Defogging system for the front and rear windshields of a vehicle

Details Defogging system for the front and rear windshields of a vehicle Defogging system for the front and rear windshields of a vehicle

1996-06-18

1997-08-05

Walberg, Teresa J.

Electric heating

Heating devices

Combined with diverse-type art device

219508, 219509, 165 43, 237 123A, 237 28, B60L 102, B60H 102

Patent

active

056539045

ABSTRACT:
A system for automatically defogging both the windshield and rear window of an automobile. The system includes moisture and dew detection sensors positioned on the interior surfaces of the windshield and the rear window of the automobile. The sensors transmit an electrical current signal to a program control module. If the current received by the program control module from either of the windshield sensors exceeds a predetermined response threshold, it will energize a relay to activate the windshield blower. On the other hand, should the program control module receive a signal from one of the sensors on the rear window, it will energize another relay to activate a resistance heating grid on the rear window. When the condensation on either the windshield or rear window has been evaporated, the program control module will deactivate the associated defogging device.

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