Method and apparatus for controlling mild hybrid electric vehicle

A method for controlling a mild hybrid electric vehicle, comprising:

• detecting, by a controller, data for operating the mild hybrid electric vehicle;
• determining, by the controller, a target torque of an engine based on the detected data;
• determining, by the controller, whether an operating condition of a limiting logic of a combustion torque of the engine is satisfied based on a temperature of coolant of the engine;
• determining, by the controller, whether the operating condition of the limiting logic is satisfied based on a temperature of oil of a transmission;
• operating, by the controller, the limiting logic when the operating condition of the limiting logic is satisfied;
• determining, by the controller, a first available combustion torque of the engine based on a speed of the engine and the temperature of the coolant when the limiting logic is operated;
• determining, by the controller, a target torque of a mild hybrid starter and generator (MHSG) based on the target torque of the engine and the first available combustion torque of the engine;
• in response to operating the limiting logic:
• determining, by the controller, a second available combustion torque of the engine based on the speed of the engine and the temperature of the oil;
• determining, by the controller, a final available combustion torque of the engine as a smaller value among the first available combustion torque and the second available combustion torque;
• and
• determining, by the controller, the target torque of the MHSG based on the target torque of the engine and the final available combustion torque of the engine;
• and
• operating, by the controller, the MHSG to generate the target torque of the MHSG.