In recent years, environmental protection has become a goal shared by policymakers, governments, private companies and citizens. The large number of policies, such as the plan 20-20-20, and companies seeking to reduce emissions and energy consumption confirm this growing interest. Energy management becomes really important in hybrid electric vehicles to reduce pollutant emissions and minimize fuel consumption. Hybrid technology applied to urban transport increases in recent years due to the introduction of urban legislation, which include restricted traffic zones in the city center or restrictions on vehicle engine emissions. In this paper a numerical model, realized in Matlab Simulink, is presented. The model takes into account all the elements necessary to reproduce the behavior of a Hybrid Bus. The objective is to implement a control strategy to partialize the energy sources so as guarantee propulsion and operation of vehicle's auxiliary systems. We realized the control using if-then rules, considering the dynamic of every single component of the vehicle.