Most of the current turbocharger accessories are adjusted on the exhaust side, and when charging is not required.

There are two control methods of bypass valve turbochargers, one is mechanical supercharging, which is usually used in truck diesel engines; The other is electronic control, which is usually used in cars.

When the exhaust turbine pressure is too high, the turbocharger bypass valve will open, so that the exhaust gas from the engine will be directly discharged without passing through the exhaust turbine, so as to avoid the phenomenon of excessive pressure of the turbocharger.