Two motor power-split hybrid system with selectable one-way clutch enabled lockable planetary gear sets for two-speed dual motor EV and engine plus dual motor drive modes
Abstract:
A hybrid drive train includes a first electric motor, a nested power splitting planetary gear set having a first carrier element and a second carrier element, an inner sun gear coupled with the first electric motor and an outer sun gear coupled with an output shaft. A first selectable one-way clutch controls the first and the second carrier element, and switches between operation as a one way clutch and operation as a brake. A second selectable one-way clutch controls a ring gear of the nested planetary gear set, and switches between operation as a one way clutch and operation as a brake. The extra outer planetary gear set improves towing capacity at higher speeds without substantially increasing the axial length of the power split device.
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