Abstract
Keywords - Hybrid electric vehicle, Control strategy, Fuzzy logic, Thermostat control, City bus.
With the stricter limitations on both fuel consumption and air pollution, the benefits of Hybrid Electric Vehicles (HEVs) are becoming more evident than ever. In this paper, a thermostat and a Fuzzy Logic Controller (FLC) for a series hybrid city bus are implemented and compared. The Fuzzy Logic (FL) control is chosen because of the need to a controller for a nonlinear, multi-domain and time varying plant with multiple uncertainties. The designed controller is used in the project of manufacturing the first hybrid electric bus of the middle-east at "Vehicle, Fuel and Environment (VFE) research institute" of university of Tehran.