A pressure wave supercharger for compressing fresh air for an internal combustion engine comprises a cold gas housing, a hot gas housing, and a rotor casing which is arranged therebetween and inside which a rotatable cell rotor is disposed; the hot gas housing comprises a high-pressure exhaust gas duct and a low-pressure exhaust gas duct, while the cold gas housing comprises a fresh air duct and a charge air duct; the high-pressure exhaust gas duct, the low-pressure exhaust gas duct, the fresh air duct and the charge air duct are fluidically connected to the cell rotor; the hot gas housing comprises a first bearing, and the cold gas housing comprises a second bearing; the cell rotor comprises a rotor shaft that is mounted in the first and second bearings; and the hot gas housing comprises a heat exchanger which is designed in such a way that at least the first bearing can be cooled.

A pressure wave supercharger for compressing fresh air for an internal combustion engine, comprising a cold gas housing, a hot gas housing, and a rotor casing which is arranged therebetween and inside which a rotatable cell rotor is disposed; the hot gas housing comprises a high-pressure exhaust gas duct and a low-pressure exhaust gas duct, while the cold gas housing comprises a fresh air duct and a charge air duct; the high-pressure exhaust gas duct, the low-pressure exhaust gas duct, the fresh air duct and the charge air duct are fluidically connected to the cell rotor; the cold gas housing comprises a cell rotor bearing, the cell rotor is connected to a rotor shaft that is mounted in the cell rotor bearing, and the cell rotor is split in the direction in which the rotor shaft extends and comprises at least one first cell rotor part and a second cell rotor part.

A pressure wave supercharger for compressing fresh air for an internal combustion engine, comprising a cold gas housing, a hot gas housing, and a rotor casing which is arranged therebetween and inside which a rotatable cell rotor is disposed; the hot gas housing comprises a high-pressure exhaust gas duct and a low-pressure exhaust gas duct, while the cold gas housing comprises a fresh air duct and a charge air duct; the high-pressure exhaust gas duct, the low-pressure exhaust gas duct, the fresh air duct and the charge air duct are fluidically connected to the cell rotor; the cold gas housing comprises a cell rotor bearing, the cell rotor is connected to a rotor shaft that is mounted in the cell rotor bearing, and the cell rotor is split in the direction in which the rotor shaft extends and comprises at least one first cell rotor part and a second cell rotor part.

A metal cellular wheel (10) for a pressure wave supercharger comprising an outer sleeve (12) arranged coaxial to a rotational axis (y), an inner sleeve (14) arranged coaxial to the outer sleeve (12), and at least one intermediate sleeve (18) arranged between and coaxial to the outer sleeve (12) and the inner sleeve (14). Fins (16) are arranged between successive sleeves (12, 18; 18, 14), aligned radially to axis (y), and joined to adjacent sleeves (12, 18; 18, 14). On outer sleeve (12), outer sealing sleeves (24) engage over the outer sleeve (12), are joined with the outer sleeve (12), and have a sealing profile (30) for a labyrinth seal. A drive shaft (13) along axis (y) is joined with the inner sleeve (14), and the intermediate sleeve(s) (18) has (have) notches (26) extending, between adjacent fins (16), from both end faces (11) of the cellular wheel (10).

A metal cellular wheel (10) for a pressure wave supercharger comprising an outer sleeve (12) arranged coaxial to a rotational axis (y), an inner sleeve (14) arranged coaxial to the outer sleeve (12), and at least one intermediate sleeve (18) arranged between and coaxial to the outer sleeve (12) and the inner sleeve (14). Fins (16) are arranged between successive sleeves (12, 18; 18, 14), aligned radially to axis (y), and joined to adjacent sleeves (12, 18; 18, 14). On outer sleeve (12), outer sealing sleeves (24) engage over the outer sleeve (12), are joined with the outer sleeve (12), and have a sealing profile (30) for a labyrinth seal. A drive shaft (13) along axis (y) is joined with the inner sleeve (14), and the intermediate sleeve(s) (18) has (have) notches (26) extending, between adjacent fins (16), from both end faces (11) of the cellular wheel (10).