Exhaust gas turbocharger working principle: exhaust gas from the engine exhaust manifold 

is high temperature and high pressure, with a certain amount of energy. In naturally 

aspirated engines, this energy is often wasted as the exhaust gas is emitted. And the 

exhaust gas turbocharger power source is mainly these exhaust gases. The turbine impeller 

and compressor impeller are rigidly connected through the supercharger shaft, which is 

called the supercharger rotor. The rotor of the supercharger is fixed in the supercharger 

by floating bearing.

When the engine is working, the exhaust gas impinges the turbine impeller at a certain 

Angle at a high speed, so that the supercharger rotor rotates at a high speed. The high 

speed rotation of the compressor impeller makes the air pressure in the intake manifold 

of the engine rise, so as to achieve the pressurization effect. In this way, during the intake 

process, the air will be subjected to a greater pressure, so that more and denser air into 

the cylinder. In this way, the fuel can be burned more fully and the performance of the 

engine can be improved.

Classification of exhaust gas turbochargers: according to the different turbines used, 

exhaust gas turbochargers are divided into runoff and axial flow two kinds. Runoff 

turbocharger adopts runoff turbine and centrifugal compressor, small flow, suitable for 

medium and small power internal combustion engine; Axial flow turbocharger adopts 

axial flow turbine and centrifugal compressor, with large flow, suitable for large diesel 

engines.