Functions of turbo cartridge

Generally, an car gas engine have higher requirement on turbochargers than that of a diesel engine, as the revolving speed of a car engine is higher and its air velocity is faster. In structure, the progress on turbo cartridge designs makes the wide application come true.

As for a car, an exhaust turbocharger is usually installed around the exhaust pipe. A turbine wheel and turbo compressor impeller are divided in the turbine part and compressor part with rigid coaxial connection and synchronous rotation.

The center housing rotating assembly (CHRA) is also called turbocharger cartridge which is comprised of the shaft that connects the compressor wheel and turbine wheel. Some bearing systems, such as thrust bearing or ball bearing, are included as well to keep the rotating assembly to rotate at very high speed with minimal friction.

The adjusting devices of a turbocharger are mostly at the side of air outlet; when turbocharging is not needed, some exhaust will bypass away from the turbo. When the engine speed reach 1800 RPM, the solenoid valve will close bypass valve automatically and let exhaust flow into turbine to get it rotate In addition, adjusting angles of turbine blades to different turbine speed can be used to to change the charging power.

As the working temperature of turbo cartridge increases, it may not only reduce the turbo work efficiency, but also cause deflagration. So a device to reduce inlet temperature is in need. That is called the intercooler. It is installed between the turbo inlet and intake pipes, cooling the air intake into the car engine cylinder. It's just like a radiator inside of cartridge with wind or water, and the  heat spread into the atmosphere. According to related tests, an intercooler with good performance  can not only keep engine compression ratio to some certain value not to get deflagration, but also improve the inlet pressure the engine's effective power.