Patent ID: 8112192
Filing Date: 2012-02-07
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 wherein a control module performs the following steps, comprising: monitoring output power of the energy storage device; providing a short term electric power limit comprising one of a maximum short term electric power limit and a minimum short term electric power limit, a long term electric power limit comprising one of a maximum long term electric power limit and a minimum long term electric power limit, a trigger electric power limit for the operation of the energy storage device comprising one of an upper trigger electric power limit below the maximum short term electric power limit and a lower trigger electric power limit above the minimum short term electric power limit, and a preferred electric power limit comprising one of a maximum preferred electric power limit between the maximum short term electric power limit and the upper trigger electric power limit and a minimum preferred electric power limit between the minimum short term electric power limit and the lower trigger electric power limit, said maximum preferred electric power limit and said minimum preferred electric power limit defining a preferred power range; modifying the preferred electric power limit when the output power of the energy storage device transgresses the trigger electric power limit comprising one of, 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 long term electric power limit when the power of the energy storage device is within the preferred power range; and determining a power constraint of the first power actuator based on the estimated output power of the energy storage device when the output power of the energy storage device transgresses the preferred electric power limit.