The turbocharger is established on all diesel engines. It increases engine capacity due to increase in pressure in an inlet collector above atmospheric.
The drive of a turbocharger is carried out by exhaust gases. Exhaust gas, passing through a turbocharger, accelerates to high turns the turbine which is located on a shaft on which other end the compressor is installed. The compressor, rotating in own casing, compresses air on the way to an inlet collector.
Between a turbocharger and a final collector compressed air passes through the refrigerator. It is the "air-air" heat exchanger installed before a radiator and cooled by counter air and electric fans of a radiator. The problem of the refrigerator consists in lowering the air temperature which increased at air compression by the compressor.