The ventilation system conforms in its design to the most modern engine building standards. The fuel tank communicates with the atmosphere through a tank with activated carbon, which absorbs gasoline vapors. The control unit controls the solenoid valve for the ventilation of the activated charcoal tank. From there, gasoline fumes during engine operation are discharged into the combustion chamber and burned. Air is supplied by the solenoid valve in such an amount that the reservoir is cleaned, but this does not adversely affect the operation of the engine.