Patent ID: 8753242

Claim:
A vehicular power transmitting system comprising an input shaft connected to an engine, an electric motor connected to a power transmitting path between said input shaft and drive wheels, a first rotary portion disposed on the side of said engine, and a second rotary portion disposed on the side of said electric motor, such that the input shaft, the electric motor, the first rotary portion and the second rotary portion are rotatable relative to each other about a predetermined axis of rotation, said first rotary portion and said second rotary portion providing a torque limiter device configured to limit a transmitting torque to be transmitted between said first and second rotary portions, to a predetermined upper limit, by a slipping motion between said first and second rotary portions, further comprising: a planetary gear set which constitutes a part of the power transmitting path between said input shaft and said drive wheels and which includes a sun gear connected to said electric motor through said torque limiter device, a ring gear connected to said drive wheels, and a carrier which is connected to said input shaft and which supports a pinion gear interposed between said sun gear and said ring gear, such that the pinion gear is rotatable about its axis and an axis of the planetary gear set, wherein an inertia moment of said first rotary portion about said predetermined axis of rotation is smaller than an inertia moment of said second rotary portion about the predetermined axis of rotation.