Talk about the general structure of the turbocharger
First of all, let's talk about the general structure of the Turbocharger J80S.The exhaust gas turbocharger is mainly composed of a pump wheel and a turbine, and of course there are other control components. The pump wheel and the turbine are connected by a shaft, that is, the rotor. The exhaust gas discharged from the engine drives the pump wheel, and the pump wheel drives the turbine to rotate. After the turbine rotates, the air intake system is pressurized. The supercharger is installed on the exhaust side of the engine, so the working temperature of the supercharger is very high, and the speed of the rotor of the supercharger is very high when it is working, which can reach hundreds of thousands of revolutions per minute, such a high speed and temperature The common mechanical needle roller or ball bearing cannot work for the rotor, so the turbocharger generally adopts a fully floating bearing, which is lubricated by oil, and the coolant is used to cool the supercharger. In the past, turbochargers were mostly used in diesel engines, and now some gasoline engines also use turbochargers. Because gasoline and diesel burn differently, there are differences in the way the engine uses a turbocharger.
Turbocharger J80S boost can easily exceed 1bar boost value, such as 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. For example, the original factory boost value of the tenth generation Impreza STI is 0.9, and it can easily reach 1.5 after adjusting the engine computer. However, the household non-performance cars we generally buy, such as the Golf 1.4T and Regal 2.0T for home use, have a boost value much lower than 1, generally between 0.3-0.5, which can balance performance, fuel consumption and engine life. It can be seen from this that the turbocharger has a much higher boost value than the supercharger, and the corresponding increase in engine power is also greater.
