System and method for a range extender engine of a hybrid electric vehicle

摘要

Methods and systems are provided for improving the operating range of an electric vehicle having an engine wherein waste heat generated during motor operation is transferred to pre-heat the engine. Engine starting is predicted based on the electrical torque demand of the vehicle relative to the actual and predicted electrical energy consumption of the electric vehicle. Prior to starting the engine to charge a battery of the motor, various engine components are pre-heated in an order that improves vehicle range while also optimizing fuel economy.