member and the output member and the first damper has a spring rate and a hysteresis that is lower than a spring rate and a hysteresis of the second damper.