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Cooling - Thermal Management 2

Below you can click on a video showing a thermostat controlled by a characteristic diagram. But there are still the small and the big cooling circuit about which is regulated here. Let's keep the coolant pump and divide the cooling circuits more.

Thermal management reduces consumption by up to four percent.

We are replacing the thermostat with the Schaeffler thermal management module shown above. Here, a servomotor acts on a rotary valve, which enables the coolant to travel in various ways. If the engine has just been started, this sensor-controlled module first lets the coolant in the engine without any travelling.

The cylinder head is the first to warm up and is now connected to the heat exchanger for oil coolant (picture below), because lubrication unaffected by low temperature is essential for the life of the engine. Only then is the heating for the interior switched on.

At some point the thermal management has to switch from heating to cooling, important e.g. for the fast heating of turbocharger(s). And then also the large cooling circuit possibly sometime even needs a fan in action. It's important to mention that this module for thermal management works in clocked mode, i.e. it can control temperatures and is also used in gearboxes, for example. 09/15

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