Cooling for passenger cars

Only a few years ago, the primary task of the engine cooling system was to safeguard the engine block from overheating. To keep pace with demands to improve fuel consumption, emissions, and cabin comfort, engine cooling has increasingly assumed a more complex role, namely that of a thermal management system. And it will continue to take on further tasks to comply with the new CO2 and emissions standards—independent of the ongoing trend toward electrification of the powertrain. Although “component protection” remains a key functional aspect, nowadays additional components in the engine have to be cooled or heated by the coolant circuit at different times.

Whereas in the past, circuits and components were statically designed to accommodate high loads, in the future we will see systems geared toward dynamics, i.e., demand-based cooling.