Patent ID: 7080633

Claim:
A gas-dynamic pressure wave supercharger for supplying charge air to an internal combustion engine comprising: a multi-celled rotor; a low pressure fresh air inlet channel; a high pressure charge air channel leading to the internal combustion engine; a high pressure exhaust channel leading from the internal combustion engine to the rotor, and having an enlarged portion on the rotor side thereof; a low pressure exhaust channel; a bypass duct extending from the enlarged portion which connects the high and low pressure exhaust channels; and a flow control mechanism which cooperates with the enlarged portion of the high pressure exhaust channel and the bypass duet, wherein: the high pressure exhaust channel and the low pressure exhaust channel are enclosed in a gas enclosure; the low pressure fresh air inlet channel and the high pressure charge air channel are enclosed in an air enclosure; the flow control mechanism is configured and operable to vary the volume of the enlarged portion of the high pressure exhaust channel without forming a ridge, and to vary an aperture of the bypass duct such that a part of the exhaust gas flow is always first conducted from the high pressure exhaust channel into the enlarged portion before additional exhaust is conducted from the high pressure exhaust channel to the low pressure exhaust channel through the bypass duct.