Method and apparatus for controlling a powertrain system employing multiple torque generating devices

A powertrain system for a vehicle is described, and includes an internal combustion engine mechanically coupled to an electric machine to generate propulsion torque and electric power storable on an energy storage device. A method for controlling the powertrain system includes determining a first desired powertrain output power associated with a road load and determining a second desired powertrain output power associated with a feed-forward state-of-charge (SOC) for the energy storage device. The internal combustion engine and the electric machine are controlled responsive to the first and second desired powertrain output powers. 描述了种用于车辆的动力总成系统,并且其包括内燃机,所述内燃机机械地联接至电机以生成推进扭矩和储存在能量储存装置上的电力。用于控制动力总成系统的方法，包括确定与路载荷相关联的第期望动力总成输出功率，并且确定与用于能量储存装置的前馈荷电状态(SOC)相关联的第二期望动力总成输出功率。响应于第和第二期望动力总成输出功率，内燃机和电机被控制。