Audi Ag

Uwe Haas

Thomas Anzenberger

Thomas Reuss

Gunter Zitzler

Expansion reservoir () for a coolant circuit, having a fill opening () that can be closed by a lid () and is located in the geodetically upper region of the expansion reservoir (), wherein a differential-pressure-controlled valve () having at least two switching positions is integrated into the lid (), and having at least one inlet port () which opens into a lid region (), and an outlet port () in the geodetically lower region of the expansion reservoir (), wherein the inlet port () is closed by the valve () in a first switching position and is opened in at least one second switching position, thus allowing the inlet port () to vent into the expansion reservoir ().

Expansion reservoir for a coolant circuit

An invention relates to a cooling system for a vehicle comprising an engine, an engine radiator, and an engine cooling circuit. A second cooling circuit encompassing at least one cooling component can be coupled to the engine radiator and is connected to a coolant recirculation pipe of the engine cooling circuit by means of a branch of a coolant supply pipe of the engine cooling circuit and a recirculation pipe of the cooling component. The second cooling circuit can be alternatively coupled to the coolant recirculation pipe or a coolant supply pipe at the output end in accordance with operating conditions of the engine.

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Stammham, Germany

Uwe Haas