Automatic transmission with one or more dynamically controllable one way clutches

A transmission system for a vehicle, comprising:

• an input configured to couple to a prime mover of the vehicle;
• a first gear ratio;
• a second gear ratio;
• a first dynamic controllable clutch (DCC) operable in an engaged state, a disengaged state, and a one-way clutch state;
• a second dynamic controllable clutch (DCC) operable in the engaged state, the disengaged state, and the one-way clutch state;
• an output;
• and
• a controller comprising instructions stored in non-transitory memory that are executable by the controller to:
• during a first setting, operate the first DCC and the second DCC, where the first DCC is in the engaged state, and torque is transferred from the input to the output via the first DCC while maintaining the second DCC in the disengaged state.

A method for shifting gears in a transmission, comprising:

• operating with a first dynamic controllable clutch (DCC) and a second dynamic controllable clutch (DCC) in a first setting, where the first DCC is in an engaged state to transfer torque from a first input to a first output and selectively couples a first shaft to a second shaft via a first reduction set, and the second DCC is in a disengaged state to not transfer torque from a second input to a second output and does not selectively couple the first shaft to the second shaft via a second reduction set that is complementary to the second DCC;
• transitioning the first DCC and second DCC from the first setting to a second setting, such that:
• the first DCC transitions to the disengaged state, where the first DCC does not transfer torque from the first input to the first output, and decouples the first reduction set from coupling the first shaft to the second shaft;
• the second DCC transitions from the disengaged state to a partially engaged state, where the second DCC transitions to a one-way clutch mode, where the second DCC transfers torque from the second input to the second output during rotation in a first direction;
• a difference in rotational speed between the second input and the second output reduces below a threshold of rotational speed;
• and
• the second DCC transitions from the partially engaged state to the engaged state, where the second DCC transfers torque from the second input to the second output during rotation in the first direction or a second direction, where the second direction is opposite to the first direction.