i. chitsaz

Hybrid electric vehicles are getting more attention due to the fuel consumption and emission issue in megacities. Energy management strategy and battery capacity are the primary factors for the energy efficiency of range-extended hybrid electric vehicles. Iran khodro Powertrain Company has unveiled a series of hybrid electric vehicles and is improving its performance constantly. In the present study, minimum battery and generator capacity based on experimental data of this vehicle for different driving conditions are presented. Based on the direct integration of experimental data, minimum battery size is calculated to get extremums in energy consumption. Generator capacity is also calculated based on energy slope curve. Small battery size improves battery integration into the vehicle and also the vehicle weight is reduced that improves fuel consumption. The hybrid electric vehicle is also simulated on different driving cycles to ensure that the calculated battery and generator size is appropriate in different conditions.