Patent ID: 8112207
Filing Date: 2012-02-07
Classification: B60K,B60W,F16H,Y02T,Y10T

Abstract:
1. Method for controlling a hybrid transmission including first and second torque machines and an energy storage device connected thereto, the hybrid transmission operative to transfer power between an input member and an output member and the first and second torque machines in a continuously variable operating range state, the method comprising: determining a preferred output torque; determining a relationship between power from the energy storage device and an output torque of the transmission; determining power constraints from the energy storage device; determining motor torque constraints for the first and second torque machines; determining a first relationship comprising linear output torque constraints correlated to the motor torque constraints for the first and second torque machines and clutch reactive torque constraints; determining a second relationship comprising quadratic output torque constraints correlated to the power constraints from the energy storage device and the relationship between the power from the energy storage device and the output torque of the transmission device; and simultaneously solving the first and second relationships to determine an output torque to the output member responsive to the preferred output torque and achievable within the linear output torque constraints and the quadratic output torque constraints.