The invention relates to a fresh gas supply device (20) for an internal combustion engine (1) having a exhaust gas turbocharger (2), said device comprising a charge air inlet (9) for taking in a compressed charge air flow (28) from the exhaust gas turbo charger (2); an outlet (10) which is connected to the charge air inlet (9) via a valve section (17), said valve section (17) being closed in a closed position by at least one flap valve (23) which can be pivoted, preferably, about a flap rotational axis (24); an adjusting device (22) which is coupled to the at least one flap valve (23) for adjusting the same in the closing direction; and a compressed air inlet (11) for taking in compressed air into the outlet (10). Said compressed air inlet (11) is arranged such that the compressed air is directed into a compressed air flow (30) in the direction of the valve section (17) to the at least one flap valve (23). The invention also relates to a corresponding method for operating said fresh gas supply device (20).