Patent ID: 8287426
Filing Date: 2012-10-16
Classification: B60K,B60L,B60W,F16H,Y02T,Y10T

Abstract:
1. Method for controlling a powertrain system including a first power actuator, a second power actuator, a transmission device and an energy storage device coupled to one of the first power actuator and the second power actuator, the transmission device operative to transfer power between an output member, and the first and second power actuators, the method comprising: monitoring voltage of the energy storage device; providing a base voltage limit, an intermediate power constraint, a preferred voltage limit, and a trigger voltage limit for the energy storage device, said preferred voltage limit defining a preferred voltage range; modifying the preferred voltage limit when the voltage of the energy storage device transgresses the trigger voltage limit; monitoring a power command to the first power actuator; estimating an output power of the energy storage device for the power command; determining a power constraint of the first power actuator based on the intermediate power constraint when the voltage of the energy storage device is within the preferred voltage range; and determining a power constraint of the first power actuator based on the estimated output power of the energy storage device when the voltage of the energy storage device transgresses the preferred voltage limit.