Regasification apparatus for the supply of vehicles' endothermic engines of the type in which they are provided: at least one cryogenic cylinder for the storage, in liquid form, of a fuel gas mixture; heating means interposed along a fuel supply pipe connecting said cryogenic cylinder to the fuel supply system of the vehicle's engine, intended to heat the fuel gas mixture in liquid form from the sub-zero temperature to which it is taken, to bring it back to the gaseous state at a temperature compatible with the fuel supply system of the same engine, said apparatus comprising a closed loop circulation assembly where a heat transfer fluid is circulated, for the storage of cold energy extracted from said fuel gas mixture during its heating phase, said assembly being characterized in that it provides: - a first tank, adapted to store, at ambient temperature, a volume not less than 0,1 m 3 of said heat transfer fluid in liquid phase; - devices for the withdrawal, with controlled flow rate, of said fluid from the first tank and for flowing it through a first pipe; - a fluid / fluid heat exchanger, defining said heating means and located downstream of said first pipe between the cryogenic cylinder and the fuel supply system of the engine, in which said heat transfer fluid, being an antifreeze liquid which is in liquid phase at ambient pressure and at a temperature of -15 °C, exchanges heat with a cold branch of said fuel supply pipe, thereby lowering its temperature; - an insulated second tank adapted to store a volume not less than 0,1 m 3 of said heat transfer fluid in liquid phase and suitable to keep the cold antifreeze fluid stored as long as it is not required to be used; - an insulated second pipe, at output of said fluid /fluid heat exchanger, for conveying the cooled heat transfer fluid to said second tank; - at least one insulated derivative piping connected to said second tank for receiving cold heat transfer fluid and conveying it to an utility present in said vehicle in which a cooling action is required, said utility being not in thermal contact with said first tank and second tank; - at least a third pipe, placed downstream said utility, for returning the heat transfer fluid, heated back at ambient temperature, into said first tank said apparatus providing a programmable management system configured for managing the cold energy stored in said second tank and supplying the stored cold energy in a delayed manner to said at least one utility. - a first tank, adapted to store, at ambient temperature, a volume not less than 0,1 m 3 of said heat transfer fluid in liquid phase; - devices for the withdrawal, with controlled flow rate, of said fluid from the first tank and for flowing it through a first pipe; - a fluid / fluid heat exchanger, defining said heating means and located downstream of said first pipe between the cryogenic cylinder and the fuel supply system of the engine, in which said heat transfer fluid, being an antifreeze liquid which is in liquid phase at ambient pressure and at a temperature of -15 °C, exchanges heat with a cold branch of said fuel supply pipe, thereby lowering its temperature; - an insulated second tank adapted to store a volume not less than 0,1 m 3 of said heat transfer fluid in liquid phase and suitable to keep the cold antifreeze fluid stored as long as it is not required to be used; - an insulated second pipe, at output of said fluid /fluid heat exchanger, for conveying the cooled heat transfer fluid to said second tank; - at least one insulated derivative piping connected to said second tank for receiving cold heat transfer fluid and conveying it to an utility present in said vehicle in which a cooling action is required, said utility being not in thermal contact with said first tank and second tank; - at least a third pipe, placed downstream said utility, for returning the heat transfer fluid, heated back at ambient temperature, into said first tank