Combustion engine, fresh air system and associated operating method

摘要

The method involves generating pressure oscillations in vibration tube and/or resonant system (18), when resonance system is operated at low rotational speed of internal combustion engine (1) in compression mode, so that positive vibration amplitudes in combustion chambers (4) of engine are included during gas exchange process of chambers to increase boost pressure. The pressure oscillations are also generated when resonant system is operated at high rotational speed of engine in expansion mode, so that negative amplitudes are included during gas exchange process, to reduce boost pressure. Independent claims are included for the following: (1) fresh air system for internal combustion engine; and (2) internal combustion engine.