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This work presents the research and development program of Laboratõrio de Hi̠drogênio da UNICAMP for substitution of automotive petroleum fuels by electrolytic produced hydrogen. The possibilities of partial diesel substitution by one mixture of diesel and hydrogen and the total gasoline substitution in a Otto-cycle engine were examined. In both cases the hydrogen storage was realized in the hydride form, with the manufacture of one reservoir of FeTi alloy and other of Mg-Ni alloy. This option for the hydride form was because the massive use of hydrogen requires an adequate solution for the problem of its storage. The diagrams of the gas installation in the vehicles, the reservoirs and the adaptation of the gasoline and diesel vehicles to hydrogen are also presented.