Abstract: An aeration flap is automatically controlled in a fully variable manner in a vehicle. A target value is read for a flap position or strength of an airflow of an aeration outlet. A plurality of configurations of aeration flap positions are provided wherein each configuration assigns a resultant noise level and a resultant energy demand for each combination of aeration flap positions. A weighting between noise level and energy demand is specified. Each of the read target values are adapted for a flap position or strength of an airflow according to the specified weighting. The development of noise in the vehicle may be influenced advantageously as a result.

Abstract: In a method for automatically controlling the temperature of the interior of motor vehicles via an electronically controlled air-conditioning system having an evaporator, devices for adjusting the fresh-air fraction and the circulating-air fraction in the vehicle interior, as well as devices for sensing the evaporator temperature, the interior temperature and the outside-air temperature, the recirculating-air fraction is increased when the following occurs: recirculating-air fraction is lower than 100%, the deviation of the actual interior temperature from the desired interior temperature exceeds a defined first threshold, the outside temperature remains essentially constant, and the evaporator temperature rises.