Supercharging (summary)

Charging causes higher pressure and a better filling. The compression is most often lower than with the aspirating engine. The compressor is driven by the engine. This avoids a turbo lag, and lowers the response time.

The G-charger is a compressor. It compresses through an eccentric rotation and there are often problems with the sealing. The charger is driven by the exhaust gas. The pressure is regulated by the blow off valve (middle right).

The charger produces more pressure than needed.
The excess pressure is dispatched off through the bypass plate. Two-stroke-engines started featuring chargers.
They used compressed air also for starting the engine.

Charge air cooler: By cooling the heated air in the turbinethere is more achievement and less fuel consumption almost for free. High exhaust gas- and charge pressures at low numbers of revolution through electrically adjustable guide vanes.

The Comprex-charger combines the advantages of the turbo-charger with the compressor. The drive from the engine is just important for controlling purposes. The Turbo charger and compressor are placed one after the other. Disadvantageously is the complexity of the system.

This setup is also called 'Biturbo'.

Larger engines are equipped with two parallel small instead of one large charger to improve the response time. There is one small charger for a better response time, and a larger one for larger volumes, arranged one after the other.

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