With the heat pump in use and the heat exchanger still wet from prior cooling, the heat exchanger temperature is set for a given required temperature (TNsoll) in the heat exchanger outlet airflow. This temperature is no greater than (TA + TO). (TA) is the ...

The windscreen drying device for the side of the windscreen (2) facing the passenger compartment, has a humidity sensor in the form of a conductor path applied to the inside of the windscreen, coupled to a control device for automatic activation of a devic...

An improved vehicle climate control system develops a fog factor indicative of the relative potential of windglass fogging, and uses the index to schedule offsets to normal control settings of the system. The air dewpoint temperature at the front windglass...

An improved vehicle climate control system (10) in which the passenger compartment temperature and humidity are controlled without requiring a humidity sensor. The control is based on the recognition that the air temperature (EOAT) at the evaporator outlet...

The detector for fogging of a motor vehicle windscreen uses values of the average surface temperature (Tr) of the screen (Tv) and a dew point temperature (Tr) for the air in the passenger space. Comparison of the two temperatures is representative of the r...

A method is provided of determining the windshield fog boundary humidity for automatically controlling a heating, ventilation and air conditioning (HVAC) system of a vehicle. The method includes the steps of determining a windshield parameter for the vehic...

A method is provided of preventing windshield fogging for automatically controlling a heating, ventilation and air conditioning (HVAC) system of a vehicle. The method includes the steps of determining whether rain is occurring on a windshield of a vehicle,...