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A feasibility study related to the realization of a fuel-cell medium-size bus, has been committed by the Tuscany Region with the support of the municipality of Florence and Bologna, and realized by the association ONLUS I2T3 (Industrial Innovation Through Technological Transfer), ENEA, the Italian National Agency for Energy and Environment, and CAM, Carrozzeria Autodromo Modena, an Italian company leader in the field of eco-compatible solutions in the public transport sector. A hybrid traction system has been chosen, to reduce costs and to boost the vehicle efficiency thanks to regenerated energy during deceleration. The paper deals with the general strategic framework, the mission, the vehicle design and, finally, costs and benefits of FCHEVs, compared to conventional buses and hybrid-electric buses with motorgenerators.

This paper presents the experimental results obtained on Fuel Cell System designed and realized in Istituto Motori and based on 16 kW PEM (Proton Exchange Membrane) stack. This activity is part of the HBUS Project, whose goal is the realization of a midi-bus for public transportation in urban areas based on fuel cell technology. This Project involves several private and public partners, comprising Istituto Motori as research institution, I2T3 (Industrial Innovation Through Technological Transfer) agency for technological innovation and project management, together with public transportation companies and vehicle component makers.