First of all, talk about the general structure of the turbocharger, exhaust turbocharger is mainly composed of pump wheel and turbine, of course, there are some other control components. The pump wheel and the turbine are connected by a shaft, the rotor. The exhaust gas from the engine drives the pump wheel, which turns the turbine, which then increases the intake system.
Turbocharger installed on the exhaust side of the engine, so the working temperature of the supercharger is very high, and the supercharger rotor speed at work is very high, can achieve the similar RPM, high rotation speed and temperature makes common mechanical needle or ball bearing cannot work for the rotor, so the whole floating bearing widely used turbocharger, the engine oil for lubrication, There is coolant for the supercharger cooling. Previously, turbochargers are mostly used in diesel engines, because gasoline and diesel combustion is not the same, so the engine uses the form of turbocharger is also different.
Gasoline engine is different from diesel engine, it is not air into the cylinder, but the mixture of gasoline and air, pressure is too large easy to deflagration. Therefore, the installation of turbochargers must avoid deflagration, which involves two related issues, one is high temperature control, the other is ignition time control.