Air cooling
2 - Expansion tank of a cooling liquid; 110/2 - Intercooler; 110/10 - Low temperature cooler; 110/11 - Additional low temperature cooler; B17/8 - Charge air temperature sensor; B28/8 - Charge air pressure sensor; M44 - Air cooler circulation pump; A - Coolant return; B - Coolant supply; C - Coolant expansion hose; D - Coolant expansion tank vent line
The intercooler is essentially a heat exchanger designed to reduce the temperature of the air passing through it.
The air being compressed in the compressor heats up. This reduces the partial pressure of oxygen. To prevent this, an intercooler was used, after which the cooled air enters the intake pipeline.
Compressed air does not enter the intake pipe (as on conventional diesel engines), and into the intercooler. The intercooler is located at the front of the engine compartment and is cooled by liquid running through radiators at the front of the engine compartment. The intercooler looks the same as the radiator of the cooling system. From the intercooler, air is supplied to the intake manifold.
Thanks to the cooling of the charge air, the filling of the cylinders increases, and due to the decrease in the temperature of the exhaust gases, the content of nitrogen oxides in them is reduced.
Separate intercooler work circuit includes charge air cooler (110/2), coolant radiator (110/10) and electric pump (M44). An additional radiator has also been installed (110/11).
The air heated by the compression in the compressor is forced into the engine and driven through the radiator (110/2), in which it gives off part of the heat of the engine coolant. Heat is removed from the coolant in turn in the radiator (110/10), after which the liquid is pumped again by the pump (M44) into the intercooler.
Physical parameters of the air flow (temperature and pressure) measured downstream of the intercooler and reported to the ECM (N3/10).
The activation of the intercooler pump is carried out by means of an individual relay placed in the box of the relay and engine fuses (K40/8kW).