Engine supercharging methods can be basically divided into four categories according to the different energy sources used to drive the supercharger.
The supercharger is directly driven by the engine crankshaft through gears (or belts, etc.).
Exhaust gas turbocharging system. The supercharger is driven by the exhaust gas discharged during engine operation.
The compound supercharging system, that is, on the engine, uses both exhaust gas turbocharger and supercharger.
The gas wave supercharging system uses the pulse gas wave of high-pressure exhaust gas to force the air to compress.
