Cooling of blown air
2 - Coolant expansion tank; 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 - Charge air cooler circulation pump; A - Coolant return; B - Coolant supply; C - Coolant expansion hose; D - Coolant expansion tank ventilation line
An intercooler is essentially a heat exchanger designed to reduce the temperature of the air passing through it.
The air, compressed in the compressor, heats up. At the same time, the partial pressure of oxygen drops. To prevent this, an intercooler is used, after which the cooled air enters the intake manifold.
Compressed air does not enter the inlet pipe (as in conventional diesel engines), and into the intercooler. The intercooler is located at the front of the engine compartment and is cooled by liquid that is passed 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.
By cooling the injected air, the filling of the cylinders increases, and by reducing the temperature of the exhaust gases, the content of nitrogen oxides in them is reduced.
(Article was obtained from the portal: «Mercedesman.ru»)
The separate working circuit of the intercooler includes a charge air radiator (110/2), a coolant radiator (110/10) and an electric pump (M44). An additional radiator (110/11) is also installed.
The air pumped into the engine, heated by compression in the compressor, is driven through the radiator (110/2), where it gives off some of its heat to 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 air flow (temperature and pressure) are measured downstream of the intercooler and the measurement results are transmitted to the ECM (N3/10).
The intercooler pump is activated by an individual relay located in the engine relay and fuse box (K40/8kW).