Ventilation device

Details Ventilation device Ventilation device

2005-08-19

2009-12-01

McAllister, Steven B (Department: 3749)

Ventilation

Vehicle

Condensation preventer

Reexamination Certificate

active

07625274

ABSTRACT:
A ventilation device for ventilating the interior of a motor vehicle, and a method therefore, in which sensor for determining at least one parameter reflecting the degree of glass condensation is used to determine whether to maintain the vehicle ventilation system in recirculation mode during the actuation of a windshield and/or headlight washer, or to switch to a fresh air mode. In response to the sensor signals, an evaluation device generates a signal for at least temporarily switching to fresh air mode when a parameter value exceeds a predefined value, or generates a time period for a residence time to be observed in recirculation air mode.

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