First of all, let's talk about the structure and principle of turbocharger accessories. The exhaust turbocharger accessories are mainly composed of pump wheel and turbine, and of course there are other control elements. The pump wheel and turbine are connected by a shaft, that is, the rotor. The exhaust gas from the engine drives the pump wheel, the pump wheel drives the turbine to rotate, and the turbine rolls to pressurize the intake system.

The supercharger is installed on the exhaust side of the engine, so the operating temperature of the supercharger is very high, and the rotor speed of the supercharger during operation is very high, which can reach more than 100000 revolutions per minute. Such high speed and temperature make the common mechanical needle or ball bearings unable to work for the rotor. Therefore, the turbocharger accessories are widely used full floating bearings, which are smoothed by oil and cooled by coolant.

At one time, turbocharger accessories were mostly used in diesel engines. Now some gasoline engines also use turbocharger accessories. Because the burning methods of gasoline and diesel are different, the way of selecting turbocharger accessories for the engine is also different.

Turbocharging can easily exceed the supercharging value of 1 bar, for example, the Golf R can reach 1.3. Many refitted vehicles can easily achieve a high supercharging value of 1.5 after cylinder strengthening and computer adjustment, for example, the original supercharging value of the 10th generation of Aibao STI is 0.9, and it can easily reach 1.5 after adjusting the engine computer. However, the supercharging value of the household non-functional car we generally buy is far below 1, generally between 0.3 and 0.5, which can balance the function, fuel consumption and the life of the starter. It can be seen that the turbocharging value is much higher than that of mechanical turbocharging, and the corresponding engine power gain is also greater.

Engineering mechanical supercharger, piston type aviation engine is used to add air cylinder inlet pressure. The air before entering the engine cylinder is compressed by the supercharger to improve the air density, so that more air is filled into the cylinder, and then the engine power is increased. The engine with supercharger can not only output large takeoff power, but also improve the altitude characteristics of the engine.