Charge Air Cooling: Notes

With the introduction of the N63 engine, indirect charge air cooling is used for the first time at BMW. Heat is taken from the charge air by means of an air-to-coolant heat exchanger. This heat is then given off via a coolant-to-air heat exchanger into the ambient air. For this purpose, the charge air cooling system has its own low temperature cooling circuit, which is independent of the engine cooling circuit.

Fig 1: Identifying Charge Air Cooling Components

Courtesy of BMW OF NORTH AMERICA, INC.