GUI LIN NEW GLORY MACHINERY CO., LTD : principle of turbocharger (5)

When pressurization is not required, such as at idle speed or with the possibility of deflagging, a portion of the exhaust will escape through the bypass valve without entering the turbocharger. When the engine speeds up to 2000 RPM, the solenoid valve closes the bypass valve and directs the exhaust flow to the turbine side, causing the turbine to turn. In addition, another design is to adjust the Angle of turbine blades and adjust the turbine speed through the change of resistance, so as to change the amount of pressurization.

Cooling the air causes it to contract and become denser, squeezing more air into the same volume, and preventing deflagration. Therefore, the turbochargers of cars are equipped with intercoolers, which are generally air-cooled and installed in front of, next to or in a separate position of the engine radiator, and cooled by the head-on airflow of the car or its own fans.

This paper by guilin new ronghuang machinery co., LTD