ACTUATOR

A turbo actuator is a valve that diverts exhaust gases away from the turbine wheel — helping to control the speed of the turbine and prevent it from over-speeding, and in turn, regulating the speed of the compressor and so the boost pressure.

A/R RATIO

A turbocharger's A/R (aspect ratio) typically is the number that is cast into an exhaust-turbine housing that identifies the size of the housing, from the inlet to the radius from the center of the turbine wheel. Basically, the larger the number, the bigger the housing.When increasing A/R the flow will becomes increasingly radial, while decreasing A/R the inflow will be more in the axial direction, which has an effect on the efficiency and flow capacity of the turbine.

BOOST

Boost is positive pressure created by a turbo or supercharger. It forces more air into the engine. This can be matched with more fuel, to create a bigger bang inside the cylinders - resulting in more power.

BURST CONTAINMENT

In order not to have these fragments cause any damage to the surroundings of the turbocharger, the turbocharger is designed to contain all fragments in case of the explosion of one of the wheels. Typically, this is done by creating sufficient wall thickness of the compressor cover and turbine housing.

CARTRIDGE

The cartridge is the core of the turbocharger, containing the shaft, the turbine wheel, the compressor wheel and the bearing system, all mounted to the bearing housing.

COMPRESSOR

Compressor is a device used to inject a gas stream, in this case an air flow. In the turbocharger, the compressor is its COLD part and serves to inject airflow into the cylinders of the engine, by means of the compressor wheel, which rotates by the shaft rotating with the wheel of the turbine in the hot partmei.