NOVELTY - The method comprises partially dehydrogenating a fuel (34) made from hydrocarbons the by palladium catalyst (36) and introducing the partially dehydrogenated fuel together with the hydrogen (38) into an internal combustion engine (20). Heat is supplied to partial dehydrogenation and is supplied from the internal combustion engine. The partial dehydrogenation is carried out at 200-450 degrees C. The partially dehydrogenated fuel and the hydrogen are led without separation immediately by the dehydrogenation jointly into the combustion power machine.    USE - Method for operating internal combustion engine of motor vehicles, aircrafts or water craft with fuel made from hydrocarbons, where the internal combustion engine is otto- or diesel engine or a turbine (all claimed).    ADVANTAGE - The method ensures simple operation of internal combustion engine with reduced maintenance cost and reduced emission of soot.    DETAILED DESCRIPTION - The method comprises partially dehydrogenating a fuel (34) made from hydrocarbons the by palladium catalyst (36) and introducing the partially dehydrogenated fuel together with the hydrogen (38) into an internal combustion engine (20). Heat is supplied to partial dehydrogenation and is supplied from the internal combustion engine. The partial dehydrogenation is carried out at 200-450 degrees C. The partially dehydrogenated fuel and the hydrogen are led without separation immediately by the dehydrogenation jointly into the combustion power machine. The emerged hydrogen is dissolved during the dehydrogenation in the liquid fuel and/or produced as blisters in the fluid fuel. The partially dehydrated fuel is injected with the hydrogen together into the internal combustion engine. An INDEPENDENT CLAIM is included for a fuel supply system for supplying of fuel to internal combustion engine.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of a fuel supply system for supplying of fuel to internal combustion engine.    Heat supply unit (18)    Internal combustion engine (20)    Fuel (34)    Palladium catalyst (36)    Hydrogen. (38)