Principle
The process is controlled by a cylindrical cell rotor whose speed is synchronised with the engine crankshaft speed via a belt or chain. Individual cells alternately open and close the exhaust gas and fresh air apertures, when the aperture on the exhaust gas side is reached pressurized exhaust gas flows into the cell and compresses the fresh air there. As the cell rotor continues to rotate and reaches the aperture on the inlet side the compressed air flows to the engine. Before the exhaust gas can flow the aperture is closed again and the exhaust gas column is reflected before entering the engine. The exhaust gas exits at high speed sucking further intake air into the cell behind it repeating the process.
Read more about this topic: Pressure Wave Supercharger
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