Method and apparatus for controlling operation of a hybrid powertrain during a key-on crank start event
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 batt...
Saved in:
Main Authors | , |
---|---|
Format | Patent |
Language | English |
Published |
13.05.2015
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | 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. |
---|---|
Bibliography: | Application Number: CN201210002796 |