Two Stage Turbocharger

The result is optionally higher power density and, in conjunction with Miller engine cycle, reduced exhaust emissions and lower fuel consumption. The Two-Stage Turbo charging the charge air pressure can be increased substantially. 
Exhaust air,fresh air and oil channels are accentuated in colour.
Both turbo chargers control flaps and the fresh-air valve.
The turbines and throttle valves can be moved.

Two Stage Turbocharger