Turbocharger.

Welcome to the turbo-class: Turbochargers in BMW diesel engines optimise torque development, improve performance and reduce consumption.

Turbochargers compress the air that is channelled into the cylinders, increasing the amount of oxygen available for combustion. They comprise a turbine fan and a compressor, both mounted along a central shaft. The turbine is driven by the hot exhaust gases that are expelled from the combustion chambers following combustion. The compressor drives fresh air into the air intake manifold, after it is cooled by the intercooler.
With a higher concentration of oxygen, more power can be produced at each combustion process.
The result is increased torque and heightened performance, without increasing engine displacement or engine speed. Fuel efficiency is enhanced and emissions are lowered.

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