Invention Grant
US08655526B2 Method and apparatus for controlling operation of a hybrid powertrain during a key-on crank start event 有权
在键盘启动事件期间控制混合动力系的操作的方法和装置

Method and apparatus for controlling operation of a hybrid powertrain during a key-on crank start event
Abstract:
A method for starting an internal combustion engine in a hybrid powertrain having an electric torque machine mechanically coupled to the internal combustion engine includes monitoring a temperature state of the hybrid powertrain, determining a maximum discharging power limit of the high-voltage battery corresponding to the temperature state of the hybrid powertrain, estimating an engine drag torque associated with the temperature state of the hybrid powertrain, selecting a preferred engine cranking speed associated with the estimated engine drag torque and achievable at less than the maximum discharging power limit of the high-voltage battery, and controlling the electric torque machine to generate a magnitude of motor torque output sufficient to crank the internal combustion engine at the preferred engine cranking speed.
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