Abstract: A method is provided for controlling a system (i.e., a heating, ventilating and/or air-conditioning of a motor vehicle. The control unit generates a control signal that regulates the system given a deviation of the actual value from a prescribed desired value by a threshold in order to reduce the deviation, wherein the threshold is varied as a function of a noise level prevailing inside the vehicle. In addition, a computer program product is provided for implementing such a method, as well as a correspondingly equipped air-conditioning system of a vehicle.

Abstract: A device for control of the air flow rates into the instrument panel air outlets of a vehicle heating or air conditioning unit is described that is provided with a casing, with damper doors for both instrument panel side air outlets in the casing parts and at least one damper door for the instrument panel central air outlet in the casing part, whereby the damper doors are pivotably supported on one common shaft. Exactly one closing position is assigned to the damper doors in the first casing part, whereas several closing positions are assigned to the damper door in the second casing part continuously over a pivoting range of the shaft, whereby the closing position of the damper doors is arranged in the pivoting range of the damper door. This device enables separation and independent control of the air flow rates.

Abstract: The invention relates to a device for tempering and ventilating of motor vehicles with an air inlet opening and an air outlet region, wherein air flows are distributed into different vehicle regions. The device is provided with a basic casing, through which a partition extends to divide the flow path of the air from the air inlet opening to the air outlet region into two flow paths. In one flow path, a waste heat exchanger is arranged to heat the air.

Abstract: A device for control of the air flow rates into the instrument panel air outlets of a vehicle heating or air conditioning unit is described that is provided with a casing, with damper doors for both instrument panel side air outlets in the casing parts and at least one damper door for the instrument panel central air outlet in the casing part, whereby the damper doors and are pivotably supported on one common shaft. Exactly one closing position is assigned to the damper doors in the casing part, whereas several closing positions are assigned to the damper door in the casing part continuously over a pivoting range of the shaft, whereby the closing position of the damper doors is arranged in the pivoting range of the damper door. This device enables to achieve separation and independent control of the air flow rates.