Turbocharger

This increase in charge air dencity is accomplished on most modern diesel engine types by use of exhasut gas turbo charging, in which a turbine wheel driven by exhaust from the engine is rigidly coupled to a centrifugal type air compressor.

Both four-stroke and two-stroke cycle engines may be pressure charged

Fuel oil is thought to be one of the main factors having much to do with the operation and maintenance of an engine.