They comprise multiple engine cooling components as well as the condenser, which forms part of the air conditioning circuit. The cooling module primarily consists of a radiator and the charge air cooler. In indirect (coolant-cooled) charge air cooling systems, the charge air cooler is replaced by a low-temperature radiator which is located between the condenser and the radiator. For maximum efficiency, all components are optimally matched. The modules are assembled according to the vehicle design concept, thus reducing development, production, and logistics costs.
Low temperature radiators
In an indirect charge air cooling system, rather than being released directly to the ambient air, the heat from the charge air cooler first passes through a separate, low-temperature coolant circuit (LT cooling circuit) before being discharged to the ambient air by a downstream, low-temperature radiator (LT radiator).The LT radiator of the indirect charge air cooling system is mounted onto the engine cooling module and can be designed more compactly than the direct charge air cooler, without sacrificing performance. This is because heat is transferred from the air to the coolant. The LT radiator can also be optionally used to ensure optimum thermal management of a temperature-sensitive lithium-ion battery, its power electronics, and soon also the condenser of the refrigerant circuit.