Thermal Management

Thermal Management

A thermal management system is used to ensure the engine reaches the optimum operating temperature as quickly as possible after a cold start and to minimize friction inside the transmission. The transmission cooling circuit is therefore connected to the engine cooling system via a heat exchanger. Specific heat exchange between the engine and transmission in line with requirements makes a contribution to increasing the fuel economy of the Cayenne models. After a cold engine start, for example, the rapidly heated engine coolant warms up the transmission cooling system to reduce frictional resistance inside the transmission as quickly as possible. When the temperatures begin to increase, the heat exchanger is then used for cooling purposes. If the cooling effect of the single heat exchanger is not sufficient, the system reverts to the more powerful air heat exchanger installed in the body front section.