Patent ID: 8121765
Filing Date: 2012-02-21
Classification: B60K,B60L,B60W,F16H,Y02T

Abstract:
1. A method for controlling an electro-mechanical transmission operatively coupled to first and second electric machines to transmit power to an output member, the method comprising: determining motor torque constraints for the first and second electric machines; determining battery power constraints for an electrical energy storage device electrically connected to the first and second electric machines; determining a range for a first torque input to the electro-mechanical transmission; determining a range for a second torque input to the electro-mechanical transmission; determining a preferred output torque to the output member of the electro-mechanical transmission that is achievable within the motor torque constraints, is achievable within the range for the first torque input, is achievable within the range for the second torque input, and is based upon the battery power constraints; and controlling operation of the electro-mechanical transmission and the first and second electric machines to achieve the preferred output torque to the output member of the electro-mechanical transmission; wherein determining the preferred output torque comprises: