Hybrid transmission with integrated torque machine
View Patent ↗A hybrid transmission device for a hybrid powertrain system having an integrated torque machine to transfer power among an input member, the torque machine and an output member in one of a plurality of fixed gear and continuously variable states is operative in a plurality of fixed gear states, a continuously variable state, and a torque machine state.
1. A transmission device, comprising:
an input member coupled to a first element of an input differential gearset;
a second element of the input differential gearset coupled to a third element of an output differential gearset;
a third element of the input differential gearset coupled to a second element of a reactive differential gearset;
a torque machine including a rotor and a stator;
the rotor of the torque machine rotatably coupled to the third element of the input differential gearset and the second element of the reactive differential gearset;
an output member coupled to a second element of the output differential gearset and coupled to a third element of the reactive gearset;
a first clutch device configured to selectively couple rotation of the input member to rotation of a first element of the reactive differential gearset;
a second clutch device configured to selectively ground rotation of the first element of the reactive differential gearset;
a third clutch device configured to selectively couple rotation of the input member to rotation of the second element of the reactive differential gearset;
a fourth clutch device configured to selectively ground rotation of a first element of the output differential gearset;
the transmission configured to transfer torque among the input member and the output member in one of a plurality of fixed gear states when selected pairs of the first, second, third, and fourth clutch devices are applied;
the transmission configured to transfer torque between the input member, the torque machine, and the output member in a continuously variable state when only the fourth clutch device is applied;
the transmission configured to transfer torque between the torque machine and the output member in a torque machine state when the first and second clutch devices are applied; and
the transmission configured to transfer torque between the torque machine and the input member in an energy storage device charging state when all of the clutch devices are deactivated.
2. The transmission device of claim 1 , further comprising the transmission device configured to execute a launch maneuver by transferring torque among the input member, the torque machine, and the output member in the continuously variable state when only the fourth clutch device is applied.
3. The transmission device of claim 1 , further comprising a fifth clutch device configured to selectively ground the rotor of the torque machine and the third element of the input differential gearset.
4. The transmission device of claim 3 , further comprising the transmission device configured to execute a launch maneuver in a first fixed gear state only when the fourth and fifth clutch devices are applied.
5. The transmission device of claim 3 , wherein the fifth clutch device comprises a two-way selectable one-way clutch device.
6. The transmission device of claim 5 , further comprising the transmission device configured to execute a launch maneuver in a forward fixed gear state only when the fourth clutch device is applied and the two-way selectable one-way clutch device is applied in a first direction.
7. The transmission device of claim 5 , further comprising the transmission device configured to execute a launch maneuver in a reverse fixed gear state only when the fourth clutch device is applied and the two-way selectable one-way clutch device is applied in a second direction.
8. The transmission device of claim 1 , further comprising the transmission device configured to transfer torque between the input member and the output member in one of five fixed gear states when selected pairs of the first, second, third, and fourth clutch devices are applied.
9. The transmission device of claim 3 , further comprising the transmission device configured to transfer torque between the input member and the output member in one of six fixed gear states when selected pairs of the first, second, third, fourth, and fifth clutch devices are applied.
10. The transmission device of claim 1 , further comprising:
the transmission device configured to transfer torque between the torque machine and the output member in the torque machine state when rotation of the input member is stopped and the first and second clutch devices are applied.
11. The transmission device of claim 1 , further comprising the transmission device configured to transfer torque among the input member, the torque machine, and the output member in a torque machine-assisted fixed gear state when selected pairs of the first, second, third, and fourth clutch devices are applied.