| 主权项 |
1. A method for controlling a hybrid powertrain, the powertrain including a drive axle, an engine operatively coupled to the drive axle, a first electric machine operatively coupled to the drive axle, a second electric machine operatively coupled to the drive axle, and a controller in communication with the engine, the first electric machine, and the second electric machine, the method comprising:
receiving, via the controller, a torque request; determining, via the controller, whether the hybrid powertrain is operating in the electric-only operating mode, wherein the engine is off when the hybrid powertrain is operating in the electric-only mode; determining, via the controller, a plurality of possible motor torques of the first and second electric machines capable of achieving the torque requested only if the hybrid powertrain is operating in the electric-only mode; determining system power losses of the powertrain for all the possible motor torques of the first and second electric machines capable of achieving the torque requested while the hybrid powertrain is operating in the electric-only mode; determining a lowest power loss of the system power losses determined for the plurality of possible motor torques of the first and second electric machines while the hybrid powertrain is operating in the electric-only mode; determining a first operating torque for the first electric machine and a second operating torque for the second electric machine that correspond to the lowest power loss while the hybrid powertrain is operating in the electric-only mode; and commanding, via the controller, the first electric machine to generate the first operating torque and the second electric machine to generate the second operating torque in order to achieve the torque requested while minimizing the system power losses while the hybrid powertrain is operating in the electric-only mode. |
