First of all, let's talk about the general structural principle of the turbocharger accessories. The exhaust gas turbocharger accessories are mainly composed of pump wheels and turbines, and of course there are other control components. The pump wheel and the turbine are connected by a shaft, which is the rotor. The exhaust gas from the engine drives the pump wheel, and the pump wheel drives the turbine to rotate. After the turbine rotates, it pressurizes 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 is very high during operation, which can reach hundreds of thousands of revolutions per minute. Such a high speed and The temperature makes common mechanical needle or ball bearings unable to work for the rotors, so turbocharger components generally use full-floating bearings, lubricated by oil, and cooled by coolant for the supercharger. In the past, turbocharger accessories were mostly used on diesel engines, and now some gasoline engines also use turbocharger accessories. Because the combustion methods of gasoline and diesel are different, the way the engine uses turbocharger accessories is also different.

Turbocharging can easily exceed the boost value of 1bar, for example, the Golf R can reach 1.3. Many modified cars can easily achieve a high boost value of 1.5 after cylinder strengthening and computer tuning. However, the non-functional cars we usually buy for home use, such as Golf 1.4T and Regal 2.0T for home use, have boost values far below 1, usually between 0.3-0.5, which can balance performance, fuel consumption and engine life. . It can be seen that the boost value of turbocharging is much higher than that of supercharging, and the corresponding increase in engine power is also greater.

Construction machinery supercharger, a device used to increase the intake pressure of the cylinder in piston-type aeroengines. The air before entering the engine cylinder is first compressed by the supercharger to increase the density of the air, so that more air can be filled into the cylinder, and then the engine power is increased. The engine equipped with a supercharger can not only output a larger take-off power, but also improve the altitude characteristics of the engine.