HEV Charge/Discharge Control System Based on Navigation Information 2004-21-0028

This paper proposes a new charge/discharge control system for hybrid electric vehicles based on the use of car navigation information. A conventional control system feeds back the battery state of charge (SOC) and controls the amount of charge/discharge to keep the battery SOC within a specified range. In contrast, the proposed control system is a predictive control system. According to information on the traffic conditions and road grade along the route suggested by the car navigation system, the system predicts the vehicle’s operating status, schedules the battery SOC along the route and controls the amount of charging/discharging. The effectiveness of the proposed system on improving fuel economy has been confirmed using actual traffic and road condition data.