Patent ID: 7275610
Filing Date: 2007-10-02
Classification: B60K,B60L,B60W,Y02T,Y10S

Abstract:
1. A method for controlling a hybrid powertrain for an automotive vehicle having a driver controlled engine, an electric motor, a battery, a generator connected to the battery and a gear system that establishes first and second power sources for distributing torque to vehicle traction wheels, the method comprising the steps of: delivering engine torque to a first torque input element of the gear system, delivering reaction torque of the gear system to the motor and generator and delivering torque from a torque output element of the gear system to the traction wheels thereby establishing a power split in a first power source configuration; delivering torque from the motor and generator through the gear system to the traction wheels with the engine deactivated thereby establishing a second power source configuration; and coordinating power delivery from the first and second power sources using a closed-loop calculation of optimum actual allowed driver power demand with actual battery power as a feedback variable whereby a response to driver demand for power will optimize driveline efficiency and performance without exceeding calibrated power limits for the engine and the battery.